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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20 #include "avformat.h"
  21
  22 /* XXX: this is a hack */
  23 extern int loop_input;
  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     {0, NULL}
  56 };
  57
  58 static int sizes[][2] = {
  59     { 640, 480 },
  60     { 720, 480 },
  61     { 720, 576 },
  62     { 352, 288 },
  63     { 352, 240 },
  64     { 160, 128 },
  65     { 512, 384 },
  66     { 640, 352 },
  67     { 640, 240 },
  68 };
  69
  70 static int infer_size(int *width_ptr, int *height_ptr, int size)
  71 {
  72     int i;
  73
  74     for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
  75         if ((sizes[i][0] * sizes[i][1]) == size) {
  76             *width_ptr = sizes[i][0];
  77             *height_ptr = sizes[i][1];
  78             return 0;
  79         }
  80     }
  81     return -1;
  82 }
  83 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
  84 {
  85     str= strrchr(str, '.');
  86     if(!str) return CODEC_ID_NONE;
  87     str++;
  88
  89     while (tags->id) {
  90         int i;
  91         for(i=0; toupper(tags->str[i]) == toupper(str[i]); i++){
  92             if(tags->str[i]==0 && str[i]==0)
  93                 return tags->id;
  94         }
  95
  96         tags++;
  97     }
  98     return CODEC_ID_NONE;
  99 }
 100
 101 /* return -1 if no image found */
 102 static int find_image_range(int *pfirst_index, int *plast_index,
 103                             const char *path)
 104 {
 105     char buf[1024];
 106     int range, last_index, range1, first_index;
 107
 108     /* find the first image */
 109     for(first_index = 0; first_index < 5; first_index++) {
 110         if (get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 111             *pfirst_index =
 112             *plast_index = 1;
 113             return 0;
 114         }
 115         if (url_exist(buf))
 116             break;
 117     }
 118     if (first_index == 5)
 119         goto fail;
 120
 121     /* find the last image */
 122     last_index = first_index;
 123     for(;;) {
 124         range = 0;
 125         for(;;) {
 126             if (!range)
 127                 range1 = 1;
 128             else
 129                 range1 = 2 * range;
 130             if (get_frame_filename(buf, sizeof(buf), path,
 131                                    last_index + range1) < 0)
 132                 goto fail;
 133             if (!url_exist(buf))
 134                 break;
 135             range = range1;
 136             /* just in case... */
 137             if (range >= (1 << 30))
 138                 goto fail;
 139         }
 140         /* we are sure than image last_index + range exists */
 141         if (!range)
 142             break;
 143         last_index += range;
 144     }
 145     *pfirst_index = first_index;
 146     *plast_index = last_index;
 147     return 0;
 148  fail:
 149     return -1;
 150 }
 151
 152
 153 static int image_probe(AVProbeData *p)
 154 {
 155     if (filename_number_test(p->filename) >= 0 && av_str2id(img_tags, p->filename))
 156         return AVPROBE_SCORE_MAX;
 157     else
 158         return 0;
 159 }
 160
 161 enum CodecID av_guess_image2_codec(const char *filename){
 162     return av_str2id(img_tags, filename);
 163 }
 164
 165 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 166 {
 167     VideoData *s = s1->priv_data;
 168     int first_index, last_index;
 169     AVStream *st;
 170
 171     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 172
 173     st = av_new_stream(s1, 0);
 174     if (!st) {
 175         return -ENOMEM;
 176     }
 177
 178     pstrcpy(s->path, sizeof(s->path), s1->filename);
 179     s->img_number = 0;
 180     s->img_count = 0;
 181
 182     /* find format */
 183     if (s1->iformat->flags & AVFMT_NOFILE)
 184         s->is_pipe = 0;
 185     else{
 186         s->is_pipe = 1;
 187         st->need_parsing= 1;
 188     }
 189
 190     if (!ap->time_base.num) {
 191         av_set_pts_info(st, 60, 1, 25);
 192     } else {
 193         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 194     }
 195
 196     if(ap->width && ap->height){
 197         st->codec->width = ap->width;
 198         st->codec->height= ap->height;
 199     }
 200
 201     if (!s->is_pipe) {
 202         if (find_image_range(&first_index, &last_index, s->path) < 0)
 203             return AVERROR_IO;
 204         s->img_first = first_index;
 205         s->img_last = last_index;
 206         s->img_number = first_index;
 207         /* compute duration */
 208         st->start_time = 0;
 209         st->duration = last_index - first_index + 1;
 210     }
 211
 212     if(ap->video_codec_id){
 213         st->codec->codec_type = CODEC_TYPE_VIDEO;
 214         st->codec->codec_id = ap->video_codec_id;
 215     }else if(ap->audio_codec_id){
 216         st->codec->codec_type = CODEC_TYPE_AUDIO;
 217         st->codec->codec_id = ap->audio_codec_id;
 218     }else{
 219         st->codec->codec_type = CODEC_TYPE_VIDEO;
 220         st->codec->codec_id = av_str2id(img_tags, s->path);
 221     }
 222     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 223         st->codec->pix_fmt = ap->pix_fmt;
 224
 225     return 0;
 226 }
 227
 228 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 229 {
 230     VideoData *s = s1->priv_data;
 231     char filename[1024];
 232     int i;
 233     int size[3]={0}, ret[3]={0};
 234     ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]};
 235     AVCodecContext *codec= s1->streams[0]->codec;
 236
 237     if (!s->is_pipe) {
 238         /* loop over input */
 239         if (loop_input && s->img_number > s->img_last) {
 240             s->img_number = s->img_first;
 241         }
 242         if (get_frame_filename(filename, sizeof(filename),
 243                                s->path, s->img_number)<0 && s->img_number > 1)
 244             return AVERROR_IO;
 245         for(i=0; i<3; i++){
 246             if (url_fopen(f[i], filename, URL_RDONLY) < 0)
 247                 return AVERROR_IO;
 248             size[i]= url_fsize(f[i]);
 249
 250             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 251                 break;
 252             filename[ strlen(filename) - 1 ]= 'U' + i;
 253         }
 254
 255         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 256             infer_size(&codec->width, &codec->height, size[0]);
 257     } else {
 258         f[0] = &s1->pb;
 259         if (url_feof(f[0]))
 260             return AVERROR_IO;
 261         size[0]= 4096;
 262     }
 263
 264     av_new_packet(pkt, size[0] + size[1] + size[2]);
 265     pkt->stream_index = 0;
 266     pkt->flags |= PKT_FLAG_KEY;
 267
 268     pkt->size= 0;
 269     for(i=0; i<3; i++){
 270         if(size[i]){
 271             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 272             if (!s->is_pipe)
 273                 url_fclose(f[i]);
 274             if(ret[i]>0)
 275                 pkt->size += ret[i];
 276         }
 277     }
 278
 279     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 280         av_free_packet(pkt);
 281         return AVERROR_IO; /* signal EOF */
 282     } else {
 283         s->img_count++;
 284         s->img_number++;
 285         return 0;
 286     }
 287 }
 288
 289 static int img_read_close(AVFormatContext *s1)
 290 {
 291     return 0;
 292 }
 293
 294 #ifdef CONFIG_MUXERS
 295 /******************************************************/
 296 /* image output */
 297
 298 static int img_write_header(AVFormatContext *s)
 299 {
 300     VideoData *img = s->priv_data;
 301
 302     img->img_number = 1;
 303     pstrcpy(img->path, sizeof(img->path), s->filename);
 304
 305     /* find format */
 306     if (s->oformat->flags & AVFMT_NOFILE)
 307         img->is_pipe = 0;
 308     else
 309         img->is_pipe = 1;
 310
 311     return 0;
 312 }
 313
 314 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 315 {
 316     VideoData *img = s->priv_data;
 317     ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]};
 318     char filename[1024];
 319     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 320     int i;
 321
 322     if (!img->is_pipe) {
 323         if (get_frame_filename(filename, sizeof(filename),
 324                                img->path, img->img_number) < 0 && img->img_number>1)
 325             return AVERROR_IO;
 326         for(i=0; i<3; i++){
 327             if (url_fopen(pb[i], filename, URL_WRONLY) < 0)
 328                 return AVERROR_IO;
 329
 330             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 331                 break;
 332             filename[ strlen(filename) - 1 ]= 'U' + i;
 333         }
 334     } else {
 335         pb[0] = &s->pb;
 336     }
 337
 338     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 339         int ysize = codec->width * codec->height;
 340         put_buffer(pb[0], pkt->data        , ysize);
 341         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 342         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 343         put_flush_packet(pb[1]);
 344         put_flush_packet(pb[2]);
 345         url_fclose(pb[1]);
 346         url_fclose(pb[2]);
 347     }else{
 348         put_buffer(pb[0], pkt->data, pkt->size);
 349     }
 350     put_flush_packet(pb[0]);
 351     if (!img->is_pipe) {
 352         url_fclose(pb[0]);
 353     }
 354
 355     img->img_number++;
 356     return 0;
 357 }
 358
 359 static int img_write_trailer(AVFormatContext *s)
 360 {
 361     return 0;
 362 }
 363
 364 #endif /* CONFIG_MUXERS */
 365
 366 /* input */
 367
 368 static AVInputFormat image2_iformat = {
 369     "image2",
 370     "image2 sequence",
 371     sizeof(VideoData),
 372     image_probe,
 373     img_read_header,
 374     img_read_packet,
 375     img_read_close,
 376     NULL,
 377     NULL,
 378     AVFMT_NOFILE,
 379 };
 380
 381 static AVInputFormat image2pipe_iformat = {
 382     "image2pipe",
 383     "piped image2 sequence",
 384     sizeof(VideoData),
 385     NULL, /* no probe */
 386     img_read_header,
 387     img_read_packet,
 388     img_read_close,
 389     NULL,
 390 };
 391
 392
 393 #ifdef CONFIG_MUXERS
 394 /* output */
 395
 396 static AVOutputFormat image2_oformat = {
 397     "image2",
 398     "image2 sequence",
 399     "",
 400     "",
 401     sizeof(VideoData),
 402     CODEC_ID_NONE,
 403     CODEC_ID_MJPEG,
 404     img_write_header,
 405     img_write_packet,
 406     img_write_trailer,
 407     AVFMT_NOFILE,
 408 };
 409
 410 static AVOutputFormat image2pipe_oformat = {
 411     "image2pipe",
 412     "piped image2 sequence",
 413     "",
 414     "",
 415     sizeof(VideoData),
 416     CODEC_ID_NONE,
 417     CODEC_ID_MJPEG,
 418     img_write_header,
 419     img_write_packet,
 420     img_write_trailer,
 421 };
 422 #endif /* CONFIG_MUXERS */
 423
 424 int img2_init(void)
 425 {
 426     av_register_input_format(&image2_iformat);
 427     av_register_input_format(&image2pipe_iformat);
 428
 429 #ifdef CONFIG_MUXERS
 430     av_register_output_format(&image2_oformat);
 431     av_register_output_format(&image2pipe_oformat);
 432 #endif
 433
 434     return 0;
 435 }