git.sesse.net Git - ffmpeg/blob - 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 #include "avformat.h"
  23 #include "avstring.h"
  24
  25 typedef struct {
  26     int img_first;
  27     int img_last;
  28     int img_number;
  29     int img_count;
  30     int is_pipe;
  31     char path[1024];
  32 } VideoData;
  33
  34 typedef struct {
  35     enum CodecID id;
  36     const char *str;
  37 } IdStrMap;
  38
  39 static const IdStrMap img_tags[] = {
  40     { CODEC_ID_MJPEG     , "jpeg"},
  41     { CODEC_ID_MJPEG     , "jpg"},
  42     { CODEC_ID_LJPEG     , "ljpg"},
  43     { CODEC_ID_PNG       , "png"},
  44     { CODEC_ID_PPM       , "ppm"},
  45     { CODEC_ID_PGM       , "pgm"},
  46     { CODEC_ID_PGMYUV    , "pgmyuv"},
  47     { CODEC_ID_PBM       , "pbm"},
  48     { CODEC_ID_PAM       , "pam"},
  49     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
  50     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
  51     { CODEC_ID_MPEG4     , "mpg4-img"},
  52     { CODEC_ID_FFV1      , "ffv1-img"},
  53     { CODEC_ID_RAWVIDEO  , "y"},
  54     { CODEC_ID_BMP       , "bmp"},
  55     { CODEC_ID_GIF       , "gif"},
  56     { CODEC_ID_TARGA     , "tga"},
  57     { CODEC_ID_TIFF      , "tiff"},
  58     { CODEC_ID_SGI       , "sgi"},
  59     { CODEC_ID_PTX       , "ptx"},
  60     {0, NULL}
  61 };
  62
  63 static int sizes[][2] = {
  64     { 640, 480 },
  65     { 720, 480 },
  66     { 720, 576 },
  67     { 352, 288 },
  68     { 352, 240 },
  69     { 160, 128 },
  70     { 512, 384 },
  71     { 640, 352 },
  72     { 640, 240 },
  73 };
  74
  75 static int infer_size(int *width_ptr, int *height_ptr, int size)
  76 {
  77     int i;
  78
  79     for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
  80         if ((sizes[i][0] * sizes[i][1]) == size) {
  81             *width_ptr = sizes[i][0];
  82             *height_ptr = sizes[i][1];
  83             return 0;
  84         }
  85     }
  86     return -1;
  87 }
  88 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
  89 {
  90     str= strrchr(str, '.');
  91     if(!str) return CODEC_ID_NONE;
  92     str++;
  93
  94     while (tags->id) {
  95         int i;
  96         for(i=0; toupper(tags->str[i]) == toupper(str[i]); i++){
  97             if(tags->str[i]==0 && str[i]==0)
  98                 return tags->id;
  99         }
 100
 101         tags++;
 102     }
 103     return CODEC_ID_NONE;
 104 }
 105
 106 /* return -1 if no image found */
 107 static int find_image_range(int *pfirst_index, int *plast_index,
 108                             const char *path)
 109 {
 110     char buf[1024];
 111     int range, last_index, range1, first_index;
 112
 113     /* find the first image */
 114     for(first_index = 0; first_index < 5; first_index++) {
 115         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 116             *pfirst_index =
 117             *plast_index = 1;
 118             return 0;
 119         }
 120         if (url_exist(buf))
 121             break;
 122     }
 123     if (first_index == 5)
 124         goto fail;
 125
 126     /* find the last image */
 127     last_index = first_index;
 128     for(;;) {
 129         range = 0;
 130         for(;;) {
 131             if (!range)
 132                 range1 = 1;
 133             else
 134                 range1 = 2 * range;
 135             if (av_get_frame_filename(buf, sizeof(buf), path,
 136                                       last_index + range1) < 0)
 137                 goto fail;
 138             if (!url_exist(buf))
 139                 break;
 140             range = range1;
 141             /* just in case... */
 142             if (range >= (1 << 30))
 143                 goto fail;
 144         }
 145         /* we are sure than image last_index + range exists */
 146         if (!range)
 147             break;
 148         last_index += range;
 149     }
 150     *pfirst_index = first_index;
 151     *plast_index = last_index;
 152     return 0;
 153  fail:
 154     return -1;
 155 }
 156
 157
 158 static int image_probe(AVProbeData *p)
 159 {
 160     if (p->filename && av_str2id(img_tags, p->filename)) {
 161         if (av_filename_number_test(p->filename))
 162             return AVPROBE_SCORE_MAX;
 163         else
 164             return AVPROBE_SCORE_MAX/2;
 165     }
 166     return 0;
 167 }
 168
 169 enum CodecID av_guess_image2_codec(const char *filename){
 170     return av_str2id(img_tags, filename);
 171 }
 172
 173 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 174 {
 175     VideoData *s = s1->priv_data;
 176     int first_index, last_index;
 177     AVStream *st;
 178
 179     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 180
 181     st = av_new_stream(s1, 0);
 182     if (!st) {
 183         return AVERROR(ENOMEM);
 184     }
 185
 186     av_strlcpy(s->path, s1->filename, sizeof(s->path));
 187     s->img_number = 0;
 188     s->img_count = 0;
 189
 190     /* find format */
 191     if (s1->iformat->flags & AVFMT_NOFILE)
 192         s->is_pipe = 0;
 193     else{
 194         s->is_pipe = 1;
 195         st->need_parsing = AVSTREAM_PARSE_FULL;
 196     }
 197
 198     if (!ap->time_base.num) {
 199         av_set_pts_info(st, 60, 1, 25);
 200     } else {
 201         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 202     }
 203
 204     if(ap->width && ap->height){
 205         st->codec->width = ap->width;
 206         st->codec->height= ap->height;
 207     }
 208
 209     if (!s->is_pipe) {
 210         if (find_image_range(&first_index, &last_index, s->path) < 0)
 211             return AVERROR(EIO);
 212         s->img_first = first_index;
 213         s->img_last = last_index;
 214         s->img_number = first_index;
 215         /* compute duration */
 216         st->start_time = 0;
 217         st->duration = last_index - first_index + 1;
 218     }
 219
 220     if(ap->video_codec_id){
 221         st->codec->codec_type = CODEC_TYPE_VIDEO;
 222         st->codec->codec_id = ap->video_codec_id;
 223     }else if(ap->audio_codec_id){
 224         st->codec->codec_type = CODEC_TYPE_AUDIO;
 225         st->codec->codec_id = ap->audio_codec_id;
 226     }else{
 227         st->codec->codec_type = CODEC_TYPE_VIDEO;
 228         st->codec->codec_id = av_str2id(img_tags, s->path);
 229     }
 230     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 231         st->codec->pix_fmt = ap->pix_fmt;
 232
 233     return 0;
 234 }
 235
 236 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 237 {
 238     VideoData *s = s1->priv_data;
 239     char filename[1024];
 240     int i;
 241     int size[3]={0}, ret[3]={0};
 242     ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]};
 243     AVCodecContext *codec= s1->streams[0]->codec;
 244
 245     if (!s->is_pipe) {
 246         /* loop over input */
 247         if (s1->loop_input && s->img_number > s->img_last) {
 248             s->img_number = s->img_first;
 249         }
 250         if (av_get_frame_filename(filename, sizeof(filename),
 251                                   s->path, s->img_number)<0 && s->img_number > 1)
 252             return AVERROR(EIO);
 253         for(i=0; i<3; i++){
 254             if (url_fopen(f[i], filename, URL_RDONLY) < 0)
 255                 return AVERROR(EIO);
 256             size[i]= url_fsize(f[i]);
 257
 258             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 259                 break;
 260             filename[ strlen(filename) - 1 ]= 'U' + i;
 261         }
 262
 263         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 264             infer_size(&codec->width, &codec->height, size[0]);
 265     } else {
 266         f[0] = &s1->pb;
 267         if (url_feof(f[0]))
 268             return AVERROR(EIO);
 269         size[0]= 4096;
 270     }
 271
 272     av_new_packet(pkt, size[0] + size[1] + size[2]);
 273     pkt->stream_index = 0;
 274     pkt->flags |= PKT_FLAG_KEY;
 275
 276     pkt->size= 0;
 277     for(i=0; i<3; i++){
 278         if(size[i]){
 279             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 280             if (!s->is_pipe)
 281                 url_fclose(f[i]);
 282             if(ret[i]>0)
 283                 pkt->size += ret[i];
 284         }
 285     }
 286
 287     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 288         av_free_packet(pkt);
 289         return AVERROR(EIO); /* signal EOF */
 290     } else {
 291         s->img_count++;
 292         s->img_number++;
 293         return 0;
 294     }
 295 }
 296
 297 static int img_read_close(AVFormatContext *s1)
 298 {
 299     return 0;
 300 }
 301
 302 #ifdef CONFIG_MUXERS
 303 /******************************************************/
 304 /* image output */
 305
 306 static int img_write_header(AVFormatContext *s)
 307 {
 308     VideoData *img = s->priv_data;
 309
 310     img->img_number = 1;
 311     av_strlcpy(img->path, s->filename, sizeof(img->path));
 312
 313     /* find format */
 314     if (s->oformat->flags & AVFMT_NOFILE)
 315         img->is_pipe = 0;
 316     else
 317         img->is_pipe = 1;
 318
 319     return 0;
 320 }
 321
 322 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 323 {
 324     VideoData *img = s->priv_data;
 325     ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]};
 326     char filename[1024];
 327     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 328     int i;
 329
 330     if (!img->is_pipe) {
 331         if (av_get_frame_filename(filename, sizeof(filename),
 332                                   img->path, img->img_number) < 0 && img->img_number>1)
 333             return AVERROR(EIO);
 334         for(i=0; i<3; i++){
 335             if (url_fopen(pb[i], filename, URL_WRONLY) < 0)
 336                 return AVERROR(EIO);
 337
 338             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 339                 break;
 340             filename[ strlen(filename) - 1 ]= 'U' + i;
 341         }
 342     } else {
 343         pb[0] = &s->pb;
 344     }
 345
 346     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 347         int ysize = codec->width * codec->height;
 348         put_buffer(pb[0], pkt->data        , ysize);
 349         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 350         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 351         put_flush_packet(pb[1]);
 352         put_flush_packet(pb[2]);
 353         url_fclose(pb[1]);
 354         url_fclose(pb[2]);
 355     }else{
 356         put_buffer(pb[0], pkt->data, pkt->size);
 357     }
 358     put_flush_packet(pb[0]);
 359     if (!img->is_pipe) {
 360         url_fclose(pb[0]);
 361     }
 362
 363     img->img_number++;
 364     return 0;
 365 }
 366
 367 static int img_write_trailer(AVFormatContext *s)
 368 {
 369     return 0;
 370 }
 371
 372 #endif /* CONFIG_MUXERS */
 373
 374 /* input */
 375 #ifdef CONFIG_IMAGE2_DEMUXER
 376 AVInputFormat image2_demuxer = {
 377     "image2",
 378     "image2 sequence",
 379     sizeof(VideoData),
 380     image_probe,
 381     img_read_header,
 382     img_read_packet,
 383     img_read_close,
 384     NULL,
 385     NULL,
 386     AVFMT_NOFILE,
 387 };
 388 #endif
 389 #ifdef CONFIG_IMAGE2PIPE_DEMUXER
 390 AVInputFormat image2pipe_demuxer = {
 391     "image2pipe",
 392     "piped image2 sequence",
 393     sizeof(VideoData),
 394     NULL, /* no probe */
 395     img_read_header,
 396     img_read_packet,
 397     img_read_close,
 398     NULL,
 399 };
 400 #endif
 401
 402 /* output */
 403 #ifdef CONFIG_IMAGE2_MUXER
 404 AVOutputFormat image2_muxer = {
 405     "image2",
 406     "image2 sequence",
 407     "",
 408     "",
 409     sizeof(VideoData),
 410     CODEC_ID_NONE,
 411     CODEC_ID_MJPEG,
 412     img_write_header,
 413     img_write_packet,
 414     img_write_trailer,
 415     AVFMT_NOFILE,
 416 };
 417 #endif
 418 #ifdef CONFIG_IMAGE2PIPE_MUXER
 419 AVOutputFormat image2pipe_muxer = {
 420     "image2pipe",
 421     "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     img_write_trailer,
 430 };
 431 #endif