/**
* gst_video_buffer_get_overlay_composition:
* @buf: a #GstBuffer
*
* Get the overlay composition that has previously been attached to a buffer
* with gst_video_buffer_get_overlay_composition(), usually by another element
* upstream.
*
* Returns: (transfer none): the #GstVideoOverlayComposition attached to
* this buffer, or NULL. Does not return a reference to the composition,
* caller must obtain her own ref via gst_video_overlay_composition_ref()
* if needed.
*
* Since: 0.10.36
*/
GstVideoOverlayComposition *
gst_video_buffer_get_overlay_composition (GstBuffer * buf)
{
const GstStructure *s;
const GValue *val;
s = gst_buffer_get_qdata (buf, GST_OVERLAY_COMPOSITION_QUARK);
if (s == NULL)
return NULL;
val = gst_structure_id_get_value (s, COMPOSITION_QUARK);
if (val == NULL)
return NULL;
return GST_VIDEO_OVERLAY_COMPOSITION (gst_value_get_mini_object (val));
}
bool GStreamerReader::DecodeVideoFrame(bool &aKeyFrameSkip,
int64_t aTimeThreshold)
{
NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
GstBuffer* buffer = nullptr;
int64_t timestamp, nextTimestamp;
while (true)
{
if (!WaitForDecodedData(&mVideoSinkBufferCount)) {
mVideoQueue.Finish();
break;
}
mDecoder->NotifyDecodedFrames(0, 1);
buffer = gst_app_sink_pull_buffer(mVideoAppSink);
bool isKeyframe = !GST_BUFFER_FLAG_IS_SET(buffer, GST_BUFFER_FLAG_DISCONT);
if ((aKeyFrameSkip && !isKeyframe)) {
gst_buffer_unref(buffer);
buffer = nullptr;
continue;
}
timestamp = GST_BUFFER_TIMESTAMP(buffer);
{
ReentrantMonitorAutoEnter mon(mGstThreadsMonitor);
timestamp = gst_segment_to_stream_time(&mVideoSegment,
GST_FORMAT_TIME, timestamp);
}
NS_ASSERTION(GST_CLOCK_TIME_IS_VALID(timestamp),
"frame has invalid timestamp");
timestamp = nextTimestamp = GST_TIME_AS_USECONDS(timestamp);
if (GST_CLOCK_TIME_IS_VALID(GST_BUFFER_DURATION(buffer)))
nextTimestamp += GST_TIME_AS_USECONDS(GST_BUFFER_DURATION(buffer));
else if (fpsNum && fpsDen)
/* add 1-frame duration */
nextTimestamp += gst_util_uint64_scale(GST_USECOND, fpsNum, fpsDen);
if (timestamp < aTimeThreshold) {
LOG(PR_LOG_DEBUG, ("skipping frame %" GST_TIME_FORMAT
" threshold %" GST_TIME_FORMAT,
GST_TIME_ARGS(timestamp), GST_TIME_ARGS(aTimeThreshold)));
gst_buffer_unref(buffer);
buffer = nullptr;
continue;
}
break;
}
if (!buffer)
/* no more frames */
return false;
nsRefPtr<PlanarYCbCrImage> image;
#if GST_VERSION_MICRO >= 36
const GstStructure* structure = gst_buffer_get_qdata(buffer,
g_quark_from_string("moz-reader-data"));
const GValue* value = gst_structure_get_value(structure, "image");
if (value) {
BufferData* data = reinterpret_cast<BufferData*>(g_value_get_boxed(value));
image = data->mImage;
}
#endif
if (!image) {
/* Ugh, upstream is not calling gst_pad_alloc_buffer(). Fallback to
* allocating a PlanarYCbCrImage backed GstBuffer here and memcpy.
*/
GstBuffer* tmp = nullptr;
AllocateVideoBufferFull(nullptr, GST_BUFFER_OFFSET(buffer),
GST_BUFFER_SIZE(buffer), nullptr, &tmp, image);
/* copy */
gst_buffer_copy_metadata(tmp, buffer, (GstBufferCopyFlags)GST_BUFFER_COPY_ALL);
memcpy(GST_BUFFER_DATA(tmp), GST_BUFFER_DATA(buffer),
GST_BUFFER_SIZE(tmp));
gst_buffer_unref(buffer);
buffer = tmp;
}
guint8* data = GST_BUFFER_DATA(buffer);
int width = mPicture.width;
int height = mPicture.height;
GstVideoFormat format = mFormat;
VideoData::YCbCrBuffer b;
for(int i = 0; i < 3; i++) {
b.mPlanes[i].mData = data + gst_video_format_get_component_offset(format, i,
width, height);
b.mPlanes[i].mStride = gst_video_format_get_row_stride(format, i, width);
b.mPlanes[i].mHeight = gst_video_format_get_component_height(format,
i, height);
b.mPlanes[i].mWidth = gst_video_format_get_component_width(format,
i, width);
b.mPlanes[i].mOffset = 0;
b.mPlanes[i].mSkip = 0;
}
bool isKeyframe = !GST_BUFFER_FLAG_IS_SET(buffer,
GST_BUFFER_FLAG_DELTA_UNIT);
/* XXX ? */
int64_t offset = 0;
VideoData* video = VideoData::Create(mInfo, image, offset,
timestamp, nextTimestamp, b,
isKeyframe, -1, mPicture);
mVideoQueue.Push(video);
gst_buffer_unref(buffer);
return true;
}
