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 (av_filename_number_test(p->filename) && av_str2id(img_tags, p->filename))
 158         return AVPROBE_SCORE_MAX;
 159     else
 160         return 0;
 161 }
 162
 163 enum CodecID av_guess_image2_codec(const char *filename){
 164     return av_str2id(img_tags, filename);
 165 }
 166
 167 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 168 {
 169     VideoData *s = s1->priv_data;
 170     int first_index, last_index;
 171     AVStream *st;
 172
 173     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 174
 175     st = av_new_stream(s1, 0);
 176     if (!st) {
 177         return -ENOMEM;
 178     }
 179
 180     pstrcpy(s->path, sizeof(s->path), s1->filename);
 181     s->img_number = 0;
 182     s->img_count = 0;
 183
 184     /* find format */
 185     if (s1->iformat->flags & AVFMT_NOFILE)
 186         s->is_pipe = 0;
 187     else{
 188         s->is_pipe = 1;
 189         st->need_parsing= 1;
 190     }
 191
 192     if (!ap->time_base.num) {
 193         av_set_pts_info(st, 60, 1, 25);
 194     } else {
 195         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 196     }
 197
 198     if(ap->width && ap->height){
 199         st->codec->width = ap->width;
 200         st->codec->height= ap->height;
 201     }
 202
 203     if (!s->is_pipe) {
 204         if (find_image_range(&first_index, &last_index, s->path) < 0)
 205             return AVERROR_IO;
 206         s->img_first = first_index;
 207         s->img_last = last_index;
 208         s->img_number = first_index;
 209         /* compute duration */
 210         st->start_time = 0;
 211         st->duration = last_index - first_index + 1;
 212     }
 213
 214     if(ap->video_codec_id){
 215         st->codec->codec_type = CODEC_TYPE_VIDEO;
 216         st->codec->codec_id = ap->video_codec_id;
 217     }else if(ap->audio_codec_id){
 218         st->codec->codec_type = CODEC_TYPE_AUDIO;
 219         st->codec->codec_id = ap->audio_codec_id;
 220     }else{
 221         st->codec->codec_type = CODEC_TYPE_VIDEO;
 222         st->codec->codec_id = av_str2id(img_tags, s->path);
 223     }
 224     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 225         st->codec->pix_fmt = ap->pix_fmt;
 226
 227     return 0;
 228 }
 229
 230 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 231 {
 232     VideoData *s = s1->priv_data;
 233     char filename[1024];
 234     int i;
 235     int size[3]={0}, ret[3]={0};
 236     ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]};
 237     AVCodecContext *codec= s1->streams[0]->codec;
 238
 239     if (!s->is_pipe) {
 240         /* loop over input */
 241         if (s1->loop_input && s->img_number > s->img_last) {
 242             s->img_number = s->img_first;
 243         }
 244         if (av_get_frame_filename(filename, sizeof(filename),
 245                                   s->path, s->img_number)<0 && s->img_number > 1)
 246             return AVERROR_IO;
 247         for(i=0; i<3; i++){
 248             if (url_fopen(f[i], filename, URL_RDONLY) < 0)
 249                 return AVERROR_IO;
 250             size[i]= url_fsize(f[i]);
 251
 252             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 253                 break;
 254             filename[ strlen(filename) - 1 ]= 'U' + i;
 255         }
 256
 257         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 258             infer_size(&codec->width, &codec->height, size[0]);
 259     } else {
 260         f[0] = &s1->pb;
 261         if (url_feof(f[0]))
 262             return AVERROR_IO;
 263         size[0]= 4096;
 264     }
 265
 266     av_new_packet(pkt, size[0] + size[1] + size[2]);
 267     pkt->stream_index = 0;
 268     pkt->flags |= PKT_FLAG_KEY;
 269
 270     pkt->size= 0;
 271     for(i=0; i<3; i++){
 272         if(size[i]){
 273             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 274             if (!s->is_pipe)
 275                 url_fclose(f[i]);
 276             if(ret[i]>0)
 277                 pkt->size += ret[i];
 278         }
 279     }
 280
 281     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 282         av_free_packet(pkt);
 283         return AVERROR_IO; /* signal EOF */
 284     } else {
 285         s->img_count++;
 286         s->img_number++;
 287         return 0;
 288     }
 289 }
 290
 291 static int img_read_close(AVFormatContext *s1)
 292 {
 293     return 0;
 294 }
 295
 296 #ifdef CONFIG_MUXERS
 297 /******************************************************/
 298 /* image output */
 299
 300 static int img_write_header(AVFormatContext *s)
 301 {
 302     VideoData *img = s->priv_data;
 303
 304     img->img_number = 1;
 305     pstrcpy(img->path, sizeof(img->path), s->filename);
 306
 307     /* find format */
 308     if (s->oformat->flags & AVFMT_NOFILE)
 309         img->is_pipe = 0;
 310     else
 311         img->is_pipe = 1;
 312
 313     return 0;
 314 }
 315
 316 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 317 {
 318     VideoData *img = s->priv_data;
 319     ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]};
 320     char filename[1024];
 321     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 322     int i;
 323
 324     if (!img->is_pipe) {
 325         if (av_get_frame_filename(filename, sizeof(filename),
 326                                   img->path, img->img_number) < 0 && img->img_number>1)
 327             return AVERROR_IO;
 328         for(i=0; i<3; i++){
 329             if (url_fopen(pb[i], filename, URL_WRONLY) < 0)
 330                 return AVERROR_IO;
 331
 332             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 333                 break;
 334             filename[ strlen(filename) - 1 ]= 'U' + i;
 335         }
 336     } else {
 337         pb[0] = &s->pb;
 338     }
 339
 340     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 341         int ysize = codec->width * codec->height;
 342         put_buffer(pb[0], pkt->data        , ysize);
 343         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 344         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 345         put_flush_packet(pb[1]);
 346         put_flush_packet(pb[2]);
 347         url_fclose(pb[1]);
 348         url_fclose(pb[2]);
 349     }else{
 350         put_buffer(pb[0], pkt->data, pkt->size);
 351     }
 352     put_flush_packet(pb[0]);
 353     if (!img->is_pipe) {
 354         url_fclose(pb[0]);
 355     }
 356
 357     img->img_number++;
 358     return 0;
 359 }
 360
 361 static int img_write_trailer(AVFormatContext *s)
 362 {
 363     return 0;
 364 }
 365
 366 #endif /* CONFIG_MUXERS */
 367
 368 /* input */
 369 #ifdef CONFIG_IMAGE2_DEMUXER
 370 AVInputFormat image2_demuxer = {
 371     "image2",
 372     "image2 sequence",
 373     sizeof(VideoData),
 374     image_probe,
 375     img_read_header,
 376     img_read_packet,
 377     img_read_close,
 378     NULL,
 379     NULL,
 380     AVFMT_NOFILE,
 381 };
 382 #endif
 383 #ifdef CONFIG_IMAGE2PIPE_DEMUXER
 384 AVInputFormat image2pipe_demuxer = {
 385     "image2pipe",
 386     "piped image2 sequence",
 387     sizeof(VideoData),
 388     NULL, /* no probe */
 389     img_read_header,
 390     img_read_packet,
 391     img_read_close,
 392     NULL,
 393 };
 394 #endif
 395
 396 /* output */
 397 #ifdef CONFIG_IMAGE2_MUXER
 398 AVOutputFormat image2_muxer = {
 399     "image2",
 400     "image2 sequence",
 401     "",
 402     "",
 403     sizeof(VideoData),
 404     CODEC_ID_NONE,
 405     CODEC_ID_MJPEG,
 406     img_write_header,
 407     img_write_packet,
 408     img_write_trailer,
 409     AVFMT_NOFILE,
 410 };
 411 #endif
 412 #ifdef CONFIG_IMAGE2PIPE_MUXER
 413 AVOutputFormat image2pipe_muxer = {
 414     "image2pipe",
 415     "piped image2 sequence",
 416     "",
 417     "",
 418     sizeof(VideoData),
 419     CODEC_ID_NONE,
 420     CODEC_ID_MJPEG,
 421     img_write_header,
 422     img_write_packet,
 423     img_write_trailer,
 424 };
 425 #endif