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
  24 typedef struct {
  25     int img_first;
  26     int img_last;
  27     int img_number;
  28     int img_count;
  29     int is_pipe;
  30     char path[1024];
  31 } VideoData;
  32
  33 typedef struct {
  34     enum CodecID id;
  35     const char *str;
  36 } IdStrMap;
  37
  38 static const IdStrMap img_tags[] = {
  39     { CODEC_ID_MJPEG     , "jpeg"},
  40     { CODEC_ID_MJPEG     , "jpg"},
  41     { CODEC_ID_LJPEG     , "ljpg"},
  42     { CODEC_ID_PNG       , "png"},
  43     { CODEC_ID_PPM       , "ppm"},
  44     { CODEC_ID_PGM       , "pgm"},
  45     { CODEC_ID_PGMYUV    , "pgmyuv"},
  46     { CODEC_ID_PBM       , "pbm"},
  47     { CODEC_ID_PAM       , "pam"},
  48     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
  49     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
  50     { CODEC_ID_MPEG4     , "mpg4-img"},
  51     { CODEC_ID_FFV1      , "ffv1-img"},
  52     { CODEC_ID_RAWVIDEO  , "y"},
  53     { CODEC_ID_BMP       , "bmp"},
  54     { CODEC_ID_GIF       , "gif"},
  55     { CODEC_ID_TARGA     , "tga"},
  56     { CODEC_ID_TIFF      , "tiff"},
  57     {0, NULL}
  58 };
  59
  60 static int sizes[][2] = {
  61     { 640, 480 },
  62     { 720, 480 },
  63     { 720, 576 },
  64     { 352, 288 },
  65     { 352, 240 },
  66     { 160, 128 },
  67     { 512, 384 },
  68     { 640, 352 },
  69     { 640, 240 },
  70 };
  71
  72 static int infer_size(int *width_ptr, int *height_ptr, int size)
  73 {
  74     int i;
  75
  76     for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
  77         if ((sizes[i][0] * sizes[i][1]) == size) {
  78             *width_ptr = sizes[i][0];
  79             *height_ptr = sizes[i][1];
  80             return 0;
  81         }
  82     }
  83     return -1;
  84 }
  85 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
  86 {
  87     str= strrchr(str, '.');
  88     if(!str) return CODEC_ID_NONE;
  89     str++;
  90
  91     while (tags->id) {
  92         int i;
  93         for(i=0; toupper(tags->str[i]) == toupper(str[i]); i++){
  94             if(tags->str[i]==0 && str[i]==0)
  95                 return tags->id;
  96         }
  97
  98         tags++;
  99     }
 100     return CODEC_ID_NONE;
 101 }
 102
 103 /* return -1 if no image found */
 104 static int find_image_range(int *pfirst_index, int *plast_index,
 105                             const char *path)
 106 {
 107     char buf[1024];
 108     int range, last_index, range1, first_index;
 109
 110     /* find the first image */
 111     for(first_index = 0; first_index < 5; first_index++) {
 112         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 113             *pfirst_index =
 114             *plast_index = 1;
 115             return 0;
 116         }
 117         if (url_exist(buf))
 118             break;
 119     }
 120     if (first_index == 5)
 121         goto fail;
 122
 123     /* find the last image */
 124     last_index = first_index;
 125     for(;;) {
 126         range = 0;
 127         for(;;) {
 128             if (!range)
 129                 range1 = 1;
 130             else
 131                 range1 = 2 * range;
 132             if (av_get_frame_filename(buf, sizeof(buf), path,
 133                                       last_index + range1) < 0)
 134                 goto fail;
 135             if (!url_exist(buf))
 136                 break;
 137             range = range1;
 138             /* just in case... */
 139             if (range >= (1 << 30))
 140                 goto fail;
 141         }
 142         /* we are sure than image last_index + range exists */
 143         if (!range)
 144             break;
 145         last_index += range;
 146     }
 147     *pfirst_index = first_index;
 148     *plast_index = last_index;
 149     return 0;
 150  fail:
 151     return -1;
 152 }
 153
 154
 155 static int image_probe(AVProbeData *p)
 156 {
 157     if (p->filename && av_str2id(img_tags, p->filename)) {
 158         if (av_filename_number_test(p->filename))
 159             return AVPROBE_SCORE_MAX;
 160         else
 161             return AVPROBE_SCORE_MAX/2;
 162     }
 163     return 0;
 164 }
 165
 166 enum CodecID av_guess_image2_codec(const char *filename){
 167     return av_str2id(img_tags, filename);
 168 }
 169
 170 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 171 {
 172     VideoData *s = s1->priv_data;
 173     int first_index, last_index;
 174     AVStream *st;
 175
 176     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 177
 178     st = av_new_stream(s1, 0);
 179     if (!st) {
 180         return -ENOMEM;
 181     }
 182
 183     pstrcpy(s->path, sizeof(s->path), s1->filename);
 184     s->img_number = 0;
 185     s->img_count = 0;
 186
 187     /* find format */
 188     if (s1->iformat->flags & AVFMT_NOFILE)
 189         s->is_pipe = 0;
 190     else{
 191         s->is_pipe = 1;
 192         st->need_parsing= 1;
 193     }
 194
 195     if (!ap->time_base.num) {
 196         av_set_pts_info(st, 60, 1, 25);
 197     } else {
 198         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 199     }
 200
 201     if(ap->width && ap->height){
 202         st->codec->width = ap->width;
 203         st->codec->height= ap->height;
 204     }
 205
 206     if (!s->is_pipe) {
 207         if (find_image_range(&first_index, &last_index, s->path) < 0)
 208             return AVERROR_IO;
 209         s->img_first = first_index;
 210         s->img_last = last_index;
 211         s->img_number = first_index;
 212         /* compute duration */
 213         st->start_time = 0;
 214         st->duration = last_index - first_index + 1;
 215     }
 216
 217     if(ap->video_codec_id){
 218         st->codec->codec_type = CODEC_TYPE_VIDEO;
 219         st->codec->codec_id = ap->video_codec_id;
 220     }else if(ap->audio_codec_id){
 221         st->codec->codec_type = CODEC_TYPE_AUDIO;
 222         st->codec->codec_id = ap->audio_codec_id;
 223     }else{
 224         st->codec->codec_type = CODEC_TYPE_VIDEO;
 225         st->codec->codec_id = av_str2id(img_tags, s->path);
 226     }
 227     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 228         st->codec->pix_fmt = ap->pix_fmt;
 229
 230     return 0;
 231 }
 232
 233 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 234 {
 235     VideoData *s = s1->priv_data;
 236     char filename[1024];
 237     int i;
 238     int size[3]={0}, ret[3]={0};
 239     ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]};
 240     AVCodecContext *codec= s1->streams[0]->codec;
 241
 242     if (!s->is_pipe) {
 243         /* loop over input */
 244         if (s1->loop_input && s->img_number > s->img_last) {
 245             s->img_number = s->img_first;
 246         }
 247         if (av_get_frame_filename(filename, sizeof(filename),
 248                                   s->path, s->img_number)<0 && s->img_number > 1)
 249             return AVERROR_IO;
 250         for(i=0; i<3; i++){
 251             if (url_fopen(f[i], filename, URL_RDONLY) < 0)
 252                 return AVERROR_IO;
 253             size[i]= url_fsize(f[i]);
 254
 255             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 256                 break;
 257             filename[ strlen(filename) - 1 ]= 'U' + i;
 258         }
 259
 260         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 261             infer_size(&codec->width, &codec->height, size[0]);
 262     } else {
 263         f[0] = &s1->pb;
 264         if (url_feof(f[0]))
 265             return AVERROR_IO;
 266         size[0]= 4096;
 267     }
 268
 269     av_new_packet(pkt, size[0] + size[1] + size[2]);
 270     pkt->stream_index = 0;
 271     pkt->flags |= PKT_FLAG_KEY;
 272
 273     pkt->size= 0;
 274     for(i=0; i<3; i++){
 275         if(size[i]){
 276             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 277             if (!s->is_pipe)
 278                 url_fclose(f[i]);
 279             if(ret[i]>0)
 280                 pkt->size += ret[i];
 281         }
 282     }
 283
 284     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 285         av_free_packet(pkt);
 286         return AVERROR_IO; /* signal EOF */
 287     } else {
 288         s->img_count++;
 289         s->img_number++;
 290         return 0;
 291     }
 292 }
 293
 294 static int img_read_close(AVFormatContext *s1)
 295 {
 296     return 0;
 297 }
 298
 299 #ifdef CONFIG_MUXERS
 300 /******************************************************/
 301 /* image output */
 302
 303 static int img_write_header(AVFormatContext *s)
 304 {
 305     VideoData *img = s->priv_data;
 306
 307     img->img_number = 1;
 308     pstrcpy(img->path, sizeof(img->path), s->filename);
 309
 310     /* find format */
 311     if (s->oformat->flags & AVFMT_NOFILE)
 312         img->is_pipe = 0;
 313     else
 314         img->is_pipe = 1;
 315
 316     return 0;
 317 }
 318
 319 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 320 {
 321     VideoData *img = s->priv_data;
 322     ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]};
 323     char filename[1024];
 324     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 325     int i;
 326
 327     if (!img->is_pipe) {
 328         if (av_get_frame_filename(filename, sizeof(filename),
 329                                   img->path, img->img_number) < 0 && img->img_number>1)
 330             return AVERROR_IO;
 331         for(i=0; i<3; i++){
 332             if (url_fopen(pb[i], filename, URL_WRONLY) < 0)
 333                 return AVERROR_IO;
 334
 335             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 336                 break;
 337             filename[ strlen(filename) - 1 ]= 'U' + i;
 338         }
 339     } else {
 340         pb[0] = &s->pb;
 341     }
 342
 343     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 344         int ysize = codec->width * codec->height;
 345         put_buffer(pb[0], pkt->data        , ysize);
 346         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 347         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 348         put_flush_packet(pb[1]);
 349         put_flush_packet(pb[2]);
 350         url_fclose(pb[1]);
 351         url_fclose(pb[2]);
 352     }else{
 353         put_buffer(pb[0], pkt->data, pkt->size);
 354     }
 355     put_flush_packet(pb[0]);
 356     if (!img->is_pipe) {
 357         url_fclose(pb[0]);
 358     }
 359
 360     img->img_number++;
 361     return 0;
 362 }
 363
 364 static int img_write_trailer(AVFormatContext *s)
 365 {
 366     return 0;
 367 }
 368
 369 #endif /* CONFIG_MUXERS */
 370
 371 /* input */
 372 #ifdef CONFIG_IMAGE2_DEMUXER
 373 AVInputFormat image2_demuxer = {
 374     "image2",
 375     "image2 sequence",
 376     sizeof(VideoData),
 377     image_probe,
 378     img_read_header,
 379     img_read_packet,
 380     img_read_close,
 381     NULL,
 382     NULL,
 383     AVFMT_NOFILE,
 384 };
 385 #endif
 386 #ifdef CONFIG_IMAGE2PIPE_DEMUXER
 387 AVInputFormat image2pipe_demuxer = {
 388     "image2pipe",
 389     "piped image2 sequence",
 390     sizeof(VideoData),
 391     NULL, /* no probe */
 392     img_read_header,
 393     img_read_packet,
 394     img_read_close,
 395     NULL,
 396 };
 397 #endif
 398
 399 /* output */
 400 #ifdef CONFIG_IMAGE2_MUXER
 401 AVOutputFormat image2_muxer = {
 402     "image2",
 403     "image2 sequence",
 404     "",
 405     "",
 406     sizeof(VideoData),
 407     CODEC_ID_NONE,
 408     CODEC_ID_MJPEG,
 409     img_write_header,
 410     img_write_packet,
 411     img_write_trailer,
 412     AVFMT_NOFILE,
 413 };
 414 #endif
 415 #ifdef CONFIG_IMAGE2PIPE_MUXER
 416 AVOutputFormat image2pipe_muxer = {
 417     "image2pipe",
 418     "piped image2 sequence",
 419     "",
 420     "",
 421     sizeof(VideoData),
 422     CODEC_ID_NONE,
 423     CODEC_ID_MJPEG,
 424     img_write_header,
 425     img_write_packet,
 426     img_write_trailer,
 427 };
 428 #endif