ffmpeg / libavformat / utils.c @ 59f65d95
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/*
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* various utility functions for use within FFmpeg
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "internal.h" |
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#include "libavcodec/internal.h" |
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#include "libavutil/opt.h" |
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#include "metadata.h" |
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#include "id3v2.h" |
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#include "libavutil/avstring.h" |
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#include "riff.h" |
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#include "audiointerleave.h" |
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#include <sys/time.h> |
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#include <time.h> |
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#include <strings.h> |
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#include <stdarg.h> |
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#if CONFIG_NETWORK
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#include "network.h" |
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#endif
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#undef NDEBUG
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#include <assert.h> |
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/**
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* @file
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* various utility functions for use within FFmpeg
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*/
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unsigned avformat_version(void) |
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{ |
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return LIBAVFORMAT_VERSION_INT;
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} |
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const char *avformat_configuration(void) |
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{ |
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return LIBAV_CONFIGURATION;
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} |
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const char *avformat_license(void) |
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{ |
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#define LICENSE_PREFIX "libavformat license: " |
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return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
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} |
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/* fraction handling */
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/**
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* f = val + (num / den) + 0.5.
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*
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* 'num' is normalized so that it is such as 0 <= num < den.
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*
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* @param f fractional number
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* @param val integer value
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* @param num must be >= 0
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* @param den must be >= 1
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*/
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static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) |
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{ |
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num += (den >> 1);
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if (num >= den) {
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val += num / den; |
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num = num % den; |
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} |
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f->val = val; |
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f->num = num; |
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f->den = den; |
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} |
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/**
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* Fractional addition to f: f = f + (incr / f->den).
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*
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* @param f fractional number
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* @param incr increment, can be positive or negative
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*/
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static void av_frac_add(AVFrac *f, int64_t incr) |
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{ |
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int64_t num, den; |
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num = f->num + incr; |
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den = f->den; |
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if (num < 0) { |
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f->val += num / den; |
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num = num % den; |
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if (num < 0) { |
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num += den; |
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f->val--; |
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} |
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} else if (num >= den) { |
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f->val += num / den; |
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num = num % den; |
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} |
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f->num = num; |
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} |
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/** head of registered input format linked list */
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#if !FF_API_FIRST_FORMAT
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static
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#endif
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AVInputFormat *first_iformat = NULL;
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/** head of registered output format linked list */
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#if !FF_API_FIRST_FORMAT
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static
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#endif
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AVOutputFormat *first_oformat = NULL;
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AVInputFormat *av_iformat_next(AVInputFormat *f) |
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{ |
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if(f) return f->next; |
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else return first_iformat; |
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} |
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AVOutputFormat *av_oformat_next(AVOutputFormat *f) |
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{ |
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if(f) return f->next; |
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else return first_oformat; |
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} |
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void av_register_input_format(AVInputFormat *format)
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{ |
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AVInputFormat **p; |
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p = &first_iformat; |
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while (*p != NULL) p = &(*p)->next; |
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*p = format; |
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format->next = NULL;
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} |
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void av_register_output_format(AVOutputFormat *format)
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{ |
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AVOutputFormat **p; |
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p = &first_oformat; |
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while (*p != NULL) p = &(*p)->next; |
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*p = format; |
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format->next = NULL;
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} |
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int av_match_ext(const char *filename, const char *extensions) |
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{ |
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const char *ext, *p; |
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char ext1[32], *q; |
158 |
|
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if(!filename)
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return 0; |
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ext = strrchr(filename, '.');
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if (ext) {
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ext++; |
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p = extensions; |
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for(;;) {
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q = ext1; |
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while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1) |
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*q++ = *p++; |
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*q = '\0';
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if (!strcasecmp(ext1, ext))
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return 1; |
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if (*p == '\0') |
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break;
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p++; |
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} |
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} |
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return 0; |
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} |
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static int match_format(const char *name, const char *names) |
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{ |
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const char *p; |
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int len, namelen;
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if (!name || !names)
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return 0; |
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namelen = strlen(name); |
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while ((p = strchr(names, ','))) { |
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len = FFMAX(p - names, namelen); |
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if (!strncasecmp(name, names, len))
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return 1; |
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names = p+1;
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} |
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return !strcasecmp(name, names);
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} |
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#if FF_API_GUESS_FORMAT
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AVOutputFormat *guess_format(const char *short_name, const char *filename, |
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const char *mime_type) |
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{ |
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return av_guess_format(short_name, filename, mime_type);
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} |
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#endif
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AVOutputFormat *av_guess_format(const char *short_name, const char *filename, |
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const char *mime_type) |
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{ |
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AVOutputFormat *fmt = NULL, *fmt_found;
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int score_max, score;
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/* specific test for image sequences */
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#if CONFIG_IMAGE2_MUXER
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if (!short_name && filename &&
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av_filename_number_test(filename) && |
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av_guess_image2_codec(filename) != CODEC_ID_NONE) { |
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return av_guess_format("image2", NULL, NULL); |
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} |
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#endif
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/* Find the proper file type. */
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fmt_found = NULL;
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score_max = 0;
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while ((fmt = av_oformat_next(fmt))) {
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score = 0;
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if (fmt->name && short_name && !strcmp(fmt->name, short_name))
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score += 100;
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if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
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score += 10;
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if (filename && fmt->extensions &&
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av_match_ext(filename, fmt->extensions)) { |
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score += 5;
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} |
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if (score > score_max) {
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score_max = score; |
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fmt_found = fmt; |
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} |
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} |
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return fmt_found;
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} |
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#if FF_API_GUESS_FORMAT
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AVOutputFormat *guess_stream_format(const char *short_name, const char *filename, |
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const char *mime_type) |
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{ |
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AVOutputFormat *fmt = av_guess_format(short_name, filename, mime_type); |
247 |
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if (fmt) {
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AVOutputFormat *stream_fmt; |
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char stream_format_name[64]; |
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snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name); |
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stream_fmt = av_guess_format(stream_format_name, NULL, NULL); |
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if (stream_fmt)
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fmt = stream_fmt; |
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} |
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return fmt;
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} |
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#endif
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enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
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const char *filename, const char *mime_type, enum AVMediaType type){ |
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if(type == AVMEDIA_TYPE_VIDEO){
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enum CodecID codec_id= CODEC_ID_NONE;
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#if CONFIG_IMAGE2_MUXER
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if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){ |
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codec_id= av_guess_image2_codec(filename); |
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} |
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#endif
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if(codec_id == CODEC_ID_NONE)
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codec_id= fmt->video_codec; |
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return codec_id;
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}else if(type == AVMEDIA_TYPE_AUDIO) |
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return fmt->audio_codec;
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else if (type == AVMEDIA_TYPE_SUBTITLE) |
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return fmt->subtitle_codec;
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else
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return CODEC_ID_NONE;
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} |
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AVInputFormat *av_find_input_format(const char *short_name) |
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{ |
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AVInputFormat *fmt = NULL;
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while ((fmt = av_iformat_next(fmt))) {
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if (match_format(short_name, fmt->name))
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return fmt;
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} |
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return NULL; |
292 |
} |
293 |
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#if FF_API_SYMVER && CONFIG_SHARED && HAVE_SYMVER
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FF_SYMVER(void, av_destruct_packet_nofree, (AVPacket *pkt), "LIBAVFORMAT_52") |
296 |
{ |
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av_destruct_packet_nofree(pkt); |
298 |
} |
299 |
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FF_SYMVER(void, av_destruct_packet, (AVPacket *pkt), "LIBAVFORMAT_52") |
301 |
{ |
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av_destruct_packet(pkt); |
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} |
304 |
|
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FF_SYMVER(int, av_new_packet, (AVPacket *pkt, int size), "LIBAVFORMAT_52") |
306 |
{ |
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return av_new_packet(pkt, size);
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} |
309 |
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FF_SYMVER(int, av_dup_packet, (AVPacket *pkt), "LIBAVFORMAT_52") |
311 |
{ |
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return av_dup_packet(pkt);
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} |
314 |
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FF_SYMVER(void, av_free_packet, (AVPacket *pkt), "LIBAVFORMAT_52") |
316 |
{ |
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av_free_packet(pkt); |
318 |
} |
319 |
|
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FF_SYMVER(void, av_init_packet, (AVPacket *pkt), "LIBAVFORMAT_52") |
321 |
{ |
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av_log(NULL, AV_LOG_WARNING, "Diverting av_*_packet function calls to libavcodec. Recompile to improve performance\n"); |
323 |
av_init_packet(pkt); |
324 |
} |
325 |
#endif
|
326 |
|
327 |
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size) |
328 |
{ |
329 |
int ret= av_new_packet(pkt, size);
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330 |
|
331 |
if(ret<0) |
332 |
return ret;
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333 |
|
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pkt->pos= avio_tell(s); |
335 |
|
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ret= avio_read(s, pkt->data, size); |
337 |
if(ret<=0) |
338 |
av_free_packet(pkt); |
339 |
else
|
340 |
av_shrink_packet(pkt, ret); |
341 |
|
342 |
return ret;
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343 |
} |
344 |
|
345 |
int av_append_packet(AVIOContext *s, AVPacket *pkt, int size) |
346 |
{ |
347 |
int ret;
|
348 |
int old_size;
|
349 |
if (!pkt->size)
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return av_get_packet(s, pkt, size);
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351 |
old_size = pkt->size; |
352 |
ret = av_grow_packet(pkt, size); |
353 |
if (ret < 0) |
354 |
return ret;
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355 |
ret = avio_read(s, pkt->data + old_size, size); |
356 |
av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
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357 |
return ret;
|
358 |
} |
359 |
|
360 |
|
361 |
int av_filename_number_test(const char *filename) |
362 |
{ |
363 |
char buf[1024]; |
364 |
return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0); |
365 |
} |
366 |
|
367 |
AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) |
368 |
{ |
369 |
AVProbeData lpd = *pd; |
370 |
AVInputFormat *fmt1 = NULL, *fmt;
|
371 |
int score;
|
372 |
|
373 |
if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) { |
374 |
int id3len = ff_id3v2_tag_len(lpd.buf);
|
375 |
if (lpd.buf_size > id3len + 16) { |
376 |
lpd.buf += id3len; |
377 |
lpd.buf_size -= id3len; |
378 |
} |
379 |
} |
380 |
|
381 |
fmt = NULL;
|
382 |
while ((fmt1 = av_iformat_next(fmt1))) {
|
383 |
if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
|
384 |
continue;
|
385 |
score = 0;
|
386 |
if (fmt1->read_probe) {
|
387 |
score = fmt1->read_probe(&lpd); |
388 |
} else if (fmt1->extensions) { |
389 |
if (av_match_ext(lpd.filename, fmt1->extensions)) {
|
390 |
score = 50;
|
391 |
} |
392 |
} |
393 |
if (score > *score_max) {
|
394 |
*score_max = score; |
395 |
fmt = fmt1; |
396 |
}else if (score == *score_max) |
397 |
fmt = NULL;
|
398 |
} |
399 |
return fmt;
|
400 |
} |
401 |
|
402 |
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
|
403 |
int score=0; |
404 |
return av_probe_input_format2(pd, is_opened, &score);
|
405 |
} |
406 |
|
407 |
static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score) |
408 |
{ |
409 |
static const struct { |
410 |
const char *name; enum CodecID id; enum AVMediaType type; |
411 |
} fmt_id_type[] = { |
412 |
{ "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
|
413 |
{ "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
|
414 |
{ "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
|
415 |
{ "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
|
416 |
{ "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
|
417 |
{ "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
|
418 |
{ "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
|
419 |
{ "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
|
420 |
{ 0 }
|
421 |
}; |
422 |
AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
|
423 |
|
424 |
if (fmt) {
|
425 |
int i;
|
426 |
av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
|
427 |
pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score); |
428 |
for (i = 0; fmt_id_type[i].name; i++) { |
429 |
if (!strcmp(fmt->name, fmt_id_type[i].name)) {
|
430 |
st->codec->codec_id = fmt_id_type[i].id; |
431 |
st->codec->codec_type = fmt_id_type[i].type; |
432 |
break;
|
433 |
} |
434 |
} |
435 |
} |
436 |
return !!fmt;
|
437 |
} |
438 |
|
439 |
/************************************************************/
|
440 |
/* input media file */
|
441 |
|
442 |
/**
|
443 |
* Open a media file from an IO stream. 'fmt' must be specified.
|
444 |
*/
|
445 |
int av_open_input_stream(AVFormatContext **ic_ptr,
|
446 |
AVIOContext *pb, const char *filename, |
447 |
AVInputFormat *fmt, AVFormatParameters *ap) |
448 |
{ |
449 |
int err;
|
450 |
AVFormatContext *ic; |
451 |
AVFormatParameters default_ap; |
452 |
|
453 |
if(!ap){
|
454 |
ap=&default_ap; |
455 |
memset(ap, 0, sizeof(default_ap)); |
456 |
} |
457 |
|
458 |
if(!ap->prealloced_context)
|
459 |
ic = avformat_alloc_context(); |
460 |
else
|
461 |
ic = *ic_ptr; |
462 |
if (!ic) {
|
463 |
err = AVERROR(ENOMEM); |
464 |
goto fail;
|
465 |
} |
466 |
ic->iformat = fmt; |
467 |
ic->pb = pb; |
468 |
ic->duration = AV_NOPTS_VALUE; |
469 |
ic->start_time = AV_NOPTS_VALUE; |
470 |
av_strlcpy(ic->filename, filename, sizeof(ic->filename));
|
471 |
|
472 |
/* allocate private data */
|
473 |
if (fmt->priv_data_size > 0) { |
474 |
ic->priv_data = av_mallocz(fmt->priv_data_size); |
475 |
if (!ic->priv_data) {
|
476 |
err = AVERROR(ENOMEM); |
477 |
goto fail;
|
478 |
} |
479 |
} else {
|
480 |
ic->priv_data = NULL;
|
481 |
} |
482 |
|
483 |
// e.g. AVFMT_NOFILE formats will not have a AVIOContext
|
484 |
if (ic->pb)
|
485 |
ff_id3v2_read(ic, ID3v2_DEFAULT_MAGIC); |
486 |
|
487 |
if (ic->iformat->read_header) {
|
488 |
err = ic->iformat->read_header(ic, ap); |
489 |
if (err < 0) |
490 |
goto fail;
|
491 |
} |
492 |
|
493 |
if (pb && !ic->data_offset)
|
494 |
ic->data_offset = avio_tell(ic->pb); |
495 |
|
496 |
#if FF_API_OLD_METADATA
|
497 |
ff_metadata_demux_compat(ic); |
498 |
#endif
|
499 |
|
500 |
ic->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
501 |
|
502 |
*ic_ptr = ic; |
503 |
return 0; |
504 |
fail:
|
505 |
if (ic) {
|
506 |
int i;
|
507 |
av_freep(&ic->priv_data); |
508 |
for(i=0;i<ic->nb_streams;i++) { |
509 |
AVStream *st = ic->streams[i]; |
510 |
if (st) {
|
511 |
av_free(st->priv_data); |
512 |
av_free(st->codec->extradata); |
513 |
av_free(st->codec); |
514 |
av_free(st->info); |
515 |
} |
516 |
av_free(st); |
517 |
} |
518 |
} |
519 |
av_free(ic); |
520 |
*ic_ptr = NULL;
|
521 |
return err;
|
522 |
} |
523 |
|
524 |
/** size of probe buffer, for guessing file type from file contents */
|
525 |
#define PROBE_BUF_MIN 2048 |
526 |
#define PROBE_BUF_MAX (1<<20) |
527 |
|
528 |
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
|
529 |
const char *filename, void *logctx, |
530 |
unsigned int offset, unsigned int max_probe_size) |
531 |
{ |
532 |
AVProbeData pd = { filename ? filename : "", NULL, -offset }; |
533 |
unsigned char *buf = NULL; |
534 |
int ret = 0, probe_size; |
535 |
|
536 |
if (!max_probe_size) {
|
537 |
max_probe_size = PROBE_BUF_MAX; |
538 |
} else if (max_probe_size > PROBE_BUF_MAX) { |
539 |
max_probe_size = PROBE_BUF_MAX; |
540 |
} else if (max_probe_size < PROBE_BUF_MIN) { |
541 |
return AVERROR(EINVAL);
|
542 |
} |
543 |
|
544 |
if (offset >= max_probe_size) {
|
545 |
return AVERROR(EINVAL);
|
546 |
} |
547 |
|
548 |
for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt && ret >= 0; |
549 |
probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) { |
550 |
int ret, score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0; |
551 |
int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1; |
552 |
|
553 |
if (probe_size < offset) {
|
554 |
continue;
|
555 |
} |
556 |
|
557 |
/* read probe data */
|
558 |
buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE); |
559 |
if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) { |
560 |
/* fail if error was not end of file, otherwise, lower score */
|
561 |
if (ret != AVERROR_EOF) {
|
562 |
av_free(buf); |
563 |
return ret;
|
564 |
} |
565 |
score = 0;
|
566 |
ret = 0; /* error was end of file, nothing read */ |
567 |
} |
568 |
pd.buf_size += ret; |
569 |
pd.buf = &buf[offset]; |
570 |
|
571 |
memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
|
572 |
|
573 |
/* guess file format */
|
574 |
*fmt = av_probe_input_format2(&pd, 1, &score);
|
575 |
if(*fmt){
|
576 |
if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration |
577 |
av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
|
578 |
}else
|
579 |
av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
|
580 |
} |
581 |
} |
582 |
|
583 |
if (!*fmt) {
|
584 |
av_free(buf); |
585 |
return AVERROR_INVALIDDATA;
|
586 |
} |
587 |
|
588 |
/* rewind. reuse probe buffer to avoid seeking */
|
589 |
if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0) |
590 |
av_free(buf); |
591 |
|
592 |
return ret;
|
593 |
} |
594 |
|
595 |
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, |
596 |
AVInputFormat *fmt, |
597 |
int buf_size,
|
598 |
AVFormatParameters *ap) |
599 |
{ |
600 |
int err;
|
601 |
AVProbeData probe_data, *pd = &probe_data; |
602 |
AVIOContext *pb = NULL;
|
603 |
void *logctx= ap && ap->prealloced_context ? *ic_ptr : NULL; |
604 |
|
605 |
pd->filename = "";
|
606 |
if (filename)
|
607 |
pd->filename = filename; |
608 |
pd->buf = NULL;
|
609 |
pd->buf_size = 0;
|
610 |
|
611 |
if (!fmt) {
|
612 |
/* guess format if no file can be opened */
|
613 |
fmt = av_probe_input_format(pd, 0);
|
614 |
} |
615 |
|
616 |
/* Do not open file if the format does not need it. XXX: specific
|
617 |
hack needed to handle RTSP/TCP */
|
618 |
if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
|
619 |
/* if no file needed do not try to open one */
|
620 |
if ((err=avio_open(&pb, filename, URL_RDONLY)) < 0) { |
621 |
goto fail;
|
622 |
} |
623 |
if (buf_size > 0) { |
624 |
ffio_set_buf_size(pb, buf_size); |
625 |
} |
626 |
if (!fmt && (err = av_probe_input_buffer(pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) { |
627 |
goto fail;
|
628 |
} |
629 |
} |
630 |
|
631 |
/* if still no format found, error */
|
632 |
if (!fmt) {
|
633 |
err = AVERROR_INVALIDDATA; |
634 |
goto fail;
|
635 |
} |
636 |
|
637 |
/* check filename in case an image number is expected */
|
638 |
if (fmt->flags & AVFMT_NEEDNUMBER) {
|
639 |
if (!av_filename_number_test(filename)) {
|
640 |
err = AVERROR_NUMEXPECTED; |
641 |
goto fail;
|
642 |
} |
643 |
} |
644 |
err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap); |
645 |
if (err)
|
646 |
goto fail;
|
647 |
return 0; |
648 |
fail:
|
649 |
av_freep(&pd->buf); |
650 |
if (pb)
|
651 |
avio_close(pb); |
652 |
if (ap && ap->prealloced_context)
|
653 |
av_free(*ic_ptr); |
654 |
*ic_ptr = NULL;
|
655 |
return err;
|
656 |
|
657 |
} |
658 |
|
659 |
/*******************************************************/
|
660 |
|
661 |
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
|
662 |
AVPacketList **plast_pktl){ |
663 |
AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
|
664 |
if (!pktl)
|
665 |
return NULL; |
666 |
|
667 |
if (*packet_buffer)
|
668 |
(*plast_pktl)->next = pktl; |
669 |
else
|
670 |
*packet_buffer = pktl; |
671 |
|
672 |
/* add the packet in the buffered packet list */
|
673 |
*plast_pktl = pktl; |
674 |
pktl->pkt= *pkt; |
675 |
return &pktl->pkt;
|
676 |
} |
677 |
|
678 |
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
|
679 |
{ |
680 |
int ret, i;
|
681 |
AVStream *st; |
682 |
|
683 |
for(;;){
|
684 |
AVPacketList *pktl = s->raw_packet_buffer; |
685 |
|
686 |
if (pktl) {
|
687 |
*pkt = pktl->pkt; |
688 |
if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
|
689 |
!s->streams[pkt->stream_index]->probe_packets || |
690 |
s->raw_packet_buffer_remaining_size < pkt->size){ |
691 |
AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data; |
692 |
av_freep(&pd->buf); |
693 |
pd->buf_size = 0;
|
694 |
s->raw_packet_buffer = pktl->next; |
695 |
s->raw_packet_buffer_remaining_size += pkt->size; |
696 |
av_free(pktl); |
697 |
return 0; |
698 |
} |
699 |
} |
700 |
|
701 |
av_init_packet(pkt); |
702 |
ret= s->iformat->read_packet(s, pkt); |
703 |
if (ret < 0) { |
704 |
if (!pktl || ret == AVERROR(EAGAIN))
|
705 |
return ret;
|
706 |
for (i = 0; i < s->nb_streams; i++) |
707 |
s->streams[i]->probe_packets = 0;
|
708 |
continue;
|
709 |
} |
710 |
st= s->streams[pkt->stream_index]; |
711 |
|
712 |
switch(st->codec->codec_type){
|
713 |
case AVMEDIA_TYPE_VIDEO:
|
714 |
if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
|
715 |
break;
|
716 |
case AVMEDIA_TYPE_AUDIO:
|
717 |
if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
|
718 |
break;
|
719 |
case AVMEDIA_TYPE_SUBTITLE:
|
720 |
if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
|
721 |
break;
|
722 |
} |
723 |
|
724 |
if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
|
725 |
!st->probe_packets)) |
726 |
return ret;
|
727 |
|
728 |
add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); |
729 |
s->raw_packet_buffer_remaining_size -= pkt->size; |
730 |
|
731 |
if(st->codec->codec_id == CODEC_ID_PROBE){
|
732 |
AVProbeData *pd = &st->probe_data; |
733 |
av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
|
734 |
--st->probe_packets; |
735 |
|
736 |
pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); |
737 |
memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size); |
738 |
pd->buf_size += pkt->size; |
739 |
memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
|
740 |
|
741 |
if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
|
742 |
//FIXME we dont reduce score to 0 for the case of running out of buffer space in bytes
|
743 |
set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0); |
744 |
if(st->codec->codec_id != CODEC_ID_PROBE){
|
745 |
pd->buf_size=0;
|
746 |
av_freep(&pd->buf); |
747 |
av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
|
748 |
} |
749 |
} |
750 |
} |
751 |
} |
752 |
} |
753 |
|
754 |
/**********************************************************/
|
755 |
|
756 |
/**
|
757 |
* Get the number of samples of an audio frame. Return -1 on error.
|
758 |
*/
|
759 |
static int get_audio_frame_size(AVCodecContext *enc, int size) |
760 |
{ |
761 |
int frame_size;
|
762 |
|
763 |
if(enc->codec_id == CODEC_ID_VORBIS)
|
764 |
return -1; |
765 |
|
766 |
if (enc->frame_size <= 1) { |
767 |
int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
|
768 |
|
769 |
if (bits_per_sample) {
|
770 |
if (enc->channels == 0) |
771 |
return -1; |
772 |
frame_size = (size << 3) / (bits_per_sample * enc->channels);
|
773 |
} else {
|
774 |
/* used for example by ADPCM codecs */
|
775 |
if (enc->bit_rate == 0) |
776 |
return -1; |
777 |
frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
|
778 |
} |
779 |
} else {
|
780 |
frame_size = enc->frame_size; |
781 |
} |
782 |
return frame_size;
|
783 |
} |
784 |
|
785 |
|
786 |
/**
|
787 |
* Return the frame duration in seconds. Return 0 if not available.
|
788 |
*/
|
789 |
static void compute_frame_duration(int *pnum, int *pden, AVStream *st, |
790 |
AVCodecParserContext *pc, AVPacket *pkt) |
791 |
{ |
792 |
int frame_size;
|
793 |
|
794 |
*pnum = 0;
|
795 |
*pden = 0;
|
796 |
switch(st->codec->codec_type) {
|
797 |
case AVMEDIA_TYPE_VIDEO:
|
798 |
if(st->time_base.num*1000LL > st->time_base.den){ |
799 |
*pnum = st->time_base.num; |
800 |
*pden = st->time_base.den; |
801 |
}else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){ |
802 |
*pnum = st->codec->time_base.num; |
803 |
*pden = st->codec->time_base.den; |
804 |
if (pc && pc->repeat_pict) {
|
805 |
*pnum = (*pnum) * (1 + pc->repeat_pict);
|
806 |
} |
807 |
//If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
|
808 |
//Thus if we have no parser in such case leave duration undefined.
|
809 |
if(st->codec->ticks_per_frame>1 && !pc){ |
810 |
*pnum = *pden = 0;
|
811 |
} |
812 |
} |
813 |
break;
|
814 |
case AVMEDIA_TYPE_AUDIO:
|
815 |
frame_size = get_audio_frame_size(st->codec, pkt->size); |
816 |
if (frame_size <= 0 || st->codec->sample_rate <= 0) |
817 |
break;
|
818 |
*pnum = frame_size; |
819 |
*pden = st->codec->sample_rate; |
820 |
break;
|
821 |
default:
|
822 |
break;
|
823 |
} |
824 |
} |
825 |
|
826 |
static int is_intra_only(AVCodecContext *enc){ |
827 |
if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
|
828 |
return 1; |
829 |
}else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){ |
830 |
switch(enc->codec_id){
|
831 |
case CODEC_ID_MJPEG:
|
832 |
case CODEC_ID_MJPEGB:
|
833 |
case CODEC_ID_LJPEG:
|
834 |
case CODEC_ID_RAWVIDEO:
|
835 |
case CODEC_ID_DVVIDEO:
|
836 |
case CODEC_ID_HUFFYUV:
|
837 |
case CODEC_ID_FFVHUFF:
|
838 |
case CODEC_ID_ASV1:
|
839 |
case CODEC_ID_ASV2:
|
840 |
case CODEC_ID_VCR1:
|
841 |
case CODEC_ID_DNXHD:
|
842 |
case CODEC_ID_JPEG2000:
|
843 |
return 1; |
844 |
default: break; |
845 |
} |
846 |
} |
847 |
return 0; |
848 |
} |
849 |
|
850 |
static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
851 |
int64_t dts, int64_t pts) |
852 |
{ |
853 |
AVStream *st= s->streams[stream_index]; |
854 |
AVPacketList *pktl= s->packet_buffer; |
855 |
|
856 |
if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
|
857 |
return;
|
858 |
|
859 |
st->first_dts= dts - st->cur_dts; |
860 |
st->cur_dts= dts; |
861 |
|
862 |
for(; pktl; pktl= pktl->next){
|
863 |
if(pktl->pkt.stream_index != stream_index)
|
864 |
continue;
|
865 |
//FIXME think more about this check
|
866 |
if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
|
867 |
pktl->pkt.pts += st->first_dts; |
868 |
|
869 |
if(pktl->pkt.dts != AV_NOPTS_VALUE)
|
870 |
pktl->pkt.dts += st->first_dts; |
871 |
|
872 |
if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
|
873 |
st->start_time= pktl->pkt.pts; |
874 |
} |
875 |
if (st->start_time == AV_NOPTS_VALUE)
|
876 |
st->start_time = pts; |
877 |
} |
878 |
|
879 |
static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt) |
880 |
{ |
881 |
AVPacketList *pktl= s->packet_buffer; |
882 |
int64_t cur_dts= 0;
|
883 |
|
884 |
if(st->first_dts != AV_NOPTS_VALUE){
|
885 |
cur_dts= st->first_dts; |
886 |
for(; pktl; pktl= pktl->next){
|
887 |
if(pktl->pkt.stream_index == pkt->stream_index){
|
888 |
if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
|
889 |
break;
|
890 |
cur_dts -= pkt->duration; |
891 |
} |
892 |
} |
893 |
pktl= s->packet_buffer; |
894 |
st->first_dts = cur_dts; |
895 |
}else if(st->cur_dts) |
896 |
return;
|
897 |
|
898 |
for(; pktl; pktl= pktl->next){
|
899 |
if(pktl->pkt.stream_index != pkt->stream_index)
|
900 |
continue;
|
901 |
if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
|
902 |
&& !pktl->pkt.duration){ |
903 |
pktl->pkt.dts= cur_dts; |
904 |
if(!st->codec->has_b_frames)
|
905 |
pktl->pkt.pts= cur_dts; |
906 |
cur_dts += pkt->duration; |
907 |
pktl->pkt.duration= pkt->duration; |
908 |
}else
|
909 |
break;
|
910 |
} |
911 |
if(st->first_dts == AV_NOPTS_VALUE)
|
912 |
st->cur_dts= cur_dts; |
913 |
} |
914 |
|
915 |
static void compute_pkt_fields(AVFormatContext *s, AVStream *st, |
916 |
AVCodecParserContext *pc, AVPacket *pkt) |
917 |
{ |
918 |
int num, den, presentation_delayed, delay, i;
|
919 |
int64_t offset; |
920 |
|
921 |
if (s->flags & AVFMT_FLAG_NOFILLIN)
|
922 |
return;
|
923 |
|
924 |
if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
|
925 |
pkt->dts= AV_NOPTS_VALUE; |
926 |
|
927 |
if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == FF_B_TYPE)
|
928 |
//FIXME Set low_delay = 0 when has_b_frames = 1
|
929 |
st->codec->has_b_frames = 1;
|
930 |
|
931 |
/* do we have a video B-frame ? */
|
932 |
delay= st->codec->has_b_frames; |
933 |
presentation_delayed = 0;
|
934 |
|
935 |
// ignore delay caused by frame threading so that the mpeg2-without-dts
|
936 |
// warning will not trigger
|
937 |
if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
|
938 |
delay -= st->codec->thread_count-1;
|
939 |
|
940 |
/* XXX: need has_b_frame, but cannot get it if the codec is
|
941 |
not initialized */
|
942 |
if (delay &&
|
943 |
pc && pc->pict_type != FF_B_TYPE) |
944 |
presentation_delayed = 1;
|
945 |
|
946 |
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63 |
947 |
/*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
|
948 |
pkt->dts -= 1LL<<st->pts_wrap_bits;
|
949 |
} |
950 |
|
951 |
// some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
|
952 |
// we take the conservative approach and discard both
|
953 |
// Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
|
954 |
if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){ |
955 |
av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
|
956 |
pkt->dts= pkt->pts= AV_NOPTS_VALUE; |
957 |
} |
958 |
|
959 |
if (pkt->duration == 0) { |
960 |
compute_frame_duration(&num, &den, st, pc, pkt); |
961 |
if (den && num) {
|
962 |
pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
|
963 |
|
964 |
if(pkt->duration != 0 && s->packet_buffer) |
965 |
update_initial_durations(s, st, pkt); |
966 |
} |
967 |
} |
968 |
|
969 |
/* correct timestamps with byte offset if demuxers only have timestamps
|
970 |
on packet boundaries */
|
971 |
if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
|
972 |
/* this will estimate bitrate based on this frame's duration and size */
|
973 |
offset = av_rescale(pc->offset, pkt->duration, pkt->size); |
974 |
if(pkt->pts != AV_NOPTS_VALUE)
|
975 |
pkt->pts += offset; |
976 |
if(pkt->dts != AV_NOPTS_VALUE)
|
977 |
pkt->dts += offset; |
978 |
} |
979 |
|
980 |
if (pc && pc->dts_sync_point >= 0) { |
981 |
// we have synchronization info from the parser
|
982 |
int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num; |
983 |
if (den > 0) { |
984 |
int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den; |
985 |
if (pkt->dts != AV_NOPTS_VALUE) {
|
986 |
// got DTS from the stream, update reference timestamp
|
987 |
st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den; |
988 |
pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
989 |
} else if (st->reference_dts != AV_NOPTS_VALUE) { |
990 |
// compute DTS based on reference timestamp
|
991 |
pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den; |
992 |
pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
993 |
} |
994 |
if (pc->dts_sync_point > 0) |
995 |
st->reference_dts = pkt->dts; // new reference
|
996 |
} |
997 |
} |
998 |
|
999 |
/* This may be redundant, but it should not hurt. */
|
1000 |
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
|
1001 |
presentation_delayed = 1;
|
1002 |
|
1003 |
// av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc);
|
1004 |
/* interpolate PTS and DTS if they are not present */
|
1005 |
//We skip H264 currently because delay and has_b_frames are not reliably set
|
1006 |
if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){ |
1007 |
if (presentation_delayed) {
|
1008 |
/* DTS = decompression timestamp */
|
1009 |
/* PTS = presentation timestamp */
|
1010 |
if (pkt->dts == AV_NOPTS_VALUE)
|
1011 |
pkt->dts = st->last_IP_pts; |
1012 |
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); |
1013 |
if (pkt->dts == AV_NOPTS_VALUE)
|
1014 |
pkt->dts = st->cur_dts; |
1015 |
|
1016 |
/* this is tricky: the dts must be incremented by the duration
|
1017 |
of the frame we are displaying, i.e. the last I- or P-frame */
|
1018 |
if (st->last_IP_duration == 0) |
1019 |
st->last_IP_duration = pkt->duration; |
1020 |
if(pkt->dts != AV_NOPTS_VALUE)
|
1021 |
st->cur_dts = pkt->dts + st->last_IP_duration; |
1022 |
st->last_IP_duration = pkt->duration; |
1023 |
st->last_IP_pts= pkt->pts; |
1024 |
/* cannot compute PTS if not present (we can compute it only
|
1025 |
by knowing the future */
|
1026 |
} else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){ |
1027 |
if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
|
1028 |
int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts); |
1029 |
int64_t new_diff= FFABS(st->cur_dts - pkt->pts); |
1030 |
if(old_diff < new_diff && old_diff < (pkt->duration>>3)){ |
1031 |
pkt->pts += pkt->duration; |
1032 |
// av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
|
1033 |
} |
1034 |
} |
1035 |
|
1036 |
/* presentation is not delayed : PTS and DTS are the same */
|
1037 |
if(pkt->pts == AV_NOPTS_VALUE)
|
1038 |
pkt->pts = pkt->dts; |
1039 |
update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts); |
1040 |
if(pkt->pts == AV_NOPTS_VALUE)
|
1041 |
pkt->pts = st->cur_dts; |
1042 |
pkt->dts = pkt->pts; |
1043 |
if(pkt->pts != AV_NOPTS_VALUE)
|
1044 |
st->cur_dts = pkt->pts + pkt->duration; |
1045 |
} |
1046 |
} |
1047 |
|
1048 |
if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
|
1049 |
st->pts_buffer[0]= pkt->pts;
|
1050 |
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
1051 |
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
|
1052 |
if(pkt->dts == AV_NOPTS_VALUE)
|
1053 |
pkt->dts= st->pts_buffer[0];
|
1054 |
if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here |
1055 |
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
|
1056 |
} |
1057 |
if(pkt->dts > st->cur_dts)
|
1058 |
st->cur_dts = pkt->dts; |
1059 |
} |
1060 |
|
1061 |
// av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
|
1062 |
|
1063 |
/* update flags */
|
1064 |
if(is_intra_only(st->codec))
|
1065 |
pkt->flags |= AV_PKT_FLAG_KEY; |
1066 |
else if (pc) { |
1067 |
pkt->flags = 0;
|
1068 |
/* keyframe computation */
|
1069 |
if (pc->key_frame == 1) |
1070 |
pkt->flags |= AV_PKT_FLAG_KEY; |
1071 |
else if (pc->key_frame == -1 && pc->pict_type == FF_I_TYPE) |
1072 |
pkt->flags |= AV_PKT_FLAG_KEY; |
1073 |
} |
1074 |
if (pc)
|
1075 |
pkt->convergence_duration = pc->convergence_duration; |
1076 |
} |
1077 |
|
1078 |
|
1079 |
static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
1080 |
{ |
1081 |
AVStream *st; |
1082 |
int len, ret, i;
|
1083 |
|
1084 |
av_init_packet(pkt); |
1085 |
|
1086 |
for(;;) {
|
1087 |
/* select current input stream component */
|
1088 |
st = s->cur_st; |
1089 |
if (st) {
|
1090 |
if (!st->need_parsing || !st->parser) {
|
1091 |
/* no parsing needed: we just output the packet as is */
|
1092 |
/* raw data support */
|
1093 |
*pkt = st->cur_pkt; st->cur_pkt.data= NULL;
|
1094 |
compute_pkt_fields(s, st, NULL, pkt);
|
1095 |
s->cur_st = NULL;
|
1096 |
if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
|
1097 |
(pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) { |
1098 |
ff_reduce_index(s, st->index); |
1099 |
av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME); |
1100 |
} |
1101 |
break;
|
1102 |
} else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) { |
1103 |
len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size, |
1104 |
st->cur_ptr, st->cur_len, |
1105 |
st->cur_pkt.pts, st->cur_pkt.dts, |
1106 |
st->cur_pkt.pos); |
1107 |
st->cur_pkt.pts = AV_NOPTS_VALUE; |
1108 |
st->cur_pkt.dts = AV_NOPTS_VALUE; |
1109 |
/* increment read pointer */
|
1110 |
st->cur_ptr += len; |
1111 |
st->cur_len -= len; |
1112 |
|
1113 |
/* return packet if any */
|
1114 |
if (pkt->size) {
|
1115 |
got_packet:
|
1116 |
pkt->duration = 0;
|
1117 |
pkt->stream_index = st->index; |
1118 |
pkt->pts = st->parser->pts; |
1119 |
pkt->dts = st->parser->dts; |
1120 |
pkt->pos = st->parser->pos; |
1121 |
if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
|
1122 |
s->cur_st = NULL;
|
1123 |
pkt->destruct= st->cur_pkt.destruct; |
1124 |
st->cur_pkt.destruct= NULL;
|
1125 |
st->cur_pkt.data = NULL;
|
1126 |
assert(st->cur_len == 0);
|
1127 |
}else{
|
1128 |
pkt->destruct = NULL;
|
1129 |
} |
1130 |
compute_pkt_fields(s, st, st->parser, pkt); |
1131 |
|
1132 |
if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
|
1133 |
ff_reduce_index(s, st->index); |
1134 |
av_add_index_entry(st, st->parser->frame_offset, pkt->dts, |
1135 |
0, 0, AVINDEX_KEYFRAME); |
1136 |
} |
1137 |
|
1138 |
break;
|
1139 |
} |
1140 |
} else {
|
1141 |
/* free packet */
|
1142 |
av_free_packet(&st->cur_pkt); |
1143 |
s->cur_st = NULL;
|
1144 |
} |
1145 |
} else {
|
1146 |
AVPacket cur_pkt; |
1147 |
/* read next packet */
|
1148 |
ret = av_read_packet(s, &cur_pkt); |
1149 |
if (ret < 0) { |
1150 |
if (ret == AVERROR(EAGAIN))
|
1151 |
return ret;
|
1152 |
/* return the last frames, if any */
|
1153 |
for(i = 0; i < s->nb_streams; i++) { |
1154 |
st = s->streams[i]; |
1155 |
if (st->parser && st->need_parsing) {
|
1156 |
av_parser_parse2(st->parser, st->codec, |
1157 |
&pkt->data, &pkt->size, |
1158 |
NULL, 0, |
1159 |
AV_NOPTS_VALUE, AV_NOPTS_VALUE, |
1160 |
AV_NOPTS_VALUE); |
1161 |
if (pkt->size)
|
1162 |
goto got_packet;
|
1163 |
} |
1164 |
} |
1165 |
/* no more packets: really terminate parsing */
|
1166 |
return ret;
|
1167 |
} |
1168 |
st = s->streams[cur_pkt.stream_index]; |
1169 |
st->cur_pkt= cur_pkt; |
1170 |
|
1171 |
if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
|
1172 |
st->cur_pkt.dts != AV_NOPTS_VALUE && |
1173 |
st->cur_pkt.pts < st->cur_pkt.dts){ |
1174 |
av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n", |
1175 |
st->cur_pkt.stream_index, |
1176 |
st->cur_pkt.pts, |
1177 |
st->cur_pkt.dts, |
1178 |
st->cur_pkt.size); |
1179 |
// av_free_packet(&st->cur_pkt);
|
1180 |
// return -1;
|
1181 |
} |
1182 |
|
1183 |
if(s->debug & FF_FDEBUG_TS)
|
1184 |
av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n", |
1185 |
st->cur_pkt.stream_index, |
1186 |
st->cur_pkt.pts, |
1187 |
st->cur_pkt.dts, |
1188 |
st->cur_pkt.size, |
1189 |
st->cur_pkt.duration, |
1190 |
st->cur_pkt.flags); |
1191 |
|
1192 |
s->cur_st = st; |
1193 |
st->cur_ptr = st->cur_pkt.data; |
1194 |
st->cur_len = st->cur_pkt.size; |
1195 |
if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
|
1196 |
st->parser = av_parser_init(st->codec->codec_id); |
1197 |
if (!st->parser) {
|
1198 |
/* no parser available: just output the raw packets */
|
1199 |
st->need_parsing = AVSTREAM_PARSE_NONE; |
1200 |
}else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){ |
1201 |
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
1202 |
}else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){ |
1203 |
st->parser->flags |= PARSER_FLAG_ONCE; |
1204 |
} |
1205 |
} |
1206 |
} |
1207 |
} |
1208 |
if(s->debug & FF_FDEBUG_TS)
|
1209 |
av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n", |
1210 |
pkt->stream_index, |
1211 |
pkt->pts, |
1212 |
pkt->dts, |
1213 |
pkt->size, |
1214 |
pkt->duration, |
1215 |
pkt->flags); |
1216 |
|
1217 |
return 0; |
1218 |
} |
1219 |
|
1220 |
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
|
1221 |
{ |
1222 |
AVPacketList *pktl; |
1223 |
int eof=0; |
1224 |
const int genpts= s->flags & AVFMT_FLAG_GENPTS; |
1225 |
|
1226 |
for(;;){
|
1227 |
pktl = s->packet_buffer; |
1228 |
if (pktl) {
|
1229 |
AVPacket *next_pkt= &pktl->pkt; |
1230 |
|
1231 |
if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
|
1232 |
int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
|
1233 |
while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
|
1234 |
if( pktl->pkt.stream_index == next_pkt->stream_index
|
1235 |
&& (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) |
1236 |
&& av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame |
1237 |
next_pkt->pts= pktl->pkt.dts; |
1238 |
} |
1239 |
pktl= pktl->next; |
1240 |
} |
1241 |
pktl = s->packet_buffer; |
1242 |
} |
1243 |
|
1244 |
if( next_pkt->pts != AV_NOPTS_VALUE
|
1245 |
|| next_pkt->dts == AV_NOPTS_VALUE |
1246 |
|| !genpts || eof){ |
1247 |
/* read packet from packet buffer, if there is data */
|
1248 |
*pkt = *next_pkt; |
1249 |
s->packet_buffer = pktl->next; |
1250 |
av_free(pktl); |
1251 |
return 0; |
1252 |
} |
1253 |
} |
1254 |
if(genpts){
|
1255 |
int ret= av_read_frame_internal(s, pkt);
|
1256 |
if(ret<0){ |
1257 |
if(pktl && ret != AVERROR(EAGAIN)){
|
1258 |
eof=1;
|
1259 |
continue;
|
1260 |
}else
|
1261 |
return ret;
|
1262 |
} |
1263 |
|
1264 |
if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
|
1265 |
&s->packet_buffer_end)) < 0)
|
1266 |
return AVERROR(ENOMEM);
|
1267 |
}else{
|
1268 |
assert(!s->packet_buffer); |
1269 |
return av_read_frame_internal(s, pkt);
|
1270 |
} |
1271 |
} |
1272 |
} |
1273 |
|
1274 |
/* XXX: suppress the packet queue */
|
1275 |
static void flush_packet_queue(AVFormatContext *s) |
1276 |
{ |
1277 |
AVPacketList *pktl; |
1278 |
|
1279 |
for(;;) {
|
1280 |
pktl = s->packet_buffer; |
1281 |
if (!pktl)
|
1282 |
break;
|
1283 |
s->packet_buffer = pktl->next; |
1284 |
av_free_packet(&pktl->pkt); |
1285 |
av_free(pktl); |
1286 |
} |
1287 |
while(s->raw_packet_buffer){
|
1288 |
pktl = s->raw_packet_buffer; |
1289 |
s->raw_packet_buffer = pktl->next; |
1290 |
av_free_packet(&pktl->pkt); |
1291 |
av_free(pktl); |
1292 |
} |
1293 |
s->packet_buffer_end= |
1294 |
s->raw_packet_buffer_end= NULL;
|
1295 |
s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
1296 |
} |
1297 |
|
1298 |
/*******************************************************/
|
1299 |
/* seek support */
|
1300 |
|
1301 |
int av_find_default_stream_index(AVFormatContext *s)
|
1302 |
{ |
1303 |
int first_audio_index = -1; |
1304 |
int i;
|
1305 |
AVStream *st; |
1306 |
|
1307 |
if (s->nb_streams <= 0) |
1308 |
return -1; |
1309 |
for(i = 0; i < s->nb_streams; i++) { |
1310 |
st = s->streams[i]; |
1311 |
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
1312 |
return i;
|
1313 |
} |
1314 |
if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
1315 |
first_audio_index = i; |
1316 |
} |
1317 |
return first_audio_index >= 0 ? first_audio_index : 0; |
1318 |
} |
1319 |
|
1320 |
/**
|
1321 |
* Flush the frame reader.
|
1322 |
*/
|
1323 |
void ff_read_frame_flush(AVFormatContext *s)
|
1324 |
{ |
1325 |
AVStream *st; |
1326 |
int i, j;
|
1327 |
|
1328 |
flush_packet_queue(s); |
1329 |
|
1330 |
s->cur_st = NULL;
|
1331 |
|
1332 |
/* for each stream, reset read state */
|
1333 |
for(i = 0; i < s->nb_streams; i++) { |
1334 |
st = s->streams[i]; |
1335 |
|
1336 |
if (st->parser) {
|
1337 |
av_parser_close(st->parser); |
1338 |
st->parser = NULL;
|
1339 |
av_free_packet(&st->cur_pkt); |
1340 |
} |
1341 |
st->last_IP_pts = AV_NOPTS_VALUE; |
1342 |
st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
|
1343 |
st->reference_dts = AV_NOPTS_VALUE; |
1344 |
/* fail safe */
|
1345 |
st->cur_ptr = NULL;
|
1346 |
st->cur_len = 0;
|
1347 |
|
1348 |
st->probe_packets = MAX_PROBE_PACKETS; |
1349 |
|
1350 |
for(j=0; j<MAX_REORDER_DELAY+1; j++) |
1351 |
st->pts_buffer[j]= AV_NOPTS_VALUE; |
1352 |
} |
1353 |
} |
1354 |
|
1355 |
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
|
1356 |
int i;
|
1357 |
|
1358 |
for(i = 0; i < s->nb_streams; i++) { |
1359 |
AVStream *st = s->streams[i]; |
1360 |
|
1361 |
st->cur_dts = av_rescale(timestamp, |
1362 |
st->time_base.den * (int64_t)ref_st->time_base.num, |
1363 |
st->time_base.num * (int64_t)ref_st->time_base.den); |
1364 |
} |
1365 |
} |
1366 |
|
1367 |
void ff_reduce_index(AVFormatContext *s, int stream_index) |
1368 |
{ |
1369 |
AVStream *st= s->streams[stream_index]; |
1370 |
unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry); |
1371 |
|
1372 |
if((unsigned)st->nb_index_entries >= max_entries){ |
1373 |
int i;
|
1374 |
for(i=0; 2*i<st->nb_index_entries; i++) |
1375 |
st->index_entries[i]= st->index_entries[2*i];
|
1376 |
st->nb_index_entries= i; |
1377 |
} |
1378 |
} |
1379 |
|
1380 |
int ff_add_index_entry(AVIndexEntry **index_entries,
|
1381 |
int *nb_index_entries,
|
1382 |
unsigned int *index_entries_allocated_size, |
1383 |
int64_t pos, int64_t timestamp, int size, int distance, int flags) |
1384 |
{ |
1385 |
AVIndexEntry *entries, *ie; |
1386 |
int index;
|
1387 |
|
1388 |
if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) |
1389 |
return -1; |
1390 |
|
1391 |
entries = av_fast_realloc(*index_entries, |
1392 |
index_entries_allocated_size, |
1393 |
(*nb_index_entries + 1) *
|
1394 |
sizeof(AVIndexEntry));
|
1395 |
if(!entries)
|
1396 |
return -1; |
1397 |
|
1398 |
*index_entries= entries; |
1399 |
|
1400 |
index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY); |
1401 |
|
1402 |
if(index<0){ |
1403 |
index= (*nb_index_entries)++; |
1404 |
ie= &entries[index]; |
1405 |
assert(index==0 || ie[-1].timestamp < timestamp); |
1406 |
}else{
|
1407 |
ie= &entries[index]; |
1408 |
if(ie->timestamp != timestamp){
|
1409 |
if(ie->timestamp <= timestamp)
|
1410 |
return -1; |
1411 |
memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index)); |
1412 |
(*nb_index_entries)++; |
1413 |
}else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance |
1414 |
distance= ie->min_distance; |
1415 |
} |
1416 |
|
1417 |
ie->pos = pos; |
1418 |
ie->timestamp = timestamp; |
1419 |
ie->min_distance= distance; |
1420 |
ie->size= size; |
1421 |
ie->flags = flags; |
1422 |
|
1423 |
return index;
|
1424 |
} |
1425 |
|
1426 |
int av_add_index_entry(AVStream *st,
|
1427 |
int64_t pos, int64_t timestamp, int size, int distance, int flags) |
1428 |
{ |
1429 |
return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
|
1430 |
&st->index_entries_allocated_size, pos, |
1431 |
timestamp, size, distance, flags); |
1432 |
} |
1433 |
|
1434 |
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, |
1435 |
int64_t wanted_timestamp, int flags)
|
1436 |
{ |
1437 |
int a, b, m;
|
1438 |
int64_t timestamp; |
1439 |
|
1440 |
a = - 1;
|
1441 |
b = nb_entries; |
1442 |
|
1443 |
//optimize appending index entries at the end
|
1444 |
if(b && entries[b-1].timestamp < wanted_timestamp) |
1445 |
a= b-1;
|
1446 |
|
1447 |
while (b - a > 1) { |
1448 |
m = (a + b) >> 1;
|
1449 |
timestamp = entries[m].timestamp; |
1450 |
if(timestamp >= wanted_timestamp)
|
1451 |
b = m; |
1452 |
if(timestamp <= wanted_timestamp)
|
1453 |
a = m; |
1454 |
} |
1455 |
m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b; |
1456 |
|
1457 |
if(!(flags & AVSEEK_FLAG_ANY)){
|
1458 |
while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){ |
1459 |
m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; |
1460 |
} |
1461 |
} |
1462 |
|
1463 |
if(m == nb_entries)
|
1464 |
return -1; |
1465 |
return m;
|
1466 |
} |
1467 |
|
1468 |
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
|
1469 |
int flags)
|
1470 |
{ |
1471 |
return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
|
1472 |
wanted_timestamp, flags); |
1473 |
} |
1474 |
|
1475 |
#define DEBUG_SEEK
|
1476 |
|
1477 |
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){ |
1478 |
AVInputFormat *avif= s->iformat; |
1479 |
int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit; |
1480 |
int64_t ts_min, ts_max, ts; |
1481 |
int index;
|
1482 |
int64_t ret; |
1483 |
AVStream *st; |
1484 |
|
1485 |
if (stream_index < 0) |
1486 |
return -1; |
1487 |
|
1488 |
#ifdef DEBUG_SEEK
|
1489 |
av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts); |
1490 |
#endif
|
1491 |
|
1492 |
ts_max= |
1493 |
ts_min= AV_NOPTS_VALUE; |
1494 |
pos_limit= -1; //gcc falsely says it may be uninitialized |
1495 |
|
1496 |
st= s->streams[stream_index]; |
1497 |
if(st->index_entries){
|
1498 |
AVIndexEntry *e; |
1499 |
|
1500 |
index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp()
|
1501 |
index= FFMAX(index, 0);
|
1502 |
e= &st->index_entries[index]; |
1503 |
|
1504 |
if(e->timestamp <= target_ts || e->pos == e->min_distance){
|
1505 |
pos_min= e->pos; |
1506 |
ts_min= e->timestamp; |
1507 |
#ifdef DEBUG_SEEK
|
1508 |
av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n", |
1509 |
pos_min,ts_min); |
1510 |
#endif
|
1511 |
}else{
|
1512 |
assert(index==0);
|
1513 |
} |
1514 |
|
1515 |
index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD); |
1516 |
assert(index < st->nb_index_entries); |
1517 |
if(index >= 0){ |
1518 |
e= &st->index_entries[index]; |
1519 |
assert(e->timestamp >= target_ts); |
1520 |
pos_max= e->pos; |
1521 |
ts_max= e->timestamp; |
1522 |
pos_limit= pos_max - e->min_distance; |
1523 |
#ifdef DEBUG_SEEK
|
1524 |
av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n", |
1525 |
pos_max,pos_limit, ts_max); |
1526 |
#endif
|
1527 |
} |
1528 |
} |
1529 |
|
1530 |
pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp); |
1531 |
if(pos<0) |
1532 |
return -1; |
1533 |
|
1534 |
/* do the seek */
|
1535 |
if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0) |
1536 |
return ret;
|
1537 |
|
1538 |
av_update_cur_dts(s, st, ts); |
1539 |
|
1540 |
return 0; |
1541 |
} |
1542 |
|
1543 |
int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){ |
1544 |
int64_t pos, ts; |
1545 |
int64_t start_pos, filesize; |
1546 |
int no_change;
|
1547 |
|
1548 |
#ifdef DEBUG_SEEK
|
1549 |
av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts); |
1550 |
#endif
|
1551 |
|
1552 |
if(ts_min == AV_NOPTS_VALUE){
|
1553 |
pos_min = s->data_offset; |
1554 |
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
1555 |
if (ts_min == AV_NOPTS_VALUE)
|
1556 |
return -1; |
1557 |
} |
1558 |
|
1559 |
if(ts_max == AV_NOPTS_VALUE){
|
1560 |
int step= 1024; |
1561 |
filesize = avio_size(s->pb); |
1562 |
pos_max = filesize - 1;
|
1563 |
do{
|
1564 |
pos_max -= step; |
1565 |
ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step); |
1566 |
step += step; |
1567 |
}while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
|
1568 |
if (ts_max == AV_NOPTS_VALUE)
|
1569 |
return -1; |
1570 |
|
1571 |
for(;;){
|
1572 |
int64_t tmp_pos= pos_max + 1;
|
1573 |
int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX); |
1574 |
if(tmp_ts == AV_NOPTS_VALUE)
|
1575 |
break;
|
1576 |
ts_max= tmp_ts; |
1577 |
pos_max= tmp_pos; |
1578 |
if(tmp_pos >= filesize)
|
1579 |
break;
|
1580 |
} |
1581 |
pos_limit= pos_max; |
1582 |
} |
1583 |
|
1584 |
if(ts_min > ts_max){
|
1585 |
return -1; |
1586 |
}else if(ts_min == ts_max){ |
1587 |
pos_limit= pos_min; |
1588 |
} |
1589 |
|
1590 |
no_change=0;
|
1591 |
while (pos_min < pos_limit) {
|
1592 |
#ifdef DEBUG_SEEK
|
1593 |
av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n", |
1594 |
pos_min, pos_max, |
1595 |
ts_min, ts_max); |
1596 |
#endif
|
1597 |
assert(pos_limit <= pos_max); |
1598 |
|
1599 |
if(no_change==0){ |
1600 |
int64_t approximate_keyframe_distance= pos_max - pos_limit; |
1601 |
// interpolate position (better than dichotomy)
|
1602 |
pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min) |
1603 |
+ pos_min - approximate_keyframe_distance; |
1604 |
}else if(no_change==1){ |
1605 |
// bisection, if interpolation failed to change min or max pos last time
|
1606 |
pos = (pos_min + pos_limit)>>1;
|
1607 |
}else{
|
1608 |
/* linear search if bisection failed, can only happen if there
|
1609 |
are very few or no keyframes between min/max */
|
1610 |
pos=pos_min; |
1611 |
} |
1612 |
if(pos <= pos_min)
|
1613 |
pos= pos_min + 1;
|
1614 |
else if(pos > pos_limit) |
1615 |
pos= pos_limit; |
1616 |
start_pos= pos; |
1617 |
|
1618 |
ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
|
1619 |
if(pos == pos_max)
|
1620 |
no_change++; |
1621 |
else
|
1622 |
no_change=0;
|
1623 |
#ifdef DEBUG_SEEK
|
1624 |
av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", |
1625 |
pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit, |
1626 |
start_pos, no_change); |
1627 |
#endif
|
1628 |
if(ts == AV_NOPTS_VALUE){
|
1629 |
av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
|
1630 |
return -1; |
1631 |
} |
1632 |
assert(ts != AV_NOPTS_VALUE); |
1633 |
if (target_ts <= ts) {
|
1634 |
pos_limit = start_pos - 1;
|
1635 |
pos_max = pos; |
1636 |
ts_max = ts; |
1637 |
} |
1638 |
if (target_ts >= ts) {
|
1639 |
pos_min = pos; |
1640 |
ts_min = ts; |
1641 |
} |
1642 |
} |
1643 |
|
1644 |
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
1645 |
ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; |
1646 |
#ifdef DEBUG_SEEK
|
1647 |
pos_min = pos; |
1648 |
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
1649 |
pos_min++; |
1650 |
ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
1651 |
av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n", |
1652 |
pos, ts_min, target_ts, ts_max); |
1653 |
#endif
|
1654 |
*ts_ret= ts; |
1655 |
return pos;
|
1656 |
} |
1657 |
|
1658 |
static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){ |
1659 |
int64_t pos_min, pos_max; |
1660 |
#if 0
|
1661 |
AVStream *st;
|
1662 |
|
1663 |
if (stream_index < 0)
|
1664 |
return -1;
|
1665 |
|
1666 |
st= s->streams[stream_index];
|
1667 |
#endif
|
1668 |
|
1669 |
pos_min = s->data_offset; |
1670 |
pos_max = avio_size(s->pb) - 1;
|
1671 |
|
1672 |
if (pos < pos_min) pos= pos_min;
|
1673 |
else if(pos > pos_max) pos= pos_max; |
1674 |
|
1675 |
avio_seek(s->pb, pos, SEEK_SET); |
1676 |
|
1677 |
#if 0
|
1678 |
av_update_cur_dts(s, st, ts);
|
1679 |
#endif
|
1680 |
return 0; |
1681 |
} |
1682 |
|
1683 |
static int av_seek_frame_generic(AVFormatContext *s, |
1684 |
int stream_index, int64_t timestamp, int flags) |
1685 |
{ |
1686 |
int index;
|
1687 |
int64_t ret; |
1688 |
AVStream *st; |
1689 |
AVIndexEntry *ie; |
1690 |
|
1691 |
st = s->streams[stream_index]; |
1692 |
|
1693 |
index = av_index_search_timestamp(st, timestamp, flags); |
1694 |
|
1695 |
if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp) |
1696 |
return -1; |
1697 |
|
1698 |
if(index < 0 || index==st->nb_index_entries-1){ |
1699 |
int i;
|
1700 |
AVPacket pkt; |
1701 |
|
1702 |
if(st->nb_index_entries){
|
1703 |
assert(st->index_entries); |
1704 |
ie= &st->index_entries[st->nb_index_entries-1];
|
1705 |
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
1706 |
return ret;
|
1707 |
av_update_cur_dts(s, st, ie->timestamp); |
1708 |
}else{
|
1709 |
if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0) |
1710 |
return ret;
|
1711 |
} |
1712 |
for(i=0;; i++) { |
1713 |
int ret;
|
1714 |
do{
|
1715 |
ret = av_read_frame(s, &pkt); |
1716 |
}while(ret == AVERROR(EAGAIN));
|
1717 |
if(ret<0) |
1718 |
break;
|
1719 |
av_free_packet(&pkt); |
1720 |
if(stream_index == pkt.stream_index){
|
1721 |
if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
|
1722 |
break;
|
1723 |
} |
1724 |
} |
1725 |
index = av_index_search_timestamp(st, timestamp, flags); |
1726 |
} |
1727 |
if (index < 0) |
1728 |
return -1; |
1729 |
|
1730 |
ff_read_frame_flush(s); |
1731 |
if (s->iformat->read_seek){
|
1732 |
if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) |
1733 |
return 0; |
1734 |
} |
1735 |
ie = &st->index_entries[index]; |
1736 |
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
1737 |
return ret;
|
1738 |
av_update_cur_dts(s, st, ie->timestamp); |
1739 |
|
1740 |
return 0; |
1741 |
} |
1742 |
|
1743 |
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
1744 |
{ |
1745 |
int ret;
|
1746 |
AVStream *st; |
1747 |
|
1748 |
ff_read_frame_flush(s); |
1749 |
|
1750 |
if(flags & AVSEEK_FLAG_BYTE)
|
1751 |
return av_seek_frame_byte(s, stream_index, timestamp, flags);
|
1752 |
|
1753 |
if(stream_index < 0){ |
1754 |
stream_index= av_find_default_stream_index(s); |
1755 |
if(stream_index < 0) |
1756 |
return -1; |
1757 |
|
1758 |
st= s->streams[stream_index]; |
1759 |
/* timestamp for default must be expressed in AV_TIME_BASE units */
|
1760 |
timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num); |
1761 |
} |
1762 |
|
1763 |
/* first, we try the format specific seek */
|
1764 |
if (s->iformat->read_seek)
|
1765 |
ret = s->iformat->read_seek(s, stream_index, timestamp, flags); |
1766 |
else
|
1767 |
ret = -1;
|
1768 |
if (ret >= 0) { |
1769 |
return 0; |
1770 |
} |
1771 |
|
1772 |
if(s->iformat->read_timestamp)
|
1773 |
return av_seek_frame_binary(s, stream_index, timestamp, flags);
|
1774 |
else
|
1775 |
return av_seek_frame_generic(s, stream_index, timestamp, flags);
|
1776 |
} |
1777 |
|
1778 |
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags) |
1779 |
{ |
1780 |
if(min_ts > ts || max_ts < ts)
|
1781 |
return -1; |
1782 |
|
1783 |
ff_read_frame_flush(s); |
1784 |
|
1785 |
if (s->iformat->read_seek2)
|
1786 |
return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
|
1787 |
|
1788 |
if(s->iformat->read_timestamp){
|
1789 |
//try to seek via read_timestamp()
|
1790 |
} |
1791 |
|
1792 |
//Fallback to old API if new is not implemented but old is
|
1793 |
//Note the old has somewat different sematics
|
1794 |
if(s->iformat->read_seek || 1) |
1795 |
return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0)); |
1796 |
|
1797 |
// try some generic seek like av_seek_frame_generic() but with new ts semantics
|
1798 |
} |
1799 |
|
1800 |
/*******************************************************/
|
1801 |
|
1802 |
/**
|
1803 |
* Return TRUE if the stream has accurate duration in any stream.
|
1804 |
*
|
1805 |
* @return TRUE if the stream has accurate duration for at least one component.
|
1806 |
*/
|
1807 |
static int av_has_duration(AVFormatContext *ic) |
1808 |
{ |
1809 |
int i;
|
1810 |
AVStream *st; |
1811 |
|
1812 |
for(i = 0;i < ic->nb_streams; i++) { |
1813 |
st = ic->streams[i]; |
1814 |
if (st->duration != AV_NOPTS_VALUE)
|
1815 |
return 1; |
1816 |
} |
1817 |
return 0; |
1818 |
} |
1819 |
|
1820 |
/**
|
1821 |
* Estimate the stream timings from the one of each components.
|
1822 |
*
|
1823 |
* Also computes the global bitrate if possible.
|
1824 |
*/
|
1825 |
static void av_update_stream_timings(AVFormatContext *ic) |
1826 |
{ |
1827 |
int64_t start_time, start_time1, end_time, end_time1; |
1828 |
int64_t duration, duration1; |
1829 |
int i;
|
1830 |
AVStream *st; |
1831 |
|
1832 |
start_time = INT64_MAX; |
1833 |
end_time = INT64_MIN; |
1834 |
duration = INT64_MIN; |
1835 |
for(i = 0;i < ic->nb_streams; i++) { |
1836 |
st = ic->streams[i]; |
1837 |
if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
|
1838 |
start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q); |
1839 |
if (start_time1 < start_time)
|
1840 |
start_time = start_time1; |
1841 |
if (st->duration != AV_NOPTS_VALUE) {
|
1842 |
end_time1 = start_time1 |
1843 |
+ av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
1844 |
if (end_time1 > end_time)
|
1845 |
end_time = end_time1; |
1846 |
} |
1847 |
} |
1848 |
if (st->duration != AV_NOPTS_VALUE) {
|
1849 |
duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
1850 |
if (duration1 > duration)
|
1851 |
duration = duration1; |
1852 |
} |
1853 |
} |
1854 |
if (start_time != INT64_MAX) {
|
1855 |
ic->start_time = start_time; |
1856 |
if (end_time != INT64_MIN) {
|
1857 |
if (end_time - start_time > duration)
|
1858 |
duration = end_time - start_time; |
1859 |
} |
1860 |
} |
1861 |
if (duration != INT64_MIN) {
|
1862 |
ic->duration = duration; |
1863 |
if (ic->file_size > 0) { |
1864 |
/* compute the bitrate */
|
1865 |
ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE / |
1866 |
(double)ic->duration;
|
1867 |
} |
1868 |
} |
1869 |
} |
1870 |
|
1871 |
static void fill_all_stream_timings(AVFormatContext *ic) |
1872 |
{ |
1873 |
int i;
|
1874 |
AVStream *st; |
1875 |
|
1876 |
av_update_stream_timings(ic); |
1877 |
for(i = 0;i < ic->nb_streams; i++) { |
1878 |
st = ic->streams[i]; |
1879 |
if (st->start_time == AV_NOPTS_VALUE) {
|
1880 |
if(ic->start_time != AV_NOPTS_VALUE)
|
1881 |
st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base); |
1882 |
if(ic->duration != AV_NOPTS_VALUE)
|
1883 |
st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base); |
1884 |
} |
1885 |
} |
1886 |
} |
1887 |
|
1888 |
static void av_estimate_timings_from_bit_rate(AVFormatContext *ic) |
1889 |
{ |
1890 |
int64_t filesize, duration; |
1891 |
int bit_rate, i;
|
1892 |
AVStream *st; |
1893 |
|
1894 |
/* if bit_rate is already set, we believe it */
|
1895 |
if (ic->bit_rate <= 0) { |
1896 |
bit_rate = 0;
|
1897 |
for(i=0;i<ic->nb_streams;i++) { |
1898 |
st = ic->streams[i]; |
1899 |
if (st->codec->bit_rate > 0) |
1900 |
bit_rate += st->codec->bit_rate; |
1901 |
} |
1902 |
ic->bit_rate = bit_rate; |
1903 |
} |
1904 |
|
1905 |
/* if duration is already set, we believe it */
|
1906 |
if (ic->duration == AV_NOPTS_VALUE &&
|
1907 |
ic->bit_rate != 0 &&
|
1908 |
ic->file_size != 0) {
|
1909 |
filesize = ic->file_size; |
1910 |
if (filesize > 0) { |
1911 |
for(i = 0; i < ic->nb_streams; i++) { |
1912 |
st = ic->streams[i]; |
1913 |
duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
|
1914 |
if (st->duration == AV_NOPTS_VALUE)
|
1915 |
st->duration = duration; |
1916 |
} |
1917 |
} |
1918 |
} |
1919 |
} |
1920 |
|
1921 |
#define DURATION_MAX_READ_SIZE 250000 |
1922 |
#define DURATION_MAX_RETRY 3 |
1923 |
|
1924 |
/* only usable for MPEG-PS streams */
|
1925 |
static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) |
1926 |
{ |
1927 |
AVPacket pkt1, *pkt = &pkt1; |
1928 |
AVStream *st; |
1929 |
int read_size, i, ret;
|
1930 |
int64_t end_time; |
1931 |
int64_t filesize, offset, duration; |
1932 |
int retry=0; |
1933 |
|
1934 |
ic->cur_st = NULL;
|
1935 |
|
1936 |
/* flush packet queue */
|
1937 |
flush_packet_queue(ic); |
1938 |
|
1939 |
for (i=0; i<ic->nb_streams; i++) { |
1940 |
st = ic->streams[i]; |
1941 |
if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
|
1942 |
av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
|
1943 |
|
1944 |
if (st->parser) {
|
1945 |
av_parser_close(st->parser); |
1946 |
st->parser= NULL;
|
1947 |
av_free_packet(&st->cur_pkt); |
1948 |
} |
1949 |
} |
1950 |
|
1951 |
/* estimate the end time (duration) */
|
1952 |
/* XXX: may need to support wrapping */
|
1953 |
filesize = ic->file_size; |
1954 |
end_time = AV_NOPTS_VALUE; |
1955 |
do{
|
1956 |
offset = filesize - (DURATION_MAX_READ_SIZE<<retry); |
1957 |
if (offset < 0) |
1958 |
offset = 0;
|
1959 |
|
1960 |
avio_seek(ic->pb, offset, SEEK_SET); |
1961 |
read_size = 0;
|
1962 |
for(;;) {
|
1963 |
if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0))) |
1964 |
break;
|
1965 |
|
1966 |
do{
|
1967 |
ret = av_read_packet(ic, pkt); |
1968 |
}while(ret == AVERROR(EAGAIN));
|
1969 |
if (ret != 0) |
1970 |
break;
|
1971 |
read_size += pkt->size; |
1972 |
st = ic->streams[pkt->stream_index]; |
1973 |
if (pkt->pts != AV_NOPTS_VALUE &&
|
1974 |
(st->start_time != AV_NOPTS_VALUE || |
1975 |
st->first_dts != AV_NOPTS_VALUE)) { |
1976 |
duration = end_time = pkt->pts; |
1977 |
if (st->start_time != AV_NOPTS_VALUE) duration -= st->start_time;
|
1978 |
else duration -= st->first_dts;
|
1979 |
if (duration < 0) |
1980 |
duration += 1LL<<st->pts_wrap_bits;
|
1981 |
if (duration > 0) { |
1982 |
if (st->duration == AV_NOPTS_VALUE ||
|
1983 |
st->duration < duration) |
1984 |
st->duration = duration; |
1985 |
} |
1986 |
} |
1987 |
av_free_packet(pkt); |
1988 |
} |
1989 |
}while( end_time==AV_NOPTS_VALUE
|
1990 |
&& filesize > (DURATION_MAX_READ_SIZE<<retry) |
1991 |
&& ++retry <= DURATION_MAX_RETRY); |
1992 |
|
1993 |
fill_all_stream_timings(ic); |
1994 |
|
1995 |
avio_seek(ic->pb, old_offset, SEEK_SET); |
1996 |
for (i=0; i<ic->nb_streams; i++) { |
1997 |
st= ic->streams[i]; |
1998 |
st->cur_dts= st->first_dts; |
1999 |
st->last_IP_pts = AV_NOPTS_VALUE; |
2000 |
} |
2001 |
} |
2002 |
|
2003 |
static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset) |
2004 |
{ |
2005 |
int64_t file_size; |
2006 |
|
2007 |
/* get the file size, if possible */
|
2008 |
if (ic->iformat->flags & AVFMT_NOFILE) {
|
2009 |
file_size = 0;
|
2010 |
} else {
|
2011 |
file_size = avio_size(ic->pb); |
2012 |
if (file_size < 0) |
2013 |
file_size = 0;
|
2014 |
} |
2015 |
ic->file_size = file_size; |
2016 |
|
2017 |
if ((!strcmp(ic->iformat->name, "mpeg") || |
2018 |
!strcmp(ic->iformat->name, "mpegts")) &&
|
2019 |
file_size && !url_is_streamed(ic->pb)) { |
2020 |
/* get accurate estimate from the PTSes */
|
2021 |
av_estimate_timings_from_pts(ic, old_offset); |
2022 |
} else if (av_has_duration(ic)) { |
2023 |
/* at least one component has timings - we use them for all
|
2024 |
the components */
|
2025 |
fill_all_stream_timings(ic); |
2026 |
} else {
|
2027 |
av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
|
2028 |
/* less precise: use bitrate info */
|
2029 |
av_estimate_timings_from_bit_rate(ic); |
2030 |
} |
2031 |
av_update_stream_timings(ic); |
2032 |
|
2033 |
#if 0
|
2034 |
{
|
2035 |
int i;
|
2036 |
AVStream *st;
|
2037 |
for(i = 0;i < ic->nb_streams; i++) {
|
2038 |
st = ic->streams[i];
|
2039 |
printf("%d: start_time: %0.3f duration: %0.3f\n",
|
2040 |
i, (double)st->start_time / AV_TIME_BASE,
|
2041 |
(double)st->duration / AV_TIME_BASE);
|
2042 |
}
|
2043 |
printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
|
2044 |
(double)ic->start_time / AV_TIME_BASE,
|
2045 |
(double)ic->duration / AV_TIME_BASE,
|
2046 |
ic->bit_rate / 1000);
|
2047 |
}
|
2048 |
#endif
|
2049 |
} |
2050 |
|
2051 |
static int has_codec_parameters(AVCodecContext *enc) |
2052 |
{ |
2053 |
int val;
|
2054 |
switch(enc->codec_type) {
|
2055 |
case AVMEDIA_TYPE_AUDIO:
|
2056 |
val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE; |
2057 |
if(!enc->frame_size &&
|
2058 |
(enc->codec_id == CODEC_ID_VORBIS || |
2059 |
enc->codec_id == CODEC_ID_AAC || |
2060 |
enc->codec_id == CODEC_ID_MP1 || |
2061 |
enc->codec_id == CODEC_ID_MP2 || |
2062 |
enc->codec_id == CODEC_ID_MP3 || |
2063 |
enc->codec_id == CODEC_ID_SPEEX)) |
2064 |
return 0; |
2065 |
break;
|
2066 |
case AVMEDIA_TYPE_VIDEO:
|
2067 |
val = enc->width && enc->pix_fmt != PIX_FMT_NONE; |
2068 |
break;
|
2069 |
default:
|
2070 |
val = 1;
|
2071 |
break;
|
2072 |
} |
2073 |
return enc->codec_id != CODEC_ID_NONE && val != 0; |
2074 |
} |
2075 |
|
2076 |
static int has_decode_delay_been_guessed(AVStream *st) |
2077 |
{ |
2078 |
return st->codec->codec_id != CODEC_ID_H264 ||
|
2079 |
st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
|
2080 |
} |
2081 |
|
2082 |
static int try_decode_frame(AVStream *st, AVPacket *avpkt) |
2083 |
{ |
2084 |
int16_t *samples; |
2085 |
AVCodec *codec; |
2086 |
int got_picture, data_size, ret=0; |
2087 |
AVFrame picture; |
2088 |
|
2089 |
if(!st->codec->codec){
|
2090 |
codec = avcodec_find_decoder(st->codec->codec_id); |
2091 |
if (!codec)
|
2092 |
return -1; |
2093 |
ret = avcodec_open(st->codec, codec); |
2094 |
if (ret < 0) |
2095 |
return ret;
|
2096 |
} |
2097 |
|
2098 |
if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
|
2099 |
switch(st->codec->codec_type) {
|
2100 |
case AVMEDIA_TYPE_VIDEO:
|
2101 |
avcodec_get_frame_defaults(&picture); |
2102 |
ret = avcodec_decode_video2(st->codec, &picture, |
2103 |
&got_picture, avpkt); |
2104 |
break;
|
2105 |
case AVMEDIA_TYPE_AUDIO:
|
2106 |
data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE); |
2107 |
samples = av_malloc(data_size); |
2108 |
if (!samples)
|
2109 |
goto fail;
|
2110 |
ret = avcodec_decode_audio3(st->codec, samples, |
2111 |
&data_size, avpkt); |
2112 |
av_free(samples); |
2113 |
break;
|
2114 |
default:
|
2115 |
break;
|
2116 |
} |
2117 |
} |
2118 |
fail:
|
2119 |
return ret;
|
2120 |
} |
2121 |
|
2122 |
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id) |
2123 |
{ |
2124 |
while (tags->id != CODEC_ID_NONE) {
|
2125 |
if (tags->id == id)
|
2126 |
return tags->tag;
|
2127 |
tags++; |
2128 |
} |
2129 |
return 0; |
2130 |
} |
2131 |
|
2132 |
enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag) |
2133 |
{ |
2134 |
int i;
|
2135 |
for(i=0; tags[i].id != CODEC_ID_NONE;i++) { |
2136 |
if(tag == tags[i].tag)
|
2137 |
return tags[i].id;
|
2138 |
} |
2139 |
for(i=0; tags[i].id != CODEC_ID_NONE; i++) { |
2140 |
if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
|
2141 |
return tags[i].id;
|
2142 |
} |
2143 |
return CODEC_ID_NONE;
|
2144 |
} |
2145 |
|
2146 |
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id) |
2147 |
{ |
2148 |
int i;
|
2149 |
for(i=0; tags && tags[i]; i++){ |
2150 |
int tag= ff_codec_get_tag(tags[i], id);
|
2151 |
if(tag) return tag; |
2152 |
} |
2153 |
return 0; |
2154 |
} |
2155 |
|
2156 |
enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag) |
2157 |
{ |
2158 |
int i;
|
2159 |
for(i=0; tags && tags[i]; i++){ |
2160 |
enum CodecID id= ff_codec_get_id(tags[i], tag);
|
2161 |
if(id!=CODEC_ID_NONE) return id; |
2162 |
} |
2163 |
return CODEC_ID_NONE;
|
2164 |
} |
2165 |
|
2166 |
static void compute_chapters_end(AVFormatContext *s) |
2167 |
{ |
2168 |
unsigned int i; |
2169 |
|
2170 |
for (i=0; i+1<s->nb_chapters; i++) |
2171 |
if (s->chapters[i]->end == AV_NOPTS_VALUE) {
|
2172 |
assert(s->chapters[i]->start <= s->chapters[i+1]->start);
|
2173 |
assert(!av_cmp_q(s->chapters[i]->time_base, s->chapters[i+1]->time_base));
|
2174 |
s->chapters[i]->end = s->chapters[i+1]->start;
|
2175 |
} |
2176 |
|
2177 |
if (s->nb_chapters && s->chapters[i]->end == AV_NOPTS_VALUE) {
|
2178 |
assert(s->start_time != AV_NOPTS_VALUE); |
2179 |
assert(s->duration > 0);
|
2180 |
s->chapters[i]->end = av_rescale_q(s->start_time + s->duration, |
2181 |
AV_TIME_BASE_Q, |
2182 |
s->chapters[i]->time_base); |
2183 |
} |
2184 |
} |
2185 |
|
2186 |
static int get_std_framerate(int i){ |
2187 |
if(i<60*12) return i*1001; |
2188 |
else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12; |
2189 |
} |
2190 |
|
2191 |
/*
|
2192 |
* Is the time base unreliable.
|
2193 |
* This is a heuristic to balance between quick acceptance of the values in
|
2194 |
* the headers vs. some extra checks.
|
2195 |
* Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
|
2196 |
* MPEG-2 commonly misuses field repeat flags to store different framerates.
|
2197 |
* And there are "variable" fps files this needs to detect as well.
|
2198 |
*/
|
2199 |
static int tb_unreliable(AVCodecContext *c){ |
2200 |
if( c->time_base.den >= 101L*c->time_base.num |
2201 |
|| c->time_base.den < 5L*c->time_base.num
|
2202 |
/* || c->codec_tag == AV_RL32("DIVX")
|
2203 |
|| c->codec_tag == AV_RL32("XVID")*/
|
2204 |
|| c->codec_id == CODEC_ID_MPEG2VIDEO |
2205 |
|| c->codec_id == CODEC_ID_H264 |
2206 |
) |
2207 |
return 1; |
2208 |
return 0; |
2209 |
} |
2210 |
|
2211 |
int av_find_stream_info(AVFormatContext *ic)
|
2212 |
{ |
2213 |
int i, count, ret, read_size, j;
|
2214 |
AVStream *st; |
2215 |
AVPacket pkt1, *pkt; |
2216 |
int64_t old_offset = avio_tell(ic->pb); |
2217 |
|
2218 |
for(i=0;i<ic->nb_streams;i++) { |
2219 |
AVCodec *codec; |
2220 |
st = ic->streams[i]; |
2221 |
if (st->codec->codec_id == CODEC_ID_AAC) {
|
2222 |
st->codec->sample_rate = 0;
|
2223 |
st->codec->frame_size = 0;
|
2224 |
st->codec->channels = 0;
|
2225 |
} |
2226 |
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
|
2227 |
st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
2228 |
/* if(!st->time_base.num)
|
2229 |
st->time_base= */
|
2230 |
if(!st->codec->time_base.num)
|
2231 |
st->codec->time_base= st->time_base; |
2232 |
} |
2233 |
//only for the split stuff
|
2234 |
if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
|
2235 |
st->parser = av_parser_init(st->codec->codec_id); |
2236 |
if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
|
2237 |
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
2238 |
} |
2239 |
} |
2240 |
assert(!st->codec->codec); |
2241 |
codec = avcodec_find_decoder(st->codec->codec_id); |
2242 |
|
2243 |
/* Force decoding of at least one frame of codec data
|
2244 |
* this makes sure the codec initializes the channel configuration
|
2245 |
* and does not trust the values from the container.
|
2246 |
*/
|
2247 |
if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF)
|
2248 |
st->codec->channels = 0;
|
2249 |
|
2250 |
/* Ensure that subtitle_header is properly set. */
|
2251 |
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
|
2252 |
&& codec && !st->codec->codec) |
2253 |
avcodec_open(st->codec, codec); |
2254 |
|
2255 |
//try to just open decoders, in case this is enough to get parameters
|
2256 |
if(!has_codec_parameters(st->codec)){
|
2257 |
if (codec && !st->codec->codec)
|
2258 |
avcodec_open(st->codec, codec); |
2259 |
} |
2260 |
} |
2261 |
|
2262 |
for (i=0; i<ic->nb_streams; i++) { |
2263 |
ic->streams[i]->info->last_dts = AV_NOPTS_VALUE; |
2264 |
} |
2265 |
|
2266 |
count = 0;
|
2267 |
read_size = 0;
|
2268 |
for(;;) {
|
2269 |
if(url_interrupt_cb()){
|
2270 |
ret= AVERROR_EXIT; |
2271 |
av_log(ic, AV_LOG_DEBUG, "interrupted\n");
|
2272 |
break;
|
2273 |
} |
2274 |
|
2275 |
/* check if one codec still needs to be handled */
|
2276 |
for(i=0;i<ic->nb_streams;i++) { |
2277 |
st = ic->streams[i]; |
2278 |
if (!has_codec_parameters(st->codec))
|
2279 |
break;
|
2280 |
/* variable fps and no guess at the real fps */
|
2281 |
if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
|
2282 |
&& st->info->duration_count<20 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
|
2283 |
break;
|
2284 |
if(st->parser && st->parser->parser->split && !st->codec->extradata)
|
2285 |
break;
|
2286 |
if(st->first_dts == AV_NOPTS_VALUE)
|
2287 |
break;
|
2288 |
} |
2289 |
if (i == ic->nb_streams) {
|
2290 |
/* NOTE: if the format has no header, then we need to read
|
2291 |
some packets to get most of the streams, so we cannot
|
2292 |
stop here */
|
2293 |
if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
|
2294 |
/* if we found the info for all the codecs, we can stop */
|
2295 |
ret = count; |
2296 |
av_log(ic, AV_LOG_DEBUG, "All info found\n");
|
2297 |
break;
|
2298 |
} |
2299 |
} |
2300 |
/* we did not get all the codec info, but we read too much data */
|
2301 |
if (read_size >= ic->probesize) {
|
2302 |
ret = count; |
2303 |
av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
|
2304 |
break;
|
2305 |
} |
2306 |
|
2307 |
/* NOTE: a new stream can be added there if no header in file
|
2308 |
(AVFMTCTX_NOHEADER) */
|
2309 |
ret = av_read_frame_internal(ic, &pkt1); |
2310 |
if (ret < 0 && ret != AVERROR(EAGAIN)) { |
2311 |
/* EOF or error */
|
2312 |
ret = -1; /* we could not have all the codec parameters before EOF */ |
2313 |
for(i=0;i<ic->nb_streams;i++) { |
2314 |
st = ic->streams[i]; |
2315 |
if (!has_codec_parameters(st->codec)){
|
2316 |
char buf[256]; |
2317 |
avcodec_string(buf, sizeof(buf), st->codec, 0); |
2318 |
av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
|
2319 |
} else {
|
2320 |
ret = 0;
|
2321 |
} |
2322 |
} |
2323 |
break;
|
2324 |
} |
2325 |
|
2326 |
if (ret == AVERROR(EAGAIN))
|
2327 |
continue;
|
2328 |
|
2329 |
pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end); |
2330 |
if ((ret = av_dup_packet(pkt)) < 0) |
2331 |
goto find_stream_info_err;
|
2332 |
|
2333 |
read_size += pkt->size; |
2334 |
|
2335 |
st = ic->streams[pkt->stream_index]; |
2336 |
if (st->codec_info_nb_frames>1) { |
2337 |
if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) { |
2338 |
av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
|
2339 |
break;
|
2340 |
} |
2341 |
st->info->codec_info_duration += pkt->duration; |
2342 |
} |
2343 |
{ |
2344 |
int64_t last = st->info->last_dts; |
2345 |
int64_t duration= pkt->dts - last; |
2346 |
|
2347 |
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){ |
2348 |
double dur= duration * av_q2d(st->time_base);
|
2349 |
|
2350 |
// if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
|
2351 |
// av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
|
2352 |
if (st->info->duration_count < 2) |
2353 |
memset(st->info->duration_error, 0, sizeof(st->info->duration_error)); |
2354 |
for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) { |
2355 |
int framerate= get_std_framerate(i);
|
2356 |
int ticks= lrintf(dur*framerate/(1001*12)); |
2357 |
double error= dur - ticks*1001*12/(double)framerate; |
2358 |
st->info->duration_error[i] += error*error; |
2359 |
} |
2360 |
st->info->duration_count++; |
2361 |
// ignore the first 4 values, they might have some random jitter
|
2362 |
if (st->info->duration_count > 3) |
2363 |
st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration); |
2364 |
} |
2365 |
if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1) |
2366 |
st->info->last_dts = pkt->dts; |
2367 |
} |
2368 |
if(st->parser && st->parser->parser->split && !st->codec->extradata){
|
2369 |
int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
|
2370 |
if(i){
|
2371 |
st->codec->extradata_size= i; |
2372 |
st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
2373 |
memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size); |
2374 |
memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
2375 |
} |
2376 |
} |
2377 |
|
2378 |
/* if still no information, we try to open the codec and to
|
2379 |
decompress the frame. We try to avoid that in most cases as
|
2380 |
it takes longer and uses more memory. For MPEG-4, we need to
|
2381 |
decompress for QuickTime. */
|
2382 |
if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st))
|
2383 |
try_decode_frame(st, pkt); |
2384 |
|
2385 |
st->codec_info_nb_frames++; |
2386 |
count++; |
2387 |
} |
2388 |
|
2389 |
// close codecs which were opened in try_decode_frame()
|
2390 |
for(i=0;i<ic->nb_streams;i++) { |
2391 |
st = ic->streams[i]; |
2392 |
if(st->codec->codec)
|
2393 |
avcodec_close(st->codec); |
2394 |
} |
2395 |
for(i=0;i<ic->nb_streams;i++) { |
2396 |
st = ic->streams[i]; |
2397 |
if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration) |
2398 |
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
2399 |
(st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
|
2400 |
st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
|
2401 |
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
2402 |
if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
|
2403 |
st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); |
2404 |
|
2405 |
// the check for tb_unreliable() is not completely correct, since this is not about handling
|
2406 |
// a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
|
2407 |
// ipmovie.c produces.
|
2408 |
if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num) |
2409 |
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX); |
2410 |
if (st->info->duration_count && !st->r_frame_rate.num
|
2411 |
&& tb_unreliable(st->codec) /*&&
|
2412 |
//FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
|
2413 |
st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
|
2414 |
int num = 0; |
2415 |
double best_error= 2*av_q2d(st->time_base); |
2416 |
best_error = best_error*best_error*st->info->duration_count*1000*12*30; |
2417 |
|
2418 |
for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) { |
2419 |
double error = st->info->duration_error[j] * get_std_framerate(j);
|
2420 |
// if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
|
2421 |
// av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
|
2422 |
if(error < best_error){
|
2423 |
best_error= error; |
2424 |
num = get_std_framerate(j); |
2425 |
} |
2426 |
} |
2427 |
// do not increase frame rate by more than 1 % in order to match a standard rate.
|
2428 |
if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate))) |
2429 |
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); |
2430 |
} |
2431 |
|
2432 |
if (!st->r_frame_rate.num){
|
2433 |
if( st->codec->time_base.den * (int64_t)st->time_base.num
|
2434 |
<= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){ |
2435 |
st->r_frame_rate.num = st->codec->time_base.den; |
2436 |
st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame; |
2437 |
}else{
|
2438 |
st->r_frame_rate.num = st->time_base.den; |
2439 |
st->r_frame_rate.den = st->time_base.num; |
2440 |
} |
2441 |
} |
2442 |
}else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
2443 |
if(!st->codec->bits_per_coded_sample)
|
2444 |
st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id); |
2445 |
} |
2446 |
} |
2447 |
|
2448 |
av_estimate_timings(ic, old_offset); |
2449 |
|
2450 |
compute_chapters_end(ic); |
2451 |
|
2452 |
#if 0
|
2453 |
/* correct DTS for B-frame streams with no timestamps */
|
2454 |
for(i=0;i<ic->nb_streams;i++) {
|
2455 |
st = ic->streams[i];
|
2456 |
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
2457 |
if(b-frames){
|
2458 |
ppktl = &ic->packet_buffer;
|
2459 |
while(ppkt1){
|
2460 |
if(ppkt1->stream_index != i)
|
2461 |
continue;
|
2462 |
if(ppkt1->pkt->dts < 0)
|
2463 |
break;
|
2464 |
if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
|
2465 |
break;
|
2466 |
ppkt1->pkt->dts -= delta;
|
2467 |
ppkt1= ppkt1->next;
|
2468 |
}
|
2469 |
if(ppkt1)
|
2470 |
continue;
|
2471 |
st->cur_dts -= delta;
|
2472 |
}
|
2473 |
}
|
2474 |
}
|
2475 |
#endif
|
2476 |
|
2477 |
find_stream_info_err:
|
2478 |
for (i=0; i < ic->nb_streams; i++) |
2479 |
av_freep(&ic->streams[i]->info); |
2480 |
return ret;
|
2481 |
} |
2482 |
|
2483 |
static AVProgram *find_program_from_stream(AVFormatContext *ic, int s) |
2484 |
{ |
2485 |
int i, j;
|
2486 |
|
2487 |
for (i = 0; i < ic->nb_programs; i++) |
2488 |
for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++) |
2489 |
if (ic->programs[i]->stream_index[j] == s)
|
2490 |
return ic->programs[i];
|
2491 |
return NULL; |
2492 |
} |
2493 |
|
2494 |
int av_find_best_stream(AVFormatContext *ic,
|
2495 |
enum AVMediaType type,
|
2496 |
int wanted_stream_nb,
|
2497 |
int related_stream,
|
2498 |
AVCodec **decoder_ret, |
2499 |
int flags)
|
2500 |
{ |
2501 |
int i, nb_streams = ic->nb_streams, stream_number = 0; |
2502 |
int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1; |
2503 |
unsigned *program = NULL; |
2504 |
AVCodec *decoder = NULL, *best_decoder = NULL; |
2505 |
|
2506 |
if (related_stream >= 0 && wanted_stream_nb < 0) { |
2507 |
AVProgram *p = find_program_from_stream(ic, related_stream); |
2508 |
if (p) {
|
2509 |
program = p->stream_index; |
2510 |
nb_streams = p->nb_stream_indexes; |
2511 |
} |
2512 |
} |
2513 |
for (i = 0; i < nb_streams; i++) { |
2514 |
AVStream *st = ic->streams[program ? program[i] : i]; |
2515 |
AVCodecContext *avctx = st->codec; |
2516 |
if (avctx->codec_type != type)
|
2517 |
continue;
|
2518 |
if (wanted_stream_nb >= 0 && stream_number++ != wanted_stream_nb) |
2519 |
continue;
|
2520 |
if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
|
2521 |
continue;
|
2522 |
if (decoder_ret) {
|
2523 |
decoder = avcodec_find_decoder(ic->streams[i]->codec->codec_id); |
2524 |
if (!decoder) {
|
2525 |
if (ret < 0) |
2526 |
ret = AVERROR_DECODER_NOT_FOUND; |
2527 |
continue;
|
2528 |
} |
2529 |
} |
2530 |
if (best_count >= st->codec_info_nb_frames)
|
2531 |
continue;
|
2532 |
best_count = st->codec_info_nb_frames; |
2533 |
ret = program ? program[i] : i; |
2534 |
best_decoder = decoder; |
2535 |
if (program && i == nb_streams - 1 && ret < 0) { |
2536 |
program = NULL;
|
2537 |
nb_streams = ic->nb_streams; |
2538 |
i = 0; /* no related stream found, try again with everything */ |
2539 |
} |
2540 |
} |
2541 |
if (decoder_ret)
|
2542 |
*decoder_ret = best_decoder; |
2543 |
return ret;
|
2544 |
} |
2545 |
|
2546 |
/*******************************************************/
|
2547 |
|
2548 |
int av_read_play(AVFormatContext *s)
|
2549 |
{ |
2550 |
if (s->iformat->read_play)
|
2551 |
return s->iformat->read_play(s);
|
2552 |
if (s->pb)
|
2553 |
return av_url_read_fpause(s->pb, 0); |
2554 |
return AVERROR(ENOSYS);
|
2555 |
} |
2556 |
|
2557 |
int av_read_pause(AVFormatContext *s)
|
2558 |
{ |
2559 |
if (s->iformat->read_pause)
|
2560 |
return s->iformat->read_pause(s);
|
2561 |
if (s->pb)
|
2562 |
return av_url_read_fpause(s->pb, 1); |
2563 |
return AVERROR(ENOSYS);
|
2564 |
} |
2565 |
|
2566 |
void av_close_input_stream(AVFormatContext *s)
|
2567 |
{ |
2568 |
flush_packet_queue(s); |
2569 |
if (s->iformat->read_close)
|
2570 |
s->iformat->read_close(s); |
2571 |
avformat_free_context(s); |
2572 |
} |
2573 |
|
2574 |
void avformat_free_context(AVFormatContext *s)
|
2575 |
{ |
2576 |
int i;
|
2577 |
AVStream *st; |
2578 |
|
2579 |
for(i=0;i<s->nb_streams;i++) { |
2580 |
/* free all data in a stream component */
|
2581 |
st = s->streams[i]; |
2582 |
if (st->parser) {
|
2583 |
av_parser_close(st->parser); |
2584 |
av_free_packet(&st->cur_pkt); |
2585 |
} |
2586 |
av_metadata_free(&st->metadata); |
2587 |
av_free(st->index_entries); |
2588 |
av_free(st->codec->extradata); |
2589 |
av_free(st->codec->subtitle_header); |
2590 |
av_free(st->codec); |
2591 |
#if FF_API_OLD_METADATA
|
2592 |
av_free(st->filename); |
2593 |
#endif
|
2594 |
av_free(st->priv_data); |
2595 |
av_free(st->info); |
2596 |
av_free(st); |
2597 |
} |
2598 |
for(i=s->nb_programs-1; i>=0; i--) { |
2599 |
#if FF_API_OLD_METADATA
|
2600 |
av_freep(&s->programs[i]->provider_name); |
2601 |
av_freep(&s->programs[i]->name); |
2602 |
#endif
|
2603 |
av_metadata_free(&s->programs[i]->metadata); |
2604 |
av_freep(&s->programs[i]->stream_index); |
2605 |
av_freep(&s->programs[i]); |
2606 |
} |
2607 |
av_freep(&s->programs); |
2608 |
av_freep(&s->priv_data); |
2609 |
while(s->nb_chapters--) {
|
2610 |
#if FF_API_OLD_METADATA
|
2611 |
av_free(s->chapters[s->nb_chapters]->title); |
2612 |
#endif
|
2613 |
av_metadata_free(&s->chapters[s->nb_chapters]->metadata); |
2614 |
av_free(s->chapters[s->nb_chapters]); |
2615 |
} |
2616 |
av_freep(&s->chapters); |
2617 |
av_metadata_free(&s->metadata); |
2618 |
av_freep(&s->key); |
2619 |
av_free(s); |
2620 |
} |
2621 |
|
2622 |
void av_close_input_file(AVFormatContext *s)
|
2623 |
{ |
2624 |
AVIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
|
2625 |
av_close_input_stream(s); |
2626 |
if (pb)
|
2627 |
avio_close(pb); |
2628 |
} |
2629 |
|
2630 |
AVStream *av_new_stream(AVFormatContext *s, int id)
|
2631 |
{ |
2632 |
AVStream *st; |
2633 |
int i;
|
2634 |
|
2635 |
#if FF_API_MAX_STREAMS
|
2636 |
if (s->nb_streams >= MAX_STREAMS){
|
2637 |
av_log(s, AV_LOG_ERROR, "Too many streams\n");
|
2638 |
return NULL; |
2639 |
} |
2640 |
#else
|
2641 |
AVStream **streams; |
2642 |
|
2643 |
if (s->nb_streams >= INT_MAX/sizeof(*streams)) |
2644 |
return NULL; |
2645 |
streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams)); |
2646 |
if (!streams)
|
2647 |
return NULL; |
2648 |
s->streams = streams; |
2649 |
#endif
|
2650 |
|
2651 |
st = av_mallocz(sizeof(AVStream));
|
2652 |
if (!st)
|
2653 |
return NULL; |
2654 |
if (!(st->info = av_mallocz(sizeof(*st->info)))) { |
2655 |
av_free(st); |
2656 |
return NULL; |
2657 |
} |
2658 |
|
2659 |
st->codec= avcodec_alloc_context(); |
2660 |
if (s->iformat) {
|
2661 |
/* no default bitrate if decoding */
|
2662 |
st->codec->bit_rate = 0;
|
2663 |
} |
2664 |
st->index = s->nb_streams; |
2665 |
st->id = id; |
2666 |
st->start_time = AV_NOPTS_VALUE; |
2667 |
st->duration = AV_NOPTS_VALUE; |
2668 |
/* we set the current DTS to 0 so that formats without any timestamps
|
2669 |
but durations get some timestamps, formats with some unknown
|
2670 |
timestamps have their first few packets buffered and the
|
2671 |
timestamps corrected before they are returned to the user */
|
2672 |
st->cur_dts = 0;
|
2673 |
st->first_dts = AV_NOPTS_VALUE; |
2674 |
st->probe_packets = MAX_PROBE_PACKETS; |
2675 |
|
2676 |
/* default pts setting is MPEG-like */
|
2677 |
av_set_pts_info(st, 33, 1, 90000); |
2678 |
st->last_IP_pts = AV_NOPTS_VALUE; |
2679 |
for(i=0; i<MAX_REORDER_DELAY+1; i++) |
2680 |
st->pts_buffer[i]= AV_NOPTS_VALUE; |
2681 |
st->reference_dts = AV_NOPTS_VALUE; |
2682 |
|
2683 |
st->sample_aspect_ratio = (AVRational){0,1}; |
2684 |
|
2685 |
s->streams[s->nb_streams++] = st; |
2686 |
return st;
|
2687 |
} |
2688 |
|
2689 |
AVProgram *av_new_program(AVFormatContext *ac, int id)
|
2690 |
{ |
2691 |
AVProgram *program=NULL;
|
2692 |
int i;
|
2693 |
|
2694 |
#ifdef DEBUG_SI
|
2695 |
av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
|
2696 |
#endif
|
2697 |
|
2698 |
for(i=0; i<ac->nb_programs; i++) |
2699 |
if(ac->programs[i]->id == id)
|
2700 |
program = ac->programs[i]; |
2701 |
|
2702 |
if(!program){
|
2703 |
program = av_mallocz(sizeof(AVProgram));
|
2704 |
if (!program)
|
2705 |
return NULL; |
2706 |
dynarray_add(&ac->programs, &ac->nb_programs, program); |
2707 |
program->discard = AVDISCARD_NONE; |
2708 |
} |
2709 |
program->id = id; |
2710 |
|
2711 |
return program;
|
2712 |
} |
2713 |
|
2714 |
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title) |
2715 |
{ |
2716 |
AVChapter *chapter = NULL;
|
2717 |
int i;
|
2718 |
|
2719 |
for(i=0; i<s->nb_chapters; i++) |
2720 |
if(s->chapters[i]->id == id)
|
2721 |
chapter = s->chapters[i]; |
2722 |
|
2723 |
if(!chapter){
|
2724 |
chapter= av_mallocz(sizeof(AVChapter));
|
2725 |
if(!chapter)
|
2726 |
return NULL; |
2727 |
dynarray_add(&s->chapters, &s->nb_chapters, chapter); |
2728 |
} |
2729 |
#if FF_API_OLD_METADATA
|
2730 |
av_free(chapter->title); |
2731 |
#endif
|
2732 |
av_metadata_set2(&chapter->metadata, "title", title, 0); |
2733 |
chapter->id = id; |
2734 |
chapter->time_base= time_base; |
2735 |
chapter->start = start; |
2736 |
chapter->end = end; |
2737 |
|
2738 |
return chapter;
|
2739 |
} |
2740 |
|
2741 |
/************************************************************/
|
2742 |
/* output media file */
|
2743 |
|
2744 |
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
|
2745 |
{ |
2746 |
int ret;
|
2747 |
|
2748 |
if (s->oformat->priv_data_size > 0) { |
2749 |
s->priv_data = av_mallocz(s->oformat->priv_data_size); |
2750 |
if (!s->priv_data)
|
2751 |
return AVERROR(ENOMEM);
|
2752 |
if (s->oformat->priv_class) {
|
2753 |
*(const AVClass**)s->priv_data= s->oformat->priv_class;
|
2754 |
av_opt_set_defaults(s->priv_data); |
2755 |
} |
2756 |
} else
|
2757 |
s->priv_data = NULL;
|
2758 |
|
2759 |
if (s->oformat->set_parameters) {
|
2760 |
ret = s->oformat->set_parameters(s, ap); |
2761 |
if (ret < 0) |
2762 |
return ret;
|
2763 |
} |
2764 |
return 0; |
2765 |
} |
2766 |
|
2767 |
static int validate_codec_tag(AVFormatContext *s, AVStream *st) |
2768 |
{ |
2769 |
const AVCodecTag *avctag;
|
2770 |
int n;
|
2771 |
enum CodecID id = CODEC_ID_NONE;
|
2772 |
unsigned int tag = 0; |
2773 |
|
2774 |
/**
|
2775 |
* Check that tag + id is in the table
|
2776 |
* If neither is in the table -> OK
|
2777 |
* If tag is in the table with another id -> FAIL
|
2778 |
* If id is in the table with another tag -> FAIL unless strict < normal
|
2779 |
*/
|
2780 |
for (n = 0; s->oformat->codec_tag[n]; n++) { |
2781 |
avctag = s->oformat->codec_tag[n]; |
2782 |
while (avctag->id != CODEC_ID_NONE) {
|
2783 |
if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
|
2784 |
id = avctag->id; |
2785 |
if (id == st->codec->codec_id)
|
2786 |
return 1; |
2787 |
} |
2788 |
if (avctag->id == st->codec->codec_id)
|
2789 |
tag = avctag->tag; |
2790 |
avctag++; |
2791 |
} |
2792 |
} |
2793 |
if (id != CODEC_ID_NONE)
|
2794 |
return 0; |
2795 |
if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
|
2796 |
return 0; |
2797 |
return 1; |
2798 |
} |
2799 |
|
2800 |
int av_write_header(AVFormatContext *s)
|
2801 |
{ |
2802 |
int ret, i;
|
2803 |
AVStream *st; |
2804 |
|
2805 |
// some sanity checks
|
2806 |
if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) { |
2807 |
av_log(s, AV_LOG_ERROR, "no streams\n");
|
2808 |
return AVERROR(EINVAL);
|
2809 |
} |
2810 |
|
2811 |
for(i=0;i<s->nb_streams;i++) { |
2812 |
st = s->streams[i]; |
2813 |
|
2814 |
switch (st->codec->codec_type) {
|
2815 |
case AVMEDIA_TYPE_AUDIO:
|
2816 |
if(st->codec->sample_rate<=0){ |
2817 |
av_log(s, AV_LOG_ERROR, "sample rate not set\n");
|
2818 |
return AVERROR(EINVAL);
|
2819 |
} |
2820 |
if(!st->codec->block_align)
|
2821 |
st->codec->block_align = st->codec->channels * |
2822 |
av_get_bits_per_sample(st->codec->codec_id) >> 3;
|
2823 |
break;
|
2824 |
case AVMEDIA_TYPE_VIDEO:
|
2825 |
if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too? |
2826 |
av_log(s, AV_LOG_ERROR, "time base not set\n");
|
2827 |
return AVERROR(EINVAL);
|
2828 |
} |
2829 |
if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){ |
2830 |
av_log(s, AV_LOG_ERROR, "dimensions not set\n");
|
2831 |
return AVERROR(EINVAL);
|
2832 |
} |
2833 |
if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
|
2834 |
av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
|
2835 |
return AVERROR(EINVAL);
|
2836 |
} |
2837 |
break;
|
2838 |
} |
2839 |
|
2840 |
if(s->oformat->codec_tag){
|
2841 |
if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){ |
2842 |
//the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
|
2843 |
st->codec->codec_tag= 0;
|
2844 |
} |
2845 |
if(st->codec->codec_tag){
|
2846 |
if (!validate_codec_tag(s, st)) {
|
2847 |
char tagbuf[32]; |
2848 |
av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
|
2849 |
av_log(s, AV_LOG_ERROR, |
2850 |
"Tag %s/0x%08x incompatible with output codec id '%d'\n",
|
2851 |
tagbuf, st->codec->codec_tag, st->codec->codec_id); |
2852 |
return AVERROR_INVALIDDATA;
|
2853 |
} |
2854 |
}else
|
2855 |
st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id); |
2856 |
} |
2857 |
|
2858 |
if(s->oformat->flags & AVFMT_GLOBALHEADER &&
|
2859 |
!(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER)) |
2860 |
av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
|
2861 |
} |
2862 |
|
2863 |
if (!s->priv_data && s->oformat->priv_data_size > 0) { |
2864 |
s->priv_data = av_mallocz(s->oformat->priv_data_size); |
2865 |
if (!s->priv_data)
|
2866 |
return AVERROR(ENOMEM);
|
2867 |
} |
2868 |
|
2869 |
#if FF_API_OLD_METADATA
|
2870 |
ff_metadata_mux_compat(s); |
2871 |
#endif
|
2872 |
|
2873 |
/* set muxer identification string */
|
2874 |
if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) { |
2875 |
av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0); |
2876 |
} |
2877 |
|
2878 |
if(s->oformat->write_header){
|
2879 |
ret = s->oformat->write_header(s); |
2880 |
if (ret < 0) |
2881 |
return ret;
|
2882 |
} |
2883 |
|
2884 |
/* init PTS generation */
|
2885 |
for(i=0;i<s->nb_streams;i++) { |
2886 |
int64_t den = AV_NOPTS_VALUE; |
2887 |
st = s->streams[i]; |
2888 |
|
2889 |
switch (st->codec->codec_type) {
|
2890 |
case AVMEDIA_TYPE_AUDIO:
|
2891 |
den = (int64_t)st->time_base.num * st->codec->sample_rate; |
2892 |
break;
|
2893 |
case AVMEDIA_TYPE_VIDEO:
|
2894 |
den = (int64_t)st->time_base.num * st->codec->time_base.den; |
2895 |
break;
|
2896 |
default:
|
2897 |
break;
|
2898 |
} |
2899 |
if (den != AV_NOPTS_VALUE) {
|
2900 |
if (den <= 0) |
2901 |
return AVERROR_INVALIDDATA;
|
2902 |
av_frac_init(&st->pts, 0, 0, den); |
2903 |
} |
2904 |
} |
2905 |
return 0; |
2906 |
} |
2907 |
|
2908 |
//FIXME merge with compute_pkt_fields
|
2909 |
static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){ |
2910 |
int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
|
2911 |
int num, den, frame_size, i;
|
2912 |
|
2913 |
// av_log(s, AV_LOG_DEBUG, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
|
2914 |
|
2915 |
/* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
|
2916 |
return -1;*/
|
2917 |
|
2918 |
/* duration field */
|
2919 |
if (pkt->duration == 0) { |
2920 |
compute_frame_duration(&num, &den, st, NULL, pkt);
|
2921 |
if (den && num) {
|
2922 |
pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
|
2923 |
} |
2924 |
} |
2925 |
|
2926 |
if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0) |
2927 |
pkt->pts= pkt->dts; |
2928 |
|
2929 |
//XXX/FIXME this is a temporary hack until all encoders output pts
|
2930 |
if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){ |
2931 |
pkt->dts= |
2932 |
// pkt->pts= st->cur_dts;
|
2933 |
pkt->pts= st->pts.val; |
2934 |
} |
2935 |
|
2936 |
//calculate dts from pts
|
2937 |
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
|
2938 |
st->pts_buffer[0]= pkt->pts;
|
2939 |
for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++) |
2940 |
st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
|
2941 |
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
2942 |
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
|
2943 |
|
2944 |
pkt->dts= st->pts_buffer[0];
|
2945 |
} |
2946 |
|
2947 |
if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
|
2948 |
av_log(s, AV_LOG_ERROR, |
2949 |
"Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n", |
2950 |
st->index, st->cur_dts, pkt->dts); |
2951 |
return -1; |
2952 |
} |
2953 |
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
|
2954 |
av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
|
2955 |
return -1; |
2956 |
} |
2957 |
|
2958 |
// av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
|
2959 |
st->cur_dts= pkt->dts; |
2960 |
st->pts.val= pkt->dts; |
2961 |
|
2962 |
/* update pts */
|
2963 |
switch (st->codec->codec_type) {
|
2964 |
case AVMEDIA_TYPE_AUDIO:
|
2965 |
frame_size = get_audio_frame_size(st->codec, pkt->size); |
2966 |
|
2967 |
/* HACK/FIXME, we skip the initial 0 size packets as they are most
|
2968 |
likely equal to the encoder delay, but it would be better if we
|
2969 |
had the real timestamps from the encoder */
|
2970 |
if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) { |
2971 |
av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); |
2972 |
} |
2973 |
break;
|
2974 |
case AVMEDIA_TYPE_VIDEO:
|
2975 |
av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num); |
2976 |
break;
|
2977 |
default:
|
2978 |
break;
|
2979 |
} |
2980 |
return 0; |
2981 |
} |
2982 |
|
2983 |
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
|
2984 |
{ |
2985 |
int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
|
2986 |
|
2987 |
if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
2988 |
return ret;
|
2989 |
|
2990 |
ret= s->oformat->write_packet(s, pkt); |
2991 |
return ret;
|
2992 |
} |
2993 |
|
2994 |
void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
|
2995 |
int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
|
2996 |
{ |
2997 |
AVPacketList **next_point, *this_pktl; |
2998 |
|
2999 |
this_pktl = av_mallocz(sizeof(AVPacketList));
|
3000 |
this_pktl->pkt= *pkt; |
3001 |
pkt->destruct= NULL; // do not free original but only the copy |
3002 |
av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
|
3003 |
|
3004 |
if(s->streams[pkt->stream_index]->last_in_packet_buffer){
|
3005 |
next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next); |
3006 |
}else
|
3007 |
next_point = &s->packet_buffer; |
3008 |
|
3009 |
if(*next_point){
|
3010 |
if(compare(s, &s->packet_buffer_end->pkt, pkt)){
|
3011 |
while(!compare(s, &(*next_point)->pkt, pkt)){
|
3012 |
next_point= &(*next_point)->next; |
3013 |
} |
3014 |
goto next_non_null;
|
3015 |
}else{
|
3016 |
next_point = &(s->packet_buffer_end->next); |
3017 |
} |
3018 |
} |
3019 |
assert(!*next_point); |
3020 |
|
3021 |
s->packet_buffer_end= this_pktl; |
3022 |
next_non_null:
|
3023 |
|
3024 |
this_pktl->next= *next_point; |
3025 |
|
3026 |
s->streams[pkt->stream_index]->last_in_packet_buffer= |
3027 |
*next_point= this_pktl; |
3028 |
} |
3029 |
|
3030 |
static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt) |
3031 |
{ |
3032 |
AVStream *st = s->streams[ pkt ->stream_index]; |
3033 |
AVStream *st2= s->streams[ next->stream_index]; |
3034 |
int64_t a= st2->time_base.num * (int64_t)st ->time_base.den; |
3035 |
int64_t b= st ->time_base.num * (int64_t)st2->time_base.den; |
3036 |
return av_rescale_rnd(pkt->dts, b, a, AV_ROUND_DOWN) < next->dts;
|
3037 |
} |
3038 |
|
3039 |
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){ |
3040 |
AVPacketList *pktl; |
3041 |
int stream_count=0; |
3042 |
int i;
|
3043 |
|
3044 |
if(pkt){
|
3045 |
ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts); |
3046 |
} |
3047 |
|
3048 |
for(i=0; i < s->nb_streams; i++) |
3049 |
stream_count+= !!s->streams[i]->last_in_packet_buffer; |
3050 |
|
3051 |
if(stream_count && (s->nb_streams == stream_count || flush)){
|
3052 |
pktl= s->packet_buffer; |
3053 |
*out= pktl->pkt; |
3054 |
|
3055 |
s->packet_buffer= pktl->next; |
3056 |
if(!s->packet_buffer)
|
3057 |
s->packet_buffer_end= NULL;
|
3058 |
|
3059 |
if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
|
3060 |
s->streams[out->stream_index]->last_in_packet_buffer= NULL;
|
3061 |
av_freep(&pktl); |
3062 |
return 1; |
3063 |
}else{
|
3064 |
av_init_packet(out); |
3065 |
return 0; |
3066 |
} |
3067 |
} |
3068 |
|
3069 |
/**
|
3070 |
* Interleave an AVPacket correctly so it can be muxed.
|
3071 |
* @param out the interleaved packet will be output here
|
3072 |
* @param in the input packet
|
3073 |
* @param flush 1 if no further packets are available as input and all
|
3074 |
* remaining packets should be output
|
3075 |
* @return 1 if a packet was output, 0 if no packet could be output,
|
3076 |
* < 0 if an error occurred
|
3077 |
*/
|
3078 |
static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){ |
3079 |
if(s->oformat->interleave_packet)
|
3080 |
return s->oformat->interleave_packet(s, out, in, flush);
|
3081 |
else
|
3082 |
return av_interleave_packet_per_dts(s, out, in, flush);
|
3083 |
} |
3084 |
|
3085 |
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
|
3086 |
AVStream *st= s->streams[ pkt->stream_index]; |
3087 |
|
3088 |
//FIXME/XXX/HACK drop zero sized packets
|
3089 |
if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0) |
3090 |
return 0; |
3091 |
|
3092 |
//av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
|
3093 |
if(compute_pkt_fields2(s, st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
3094 |
return -1; |
3095 |
|
3096 |
if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
3097 |
return -1; |
3098 |
|
3099 |
for(;;){
|
3100 |
AVPacket opkt; |
3101 |
int ret= av_interleave_packet(s, &opkt, pkt, 0); |
3102 |
if(ret<=0) //FIXME cleanup needed for ret<0 ? |
3103 |
return ret;
|
3104 |
|
3105 |
ret= s->oformat->write_packet(s, &opkt); |
3106 |
|
3107 |
av_free_packet(&opkt); |
3108 |
pkt= NULL;
|
3109 |
|
3110 |
if(ret<0) |
3111 |
return ret;
|
3112 |
} |
3113 |
} |
3114 |
|
3115 |
int av_write_trailer(AVFormatContext *s)
|
3116 |
{ |
3117 |
int ret, i;
|
3118 |
|
3119 |
for(;;){
|
3120 |
AVPacket pkt; |
3121 |
ret= av_interleave_packet(s, &pkt, NULL, 1); |
3122 |
if(ret<0) //FIXME cleanup needed for ret<0 ? |
3123 |
goto fail;
|
3124 |
if(!ret)
|
3125 |
break;
|
3126 |
|
3127 |
ret= s->oformat->write_packet(s, &pkt); |
3128 |
|
3129 |
av_free_packet(&pkt); |
3130 |
|
3131 |
if(ret<0) |
3132 |
goto fail;
|
3133 |
} |
3134 |
|
3135 |
if(s->oformat->write_trailer)
|
3136 |
ret = s->oformat->write_trailer(s); |
3137 |
fail:
|
3138 |
for(i=0;i<s->nb_streams;i++) { |
3139 |
av_freep(&s->streams[i]->priv_data); |
3140 |
av_freep(&s->streams[i]->index_entries); |
3141 |
} |
3142 |
av_freep(&s->priv_data); |
3143 |
return ret;
|
3144 |
} |
3145 |
|
3146 |
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx) |
3147 |
{ |
3148 |
int i, j;
|
3149 |
AVProgram *program=NULL;
|
3150 |
void *tmp;
|
3151 |
|
3152 |
if (idx >= ac->nb_streams) {
|
3153 |
av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
|
3154 |
return;
|
3155 |
} |
3156 |
|
3157 |
for(i=0; i<ac->nb_programs; i++){ |
3158 |
if(ac->programs[i]->id != progid)
|
3159 |
continue;
|
3160 |
program = ac->programs[i]; |
3161 |
for(j=0; j<program->nb_stream_indexes; j++) |
3162 |
if(program->stream_index[j] == idx)
|
3163 |
return;
|
3164 |
|
3165 |
tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1)); |
3166 |
if(!tmp)
|
3167 |
return;
|
3168 |
program->stream_index = tmp; |
3169 |
program->stream_index[program->nb_stream_indexes++] = idx; |
3170 |
return;
|
3171 |
} |
3172 |
} |
3173 |
|
3174 |
static void print_fps(double d, const char *postfix){ |
3175 |
uint64_t v= lrintf(d*100);
|
3176 |
if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix); |
3177 |
else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix); |
3178 |
else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix); |
3179 |
} |
3180 |
|
3181 |
static void dump_metadata(void *ctx, AVMetadata *m, const char *indent) |
3182 |
{ |
3183 |
if(m && !(m->count == 1 && av_metadata_get(m, "language", NULL, 0))){ |
3184 |
AVMetadataTag *tag=NULL;
|
3185 |
|
3186 |
av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
|
3187 |
while((tag=av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) { |
3188 |
if(strcmp("language", tag->key)) |
3189 |
av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
|
3190 |
} |
3191 |
} |
3192 |
} |
3193 |
|
3194 |
/* "user interface" functions */
|
3195 |
static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output) |
3196 |
{ |
3197 |
char buf[256]; |
3198 |
int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
|
3199 |
AVStream *st = ic->streams[i]; |
3200 |
int g = av_gcd(st->time_base.num, st->time_base.den);
|
3201 |
AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0); |
3202 |
avcodec_string(buf, sizeof(buf), st->codec, is_output);
|
3203 |
av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i); |
3204 |
/* the pid is an important information, so we display it */
|
3205 |
/* XXX: add a generic system */
|
3206 |
if (flags & AVFMT_SHOW_IDS)
|
3207 |
av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id); |
3208 |
if (lang)
|
3209 |
av_log(NULL, AV_LOG_INFO, "(%s)", lang->value); |
3210 |
av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g); |
3211 |
av_log(NULL, AV_LOG_INFO, ": %s", buf); |
3212 |
if (st->sample_aspect_ratio.num && // default |
3213 |
av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) { |
3214 |
AVRational display_aspect_ratio; |
3215 |
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, |
3216 |
st->codec->width*st->sample_aspect_ratio.num, |
3217 |
st->codec->height*st->sample_aspect_ratio.den, |
3218 |
1024*1024); |
3219 |
av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d", |
3220 |
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
3221 |
display_aspect_ratio.num, display_aspect_ratio.den); |
3222 |
} |
3223 |
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
|
3224 |
if(st->avg_frame_rate.den && st->avg_frame_rate.num)
|
3225 |
print_fps(av_q2d(st->avg_frame_rate), "fps");
|
3226 |
if(st->r_frame_rate.den && st->r_frame_rate.num)
|
3227 |
print_fps(av_q2d(st->r_frame_rate), "tbr");
|
3228 |
if(st->time_base.den && st->time_base.num)
|
3229 |
print_fps(1/av_q2d(st->time_base), "tbn"); |
3230 |
if(st->codec->time_base.den && st->codec->time_base.num)
|
3231 |
print_fps(1/av_q2d(st->codec->time_base), "tbc"); |
3232 |
} |
3233 |
if (st->disposition & AV_DISPOSITION_DEFAULT)
|
3234 |
av_log(NULL, AV_LOG_INFO, " (default)"); |
3235 |
if (st->disposition & AV_DISPOSITION_DUB)
|
3236 |
av_log(NULL, AV_LOG_INFO, " (dub)"); |
3237 |
if (st->disposition & AV_DISPOSITION_ORIGINAL)
|
3238 |
av_log(NULL, AV_LOG_INFO, " (original)"); |
3239 |
if (st->disposition & AV_DISPOSITION_COMMENT)
|
3240 |
av_log(NULL, AV_LOG_INFO, " (comment)"); |
3241 |
if (st->disposition & AV_DISPOSITION_LYRICS)
|
3242 |
av_log(NULL, AV_LOG_INFO, " (lyrics)"); |
3243 |
if (st->disposition & AV_DISPOSITION_KARAOKE)
|
3244 |
av_log(NULL, AV_LOG_INFO, " (karaoke)"); |
3245 |
if (st->disposition & AV_DISPOSITION_FORCED)
|
3246 |
av_log(NULL, AV_LOG_INFO, " (forced)"); |
3247 |
if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
|
3248 |
av_log(NULL, AV_LOG_INFO, " (hearing impaired)"); |
3249 |
if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
|
3250 |
av_log(NULL, AV_LOG_INFO, " (visual impaired)"); |
3251 |
if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
|
3252 |
av_log(NULL, AV_LOG_INFO, " (clean effects)"); |
3253 |
av_log(NULL, AV_LOG_INFO, "\n"); |
3254 |
dump_metadata(NULL, st->metadata, " "); |
3255 |
} |
3256 |
|
3257 |
#if FF_API_DUMP_FORMAT
|
3258 |
void dump_format(AVFormatContext *ic,
|
3259 |
int index,
|
3260 |
const char *url, |
3261 |
int is_output)
|
3262 |
{ |
3263 |
av_dump_format(ic, index, url, is_output); |
3264 |
} |
3265 |
#endif
|
3266 |
|
3267 |
void av_dump_format(AVFormatContext *ic,
|
3268 |
int index,
|
3269 |
const char *url, |
3270 |
int is_output)
|
3271 |
{ |
3272 |
int i;
|
3273 |
uint8_t *printed = av_mallocz(ic->nb_streams); |
3274 |
if (ic->nb_streams && !printed)
|
3275 |
return;
|
3276 |
|
3277 |
av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n", |
3278 |
is_output ? "Output" : "Input", |
3279 |
index, |
3280 |
is_output ? ic->oformat->name : ic->iformat->name, |
3281 |
is_output ? "to" : "from", url); |
3282 |
dump_metadata(NULL, ic->metadata, " "); |
3283 |
if (!is_output) {
|
3284 |
av_log(NULL, AV_LOG_INFO, " Duration: "); |
3285 |
if (ic->duration != AV_NOPTS_VALUE) {
|
3286 |
int hours, mins, secs, us;
|
3287 |
secs = ic->duration / AV_TIME_BASE; |
3288 |
us = ic->duration % AV_TIME_BASE; |
3289 |
mins = secs / 60;
|
3290 |
secs %= 60;
|
3291 |
hours = mins / 60;
|
3292 |
mins %= 60;
|
3293 |
av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs, |
3294 |
(100 * us) / AV_TIME_BASE);
|
3295 |
} else {
|
3296 |
av_log(NULL, AV_LOG_INFO, "N/A"); |
3297 |
} |
3298 |
if (ic->start_time != AV_NOPTS_VALUE) {
|
3299 |
int secs, us;
|
3300 |
av_log(NULL, AV_LOG_INFO, ", start: "); |
3301 |
secs = ic->start_time / AV_TIME_BASE; |
3302 |
us = abs(ic->start_time % AV_TIME_BASE); |
3303 |
av_log(NULL, AV_LOG_INFO, "%d.%06d", |
3304 |
secs, (int)av_rescale(us, 1000000, AV_TIME_BASE)); |
3305 |
} |
3306 |
av_log(NULL, AV_LOG_INFO, ", bitrate: "); |
3307 |
if (ic->bit_rate) {
|
3308 |
av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000); |
3309 |
} else {
|
3310 |
av_log(NULL, AV_LOG_INFO, "N/A"); |
3311 |
} |
3312 |
av_log(NULL, AV_LOG_INFO, "\n"); |
3313 |
} |
3314 |
for (i = 0; i < ic->nb_chapters; i++) { |
3315 |
AVChapter *ch = ic->chapters[i]; |
3316 |
av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i); |
3317 |
av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base)); |
3318 |
av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base)); |
3319 |
|
3320 |
dump_metadata(NULL, ch->metadata, " "); |
3321 |
} |
3322 |
if(ic->nb_programs) {
|
3323 |
int j, k, total = 0; |
3324 |
for(j=0; j<ic->nb_programs; j++) { |
3325 |
AVMetadataTag *name = av_metadata_get(ic->programs[j]->metadata, |
3326 |
"name", NULL, 0); |
3327 |
av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id, |
3328 |
name ? name->value : "");
|
3329 |
dump_metadata(NULL, ic->programs[j]->metadata, " "); |
3330 |
for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) { |
3331 |
dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output); |
3332 |
printed[ic->programs[j]->stream_index[k]] = 1;
|
3333 |
} |
3334 |
total += ic->programs[j]->nb_stream_indexes; |
3335 |
} |
3336 |
if (total < ic->nb_streams)
|
3337 |
av_log(NULL, AV_LOG_INFO, " No Program\n"); |
3338 |
} |
3339 |
for(i=0;i<ic->nb_streams;i++) |
3340 |
if (!printed[i])
|
3341 |
dump_stream_format(ic, i, index, is_output); |
3342 |
|
3343 |
av_free(printed); |
3344 |
} |
3345 |
|
3346 |
#if FF_API_PARSE_FRAME_PARAM
|
3347 |
#include "libavutil/parseutils.h" |
3348 |
|
3349 |
int parse_image_size(int *width_ptr, int *height_ptr, const char *str) |
3350 |
{ |
3351 |
return av_parse_video_size(width_ptr, height_ptr, str);
|
3352 |
} |
3353 |
|
3354 |
int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg) |
3355 |
{ |
3356 |
AVRational frame_rate; |
3357 |
int ret = av_parse_video_rate(&frame_rate, arg);
|
3358 |
*frame_rate_num= frame_rate.num; |
3359 |
*frame_rate_den= frame_rate.den; |
3360 |
return ret;
|
3361 |
} |
3362 |
#endif
|
3363 |
|
3364 |
int64_t av_gettime(void)
|
3365 |
{ |
3366 |
struct timeval tv;
|
3367 |
gettimeofday(&tv,NULL);
|
3368 |
return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec; |
3369 |
} |
3370 |
|
3371 |
uint64_t ff_ntp_time(void)
|
3372 |
{ |
3373 |
return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US; |
3374 |
} |
3375 |
|
3376 |
#if FF_API_PARSE_DATE
|
3377 |
#include "libavutil/parseutils.h" |
3378 |
|
3379 |
int64_t parse_date(const char *timestr, int duration) |
3380 |
{ |
3381 |
int64_t timeval; |
3382 |
av_parse_time(&timeval, timestr, duration); |
3383 |
return timeval;
|
3384 |
} |
3385 |
#endif
|
3386 |
|
3387 |
#if FF_API_FIND_INFO_TAG
|
3388 |
#include "libavutil/parseutils.h" |
3389 |
|
3390 |
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info) |
3391 |
{ |
3392 |
return av_find_info_tag(arg, arg_size, tag1, info);
|
3393 |
} |
3394 |
#endif
|
3395 |
|
3396 |
int av_get_frame_filename(char *buf, int buf_size, |
3397 |
const char *path, int number) |
3398 |
{ |
3399 |
const char *p; |
3400 |
char *q, buf1[20], c; |
3401 |
int nd, len, percentd_found;
|
3402 |
|
3403 |
q = buf; |
3404 |
p = path; |
3405 |
percentd_found = 0;
|
3406 |
for(;;) {
|
3407 |
c = *p++; |
3408 |
if (c == '\0') |
3409 |
break;
|
3410 |
if (c == '%') { |
3411 |
do {
|
3412 |
nd = 0;
|
3413 |
while (isdigit(*p)) {
|
3414 |
nd = nd * 10 + *p++ - '0'; |
3415 |
} |
3416 |
c = *p++; |
3417 |
} while (isdigit(c));
|
3418 |
|
3419 |
switch(c) {
|
3420 |
case '%': |
3421 |
goto addchar;
|
3422 |
case 'd': |
3423 |
if (percentd_found)
|
3424 |
goto fail;
|
3425 |
percentd_found = 1;
|
3426 |
snprintf(buf1, sizeof(buf1), "%0*d", nd, number); |
3427 |
len = strlen(buf1); |
3428 |
if ((q - buf + len) > buf_size - 1) |
3429 |
goto fail;
|
3430 |
memcpy(q, buf1, len); |
3431 |
q += len; |
3432 |
break;
|
3433 |
default:
|
3434 |
goto fail;
|
3435 |
} |
3436 |
} else {
|
3437 |
addchar:
|
3438 |
if ((q - buf) < buf_size - 1) |
3439 |
*q++ = c; |
3440 |
} |
3441 |
} |
3442 |
if (!percentd_found)
|
3443 |
goto fail;
|
3444 |
*q = '\0';
|
3445 |
return 0; |
3446 |
fail:
|
3447 |
*q = '\0';
|
3448 |
return -1; |
3449 |
} |
3450 |
|
3451 |
static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size) |
3452 |
{ |
3453 |
int len, i, j, c;
|
3454 |
#undef fprintf
|
3455 |
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
3456 |
|
3457 |
for(i=0;i<size;i+=16) { |
3458 |
len = size - i; |
3459 |
if (len > 16) |
3460 |
len = 16;
|
3461 |
PRINT("%08x ", i);
|
3462 |
for(j=0;j<16;j++) { |
3463 |
if (j < len)
|
3464 |
PRINT(" %02x", buf[i+j]);
|
3465 |
else
|
3466 |
PRINT(" ");
|
3467 |
} |
3468 |
PRINT(" ");
|
3469 |
for(j=0;j<len;j++) { |
3470 |
c = buf[i+j]; |
3471 |
if (c < ' ' || c > '~') |
3472 |
c = '.';
|
3473 |
PRINT("%c", c);
|
3474 |
} |
3475 |
PRINT("\n");
|
3476 |
} |
3477 |
#undef PRINT
|
3478 |
} |
3479 |
|
3480 |
void av_hex_dump(FILE *f, uint8_t *buf, int size) |
3481 |
{ |
3482 |
hex_dump_internal(NULL, f, 0, buf, size); |
3483 |
} |
3484 |
|
3485 |
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size) |
3486 |
{ |
3487 |
hex_dump_internal(avcl, NULL, level, buf, size);
|
3488 |
} |
3489 |
|
3490 |
static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base) |
3491 |
{ |
3492 |
#undef fprintf
|
3493 |
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
3494 |
PRINT("stream #%d:\n", pkt->stream_index);
|
3495 |
PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0)); |
3496 |
PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
|
3497 |
/* DTS is _always_ valid after av_read_frame() */
|
3498 |
PRINT(" dts=");
|
3499 |
if (pkt->dts == AV_NOPTS_VALUE)
|
3500 |
PRINT("N/A");
|
3501 |
else
|
3502 |
PRINT("%0.3f", pkt->dts * av_q2d(time_base));
|
3503 |
/* PTS may not be known if B-frames are present. */
|
3504 |
PRINT(" pts=");
|
3505 |
if (pkt->pts == AV_NOPTS_VALUE)
|
3506 |
PRINT("N/A");
|
3507 |
else
|
3508 |
PRINT("%0.3f", pkt->pts * av_q2d(time_base));
|
3509 |
PRINT("\n");
|
3510 |
PRINT(" size=%d\n", pkt->size);
|
3511 |
#undef PRINT
|
3512 |
if (dump_payload)
|
3513 |
av_hex_dump(f, pkt->data, pkt->size); |
3514 |
} |
3515 |
|
3516 |
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload) |
3517 |
{ |
3518 |
AVRational tb = { 1, AV_TIME_BASE };
|
3519 |
pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb); |
3520 |
} |
3521 |
|
3522 |
void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st) |
3523 |
{ |
3524 |
pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base); |
3525 |
} |
3526 |
|
3527 |
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload) |
3528 |
{ |
3529 |
AVRational tb = { 1, AV_TIME_BASE };
|
3530 |
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
|
3531 |
} |
3532 |
|
3533 |
void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload, |
3534 |
AVStream *st) |
3535 |
{ |
3536 |
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
|
3537 |
} |
3538 |
|
3539 |
#if FF_API_URL_SPLIT
|
3540 |
attribute_deprecated |
3541 |
void ff_url_split(char *proto, int proto_size, |
3542 |
char *authorization, int authorization_size, |
3543 |
char *hostname, int hostname_size, |
3544 |
int *port_ptr,
|
3545 |
char *path, int path_size, |
3546 |
const char *url) |
3547 |
{ |
3548 |
av_url_split(proto, proto_size, |
3549 |
authorization, authorization_size, |
3550 |
hostname, hostname_size, |
3551 |
port_ptr, |
3552 |
path, path_size, |
3553 |
url); |
3554 |
} |
3555 |
#endif
|
3556 |
|
3557 |
void av_url_split(char *proto, int proto_size, |
3558 |
char *authorization, int authorization_size, |
3559 |
char *hostname, int hostname_size, |
3560 |
int *port_ptr,
|
3561 |
char *path, int path_size, |
3562 |
const char *url) |
3563 |
{ |
3564 |
const char *p, *ls, *at, *col, *brk; |
3565 |
|
3566 |
if (port_ptr) *port_ptr = -1; |
3567 |
if (proto_size > 0) proto[0] = 0; |
3568 |
if (authorization_size > 0) authorization[0] = 0; |
3569 |
if (hostname_size > 0) hostname[0] = 0; |
3570 |
if (path_size > 0) path[0] = 0; |
3571 |
|
3572 |
/* parse protocol */
|
3573 |
if ((p = strchr(url, ':'))) { |
3574 |
av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
|
3575 |
p++; /* skip ':' */
|
3576 |
if (*p == '/') p++; |
3577 |
if (*p == '/') p++; |
3578 |
} else {
|
3579 |
/* no protocol means plain filename */
|
3580 |
av_strlcpy(path, url, path_size); |
3581 |
return;
|
3582 |
} |
3583 |
|
3584 |
/* separate path from hostname */
|
3585 |
ls = strchr(p, '/');
|
3586 |
if(!ls)
|
3587 |
ls = strchr(p, '?');
|
3588 |
if(ls)
|
3589 |
av_strlcpy(path, ls, path_size); |
3590 |
else
|
3591 |
ls = &p[strlen(p)]; // XXX
|
3592 |
|
3593 |
/* the rest is hostname, use that to parse auth/port */
|
3594 |
if (ls != p) {
|
3595 |
/* authorization (user[:pass]@hostname) */
|
3596 |
if ((at = strchr(p, '@')) && at < ls) { |
3597 |
av_strlcpy(authorization, p, |
3598 |
FFMIN(authorization_size, at + 1 - p));
|
3599 |
p = at + 1; /* skip '@' */ |
3600 |
} |
3601 |
|
3602 |
if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { |
3603 |
/* [host]:port */
|
3604 |
av_strlcpy(hostname, p + 1,
|
3605 |
FFMIN(hostname_size, brk - p)); |
3606 |
if (brk[1] == ':' && port_ptr) |
3607 |
*port_ptr = atoi(brk + 2);
|
3608 |
} else if ((col = strchr(p, ':')) && col < ls) { |
3609 |
av_strlcpy(hostname, p, |
3610 |
FFMIN(col + 1 - p, hostname_size));
|
3611 |
if (port_ptr) *port_ptr = atoi(col + 1); |
3612 |
} else
|
3613 |
av_strlcpy(hostname, p, |
3614 |
FFMIN(ls + 1 - p, hostname_size));
|
3615 |
} |
3616 |
} |
3617 |
|
3618 |
char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase) |
3619 |
{ |
3620 |
int i;
|
3621 |
static const char hex_table_uc[16] = { '0', '1', '2', '3', |
3622 |
'4', '5', '6', '7', |
3623 |
'8', '9', 'A', 'B', |
3624 |
'C', 'D', 'E', 'F' }; |
3625 |
static const char hex_table_lc[16] = { '0', '1', '2', '3', |
3626 |
'4', '5', '6', '7', |
3627 |
'8', '9', 'a', 'b', |
3628 |
'c', 'd', 'e', 'f' }; |
3629 |
const char *hex_table = lowercase ? hex_table_lc : hex_table_uc; |
3630 |
|
3631 |
for(i = 0; i < s; i++) { |
3632 |
buff[i * 2] = hex_table[src[i] >> 4]; |
3633 |
buff[i * 2 + 1] = hex_table[src[i] & 0xF]; |
3634 |
} |
3635 |
|
3636 |
return buff;
|
3637 |
} |
3638 |
|
3639 |
int ff_hex_to_data(uint8_t *data, const char *p) |
3640 |
{ |
3641 |
int c, len, v;
|
3642 |
|
3643 |
len = 0;
|
3644 |
v = 1;
|
3645 |
for (;;) {
|
3646 |
p += strspn(p, SPACE_CHARS); |
3647 |
if (*p == '\0') |
3648 |
break;
|
3649 |
c = toupper((unsigned char) *p++); |
3650 |
if (c >= '0' && c <= '9') |
3651 |
c = c - '0';
|
3652 |
else if (c >= 'A' && c <= 'F') |
3653 |
c = c - 'A' + 10; |
3654 |
else
|
3655 |
break;
|
3656 |
v = (v << 4) | c;
|
3657 |
if (v & 0x100) { |
3658 |
if (data)
|
3659 |
data[len] = v; |
3660 |
len++; |
3661 |
v = 1;
|
3662 |
} |
3663 |
} |
3664 |
return len;
|
3665 |
} |
3666 |
|
3667 |
void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
3668 |
unsigned int pts_num, unsigned int pts_den) |
3669 |
{ |
3670 |
AVRational new_tb; |
3671 |
if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
|
3672 |
if(new_tb.num != pts_num)
|
3673 |
av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num); |
3674 |
}else
|
3675 |
av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index); |
3676 |
|
3677 |
if(new_tb.num <= 0 || new_tb.den <= 0) { |
3678 |
av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index); |
3679 |
return;
|
3680 |
} |
3681 |
s->time_base = new_tb; |
3682 |
s->pts_wrap_bits = pts_wrap_bits; |
3683 |
} |
3684 |
|
3685 |
int ff_url_join(char *str, int size, const char *proto, |
3686 |
const char *authorization, const char *hostname, |
3687 |
int port, const char *fmt, ...) |
3688 |
{ |
3689 |
#if CONFIG_NETWORK
|
3690 |
struct addrinfo hints, *ai;
|
3691 |
#endif
|
3692 |
|
3693 |
str[0] = '\0'; |
3694 |
if (proto)
|
3695 |
av_strlcatf(str, size, "%s://", proto);
|
3696 |
if (authorization && authorization[0]) |
3697 |
av_strlcatf(str, size, "%s@", authorization);
|
3698 |
#if CONFIG_NETWORK && defined(AF_INET6)
|
3699 |
/* Determine if hostname is a numerical IPv6 address,
|
3700 |
* properly escape it within [] in that case. */
|
3701 |
memset(&hints, 0, sizeof(hints)); |
3702 |
hints.ai_flags = AI_NUMERICHOST; |
3703 |
if (!getaddrinfo(hostname, NULL, &hints, &ai)) { |
3704 |
if (ai->ai_family == AF_INET6) {
|
3705 |
av_strlcat(str, "[", size);
|
3706 |
av_strlcat(str, hostname, size); |
3707 |
av_strlcat(str, "]", size);
|
3708 |
} else {
|
3709 |
av_strlcat(str, hostname, size); |
3710 |
} |
3711 |
freeaddrinfo(ai); |
3712 |
} else
|
3713 |
#endif
|
3714 |
/* Not an IPv6 address, just output the plain string. */
|
3715 |
av_strlcat(str, hostname, size); |
3716 |
|
3717 |
if (port >= 0) |
3718 |
av_strlcatf(str, size, ":%d", port);
|
3719 |
if (fmt) {
|
3720 |
va_list vl; |
3721 |
int len = strlen(str);
|
3722 |
|
3723 |
va_start(vl, fmt); |
3724 |
vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
|
3725 |
va_end(vl); |
3726 |
} |
3727 |
return strlen(str);
|
3728 |
} |
3729 |
|
3730 |
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, |
3731 |
AVFormatContext *src) |
3732 |
{ |
3733 |
AVPacket local_pkt; |
3734 |
|
3735 |
local_pkt = *pkt; |
3736 |
local_pkt.stream_index = dst_stream; |
3737 |
if (pkt->pts != AV_NOPTS_VALUE)
|
3738 |
local_pkt.pts = av_rescale_q(pkt->pts, |
3739 |
src->streams[pkt->stream_index]->time_base, |
3740 |
dst->streams[dst_stream]->time_base); |
3741 |
if (pkt->dts != AV_NOPTS_VALUE)
|
3742 |
local_pkt.dts = av_rescale_q(pkt->dts, |
3743 |
src->streams[pkt->stream_index]->time_base, |
3744 |
dst->streams[dst_stream]->time_base); |
3745 |
return av_write_frame(dst, &local_pkt);
|
3746 |
} |
3747 |
|
3748 |
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, |
3749 |
void *context)
|
3750 |
{ |
3751 |
const char *ptr = str; |
3752 |
|
3753 |
/* Parse key=value pairs. */
|
3754 |
for (;;) {
|
3755 |
const char *key; |
3756 |
char *dest = NULL, *dest_end; |
3757 |
int key_len, dest_len = 0; |
3758 |
|
3759 |
/* Skip whitespace and potential commas. */
|
3760 |
while (*ptr && (isspace(*ptr) || *ptr == ',')) |
3761 |
ptr++; |
3762 |
if (!*ptr)
|
3763 |
break;
|
3764 |
|
3765 |
key = ptr; |
3766 |
|
3767 |
if (!(ptr = strchr(key, '='))) |
3768 |
break;
|
3769 |
ptr++; |
3770 |
key_len = ptr - key; |
3771 |
|
3772 |
callback_get_buf(context, key, key_len, &dest, &dest_len); |
3773 |
dest_end = dest + dest_len - 1;
|
3774 |
|
3775 |
if (*ptr == '\"') { |
3776 |
ptr++; |
3777 |
while (*ptr && *ptr != '\"') { |
3778 |
if (*ptr == '\\') { |
3779 |
if (!ptr[1]) |
3780 |
break;
|
3781 |
if (dest && dest < dest_end)
|
3782 |
*dest++ = ptr[1];
|
3783 |
ptr += 2;
|
3784 |
} else {
|
3785 |
if (dest && dest < dest_end)
|
3786 |
*dest++ = *ptr; |
3787 |
ptr++; |
3788 |
} |
3789 |
} |
3790 |
if (*ptr == '\"') |
3791 |
ptr++; |
3792 |
} else {
|
3793 |
for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++) |
3794 |
if (dest && dest < dest_end)
|
3795 |
*dest++ = *ptr; |
3796 |
} |
3797 |
if (dest)
|
3798 |
*dest = 0;
|
3799 |
} |
3800 |
} |
3801 |
|
3802 |
int ff_find_stream_index(AVFormatContext *s, int id) |
3803 |
{ |
3804 |
int i;
|
3805 |
for (i = 0; i < s->nb_streams; i++) { |
3806 |
if (s->streams[i]->id == id)
|
3807 |
return i;
|
3808 |
} |
3809 |
return -1; |
3810 |
} |