C++ (Cpp) gst_base_src_get_do_timestamp Beispiele

Beispiel #1

Datei: gstaravis.c Projekt: daiemna/SDP_WS14

static GstFlowReturn
gst_aravis_create (GstPushSrc * push_src, GstBuffer ** buffer)
{
	GstAravis *gst_aravis;
	ArvBuffer *arv_buffer;
	int arv_row_stride;
	int width, height;
	char *buffer_data;
	size_t buffer_size;
	guint64 timestamp_ns;

	gst_aravis = GST_ARAVIS (push_src);

	do {
		arv_buffer = arv_stream_timeout_pop_buffer (gst_aravis->stream, gst_aravis->buffer_timeout_us);
		if (arv_buffer != NULL && arv_buffer_get_status (arv_buffer) != ARV_BUFFER_STATUS_SUCCESS)
			arv_stream_push_buffer (gst_aravis->stream, arv_buffer);
	} while (arv_buffer != NULL && arv_buffer_get_status (arv_buffer) != ARV_BUFFER_STATUS_SUCCESS);

	if (arv_buffer == NULL)
		return GST_FLOW_ERROR;

	*buffer = gst_buffer_new ();

	buffer_data = (char *) arv_buffer_get_data (arv_buffer, &buffer_size);
	arv_buffer_get_image_region (arv_buffer, NULL, NULL, &width, &height);
	arv_row_stride = width * ARV_PIXEL_FORMAT_BIT_PER_PIXEL (arv_buffer_get_image_pixel_format (arv_buffer)) / 8;
	timestamp_ns = arv_buffer_get_timestamp (arv_buffer);

	/* Gstreamer requires row stride to be a multiple of 4 */
	if ((arv_row_stride & 0x3) != 0) {
		int gst_row_stride;
		size_t size;
		void *data;
		int i;

		gst_row_stride = (arv_row_stride & ~(0x3)) + 4;

		size = height * gst_row_stride;
		data = g_malloc (size);

		for (i = 0; i < height; i++)
			memcpy (((char *) data) + i * gst_row_stride, buffer_data + i * arv_row_stride, arv_row_stride);

		GST_BUFFER_DATA (buffer) = data;
		GST_BUFFER_MALLOCDATA (buffer) = data;
		GST_BUFFER_SIZE (buffer) = size;
	} else {
		GST_BUFFER_DATA (*buffer) = buffer_data;
		GST_BUFFER_MALLOCDATA (*buffer) = NULL;
		GST_BUFFER_SIZE (*buffer) = buffer_size;
	}

	if (!gst_base_src_get_do_timestamp(GST_BASE_SRC(push_src))) {
		if (gst_aravis->timestamp_offset == 0) {
			gst_aravis->timestamp_offset = timestamp_ns;
			gst_aravis->last_timestamp = timestamp_ns;
		}

		GST_BUFFER_TIMESTAMP (*buffer) = timestamp_ns - gst_aravis->timestamp_offset;
		GST_BUFFER_DURATION (*buffer) = timestamp_ns - gst_aravis->last_timestamp;

		gst_aravis->last_timestamp = timestamp_ns;
	}

	arv_stream_push_buffer (gst_aravis->stream, arv_buffer);

	gst_buffer_set_caps (*buffer, gst_aravis->fixed_caps);

	return GST_FLOW_OK;
}

Beispiel #2

Datei: gstaravis.c Projekt: UbiCastTeam/aravis

static GstFlowReturn
gst_aravis_create (GstPushSrc * push_src, GstBuffer ** buffer)
{
	GstAravis *gst_aravis;
	ArvBuffer *arv_buffer;
	int arv_row_stride;

	gst_aravis = GST_ARAVIS (push_src);

	do {
		arv_buffer = arv_stream_timeout_pop_buffer (gst_aravis->stream, gst_aravis->buffer_timeout_us);
		if (arv_buffer != NULL && arv_buffer->status != ARV_BUFFER_STATUS_SUCCESS)
			arv_stream_push_buffer (gst_aravis->stream, arv_buffer);
	} while (arv_buffer != NULL && arv_buffer->status != ARV_BUFFER_STATUS_SUCCESS);

	if (arv_buffer == NULL)
		return GST_FLOW_ERROR;

	arv_row_stride = arv_buffer->width * ARV_PIXEL_FORMAT_BIT_PER_PIXEL (arv_buffer->pixel_format) / 8;

	/* Gstreamer requires row stride to be a multiple of 4 */
	if ((arv_row_stride & 0x3) != 0) {
		int gst_row_stride;
		size_t size;
		void *data;
		int i;

		gst_row_stride = (arv_row_stride & ~(0x3)) + 4;

		size = arv_buffer->height * gst_row_stride;
		data = g_malloc (size);

		for (i = 0; i < arv_buffer->height; i++)
			memcpy (((char *) data) + i * gst_row_stride, ((char *) arv_buffer->data) + i * arv_row_stride, arv_row_stride);

		*buffer = gst_buffer_new_wrapped (data, size);
	} else {
		*buffer = gst_buffer_new_wrapped_full (0,
			arv_buffer->data,
			arv_buffer->size,
			0,
			arv_buffer->size,
			NULL,
			NULL);
	}

	if (!gst_base_src_get_do_timestamp(GST_BASE_SRC(push_src))) {
		if (gst_aravis->timestamp_offset == 0) {
			gst_aravis->timestamp_offset = arv_buffer->timestamp_ns;
			gst_aravis->last_timestamp = arv_buffer->timestamp_ns;
		}

		GST_BUFFER_PTS (*buffer) = arv_buffer->timestamp_ns - gst_aravis->timestamp_offset;
		GST_BUFFER_DURATION (*buffer) = arv_buffer->timestamp_ns - gst_aravis->last_timestamp;

		gst_aravis->last_timestamp = arv_buffer->timestamp_ns;
	}

	arv_stream_push_buffer (gst_aravis->stream, arv_buffer);

	return GST_FLOW_OK;
}