/* * Image format * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2004 Michael Niedermayer * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/avstring.h" #include "libavutil/log.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "libavutil/parseutils.h" #include "avformat.h" #include "internal.h" typedef struct { const AVClass *class; /**< Class for private options. */ int img_first; int img_last; int img_number; int img_count; int is_pipe; char path[1024]; char *pixel_format; /**< Set by a private option. */ char *video_size; /**< Set by a private option. */ char *framerate; /**< Set by a private option. */ int loop; } VideoDemuxData; static const 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<FF_ARRAY_ELEMS(sizes);i++) { if ((sizes[i][0] * sizes[i][1]) == size) { *width_ptr = sizes[i][0]; *height_ptr = sizes[i][1]; return 0; } } return -1; } /* 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; if (avio_check(buf, AVIO_FLAG_READ) > 0) return 0; return -1; } if (avio_check(buf, AVIO_FLAG_READ) > 0) 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 (avio_check(buf, AVIO_FLAG_READ) <= 0) 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 read_probe(AVProbeData *p) { if (p->filename && ff_guess_image2_codec(p->filename)) { if (av_filename_number_test(p->filename)) return AVPROBE_SCORE_MAX; else return AVPROBE_SCORE_MAX/2; } return 0; } static int read_header(AVFormatContext *s1) { VideoDemuxData *s = s1->priv_data; int first_index, last_index, ret = 0; int width = 0, height = 0; AVStream *st; enum PixelFormat pix_fmt = PIX_FMT_NONE; AVRational framerate; s1->ctx_flags |= AVFMTCTX_NOHEADER; st = avformat_new_stream(s1, NULL); if (!st) { return AVERROR(ENOMEM); } if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) { av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format); return AVERROR(EINVAL); } if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) { av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size); return ret; } if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) { av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate); return ret; } 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; } avpriv_set_pts_info(st, 60, framerate.den, framerate.num); if (width && height) { st->codec->width = width; st->codec->height = height; } if (!s->is_pipe) { if (find_image_range(&first_index, &last_index, s->path) < 0) return AVERROR(ENOENT); 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(s1->video_codec_id){ st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = s1->video_codec_id; }else if(s1->audio_codec_id){ st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = s1->audio_codec_id; }else{ st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = ff_guess_image2_codec(s->path); } if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE) st->codec->pix_fmt = pix_fmt; return 0; } static int read_packet(AVFormatContext *s1, AVPacket *pkt) { VideoDemuxData *s = s1->priv_data; char filename[1024]; int i; int size[3]={0}, ret[3]={0}; AVIOContext *f[3]; AVCodecContext *codec= s1->streams[0]->codec; if (!s->is_pipe) { /* loop over input */ if (s->loop && s->img_number > s->img_last) { s->img_number = s->img_first; } if (s->img_number > s->img_last) return AVERROR_EOF; 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 (avio_open2(&f[i], filename, AVIO_FLAG_READ, &s1->interrupt_callback, NULL) < 0) { if(i==1) break; av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename); return AVERROR(EIO); } size[i]= avio_size(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 (f[0]->eof_reached) return AVERROR(EIO); size[0]= 4096; } av_new_packet(pkt, size[0] + size[1] + size[2]); pkt->stream_index = 0; pkt->flags |= AV_PKT_FLAG_KEY; pkt->size= 0; for(i=0; i<3; i++){ if(size[i]){ ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]); if (!s->is_pipe) avio_close(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; } } #define OFFSET(x) offsetof(VideoDemuxData, x) #define DEC AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, { "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC }, { "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, DEC }, { NULL }, }; #if CONFIG_IMAGE2_DEMUXER static const AVClass img2_class = { .class_name = "image2 demuxer", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVInputFormat ff_image2_demuxer = { .name = "image2", .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"), .priv_data_size = sizeof(VideoDemuxData), .read_probe = read_probe, .read_header = read_header, .read_packet = read_packet, .flags = AVFMT_NOFILE, .priv_class = &img2_class, }; #endif #if CONFIG_IMAGE2PIPE_DEMUXER static const AVClass img2pipe_class = { .class_name = "image2pipe demuxer", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVInputFormat ff_image2pipe_demuxer = { .name = "image2pipe", .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"), .priv_data_size = sizeof(VideoDemuxData), .read_header = read_header, .read_packet = read_packet, .priv_class = &img2pipe_class, }; #endif