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