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_DPX       , "dpx"},
  76     { CODEC_ID_NONE      , NULL}
  77 };
  78
  79 static const int sizes[][2] = {
  80     { 640, 480 },
  81     { 720, 480 },
  82     { 720, 576 },
  83     { 352, 288 },
  84     { 352, 240 },
  85     { 160, 128 },
  86     { 512, 384 },
  87     { 640, 352 },
  88     { 640, 240 },
  89 };
  90
  91 static int infer_size(int *width_ptr, int *height_ptr, int size)
  92 {
  93     int i;
  94
  95     for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
  96         if ((sizes[i][0] * sizes[i][1]) == size) {
  97             *width_ptr = sizes[i][0];
  98             *height_ptr = sizes[i][1];
  99             return 0;
 100         }
 101     }
 102     return -1;
 103 }
 104 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
 105 {
 106     str= strrchr(str, '.');
 107     if(!str) return CODEC_ID_NONE;
 108     str++;
 109
 110     while (tags->id) {
 111         if (!strcasecmp(str, tags->str))
 112             return tags->id;
 113
 114         tags++;
 115     }
 116     return CODEC_ID_NONE;
 117 }
 118
 119 /* return -1 if no image found */
 120 static int find_image_range(int *pfirst_index, int *plast_index,
 121                             const char *path)
 122 {
 123     char buf[1024];
 124     int range, last_index, range1, first_index;
 125
 126     /* find the first image */
 127     for(first_index = 0; first_index < 5; first_index++) {
 128         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 129             *pfirst_index =
 130             *plast_index = 1;
 131             if(url_exist(buf))
 132                 return 0;
 133             return -1;
 134         }
 135         if (url_exist(buf))
 136             break;
 137     }
 138     if (first_index == 5)
 139         goto fail;
 140
 141     /* find the last image */
 142     last_index = first_index;
 143     for(;;) {
 144         range = 0;
 145         for(;;) {
 146             if (!range)
 147                 range1 = 1;
 148             else
 149                 range1 = 2 * range;
 150             if (av_get_frame_filename(buf, sizeof(buf), path,
 151                                       last_index + range1) < 0)
 152                 goto fail;
 153             if (!url_exist(buf))
 154                 break;
 155             range = range1;
 156             /* just in case... */
 157             if (range >= (1 << 30))
 158                 goto fail;
 159         }
 160         /* we are sure than image last_index + range exists */
 161         if (!range)
 162             break;
 163         last_index += range;
 164     }
 165     *pfirst_index = first_index;
 166     *plast_index = last_index;
 167     return 0;
 168  fail:
 169     return -1;
 170 }
 171
 172
 173 static int image_probe(AVProbeData *p)
 174 {
 175     if (p->filename && av_str2id(img_tags, p->filename)) {
 176         if (av_filename_number_test(p->filename))
 177             return AVPROBE_SCORE_MAX;
 178         else
 179             return AVPROBE_SCORE_MAX/2;
 180     }
 181     return 0;
 182 }
 183
 184 enum CodecID av_guess_image2_codec(const char *filename){
 185     return av_str2id(img_tags, filename);
 186 }
 187
 188 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 189 {
 190     VideoData *s = s1->priv_data;
 191     int first_index, last_index;
 192     AVStream *st;
 193
 194     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 195
 196     st = av_new_stream(s1, 0);
 197     if (!st) {
 198         return AVERROR(ENOMEM);
 199     }
 200
 201     av_strlcpy(s->path, s1->filename, sizeof(s->path));
 202     s->img_number = 0;
 203     s->img_count = 0;
 204
 205     /* find format */
 206     if (s1->iformat->flags & AVFMT_NOFILE)
 207         s->is_pipe = 0;
 208     else{
 209         s->is_pipe = 1;
 210         st->need_parsing = AVSTREAM_PARSE_FULL;
 211     }
 212
 213     if (!ap->time_base.num) {
 214         av_set_pts_info(st, 60, 1, 25);
 215     } else {
 216         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 217     }
 218
 219     if(ap->width && ap->height){
 220         st->codec->width = ap->width;
 221         st->codec->height= ap->height;
 222     }
 223
 224     if (!s->is_pipe) {
 225         if (find_image_range(&first_index, &last_index, s->path) < 0)
 226             return AVERROR(ENOENT);
 227         s->img_first = first_index;
 228         s->img_last = last_index;
 229         s->img_number = first_index;
 230         /* compute duration */
 231         st->start_time = 0;
 232         st->duration = last_index - first_index + 1;
 233     }
 234
 235     if(ap->video_codec_id){
 236         st->codec->codec_type = CODEC_TYPE_VIDEO;
 237         st->codec->codec_id = ap->video_codec_id;
 238     }else if(ap->audio_codec_id){
 239         st->codec->codec_type = CODEC_TYPE_AUDIO;
 240         st->codec->codec_id = ap->audio_codec_id;
 241     }else{
 242         st->codec->codec_type = CODEC_TYPE_VIDEO;
 243         st->codec->codec_id = av_str2id(img_tags, s->path);
 244     }
 245     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 246         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                 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
 273                 return AVERROR(EIO);
 274             }
 275             size[i]= url_fsize(f[i]);
 276
 277             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 278                 break;
 279             filename[ strlen(filename) - 1 ]= 'U' + i;
 280         }
 281
 282         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 283             infer_size(&codec->width, &codec->height, size[0]);
 284     } else {
 285         f[0] = s1->pb;
 286         if (url_feof(f[0]))
 287             return AVERROR(EIO);
 288         size[0]= 4096;
 289     }
 290
 291     av_new_packet(pkt, size[0] + size[1] + size[2]);
 292     pkt->stream_index = 0;
 293     pkt->flags |= PKT_FLAG_KEY;
 294
 295     pkt->size= 0;
 296     for(i=0; i<3; i++){
 297         if(size[i]){
 298             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 299             if (!s->is_pipe)
 300                 url_fclose(f[i]);
 301             if(ret[i]>0)
 302                 pkt->size += ret[i];
 303         }
 304     }
 305
 306     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 307         av_free_packet(pkt);
 308         return AVERROR(EIO); /* signal EOF */
 309     } else {
 310         s->img_count++;
 311         s->img_number++;
 312         return 0;
 313     }
 314 }
 315
 316 #if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
 317 /******************************************************/
 318 /* image output */
 319
 320 static int img_write_header(AVFormatContext *s)
 321 {
 322     VideoData *img = s->priv_data;
 323
 324     img->img_number = 1;
 325     av_strlcpy(img->path, s->filename, sizeof(img->path));
 326
 327     /* find format */
 328     if (s->oformat->flags & AVFMT_NOFILE)
 329         img->is_pipe = 0;
 330     else
 331         img->is_pipe = 1;
 332
 333     return 0;
 334 }
 335
 336 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 337 {
 338     VideoData *img = s->priv_data;
 339     ByteIOContext *pb[3];
 340     char filename[1024];
 341     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 342     int i;
 343
 344     if (!img->is_pipe) {
 345         if (av_get_frame_filename(filename, sizeof(filename),
 346                                   img->path, img->img_number) < 0 && img->img_number>1)
 347             return AVERROR(EIO);
 348         for(i=0; i<3; i++){
 349             if (url_fopen(&pb[i], filename, URL_WRONLY) < 0) {
 350                 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
 351                 return AVERROR(EIO);
 352             }
 353
 354             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 355                 break;
 356             filename[ strlen(filename) - 1 ]= 'U' + i;
 357         }
 358     } else {
 359         pb[0] = s->pb;
 360     }
 361
 362     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 363         int ysize = codec->width * codec->height;
 364         put_buffer(pb[0], pkt->data        , ysize);
 365         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 366         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 367         put_flush_packet(pb[1]);
 368         put_flush_packet(pb[2]);
 369         url_fclose(pb[1]);
 370         url_fclose(pb[2]);
 371     }else{
 372         if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
 373             AVStream *st = s->streams[0];
 374             if(st->codec->extradata_size > 8 &&
 375                AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
 376                 if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
 377                     goto error;
 378                 put_be32(pb[0], 12);
 379                 put_tag (pb[0], "jP  ");
 380                 put_be32(pb[0], 0x0D0A870A); // signature
 381                 put_be32(pb[0], 20);
 382                 put_tag (pb[0], "ftyp");
 383                 put_tag (pb[0], "jp2 ");
 384                 put_be32(pb[0], 0);
 385                 put_tag (pb[0], "jp2 ");
 386                 put_buffer(pb[0], st->codec->extradata, st->codec->extradata_size);
 387             }else if(pkt->size < 8 ||
 388                      (!st->codec->extradata_size &&
 389                       AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
 390             error:
 391                 av_log(s, AV_LOG_ERROR, "malformated jpeg2000 codestream\n");
 392                 return -1;
 393             }
 394         }
 395         put_buffer(pb[0], pkt->data, pkt->size);
 396     }
 397     put_flush_packet(pb[0]);
 398     if (!img->is_pipe) {
 399         url_fclose(pb[0]);
 400     }
 401
 402     img->img_number++;
 403     return 0;
 404 }
 405
 406 #endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
 407
 408 /* input */
 409 #if CONFIG_IMAGE2_DEMUXER
 410 AVInputFormat image2_demuxer = {
 411     "image2",
 412     NULL_IF_CONFIG_SMALL("image2 sequence"),
 413     sizeof(VideoData),
 414     image_probe,
 415     img_read_header,
 416     img_read_packet,
 417     NULL,
 418     NULL,
 419     NULL,
 420     AVFMT_NOFILE,
 421 };
 422 #endif
 423 #if CONFIG_IMAGE2PIPE_DEMUXER
 424 AVInputFormat image2pipe_demuxer = {
 425     "image2pipe",
 426     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 427     sizeof(VideoData),
 428     NULL, /* no probe */
 429     img_read_header,
 430     img_read_packet,
 431 };
 432 #endif
 433
 434 /* output */
 435 #if CONFIG_IMAGE2_MUXER
 436 AVOutputFormat image2_muxer = {
 437     "image2",
 438     NULL_IF_CONFIG_SMALL("image2 sequence"),
 439     "",
 440     "bmp,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,ppm,sgi,tif,tiff,jp2",
 441     sizeof(VideoData),
 442     CODEC_ID_NONE,
 443     CODEC_ID_MJPEG,
 444     img_write_header,
 445     img_write_packet,
 446     NULL,
 447     .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
 448 };
 449 #endif
 450 #if CONFIG_IMAGE2PIPE_MUXER
 451 AVOutputFormat image2pipe_muxer = {
 452     "image2pipe",
 453     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 454     "",
 455     "",
 456     sizeof(VideoData),
 457     CODEC_ID_NONE,
 458     CODEC_ID_MJPEG,
 459     img_write_header,
 460     img_write_packet,
 461     .flags= AVFMT_NOTIMESTAMPS
 462 };
 463 #endif