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ffmpeg / libavformat / img2.c @ 72415b2a

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/*
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 * Image format
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 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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 * Copyright (c) 2004 Michael Niedermayer
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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 "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include <strings.h>
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typedef struct {
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    int img_first;
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    int img_last;
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    int img_number;
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    int img_count;
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    int is_pipe;
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    char path[1024];
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} VideoData;
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typedef struct {
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    enum CodecID id;
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    const char *str;
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} IdStrMap;
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static const IdStrMap img_tags[] = {
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    { CODEC_ID_MJPEG     , "jpeg"},
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    { CODEC_ID_MJPEG     , "jpg"},
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    { CODEC_ID_LJPEG     , "ljpg"},
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    { CODEC_ID_PNG       , "png"},
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    { CODEC_ID_PNG       , "mng"},
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    { CODEC_ID_PPM       , "ppm"},
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    { CODEC_ID_PPM       , "pnm"},
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    { CODEC_ID_PGM       , "pgm"},
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    { CODEC_ID_PGMYUV    , "pgmyuv"},
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    { CODEC_ID_PBM       , "pbm"},
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    { CODEC_ID_PAM       , "pam"},
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    { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
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    { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
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    { CODEC_ID_MPEG4     , "mpg4-img"},
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    { CODEC_ID_FFV1      , "ffv1-img"},
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    { CODEC_ID_RAWVIDEO  , "y"},
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    { CODEC_ID_BMP       , "bmp"},
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    { CODEC_ID_GIF       , "gif"},
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    { CODEC_ID_TARGA     , "tga"},
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    { CODEC_ID_TIFF      , "tiff"},
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    { CODEC_ID_TIFF      , "tif"},
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    { CODEC_ID_SGI       , "sgi"},
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    { CODEC_ID_PTX       , "ptx"},
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    { CODEC_ID_PCX       , "pcx"},
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    { CODEC_ID_SUNRAST   , "sun"},
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    { CODEC_ID_SUNRAST   , "ras"},
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    { CODEC_ID_SUNRAST   , "rs"},
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    { CODEC_ID_SUNRAST   , "im1"},
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    { CODEC_ID_SUNRAST   , "im8"},
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    { CODEC_ID_SUNRAST   , "im24"},
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    { CODEC_ID_SUNRAST   , "sunras"},
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    { CODEC_ID_JPEG2000  , "jp2"},
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    { CODEC_ID_DPX       , "dpx"},
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    { CODEC_ID_NONE      , NULL}
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};
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static const int sizes[][2] = {
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    { 640, 480 },
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    { 720, 480 },
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    { 720, 576 },
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    { 352, 288 },
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    { 352, 240 },
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    { 160, 128 },
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    { 512, 384 },
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    { 640, 352 },
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    { 640, 240 },
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};
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static int infer_size(int *width_ptr, int *height_ptr, int size)
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{
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    int i;
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    for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
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        if ((sizes[i][0] * sizes[i][1]) == size) {
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            *width_ptr = sizes[i][0];
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            *height_ptr = sizes[i][1];
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            return 0;
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        }
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    }
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    return -1;
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}
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static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
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{
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    str= strrchr(str, '.');
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    if(!str) return CODEC_ID_NONE;
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    str++;
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    while (tags->id) {
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        if (!strcasecmp(str, tags->str))
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            return tags->id;
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        tags++;
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    }
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    return CODEC_ID_NONE;
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}
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/* return -1 if no image found */
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static int find_image_range(int *pfirst_index, int *plast_index,
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                            const char *path)
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{
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    char buf[1024];
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    int range, last_index, range1, first_index;
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    /* find the first image */
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    for(first_index = 0; first_index < 5; first_index++) {
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        if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
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            *pfirst_index =
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            *plast_index = 1;
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            if(url_exist(buf))
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                return 0;
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            return -1;
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        }
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        if (url_exist(buf))
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            break;
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    }
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    if (first_index == 5)
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        goto fail;
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    /* find the last image */
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    last_index = first_index;
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    for(;;) {
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        range = 0;
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        for(;;) {
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            if (!range)
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                range1 = 1;
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            else
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                range1 = 2 * range;
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            if (av_get_frame_filename(buf, sizeof(buf), path,
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                                      last_index + range1) < 0)
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                goto fail;
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            if (!url_exist(buf))
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                break;
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            range = range1;
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            /* just in case... */
157
            if (range >= (1 << 30))
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                goto fail;
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        }
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        /* we are sure than image last_index + range exists */
161
        if (!range)
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            break;
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        last_index += range;
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    }
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    *pfirst_index = first_index;
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    *plast_index = last_index;
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    return 0;
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 fail:
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    return -1;
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}
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172

    
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static int image_probe(AVProbeData *p)
174
{
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    if (p->filename && av_str2id(img_tags, p->filename)) {
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        if (av_filename_number_test(p->filename))
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            return AVPROBE_SCORE_MAX;
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        else
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            return AVPROBE_SCORE_MAX/2;
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    }
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    return 0;
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}
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enum CodecID av_guess_image2_codec(const char *filename){
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    return av_str2id(img_tags, filename);
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}
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static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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{
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    VideoData *s = s1->priv_data;
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    int first_index, last_index;
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    AVStream *st;
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    s1->ctx_flags |= AVFMTCTX_NOHEADER;
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    st = av_new_stream(s1, 0);
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    if (!st) {
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        return AVERROR(ENOMEM);
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    }
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    av_strlcpy(s->path, s1->filename, sizeof(s->path));
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    s->img_number = 0;
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    s->img_count = 0;
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    /* find format */
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    if (s1->iformat->flags & AVFMT_NOFILE)
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        s->is_pipe = 0;
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    else{
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        s->is_pipe = 1;
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        st->need_parsing = AVSTREAM_PARSE_FULL;
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    }
212

    
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    if (!ap->time_base.num) {
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        av_set_pts_info(st, 60, 1, 25);
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    } else {
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        av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
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    }
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    if(ap->width && ap->height){
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        st->codec->width = ap->width;
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        st->codec->height= ap->height;
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    }
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    if (!s->is_pipe) {
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        if (find_image_range(&first_index, &last_index, s->path) < 0)
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            return AVERROR(ENOENT);
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        s->img_first = first_index;
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        s->img_last = last_index;
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        s->img_number = first_index;
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        /* compute duration */
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        st->start_time = 0;
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        st->duration = last_index - first_index + 1;
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    }
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    if(s1->video_codec_id){
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        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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        st->codec->codec_id = s1->video_codec_id;
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    }else if(s1->audio_codec_id){
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        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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        st->codec->codec_id = s1->audio_codec_id;
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    }else{
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        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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        st->codec->codec_id = av_str2id(img_tags, s->path);
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    }
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    if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
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        st->codec->pix_fmt = ap->pix_fmt;
247

    
248
    return 0;
249
}
250

    
251
static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
252
{
253
    VideoData *s = s1->priv_data;
254
    char filename[1024];
255
    int i;
256
    int size[3]={0}, ret[3]={0};
257
    ByteIOContext *f[3];
258
    AVCodecContext *codec= s1->streams[0]->codec;
259

    
260
    if (!s->is_pipe) {
261
        /* loop over input */
262
        if (s1->loop_input && s->img_number > s->img_last) {
263
            s->img_number = s->img_first;
264
        }
265
        if (s->img_number > s->img_last)
266
            return AVERROR_EOF;
267
        if (av_get_frame_filename(filename, sizeof(filename),
268
                                  s->path, s->img_number)<0 && s->img_number > 1)
269
            return AVERROR(EIO);
270
        for(i=0; i<3; i++){
271
            if (url_fopen(&f[i], filename, URL_RDONLY) < 0) {
272
                if(i==1)
273
                    break;
274
                av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
275
                return AVERROR(EIO);
276
            }
277
            size[i]= url_fsize(f[i]);
278

    
279
            if(codec->codec_id != CODEC_ID_RAWVIDEO)
280
                break;
281
            filename[ strlen(filename) - 1 ]= 'U' + i;
282
        }
283

    
284
        if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
285
            infer_size(&codec->width, &codec->height, size[0]);
286
    } else {
287
        f[0] = s1->pb;
288
        if (url_feof(f[0]))
289
            return AVERROR(EIO);
290
        size[0]= 4096;
291
    }
292

    
293
    av_new_packet(pkt, size[0] + size[1] + size[2]);
294
    pkt->stream_index = 0;
295
    pkt->flags |= PKT_FLAG_KEY;
296

    
297
    pkt->size= 0;
298
    for(i=0; i<3; i++){
299
        if(size[i]){
300
            ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
301
            if (!s->is_pipe)
302
                url_fclose(f[i]);
303
            if(ret[i]>0)
304
                pkt->size += ret[i];
305
        }
306
    }
307

    
308
    if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
309
        av_free_packet(pkt);
310
        return AVERROR(EIO); /* signal EOF */
311
    } else {
312
        s->img_count++;
313
        s->img_number++;
314
        return 0;
315
    }
316
}
317

    
318
#if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
319
/******************************************************/
320
/* image output */
321

    
322
static int img_write_header(AVFormatContext *s)
323
{
324
    VideoData *img = s->priv_data;
325

    
326
    img->img_number = 1;
327
    av_strlcpy(img->path, s->filename, sizeof(img->path));
328

    
329
    /* find format */
330
    if (s->oformat->flags & AVFMT_NOFILE)
331
        img->is_pipe = 0;
332
    else
333
        img->is_pipe = 1;
334

    
335
    return 0;
336
}
337

    
338
static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
339
{
340
    VideoData *img = s->priv_data;
341
    ByteIOContext *pb[3];
342
    char filename[1024];
343
    AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
344
    int i;
345

    
346
    if (!img->is_pipe) {
347
        if (av_get_frame_filename(filename, sizeof(filename),
348
                                  img->path, img->img_number) < 0 && img->img_number>1) {
349
            av_log(s, AV_LOG_ERROR, "Could not get frame filename from pattern\n");
350
            return AVERROR(EIO);
351
        }
352
        for(i=0; i<3; i++){
353
            if (url_fopen(&pb[i], filename, URL_WRONLY) < 0) {
354
                av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
355
                return AVERROR(EIO);
356
            }
357

    
358
            if(codec->codec_id != CODEC_ID_RAWVIDEO)
359
                break;
360
            filename[ strlen(filename) - 1 ]= 'U' + i;
361
        }
362
    } else {
363
        pb[0] = s->pb;
364
    }
365

    
366
    if(codec->codec_id == CODEC_ID_RAWVIDEO){
367
        int ysize = codec->width * codec->height;
368
        put_buffer(pb[0], pkt->data        , ysize);
369
        put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
370
        put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
371
        put_flush_packet(pb[1]);
372
        put_flush_packet(pb[2]);
373
        url_fclose(pb[1]);
374
        url_fclose(pb[2]);
375
    }else{
376
        if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
377
            AVStream *st = s->streams[0];
378
            if(st->codec->extradata_size > 8 &&
379
               AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
380
                if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
381
                    goto error;
382
                put_be32(pb[0], 12);
383
                put_tag (pb[0], "jP  ");
384
                put_be32(pb[0], 0x0D0A870A); // signature
385
                put_be32(pb[0], 20);
386
                put_tag (pb[0], "ftyp");
387
                put_tag (pb[0], "jp2 ");
388
                put_be32(pb[0], 0);
389
                put_tag (pb[0], "jp2 ");
390
                put_buffer(pb[0], st->codec->extradata, st->codec->extradata_size);
391
            }else if(pkt->size < 8 ||
392
                     (!st->codec->extradata_size &&
393
                      AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
394
            error:
395
                av_log(s, AV_LOG_ERROR, "malformated jpeg2000 codestream\n");
396
                return -1;
397
            }
398
        }
399
        put_buffer(pb[0], pkt->data, pkt->size);
400
    }
401
    put_flush_packet(pb[0]);
402
    if (!img->is_pipe) {
403
        url_fclose(pb[0]);
404
    }
405

    
406
    img->img_number++;
407
    return 0;
408
}
409

    
410
#endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
411

    
412
/* input */
413
#if CONFIG_IMAGE2_DEMUXER
414
AVInputFormat image2_demuxer = {
415
    "image2",
416
    NULL_IF_CONFIG_SMALL("image2 sequence"),
417
    sizeof(VideoData),
418
    image_probe,
419
    img_read_header,
420
    img_read_packet,
421
    NULL,
422
    NULL,
423
    NULL,
424
    AVFMT_NOFILE,
425
};
426
#endif
427
#if CONFIG_IMAGE2PIPE_DEMUXER
428
AVInputFormat image2pipe_demuxer = {
429
    "image2pipe",
430
    NULL_IF_CONFIG_SMALL("piped image2 sequence"),
431
    sizeof(VideoData),
432
    NULL, /* no probe */
433
    img_read_header,
434
    img_read_packet,
435
};
436
#endif
437

    
438
/* output */
439
#if CONFIG_IMAGE2_MUXER
440
AVOutputFormat image2_muxer = {
441
    "image2",
442
    NULL_IF_CONFIG_SMALL("image2 sequence"),
443
    "",
444
    "bmp,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,ppm,sgi,tif,tiff,jp2",
445
    sizeof(VideoData),
446
    CODEC_ID_NONE,
447
    CODEC_ID_MJPEG,
448
    img_write_header,
449
    img_write_packet,
450
    NULL,
451
    .flags= AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE
452
};
453
#endif
454
#if CONFIG_IMAGE2PIPE_MUXER
455
AVOutputFormat image2pipe_muxer = {
456
    "image2pipe",
457
    NULL_IF_CONFIG_SMALL("piped image2 sequence"),
458
    "",
459
    "",
460
    sizeof(VideoData),
461
    CODEC_ID_NONE,
462
    CODEC_ID_MJPEG,
463
    img_write_header,
464
    img_write_packet,
465
    .flags= AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
466
};
467
#endif