libavformat/img2.c

   1 /*
   2  * Image format
   3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
   4  * Copyright (c) 2004 Michael Niedermayer
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "libavutil/intreadwrite.h"
  24 #include "libavutil/avstring.h"
  25 #include "avformat.h"
  26 #include <strings.h>
  27
  28 typedef struct {
  29     int img_first;
  30     int img_last;
  31     int img_number;
  32     int img_count;
  33     int is_pipe;
  34     char path[1024];
  35 } VideoData;
  36
  37 typedef struct {
  38     enum CodecID id;
  39     const char *str;
  40 } IdStrMap;
  41
  42 static const IdStrMap img_tags[] = {
  43     { CODEC_ID_MJPEG     , "jpeg"},
  44     { CODEC_ID_MJPEG     , "jpg"},
  45     { CODEC_ID_LJPEG     , "ljpg"},
  46     { CODEC_ID_PNG       , "png"},
  47     { CODEC_ID_PNG       , "mng"},
  48     { CODEC_ID_PPM       , "ppm"},
  49     { CODEC_ID_PPM       , "pnm"},
  50     { CODEC_ID_PGM       , "pgm"},
  51     { CODEC_ID_PGMYUV    , "pgmyuv"},
  52     { CODEC_ID_PBM       , "pbm"},
  53     { CODEC_ID_PAM       , "pam"},
  54     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
  55     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
  56     { CODEC_ID_MPEG4     , "mpg4-img"},
  57     { CODEC_ID_FFV1      , "ffv1-img"},
  58     { CODEC_ID_RAWVIDEO  , "y"},
  59     { CODEC_ID_BMP       , "bmp"},
  60     { CODEC_ID_GIF       , "gif"},
  61     { CODEC_ID_TARGA     , "tga"},
  62     { CODEC_ID_TIFF      , "tiff"},
  63     { CODEC_ID_TIFF      , "tif"},
  64     { CODEC_ID_SGI       , "sgi"},
  65     { CODEC_ID_PTX       , "ptx"},
  66     { CODEC_ID_PCX       , "pcx"},
  67     { CODEC_ID_SUNRAST   , "sun"},
  68     { CODEC_ID_SUNRAST   , "ras"},
  69     { CODEC_ID_SUNRAST   , "rs"},
  70     { CODEC_ID_SUNRAST   , "im1"},
  71     { CODEC_ID_SUNRAST   , "im8"},
  72     { CODEC_ID_SUNRAST   , "im24"},
  73     { CODEC_ID_SUNRAST   , "sunras"},
  74     { CODEC_ID_JPEG2000  , "jp2"},
  75     { CODEC_ID_NONE      , NULL}
  76 };
  77
  78 static const int sizes[][2] = {
  79     { 640, 480 },
  80     { 720, 480 },
  81     { 720, 576 },
  82     { 352, 288 },
  83     { 352, 240 },
  84     { 160, 128 },
  85     { 512, 384 },
  86     { 640, 352 },
  87     { 640, 240 },
  88 };
  89
  90 static int infer_size(int *width_ptr, int *height_ptr, int size)
  91 {
  92     int i;
  93
  94     for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
  95         if ((sizes[i][0] * sizes[i][1]) == size) {
  96             *width_ptr = sizes[i][0];
  97             *height_ptr = sizes[i][1];
  98             return 0;
  99         }
 100     }
 101     return -1;
 102 }
 103 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
 104 {
 105     str= strrchr(str, '.');
 106     if(!str) return CODEC_ID_NONE;
 107     str++;
 108
 109     while (tags->id) {
 110         if (!strcasecmp(str, tags->str))
 111             return tags->id;
 112
 113         tags++;
 114     }
 115     return CODEC_ID_NONE;
 116 }
 117
 118 /* return -1 if no image found */
 119 static int find_image_range(int *pfirst_index, int *plast_index,
 120                             const char *path)
 121 {
 122     char buf[1024];
 123     int range, last_index, range1, first_index;
 124
 125     /* find the first image */
 126     for(first_index = 0; first_index < 5; first_index++) {
 127         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 128             *pfirst_index =
 129             *plast_index = 1;
 130             return 0;
 131         }
 132         if (url_exist(buf))
 133             break;
 134     }
 135     if (first_index == 5)
 136         goto fail;
 137
 138     /* find the last image */
 139     last_index = first_index;
 140     for(;;) {
 141         range = 0;
 142         for(;;) {
 143             if (!range)
 144                 range1 = 1;
 145             else
 146                 range1 = 2 * range;
 147             if (av_get_frame_filename(buf, sizeof(buf), path,
 148                                       last_index + range1) < 0)
 149                 goto fail;
 150             if (!url_exist(buf))
 151                 break;
 152             range = range1;
 153             /* just in case... */
 154             if (range >= (1 << 30))
 155                 goto fail;
 156         }
 157         /* we are sure than image last_index + range exists */
 158         if (!range)
 159             break;
 160         last_index += range;
 161     }
 162     *pfirst_index = first_index;
 163     *plast_index = last_index;
 164     return 0;
 165  fail:
 166     return -1;
 167 }
 168
 169
 170 static int image_probe(AVProbeData *p)
 171 {
 172     if (p->filename && av_str2id(img_tags, p->filename)) {
 173         if (av_filename_number_test(p->filename))
 174             return AVPROBE_SCORE_MAX;
 175         else
 176             return AVPROBE_SCORE_MAX/2;
 177     }
 178     return 0;
 179 }
 180
 181 enum CodecID av_guess_image2_codec(const char *filename){
 182     return av_str2id(img_tags, filename);
 183 }
 184
 185 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 186 {
 187     VideoData *s = s1->priv_data;
 188     int first_index, last_index;
 189     AVStream *st;
 190
 191     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 192
 193     st = av_new_stream(s1, 0);
 194     if (!st) {
 195         return AVERROR(ENOMEM);
 196     }
 197
 198     av_strlcpy(s->path, s1->filename, sizeof(s->path));
 199     s->img_number = 0;
 200     s->img_count = 0;
 201
 202     /* find format */
 203     if (s1->iformat->flags & AVFMT_NOFILE)
 204         s->is_pipe = 0;
 205     else{
 206         s->is_pipe = 1;
 207         st->need_parsing = AVSTREAM_PARSE_FULL;
 208     }
 209
 210     if (!ap->time_base.num) {
 211         av_set_pts_info(st, 60, 1, 25);
 212     } else {
 213         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 214     }
 215
 216     if(ap->width && ap->height){
 217         st->codec->width = ap->width;
 218         st->codec->height= ap->height;
 219     }
 220
 221     if (!s->is_pipe) {
 222         if (find_image_range(&first_index, &last_index, s->path) < 0)
 223             return AVERROR(EIO);
 224         s->img_first = first_index;
 225         s->img_last = last_index;
 226         s->img_number = first_index;
 227         /* compute duration */
 228         st->start_time = 0;
 229         st->duration = last_index - first_index + 1;
 230     }
 231
 232     if(ap->video_codec_id){
 233         st->codec->codec_type = CODEC_TYPE_VIDEO;
 234         st->codec->codec_id = ap->video_codec_id;
 235     }else if(ap->audio_codec_id){
 236         st->codec->codec_type = CODEC_TYPE_AUDIO;
 237         st->codec->codec_id = ap->audio_codec_id;
 238     }else{
 239         st->codec->codec_type = CODEC_TYPE_VIDEO;
 240         st->codec->codec_id = av_str2id(img_tags, s->path);
 241     }
 242     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 243         st->codec->pix_fmt = ap->pix_fmt;
 244
 245     return 0;
 246 }
 247
 248 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 249 {
 250     VideoData *s = s1->priv_data;
 251     char filename[1024];
 252     int i;
 253     int size[3]={0}, ret[3]={0};
 254     ByteIOContext *f[3];
 255     AVCodecContext *codec= s1->streams[0]->codec;
 256
 257     if (!s->is_pipe) {
 258         /* loop over input */
 259         if (s1->loop_input && s->img_number > s->img_last) {
 260             s->img_number = s->img_first;
 261         }
 262         if (av_get_frame_filename(filename, sizeof(filename),
 263                                   s->path, s->img_number)<0 && s->img_number > 1)
 264             return AVERROR(EIO);
 265         for(i=0; i<3; i++){
 266             if (url_fopen(&f[i], filename, URL_RDONLY) < 0)
 267                 return AVERROR(EIO);
 268             size[i]= url_fsize(f[i]);
 269
 270             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 271                 break;
 272             filename[ strlen(filename) - 1 ]= 'U' + i;
 273         }
 274
 275         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 276             infer_size(&codec->width, &codec->height, size[0]);
 277     } else {
 278         f[0] = s1->pb;
 279         if (url_feof(f[0]))
 280             return AVERROR(EIO);
 281         size[0]= 4096;
 282     }
 283
 284     av_new_packet(pkt, size[0] + size[1] + size[2]);
 285     pkt->stream_index = 0;
 286     pkt->flags |= PKT_FLAG_KEY;
 287
 288     pkt->size= 0;
 289     for(i=0; i<3; i++){
 290         if(size[i]){
 291             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 292             if (!s->is_pipe)
 293                 url_fclose(f[i]);
 294             if(ret[i]>0)
 295                 pkt->size += ret[i];
 296         }
 297     }
 298
 299     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 300         av_free_packet(pkt);
 301         return AVERROR(EIO); /* signal EOF */
 302     } else {
 303         s->img_count++;
 304         s->img_number++;
 305         return 0;
 306     }
 307 }
 308
 309 #if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
 310 /******************************************************/
 311 /* image output */
 312
 313 static int img_write_header(AVFormatContext *s)
 314 {
 315     VideoData *img = s->priv_data;
 316
 317     img->img_number = 1;
 318     av_strlcpy(img->path, s->filename, sizeof(img->path));
 319
 320     /* find format */
 321     if (s->oformat->flags & AVFMT_NOFILE)
 322         img->is_pipe = 0;
 323     else
 324         img->is_pipe = 1;
 325
 326     return 0;
 327 }
 328
 329 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 330 {
 331     VideoData *img = s->priv_data;
 332     ByteIOContext *pb[3];
 333     char filename[1024];
 334     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 335     int i;
 336
 337     if (!img->is_pipe) {
 338         if (av_get_frame_filename(filename, sizeof(filename),
 339                                   img->path, img->img_number) < 0 && img->img_number>1)
 340             return AVERROR(EIO);
 341         for(i=0; i<3; i++){
 342             if (url_fopen(&pb[i], filename, URL_WRONLY) < 0)
 343                 return AVERROR(EIO);
 344
 345             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 346                 break;
 347             filename[ strlen(filename) - 1 ]= 'U' + i;
 348         }
 349     } else {
 350         pb[0] = s->pb;
 351     }
 352
 353     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 354         int ysize = codec->width * codec->height;
 355         put_buffer(pb[0], pkt->data        , ysize);
 356         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 357         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 358         put_flush_packet(pb[1]);
 359         put_flush_packet(pb[2]);
 360         url_fclose(pb[1]);
 361         url_fclose(pb[2]);
 362     }else{
 363         put_buffer(pb[0], pkt->data, pkt->size);
 364     }
 365     put_flush_packet(pb[0]);
 366     if (!img->is_pipe) {
 367         url_fclose(pb[0]);
 368     }
 369
 370     img->img_number++;
 371     return 0;
 372 }
 373
 374 #endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
 375
 376 /* input */
 377 #if CONFIG_IMAGE2_DEMUXER
 378 AVInputFormat image2_demuxer = {
 379     "image2",
 380     NULL_IF_CONFIG_SMALL("image2 sequence"),
 381     sizeof(VideoData),
 382     image_probe,
 383     img_read_header,
 384     img_read_packet,
 385     NULL,
 386     NULL,
 387     NULL,
 388     AVFMT_NOFILE,
 389 };
 390 #endif
 391 #if CONFIG_IMAGE2PIPE_DEMUXER
 392 AVInputFormat image2pipe_demuxer = {
 393     "image2pipe",
 394     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 395     sizeof(VideoData),
 396     NULL, /* no probe */
 397     img_read_header,
 398     img_read_packet,
 399 };
 400 #endif
 401
 402 /* output */
 403 #if CONFIG_IMAGE2_MUXER
 404 AVOutputFormat image2_muxer = {
 405     "image2",
 406     NULL_IF_CONFIG_SMALL("image2 sequence"),
 407     "",
 408     "bmp,jpeg,jpg,ljpg,pam,pbm,pgm,pgmyuv,png,ppm,sgi,tif,tiff",
 409     sizeof(VideoData),
 410     CODEC_ID_NONE,
 411     CODEC_ID_MJPEG,
 412     img_write_header,
 413     img_write_packet,
 414     NULL,
 415     .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
 416 };
 417 #endif
 418 #if CONFIG_IMAGE2PIPE_MUXER
 419 AVOutputFormat image2pipe_muxer = {
 420     "image2pipe",
 421     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 422     "",
 423     "",
 424     sizeof(VideoData),
 425     CODEC_ID_NONE,
 426     CODEC_ID_MJPEG,
 427     img_write_header,
 428     img_write_packet,
 429     .flags= AVFMT_NOTIMESTAMPS
 430 };
 431 #endif