static GstFlowReturn webkitVideoSinkRender(GstBaseSink* baseSink, GstBuffer* buffer)
{
WebKitVideoSink* sink = WEBKIT_VIDEO_SINK(baseSink);
WebKitVideoSinkPrivate* priv = sink->priv;
g_mutex_lock(priv->bufferMutex);
if (priv->unlocked) {
g_mutex_unlock(priv->bufferMutex);
return GST_FLOW_OK;
}
#if USE(NATIVE_FULLSCREEN_VIDEO)
// Ignore buffers if the video is already in fullscreen using
// another sink.
if (priv->gstGWorld->isFullscreen()) {
g_mutex_unlock(priv->bufferMutex);
return GST_FLOW_OK;
}
#endif
priv->buffer = gst_buffer_ref(buffer);
#ifndef GST_API_VERSION_1
// For the unlikely case where the buffer has no caps, the caps
// are implicitely the caps of the pad. This shouldn't happen.
if (UNLIKELY(!GST_BUFFER_CAPS(buffer))) {
buffer = priv->buffer = gst_buffer_make_metadata_writable(priv->buffer);
gst_buffer_set_caps(priv->buffer, GST_PAD_CAPS(GST_BASE_SINK_PAD(baseSink)));
}
GRefPtr<GstCaps> caps = GST_BUFFER_CAPS(buffer);
#else
GRefPtr<GstCaps> caps;
// The video info structure is valid only if the sink handled an allocation query.
if (GST_VIDEO_INFO_FORMAT(&priv->info) != GST_VIDEO_FORMAT_UNKNOWN)
caps = adoptGRef(gst_video_info_to_caps(&priv->info));
else
caps = priv->currentCaps;
#endif
GstVideoFormat format;
WebCore::IntSize size;
int pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride;
if (!getVideoSizeAndFormatFromCaps(caps.get(), size, format, pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride)) {
gst_buffer_unref(buffer);
g_mutex_unlock(priv->bufferMutex);
return GST_FLOW_ERROR;
}
// Cairo's ARGB has pre-multiplied alpha while GStreamer's doesn't.
// Here we convert to Cairo's ARGB.
if (format == GST_VIDEO_FORMAT_ARGB || format == GST_VIDEO_FORMAT_BGRA) {
// Because GstBaseSink::render() only owns the buffer reference in the
// method scope we can't use gst_buffer_make_writable() here. Also
// The buffer content should not be changed here because the same buffer
// could be passed multiple times to this method (in theory).
GstBuffer* newBuffer = createGstBuffer(buffer);
// Check if allocation failed.
if (UNLIKELY(!newBuffer)) {
g_mutex_unlock(priv->bufferMutex);
return GST_FLOW_ERROR;
}
// We don't use Color::premultipliedARGBFromColor() here because
// one function call per video pixel is just too expensive:
// For 720p/PAL for example this means 1280*720*25=23040000
// function calls per second!
#ifndef GST_API_VERSION_1
const guint8* source = GST_BUFFER_DATA(buffer);
guint8* destination = GST_BUFFER_DATA(newBuffer);
#else
GstMapInfo sourceInfo;
GstMapInfo destinationInfo;
gst_buffer_map(buffer, &sourceInfo, GST_MAP_READ);
const guint8* source = const_cast<guint8*>(sourceInfo.data);
gst_buffer_map(newBuffer, &destinationInfo, GST_MAP_WRITE);
guint8* destination = static_cast<guint8*>(destinationInfo.data);
#endif
for (int x = 0; x < size.height(); x++) {
for (int y = 0; y < size.width(); y++) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
unsigned short alpha = source[3];
destination[0] = (source[0] * alpha + 128) / 255;
destination[1] = (source[1] * alpha + 128) / 255;
destination[2] = (source[2] * alpha + 128) / 255;
destination[3] = alpha;
#else
unsigned short alpha = source[0];
destination[0] = alpha;
destination[1] = (source[1] * alpha + 128) / 255;
destination[2] = (source[2] * alpha + 128) / 255;
destination[3] = (source[3] * alpha + 128) / 255;
#endif
source += 4;
destination += 4;
}
}
#ifdef GST_API_VERSION_1
gst_buffer_unmap(buffer, &sourceInfo);
gst_buffer_unmap(newBuffer, &destinationInfo);
#endif
gst_buffer_unref(buffer);
buffer = priv->buffer = newBuffer;
}
// This should likely use a lower priority, but glib currently starves
// lower priority sources.
// See: https://bugzilla.gnome.org/show_bug.cgi?id=610830.
priv->timeoutId = g_timeout_add_full(G_PRIORITY_DEFAULT, 0, webkitVideoSinkTimeoutCallback,
gst_object_ref(sink), reinterpret_cast<GDestroyNotify>(gst_object_unref));
g_cond_wait(priv->dataCondition, priv->bufferMutex);
g_mutex_unlock(priv->bufferMutex);
return GST_FLOW_OK;
}
static GstFlowReturn webkitVideoSinkRender(GstBaseSink* baseSink, GstBuffer* buffer)
{
WebKitVideoSink* sink = WEBKIT_VIDEO_SINK(baseSink);
WebKitVideoSinkPrivate* priv = sink->priv;
g_mutex_lock(&priv->bufferMutex);
if (priv->unlocked) {
g_mutex_unlock(&priv->bufferMutex);
return GST_FLOW_OK;
}
priv->buffer = gst_buffer_ref(buffer);
GstCaps* caps;
// The video info structure is valid only if the sink handled an allocation query.
if (GST_VIDEO_INFO_FORMAT(&priv->info) != GST_VIDEO_FORMAT_UNKNOWN)
caps = gst_video_info_to_caps(&priv->info);
else
caps = priv->currentCaps;
GstVideoFormat format;
IntSize size;
int pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride;
if (!getVideoSizeAndFormatFromCaps(caps, &size, &format, &pixelAspectRatioNumerator, &pixelAspectRatioDenominator, &stride)) {
gst_caps_unref(caps);
gst_buffer_unref(buffer);
g_mutex_unlock(&priv->bufferMutex);
return GST_FLOW_ERROR;
}
gst_caps_unref(caps);
// Cairo's ARGB has pre-multiplied alpha while GStreamer's doesn't.
// Here we convert to Cairo's ARGB.
if (format == GST_VIDEO_FORMAT_ARGB || format == GST_VIDEO_FORMAT_BGRA) {
// Because GstBaseSink::render() only owns the buffer reference in the
// method scope we can't use gst_buffer_make_writable() here. Also
// The buffer content should not be changed here because the same buffer
// could be passed multiple times to this method (in theory).
GstBuffer* newBuffer = createGstBuffer(buffer);
// Check if allocation failed.
if (G_UNLIKELY(!newBuffer)) {
g_mutex_unlock(&priv->bufferMutex);
return GST_FLOW_ERROR;
}
// We don't use Color::premultipliedARGBFromColor() here because
// one function call per video pixel is just too expensive:
// For 720p/PAL for example this means 1280*720*25=23040000
// function calls per second!
GstMapInfo sourceInfo;
GstMapInfo destinationInfo;
gst_buffer_map(buffer, &sourceInfo, GST_MAP_READ);
const guint8* source = sourceInfo.data;
gst_buffer_map(newBuffer, &destinationInfo, GST_MAP_WRITE);
guint8* destination = destinationInfo.data;
for (int x = 0; x < size.Height; x++) {
for (int y = 0; y < size.Width; y++) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
unsigned short alpha = source[3];
destination[0] = (source[0] * alpha + 128) / 255;
destination[1] = (source[1] * alpha + 128) / 255;
destination[2] = (source[2] * alpha + 128) / 255;
destination[3] = alpha;
#else
unsigned short alpha = source[0];
destination[0] = alpha;
destination[1] = (source[1] * alpha + 128) / 255;
destination[2] = (source[2] * alpha + 128) / 255;
destination[3] = (source[3] * alpha + 128) / 255;
#endif
source += 4;
destination += 4;
}
}
gst_buffer_unmap(buffer, &sourceInfo);
gst_buffer_unmap(newBuffer, &destinationInfo);
gst_buffer_unref(buffer);
buffer = priv->buffer = newBuffer;
}
// This should likely use a lower priority, but glib currently starves
// lower priority sources.
// See: https://bugzilla.gnome.org/show_bug.cgi?id=610830.
priv->timeoutId = g_timeout_add_full(G_PRIORITY_DEFAULT, 0, webkitVideoSinkTimeoutCallback,
gst_object_ref(sink), (GDestroyNotify) gst_object_unref);
g_source_set_name_by_id(priv->timeoutId, "[WebKit] webkitVideoSinkTimeoutCallback");
if (!priv->silent)
print_buffer_metadata(sink, buffer);
g_cond_wait(&priv->dataCondition, &priv->bufferMutex);
g_mutex_unlock(&priv->bufferMutex);
return GST_FLOW_OK;
}
