/* * Image format * Copyright (c) 2000, 2001, 2002 Fabrice Bellard. * Copyright (c) 2004 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/avstring.h" #include "avformat.h" #include <strings.h> typedef struct { int img_first; int img_last; int img_number; int img_count; int is_pipe; char path[1024]; } VideoData; typedef struct { enum CodecID id; const char *str; } IdStrMap; static const IdStrMap img_tags[] = { { CODEC_ID_MJPEG , "jpeg"}, { CODEC_ID_MJPEG , "jpg"}, { CODEC_ID_LJPEG , "ljpg"}, { CODEC_ID_PNG , "png"}, { CODEC_ID_PNG , "mng"}, { CODEC_ID_PPM , "ppm"}, { CODEC_ID_PGM , "pgm"}, { CODEC_ID_PGMYUV , "pgmyuv"}, { CODEC_ID_PBM , "pbm"}, { CODEC_ID_PAM , "pam"}, { CODEC_ID_MPEG1VIDEO, "mpg1-img"}, { CODEC_ID_MPEG2VIDEO, "mpg2-img"}, { CODEC_ID_MPEG4 , "mpg4-img"}, { CODEC_ID_FFV1 , "ffv1-img"}, { CODEC_ID_RAWVIDEO , "y"}, { CODEC_ID_BMP , "bmp"}, { CODEC_ID_GIF , "gif"}, { CODEC_ID_TARGA , "tga"}, { CODEC_ID_TIFF , "tiff"}, { CODEC_ID_SGI , "sgi"}, { CODEC_ID_PTX , "ptx"}, { CODEC_ID_PCX , "pcx"}, { CODEC_ID_SUNRAST , "sun"}, { CODEC_ID_SUNRAST , "ras"}, { CODEC_ID_SUNRAST , "rs"}, { CODEC_ID_SUNRAST , "im1"}, { CODEC_ID_SUNRAST , "im8"}, { CODEC_ID_SUNRAST , "im24"}, { CODEC_ID_SUNRAST , "sunras"}, { CODEC_ID_NONE , NULL} }; static int sizes[][2] = { { 640, 480 }, { 720, 480 }, { 720, 576 }, { 352, 288 }, { 352, 240 }, { 160, 128 }, { 512, 384 }, { 640, 352 }, { 640, 240 }, }; static int infer_size(int *width_ptr, int *height_ptr, int size) { int i; for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) { if ((sizes[i][0] * sizes[i][1]) == size) { *width_ptr = sizes[i][0]; *height_ptr = sizes[i][1]; return 0; } } return -1; } static enum CodecID av_str2id(const IdStrMap *tags, const char *str) { str= strrchr(str, '.'); if(!str) return CODEC_ID_NONE; str++; while (tags->id) { if (!strcasecmp(str, tags->str)) return tags->id; tags++; } return CODEC_ID_NONE; } /* return -1 if no image found */ static int find_image_range(int *pfirst_index, int *plast_index, const char *path) { char buf[1024]; int range, last_index, range1, first_index; /* find the first image */ for(first_index = 0; first_index < 5; first_index++) { if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){ *pfirst_index = *plast_index = 1; return 0; } if (url_exist(buf)) break; } if (first_index == 5) goto fail; /* find the last image */ last_index = first_index; for(;;) { range = 0; for(;;) { if (!range) range1 = 1; else range1 = 2 * range; if (av_get_frame_filename(buf, sizeof(buf), path, last_index + range1) < 0) goto fail; if (!url_exist(buf)) break; range = range1; /* just in case... */ if (range >= (1 << 30)) goto fail; } /* we are sure than image last_index + range exists */ if (!range) break; last_index += range; } *pfirst_index = first_index; *plast_index = last_index; return 0; fail: return -1; } static int image_probe(AVProbeData *p) { if (p->filename && av_str2id(img_tags, p->filename)) { if (av_filename_number_test(p->filename)) return AVPROBE_SCORE_MAX; else return AVPROBE_SCORE_MAX/2; } return 0; } enum CodecID av_guess_image2_codec(const char *filename){ return av_str2id(img_tags, filename); } static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap) { VideoData *s = s1->priv_data; int first_index, last_index; AVStream *st; s1->ctx_flags |= AVFMTCTX_NOHEADER; st = av_new_stream(s1, 0); if (!st) { return AVERROR(ENOMEM); } av_strlcpy(s->path, s1->filename, sizeof(s->path)); s->img_number = 0; s->img_count = 0; /* find format */ if (s1->iformat->flags & AVFMT_NOFILE) s->is_pipe = 0; else{ s->is_pipe = 1; st->need_parsing = AVSTREAM_PARSE_FULL; } if (!ap->time_base.num) { av_set_pts_info(st, 60, 1, 25); } else { av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den); } if(ap->width && ap->height){ st->codec->width = ap->width; st->codec->height= ap->height; } if (!s->is_pipe) { if (find_image_range(&first_index, &last_index, s->path) < 0) return AVERROR(EIO); s->img_first = first_index; s->img_last = last_index; s->img_number = first_index; /* compute duration */ st->start_time = 0; st->duration = last_index - first_index + 1; } if(ap->video_codec_id){ st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_id = ap->video_codec_id; }else if(ap->audio_codec_id){ st->codec->codec_type = CODEC_TYPE_AUDIO; st->codec->codec_id = ap->audio_codec_id; }else{ st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_id = av_str2id(img_tags, s->path); } if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE) st->codec->pix_fmt = ap->pix_fmt; return 0; } static int img_read_packet(AVFormatContext *s1, AVPacket *pkt) { VideoData *s = s1->priv_data; char filename[1024]; int i; int size[3]={0}, ret[3]={0}; ByteIOContext *f[3]; AVCodecContext *codec= s1->streams[0]->codec; if (!s->is_pipe) { /* loop over input */ if (s1->loop_input && s->img_number > s->img_last) { s->img_number = s->img_first; } if (av_get_frame_filename(filename, sizeof(filename), s->path, s->img_number)<0 && s->img_number > 1) return AVERROR(EIO); for(i=0; i<3; i++){ if (url_fopen(&f[i], filename, URL_RDONLY) < 0) return AVERROR(EIO); size[i]= url_fsize(f[i]); if(codec->codec_id != CODEC_ID_RAWVIDEO) break; filename[ strlen(filename) - 1 ]= 'U' + i; } if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width) infer_size(&codec->width, &codec->height, size[0]); } else { f[0] = s1->pb; if (url_feof(f[0])) return AVERROR(EIO); size[0]= 4096; } av_new_packet(pkt, size[0] + size[1] + size[2]); pkt->stream_index = 0; pkt->flags |= PKT_FLAG_KEY; pkt->size= 0; for(i=0; i<3; i++){ if(size[i]){ ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]); if (!s->is_pipe) url_fclose(f[i]); if(ret[i]>0) pkt->size += ret[i]; } } if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) { av_free_packet(pkt); return AVERROR(EIO); /* signal EOF */ } else { s->img_count++; s->img_number++; return 0; } } static int img_read_close(AVFormatContext *s1) { return 0; } #ifdef CONFIG_MUXERS /******************************************************/ /* image output */ static int img_write_header(AVFormatContext *s) { VideoData *img = s->priv_data; img->img_number = 1; av_strlcpy(img->path, s->filename, sizeof(img->path)); /* find format */ if (s->oformat->flags & AVFMT_NOFILE) img->is_pipe = 0; else img->is_pipe = 1; return 0; } static int img_write_packet(AVFormatContext *s, AVPacket *pkt) { VideoData *img = s->priv_data; ByteIOContext *pb[3]; char filename[1024]; AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec; int i; if (!img->is_pipe) { if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 && img->img_number>1) return AVERROR(EIO); for(i=0; i<3; i++){ if (url_fopen(&pb[i], filename, URL_WRONLY) < 0) return AVERROR(EIO); if(codec->codec_id != CODEC_ID_RAWVIDEO) break; filename[ strlen(filename) - 1 ]= 'U' + i; } } else { pb[0] = s->pb; } if(codec->codec_id == CODEC_ID_RAWVIDEO){ int ysize = codec->width * codec->height; put_buffer(pb[0], pkt->data , ysize); put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2); put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2); put_flush_packet(pb[1]); put_flush_packet(pb[2]); url_fclose(pb[1]); url_fclose(pb[2]); }else{ put_buffer(pb[0], pkt->data, pkt->size); } put_flush_packet(pb[0]); if (!img->is_pipe) { url_fclose(pb[0]); } img->img_number++; return 0; } #endif /* CONFIG_MUXERS */ /* input */ #ifdef CONFIG_IMAGE2_DEMUXER AVInputFormat image2_demuxer = { "image2", "image2 sequence", sizeof(VideoData), image_probe, img_read_header, img_read_packet, img_read_close, NULL, NULL, AVFMT_NOFILE, }; #endif #ifdef CONFIG_IMAGE2PIPE_DEMUXER AVInputFormat image2pipe_demuxer = { "image2pipe", "piped image2 sequence", sizeof(VideoData), NULL, /* no probe */ img_read_header, img_read_packet, img_read_close, NULL, }; #endif /* output */ #ifdef CONFIG_IMAGE2_MUXER AVOutputFormat image2_muxer = { "image2", "image2 sequence", "", "", sizeof(VideoData), CODEC_ID_NONE, CODEC_ID_MJPEG, img_write_header, img_write_packet, NULL, AVFMT_NOFILE, }; #endif #ifdef CONFIG_IMAGE2PIPE_MUXER AVOutputFormat image2pipe_muxer = { "image2pipe", "piped image2 sequence", "", "", sizeof(VideoData), CODEC_ID_NONE, CODEC_ID_MJPEG, img_write_header, img_write_packet, }; #endif