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
  23 #include "libavutil/avstring.h"
  24 #include "avformat.h"
  25 #include <strings.h>
  26
  27 typedef struct {
  28     int img_first;
  29     int img_last;
  30     int img_number;
  31     int img_count;
  32     int is_pipe;
  33     char path[1024];
  34 } VideoData;
  35
  36 typedef struct {
  37     enum CodecID id;
  38     const char *str;
  39 } IdStrMap;
  40
  41 static const IdStrMap img_tags[] = {
  42     { CODEC_ID_MJPEG     , "jpeg"},
  43     { CODEC_ID_MJPEG     , "jpg"},
  44     { CODEC_ID_LJPEG     , "ljpg"},
  45     { CODEC_ID_PNG       , "png"},
  46     { CODEC_ID_PNG       , "mng"},
  47     { CODEC_ID_PPM       , "ppm"},
  48     { CODEC_ID_PGM       , "pgm"},
  49     { CODEC_ID_PGMYUV    , "pgmyuv"},
  50     { CODEC_ID_PBM       , "pbm"},
  51     { CODEC_ID_PAM       , "pam"},
  52     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
  53     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
  54     { CODEC_ID_MPEG4     , "mpg4-img"},
  55     { CODEC_ID_FFV1      , "ffv1-img"},
  56     { CODEC_ID_RAWVIDEO  , "y"},
  57     { CODEC_ID_BMP       , "bmp"},
  58     { CODEC_ID_GIF       , "gif"},
  59     { CODEC_ID_TARGA     , "tga"},
  60     { CODEC_ID_TIFF      , "tiff"},
  61     { CODEC_ID_TIFF      , "tif"},
  62     { CODEC_ID_SGI       , "sgi"},
  63     { CODEC_ID_PTX       , "ptx"},
  64     { CODEC_ID_PCX       , "pcx"},
  65     { CODEC_ID_SUNRAST   , "sun"},
  66     { CODEC_ID_SUNRAST   , "ras"},
  67     { CODEC_ID_SUNRAST   , "rs"},
  68     { CODEC_ID_SUNRAST   , "im1"},
  69     { CODEC_ID_SUNRAST   , "im8"},
  70     { CODEC_ID_SUNRAST   , "im24"},
  71     { CODEC_ID_SUNRAST   , "sunras"},
  72     { CODEC_ID_NONE      , NULL}
  73 };
  74
  75 static const int sizes[][2] = {
  76     { 640, 480 },
  77     { 720, 480 },
  78     { 720, 576 },
  79     { 352, 288 },
  80     { 352, 240 },
  81     { 160, 128 },
  82     { 512, 384 },
  83     { 640, 352 },
  84     { 640, 240 },
  85 };
  86
  87 static int infer_size(int *width_ptr, int *height_ptr, int size)
  88 {
  89     int i;
  90
  91     for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
  92         if ((sizes[i][0] * sizes[i][1]) == size) {
  93             *width_ptr = sizes[i][0];
  94             *height_ptr = sizes[i][1];
  95             return 0;
  96         }
  97     }
  98     return -1;
  99 }
 100 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
 101 {
 102     str= strrchr(str, '.');
 103     if(!str) return CODEC_ID_NONE;
 104     str++;
 105
 106     while (tags->id) {
 107         if (!strcasecmp(str, tags->str))
 108             return tags->id;
 109
 110         tags++;
 111     }
 112     return CODEC_ID_NONE;
 113 }
 114
 115 /* return -1 if no image found */
 116 static int find_image_range(int *pfirst_index, int *plast_index,
 117                             const char *path)
 118 {
 119     char buf[1024];
 120     int range, last_index, range1, first_index;
 121
 122     /* find the first image */
 123     for(first_index = 0; first_index < 5; first_index++) {
 124         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 125             *pfirst_index =
 126             *plast_index = 1;
 127             return 0;
 128         }
 129         if (url_exist(buf))
 130             break;
 131     }
 132     if (first_index == 5)
 133         goto fail;
 134
 135     /* find the last image */
 136     last_index = first_index;
 137     for(;;) {
 138         range = 0;
 139         for(;;) {
 140             if (!range)
 141                 range1 = 1;
 142             else
 143                 range1 = 2 * range;
 144             if (av_get_frame_filename(buf, sizeof(buf), path,
 145                                       last_index + range1) < 0)
 146                 goto fail;
 147             if (!url_exist(buf))
 148                 break;
 149             range = range1;
 150             /* just in case... */
 151             if (range >= (1 << 30))
 152                 goto fail;
 153         }
 154         /* we are sure than image last_index + range exists */
 155         if (!range)
 156             break;
 157         last_index += range;
 158     }
 159     *pfirst_index = first_index;
 160     *plast_index = last_index;
 161     return 0;
 162  fail:
 163     return -1;
 164 }
 165
 166
 167 static int image_probe(AVProbeData *p)
 168 {
 169     if (p->filename && av_str2id(img_tags, p->filename)) {
 170         if (av_filename_number_test(p->filename))
 171             return AVPROBE_SCORE_MAX;
 172         else
 173             return AVPROBE_SCORE_MAX/2;
 174     }
 175     return 0;
 176 }
 177
 178 enum CodecID av_guess_image2_codec(const char *filename){
 179     return av_str2id(img_tags, filename);
 180 }
 181
 182 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 183 {
 184     VideoData *s = s1->priv_data;
 185     int first_index, last_index;
 186     AVStream *st;
 187
 188     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 189
 190     st = av_new_stream(s1, 0);
 191     if (!st) {
 192         return AVERROR(ENOMEM);
 193     }
 194
 195     av_strlcpy(s->path, s1->filename, sizeof(s->path));
 196     s->img_number = 0;
 197     s->img_count = 0;
 198
 199     /* find format */
 200     if (s1->iformat->flags & AVFMT_NOFILE)
 201         s->is_pipe = 0;
 202     else{
 203         s->is_pipe = 1;
 204         st->need_parsing = AVSTREAM_PARSE_FULL;
 205     }
 206
 207     if (!ap->time_base.num) {
 208         av_set_pts_info(st, 60, 1, 25);
 209     } else {
 210         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 211     }
 212
 213     if(ap->width && ap->height){
 214         st->codec->width = ap->width;
 215         st->codec->height= ap->height;
 216     }
 217
 218     if (!s->is_pipe) {
 219         if (find_image_range(&first_index, &last_index, s->path) < 0)
 220             return AVERROR(EIO);
 221         s->img_first = first_index;
 222         s->img_last = last_index;
 223         s->img_number = first_index;
 224         /* compute duration */
 225         st->start_time = 0;
 226         st->duration = last_index - first_index + 1;
 227     }
 228
 229     if(ap->video_codec_id){
 230         st->codec->codec_type = CODEC_TYPE_VIDEO;
 231         st->codec->codec_id = ap->video_codec_id;
 232     }else if(ap->audio_codec_id){
 233         st->codec->codec_type = CODEC_TYPE_AUDIO;
 234         st->codec->codec_id = ap->audio_codec_id;
 235     }else{
 236         st->codec->codec_type = CODEC_TYPE_VIDEO;
 237         st->codec->codec_id = av_str2id(img_tags, s->path);
 238     }
 239     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 240         st->codec->pix_fmt = ap->pix_fmt;
 241
 242     return 0;
 243 }
 244
 245 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 246 {
 247     VideoData *s = s1->priv_data;
 248     char filename[1024];
 249     int i;
 250     int size[3]={0}, ret[3]={0};
 251     ByteIOContext *f[3];
 252     AVCodecContext *codec= s1->streams[0]->codec;
 253
 254     if (!s->is_pipe) {
 255         /* loop over input */
 256         if (s1->loop_input && s->img_number > s->img_last) {
 257             s->img_number = s->img_first;
 258         }
 259         if (av_get_frame_filename(filename, sizeof(filename),
 260                                   s->path, s->img_number)<0 && s->img_number > 1)
 261             return AVERROR(EIO);
 262         for(i=0; i<3; i++){
 263             if (url_fopen(&f[i], filename, URL_RDONLY) < 0)
 264                 return AVERROR(EIO);
 265             size[i]= url_fsize(f[i]);
 266
 267             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 268                 break;
 269             filename[ strlen(filename) - 1 ]= 'U' + i;
 270         }
 271
 272         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 273             infer_size(&codec->width, &codec->height, size[0]);
 274     } else {
 275         f[0] = s1->pb;
 276         if (url_feof(f[0]))
 277             return AVERROR(EIO);
 278         size[0]= 4096;
 279     }
 280
 281     av_new_packet(pkt, size[0] + size[1] + size[2]);
 282     pkt->stream_index = 0;
 283     pkt->flags |= PKT_FLAG_KEY;
 284
 285     pkt->size= 0;
 286     for(i=0; i<3; i++){
 287         if(size[i]){
 288             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 289             if (!s->is_pipe)
 290                 url_fclose(f[i]);
 291             if(ret[i]>0)
 292                 pkt->size += ret[i];
 293         }
 294     }
 295
 296     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 297         av_free_packet(pkt);
 298         return AVERROR(EIO); /* signal EOF */
 299     } else {
 300         s->img_count++;
 301         s->img_number++;
 302         return 0;
 303     }
 304 }
 305
 306 #if defined(CONFIG_IMAGE2_MUXER) || defined(CONFIG_IMAGE2PIPE_MUXER)
 307 /******************************************************/
 308 /* image output */
 309
 310 static int img_write_header(AVFormatContext *s)
 311 {
 312     VideoData *img = s->priv_data;
 313
 314     img->img_number = 1;
 315     av_strlcpy(img->path, s->filename, sizeof(img->path));
 316
 317     /* find format */
 318     if (s->oformat->flags & AVFMT_NOFILE)
 319         img->is_pipe = 0;
 320     else
 321         img->is_pipe = 1;
 322
 323     return 0;
 324 }
 325
 326 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 327 {
 328     VideoData *img = s->priv_data;
 329     ByteIOContext *pb[3];
 330     char filename[1024];
 331     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 332     int i;
 333
 334     if (!img->is_pipe) {
 335         if (av_get_frame_filename(filename, sizeof(filename),
 336                                   img->path, img->img_number) < 0 && img->img_number>1)
 337             return AVERROR(EIO);
 338         for(i=0; i<3; i++){
 339             if (url_fopen(&pb[i], filename, URL_WRONLY) < 0)
 340                 return AVERROR(EIO);
 341
 342             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 343                 break;
 344             filename[ strlen(filename) - 1 ]= 'U' + i;
 345         }
 346     } else {
 347         pb[0] = s->pb;
 348     }
 349
 350     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 351         int ysize = codec->width * codec->height;
 352         put_buffer(pb[0], pkt->data        , ysize);
 353         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 354         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 355         put_flush_packet(pb[1]);
 356         put_flush_packet(pb[2]);
 357         url_fclose(pb[1]);
 358         url_fclose(pb[2]);
 359     }else{
 360         put_buffer(pb[0], pkt->data, pkt->size);
 361     }
 362     put_flush_packet(pb[0]);
 363     if (!img->is_pipe) {
 364         url_fclose(pb[0]);
 365     }
 366
 367     img->img_number++;
 368     return 0;
 369 }
 370
 371 #endif /* defined(CONFIG_IMAGE2_MUXER) || defined(CONFIG_IMAGE2PIPE_MUXER) */
 372
 373 /* input */
 374 #ifdef CONFIG_IMAGE2_DEMUXER
 375 AVInputFormat image2_demuxer = {
 376     "image2",
 377     NULL_IF_CONFIG_SMALL("image2 sequence"),
 378     sizeof(VideoData),
 379     image_probe,
 380     img_read_header,
 381     img_read_packet,
 382     NULL,
 383     NULL,
 384     NULL,
 385     AVFMT_NOFILE,
 386 };
 387 #endif
 388 #ifdef CONFIG_IMAGE2PIPE_DEMUXER
 389 AVInputFormat image2pipe_demuxer = {
 390     "image2pipe",
 391     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 392     sizeof(VideoData),
 393     NULL, /* no probe */
 394     img_read_header,
 395     img_read_packet,
 396 };
 397 #endif
 398
 399 /* output */
 400 #ifdef CONFIG_IMAGE2_MUXER
 401 AVOutputFormat image2_muxer = {
 402     "image2",
 403     NULL_IF_CONFIG_SMALL("image2 sequence"),
 404     "",
 405     "bmp,jpeg,jpg,ljpg,pam,pbm,pgm,pgmyuv,png,ppm,sgi,tif,tiff",
 406     sizeof(VideoData),
 407     CODEC_ID_NONE,
 408     CODEC_ID_MJPEG,
 409     img_write_header,
 410     img_write_packet,
 411     NULL,
 412     .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
 413 };
 414 #endif
 415 #ifdef CONFIG_IMAGE2PIPE_MUXER
 416 AVOutputFormat image2pipe_muxer = {
 417     "image2pipe",
 418     NULL_IF_CONFIG_SMALL("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     .flags= AVFMT_NOTIMESTAMPS
 427 };
 428 #endif