static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap) { dc1394_data* dc1394 = c->priv_data; AVStream* vst; nodeid_t* camera_nodes; int res; struct dc1394_frame_format *fmt; struct dc1394_frame_rate *fps; for (fmt = dc1394_frame_formats; fmt->width; fmt++) if (fmt->pix_fmt == ap->pix_fmt && fmt->width == ap->width && fmt->height == ap->height) break; for (fps = dc1394_frame_rates; fps->frame_rate; fps++) if (fps->frame_rate == av_rescale(1000, ap->time_base.den, ap->time_base.num)) break; /* create a video stream */ vst = av_new_stream(c, 0); if (!vst) return -1; av_set_pts_info(vst, 64, 1, 1000); vst->codec->codec_type = CODEC_TYPE_VIDEO; vst->codec->codec_id = CODEC_ID_RAWVIDEO; vst->codec->time_base.den = fps->frame_rate; vst->codec->time_base.num = 1000; 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 |= PKT_FLAG_KEY; dc1394->current_frame = 0; dc1394->fps = fps->frame_rate; vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000); /* Now lets prep the hardware */ dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */ if (!dc1394->handle) { av_log(c, AV_LOG_ERROR, "Can't acquire dc1394 handle on port %d\n", 0 /* ap->port */); goto out; } camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1); if (!camera_nodes || camera_nodes[ap->channel] == DC1394_NO_CAMERA) { av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", ap->channel); goto out_handle; } res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[ap->channel], 0, FORMAT_VGA_NONCOMPRESSED, fmt->frame_size_id, SPEED_400, fps->frame_rate_id, 8, 1, c->filename, &dc1394->camera); dc1394_free_camera_nodes(camera_nodes); if (res != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n"); goto out_handle; } res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node); if (res != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n"); goto out_handle_dma; } return 0; out_handle_dma: dc1394_dma_unlisten(dc1394->handle, &dc1394->camera); dc1394_dma_release_camera(dc1394->handle, &dc1394->camera); out_handle: dc1394_destroy_handle(dc1394->handle); out: return -1; }