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/intreadwrite.h"
  24 #include "libavutil/avstring.h"
  25 #include "avformat.h"
  26 #include <strings.h>
  27
  28 typedef struct {
  29     int img_first;
  30     int img_last;
  31     int img_number;
  32     int img_count;
  33     int is_pipe;
  34     char path[1024];
  35 } VideoData;
  36
  37 typedef struct {
  38     enum CodecID id;
  39     const char *str;
  40 } IdStrMap;
  41
  42 static const IdStrMap img_tags[] = {
  43     { CODEC_ID_MJPEG     , "jpeg"},
  44     { CODEC_ID_MJPEG     , "jpg"},
  45     { CODEC_ID_LJPEG     , "ljpg"},
  46     { CODEC_ID_PNG       , "png"},
  47     { CODEC_ID_PNG       , "mng"},
  48     { CODEC_ID_PPM       , "ppm"},
  49     { CODEC_ID_PPM       , "pnm"},
  50     { CODEC_ID_PGM       , "pgm"},
  51     { CODEC_ID_PGMYUV    , "pgmyuv"},
  52     { CODEC_ID_PBM       , "pbm"},
  53     { CODEC_ID_PAM       , "pam"},
  54     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
  55     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
  56     { CODEC_ID_MPEG4     , "mpg4-img"},
  57     { CODEC_ID_FFV1      , "ffv1-img"},
  58     { CODEC_ID_RAWVIDEO  , "y"},
  59     { CODEC_ID_BMP       , "bmp"},
  60     { CODEC_ID_GIF       , "gif"},
  61     { CODEC_ID_TARGA     , "tga"},
  62     { CODEC_ID_TIFF      , "tiff"},
  63     { CODEC_ID_TIFF      , "tif"},
  64     { CODEC_ID_SGI       , "sgi"},
  65     { CODEC_ID_PTX       , "ptx"},
  66     { CODEC_ID_PCX       , "pcx"},
  67     { CODEC_ID_SUNRAST   , "sun"},
  68     { CODEC_ID_SUNRAST   , "ras"},
  69     { CODEC_ID_SUNRAST   , "rs"},
  70     { CODEC_ID_SUNRAST   , "im1"},
  71     { CODEC_ID_SUNRAST   , "im8"},
  72     { CODEC_ID_SUNRAST   , "im24"},
  73     { CODEC_ID_SUNRAST   , "sunras"},
  74     { CODEC_ID_JPEG2000  , "jp2"},
  75     { CODEC_ID_DPX       , "dpx"},
  76     { CODEC_ID_NONE      , NULL}
  77 };
  78
  79 static const int sizes[][2] = {
  80     { 640, 480 },
  81     { 720, 480 },
  82     { 720, 576 },
  83     { 352, 288 },
  84     { 352, 240 },
  85     { 160, 128 },
  86     { 512, 384 },
  87     { 640, 352 },
  88     { 640, 240 },
  89 };
  90
  91 static int infer_size(int *width_ptr, int *height_ptr, int size)
  92 {
  93     int i;
  94
  95     for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
  96         if ((sizes[i][0] * sizes[i][1]) == size) {
  97             *width_ptr = sizes[i][0];
  98             *height_ptr = sizes[i][1];
  99             return 0;
 100         }
 101     }
 102     return -1;
 103 }
 104 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
 105 {
 106     str= strrchr(str, '.');
 107     if(!str) return CODEC_ID_NONE;
 108     str++;
 109
 110     while (tags->id) {
 111         if (!strcasecmp(str, tags->str))
 112             return tags->id;
 113
 114         tags++;
 115     }
 116     return CODEC_ID_NONE;
 117 }
 118
 119 /* return -1 if no image found */
 120 static int find_image_range(int *pfirst_index, int *plast_index,
 121                             const char *path)
 122 {
 123     char buf[1024];
 124     int range, last_index, range1, first_index;
 125
 126     /* find the first image */
 127     for(first_index = 0; first_index < 5; first_index++) {
 128         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
 129             *pfirst_index =
 130             *plast_index = 1;
 131             return 0;
 132         }
 133         if (url_exist(buf))
 134             break;
 135     }
 136     if (first_index == 5)
 137         goto fail;
 138
 139     /* find the last image */
 140     last_index = first_index;
 141     for(;;) {
 142         range = 0;
 143         for(;;) {
 144             if (!range)
 145                 range1 = 1;
 146             else
 147                 range1 = 2 * range;
 148             if (av_get_frame_filename(buf, sizeof(buf), path,
 149                                       last_index + range1) < 0)
 150                 goto fail;
 151             if (!url_exist(buf))
 152                 break;
 153             range = range1;
 154             /* just in case... */
 155             if (range >= (1 << 30))
 156                 goto fail;
 157         }
 158         /* we are sure than image last_index + range exists */
 159         if (!range)
 160             break;
 161         last_index += range;
 162     }
 163     *pfirst_index = first_index;
 164     *plast_index = last_index;
 165     return 0;
 166  fail:
 167     return -1;
 168 }
 169
 170
 171 static int image_probe(AVProbeData *p)
 172 {
 173     if (p->filename && av_str2id(img_tags, p->filename)) {
 174         if (av_filename_number_test(p->filename))
 175             return AVPROBE_SCORE_MAX;
 176         else
 177             return AVPROBE_SCORE_MAX/2;
 178     }
 179     return 0;
 180 }
 181
 182 enum CodecID av_guess_image2_codec(const char *filename){
 183     return av_str2id(img_tags, filename);
 184 }
 185
 186 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 187 {
 188     VideoData *s = s1->priv_data;
 189     int first_index, last_index;
 190     AVStream *st;
 191
 192     s1->ctx_flags |= AVFMTCTX_NOHEADER;
 193
 194     st = av_new_stream(s1, 0);
 195     if (!st) {
 196         return AVERROR(ENOMEM);
 197     }
 198
 199     av_strlcpy(s->path, s1->filename, sizeof(s->path));
 200     s->img_number = 0;
 201     s->img_count = 0;
 202
 203     /* find format */
 204     if (s1->iformat->flags & AVFMT_NOFILE)
 205         s->is_pipe = 0;
 206     else{
 207         s->is_pipe = 1;
 208         st->need_parsing = AVSTREAM_PARSE_FULL;
 209     }
 210
 211     if (!ap->time_base.num) {
 212         av_set_pts_info(st, 60, 1, 25);
 213     } else {
 214         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
 215     }
 216
 217     if(ap->width && ap->height){
 218         st->codec->width = ap->width;
 219         st->codec->height= ap->height;
 220     }
 221
 222     if (!s->is_pipe) {
 223         if (find_image_range(&first_index, &last_index, s->path) < 0)
 224             return AVERROR(EIO);
 225         s->img_first = first_index;
 226         s->img_last = last_index;
 227         s->img_number = first_index;
 228         /* compute duration */
 229         st->start_time = 0;
 230         st->duration = last_index - first_index + 1;
 231     }
 232
 233     if(ap->video_codec_id){
 234         st->codec->codec_type = CODEC_TYPE_VIDEO;
 235         st->codec->codec_id = ap->video_codec_id;
 236     }else if(ap->audio_codec_id){
 237         st->codec->codec_type = CODEC_TYPE_AUDIO;
 238         st->codec->codec_id = ap->audio_codec_id;
 239     }else{
 240         st->codec->codec_type = CODEC_TYPE_VIDEO;
 241         st->codec->codec_id = av_str2id(img_tags, s->path);
 242     }
 243     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
 244         st->codec->pix_fmt = ap->pix_fmt;
 245
 246     return 0;
 247 }
 248
 249 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
 250 {
 251     VideoData *s = s1->priv_data;
 252     char filename[1024];
 253     int i;
 254     int size[3]={0}, ret[3]={0};
 255     ByteIOContext *f[3];
 256     AVCodecContext *codec= s1->streams[0]->codec;
 257
 258     if (!s->is_pipe) {
 259         /* loop over input */
 260         if (s1->loop_input && s->img_number > s->img_last) {
 261             s->img_number = s->img_first;
 262         }
 263         if (av_get_frame_filename(filename, sizeof(filename),
 264                                   s->path, s->img_number)<0 && s->img_number > 1)
 265             return AVERROR(EIO);
 266         for(i=0; i<3; i++){
 267             if (url_fopen(&f[i], filename, URL_RDONLY) < 0)
 268                 return AVERROR(EIO);
 269             size[i]= url_fsize(f[i]);
 270
 271             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 272                 break;
 273             filename[ strlen(filename) - 1 ]= 'U' + i;
 274         }
 275
 276         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
 277             infer_size(&codec->width, &codec->height, size[0]);
 278     } else {
 279         f[0] = s1->pb;
 280         if (url_feof(f[0]))
 281             return AVERROR(EIO);
 282         size[0]= 4096;
 283     }
 284
 285     av_new_packet(pkt, size[0] + size[1] + size[2]);
 286     pkt->stream_index = 0;
 287     pkt->flags |= PKT_FLAG_KEY;
 288
 289     pkt->size= 0;
 290     for(i=0; i<3; i++){
 291         if(size[i]){
 292             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
 293             if (!s->is_pipe)
 294                 url_fclose(f[i]);
 295             if(ret[i]>0)
 296                 pkt->size += ret[i];
 297         }
 298     }
 299
 300     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
 301         av_free_packet(pkt);
 302         return AVERROR(EIO); /* signal EOF */
 303     } else {
 304         s->img_count++;
 305         s->img_number++;
 306         return 0;
 307     }
 308 }
 309
 310 #if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
 311 /******************************************************/
 312 /* image output */
 313
 314 static int img_write_header(AVFormatContext *s)
 315 {
 316     VideoData *img = s->priv_data;
 317
 318     img->img_number = 1;
 319     av_strlcpy(img->path, s->filename, sizeof(img->path));
 320
 321     /* find format */
 322     if (s->oformat->flags & AVFMT_NOFILE)
 323         img->is_pipe = 0;
 324     else
 325         img->is_pipe = 1;
 326
 327     return 0;
 328 }
 329
 330 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 331 {
 332     VideoData *img = s->priv_data;
 333     ByteIOContext *pb[3];
 334     char filename[1024];
 335     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
 336     int i;
 337
 338     if (!img->is_pipe) {
 339         if (av_get_frame_filename(filename, sizeof(filename),
 340                                   img->path, img->img_number) < 0 && img->img_number>1)
 341             return AVERROR(EIO);
 342         for(i=0; i<3; i++){
 343             if (url_fopen(&pb[i], filename, URL_WRONLY) < 0)
 344                 return AVERROR(EIO);
 345
 346             if(codec->codec_id != CODEC_ID_RAWVIDEO)
 347                 break;
 348             filename[ strlen(filename) - 1 ]= 'U' + i;
 349         }
 350     } else {
 351         pb[0] = s->pb;
 352     }
 353
 354     if(codec->codec_id == CODEC_ID_RAWVIDEO){
 355         int ysize = codec->width * codec->height;
 356         put_buffer(pb[0], pkt->data        , ysize);
 357         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
 358         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
 359         put_flush_packet(pb[1]);
 360         put_flush_packet(pb[2]);
 361         url_fclose(pb[1]);
 362         url_fclose(pb[2]);
 363     }else{
 364         if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
 365             AVStream *st = s->streams[0];
 366             if(st->codec->extradata_size > 8 &&
 367                AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
 368                 if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
 369                     goto error;
 370                 put_be32(pb[0], 12);
 371                 put_tag (pb[0], "jP  ");
 372                 put_be32(pb[0], 0x0D0A870A); // signature
 373                 put_be32(pb[0], 20);
 374                 put_tag (pb[0], "ftyp");
 375                 put_tag (pb[0], "jp2 ");
 376                 put_be32(pb[0], 0);
 377                 put_tag (pb[0], "jp2 ");
 378                 put_buffer(pb[0], st->codec->extradata, st->codec->extradata_size);
 379             }else if(pkt->size < 8 ||
 380                      (!st->codec->extradata_size &&
 381                       AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
 382             error:
 383                 av_log(s, AV_LOG_ERROR, "malformated jpeg2000 codestream\n");
 384                 return -1;
 385             }
 386         }
 387         put_buffer(pb[0], pkt->data, pkt->size);
 388     }
 389     put_flush_packet(pb[0]);
 390     if (!img->is_pipe) {
 391         url_fclose(pb[0]);
 392     }
 393
 394     img->img_number++;
 395     return 0;
 396 }
 397
 398 #endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
 399
 400 /* input */
 401 #if CONFIG_IMAGE2_DEMUXER
 402 AVInputFormat image2_demuxer = {
 403     "image2",
 404     NULL_IF_CONFIG_SMALL("image2 sequence"),
 405     sizeof(VideoData),
 406     image_probe,
 407     img_read_header,
 408     img_read_packet,
 409     NULL,
 410     NULL,
 411     NULL,
 412     AVFMT_NOFILE,
 413 };
 414 #endif
 415 #if CONFIG_IMAGE2PIPE_DEMUXER
 416 AVInputFormat image2pipe_demuxer = {
 417     "image2pipe",
 418     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 419     sizeof(VideoData),
 420     NULL, /* no probe */
 421     img_read_header,
 422     img_read_packet,
 423 };
 424 #endif
 425
 426 /* output */
 427 #if CONFIG_IMAGE2_MUXER
 428 AVOutputFormat image2_muxer = {
 429     "image2",
 430     NULL_IF_CONFIG_SMALL("image2 sequence"),
 431     "",
 432     "bmp,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,ppm,sgi,tif,tiff,jp2",
 433     sizeof(VideoData),
 434     CODEC_ID_NONE,
 435     CODEC_ID_MJPEG,
 436     img_write_header,
 437     img_write_packet,
 438     NULL,
 439     .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
 440 };
 441 #endif
 442 #if CONFIG_IMAGE2PIPE_MUXER
 443 AVOutputFormat image2pipe_muxer = {
 444     "image2pipe",
 445     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
 446     "",
 447     "",
 448     sizeof(VideoData),
 449     CODEC_ID_NONE,
 450     CODEC_ID_MJPEG,
 451     img_write_header,
 452     img_write_packet,
 453     .flags= AVFMT_NOTIMESTAMPS
 454 };
 455 #endif