FFmpeg: libavformat/img2.c Source File

00001 /*
00002  * Image format
00003  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
00004  * Copyright (c) 2004 Michael Niedermayer
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include "libavutil/intreadwrite.h"
00024 #include "libavutil/avstring.h"
00025 #include "libavutil/log.h"
00026 #include "libavutil/opt.h"
00027 #include "libavutil/pixdesc.h"
00028 #include "libavutil/parseutils.h"
00029 #include "avformat.h"
00030 #include "avio_internal.h"
00031 #include "internal.h"
00032 
00033 typedef struct {
00034     const AVClass *class;  
00035     int img_first;
00036     int img_last;
00037     int img_number;
00038     int img_count;
00039     int is_pipe;
00040     int split_planes;  
00041     char path[1024];
00042     char *pixel_format;     
00043     char *video_size;       
00044     char *framerate;        
00045     int loop;
00046     int updatefirst;
00047 } VideoData;
00048 
00049 typedef struct {
00050     enum CodecID id;
00051     const char *str;
00052 } IdStrMap;
00053 
00054 static const IdStrMap img_tags[] = {
00055     { CODEC_ID_MJPEG     , "jpeg"},
00056     { CODEC_ID_MJPEG     , "jpg"},
00057     { CODEC_ID_LJPEG     , "ljpg"},
00058     { CODEC_ID_JPEGLS    , "jls"},
00059     { CODEC_ID_PNG       , "png"},
00060     { CODEC_ID_PNG       , "mng"},
00061     { CODEC_ID_PPM       , "ppm"},
00062     { CODEC_ID_PPM       , "pnm"},
00063     { CODEC_ID_PGM       , "pgm"},
00064     { CODEC_ID_PGMYUV    , "pgmyuv"},
00065     { CODEC_ID_PBM       , "pbm"},
00066     { CODEC_ID_PAM       , "pam"},
00067     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
00068     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
00069     { CODEC_ID_MPEG4     , "mpg4-img"},
00070     { CODEC_ID_FFV1      , "ffv1-img"},
00071     { CODEC_ID_RAWVIDEO  , "y"},
00072     { CODEC_ID_RAWVIDEO  , "raw"},
00073     { CODEC_ID_BMP       , "bmp"},
00074     { CODEC_ID_GIF       , "gif"},
00075     { CODEC_ID_TARGA     , "tga"},
00076     { CODEC_ID_TIFF      , "tiff"},
00077     { CODEC_ID_TIFF      , "tif"},
00078     { CODEC_ID_SGI       , "sgi"},
00079     { CODEC_ID_PTX       , "ptx"},
00080     { CODEC_ID_PCX       , "pcx"},
00081     { CODEC_ID_SUNRAST   , "sun"},
00082     { CODEC_ID_SUNRAST   , "ras"},
00083     { CODEC_ID_SUNRAST   , "rs"},
00084     { CODEC_ID_SUNRAST   , "im1"},
00085     { CODEC_ID_SUNRAST   , "im8"},
00086     { CODEC_ID_SUNRAST   , "im24"},
00087     { CODEC_ID_SUNRAST   , "sunras"},
00088     { CODEC_ID_JPEG2000  , "j2k"},
00089     { CODEC_ID_JPEG2000  , "jp2"},
00090     { CODEC_ID_JPEG2000  , "jpc"},
00091     { CODEC_ID_DPX       , "dpx"},
00092     { CODEC_ID_PICTOR    , "pic"},
00093     { CODEC_ID_NONE      , NULL}
00094 };
00095 
00096 static const int sizes[][2] = {
00097     { 640, 480 },
00098     { 720, 480 },
00099     { 720, 576 },
00100     { 352, 288 },
00101     { 352, 240 },
00102     { 160, 128 },
00103     { 512, 384 },
00104     { 640, 352 },
00105     { 640, 240 },
00106 };
00107 
00108 static int infer_size(int *width_ptr, int *height_ptr, int size)
00109 {
00110     int i;
00111 
00112     for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
00113         if ((sizes[i][0] * sizes[i][1]) == size) {
00114             *width_ptr = sizes[i][0];
00115             *height_ptr = sizes[i][1];
00116             return 0;
00117         }
00118     }
00119     return -1;
00120 }
00121 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
00122 {
00123     str= strrchr(str, '.');
00124     if(!str) return CODEC_ID_NONE;
00125     str++;
00126 
00127     while (tags->id) {
00128         if (!av_strcasecmp(str, tags->str))
00129             return tags->id;
00130 
00131         tags++;
00132     }
00133     return CODEC_ID_NONE;
00134 }
00135 
00136 /* return -1 if no image found */
00137 static int find_image_range(int *pfirst_index, int *plast_index,
00138                             const char *path)
00139 {
00140     char buf[1024];
00141     int range, last_index, range1, first_index;
00142 
00143     /* find the first image */
00144     for(first_index = 0; first_index < 5; first_index++) {
00145         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
00146             *pfirst_index =
00147             *plast_index = 1;
00148             if (avio_check(buf, AVIO_FLAG_READ) > 0)
00149                 return 0;
00150             return -1;
00151         }
00152         if (avio_check(buf, AVIO_FLAG_READ) > 0)
00153             break;
00154     }
00155     if (first_index == 5)
00156         goto fail;
00157 
00158     /* find the last image */
00159     last_index = first_index;
00160     for(;;) {
00161         range = 0;
00162         for(;;) {
00163             if (!range)
00164                 range1 = 1;
00165             else
00166                 range1 = 2 * range;
00167             if (av_get_frame_filename(buf, sizeof(buf), path,
00168                                       last_index + range1) < 0)
00169                 goto fail;
00170             if (avio_check(buf, AVIO_FLAG_READ) <= 0)
00171                 break;
00172             range = range1;
00173             /* just in case... */
00174             if (range >= (1 << 30))
00175                 goto fail;
00176         }
00177         /* we are sure than image last_index + range exists */
00178         if (!range)
00179             break;
00180         last_index += range;
00181     }
00182     *pfirst_index = first_index;
00183     *plast_index = last_index;
00184     return 0;
00185  fail:
00186     return -1;
00187 }
00188 
00189 
00190 static int read_probe(AVProbeData *p)
00191 {
00192     if (p->filename && av_str2id(img_tags, p->filename)) {
00193         if (av_filename_number_test(p->filename))
00194             return AVPROBE_SCORE_MAX;
00195         else
00196             return AVPROBE_SCORE_MAX/2;
00197     }
00198     return 0;
00199 }
00200 
00201 enum CodecID ff_guess_image2_codec(const char *filename)
00202 {
00203     return av_str2id(img_tags, filename);
00204 }
00205 
00206 #if FF_API_GUESS_IMG2_CODEC
00207 enum CodecID av_guess_image2_codec(const char *filename){
00208     return av_str2id(img_tags, filename);
00209 }
00210 #endif
00211 
00212 static int read_header(AVFormatContext *s1, AVFormatParameters *ap)
00213 {
00214     VideoData *s = s1->priv_data;
00215     int first_index, last_index, ret = 0;
00216     int width = 0, height = 0;
00217     AVStream *st;
00218     enum PixelFormat pix_fmt = PIX_FMT_NONE;
00219     AVRational framerate;
00220 
00221     s1->ctx_flags |= AVFMTCTX_NOHEADER;
00222 
00223     st = avformat_new_stream(s1, NULL);
00224     if (!st) {
00225         return AVERROR(ENOMEM);
00226     }
00227 
00228     if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) {
00229         av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
00230         return AVERROR(EINVAL);
00231     }
00232     if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
00233         av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size);
00234         return ret;
00235     }
00236     if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
00237         av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
00238         return ret;
00239     }
00240 
00241 #if FF_API_LOOP_INPUT
00242     if (s1->loop_input)
00243         s->loop = s1->loop_input;
00244 #endif
00245 
00246     av_strlcpy(s->path, s1->filename, sizeof(s->path));
00247     s->img_number = 0;
00248     s->img_count = 0;
00249 
00250     /* find format */
00251     if (s1->iformat->flags & AVFMT_NOFILE)
00252         s->is_pipe = 0;
00253     else{
00254         s->is_pipe = 1;
00255         st->need_parsing = AVSTREAM_PARSE_FULL;
00256     }
00257 
00258     avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
00259 
00260     if (width && height) {
00261         st->codec->width  = width;
00262         st->codec->height = height;
00263     }
00264 
00265     if (!s->is_pipe) {
00266         if (find_image_range(&first_index, &last_index, s->path) < 0)
00267             return AVERROR(ENOENT);
00268         s->img_first = first_index;
00269         s->img_last = last_index;
00270         s->img_number = first_index;
00271         /* compute duration */
00272         st->start_time = 0;
00273         st->duration = last_index - first_index + 1;
00274     }
00275 
00276     if(s1->video_codec_id){
00277         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00278         st->codec->codec_id = s1->video_codec_id;
00279     }else if(s1->audio_codec_id){
00280         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00281         st->codec->codec_id = s1->audio_codec_id;
00282     }else{
00283         const char *str= strrchr(s->path, '.');
00284         s->split_planes = str && !av_strcasecmp(str + 1, "y");
00285         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00286         st->codec->codec_id = av_str2id(img_tags, s->path);
00287         if (st->codec->codec_id == CODEC_ID_LJPEG)
00288             st->codec->codec_id = CODEC_ID_MJPEG;
00289     }
00290     if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE)
00291         st->codec->pix_fmt = pix_fmt;
00292 
00293     return 0;
00294 }
00295 
00296 static int read_packet(AVFormatContext *s1, AVPacket *pkt)
00297 {
00298     VideoData *s = s1->priv_data;
00299     char filename[1024];
00300     int i;
00301     int size[3]={0}, ret[3]={0};
00302     AVIOContext *f[3];
00303     AVCodecContext *codec= s1->streams[0]->codec;
00304 
00305     if (!s->is_pipe) {
00306         /* loop over input */
00307         if (s->loop && s->img_number > s->img_last) {
00308             s->img_number = s->img_first;
00309         }
00310         if (s->img_number > s->img_last)
00311             return AVERROR_EOF;
00312         if (av_get_frame_filename(filename, sizeof(filename),
00313                                   s->path, s->img_number)<0 && s->img_number > 1)
00314             return AVERROR(EIO);
00315         for(i=0; i<3; i++){
00316             if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
00317                            &s1->interrupt_callback, NULL) < 0) {
00318                 if(i==1)
00319                     break;
00320                 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
00321                 return AVERROR(EIO);
00322             }
00323             size[i]= avio_size(f[i]);
00324 
00325             if(!s->split_planes)
00326                 break;
00327             filename[ strlen(filename) - 1 ]= 'U' + i;
00328         }
00329 
00330         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
00331             infer_size(&codec->width, &codec->height, size[0]);
00332     } else {
00333         f[0] = s1->pb;
00334         if (url_feof(f[0]))
00335             return AVERROR(EIO);
00336         size[0]= 4096;
00337     }
00338 
00339     av_new_packet(pkt, size[0] + size[1] + size[2]);
00340     pkt->stream_index = 0;
00341     pkt->flags |= AV_PKT_FLAG_KEY;
00342 
00343     pkt->size= 0;
00344     for(i=0; i<3; i++){
00345         if(size[i]){
00346             ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]);
00347             if (!s->is_pipe)
00348                 avio_close(f[i]);
00349             if(ret[i]>0)
00350                 pkt->size += ret[i];
00351         }
00352     }
00353 
00354     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
00355         av_free_packet(pkt);
00356         return AVERROR(EIO); /* signal EOF */
00357     } else {
00358         s->img_count++;
00359         s->img_number++;
00360         return 0;
00361     }
00362 }
00363 
00364 #if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
00365 /******************************************************/
00366 /* image output */
00367 
00368 static int write_header(AVFormatContext *s)
00369 {
00370     VideoData *img = s->priv_data;
00371     const char *str;
00372 
00373     img->img_number = 1;
00374     av_strlcpy(img->path, s->filename, sizeof(img->path));
00375 
00376     /* find format */
00377     if (s->oformat->flags & AVFMT_NOFILE)
00378         img->is_pipe = 0;
00379     else
00380         img->is_pipe = 1;
00381 
00382     str = strrchr(img->path, '.');
00383     img->split_planes = str && !av_strcasecmp(str + 1, "y");
00384     return 0;
00385 }
00386 
00387 static int write_packet(AVFormatContext *s, AVPacket *pkt)
00388 {
00389     VideoData *img = s->priv_data;
00390     AVIOContext *pb[3];
00391     char filename[1024];
00392     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
00393     int i;
00394 
00395     if (!img->is_pipe) {
00396         if (av_get_frame_filename(filename, sizeof(filename),
00397                                   img->path, img->img_number) < 0 && img->img_number>1 && !img->updatefirst) {
00398             av_log(s, AV_LOG_ERROR,
00399                    "Could not get frame filename number %d from pattern '%s'\n",
00400                    img->img_number, img->path);
00401             return AVERROR(EINVAL);
00402         }
00403         for(i=0; i<3; i++){
00404             if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
00405                            &s->interrupt_callback, NULL) < 0) {
00406                 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
00407                 return AVERROR(EIO);
00408             }
00409 
00410             if(!img->split_planes)
00411                 break;
00412             filename[ strlen(filename) - 1 ]= 'U' + i;
00413         }
00414     } else {
00415         pb[0] = s->pb;
00416     }
00417 
00418     if(img->split_planes){
00419         int ysize = codec->width * codec->height;
00420         avio_write(pb[0], pkt->data        , ysize);
00421         avio_write(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
00422         avio_write(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
00423         avio_flush(pb[1]);
00424         avio_flush(pb[2]);
00425         avio_close(pb[1]);
00426         avio_close(pb[2]);
00427     }else{
00428         if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
00429             AVStream *st = s->streams[0];
00430             if(st->codec->extradata_size > 8 &&
00431                AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
00432                 if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
00433                     goto error;
00434                 avio_wb32(pb[0], 12);
00435                 ffio_wfourcc(pb[0], "jP  ");
00436                 avio_wb32(pb[0], 0x0D0A870A); // signature
00437                 avio_wb32(pb[0], 20);
00438                 ffio_wfourcc(pb[0], "ftyp");
00439                 ffio_wfourcc(pb[0], "jp2 ");
00440                 avio_wb32(pb[0], 0);
00441                 ffio_wfourcc(pb[0], "jp2 ");
00442                 avio_write(pb[0], st->codec->extradata, st->codec->extradata_size);
00443             }else if(pkt->size >= 8 && AV_RB32(pkt->data) == 0xFF4FFF51){
00444                 //jpeg2000 codestream
00445             }else if(pkt->size < 8 ||
00446                      (!st->codec->extradata_size &&
00447                       AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
00448             error:
00449                 av_log(s, AV_LOG_ERROR, "malformated jpeg2000 codestream %X\n", AV_RB32(pkt->data));
00450                 return -1;
00451             }
00452         }
00453         avio_write(pb[0], pkt->data, pkt->size);
00454     }
00455     avio_flush(pb[0]);
00456     if (!img->is_pipe) {
00457         avio_close(pb[0]);
00458     }
00459 
00460     img->img_number++;
00461     return 0;
00462 }
00463 
00464 #endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
00465 
00466 #define OFFSET(x) offsetof(VideoData, x)
00467 #define DEC AV_OPT_FLAG_DECODING_PARAM
00468 #define ENC AV_OPT_FLAG_ENCODING_PARAM
00469 static const AVOption options[] = {
00470     { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
00471     { "video_size",   "", OFFSET(video_size),   AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
00472     { "framerate",    "", OFFSET(framerate),    AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
00473     { "loop",         "", OFFSET(loop),         AV_OPT_TYPE_INT,    {.dbl = 0},    0, 1, DEC },
00474     { NULL },
00475 };
00476 
00477 static const AVOption muxoptions[] = {
00478     { "updatefirst",  "", OFFSET(updatefirst),  AV_OPT_TYPE_INT,    {.dbl = 0},    0, 1, ENC },
00479     { NULL },
00480 };
00481 
00482 /* input */
00483 #if CONFIG_IMAGE2_DEMUXER
00484 static const AVClass img2_class = {
00485     .class_name = "image2 demuxer",
00486     .item_name  = av_default_item_name,
00487     .option     = options,
00488     .version    = LIBAVUTIL_VERSION_INT,
00489 };
00490 AVInputFormat ff_image2_demuxer = {
00491     .name           = "image2",
00492     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
00493     .priv_data_size = sizeof(VideoData),
00494     .read_probe     = read_probe,
00495     .read_header    = read_header,
00496     .read_packet    = read_packet,
00497     .flags          = AVFMT_NOFILE,
00498     .priv_class     = &img2_class,
00499 };
00500 #endif
00501 #if CONFIG_IMAGE2PIPE_DEMUXER
00502 static const AVClass img2pipe_class = {
00503     .class_name = "image2pipe demuxer",
00504     .item_name  = av_default_item_name,
00505     .option     = options,
00506     .version    = LIBAVUTIL_VERSION_INT,
00507 };
00508 AVInputFormat ff_image2pipe_demuxer = {
00509     .name           = "image2pipe",
00510     .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
00511     .priv_data_size = sizeof(VideoData),
00512     .read_header    = read_header,
00513     .read_packet    = read_packet,
00514     .priv_class     = &img2pipe_class,
00515 };
00516 #endif
00517 
00518 /* output */
00519 #if CONFIG_IMAGE2_MUXER
00520 static const AVClass img2mux_class = {
00521     .class_name = "image2 muxer",
00522     .item_name  = av_default_item_name,
00523     .option     = muxoptions,
00524     .version    = LIBAVUTIL_VERSION_INT,
00525 };
00526 AVOutputFormat ff_image2_muxer = {
00527     .name           = "image2",
00528     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
00529     .extensions     = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
00530                       "ppm,sgi,tga,tif,tiff,jp2",
00531     .priv_data_size = sizeof(VideoData),
00532     .video_codec    = CODEC_ID_MJPEG,
00533     .write_header   = write_header,
00534     .write_packet   = write_packet,
00535     .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
00536     .priv_class     = &img2mux_class,
00537 };
00538 #endif
00539 #if CONFIG_IMAGE2PIPE_MUXER
00540 AVOutputFormat ff_image2pipe_muxer = {
00541     .name           = "image2pipe",
00542     .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
00543     .priv_data_size = sizeof(VideoData),
00544     .video_codec    = CODEC_ID_MJPEG,
00545     .write_header   = write_header,
00546     .write_packet   = write_packet,
00547     .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
00548 };
00549 #endif