static inline int dc1394_read_common(AVFormatContext *c, AVFormatParameters *ap, struct dc1394_frame_format **select_fmt, struct dc1394_frame_rate **select_fps) { dc1394_data* dc1394 = c->priv_data; AVStream* vst; struct dc1394_frame_format *fmt; struct dc1394_frame_rate *fps; enum PixelFormat pix_fmt; int width, height; AVRational framerate; int ret = 0; if ((pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == PIX_FMT_NONE) { av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format); ret = AVERROR(EINVAL); goto out; } if ((ret = av_parse_video_size(&width, &height, dc1394->video_size)) < 0) { av_log(c, AV_LOG_ERROR, "Couldn't parse video size.\n"); goto out; } if ((ret = av_parse_video_rate(&framerate, dc1394->framerate)) < 0) { av_log(c, AV_LOG_ERROR, "Couldn't parse framerate.\n"); goto out; } #if FF_API_FORMAT_PARAMETERS if (ap->width > 0) width = ap->width; if (ap->height > 0) height = ap->height; if (ap->pix_fmt) pix_fmt = ap->pix_fmt; if (ap->time_base.num) framerate = (AVRational){ap->time_base.den, ap->time_base.num}; #endif dc1394->frame_rate = av_rescale(1000, framerate.num, framerate.den); for (fmt = dc1394_frame_formats; fmt->width; fmt++) if (fmt->pix_fmt == pix_fmt && fmt->width == width && fmt->height == height) break; for (fps = dc1394_frame_rates; fps->frame_rate; fps++) if (fps->frame_rate == dc1394->frame_rate) break; if (!fps->frame_rate || !fmt->width) { av_log(c, AV_LOG_ERROR, "Can't find matching camera format for %s, %dx%d@%d:1000fps\n", av_get_pix_fmt_name(pix_fmt), width, height, dc1394->frame_rate); ret = AVERROR(EINVAL); goto out; } /* create a video stream */ vst = av_new_stream(c, 0); if (!vst) { ret = AVERROR(ENOMEM); goto out; } av_set_pts_info(vst, 64, 1, 1000); vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; vst->codec->codec_id = CODEC_ID_RAWVIDEO; vst->codec->time_base.den = framerate.num; vst->codec->time_base.num = framerate.den; vst->codec->width = fmt->width; vst->codec->height = fmt->height; vst->codec->pix_fmt = fmt->pix_fmt; /* packet init */ av_init_packet(&dc1394->packet); dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height); dc1394->packet.stream_index = vst->index; dc1394->packet.flags |= AV_PKT_FLAG_KEY; dc1394->current_frame = 0; vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000); *select_fps = fps; *select_fmt = fmt; out: return ret; }