static GstFlowReturn
gst_vdp_output_src_pad_create_buffer (GstVdpOutputSrcPad * vdp_pad,
GstVdpOutputBuffer ** output_buf, GError ** error)
{
GstFlowReturn ret;
GstBuffer *neg_buf;
/* negotiate */
ret = gst_pad_alloc_buffer_and_set_caps (GST_PAD_CAST (vdp_pad),
GST_BUFFER_OFFSET_NONE, 0, GST_PAD_CAPS (vdp_pad), &neg_buf);
if (ret == GST_FLOW_OK)
gst_buffer_unref (neg_buf);
*output_buf =
(GstVdpOutputBuffer *) gst_vdp_buffer_pool_get_buffer (vdp_pad->bpool,
error);
if (!*output_buf)
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
/* Buffer management
*
* The buffer_alloc function must either return a buffer with given size and
* caps or create a buffer with different caps attached to the buffer. This
* last option is called reverse negotiation, ie, where the sink suggests a
* different format from the upstream peer.
*
* We try to do reverse negotiation when our geometry changes and we like a
* resized buffer.
*/
static GstFlowReturn
gst_vdp_sink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
VdpSink *vdp_sink;
GstStructure *structure = NULL;
GstFlowReturn ret = GST_FLOW_OK;
gint width, height;
GstCaps *alloc_caps;
gint w_width, w_height;
GError *err;
vdp_sink = GST_VDP_SINK (bsink);
GST_LOG_OBJECT (vdp_sink,
"a buffer of %d bytes was requested with caps %" GST_PTR_FORMAT
" and offset %" G_GUINT64_FORMAT, size, caps, offset);
/* get struct to see what is requested */
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &width) ||
!gst_structure_get_int (structure, "height", &height)) {
GST_WARNING_OBJECT (vdp_sink, "invalid caps for buffer allocation %"
GST_PTR_FORMAT, caps);
ret = GST_FLOW_NOT_NEGOTIATED;
goto beach;
}
alloc_caps = gst_caps_ref (caps);
/* We take the flow_lock because the window might go away */
g_mutex_lock (vdp_sink->flow_lock);
if (!vdp_sink->window) {
g_mutex_unlock (vdp_sink->flow_lock);
goto alloc;
}
/* What is our geometry */
gst_vdp_sink_window_update_geometry (vdp_sink, vdp_sink->window);
w_width = vdp_sink->window->width;
w_height = vdp_sink->window->height;
g_mutex_unlock (vdp_sink->flow_lock);
/* We would like another geometry */
if (width != w_width || height != w_height) {
GstCaps *new_caps, *allowed_caps, *desired_caps;
GstStructure *desired_struct;
/* make a copy of the incomming caps to create the new
* suggestion. We can't use make_writable because we might
* then destroy the original caps which we still need when the
* peer does not accept the suggestion. */
new_caps = gst_caps_copy (caps);
desired_struct = gst_caps_get_structure (new_caps, 0);
GST_DEBUG ("we would love to receive a %dx%d video", w_width, w_height);
gst_structure_set (desired_struct, "width", G_TYPE_INT, w_width, NULL);
gst_structure_set (desired_struct, "height", G_TYPE_INT, w_height, NULL);
allowed_caps = gst_pad_get_caps (GST_BASE_SINK_PAD (vdp_sink));
desired_caps = gst_caps_intersect (new_caps, allowed_caps);
gst_caps_unref (new_caps);
gst_caps_unref (allowed_caps);
/* see if peer accepts our new suggestion, if there is no peer, this
* function returns true. */
if (gst_pad_peer_accept_caps (GST_VIDEO_SINK_PAD (vdp_sink), desired_caps)) {
/* we will not alloc a buffer of the new suggested caps. Make sure
* we also unref this new caps after we set it on the buffer. */
GST_DEBUG ("peer pad accepts our desired caps %" GST_PTR_FORMAT,
desired_caps);
gst_caps_unref (alloc_caps);
alloc_caps = desired_caps;
} else {
GST_DEBUG ("peer pad does not accept our desired caps %" GST_PTR_FORMAT,
desired_caps);
/* we alloc a buffer with the original incomming caps already in the
* width and height variables */
gst_caps_unref (desired_caps);
}
}
alloc:
gst_vdp_buffer_pool_set_caps (vdp_sink->bpool, alloc_caps);
gst_caps_unref (alloc_caps);
err = NULL;
*buf =
GST_BUFFER_CAST (gst_vdp_buffer_pool_get_buffer (vdp_sink->bpool, &err));
if (!*buf) {
gst_vdp_sink_post_error (vdp_sink, err);
return GST_FLOW_ERROR;
}
beach:
return ret;
}
static GstFlowReturn
gst_vdp_vpp_chain (GstPad * pad, GstBuffer * buffer)
{
GstVdpVideoPostProcess *vpp =
GST_VDP_VIDEO_POST_PROCESS (gst_pad_get_parent (pad));
GstClockTime qostime;
GstFlowReturn ret = GST_FLOW_OK;
GError *err;
GST_DEBUG ("chain");
/* can only do QoS if the segment is in TIME */
if (vpp->segment.format != GST_FORMAT_TIME)
goto no_qos;
/* QOS is done on the running time of the buffer, get it now */
qostime = gst_segment_to_running_time (&vpp->segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buffer));
if (qostime != -1) {
gboolean need_skip;
GstClockTime earliest_time;
/* lock for getting the QoS parameters that are set (in a different thread)
* with the QOS events */
GST_OBJECT_LOCK (vpp);
earliest_time = vpp->earliest_time;
/* check for QoS, don't perform conversion for buffers
* that are known to be late. */
need_skip = GST_CLOCK_TIME_IS_VALID (earliest_time) && qostime != -1 &&
qostime <= earliest_time;
GST_OBJECT_UNLOCK (vpp);
if (need_skip) {
GST_DEBUG_OBJECT (vpp, "skipping transform: qostime %"
GST_TIME_FORMAT " <= %" GST_TIME_FORMAT,
GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
/* mark discont for next buffer */
vpp->discont = TRUE;
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
}
no_qos:
if (vpp->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
vpp->discont = FALSE;
}
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
GST_DEBUG_OBJECT (vpp, "Received discont buffer");
gst_vdp_vpp_flush (vpp);
}
if (!vpp->native_input) {
GstVdpVideoBuffer *video_buf;
err = NULL;
video_buf =
(GstVdpVideoBuffer *) gst_vdp_buffer_pool_get_buffer (vpp->vpool, &err);
if (G_UNLIKELY (!video_buf))
goto video_buf_error;
if (!gst_vdp_video_buffer_upload (video_buf, buffer, vpp->fourcc,
vpp->width, vpp->height)) {
gst_buffer_unref (GST_BUFFER (video_buf));
GST_ELEMENT_ERROR (vpp, RESOURCE, READ,
("Couldn't upload YUV data to vdpau"), (NULL));
ret = GST_FLOW_ERROR;
goto error;
}
gst_buffer_copy_metadata (GST_BUFFER (video_buf), buffer,
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
gst_buffer_unref (buffer);
buffer = GST_BUFFER (video_buf);
}
if (G_UNLIKELY (vpp->mixer == VDP_INVALID_HANDLE)) {
ret = gst_vdp_vpp_create_mixer (vpp);
if (ret != GST_FLOW_OK)
goto error;
}
gst_vdp_vpp_add_buffer (vpp, GST_VDP_VIDEO_BUFFER (buffer));
ret = gst_vdp_vpp_drain (vpp);
done:
gst_object_unref (vpp);
return ret;
error:
gst_buffer_unref (buffer);
goto done;
video_buf_error:
gst_buffer_unref (GST_BUFFER (buffer));
gst_vdp_vpp_post_error (vpp, err);
ret = GST_FLOW_ERROR;
goto done;
}
