ffmpeg / libavformat / utils.c @ 8e2fd8e1
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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 "internal.h" |
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#include "libavcodec/opt.h" |
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#include "metadata.h" |
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#include "libavutil/avstring.h" |
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#include "riff.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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#undef NDEBUG
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#include <assert.h> |
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/**
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* @file libavformat/utils.c
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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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/* 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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|
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/** head of registered input format linked list */
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AVInputFormat *first_iformat = NULL;
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/** head of registered output format linked list */
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AVOutputFormat *first_oformat = NULL;
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|
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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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|
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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 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; |
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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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|
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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); |
167 |
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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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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AVOutputFormat *fmt, *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 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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fmt = first_oformat; |
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while (fmt != NULL) { |
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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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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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fmt = fmt->next; |
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} |
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return fmt_found;
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} |
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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 = guess_format(short_name, filename, mime_type); |
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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 = 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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enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
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const char *filename, const char *mime_type, enum CodecType type){ |
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if(type == CODEC_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 == CODEC_TYPE_AUDIO) |
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return fmt->audio_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; |
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for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) { |
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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; |
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} |
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/* memory handling */
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void av_destruct_packet(AVPacket *pkt)
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{ |
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av_free(pkt->data); |
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pkt->data = NULL; pkt->size = 0; |
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} |
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void av_init_packet(AVPacket *pkt)
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{ |
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pkt->pts = AV_NOPTS_VALUE; |
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pkt->dts = AV_NOPTS_VALUE; |
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pkt->pos = -1;
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pkt->duration = 0;
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pkt->convergence_duration = 0;
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pkt->flags = 0;
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pkt->stream_index = 0;
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pkt->destruct= av_destruct_packet_nofree; |
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} |
278 |
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int av_new_packet(AVPacket *pkt, int size) |
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{ |
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uint8_t *data; |
282 |
if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) |
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return AVERROR(ENOMEM);
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data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); |
285 |
if (!data)
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return AVERROR(ENOMEM);
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memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
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av_init_packet(pkt); |
290 |
pkt->data = data; |
291 |
pkt->size = size; |
292 |
pkt->destruct = av_destruct_packet; |
293 |
return 0; |
294 |
} |
295 |
|
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int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size) |
297 |
{ |
298 |
int ret= av_new_packet(pkt, size);
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|
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if(ret<0) |
301 |
return ret;
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pkt->pos= url_ftell(s); |
304 |
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ret= get_buffer(s, pkt->data, size); |
306 |
if(ret<=0) |
307 |
av_free_packet(pkt); |
308 |
else
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pkt->size= ret; |
310 |
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return ret;
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} |
313 |
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int av_dup_packet(AVPacket *pkt)
|
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{ |
316 |
if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) { |
317 |
uint8_t *data; |
318 |
/* We duplicate the packet and don't forget to add the padding again. */
|
319 |
if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE) |
320 |
return AVERROR(ENOMEM);
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321 |
data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE); |
322 |
if (!data) {
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323 |
return AVERROR(ENOMEM);
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324 |
} |
325 |
memcpy(data, pkt->data, pkt->size); |
326 |
memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
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pkt->data = data; |
328 |
pkt->destruct = av_destruct_packet; |
329 |
} |
330 |
return 0; |
331 |
} |
332 |
|
333 |
int av_filename_number_test(const char *filename) |
334 |
{ |
335 |
char buf[1024]; |
336 |
return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0); |
337 |
} |
338 |
|
339 |
static AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) |
340 |
{ |
341 |
AVInputFormat *fmt1, *fmt; |
342 |
int score;
|
343 |
|
344 |
fmt = NULL;
|
345 |
for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) { |
346 |
if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
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347 |
continue;
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348 |
score = 0;
|
349 |
if (fmt1->read_probe) {
|
350 |
score = fmt1->read_probe(pd); |
351 |
} else if (fmt1->extensions) { |
352 |
if (match_ext(pd->filename, fmt1->extensions)) {
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353 |
score = 50;
|
354 |
} |
355 |
} |
356 |
if (score > *score_max) {
|
357 |
*score_max = score; |
358 |
fmt = fmt1; |
359 |
}else if (score == *score_max) |
360 |
fmt = NULL;
|
361 |
} |
362 |
return fmt;
|
363 |
} |
364 |
|
365 |
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
|
366 |
int score=0; |
367 |
return av_probe_input_format2(pd, is_opened, &score);
|
368 |
} |
369 |
|
370 |
static int set_codec_from_probe_data(AVStream *st, AVProbeData *pd, int score) |
371 |
{ |
372 |
AVInputFormat *fmt; |
373 |
fmt = av_probe_input_format2(pd, 1, &score);
|
374 |
|
375 |
if (fmt) {
|
376 |
if (!strcmp(fmt->name, "mp3")) { |
377 |
st->codec->codec_id = CODEC_ID_MP3; |
378 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
379 |
} else if (!strcmp(fmt->name, "ac3")) { |
380 |
st->codec->codec_id = CODEC_ID_AC3; |
381 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
382 |
} else if (!strcmp(fmt->name, "mpegvideo")) { |
383 |
st->codec->codec_id = CODEC_ID_MPEG2VIDEO; |
384 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
385 |
} else if (!strcmp(fmt->name, "m4v")) { |
386 |
st->codec->codec_id = CODEC_ID_MPEG4; |
387 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
388 |
} else if (!strcmp(fmt->name, "h264")) { |
389 |
st->codec->codec_id = CODEC_ID_H264; |
390 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
391 |
} |
392 |
} |
393 |
return !!fmt;
|
394 |
} |
395 |
|
396 |
/************************************************************/
|
397 |
/* input media file */
|
398 |
|
399 |
/**
|
400 |
* Open a media file from an IO stream. 'fmt' must be specified.
|
401 |
*/
|
402 |
int av_open_input_stream(AVFormatContext **ic_ptr,
|
403 |
ByteIOContext *pb, const char *filename, |
404 |
AVInputFormat *fmt, AVFormatParameters *ap) |
405 |
{ |
406 |
int err;
|
407 |
AVFormatContext *ic; |
408 |
AVFormatParameters default_ap; |
409 |
|
410 |
if(!ap){
|
411 |
ap=&default_ap; |
412 |
memset(ap, 0, sizeof(default_ap)); |
413 |
} |
414 |
|
415 |
if(!ap->prealloced_context)
|
416 |
ic = avformat_alloc_context(); |
417 |
else
|
418 |
ic = *ic_ptr; |
419 |
if (!ic) {
|
420 |
err = AVERROR(ENOMEM); |
421 |
goto fail;
|
422 |
} |
423 |
ic->iformat = fmt; |
424 |
ic->pb = pb; |
425 |
ic->duration = AV_NOPTS_VALUE; |
426 |
ic->start_time = AV_NOPTS_VALUE; |
427 |
av_strlcpy(ic->filename, filename, sizeof(ic->filename));
|
428 |
|
429 |
/* allocate private data */
|
430 |
if (fmt->priv_data_size > 0) { |
431 |
ic->priv_data = av_mallocz(fmt->priv_data_size); |
432 |
if (!ic->priv_data) {
|
433 |
err = AVERROR(ENOMEM); |
434 |
goto fail;
|
435 |
} |
436 |
} else {
|
437 |
ic->priv_data = NULL;
|
438 |
} |
439 |
|
440 |
if (ic->iformat->read_header) {
|
441 |
err = ic->iformat->read_header(ic, ap); |
442 |
if (err < 0) |
443 |
goto fail;
|
444 |
} |
445 |
|
446 |
if (pb && !ic->data_offset)
|
447 |
ic->data_offset = url_ftell(ic->pb); |
448 |
|
449 |
#if LIBAVFORMAT_VERSION_MAJOR < 53 |
450 |
ff_metadata_demux_compat(ic); |
451 |
#endif
|
452 |
|
453 |
*ic_ptr = ic; |
454 |
return 0; |
455 |
fail:
|
456 |
if (ic) {
|
457 |
int i;
|
458 |
av_freep(&ic->priv_data); |
459 |
for(i=0;i<ic->nb_streams;i++) { |
460 |
AVStream *st = ic->streams[i]; |
461 |
if (st) {
|
462 |
av_free(st->priv_data); |
463 |
av_free(st->codec->extradata); |
464 |
} |
465 |
av_free(st); |
466 |
} |
467 |
} |
468 |
av_free(ic); |
469 |
*ic_ptr = NULL;
|
470 |
return err;
|
471 |
} |
472 |
|
473 |
/** size of probe buffer, for guessing file type from file contents */
|
474 |
#define PROBE_BUF_MIN 2048 |
475 |
#define PROBE_BUF_MAX (1<<20) |
476 |
|
477 |
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, |
478 |
AVInputFormat *fmt, |
479 |
int buf_size,
|
480 |
AVFormatParameters *ap) |
481 |
{ |
482 |
int err, probe_size;
|
483 |
AVProbeData probe_data, *pd = &probe_data; |
484 |
ByteIOContext *pb = NULL;
|
485 |
|
486 |
pd->filename = "";
|
487 |
if (filename)
|
488 |
pd->filename = filename; |
489 |
pd->buf = NULL;
|
490 |
pd->buf_size = 0;
|
491 |
|
492 |
if (!fmt) {
|
493 |
/* guess format if no file can be opened */
|
494 |
fmt = av_probe_input_format(pd, 0);
|
495 |
} |
496 |
|
497 |
/* Do not open file if the format does not need it. XXX: specific
|
498 |
hack needed to handle RTSP/TCP */
|
499 |
if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
|
500 |
/* if no file needed do not try to open one */
|
501 |
if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) { |
502 |
goto fail;
|
503 |
} |
504 |
if (buf_size > 0) { |
505 |
url_setbufsize(pb, buf_size); |
506 |
} |
507 |
|
508 |
for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){ |
509 |
int score= probe_size < PROBE_BUF_MAX ? AVPROBE_SCORE_MAX/4 : 0; |
510 |
/* read probe data */
|
511 |
pd->buf= av_realloc(pd->buf, probe_size + AVPROBE_PADDING_SIZE); |
512 |
pd->buf_size = get_buffer(pb, pd->buf, probe_size); |
513 |
memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
|
514 |
if (url_fseek(pb, 0, SEEK_SET) < 0) { |
515 |
url_fclose(pb); |
516 |
if (url_fopen(&pb, filename, URL_RDONLY) < 0) { |
517 |
pb = NULL;
|
518 |
err = AVERROR(EIO); |
519 |
goto fail;
|
520 |
} |
521 |
} |
522 |
/* guess file format */
|
523 |
fmt = av_probe_input_format2(pd, 1, &score);
|
524 |
} |
525 |
av_freep(&pd->buf); |
526 |
} |
527 |
|
528 |
/* if still no format found, error */
|
529 |
if (!fmt) {
|
530 |
err = AVERROR_NOFMT; |
531 |
goto fail;
|
532 |
} |
533 |
|
534 |
/* check filename in case an image number is expected */
|
535 |
if (fmt->flags & AVFMT_NEEDNUMBER) {
|
536 |
if (!av_filename_number_test(filename)) {
|
537 |
err = AVERROR_NUMEXPECTED; |
538 |
goto fail;
|
539 |
} |
540 |
} |
541 |
err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap); |
542 |
if (err)
|
543 |
goto fail;
|
544 |
return 0; |
545 |
fail:
|
546 |
av_freep(&pd->buf); |
547 |
if (pb)
|
548 |
url_fclose(pb); |
549 |
*ic_ptr = NULL;
|
550 |
return err;
|
551 |
|
552 |
} |
553 |
|
554 |
/*******************************************************/
|
555 |
|
556 |
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
|
557 |
AVPacketList **plast_pktl){ |
558 |
AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
|
559 |
if (!pktl)
|
560 |
return NULL; |
561 |
|
562 |
if (*packet_buffer)
|
563 |
(*plast_pktl)->next = pktl; |
564 |
else
|
565 |
*packet_buffer = pktl; |
566 |
|
567 |
/* add the packet in the buffered packet list */
|
568 |
*plast_pktl = pktl; |
569 |
pktl->pkt= *pkt; |
570 |
return &pktl->pkt;
|
571 |
} |
572 |
|
573 |
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
|
574 |
{ |
575 |
int ret;
|
576 |
AVStream *st; |
577 |
|
578 |
for(;;){
|
579 |
AVPacketList *pktl = s->raw_packet_buffer; |
580 |
|
581 |
if (pktl) {
|
582 |
*pkt = pktl->pkt; |
583 |
if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE){
|
584 |
s->raw_packet_buffer = pktl->next; |
585 |
av_free(pktl); |
586 |
return 0; |
587 |
} |
588 |
} |
589 |
|
590 |
av_init_packet(pkt); |
591 |
ret= s->iformat->read_packet(s, pkt); |
592 |
if (ret < 0) |
593 |
return ret;
|
594 |
st= s->streams[pkt->stream_index]; |
595 |
|
596 |
switch(st->codec->codec_type){
|
597 |
case CODEC_TYPE_VIDEO:
|
598 |
if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
|
599 |
break;
|
600 |
case CODEC_TYPE_AUDIO:
|
601 |
if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
|
602 |
break;
|
603 |
case CODEC_TYPE_SUBTITLE:
|
604 |
if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
|
605 |
break;
|
606 |
} |
607 |
|
608 |
if(!pktl && st->codec->codec_id!=CODEC_ID_PROBE)
|
609 |
return ret;
|
610 |
|
611 |
add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); |
612 |
|
613 |
if(st->codec->codec_id == CODEC_ID_PROBE){
|
614 |
AVProbeData *pd = &st->probe_data; |
615 |
|
616 |
pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); |
617 |
memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size); |
618 |
pd->buf_size += pkt->size; |
619 |
memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
|
620 |
|
621 |
if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
|
622 |
set_codec_from_probe_data(st, pd, 1);
|
623 |
if(st->codec->codec_id != CODEC_ID_PROBE){
|
624 |
pd->buf_size=0;
|
625 |
av_freep(&pd->buf); |
626 |
} |
627 |
} |
628 |
} |
629 |
} |
630 |
} |
631 |
|
632 |
/**********************************************************/
|
633 |
|
634 |
/**
|
635 |
* Get the number of samples of an audio frame. Return -1 on error.
|
636 |
*/
|
637 |
static int get_audio_frame_size(AVCodecContext *enc, int size) |
638 |
{ |
639 |
int frame_size;
|
640 |
|
641 |
if(enc->codec_id == CODEC_ID_VORBIS)
|
642 |
return -1; |
643 |
|
644 |
if (enc->frame_size <= 1) { |
645 |
int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
|
646 |
|
647 |
if (bits_per_sample) {
|
648 |
if (enc->channels == 0) |
649 |
return -1; |
650 |
frame_size = (size << 3) / (bits_per_sample * enc->channels);
|
651 |
} else {
|
652 |
/* used for example by ADPCM codecs */
|
653 |
if (enc->bit_rate == 0) |
654 |
return -1; |
655 |
frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate;
|
656 |
} |
657 |
} else {
|
658 |
frame_size = enc->frame_size; |
659 |
} |
660 |
return frame_size;
|
661 |
} |
662 |
|
663 |
|
664 |
/**
|
665 |
* Return the frame duration in seconds. Return 0 if not available.
|
666 |
*/
|
667 |
static void compute_frame_duration(int *pnum, int *pden, AVStream *st, |
668 |
AVCodecParserContext *pc, AVPacket *pkt) |
669 |
{ |
670 |
int frame_size;
|
671 |
|
672 |
*pnum = 0;
|
673 |
*pden = 0;
|
674 |
switch(st->codec->codec_type) {
|
675 |
case CODEC_TYPE_VIDEO:
|
676 |
if(st->time_base.num*1000LL > st->time_base.den){ |
677 |
*pnum = st->time_base.num; |
678 |
*pden = st->time_base.den; |
679 |
}else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){ |
680 |
*pnum = st->codec->time_base.num; |
681 |
*pden = st->codec->time_base.den; |
682 |
if (pc && pc->repeat_pict) {
|
683 |
*pden *= 2;
|
684 |
*pnum = (*pnum) * (2 + pc->repeat_pict);
|
685 |
} |
686 |
} |
687 |
break;
|
688 |
case CODEC_TYPE_AUDIO:
|
689 |
frame_size = get_audio_frame_size(st->codec, pkt->size); |
690 |
if (frame_size < 0) |
691 |
break;
|
692 |
*pnum = frame_size; |
693 |
*pden = st->codec->sample_rate; |
694 |
break;
|
695 |
default:
|
696 |
break;
|
697 |
} |
698 |
} |
699 |
|
700 |
static int is_intra_only(AVCodecContext *enc){ |
701 |
if(enc->codec_type == CODEC_TYPE_AUDIO){
|
702 |
return 1; |
703 |
}else if(enc->codec_type == CODEC_TYPE_VIDEO){ |
704 |
switch(enc->codec_id){
|
705 |
case CODEC_ID_MJPEG:
|
706 |
case CODEC_ID_MJPEGB:
|
707 |
case CODEC_ID_LJPEG:
|
708 |
case CODEC_ID_RAWVIDEO:
|
709 |
case CODEC_ID_DVVIDEO:
|
710 |
case CODEC_ID_HUFFYUV:
|
711 |
case CODEC_ID_FFVHUFF:
|
712 |
case CODEC_ID_ASV1:
|
713 |
case CODEC_ID_ASV2:
|
714 |
case CODEC_ID_VCR1:
|
715 |
case CODEC_ID_DNXHD:
|
716 |
case CODEC_ID_JPEG2000:
|
717 |
return 1; |
718 |
default: break; |
719 |
} |
720 |
} |
721 |
return 0; |
722 |
} |
723 |
|
724 |
static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
725 |
int64_t dts, int64_t pts) |
726 |
{ |
727 |
AVStream *st= s->streams[stream_index]; |
728 |
AVPacketList *pktl= s->packet_buffer; |
729 |
|
730 |
if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
|
731 |
return;
|
732 |
|
733 |
st->first_dts= dts - st->cur_dts; |
734 |
st->cur_dts= dts; |
735 |
|
736 |
for(; pktl; pktl= pktl->next){
|
737 |
if(pktl->pkt.stream_index != stream_index)
|
738 |
continue;
|
739 |
//FIXME think more about this check
|
740 |
if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
|
741 |
pktl->pkt.pts += st->first_dts; |
742 |
|
743 |
if(pktl->pkt.dts != AV_NOPTS_VALUE)
|
744 |
pktl->pkt.dts += st->first_dts; |
745 |
|
746 |
if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
|
747 |
st->start_time= pktl->pkt.pts; |
748 |
} |
749 |
if (st->start_time == AV_NOPTS_VALUE)
|
750 |
st->start_time = pts; |
751 |
} |
752 |
|
753 |
static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt) |
754 |
{ |
755 |
AVPacketList *pktl= s->packet_buffer; |
756 |
int64_t cur_dts= 0;
|
757 |
|
758 |
if(st->first_dts != AV_NOPTS_VALUE){
|
759 |
cur_dts= st->first_dts; |
760 |
for(; pktl; pktl= pktl->next){
|
761 |
if(pktl->pkt.stream_index == pkt->stream_index){
|
762 |
if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
|
763 |
break;
|
764 |
cur_dts -= pkt->duration; |
765 |
} |
766 |
} |
767 |
pktl= s->packet_buffer; |
768 |
st->first_dts = cur_dts; |
769 |
}else if(st->cur_dts) |
770 |
return;
|
771 |
|
772 |
for(; pktl; pktl= pktl->next){
|
773 |
if(pktl->pkt.stream_index != pkt->stream_index)
|
774 |
continue;
|
775 |
if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
|
776 |
&& !pktl->pkt.duration){ |
777 |
pktl->pkt.dts= cur_dts; |
778 |
if(!st->codec->has_b_frames)
|
779 |
pktl->pkt.pts= cur_dts; |
780 |
cur_dts += pkt->duration; |
781 |
pktl->pkt.duration= pkt->duration; |
782 |
}else
|
783 |
break;
|
784 |
} |
785 |
if(st->first_dts == AV_NOPTS_VALUE)
|
786 |
st->cur_dts= cur_dts; |
787 |
} |
788 |
|
789 |
static void compute_pkt_fields(AVFormatContext *s, AVStream *st, |
790 |
AVCodecParserContext *pc, AVPacket *pkt) |
791 |
{ |
792 |
int num, den, presentation_delayed, delay, i;
|
793 |
int64_t offset; |
794 |
|
795 |
/* do we have a video B-frame ? */
|
796 |
delay= st->codec->has_b_frames; |
797 |
presentation_delayed = 0;
|
798 |
/* XXX: need has_b_frame, but cannot get it if the codec is
|
799 |
not initialized */
|
800 |
if (delay &&
|
801 |
pc && pc->pict_type != FF_B_TYPE) |
802 |
presentation_delayed = 1;
|
803 |
|
804 |
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63 |
805 |
/*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
|
806 |
pkt->dts -= 1LL<<st->pts_wrap_bits;
|
807 |
} |
808 |
|
809 |
// some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
|
810 |
// we take the conservative approach and discard both
|
811 |
// Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
|
812 |
if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){ |
813 |
av_log(s, AV_LOG_ERROR, "invalid dts/pts combination\n");
|
814 |
pkt->dts= pkt->pts= AV_NOPTS_VALUE; |
815 |
} |
816 |
|
817 |
if (pkt->duration == 0) { |
818 |
compute_frame_duration(&num, &den, st, pc, pkt); |
819 |
if (den && num) {
|
820 |
pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
|
821 |
|
822 |
if(pkt->duration != 0 && s->packet_buffer) |
823 |
update_initial_durations(s, st, pkt); |
824 |
} |
825 |
} |
826 |
|
827 |
/* correct timestamps with byte offset if demuxers only have timestamps
|
828 |
on packet boundaries */
|
829 |
if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
|
830 |
/* this will estimate bitrate based on this frame's duration and size */
|
831 |
offset = av_rescale(pc->offset, pkt->duration, pkt->size); |
832 |
if(pkt->pts != AV_NOPTS_VALUE)
|
833 |
pkt->pts += offset; |
834 |
if(pkt->dts != AV_NOPTS_VALUE)
|
835 |
pkt->dts += offset; |
836 |
} |
837 |
|
838 |
/* This may be redundant, but it should not hurt. */
|
839 |
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
|
840 |
presentation_delayed = 1;
|
841 |
|
842 |
// 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);
|
843 |
/* interpolate PTS and DTS if they are not present */
|
844 |
if(delay==0 || (delay==1 && pc)){ |
845 |
if (presentation_delayed) {
|
846 |
/* DTS = decompression timestamp */
|
847 |
/* PTS = presentation timestamp */
|
848 |
if (pkt->dts == AV_NOPTS_VALUE)
|
849 |
pkt->dts = st->last_IP_pts; |
850 |
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); |
851 |
if (pkt->dts == AV_NOPTS_VALUE)
|
852 |
pkt->dts = st->cur_dts; |
853 |
|
854 |
/* this is tricky: the dts must be incremented by the duration
|
855 |
of the frame we are displaying, i.e. the last I- or P-frame */
|
856 |
if (st->last_IP_duration == 0) |
857 |
st->last_IP_duration = pkt->duration; |
858 |
if(pkt->dts != AV_NOPTS_VALUE)
|
859 |
st->cur_dts = pkt->dts + st->last_IP_duration; |
860 |
st->last_IP_duration = pkt->duration; |
861 |
st->last_IP_pts= pkt->pts; |
862 |
/* cannot compute PTS if not present (we can compute it only
|
863 |
by knowing the future */
|
864 |
} else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){ |
865 |
if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
|
866 |
int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts); |
867 |
int64_t new_diff= FFABS(st->cur_dts - pkt->pts); |
868 |
if(old_diff < new_diff && old_diff < (pkt->duration>>3)){ |
869 |
pkt->pts += pkt->duration; |
870 |
// 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);
|
871 |
} |
872 |
} |
873 |
|
874 |
/* presentation is not delayed : PTS and DTS are the same */
|
875 |
if(pkt->pts == AV_NOPTS_VALUE)
|
876 |
pkt->pts = pkt->dts; |
877 |
update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts); |
878 |
if(pkt->pts == AV_NOPTS_VALUE)
|
879 |
pkt->pts = st->cur_dts; |
880 |
pkt->dts = pkt->pts; |
881 |
if(pkt->pts != AV_NOPTS_VALUE)
|
882 |
st->cur_dts = pkt->pts + pkt->duration; |
883 |
} |
884 |
} |
885 |
|
886 |
if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
|
887 |
st->pts_buffer[0]= pkt->pts;
|
888 |
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
889 |
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
|
890 |
if(pkt->dts == AV_NOPTS_VALUE)
|
891 |
pkt->dts= st->pts_buffer[0];
|
892 |
if(delay>1){ |
893 |
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
|
894 |
} |
895 |
if(pkt->dts > st->cur_dts)
|
896 |
st->cur_dts = pkt->dts; |
897 |
} |
898 |
|
899 |
// 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);
|
900 |
|
901 |
/* update flags */
|
902 |
if(is_intra_only(st->codec))
|
903 |
pkt->flags |= PKT_FLAG_KEY; |
904 |
else if (pc) { |
905 |
pkt->flags = 0;
|
906 |
/* keyframe computation */
|
907 |
if (pc->pict_type == FF_I_TYPE)
|
908 |
pkt->flags |= PKT_FLAG_KEY; |
909 |
} |
910 |
} |
911 |
|
912 |
void av_destruct_packet_nofree(AVPacket *pkt)
|
913 |
{ |
914 |
pkt->data = NULL; pkt->size = 0; |
915 |
} |
916 |
|
917 |
static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
918 |
{ |
919 |
AVStream *st; |
920 |
int len, ret, i;
|
921 |
|
922 |
av_init_packet(pkt); |
923 |
|
924 |
for(;;) {
|
925 |
/* select current input stream component */
|
926 |
st = s->cur_st; |
927 |
if (st) {
|
928 |
if (!st->need_parsing || !st->parser) {
|
929 |
/* no parsing needed: we just output the packet as is */
|
930 |
/* raw data support */
|
931 |
*pkt = st->cur_pkt; st->cur_pkt.data= NULL;
|
932 |
compute_pkt_fields(s, st, NULL, pkt);
|
933 |
s->cur_st = NULL;
|
934 |
break;
|
935 |
} else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) { |
936 |
len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size, |
937 |
st->cur_ptr, st->cur_len, |
938 |
st->cur_pkt.pts, st->cur_pkt.dts); |
939 |
st->cur_pkt.pts = AV_NOPTS_VALUE; |
940 |
st->cur_pkt.dts = AV_NOPTS_VALUE; |
941 |
/* increment read pointer */
|
942 |
st->cur_ptr += len; |
943 |
st->cur_len -= len; |
944 |
|
945 |
/* return packet if any */
|
946 |
if (pkt->size) {
|
947 |
pkt->pos = st->cur_pkt.pos; // Isn't quite accurate but close.
|
948 |
got_packet:
|
949 |
pkt->duration = 0;
|
950 |
pkt->stream_index = st->index; |
951 |
pkt->pts = st->parser->pts; |
952 |
pkt->dts = st->parser->dts; |
953 |
pkt->destruct = av_destruct_packet_nofree; |
954 |
compute_pkt_fields(s, st, st->parser, pkt); |
955 |
|
956 |
if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & PKT_FLAG_KEY){
|
957 |
ff_reduce_index(s, st->index); |
958 |
av_add_index_entry(st, st->parser->frame_offset, pkt->dts, |
959 |
0, 0, AVINDEX_KEYFRAME); |
960 |
} |
961 |
|
962 |
break;
|
963 |
} |
964 |
} else {
|
965 |
/* free packet */
|
966 |
av_free_packet(&st->cur_pkt); |
967 |
s->cur_st = NULL;
|
968 |
} |
969 |
} else {
|
970 |
AVPacket cur_pkt; |
971 |
/* read next packet */
|
972 |
ret = av_read_packet(s, &cur_pkt); |
973 |
if (ret < 0) { |
974 |
if (ret == AVERROR(EAGAIN))
|
975 |
return ret;
|
976 |
/* return the last frames, if any */
|
977 |
for(i = 0; i < s->nb_streams; i++) { |
978 |
st = s->streams[i]; |
979 |
if (st->parser && st->need_parsing) {
|
980 |
av_parser_parse(st->parser, st->codec, |
981 |
&pkt->data, &pkt->size, |
982 |
NULL, 0, |
983 |
AV_NOPTS_VALUE, AV_NOPTS_VALUE); |
984 |
if (pkt->size)
|
985 |
goto got_packet;
|
986 |
} |
987 |
} |
988 |
/* no more packets: really terminate parsing */
|
989 |
return ret;
|
990 |
} |
991 |
st = s->streams[cur_pkt.stream_index]; |
992 |
st->cur_pkt= cur_pkt; |
993 |
|
994 |
if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
|
995 |
st->cur_pkt.dts != AV_NOPTS_VALUE && |
996 |
st->cur_pkt.pts < st->cur_pkt.dts){ |
997 |
av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n", |
998 |
st->cur_pkt.stream_index, |
999 |
st->cur_pkt.pts, |
1000 |
st->cur_pkt.dts, |
1001 |
st->cur_pkt.size); |
1002 |
// av_free_packet(&st->cur_pkt);
|
1003 |
// return -1;
|
1004 |
} |
1005 |
|
1006 |
if(s->debug & FF_FDEBUG_TS)
|
1007 |
av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, flags=%d\n", |
1008 |
st->cur_pkt.stream_index, |
1009 |
st->cur_pkt.pts, |
1010 |
st->cur_pkt.dts, |
1011 |
st->cur_pkt.size, |
1012 |
st->cur_pkt.flags); |
1013 |
|
1014 |
s->cur_st = st; |
1015 |
st->cur_ptr = st->cur_pkt.data; |
1016 |
st->cur_len = st->cur_pkt.size; |
1017 |
if (st->need_parsing && !st->parser) {
|
1018 |
st->parser = av_parser_init(st->codec->codec_id); |
1019 |
if (!st->parser) {
|
1020 |
/* no parser available: just output the raw packets */
|
1021 |
st->need_parsing = AVSTREAM_PARSE_NONE; |
1022 |
}else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){ |
1023 |
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
1024 |
} |
1025 |
if(st->parser && (s->iformat->flags & AVFMT_GENERIC_INDEX)){
|
1026 |
st->parser->next_frame_offset= |
1027 |
st->parser->cur_offset= st->cur_pkt.pos; |
1028 |
} |
1029 |
} |
1030 |
} |
1031 |
} |
1032 |
if(s->debug & FF_FDEBUG_TS)
|
1033 |
av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, flags=%d\n", |
1034 |
pkt->stream_index, |
1035 |
pkt->pts, |
1036 |
pkt->dts, |
1037 |
pkt->size, |
1038 |
pkt->flags); |
1039 |
|
1040 |
return 0; |
1041 |
} |
1042 |
|
1043 |
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
|
1044 |
{ |
1045 |
AVPacketList *pktl; |
1046 |
int eof=0; |
1047 |
const int genpts= s->flags & AVFMT_FLAG_GENPTS; |
1048 |
|
1049 |
for(;;){
|
1050 |
pktl = s->packet_buffer; |
1051 |
if (pktl) {
|
1052 |
AVPacket *next_pkt= &pktl->pkt; |
1053 |
|
1054 |
if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
|
1055 |
while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
|
1056 |
if( pktl->pkt.stream_index == next_pkt->stream_index
|
1057 |
&& next_pkt->dts < pktl->pkt.dts |
1058 |
&& pktl->pkt.pts != pktl->pkt.dts //not b frame
|
1059 |
/*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){
|
1060 |
next_pkt->pts= pktl->pkt.dts; |
1061 |
} |
1062 |
pktl= pktl->next; |
1063 |
} |
1064 |
pktl = s->packet_buffer; |
1065 |
} |
1066 |
|
1067 |
if( next_pkt->pts != AV_NOPTS_VALUE
|
1068 |
|| next_pkt->dts == AV_NOPTS_VALUE |
1069 |
|| !genpts || eof){ |
1070 |
/* read packet from packet buffer, if there is data */
|
1071 |
*pkt = *next_pkt; |
1072 |
s->packet_buffer = pktl->next; |
1073 |
av_free(pktl); |
1074 |
return 0; |
1075 |
} |
1076 |
} |
1077 |
if(genpts){
|
1078 |
int ret= av_read_frame_internal(s, pkt);
|
1079 |
if(ret<0){ |
1080 |
if(pktl && ret != AVERROR(EAGAIN)){
|
1081 |
eof=1;
|
1082 |
continue;
|
1083 |
}else
|
1084 |
return ret;
|
1085 |
} |
1086 |
|
1087 |
if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
|
1088 |
&s->packet_buffer_end)) < 0)
|
1089 |
return AVERROR(ENOMEM);
|
1090 |
}else{
|
1091 |
assert(!s->packet_buffer); |
1092 |
return av_read_frame_internal(s, pkt);
|
1093 |
} |
1094 |
} |
1095 |
} |
1096 |
|
1097 |
/* XXX: suppress the packet queue */
|
1098 |
static void flush_packet_queue(AVFormatContext *s) |
1099 |
{ |
1100 |
AVPacketList *pktl; |
1101 |
|
1102 |
for(;;) {
|
1103 |
pktl = s->packet_buffer; |
1104 |
if (!pktl)
|
1105 |
break;
|
1106 |
s->packet_buffer = pktl->next; |
1107 |
av_free_packet(&pktl->pkt); |
1108 |
av_free(pktl); |
1109 |
} |
1110 |
} |
1111 |
|
1112 |
/*******************************************************/
|
1113 |
/* seek support */
|
1114 |
|
1115 |
int av_find_default_stream_index(AVFormatContext *s)
|
1116 |
{ |
1117 |
int first_audio_index = -1; |
1118 |
int i;
|
1119 |
AVStream *st; |
1120 |
|
1121 |
if (s->nb_streams <= 0) |
1122 |
return -1; |
1123 |
for(i = 0; i < s->nb_streams; i++) { |
1124 |
st = s->streams[i]; |
1125 |
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
1126 |
return i;
|
1127 |
} |
1128 |
if (first_audio_index < 0 && st->codec->codec_type == CODEC_TYPE_AUDIO) |
1129 |
first_audio_index = i; |
1130 |
} |
1131 |
return first_audio_index >= 0 ? first_audio_index : 0; |
1132 |
} |
1133 |
|
1134 |
/**
|
1135 |
* Flush the frame reader.
|
1136 |
*/
|
1137 |
static void av_read_frame_flush(AVFormatContext *s) |
1138 |
{ |
1139 |
AVStream *st; |
1140 |
int i;
|
1141 |
|
1142 |
flush_packet_queue(s); |
1143 |
|
1144 |
s->cur_st = NULL;
|
1145 |
|
1146 |
/* for each stream, reset read state */
|
1147 |
for(i = 0; i < s->nb_streams; i++) { |
1148 |
st = s->streams[i]; |
1149 |
|
1150 |
if (st->parser) {
|
1151 |
av_parser_close(st->parser); |
1152 |
st->parser = NULL;
|
1153 |
av_free_packet(&st->cur_pkt); |
1154 |
} |
1155 |
st->last_IP_pts = AV_NOPTS_VALUE; |
1156 |
st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
|
1157 |
/* fail safe */
|
1158 |
st->cur_ptr = NULL;
|
1159 |
st->cur_len = 0;
|
1160 |
} |
1161 |
} |
1162 |
|
1163 |
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
|
1164 |
int i;
|
1165 |
|
1166 |
for(i = 0; i < s->nb_streams; i++) { |
1167 |
AVStream *st = s->streams[i]; |
1168 |
|
1169 |
st->cur_dts = av_rescale(timestamp, |
1170 |
st->time_base.den * (int64_t)ref_st->time_base.num, |
1171 |
st->time_base.num * (int64_t)ref_st->time_base.den); |
1172 |
} |
1173 |
} |
1174 |
|
1175 |
void ff_reduce_index(AVFormatContext *s, int stream_index) |
1176 |
{ |
1177 |
AVStream *st= s->streams[stream_index]; |
1178 |
unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry); |
1179 |
|
1180 |
if((unsigned)st->nb_index_entries >= max_entries){ |
1181 |
int i;
|
1182 |
for(i=0; 2*i<st->nb_index_entries; i++) |
1183 |
st->index_entries[i]= st->index_entries[2*i];
|
1184 |
st->nb_index_entries= i; |
1185 |
} |
1186 |
} |
1187 |
|
1188 |
int av_add_index_entry(AVStream *st,
|
1189 |
int64_t pos, int64_t timestamp, int size, int distance, int flags) |
1190 |
{ |
1191 |
AVIndexEntry *entries, *ie; |
1192 |
int index;
|
1193 |
|
1194 |
if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) |
1195 |
return -1; |
1196 |
|
1197 |
entries = av_fast_realloc(st->index_entries, |
1198 |
&st->index_entries_allocated_size, |
1199 |
(st->nb_index_entries + 1) *
|
1200 |
sizeof(AVIndexEntry));
|
1201 |
if(!entries)
|
1202 |
return -1; |
1203 |
|
1204 |
st->index_entries= entries; |
1205 |
|
1206 |
index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY); |
1207 |
|
1208 |
if(index<0){ |
1209 |
index= st->nb_index_entries++; |
1210 |
ie= &entries[index]; |
1211 |
assert(index==0 || ie[-1].timestamp < timestamp); |
1212 |
}else{
|
1213 |
ie= &entries[index]; |
1214 |
if(ie->timestamp != timestamp){
|
1215 |
if(ie->timestamp <= timestamp)
|
1216 |
return -1; |
1217 |
memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index)); |
1218 |
st->nb_index_entries++; |
1219 |
}else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance |
1220 |
distance= ie->min_distance; |
1221 |
} |
1222 |
|
1223 |
ie->pos = pos; |
1224 |
ie->timestamp = timestamp; |
1225 |
ie->min_distance= distance; |
1226 |
ie->size= size; |
1227 |
ie->flags = flags; |
1228 |
|
1229 |
return index;
|
1230 |
} |
1231 |
|
1232 |
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
|
1233 |
int flags)
|
1234 |
{ |
1235 |
AVIndexEntry *entries= st->index_entries; |
1236 |
int nb_entries= st->nb_index_entries;
|
1237 |
int a, b, m;
|
1238 |
int64_t timestamp; |
1239 |
|
1240 |
a = - 1;
|
1241 |
b = nb_entries; |
1242 |
|
1243 |
while (b - a > 1) { |
1244 |
m = (a + b) >> 1;
|
1245 |
timestamp = entries[m].timestamp; |
1246 |
if(timestamp >= wanted_timestamp)
|
1247 |
b = m; |
1248 |
if(timestamp <= wanted_timestamp)
|
1249 |
a = m; |
1250 |
} |
1251 |
m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b; |
1252 |
|
1253 |
if(!(flags & AVSEEK_FLAG_ANY)){
|
1254 |
while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){ |
1255 |
m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; |
1256 |
} |
1257 |
} |
1258 |
|
1259 |
if(m == nb_entries)
|
1260 |
return -1; |
1261 |
return m;
|
1262 |
} |
1263 |
|
1264 |
#define DEBUG_SEEK
|
1265 |
|
1266 |
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){ |
1267 |
AVInputFormat *avif= s->iformat; |
1268 |
int64_t pos_min, pos_max, pos, pos_limit; |
1269 |
int64_t ts_min, ts_max, ts; |
1270 |
int index;
|
1271 |
AVStream *st; |
1272 |
|
1273 |
if (stream_index < 0) |
1274 |
return -1; |
1275 |
|
1276 |
#ifdef DEBUG_SEEK
|
1277 |
av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts); |
1278 |
#endif
|
1279 |
|
1280 |
ts_max= |
1281 |
ts_min= AV_NOPTS_VALUE; |
1282 |
pos_limit= -1; //gcc falsely says it may be uninitialized |
1283 |
|
1284 |
st= s->streams[stream_index]; |
1285 |
if(st->index_entries){
|
1286 |
AVIndexEntry *e; |
1287 |
|
1288 |
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()
|
1289 |
index= FFMAX(index, 0);
|
1290 |
e= &st->index_entries[index]; |
1291 |
|
1292 |
if(e->timestamp <= target_ts || e->pos == e->min_distance){
|
1293 |
pos_min= e->pos; |
1294 |
ts_min= e->timestamp; |
1295 |
#ifdef DEBUG_SEEK
|
1296 |
av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n", |
1297 |
pos_min,ts_min); |
1298 |
#endif
|
1299 |
}else{
|
1300 |
assert(index==0);
|
1301 |
} |
1302 |
|
1303 |
index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD); |
1304 |
assert(index < st->nb_index_entries); |
1305 |
if(index >= 0){ |
1306 |
e= &st->index_entries[index]; |
1307 |
assert(e->timestamp >= target_ts); |
1308 |
pos_max= e->pos; |
1309 |
ts_max= e->timestamp; |
1310 |
pos_limit= pos_max - e->min_distance; |
1311 |
#ifdef DEBUG_SEEK
|
1312 |
av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n", |
1313 |
pos_max,pos_limit, ts_max); |
1314 |
#endif
|
1315 |
} |
1316 |
} |
1317 |
|
1318 |
pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp); |
1319 |
if(pos<0) |
1320 |
return -1; |
1321 |
|
1322 |
/* do the seek */
|
1323 |
url_fseek(s->pb, pos, SEEK_SET); |
1324 |
|
1325 |
av_update_cur_dts(s, st, ts); |
1326 |
|
1327 |
return 0; |
1328 |
} |
1329 |
|
1330 |
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 )){ |
1331 |
int64_t pos, ts; |
1332 |
int64_t start_pos, filesize; |
1333 |
int no_change;
|
1334 |
|
1335 |
#ifdef DEBUG_SEEK
|
1336 |
av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts); |
1337 |
#endif
|
1338 |
|
1339 |
if(ts_min == AV_NOPTS_VALUE){
|
1340 |
pos_min = s->data_offset; |
1341 |
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
1342 |
if (ts_min == AV_NOPTS_VALUE)
|
1343 |
return -1; |
1344 |
} |
1345 |
|
1346 |
if(ts_max == AV_NOPTS_VALUE){
|
1347 |
int step= 1024; |
1348 |
filesize = url_fsize(s->pb); |
1349 |
pos_max = filesize - 1;
|
1350 |
do{
|
1351 |
pos_max -= step; |
1352 |
ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step); |
1353 |
step += step; |
1354 |
}while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
|
1355 |
if (ts_max == AV_NOPTS_VALUE)
|
1356 |
return -1; |
1357 |
|
1358 |
for(;;){
|
1359 |
int64_t tmp_pos= pos_max + 1;
|
1360 |
int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX); |
1361 |
if(tmp_ts == AV_NOPTS_VALUE)
|
1362 |
break;
|
1363 |
ts_max= tmp_ts; |
1364 |
pos_max= tmp_pos; |
1365 |
if(tmp_pos >= filesize)
|
1366 |
break;
|
1367 |
} |
1368 |
pos_limit= pos_max; |
1369 |
} |
1370 |
|
1371 |
if(ts_min > ts_max){
|
1372 |
return -1; |
1373 |
}else if(ts_min == ts_max){ |
1374 |
pos_limit= pos_min; |
1375 |
} |
1376 |
|
1377 |
no_change=0;
|
1378 |
while (pos_min < pos_limit) {
|
1379 |
#ifdef DEBUG_SEEK
|
1380 |
av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n", |
1381 |
pos_min, pos_max, |
1382 |
ts_min, ts_max); |
1383 |
#endif
|
1384 |
assert(pos_limit <= pos_max); |
1385 |
|
1386 |
if(no_change==0){ |
1387 |
int64_t approximate_keyframe_distance= pos_max - pos_limit; |
1388 |
// interpolate position (better than dichotomy)
|
1389 |
pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min) |
1390 |
+ pos_min - approximate_keyframe_distance; |
1391 |
}else if(no_change==1){ |
1392 |
// bisection, if interpolation failed to change min or max pos last time
|
1393 |
pos = (pos_min + pos_limit)>>1;
|
1394 |
}else{
|
1395 |
/* linear search if bisection failed, can only happen if there
|
1396 |
are very few or no keyframes between min/max */
|
1397 |
pos=pos_min; |
1398 |
} |
1399 |
if(pos <= pos_min)
|
1400 |
pos= pos_min + 1;
|
1401 |
else if(pos > pos_limit) |
1402 |
pos= pos_limit; |
1403 |
start_pos= pos; |
1404 |
|
1405 |
ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
|
1406 |
if(pos == pos_max)
|
1407 |
no_change++; |
1408 |
else
|
1409 |
no_change=0;
|
1410 |
#ifdef DEBUG_SEEK
|
1411 |
av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit, start_pos, no_change); |
1412 |
#endif
|
1413 |
if(ts == AV_NOPTS_VALUE){
|
1414 |
av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
|
1415 |
return -1; |
1416 |
} |
1417 |
assert(ts != AV_NOPTS_VALUE); |
1418 |
if (target_ts <= ts) {
|
1419 |
pos_limit = start_pos - 1;
|
1420 |
pos_max = pos; |
1421 |
ts_max = ts; |
1422 |
} |
1423 |
if (target_ts >= ts) {
|
1424 |
pos_min = pos; |
1425 |
ts_min = ts; |
1426 |
} |
1427 |
} |
1428 |
|
1429 |
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
1430 |
ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; |
1431 |
#ifdef DEBUG_SEEK
|
1432 |
pos_min = pos; |
1433 |
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
1434 |
pos_min++; |
1435 |
ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
1436 |
av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n", |
1437 |
pos, ts_min, target_ts, ts_max); |
1438 |
#endif
|
1439 |
*ts_ret= ts; |
1440 |
return pos;
|
1441 |
} |
1442 |
|
1443 |
static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){ |
1444 |
int64_t pos_min, pos_max; |
1445 |
#if 0
|
1446 |
AVStream *st;
|
1447 |
|
1448 |
if (stream_index < 0)
|
1449 |
return -1;
|
1450 |
|
1451 |
st= s->streams[stream_index];
|
1452 |
#endif
|
1453 |
|
1454 |
pos_min = s->data_offset; |
1455 |
pos_max = url_fsize(s->pb) - 1;
|
1456 |
|
1457 |
if (pos < pos_min) pos= pos_min;
|
1458 |
else if(pos > pos_max) pos= pos_max; |
1459 |
|
1460 |
url_fseek(s->pb, pos, SEEK_SET); |
1461 |
|
1462 |
#if 0
|
1463 |
av_update_cur_dts(s, st, ts);
|
1464 |
#endif
|
1465 |
return 0; |
1466 |
} |
1467 |
|
1468 |
static int av_seek_frame_generic(AVFormatContext *s, |
1469 |
int stream_index, int64_t timestamp, int flags) |
1470 |
{ |
1471 |
int index, ret;
|
1472 |
AVStream *st; |
1473 |
AVIndexEntry *ie; |
1474 |
|
1475 |
st = s->streams[stream_index]; |
1476 |
|
1477 |
index = av_index_search_timestamp(st, timestamp, flags); |
1478 |
|
1479 |
if(index < 0 || index==st->nb_index_entries-1){ |
1480 |
int i;
|
1481 |
AVPacket pkt; |
1482 |
|
1483 |
if(st->nb_index_entries){
|
1484 |
assert(st->index_entries); |
1485 |
ie= &st->index_entries[st->nb_index_entries-1];
|
1486 |
if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0) |
1487 |
return ret;
|
1488 |
av_update_cur_dts(s, st, ie->timestamp); |
1489 |
}else{
|
1490 |
if ((ret = url_fseek(s->pb, 0, SEEK_SET)) < 0) |
1491 |
return ret;
|
1492 |
} |
1493 |
for(i=0;; i++) { |
1494 |
int ret;
|
1495 |
do{
|
1496 |
ret = av_read_frame(s, &pkt); |
1497 |
}while(ret == AVERROR(EAGAIN));
|
1498 |
if(ret<0) |
1499 |
break;
|
1500 |
av_free_packet(&pkt); |
1501 |
if(stream_index == pkt.stream_index){
|
1502 |
if((pkt.flags & PKT_FLAG_KEY) && pkt.dts > timestamp)
|
1503 |
break;
|
1504 |
} |
1505 |
} |
1506 |
index = av_index_search_timestamp(st, timestamp, flags); |
1507 |
} |
1508 |
if (index < 0) |
1509 |
return -1; |
1510 |
|
1511 |
av_read_frame_flush(s); |
1512 |
if (s->iformat->read_seek){
|
1513 |
if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) |
1514 |
return 0; |
1515 |
} |
1516 |
ie = &st->index_entries[index]; |
1517 |
if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0) |
1518 |
return ret;
|
1519 |
av_update_cur_dts(s, st, ie->timestamp); |
1520 |
|
1521 |
return 0; |
1522 |
} |
1523 |
|
1524 |
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
1525 |
{ |
1526 |
int ret;
|
1527 |
AVStream *st; |
1528 |
|
1529 |
av_read_frame_flush(s); |
1530 |
|
1531 |
if(flags & AVSEEK_FLAG_BYTE)
|
1532 |
return av_seek_frame_byte(s, stream_index, timestamp, flags);
|
1533 |
|
1534 |
if(stream_index < 0){ |
1535 |
stream_index= av_find_default_stream_index(s); |
1536 |
if(stream_index < 0) |
1537 |
return -1; |
1538 |
|
1539 |
st= s->streams[stream_index]; |
1540 |
/* timestamp for default must be expressed in AV_TIME_BASE units */
|
1541 |
timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num); |
1542 |
} |
1543 |
|
1544 |
/* first, we try the format specific seek */
|
1545 |
if (s->iformat->read_seek)
|
1546 |
ret = s->iformat->read_seek(s, stream_index, timestamp, flags); |
1547 |
else
|
1548 |
ret = -1;
|
1549 |
if (ret >= 0) { |
1550 |
return 0; |
1551 |
} |
1552 |
|
1553 |
if(s->iformat->read_timestamp)
|
1554 |
return av_seek_frame_binary(s, stream_index, timestamp, flags);
|
1555 |
else
|
1556 |
return av_seek_frame_generic(s, stream_index, timestamp, flags);
|
1557 |
} |
1558 |
|
1559 |
/*******************************************************/
|
1560 |
|
1561 |
/**
|
1562 |
* Returns TRUE if the stream has accurate duration in any stream.
|
1563 |
*
|
1564 |
* @return TRUE if the stream has accurate duration for at least one component.
|
1565 |
*/
|
1566 |
static int av_has_duration(AVFormatContext *ic) |
1567 |
{ |
1568 |
int i;
|
1569 |
AVStream *st; |
1570 |
|
1571 |
for(i = 0;i < ic->nb_streams; i++) { |
1572 |
st = ic->streams[i]; |
1573 |
if (st->duration != AV_NOPTS_VALUE)
|
1574 |
return 1; |
1575 |
} |
1576 |
return 0; |
1577 |
} |
1578 |
|
1579 |
/**
|
1580 |
* Estimate the stream timings from the one of each components.
|
1581 |
*
|
1582 |
* Also computes the global bitrate if possible.
|
1583 |
*/
|
1584 |
static void av_update_stream_timings(AVFormatContext *ic) |
1585 |
{ |
1586 |
int64_t start_time, start_time1, end_time, end_time1; |
1587 |
int64_t duration, duration1; |
1588 |
int i;
|
1589 |
AVStream *st; |
1590 |
|
1591 |
start_time = INT64_MAX; |
1592 |
end_time = INT64_MIN; |
1593 |
duration = INT64_MIN; |
1594 |
for(i = 0;i < ic->nb_streams; i++) { |
1595 |
st = ic->streams[i]; |
1596 |
if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
|
1597 |
start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q); |
1598 |
if (start_time1 < start_time)
|
1599 |
start_time = start_time1; |
1600 |
if (st->duration != AV_NOPTS_VALUE) {
|
1601 |
end_time1 = start_time1 |
1602 |
+ av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
1603 |
if (end_time1 > end_time)
|
1604 |
end_time = end_time1; |
1605 |
} |
1606 |
} |
1607 |
if (st->duration != AV_NOPTS_VALUE) {
|
1608 |
duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
1609 |
if (duration1 > duration)
|
1610 |
duration = duration1; |
1611 |
} |
1612 |
} |
1613 |
if (start_time != INT64_MAX) {
|
1614 |
ic->start_time = start_time; |
1615 |
if (end_time != INT64_MIN) {
|
1616 |
if (end_time - start_time > duration)
|
1617 |
duration = end_time - start_time; |
1618 |
} |
1619 |
} |
1620 |
if (duration != INT64_MIN) {
|
1621 |
ic->duration = duration; |
1622 |
if (ic->file_size > 0) { |
1623 |
/* compute the bitrate */
|
1624 |
ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE / |
1625 |
(double)ic->duration;
|
1626 |
} |
1627 |
} |
1628 |
} |
1629 |
|
1630 |
static void fill_all_stream_timings(AVFormatContext *ic) |
1631 |
{ |
1632 |
int i;
|
1633 |
AVStream *st; |
1634 |
|
1635 |
av_update_stream_timings(ic); |
1636 |
for(i = 0;i < ic->nb_streams; i++) { |
1637 |
st = ic->streams[i]; |
1638 |
if (st->start_time == AV_NOPTS_VALUE) {
|
1639 |
if(ic->start_time != AV_NOPTS_VALUE)
|
1640 |
st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base); |
1641 |
if(ic->duration != AV_NOPTS_VALUE)
|
1642 |
st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base); |
1643 |
} |
1644 |
} |
1645 |
} |
1646 |
|
1647 |
static void av_estimate_timings_from_bit_rate(AVFormatContext *ic) |
1648 |
{ |
1649 |
int64_t filesize, duration; |
1650 |
int bit_rate, i;
|
1651 |
AVStream *st; |
1652 |
|
1653 |
/* if bit_rate is already set, we believe it */
|
1654 |
if (ic->bit_rate == 0) { |
1655 |
bit_rate = 0;
|
1656 |
for(i=0;i<ic->nb_streams;i++) { |
1657 |
st = ic->streams[i]; |
1658 |
bit_rate += st->codec->bit_rate; |
1659 |
} |
1660 |
ic->bit_rate = bit_rate; |
1661 |
} |
1662 |
|
1663 |
/* if duration is already set, we believe it */
|
1664 |
if (ic->duration == AV_NOPTS_VALUE &&
|
1665 |
ic->bit_rate != 0 &&
|
1666 |
ic->file_size != 0) {
|
1667 |
filesize = ic->file_size; |
1668 |
if (filesize > 0) { |
1669 |
for(i = 0; i < ic->nb_streams; i++) { |
1670 |
st = ic->streams[i]; |
1671 |
duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
|
1672 |
if (st->duration == AV_NOPTS_VALUE)
|
1673 |
st->duration = duration; |
1674 |
} |
1675 |
} |
1676 |
} |
1677 |
} |
1678 |
|
1679 |
#define DURATION_MAX_READ_SIZE 250000 |
1680 |
|
1681 |
/* only usable for MPEG-PS streams */
|
1682 |
static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) |
1683 |
{ |
1684 |
AVPacket pkt1, *pkt = &pkt1; |
1685 |
AVStream *st; |
1686 |
int read_size, i, ret;
|
1687 |
int64_t end_time; |
1688 |
int64_t filesize, offset, duration; |
1689 |
|
1690 |
ic->cur_st = NULL;
|
1691 |
|
1692 |
/* flush packet queue */
|
1693 |
flush_packet_queue(ic); |
1694 |
|
1695 |
for(i=0;i<ic->nb_streams;i++) { |
1696 |
st = ic->streams[i]; |
1697 |
if (st->parser) {
|
1698 |
av_parser_close(st->parser); |
1699 |
st->parser= NULL;
|
1700 |
av_free_packet(&st->cur_pkt); |
1701 |
} |
1702 |
} |
1703 |
|
1704 |
/* we read the first packets to get the first PTS (not fully
|
1705 |
accurate, but it is enough now) */
|
1706 |
url_fseek(ic->pb, 0, SEEK_SET);
|
1707 |
read_size = 0;
|
1708 |
for(;;) {
|
1709 |
if (read_size >= DURATION_MAX_READ_SIZE)
|
1710 |
break;
|
1711 |
/* if all info is available, we can stop */
|
1712 |
for(i = 0;i < ic->nb_streams; i++) { |
1713 |
st = ic->streams[i]; |
1714 |
if (st->start_time == AV_NOPTS_VALUE)
|
1715 |
break;
|
1716 |
} |
1717 |
if (i == ic->nb_streams)
|
1718 |
break;
|
1719 |
|
1720 |
do{
|
1721 |
ret = av_read_packet(ic, pkt); |
1722 |
}while(ret == AVERROR(EAGAIN));
|
1723 |
if (ret != 0) |
1724 |
break;
|
1725 |
read_size += pkt->size; |
1726 |
st = ic->streams[pkt->stream_index]; |
1727 |
if (pkt->pts != AV_NOPTS_VALUE) {
|
1728 |
if (st->start_time == AV_NOPTS_VALUE)
|
1729 |
st->start_time = pkt->pts; |
1730 |
} |
1731 |
av_free_packet(pkt); |
1732 |
} |
1733 |
|
1734 |
/* estimate the end time (duration) */
|
1735 |
/* XXX: may need to support wrapping */
|
1736 |
filesize = ic->file_size; |
1737 |
offset = filesize - DURATION_MAX_READ_SIZE; |
1738 |
if (offset < 0) |
1739 |
offset = 0;
|
1740 |
|
1741 |
url_fseek(ic->pb, offset, SEEK_SET); |
1742 |
read_size = 0;
|
1743 |
for(;;) {
|
1744 |
if (read_size >= DURATION_MAX_READ_SIZE)
|
1745 |
break;
|
1746 |
|
1747 |
do{
|
1748 |
ret = av_read_packet(ic, pkt); |
1749 |
}while(ret == AVERROR(EAGAIN));
|
1750 |
if (ret != 0) |
1751 |
break;
|
1752 |
read_size += pkt->size; |
1753 |
st = ic->streams[pkt->stream_index]; |
1754 |
if (pkt->pts != AV_NOPTS_VALUE &&
|
1755 |
st->start_time != AV_NOPTS_VALUE) { |
1756 |
end_time = pkt->pts; |
1757 |
duration = end_time - st->start_time; |
1758 |
if (duration > 0) { |
1759 |
if (st->duration == AV_NOPTS_VALUE ||
|
1760 |
st->duration < duration) |
1761 |
st->duration = duration; |
1762 |
} |
1763 |
} |
1764 |
av_free_packet(pkt); |
1765 |
} |
1766 |
|
1767 |
fill_all_stream_timings(ic); |
1768 |
|
1769 |
url_fseek(ic->pb, old_offset, SEEK_SET); |
1770 |
for(i=0; i<ic->nb_streams; i++){ |
1771 |
st= ic->streams[i]; |
1772 |
st->cur_dts= st->first_dts; |
1773 |
st->last_IP_pts = AV_NOPTS_VALUE; |
1774 |
} |
1775 |
} |
1776 |
|
1777 |
static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset) |
1778 |
{ |
1779 |
int64_t file_size; |
1780 |
|
1781 |
/* get the file size, if possible */
|
1782 |
if (ic->iformat->flags & AVFMT_NOFILE) {
|
1783 |
file_size = 0;
|
1784 |
} else {
|
1785 |
file_size = url_fsize(ic->pb); |
1786 |
if (file_size < 0) |
1787 |
file_size = 0;
|
1788 |
} |
1789 |
ic->file_size = file_size; |
1790 |
|
1791 |
if ((!strcmp(ic->iformat->name, "mpeg") || |
1792 |
!strcmp(ic->iformat->name, "mpegts")) &&
|
1793 |
file_size && !url_is_streamed(ic->pb)) { |
1794 |
/* get accurate estimate from the PTSes */
|
1795 |
av_estimate_timings_from_pts(ic, old_offset); |
1796 |
} else if (av_has_duration(ic)) { |
1797 |
/* at least one component has timings - we use them for all
|
1798 |
the components */
|
1799 |
fill_all_stream_timings(ic); |
1800 |
} else {
|
1801 |
/* less precise: use bitrate info */
|
1802 |
av_estimate_timings_from_bit_rate(ic); |
1803 |
} |
1804 |
av_update_stream_timings(ic); |
1805 |
|
1806 |
#if 0
|
1807 |
{
|
1808 |
int i;
|
1809 |
AVStream *st;
|
1810 |
for(i = 0;i < ic->nb_streams; i++) {
|
1811 |
st = ic->streams[i];
|
1812 |
printf("%d: start_time: %0.3f duration: %0.3f\n",
|
1813 |
i, (double)st->start_time / AV_TIME_BASE,
|
1814 |
(double)st->duration / AV_TIME_BASE);
|
1815 |
}
|
1816 |
printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
|
1817 |
(double)ic->start_time / AV_TIME_BASE,
|
1818 |
(double)ic->duration / AV_TIME_BASE,
|
1819 |
ic->bit_rate / 1000);
|
1820 |
}
|
1821 |
#endif
|
1822 |
} |
1823 |
|
1824 |
static int has_codec_parameters(AVCodecContext *enc) |
1825 |
{ |
1826 |
int val;
|
1827 |
switch(enc->codec_type) {
|
1828 |
case CODEC_TYPE_AUDIO:
|
1829 |
val = enc->sample_rate && enc->channels && enc->sample_fmt != SAMPLE_FMT_NONE; |
1830 |
if(!enc->frame_size &&
|
1831 |
(enc->codec_id == CODEC_ID_VORBIS || |
1832 |
enc->codec_id == CODEC_ID_AAC)) |
1833 |
return 0; |
1834 |
break;
|
1835 |
case CODEC_TYPE_VIDEO:
|
1836 |
val = enc->width && enc->pix_fmt != PIX_FMT_NONE; |
1837 |
break;
|
1838 |
default:
|
1839 |
val = 1;
|
1840 |
break;
|
1841 |
} |
1842 |
return enc->codec_id != CODEC_ID_NONE && val != 0; |
1843 |
} |
1844 |
|
1845 |
static int try_decode_frame(AVStream *st, const uint8_t *data, int size) |
1846 |
{ |
1847 |
int16_t *samples; |
1848 |
AVCodec *codec; |
1849 |
int got_picture, data_size, ret=0; |
1850 |
AVFrame picture; |
1851 |
|
1852 |
if(!st->codec->codec){
|
1853 |
codec = avcodec_find_decoder(st->codec->codec_id); |
1854 |
if (!codec)
|
1855 |
return -1; |
1856 |
ret = avcodec_open(st->codec, codec); |
1857 |
if (ret < 0) |
1858 |
return ret;
|
1859 |
} |
1860 |
|
1861 |
if(!has_codec_parameters(st->codec)){
|
1862 |
switch(st->codec->codec_type) {
|
1863 |
case CODEC_TYPE_VIDEO:
|
1864 |
ret = avcodec_decode_video(st->codec, &picture, |
1865 |
&got_picture, data, size); |
1866 |
break;
|
1867 |
case CODEC_TYPE_AUDIO:
|
1868 |
data_size = FFMAX(size, AVCODEC_MAX_AUDIO_FRAME_SIZE); |
1869 |
samples = av_malloc(data_size); |
1870 |
if (!samples)
|
1871 |
goto fail;
|
1872 |
ret = avcodec_decode_audio2(st->codec, samples, |
1873 |
&data_size, data, size); |
1874 |
av_free(samples); |
1875 |
break;
|
1876 |
default:
|
1877 |
break;
|
1878 |
} |
1879 |
} |
1880 |
fail:
|
1881 |
return ret;
|
1882 |
} |
1883 |
|
1884 |
unsigned int codec_get_tag(const AVCodecTag *tags, int id) |
1885 |
{ |
1886 |
while (tags->id != CODEC_ID_NONE) {
|
1887 |
if (tags->id == id)
|
1888 |
return tags->tag;
|
1889 |
tags++; |
1890 |
} |
1891 |
return 0; |
1892 |
} |
1893 |
|
1894 |
enum CodecID codec_get_id(const AVCodecTag *tags, unsigned int tag) |
1895 |
{ |
1896 |
int i;
|
1897 |
for(i=0; tags[i].id != CODEC_ID_NONE;i++) { |
1898 |
if(tag == tags[i].tag)
|
1899 |
return tags[i].id;
|
1900 |
} |
1901 |
for(i=0; tags[i].id != CODEC_ID_NONE; i++) { |
1902 |
if( toupper((tag >> 0)&0xFF) == toupper((tags[i].tag >> 0)&0xFF) |
1903 |
&& toupper((tag >> 8)&0xFF) == toupper((tags[i].tag >> 8)&0xFF) |
1904 |
&& toupper((tag >>16)&0xFF) == toupper((tags[i].tag >>16)&0xFF) |
1905 |
&& toupper((tag >>24)&0xFF) == toupper((tags[i].tag >>24)&0xFF)) |
1906 |
return tags[i].id;
|
1907 |
} |
1908 |
return CODEC_ID_NONE;
|
1909 |
} |
1910 |
|
1911 |
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id) |
1912 |
{ |
1913 |
int i;
|
1914 |
for(i=0; tags && tags[i]; i++){ |
1915 |
int tag= codec_get_tag(tags[i], id);
|
1916 |
if(tag) return tag; |
1917 |
} |
1918 |
return 0; |
1919 |
} |
1920 |
|
1921 |
enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag) |
1922 |
{ |
1923 |
int i;
|
1924 |
for(i=0; tags && tags[i]; i++){ |
1925 |
enum CodecID id= codec_get_id(tags[i], tag);
|
1926 |
if(id!=CODEC_ID_NONE) return id; |
1927 |
} |
1928 |
return CODEC_ID_NONE;
|
1929 |
} |
1930 |
|
1931 |
static void compute_chapters_end(AVFormatContext *s) |
1932 |
{ |
1933 |
unsigned int i; |
1934 |
|
1935 |
for (i=0; i+1<s->nb_chapters; i++) |
1936 |
if (s->chapters[i]->end == AV_NOPTS_VALUE) {
|
1937 |
assert(s->chapters[i]->start <= s->chapters[i+1]->start);
|
1938 |
assert(!av_cmp_q(s->chapters[i]->time_base, s->chapters[i+1]->time_base));
|
1939 |
s->chapters[i]->end = s->chapters[i+1]->start;
|
1940 |
} |
1941 |
|
1942 |
if (s->nb_chapters && s->chapters[i]->end == AV_NOPTS_VALUE) {
|
1943 |
assert(s->start_time != AV_NOPTS_VALUE); |
1944 |
assert(s->duration > 0);
|
1945 |
s->chapters[i]->end = av_rescale_q(s->start_time + s->duration, |
1946 |
AV_TIME_BASE_Q, |
1947 |
s->chapters[i]->time_base); |
1948 |
} |
1949 |
} |
1950 |
|
1951 |
/* absolute maximum size we read until we abort */
|
1952 |
#define MAX_READ_SIZE 5000000 |
1953 |
|
1954 |
#define MAX_STD_TIMEBASES (60*12+5) |
1955 |
static int get_std_framerate(int i){ |
1956 |
if(i<60*12) return i*1001; |
1957 |
else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12; |
1958 |
} |
1959 |
|
1960 |
/*
|
1961 |
* Is the time base unreliable.
|
1962 |
* This is a heuristic to balance between quick acceptance of the values in
|
1963 |
* the headers vs. some extra checks.
|
1964 |
* Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
|
1965 |
* MPEG-2 commonly misuses field repeat flags to store different framerates.
|
1966 |
* And there are "variable" fps files this needs to detect as well.
|
1967 |
*/
|
1968 |
static int tb_unreliable(AVCodecContext *c){ |
1969 |
if( c->time_base.den >= 101L*c->time_base.num |
1970 |
|| c->time_base.den < 5L*c->time_base.num
|
1971 |
/* || c->codec_tag == AV_RL32("DIVX")
|
1972 |
|| c->codec_tag == AV_RL32("XVID")*/
|
1973 |
|| c->codec_id == CODEC_ID_MPEG2VIDEO) |
1974 |
return 1; |
1975 |
return 0; |
1976 |
} |
1977 |
|
1978 |
int av_find_stream_info(AVFormatContext *ic)
|
1979 |
{ |
1980 |
int i, count, ret, read_size, j;
|
1981 |
AVStream *st; |
1982 |
AVPacket pkt1, *pkt; |
1983 |
int64_t last_dts[MAX_STREAMS]; |
1984 |
int duration_count[MAX_STREAMS]={0}; |
1985 |
double (*duration_error)[MAX_STD_TIMEBASES];
|
1986 |
int64_t old_offset = url_ftell(ic->pb); |
1987 |
int64_t codec_info_duration[MAX_STREAMS]={0};
|
1988 |
int codec_info_nb_frames[MAX_STREAMS]={0}; |
1989 |
|
1990 |
duration_error = av_mallocz(MAX_STREAMS * sizeof(*duration_error));
|
1991 |
if (!duration_error) return AVERROR(ENOMEM); |
1992 |
|
1993 |
for(i=0;i<ic->nb_streams;i++) { |
1994 |
st = ic->streams[i]; |
1995 |
if(st->codec->codec_type == CODEC_TYPE_VIDEO){
|
1996 |
/* if(!st->time_base.num)
|
1997 |
st->time_base= */
|
1998 |
if(!st->codec->time_base.num)
|
1999 |
st->codec->time_base= st->time_base; |
2000 |
} |
2001 |
//only for the split stuff
|
2002 |
if (!st->parser) {
|
2003 |
st->parser = av_parser_init(st->codec->codec_id); |
2004 |
if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
|
2005 |
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
2006 |
} |
2007 |
} |
2008 |
} |
2009 |
|
2010 |
for(i=0;i<MAX_STREAMS;i++){ |
2011 |
last_dts[i]= AV_NOPTS_VALUE; |
2012 |
} |
2013 |
|
2014 |
count = 0;
|
2015 |
read_size = 0;
|
2016 |
for(;;) {
|
2017 |
/* check if one codec still needs to be handled */
|
2018 |
for(i=0;i<ic->nb_streams;i++) { |
2019 |
st = ic->streams[i]; |
2020 |
if (!has_codec_parameters(st->codec))
|
2021 |
break;
|
2022 |
/* variable fps and no guess at the real fps */
|
2023 |
if( tb_unreliable(st->codec)
|
2024 |
&& duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
|
2025 |
break;
|
2026 |
if(st->parser && st->parser->parser->split && !st->codec->extradata)
|
2027 |
break;
|
2028 |
if(st->first_dts == AV_NOPTS_VALUE)
|
2029 |
break;
|
2030 |
} |
2031 |
if (i == ic->nb_streams) {
|
2032 |
/* NOTE: if the format has no header, then we need to read
|
2033 |
some packets to get most of the streams, so we cannot
|
2034 |
stop here */
|
2035 |
if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
|
2036 |
/* if we found the info for all the codecs, we can stop */
|
2037 |
ret = count; |
2038 |
break;
|
2039 |
} |
2040 |
} |
2041 |
/* we did not get all the codec info, but we read too much data */
|
2042 |
if (read_size >= MAX_READ_SIZE) {
|
2043 |
ret = count; |
2044 |
break;
|
2045 |
} |
2046 |
|
2047 |
/* NOTE: a new stream can be added there if no header in file
|
2048 |
(AVFMTCTX_NOHEADER) */
|
2049 |
ret = av_read_frame_internal(ic, &pkt1); |
2050 |
if(ret == AVERROR(EAGAIN))
|
2051 |
continue;
|
2052 |
if (ret < 0) { |
2053 |
/* EOF or error */
|
2054 |
ret = -1; /* we could not have all the codec parameters before EOF */ |
2055 |
for(i=0;i<ic->nb_streams;i++) { |
2056 |
st = ic->streams[i]; |
2057 |
if (!has_codec_parameters(st->codec)){
|
2058 |
char buf[256]; |
2059 |
avcodec_string(buf, sizeof(buf), st->codec, 0); |
2060 |
av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf);
|
2061 |
} else {
|
2062 |
ret = 0;
|
2063 |
} |
2064 |
} |
2065 |
break;
|
2066 |
} |
2067 |
|
2068 |
pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end); |
2069 |
if(av_dup_packet(pkt) < 0) { |
2070 |
av_free(duration_error); |
2071 |
return AVERROR(ENOMEM);
|
2072 |
} |
2073 |
|
2074 |
read_size += pkt->size; |
2075 |
|
2076 |
st = ic->streams[pkt->stream_index]; |
2077 |
if(codec_info_nb_frames[st->index]>1) |
2078 |
codec_info_duration[st->index] += pkt->duration; |
2079 |
if (pkt->duration != 0) |
2080 |
codec_info_nb_frames[st->index]++; |
2081 |
|
2082 |
{ |
2083 |
int index= pkt->stream_index;
|
2084 |
int64_t last= last_dts[index]; |
2085 |
int64_t duration= pkt->dts - last; |
2086 |
|
2087 |
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){ |
2088 |
double dur= duration * av_q2d(st->time_base);
|
2089 |
|
2090 |
// if(st->codec->codec_type == CODEC_TYPE_VIDEO)
|
2091 |
// av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
|
2092 |
if(duration_count[index] < 2) |
2093 |
memset(duration_error[index], 0, sizeof(*duration_error)); |
2094 |
for(i=1; i<MAX_STD_TIMEBASES; i++){ |
2095 |
int framerate= get_std_framerate(i);
|
2096 |
int ticks= lrintf(dur*framerate/(1001*12)); |
2097 |
double error= dur - ticks*1001*12/(double)framerate; |
2098 |
duration_error[index][i] += error*error; |
2099 |
} |
2100 |
duration_count[index]++; |
2101 |
} |
2102 |
if(last == AV_NOPTS_VALUE || duration_count[index]<=1) |
2103 |
last_dts[pkt->stream_index]= pkt->dts; |
2104 |
} |
2105 |
if(st->parser && st->parser->parser->split && !st->codec->extradata){
|
2106 |
int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
|
2107 |
if(i){
|
2108 |
st->codec->extradata_size= i; |
2109 |
st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
2110 |
memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size); |
2111 |
memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
2112 |
} |
2113 |
} |
2114 |
|
2115 |
/* if still no information, we try to open the codec and to
|
2116 |
decompress the frame. We try to avoid that in most cases as
|
2117 |
it takes longer and uses more memory. For MPEG-4, we need to
|
2118 |
decompress for QuickTime. */
|
2119 |
if (!has_codec_parameters(st->codec) /*&& |
2120 |
(st->codec->codec_id == CODEC_ID_FLV1 ||
|
2121 |
st->codec->codec_id == CODEC_ID_H264 ||
|
2122 |
st->codec->codec_id == CODEC_ID_H263 ||
|
2123 |
st->codec->codec_id == CODEC_ID_H261 ||
|
2124 |
st->codec->codec_id == CODEC_ID_VORBIS ||
|
2125 |
st->codec->codec_id == CODEC_ID_MJPEG ||
|
2126 |
st->codec->codec_id == CODEC_ID_PNG ||
|
2127 |
st->codec->codec_id == CODEC_ID_PAM ||
|
2128 |
st->codec->codec_id == CODEC_ID_PGM ||
|
2129 |
st->codec->codec_id == CODEC_ID_PGMYUV ||
|
2130 |
st->codec->codec_id == CODEC_ID_PBM ||
|
2131 |
st->codec->codec_id == CODEC_ID_PPM ||
|
2132 |
st->codec->codec_id == CODEC_ID_SHORTEN ||
|
2133 |
(st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
|
2134 |
try_decode_frame(st, pkt->data, pkt->size); |
2135 |
|
2136 |
if (st->time_base.den > 0 && av_rescale_q(codec_info_duration[st->index], st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) { |
2137 |
break;
|
2138 |
} |
2139 |
count++; |
2140 |
} |
2141 |
|
2142 |
// close codecs which were opened in try_decode_frame()
|
2143 |
for(i=0;i<ic->nb_streams;i++) { |
2144 |
st = ic->streams[i]; |
2145 |
if(st->codec->codec)
|
2146 |
avcodec_close(st->codec); |
2147 |
} |
2148 |
for(i=0;i<ic->nb_streams;i++) { |
2149 |
st = ic->streams[i]; |
2150 |
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
2151 |
if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
|
2152 |
st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); |
2153 |
|
2154 |
if(duration_count[i]
|
2155 |
&& tb_unreliable(st->codec) /*&&
|
2156 |
//FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
|
2157 |
st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){
|
2158 |
double best_error= 2*av_q2d(st->time_base); |
2159 |
best_error= best_error*best_error*duration_count[i]*1000*12*30; |
2160 |
|
2161 |
for(j=1; j<MAX_STD_TIMEBASES; j++){ |
2162 |
double error= duration_error[i][j] * get_std_framerate(j);
|
2163 |
// if(st->codec->codec_type == CODEC_TYPE_VIDEO)
|
2164 |
// av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
|
2165 |
if(error < best_error){
|
2166 |
best_error= error; |
2167 |
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, get_std_framerate(j), 12*1001, INT_MAX); |
2168 |
} |
2169 |
} |
2170 |
} |
2171 |
|
2172 |
if (!st->r_frame_rate.num){
|
2173 |
if( st->codec->time_base.den * (int64_t)st->time_base.num
|
2174 |
<= st->codec->time_base.num * (int64_t)st->time_base.den){ |
2175 |
st->r_frame_rate.num = st->codec->time_base.den; |
2176 |
st->r_frame_rate.den = st->codec->time_base.num; |
2177 |
}else{
|
2178 |
st->r_frame_rate.num = st->time_base.den; |
2179 |
st->r_frame_rate.den = st->time_base.num; |
2180 |
} |
2181 |
} |
2182 |
}else if(st->codec->codec_type == CODEC_TYPE_AUDIO) { |
2183 |
if(!st->codec->bits_per_coded_sample)
|
2184 |
st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id); |
2185 |
} |
2186 |
} |
2187 |
|
2188 |
av_estimate_timings(ic, old_offset); |
2189 |
|
2190 |
compute_chapters_end(ic); |
2191 |
|
2192 |
#if 0
|
2193 |
/* correct DTS for B-frame streams with no timestamps */
|
2194 |
for(i=0;i<ic->nb_streams;i++) {
|
2195 |
st = ic->streams[i];
|
2196 |
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
2197 |
if(b-frames){
|
2198 |
ppktl = &ic->packet_buffer;
|
2199 |
while(ppkt1){
|
2200 |
if(ppkt1->stream_index != i)
|
2201 |
continue;
|
2202 |
if(ppkt1->pkt->dts < 0)
|
2203 |
break;
|
2204 |
if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
|
2205 |
break;
|
2206 |
ppkt1->pkt->dts -= delta;
|
2207 |
ppkt1= ppkt1->next;
|
2208 |
}
|
2209 |
if(ppkt1)
|
2210 |
continue;
|
2211 |
st->cur_dts -= delta;
|
2212 |
}
|
2213 |
}
|
2214 |
}
|
2215 |
#endif
|
2216 |
|
2217 |
av_free(duration_error); |
2218 |
|
2219 |
return ret;
|
2220 |
} |
2221 |
|
2222 |
/*******************************************************/
|
2223 |
|
2224 |
int av_read_play(AVFormatContext *s)
|
2225 |
{ |
2226 |
if (s->iformat->read_play)
|
2227 |
return s->iformat->read_play(s);
|
2228 |
if (s->pb)
|
2229 |
return av_url_read_fpause(s->pb, 0); |
2230 |
return AVERROR(ENOSYS);
|
2231 |
} |
2232 |
|
2233 |
int av_read_pause(AVFormatContext *s)
|
2234 |
{ |
2235 |
if (s->iformat->read_pause)
|
2236 |
return s->iformat->read_pause(s);
|
2237 |
if (s->pb)
|
2238 |
return av_url_read_fpause(s->pb, 1); |
2239 |
return AVERROR(ENOSYS);
|
2240 |
} |
2241 |
|
2242 |
void av_close_input_stream(AVFormatContext *s)
|
2243 |
{ |
2244 |
int i;
|
2245 |
AVStream *st; |
2246 |
|
2247 |
if (s->iformat->read_close)
|
2248 |
s->iformat->read_close(s); |
2249 |
for(i=0;i<s->nb_streams;i++) { |
2250 |
/* free all data in a stream component */
|
2251 |
st = s->streams[i]; |
2252 |
if (st->parser) {
|
2253 |
av_parser_close(st->parser); |
2254 |
av_free_packet(&st->cur_pkt); |
2255 |
} |
2256 |
av_metadata_free(&st->metadata); |
2257 |
av_free(st->index_entries); |
2258 |
av_free(st->codec->extradata); |
2259 |
av_free(st->codec); |
2260 |
av_free(st->filename); |
2261 |
av_free(st->priv_data); |
2262 |
av_free(st); |
2263 |
} |
2264 |
for(i=s->nb_programs-1; i>=0; i--) { |
2265 |
av_freep(&s->programs[i]->provider_name); |
2266 |
av_freep(&s->programs[i]->name); |
2267 |
av_metadata_free(&s->programs[i]->metadata); |
2268 |
av_freep(&s->programs[i]->stream_index); |
2269 |
av_freep(&s->programs[i]); |
2270 |
} |
2271 |
av_freep(&s->programs); |
2272 |
flush_packet_queue(s); |
2273 |
av_freep(&s->priv_data); |
2274 |
while(s->nb_chapters--) {
|
2275 |
av_free(s->chapters[s->nb_chapters]->title); |
2276 |
av_metadata_free(&s->chapters[s->nb_chapters]->metadata); |
2277 |
av_free(s->chapters[s->nb_chapters]); |
2278 |
} |
2279 |
av_freep(&s->chapters); |
2280 |
av_metadata_free(&s->metadata); |
2281 |
av_free(s); |
2282 |
} |
2283 |
|
2284 |
void av_close_input_file(AVFormatContext *s)
|
2285 |
{ |
2286 |
ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
|
2287 |
av_close_input_stream(s); |
2288 |
if (pb)
|
2289 |
url_fclose(pb); |
2290 |
} |
2291 |
|
2292 |
AVStream *av_new_stream(AVFormatContext *s, int id)
|
2293 |
{ |
2294 |
AVStream *st; |
2295 |
int i;
|
2296 |
|
2297 |
if (s->nb_streams >= MAX_STREAMS)
|
2298 |
return NULL; |
2299 |
|
2300 |
st = av_mallocz(sizeof(AVStream));
|
2301 |
if (!st)
|
2302 |
return NULL; |
2303 |
|
2304 |
st->codec= avcodec_alloc_context(); |
2305 |
if (s->iformat) {
|
2306 |
/* no default bitrate if decoding */
|
2307 |
st->codec->bit_rate = 0;
|
2308 |
} |
2309 |
st->index = s->nb_streams; |
2310 |
st->id = id; |
2311 |
st->start_time = AV_NOPTS_VALUE; |
2312 |
st->duration = AV_NOPTS_VALUE; |
2313 |
/* we set the current DTS to 0 so that formats without any timestamps
|
2314 |
but durations get some timestamps, formats with some unknown
|
2315 |
timestamps have their first few packets buffered and the
|
2316 |
timestamps corrected before they are returned to the user */
|
2317 |
st->cur_dts = 0;
|
2318 |
st->first_dts = AV_NOPTS_VALUE; |
2319 |
|
2320 |
/* default pts setting is MPEG-like */
|
2321 |
av_set_pts_info(st, 33, 1, 90000); |
2322 |
st->last_IP_pts = AV_NOPTS_VALUE; |
2323 |
for(i=0; i<MAX_REORDER_DELAY+1; i++) |
2324 |
st->pts_buffer[i]= AV_NOPTS_VALUE; |
2325 |
|
2326 |
st->sample_aspect_ratio = (AVRational){0,1}; |
2327 |
|
2328 |
s->streams[s->nb_streams++] = st; |
2329 |
return st;
|
2330 |
} |
2331 |
|
2332 |
AVProgram *av_new_program(AVFormatContext *ac, int id)
|
2333 |
{ |
2334 |
AVProgram *program=NULL;
|
2335 |
int i;
|
2336 |
|
2337 |
#ifdef DEBUG_SI
|
2338 |
av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
|
2339 |
#endif
|
2340 |
|
2341 |
for(i=0; i<ac->nb_programs; i++) |
2342 |
if(ac->programs[i]->id == id)
|
2343 |
program = ac->programs[i]; |
2344 |
|
2345 |
if(!program){
|
2346 |
program = av_mallocz(sizeof(AVProgram));
|
2347 |
if (!program)
|
2348 |
return NULL; |
2349 |
dynarray_add(&ac->programs, &ac->nb_programs, program); |
2350 |
program->discard = AVDISCARD_NONE; |
2351 |
} |
2352 |
program->id = id; |
2353 |
|
2354 |
return program;
|
2355 |
} |
2356 |
|
2357 |
void av_set_program_name(AVProgram *program, char *provider_name, char *name) |
2358 |
{ |
2359 |
assert(!provider_name == !name); |
2360 |
if(name){
|
2361 |
av_free(program->provider_name); |
2362 |
av_free(program-> name); |
2363 |
program->provider_name = av_strdup(provider_name); |
2364 |
program-> name = av_strdup( name); |
2365 |
} |
2366 |
} |
2367 |
|
2368 |
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title) |
2369 |
{ |
2370 |
AVChapter *chapter = NULL;
|
2371 |
int i;
|
2372 |
|
2373 |
for(i=0; i<s->nb_chapters; i++) |
2374 |
if(s->chapters[i]->id == id)
|
2375 |
chapter = s->chapters[i]; |
2376 |
|
2377 |
if(!chapter){
|
2378 |
chapter= av_mallocz(sizeof(AVChapter));
|
2379 |
if(!chapter)
|
2380 |
return NULL; |
2381 |
dynarray_add(&s->chapters, &s->nb_chapters, chapter); |
2382 |
} |
2383 |
av_free(chapter->title); |
2384 |
chapter->title = av_strdup(title); |
2385 |
chapter->id = id; |
2386 |
chapter->time_base= time_base; |
2387 |
chapter->start = start; |
2388 |
chapter->end = end; |
2389 |
|
2390 |
return chapter;
|
2391 |
} |
2392 |
|
2393 |
/************************************************************/
|
2394 |
/* output media file */
|
2395 |
|
2396 |
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
|
2397 |
{ |
2398 |
int ret;
|
2399 |
|
2400 |
if (s->oformat->priv_data_size > 0) { |
2401 |
s->priv_data = av_mallocz(s->oformat->priv_data_size); |
2402 |
if (!s->priv_data)
|
2403 |
return AVERROR(ENOMEM);
|
2404 |
} else
|
2405 |
s->priv_data = NULL;
|
2406 |
|
2407 |
if (s->oformat->set_parameters) {
|
2408 |
ret = s->oformat->set_parameters(s, ap); |
2409 |
if (ret < 0) |
2410 |
return ret;
|
2411 |
} |
2412 |
return 0; |
2413 |
} |
2414 |
|
2415 |
int av_write_header(AVFormatContext *s)
|
2416 |
{ |
2417 |
int ret, i;
|
2418 |
AVStream *st; |
2419 |
|
2420 |
// some sanity checks
|
2421 |
for(i=0;i<s->nb_streams;i++) { |
2422 |
st = s->streams[i]; |
2423 |
|
2424 |
switch (st->codec->codec_type) {
|
2425 |
case CODEC_TYPE_AUDIO:
|
2426 |
if(st->codec->sample_rate<=0){ |
2427 |
av_log(s, AV_LOG_ERROR, "sample rate not set\n");
|
2428 |
return -1; |
2429 |
} |
2430 |
if(!st->codec->block_align)
|
2431 |
st->codec->block_align = st->codec->channels * |
2432 |
av_get_bits_per_sample(st->codec->codec_id) >> 3;
|
2433 |
break;
|
2434 |
case CODEC_TYPE_VIDEO:
|
2435 |
if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too? |
2436 |
av_log(s, AV_LOG_ERROR, "time base not set\n");
|
2437 |
return -1; |
2438 |
} |
2439 |
if(st->codec->width<=0 || st->codec->height<=0){ |
2440 |
av_log(s, AV_LOG_ERROR, "dimensions not set\n");
|
2441 |
return -1; |
2442 |
} |
2443 |
if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
|
2444 |
av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
|
2445 |
return -1; |
2446 |
} |
2447 |
break;
|
2448 |
} |
2449 |
|
2450 |
if(s->oformat->codec_tag){
|
2451 |
if(st->codec->codec_tag){
|
2452 |
//FIXME
|
2453 |
//check that tag + id is in the table
|
2454 |
//if neither is in the table -> OK
|
2455 |
//if tag is in the table with another id -> FAIL
|
2456 |
//if id is in the table with another tag -> FAIL unless strict < ?
|
2457 |
}else
|
2458 |
st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id); |
2459 |
} |
2460 |
} |
2461 |
|
2462 |
if (!s->priv_data && s->oformat->priv_data_size > 0) { |
2463 |
s->priv_data = av_mallocz(s->oformat->priv_data_size); |
2464 |
if (!s->priv_data)
|
2465 |
return AVERROR(ENOMEM);
|
2466 |
} |
2467 |
|
2468 |
#if LIBAVFORMAT_VERSION_MAJOR < 53 |
2469 |
ff_metadata_mux_compat(s); |
2470 |
#endif
|
2471 |
|
2472 |
if(s->oformat->write_header){
|
2473 |
ret = s->oformat->write_header(s); |
2474 |
if (ret < 0) |
2475 |
return ret;
|
2476 |
} |
2477 |
|
2478 |
/* init PTS generation */
|
2479 |
for(i=0;i<s->nb_streams;i++) { |
2480 |
int64_t den = AV_NOPTS_VALUE; |
2481 |
st = s->streams[i]; |
2482 |
|
2483 |
switch (st->codec->codec_type) {
|
2484 |
case CODEC_TYPE_AUDIO:
|
2485 |
den = (int64_t)st->time_base.num * st->codec->sample_rate; |
2486 |
break;
|
2487 |
case CODEC_TYPE_VIDEO:
|
2488 |
den = (int64_t)st->time_base.num * st->codec->time_base.den; |
2489 |
break;
|
2490 |
default:
|
2491 |
break;
|
2492 |
} |
2493 |
if (den != AV_NOPTS_VALUE) {
|
2494 |
if (den <= 0) |
2495 |
return AVERROR_INVALIDDATA;
|
2496 |
av_frac_init(&st->pts, 0, 0, den); |
2497 |
} |
2498 |
} |
2499 |
return 0; |
2500 |
} |
2501 |
|
2502 |
//FIXME merge with compute_pkt_fields
|
2503 |
static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){ |
2504 |
int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
|
2505 |
int num, den, frame_size, i;
|
2506 |
|
2507 |
// av_log(st->codec, 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);
|
2508 |
|
2509 |
/* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
|
2510 |
return -1;*/
|
2511 |
|
2512 |
/* duration field */
|
2513 |
if (pkt->duration == 0) { |
2514 |
compute_frame_duration(&num, &den, st, NULL, pkt);
|
2515 |
if (den && num) {
|
2516 |
pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
|
2517 |
} |
2518 |
} |
2519 |
|
2520 |
if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0) |
2521 |
pkt->pts= pkt->dts; |
2522 |
|
2523 |
//XXX/FIXME this is a temporary hack until all encoders output pts
|
2524 |
if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){ |
2525 |
pkt->dts= |
2526 |
// pkt->pts= st->cur_dts;
|
2527 |
pkt->pts= st->pts.val; |
2528 |
} |
2529 |
|
2530 |
//calculate dts from pts
|
2531 |
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
|
2532 |
st->pts_buffer[0]= pkt->pts;
|
2533 |
for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++) |
2534 |
st->pts_buffer[i]= (i-delay-1) * pkt->duration;
|
2535 |
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
2536 |
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
|
2537 |
|
2538 |
pkt->dts= st->pts_buffer[0];
|
2539 |
} |
2540 |
|
2541 |
if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
|
2542 |
av_log(st->codec, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts); |
2543 |
return -1; |
2544 |
} |
2545 |
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
|
2546 |
av_log(st->codec, AV_LOG_ERROR, "error, pts < dts\n");
|
2547 |
return -1; |
2548 |
} |
2549 |
|
2550 |
// av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
|
2551 |
st->cur_dts= pkt->dts; |
2552 |
st->pts.val= pkt->dts; |
2553 |
|
2554 |
/* update pts */
|
2555 |
switch (st->codec->codec_type) {
|
2556 |
case CODEC_TYPE_AUDIO:
|
2557 |
frame_size = get_audio_frame_size(st->codec, pkt->size); |
2558 |
|
2559 |
/* HACK/FIXME, we skip the initial 0 size packets as they are most
|
2560 |
likely equal to the encoder delay, but it would be better if we
|
2561 |
had the real timestamps from the encoder */
|
2562 |
if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) { |
2563 |
av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); |
2564 |
} |
2565 |
break;
|
2566 |
case CODEC_TYPE_VIDEO:
|
2567 |
av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num); |
2568 |
break;
|
2569 |
default:
|
2570 |
break;
|
2571 |
} |
2572 |
return 0; |
2573 |
} |
2574 |
|
2575 |
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
|
2576 |
{ |
2577 |
int ret = compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
|
2578 |
|
2579 |
if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
2580 |
return ret;
|
2581 |
|
2582 |
ret= s->oformat->write_packet(s, pkt); |
2583 |
if(!ret)
|
2584 |
ret= url_ferror(s->pb); |
2585 |
return ret;
|
2586 |
} |
2587 |
|
2588 |
void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
|
2589 |
int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
|
2590 |
{ |
2591 |
AVPacketList **next_point, *this_pktl; |
2592 |
|
2593 |
this_pktl = av_mallocz(sizeof(AVPacketList));
|
2594 |
this_pktl->pkt= *pkt; |
2595 |
if(pkt->destruct == av_destruct_packet)
|
2596 |
pkt->destruct= NULL; // not shared -> must keep original from being freed |
2597 |
else
|
2598 |
av_dup_packet(&this_pktl->pkt); //shared -> must dup
|
2599 |
|
2600 |
next_point = &s->packet_buffer; |
2601 |
while(*next_point){
|
2602 |
if(compare(s, &(*next_point)->pkt, pkt))
|
2603 |
break;
|
2604 |
next_point= &(*next_point)->next; |
2605 |
} |
2606 |
this_pktl->next= *next_point; |
2607 |
*next_point= this_pktl; |
2608 |
} |
2609 |
|
2610 |
int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
|
2611 |
{ |
2612 |
AVStream *st = s->streams[ pkt ->stream_index]; |
2613 |
AVStream *st2= s->streams[ next->stream_index]; |
2614 |
int64_t left = st2->time_base.num * (int64_t)st ->time_base.den; |
2615 |
int64_t right= st ->time_base.num * (int64_t)st2->time_base.den; |
2616 |
|
2617 |
if (pkt->dts == AV_NOPTS_VALUE)
|
2618 |
return 0; |
2619 |
|
2620 |
return next->dts * left > pkt->dts * right; //FIXME this can overflow |
2621 |
} |
2622 |
|
2623 |
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){ |
2624 |
AVPacketList *pktl; |
2625 |
int stream_count=0; |
2626 |
int streams[MAX_STREAMS];
|
2627 |
|
2628 |
if(pkt){
|
2629 |
ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts); |
2630 |
} |
2631 |
|
2632 |
memset(streams, 0, sizeof(streams)); |
2633 |
pktl= s->packet_buffer; |
2634 |
while(pktl){
|
2635 |
//av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
|
2636 |
if(streams[ pktl->pkt.stream_index ] == 0) |
2637 |
stream_count++; |
2638 |
streams[ pktl->pkt.stream_index ]++; |
2639 |
pktl= pktl->next; |
2640 |
} |
2641 |
|
2642 |
if(stream_count && (s->nb_streams == stream_count || flush)){
|
2643 |
pktl= s->packet_buffer; |
2644 |
*out= pktl->pkt; |
2645 |
|
2646 |
s->packet_buffer= pktl->next; |
2647 |
av_freep(&pktl); |
2648 |
return 1; |
2649 |
}else{
|
2650 |
av_init_packet(out); |
2651 |
return 0; |
2652 |
} |
2653 |
} |
2654 |
|
2655 |
/**
|
2656 |
* Interleaves an AVPacket correctly so it can be muxed.
|
2657 |
* @param out the interleaved packet will be output here
|
2658 |
* @param in the input packet
|
2659 |
* @param flush 1 if no further packets are available as input and all
|
2660 |
* remaining packets should be output
|
2661 |
* @return 1 if a packet was output, 0 if no packet could be output,
|
2662 |
* < 0 if an error occurred
|
2663 |
*/
|
2664 |
static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){ |
2665 |
if(s->oformat->interleave_packet)
|
2666 |
return s->oformat->interleave_packet(s, out, in, flush);
|
2667 |
else
|
2668 |
return av_interleave_packet_per_dts(s, out, in, flush);
|
2669 |
} |
2670 |
|
2671 |
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
|
2672 |
AVStream *st= s->streams[ pkt->stream_index]; |
2673 |
|
2674 |
//FIXME/XXX/HACK drop zero sized packets
|
2675 |
if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0) |
2676 |
return 0; |
2677 |
|
2678 |
//av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
|
2679 |
if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
2680 |
return -1; |
2681 |
|
2682 |
if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
2683 |
return -1; |
2684 |
|
2685 |
for(;;){
|
2686 |
AVPacket opkt; |
2687 |
int ret= av_interleave_packet(s, &opkt, pkt, 0); |
2688 |
if(ret<=0) //FIXME cleanup needed for ret<0 ? |
2689 |
return ret;
|
2690 |
|
2691 |
ret= s->oformat->write_packet(s, &opkt); |
2692 |
|
2693 |
av_free_packet(&opkt); |
2694 |
pkt= NULL;
|
2695 |
|
2696 |
if(ret<0) |
2697 |
return ret;
|
2698 |
if(url_ferror(s->pb))
|
2699 |
return url_ferror(s->pb);
|
2700 |
} |
2701 |
} |
2702 |
|
2703 |
int av_write_trailer(AVFormatContext *s)
|
2704 |
{ |
2705 |
int ret, i;
|
2706 |
|
2707 |
for(;;){
|
2708 |
AVPacket pkt; |
2709 |
ret= av_interleave_packet(s, &pkt, NULL, 1); |
2710 |
if(ret<0) //FIXME cleanup needed for ret<0 ? |
2711 |
goto fail;
|
2712 |
if(!ret)
|
2713 |
break;
|
2714 |
|
2715 |
ret= s->oformat->write_packet(s, &pkt); |
2716 |
|
2717 |
av_free_packet(&pkt); |
2718 |
|
2719 |
if(ret<0) |
2720 |
goto fail;
|
2721 |
if(url_ferror(s->pb))
|
2722 |
goto fail;
|
2723 |
} |
2724 |
|
2725 |
if(s->oformat->write_trailer)
|
2726 |
ret = s->oformat->write_trailer(s); |
2727 |
fail:
|
2728 |
if(ret == 0) |
2729 |
ret=url_ferror(s->pb); |
2730 |
for(i=0;i<s->nb_streams;i++) |
2731 |
av_freep(&s->streams[i]->priv_data); |
2732 |
av_freep(&s->priv_data); |
2733 |
return ret;
|
2734 |
} |
2735 |
|
2736 |
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx) |
2737 |
{ |
2738 |
int i, j;
|
2739 |
AVProgram *program=NULL;
|
2740 |
void *tmp;
|
2741 |
|
2742 |
for(i=0; i<ac->nb_programs; i++){ |
2743 |
if(ac->programs[i]->id != progid)
|
2744 |
continue;
|
2745 |
program = ac->programs[i]; |
2746 |
for(j=0; j<program->nb_stream_indexes; j++) |
2747 |
if(program->stream_index[j] == idx)
|
2748 |
return;
|
2749 |
|
2750 |
tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1)); |
2751 |
if(!tmp)
|
2752 |
return;
|
2753 |
program->stream_index = tmp; |
2754 |
program->stream_index[program->nb_stream_indexes++] = idx; |
2755 |
return;
|
2756 |
} |
2757 |
} |
2758 |
|
2759 |
/* "user interface" functions */
|
2760 |
static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output) |
2761 |
{ |
2762 |
char buf[256]; |
2763 |
int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
|
2764 |
AVStream *st = ic->streams[i]; |
2765 |
int g = av_gcd(st->time_base.num, st->time_base.den);
|
2766 |
avcodec_string(buf, sizeof(buf), st->codec, is_output);
|
2767 |
av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i); |
2768 |
/* the pid is an important information, so we display it */
|
2769 |
/* XXX: add a generic system */
|
2770 |
if (flags & AVFMT_SHOW_IDS)
|
2771 |
av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id); |
2772 |
if (strlen(st->language) > 0) |
2773 |
av_log(NULL, AV_LOG_INFO, "(%s)", st->language); |
2774 |
av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g); |
2775 |
av_log(NULL, AV_LOG_INFO, ": %s", buf); |
2776 |
if (st->sample_aspect_ratio.num && // default |
2777 |
av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) { |
2778 |
AVRational display_aspect_ratio; |
2779 |
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, |
2780 |
st->codec->width*st->sample_aspect_ratio.num, |
2781 |
st->codec->height*st->sample_aspect_ratio.den, |
2782 |
1024*1024); |
2783 |
av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d", |
2784 |
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
2785 |
display_aspect_ratio.num, display_aspect_ratio.den); |
2786 |
} |
2787 |
if(st->codec->codec_type == CODEC_TYPE_VIDEO){
|
2788 |
if(st->r_frame_rate.den && st->r_frame_rate.num)
|
2789 |
av_log(NULL, AV_LOG_INFO, ", %5.2f tb(r)", av_q2d(st->r_frame_rate)); |
2790 |
/* else if(st->time_base.den && st->time_base.num)
|
2791 |
av_log(NULL, AV_LOG_INFO, ", %5.2f tb(m)", 1/av_q2d(st->time_base));*/
|
2792 |
else
|
2793 |
av_log(NULL, AV_LOG_INFO, ", %5.2f tb(c)", 1/av_q2d(st->codec->time_base)); |
2794 |
} |
2795 |
av_log(NULL, AV_LOG_INFO, "\n"); |
2796 |
} |
2797 |
|
2798 |
void dump_format(AVFormatContext *ic,
|
2799 |
int index,
|
2800 |
const char *url, |
2801 |
int is_output)
|
2802 |
{ |
2803 |
int i;
|
2804 |
|
2805 |
av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n", |
2806 |
is_output ? "Output" : "Input", |
2807 |
index, |
2808 |
is_output ? ic->oformat->name : ic->iformat->name, |
2809 |
is_output ? "to" : "from", url); |
2810 |
if (!is_output) {
|
2811 |
av_log(NULL, AV_LOG_INFO, " Duration: "); |
2812 |
if (ic->duration != AV_NOPTS_VALUE) {
|
2813 |
int hours, mins, secs, us;
|
2814 |
secs = ic->duration / AV_TIME_BASE; |
2815 |
us = ic->duration % AV_TIME_BASE; |
2816 |
mins = secs / 60;
|
2817 |
secs %= 60;
|
2818 |
hours = mins / 60;
|
2819 |
mins %= 60;
|
2820 |
av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs, |
2821 |
(100 * us) / AV_TIME_BASE);
|
2822 |
} else {
|
2823 |
av_log(NULL, AV_LOG_INFO, "N/A"); |
2824 |
} |
2825 |
if (ic->start_time != AV_NOPTS_VALUE) {
|
2826 |
int secs, us;
|
2827 |
av_log(NULL, AV_LOG_INFO, ", start: "); |
2828 |
secs = ic->start_time / AV_TIME_BASE; |
2829 |
us = ic->start_time % AV_TIME_BASE; |
2830 |
av_log(NULL, AV_LOG_INFO, "%d.%06d", |
2831 |
secs, (int)av_rescale(us, 1000000, AV_TIME_BASE)); |
2832 |
} |
2833 |
av_log(NULL, AV_LOG_INFO, ", bitrate: "); |
2834 |
if (ic->bit_rate) {
|
2835 |
av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000); |
2836 |
} else {
|
2837 |
av_log(NULL, AV_LOG_INFO, "N/A"); |
2838 |
} |
2839 |
av_log(NULL, AV_LOG_INFO, "\n"); |
2840 |
} |
2841 |
if(ic->nb_programs) {
|
2842 |
int j, k;
|
2843 |
for(j=0; j<ic->nb_programs; j++) { |
2844 |
av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id, |
2845 |
ic->programs[j]->name ? ic->programs[j]->name : "");
|
2846 |
for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) |
2847 |
dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output); |
2848 |
} |
2849 |
} else
|
2850 |
for(i=0;i<ic->nb_streams;i++) |
2851 |
dump_stream_format(ic, i, index, is_output); |
2852 |
} |
2853 |
|
2854 |
#if LIBAVFORMAT_VERSION_MAJOR < 53 |
2855 |
int parse_image_size(int *width_ptr, int *height_ptr, const char *str) |
2856 |
{ |
2857 |
return av_parse_video_frame_size(width_ptr, height_ptr, str);
|
2858 |
} |
2859 |
|
2860 |
int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg) |
2861 |
{ |
2862 |
AVRational frame_rate; |
2863 |
int ret = av_parse_video_frame_rate(&frame_rate, arg);
|
2864 |
*frame_rate_num= frame_rate.num; |
2865 |
*frame_rate_den= frame_rate.den; |
2866 |
return ret;
|
2867 |
} |
2868 |
#endif
|
2869 |
|
2870 |
int64_t av_gettime(void)
|
2871 |
{ |
2872 |
struct timeval tv;
|
2873 |
gettimeofday(&tv,NULL);
|
2874 |
return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec; |
2875 |
} |
2876 |
|
2877 |
int64_t parse_date(const char *datestr, int duration) |
2878 |
{ |
2879 |
const char *p; |
2880 |
int64_t t; |
2881 |
struct tm dt;
|
2882 |
int i;
|
2883 |
static const char * const date_fmt[] = { |
2884 |
"%Y-%m-%d",
|
2885 |
"%Y%m%d",
|
2886 |
}; |
2887 |
static const char * const time_fmt[] = { |
2888 |
"%H:%M:%S",
|
2889 |
"%H%M%S",
|
2890 |
}; |
2891 |
const char *q; |
2892 |
int is_utc, len;
|
2893 |
char lastch;
|
2894 |
int negative = 0; |
2895 |
|
2896 |
#undef time
|
2897 |
time_t now = time(0);
|
2898 |
|
2899 |
len = strlen(datestr); |
2900 |
if (len > 0) |
2901 |
lastch = datestr[len - 1];
|
2902 |
else
|
2903 |
lastch = '\0';
|
2904 |
is_utc = (lastch == 'z' || lastch == 'Z'); |
2905 |
|
2906 |
memset(&dt, 0, sizeof(dt)); |
2907 |
|
2908 |
p = datestr; |
2909 |
q = NULL;
|
2910 |
if (!duration) {
|
2911 |
/* parse the year-month-day part */
|
2912 |
for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) { |
2913 |
q = small_strptime(p, date_fmt[i], &dt); |
2914 |
if (q) {
|
2915 |
break;
|
2916 |
} |
2917 |
} |
2918 |
|
2919 |
/* if the year-month-day part is missing, then take the
|
2920 |
* current year-month-day time */
|
2921 |
if (!q) {
|
2922 |
if (is_utc) {
|
2923 |
dt = *gmtime(&now); |
2924 |
} else {
|
2925 |
dt = *localtime(&now); |
2926 |
} |
2927 |
dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
|
2928 |
} else {
|
2929 |
p = q; |
2930 |
} |
2931 |
|
2932 |
if (*p == 'T' || *p == 't' || *p == ' ') |
2933 |
p++; |
2934 |
|
2935 |
/* parse the hour-minute-second part */
|
2936 |
for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) { |
2937 |
q = small_strptime(p, time_fmt[i], &dt); |
2938 |
if (q) {
|
2939 |
break;
|
2940 |
} |
2941 |
} |
2942 |
} else {
|
2943 |
/* parse datestr as a duration */
|
2944 |
if (p[0] == '-') { |
2945 |
negative = 1;
|
2946 |
++p; |
2947 |
} |
2948 |
/* parse datestr as HH:MM:SS */
|
2949 |
q = small_strptime(p, time_fmt[0], &dt);
|
2950 |
if (!q) {
|
2951 |
/* parse datestr as S+ */
|
2952 |
dt.tm_sec = strtol(p, (char **)&q, 10); |
2953 |
if (q == p)
|
2954 |
/* the parsing didn't succeed */
|
2955 |
return INT64_MIN;
|
2956 |
dt.tm_min = 0;
|
2957 |
dt.tm_hour = 0;
|
2958 |
} |
2959 |
} |
2960 |
|
2961 |
/* Now we have all the fields that we can get */
|
2962 |
if (!q) {
|
2963 |
return INT64_MIN;
|
2964 |
} |
2965 |
|
2966 |
if (duration) {
|
2967 |
t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec; |
2968 |
} else {
|
2969 |
dt.tm_isdst = -1; /* unknown */ |
2970 |
if (is_utc) {
|
2971 |
t = mktimegm(&dt); |
2972 |
} else {
|
2973 |
t = mktime(&dt); |
2974 |
} |
2975 |
} |
2976 |
|
2977 |
t *= 1000000;
|
2978 |
|
2979 |
/* parse the .m... part */
|
2980 |
if (*q == '.') { |
2981 |
int val, n;
|
2982 |
q++; |
2983 |
for (val = 0, n = 100000; n >= 1; n /= 10, q++) { |
2984 |
if (!isdigit(*q))
|
2985 |
break;
|
2986 |
val += n * (*q - '0');
|
2987 |
} |
2988 |
t += val; |
2989 |
} |
2990 |
return negative ? -t : t;
|
2991 |
} |
2992 |
|
2993 |
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info) |
2994 |
{ |
2995 |
const char *p; |
2996 |
char tag[128], *q; |
2997 |
|
2998 |
p = info; |
2999 |
if (*p == '?') |
3000 |
p++; |
3001 |
for(;;) {
|
3002 |
q = tag; |
3003 |
while (*p != '\0' && *p != '=' && *p != '&') { |
3004 |
if ((q - tag) < sizeof(tag) - 1) |
3005 |
*q++ = *p; |
3006 |
p++; |
3007 |
} |
3008 |
*q = '\0';
|
3009 |
q = arg; |
3010 |
if (*p == '=') { |
3011 |
p++; |
3012 |
while (*p != '&' && *p != '\0') { |
3013 |
if ((q - arg) < arg_size - 1) { |
3014 |
if (*p == '+') |
3015 |
*q++ = ' ';
|
3016 |
else
|
3017 |
*q++ = *p; |
3018 |
} |
3019 |
p++; |
3020 |
} |
3021 |
*q = '\0';
|
3022 |
} |
3023 |
if (!strcmp(tag, tag1))
|
3024 |
return 1; |
3025 |
if (*p != '&') |
3026 |
break;
|
3027 |
p++; |
3028 |
} |
3029 |
return 0; |
3030 |
} |
3031 |
|
3032 |
int av_get_frame_filename(char *buf, int buf_size, |
3033 |
const char *path, int number) |
3034 |
{ |
3035 |
const char *p; |
3036 |
char *q, buf1[20], c; |
3037 |
int nd, len, percentd_found;
|
3038 |
|
3039 |
q = buf; |
3040 |
p = path; |
3041 |
percentd_found = 0;
|
3042 |
for(;;) {
|
3043 |
c = *p++; |
3044 |
if (c == '\0') |
3045 |
break;
|
3046 |
if (c == '%') { |
3047 |
do {
|
3048 |
nd = 0;
|
3049 |
while (isdigit(*p)) {
|
3050 |
nd = nd * 10 + *p++ - '0'; |
3051 |
} |
3052 |
c = *p++; |
3053 |
} while (isdigit(c));
|
3054 |
|
3055 |
switch(c) {
|
3056 |
case '%': |
3057 |
goto addchar;
|
3058 |
case 'd': |
3059 |
if (percentd_found)
|
3060 |
goto fail;
|
3061 |
percentd_found = 1;
|
3062 |
snprintf(buf1, sizeof(buf1), "%0*d", nd, number); |
3063 |
len = strlen(buf1); |
3064 |
if ((q - buf + len) > buf_size - 1) |
3065 |
goto fail;
|
3066 |
memcpy(q, buf1, len); |
3067 |
q += len; |
3068 |
break;
|
3069 |
default:
|
3070 |
goto fail;
|
3071 |
} |
3072 |
} else {
|
3073 |
addchar:
|
3074 |
if ((q - buf) < buf_size - 1) |
3075 |
*q++ = c; |
3076 |
} |
3077 |
} |
3078 |
if (!percentd_found)
|
3079 |
goto fail;
|
3080 |
*q = '\0';
|
3081 |
return 0; |
3082 |
fail:
|
3083 |
*q = '\0';
|
3084 |
return -1; |
3085 |
} |
3086 |
|
3087 |
static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size) |
3088 |
{ |
3089 |
int len, i, j, c;
|
3090 |
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
3091 |
|
3092 |
for(i=0;i<size;i+=16) { |
3093 |
len = size - i; |
3094 |
if (len > 16) |
3095 |
len = 16;
|
3096 |
PRINT("%08x ", i);
|
3097 |
for(j=0;j<16;j++) { |
3098 |
if (j < len)
|
3099 |
PRINT(" %02x", buf[i+j]);
|
3100 |
else
|
3101 |
PRINT(" ");
|
3102 |
} |
3103 |
PRINT(" ");
|
3104 |
for(j=0;j<len;j++) { |
3105 |
c = buf[i+j]; |
3106 |
if (c < ' ' || c > '~') |
3107 |
c = '.';
|
3108 |
PRINT("%c", c);
|
3109 |
} |
3110 |
PRINT("\n");
|
3111 |
} |
3112 |
#undef PRINT
|
3113 |
} |
3114 |
|
3115 |
void av_hex_dump(FILE *f, uint8_t *buf, int size) |
3116 |
{ |
3117 |
hex_dump_internal(NULL, f, 0, buf, size); |
3118 |
} |
3119 |
|
3120 |
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size) |
3121 |
{ |
3122 |
hex_dump_internal(avcl, NULL, level, buf, size);
|
3123 |
} |
3124 |
|
3125 |
//FIXME needs to know the time_base
|
3126 |
static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload) |
3127 |
{ |
3128 |
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
3129 |
PRINT("stream #%d:\n", pkt->stream_index);
|
3130 |
PRINT(" keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0)); |
3131 |
PRINT(" duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE); |
3132 |
/* DTS is _always_ valid after av_read_frame() */
|
3133 |
PRINT(" dts=");
|
3134 |
if (pkt->dts == AV_NOPTS_VALUE)
|
3135 |
PRINT("N/A");
|
3136 |
else
|
3137 |
PRINT("%0.3f", (double)pkt->dts / AV_TIME_BASE); |
3138 |
/* PTS may not be known if B-frames are present. */
|
3139 |
PRINT(" pts=");
|
3140 |
if (pkt->pts == AV_NOPTS_VALUE)
|
3141 |
PRINT("N/A");
|
3142 |
else
|
3143 |
PRINT("%0.3f", (double)pkt->pts / AV_TIME_BASE); |
3144 |
PRINT("\n");
|
3145 |
PRINT(" size=%d\n", pkt->size);
|
3146 |
#undef PRINT
|
3147 |
if (dump_payload)
|
3148 |
av_hex_dump(f, pkt->data, pkt->size); |
3149 |
} |
3150 |
|
3151 |
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload) |
3152 |
{ |
3153 |
pkt_dump_internal(NULL, f, 0, pkt, dump_payload); |
3154 |
} |
3155 |
|
3156 |
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload) |
3157 |
{ |
3158 |
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload);
|
3159 |
} |
3160 |
|
3161 |
void url_split(char *proto, int proto_size, |
3162 |
char *authorization, int authorization_size, |
3163 |
char *hostname, int hostname_size, |
3164 |
int *port_ptr,
|
3165 |
char *path, int path_size, |
3166 |
const char *url) |
3167 |
{ |
3168 |
const char *p, *ls, *at, *col, *brk; |
3169 |
|
3170 |
if (port_ptr) *port_ptr = -1; |
3171 |
if (proto_size > 0) proto[0] = 0; |
3172 |
if (authorization_size > 0) authorization[0] = 0; |
3173 |
if (hostname_size > 0) hostname[0] = 0; |
3174 |
if (path_size > 0) path[0] = 0; |
3175 |
|
3176 |
/* parse protocol */
|
3177 |
if ((p = strchr(url, ':'))) { |
3178 |
av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
|
3179 |
p++; /* skip ':' */
|
3180 |
if (*p == '/') p++; |
3181 |
if (*p == '/') p++; |
3182 |
} else {
|
3183 |
/* no protocol means plain filename */
|
3184 |
av_strlcpy(path, url, path_size); |
3185 |
return;
|
3186 |
} |
3187 |
|
3188 |
/* separate path from hostname */
|
3189 |
ls = strchr(p, '/');
|
3190 |
if(!ls)
|
3191 |
ls = strchr(p, '?');
|
3192 |
if(ls)
|
3193 |
av_strlcpy(path, ls, path_size); |
3194 |
else
|
3195 |
ls = &p[strlen(p)]; // XXX
|
3196 |
|
3197 |
/* the rest is hostname, use that to parse auth/port */
|
3198 |
if (ls != p) {
|
3199 |
/* authorization (user[:pass]@hostname) */
|
3200 |
if ((at = strchr(p, '@')) && at < ls) { |
3201 |
av_strlcpy(authorization, p, |
3202 |
FFMIN(authorization_size, at + 1 - p));
|
3203 |
p = at + 1; /* skip '@' */ |
3204 |
} |
3205 |
|
3206 |
if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { |
3207 |
/* [host]:port */
|
3208 |
av_strlcpy(hostname, p + 1,
|
3209 |
FFMIN(hostname_size, brk - p)); |
3210 |
if (brk[1] == ':' && port_ptr) |
3211 |
*port_ptr = atoi(brk + 2);
|
3212 |
} else if ((col = strchr(p, ':')) && col < ls) { |
3213 |
av_strlcpy(hostname, p, |
3214 |
FFMIN(col + 1 - p, hostname_size));
|
3215 |
if (port_ptr) *port_ptr = atoi(col + 1); |
3216 |
} else
|
3217 |
av_strlcpy(hostname, p, |
3218 |
FFMIN(ls + 1 - p, hostname_size));
|
3219 |
} |
3220 |
} |
3221 |
|
3222 |
char *ff_data_to_hex(char *buff, const uint8_t *src, int s) |
3223 |
{ |
3224 |
int i;
|
3225 |
static const char hex_table[16] = { '0', '1', '2', '3', |
3226 |
'4', '5', '6', '7', |
3227 |
'8', '9', 'A', 'B', |
3228 |
'C', 'D', 'E', 'F' }; |
3229 |
|
3230 |
for(i = 0; i < s; i++) { |
3231 |
buff[i * 2] = hex_table[src[i] >> 4]; |
3232 |
buff[i * 2 + 1] = hex_table[src[i] & 0xF]; |
3233 |
} |
3234 |
|
3235 |
return buff;
|
3236 |
} |
3237 |
|
3238 |
void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
3239 |
int pts_num, int pts_den) |
3240 |
{ |
3241 |
unsigned int gcd= av_gcd(pts_num, pts_den); |
3242 |
s->pts_wrap_bits = pts_wrap_bits; |
3243 |
s->time_base.num = pts_num/gcd; |
3244 |
s->time_base.den = pts_den/gcd; |
3245 |
|
3246 |
if(gcd>1) |
3247 |
av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, gcd); |
3248 |
} |