/* 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 (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 (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 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 f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]}; AVCodecContext *codec= &s1->streams[0]->codec; if (!s->is_pipe) { /* loop over input */ if (loop_input && s->img_number > s->img_last) { s->img_number = s->img_first; } if (get_frame_filename(filename, sizeof(filename), s->path, s->img_number)<0 && s->img_number > 1) return AVERROR_IO; for(i=0; i<3; i++){ if (url_fopen(f[i], filename, URL_RDONLY) < 0) return AVERROR_IO; size[i]= url_filesize(url_fileno(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_IO; 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_IO; /* signal EOF */ } else { s->img_count++; s->img_number++; return 0; } }
static int img_write_packet(AVFormatContext *s, AVPacket *pkt) { VideoData *img = s->priv_data; ByteIOContext pb1, *pb; char filename[1024]; if (!img->is_pipe) { if (get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 && img->img_number>1) return AVERROR_IO; pb = &pb1; if (url_fopen(pb, filename, URL_WRONLY) < 0) return AVERROR_IO; } else { pb = &s->pb; } put_buffer(pb, pkt->data, pkt->size); put_flush_packet(pb); if (!img->is_pipe) { url_fclose(pb); } img->img_number++; 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 (loop_input && s->img_number > s->img_last) { s->img_number = s->img_first; }*/ if (get_frame_filename(filename, sizeof(filename), s->path, s->img_number)<0 && s->img_number > 1) 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; } if (s->is_pipe) { av_new_packet(pkt, 4096); }else{ av_new_packet(pkt, url_filesize(url_fileno(f))); } pkt->stream_index = 0; pkt->flags |= PKT_FLAG_KEY; ret = get_buffer(f, pkt->data, pkt->size); if (!s->is_pipe) { url_fclose(f); } if (ret <= 0) { av_free_packet(pkt); return AVERROR_IO; /* signal EOF */ } else { s->img_count++; s->img_number++; 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 (loop_input && s->img_number > s->img_last) { s->img_number = s->img_first; } if (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_write_packet(AVFormatContext *s, AVPacket *pkt) { VideoData *img = s->priv_data; ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]}; char filename[1024]; AVCodecContext *codec= &s->streams[ pkt->stream_index ]->codec; int i; if (!img->is_pipe) { if (get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 && img->img_number>1) return AVERROR_IO; for(i=0; i<3; i++){ if (url_fopen(pb[i], filename, URL_WRONLY) < 0) return AVERROR_IO; 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; }
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 (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_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 (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; }