/* * Image format * Copyright (c) 2000, 2001, 2002 Fabrice Bellard. * * 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 "avformat.h" typedef struct { int width; int height; int img_first; int img_last; int img_number; int img_count; int img_size; AVImageFormat *img_fmt; int pix_fmt; int is_pipe; char path[1024]; /* temporary usage */ void *ptr; } VideoData; /* 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) goto fail; 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 (av_filename_number_test(p->filename) && guess_image_format(p->filename)) return AVPROBE_SCORE_MAX-1; else return 0; } static int read_header_alloc_cb(void *opaque, AVImageInfo *info) { VideoData *s = opaque; s->width = info->width; s->height = info->height; s->pix_fmt = info->pix_fmt; /* stop image reading but no error */ return 1; } static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap) { VideoData *s = s1->priv_data; int ret, first_index, last_index; char buf[1024]; ByteIOContext pb1, *f = &pb1; AVStream *st; st = av_new_stream(s1, 0); if (!st) { return -ENOMEM; } if (ap->image_format) s->img_fmt = ap->image_format; pstrcpy(s->path, sizeof(s->path), s1->filename); 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; if (!ap->time_base.num) { st->codec->time_base= (AVRational){1,25}; } else { st->codec->time_base= ap->time_base; } if (!s->is_pipe) { if (find_image_range(&first_index, &last_index, s->path) < 0) goto fail; 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 (av_get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0) goto fail; if (url_fopen(f, buf, URL_RDONLY) < 0) goto fail; } else { f = &s1->pb; } ret = av_read_image(f, s1->filename, s->img_fmt, read_header_alloc_cb, s); if (ret < 0) goto fail1; if (!s->is_pipe) { url_fclose(f); } else { url_fseek(f, 0, SEEK_SET); } st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_id = CODEC_ID_RAWVIDEO; st->codec->width = s->width; st->codec->height = s->height; st->codec->pix_fmt = s->pix_fmt; s->img_size = avpicture_get_size(s->pix_fmt, (s->width+15)&(~15), (s->height+15)&(~15)); return 0; fail1: if (!s->is_pipe) url_fclose(f); fail: return AVERROR_IO; } static int read_packet_alloc_cb(void *opaque, AVImageInfo *info) { VideoData *s = opaque; if (info->width != s->width || info->height != s->height) return -1; avpicture_fill(&info->pict, s->ptr, info->pix_fmt, (info->width+15)&(~15), (info->height+15)&(~15)); return 0; } static int img_read_packet(AVFormatContext *s1, AVPacket *pkt) { VideoData *s = s1->priv_data; char filename[1024]; int ret; ByteIOContext f1, *f; 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) return AVERROR_IO; f = &f1; if (url_fopen(f, filename, URL_RDONLY) < 0) return AVERROR_IO; } else { f = &s1->pb; if (url_feof(f)) return AVERROR_IO; } av_new_packet(pkt, s->img_size); pkt->stream_index = 0; s->ptr = pkt->data; ret = av_read_image(f, filename, s->img_fmt, read_packet_alloc_cb, s); if (!s->is_pipe) { url_fclose(f); } if (ret < 0) { av_free_packet(pkt); return AVERROR_IO; /* signal EOF */ } else { /* XXX: computing this pts is not necessary as it is done in the generic code too */ pkt->pts = av_rescale((int64_t)s->img_count * s1->streams[0]->codec->time_base.num, s1->streams[0]->time_base.den, s1->streams[0]->codec->time_base.den) / s1->streams[0]->time_base.num; s->img_count++; s->img_number++; return 0; } } static int img_read_close(AVFormatContext *s1) { return 0; } /******************************************************/ /* image output */ static int img_set_parameters(AVFormatContext *s, AVFormatParameters *ap) { VideoData *img = s->priv_data; AVStream *st; AVImageFormat *img_fmt; int i; /* find output image format */ if (ap->image_format) { img_fmt = ap->image_format; } else { img_fmt = guess_image_format(s->filename); } if (!img_fmt) return -1; if (s->nb_streams != 1) return -1; st = s->streams[0]; /* we select the first matching format */ for(i=0;i<PIX_FMT_NB;i++) { if (img_fmt->supported_pixel_formats & (1 << i)) break; } if (i >= PIX_FMT_NB) return -1; img->img_fmt = img_fmt; img->pix_fmt = i; st->codec->pix_fmt = img->pix_fmt; return 0; } static int img_write_header(AVFormatContext *s) { VideoData *img = s->priv_data; img->img_number = 1; pstrcpy(img->path, sizeof(img->path), s->filename); /* 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; AVStream *st = s->streams[pkt->stream_index]; ByteIOContext pb1, *pb; AVPicture *picture; int width, height, ret; char filename[1024]; AVImageInfo info; width = st->codec->width; height = st->codec->height; picture = (AVPicture *)pkt->data; if (!img->is_pipe) { if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0) return AVERROR_IO; pb = &pb1; if (url_fopen(pb, filename, URL_WRONLY) < 0) return AVERROR_IO; } else { pb = &s->pb; } info.width = width; info.height = height; info.pix_fmt = st->codec->pix_fmt; info.interleaved = 0; /* FIXME: there should be a way to set it right */ info.pict = *picture; ret = av_write_image(pb, img->img_fmt, &info); if (!img->is_pipe) { url_fclose(pb); } img->img_number++; return 0; } static int img_write_trailer(AVFormatContext *s) { return 0; } /* input */ #ifdef CONFIG_IMAGE_DEMUXER AVInputFormat image_demuxer = { "image", "image sequence", sizeof(VideoData), image_probe, img_read_header, img_read_packet, img_read_close, NULL, NULL, AVFMT_NOFILE | AVFMT_NEEDNUMBER, }; #endif #ifdef CONFIG_IMAGEPIPE_DEMUXER AVInputFormat imagepipe_demuxer = { "imagepipe", "piped image sequence", sizeof(VideoData), NULL, /* no probe */ img_read_header, img_read_packet, img_read_close, NULL, }; #endif /* output */ #ifdef CONFIG_IMAGE_MUXER AVOutputFormat image_muxer = { "image", "image sequence", "", "", sizeof(VideoData), CODEC_ID_NONE, CODEC_ID_RAWVIDEO, img_write_header, img_write_packet, img_write_trailer, AVFMT_NOFILE | AVFMT_NEEDNUMBER | AVFMT_RAWPICTURE, img_set_parameters, }; #endif #ifdef CONFIG_IMAGEPIPE_MUXER AVOutputFormat imagepipe_muxer = { "imagepipe", "piped image sequence", "", "", sizeof(VideoData), CODEC_ID_NONE, CODEC_ID_RAWVIDEO, img_write_header, img_write_packet, img_write_trailer, AVFMT_RAWPICTURE, img_set_parameters, }; #endif