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/*
* Copyright (C) 2022 Igalia S.L
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "VideoFrameGStreamer.h"
#include "GStreamerCommon.h"
#include "PixelBuffer.h"
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/TypedArrayInlines.h>
#if ENABLE(VIDEO) && USE(GSTREAMER)
namespace WebCore {
static inline void setBufferFields(GstBuffer* buffer, const MediaTime& presentationTime, double frameRate)
{
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_FLAG_LIVE);
GST_BUFFER_DTS(buffer) = GST_BUFFER_PTS(buffer) = toGstClockTime(presentationTime);
GST_BUFFER_DURATION(buffer) = toGstClockTime(1_s / frameRate);
}
Ref<VideoFrameGStreamer> VideoFrameGStreamer::createFromPixelBuffer(Ref<PixelBuffer>&& pixelBuffer, CanvasContentType canvasContentType, Rotation videoRotation, const MediaTime& presentationTime, const IntSize& destinationSize, double frameRate, bool videoMirrored, std::optional<VideoFrameTimeMetadata>&& metadata)
{
ensureGStreamerInitialized();
auto size = pixelBuffer->size();
auto sizeInBytes = pixelBuffer->sizeInBytes();
auto dataBaseAddress = pixelBuffer->bytes();
auto leakedPixelBuffer = &pixelBuffer.leakRef();
auto buffer = adoptGRef(gst_buffer_new_wrapped_full(GST_MEMORY_FLAG_READONLY, dataBaseAddress, sizeInBytes, 0, sizeInBytes, leakedPixelBuffer, [](gpointer userData) {
static_cast<PixelBuffer*>(userData)->deref();
}));
auto width = size.width();
auto height = size.height();
GstVideoFormat format;
switch (canvasContentType) {
case CanvasContentType::WebGL:
format = GST_VIDEO_FORMAT_RGBA;
break;
case CanvasContentType::Canvas2D:
format = GST_VIDEO_FORMAT_BGRA;
break;
}
const char* formatName = gst_video_format_to_string(format);
int frameRateNumerator, frameRateDenominator;
gst_util_double_to_fraction(frameRate, &frameRateNumerator, &frameRateDenominator);
auto caps = adoptGRef(gst_caps_new_simple("video/x-raw", "format", G_TYPE_STRING, formatName, "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, "framerate", GST_TYPE_FRACTION, frameRateNumerator, frameRateDenominator, nullptr));
GRefPtr<GstSample> sample;
// Optionally resize the video frame to fit destinationSize. This code path is used mostly by
// the mock realtime video source when the gUM constraints specifically required exact width
// and/or height values.
if (!destinationSize.isZero() && size != destinationSize) {
GstVideoInfo inputInfo;
gst_video_info_from_caps(&inputInfo, caps.get());
width = destinationSize.width();
height = destinationSize.height();
auto outputCaps = adoptGRef(gst_caps_new_simple("video/x-raw", "format", G_TYPE_STRING, formatName, "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, "framerate", GST_TYPE_FRACTION, frameRateNumerator, frameRateDenominator, nullptr));
GstVideoInfo outputInfo;
gst_video_info_from_caps(&outputInfo, outputCaps.get());
auto outputBuffer = adoptGRef(gst_buffer_new_allocate(nullptr, GST_VIDEO_INFO_SIZE(&outputInfo), nullptr));
{
GUniquePtr<GstVideoConverter> converter(gst_video_converter_new(&inputInfo, &outputInfo, nullptr));
GstMappedFrame inputFrame(buffer.get(), inputInfo, GST_MAP_READ);
GstMappedFrame outputFrame(outputBuffer.get(), outputInfo, GST_MAP_WRITE);
gst_video_converter_frame(converter.get(), inputFrame.get(), outputFrame.get());
}
if (metadata)
webkitGstBufferSetVideoFrameTimeMetadata(outputBuffer.get(), *metadata);
setBufferFields(outputBuffer.get(), presentationTime, frameRate);
sample = adoptGRef(gst_sample_new(outputBuffer.get(), outputCaps.get(), nullptr, nullptr));
} else {
if (metadata)
buffer = webkitGstBufferSetVideoFrameTimeMetadata(buffer.get(), *metadata);
setBufferFields(buffer.get(), presentationTime, frameRate);
sample = adoptGRef(gst_sample_new(buffer.get(), caps.get(), nullptr, nullptr));
}
return adoptRef(*new VideoFrameGStreamer(WTFMove(sample), FloatSize(width, height), presentationTime, videoRotation, videoMirrored, WTFMove(metadata)));
}
VideoFrameGStreamer::VideoFrameGStreamer(GRefPtr<GstSample>&& sample, const FloatSize& presentationSize, const MediaTime& presentationTime, Rotation videoRotation, bool videoMirrored, std::optional<VideoFrameTimeMetadata>&& metadata)
: VideoFrame(presentationTime, videoMirrored, videoRotation)
, m_sample(WTFMove(sample))
, m_presentationSize(presentationSize)
{
ASSERT(m_sample);
GstBuffer* buffer = gst_sample_get_buffer(m_sample.get());
RELEASE_ASSERT(buffer);
if (metadata)
buffer = webkitGstBufferSetVideoFrameTimeMetadata(buffer, WTFMove(metadata));
}
VideoFrameGStreamer::VideoFrameGStreamer(const GRefPtr<GstSample>& sample, const MediaTime& presentationTime, Rotation videoRotation)
: VideoFrame(presentationTime, false, videoRotation)
, m_sample(sample)
{
}
RefPtr<VideoFrameGStreamer> VideoFrameGStreamer::resizeTo(const IntSize& destinationSize)
{
auto* caps = gst_sample_get_caps(m_sample.get());
const auto* structure = gst_caps_get_structure(caps, 0);
int frameRateNumerator, frameRateDenominator;
if (!gst_structure_get_fraction(structure, "framerate", &frameRateNumerator, &frameRateDenominator)) {
frameRateNumerator = 1;
frameRateDenominator = 1;
}
GstVideoInfo inputInfo;
gst_video_info_from_caps(&inputInfo, caps);
auto format = GST_VIDEO_INFO_FORMAT(&inputInfo);
auto width = destinationSize.width();
auto height = destinationSize.height();
auto outputCaps = adoptGRef(gst_caps_new_simple("video/x-raw", "format", G_TYPE_STRING, gst_video_format_to_string(format), "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, "framerate", GST_TYPE_FRACTION, frameRateNumerator, frameRateDenominator, nullptr));
GstVideoInfo outputInfo;
gst_video_info_from_caps(&outputInfo, outputCaps.get());
auto* buffer = gst_sample_get_buffer(m_sample.get());
auto outputBuffer = adoptGRef(gst_buffer_new_allocate(nullptr, GST_VIDEO_INFO_SIZE(&outputInfo), nullptr));
{
GUniquePtr<GstVideoConverter> converter(gst_video_converter_new(&inputInfo, &outputInfo, nullptr));
GstMappedFrame inputFrame(buffer, inputInfo, GST_MAP_READ);
GstMappedFrame outputFrame(outputBuffer.get(), outputInfo, GST_MAP_WRITE);
gst_video_converter_frame(converter.get(), inputFrame.get(), outputFrame.get());
}
double frameRate;
gst_util_fraction_to_double(frameRateNumerator, frameRateDenominator, &frameRate);
auto presentationTime = this->presentationTime();
setBufferFields(outputBuffer.get(), presentationTime, frameRate);
auto sample = adoptGRef(gst_sample_new(outputBuffer.get(), outputCaps.get(), nullptr, nullptr));
return VideoFrameGStreamer::create(WTFMove(sample), destinationSize, presentationTime, rotation(), isMirrored());
}
RefPtr<JSC::Uint8ClampedArray> VideoFrameGStreamer::computeRGBAImageData() const
{
auto* caps = gst_sample_get_caps(m_sample.get());
GstVideoInfo inputInfo;
if (!gst_video_info_from_caps(&inputInfo, caps))
return nullptr;
// We could check the input format is RGBA before attempting a conversion, but it is very
// unlikely to pay off. The input format is likely to be BGRA (when the samples are created as a
// result of mediastream captureStream) or some YUV format if the sample is from a video capture
// device. This method is called only by internals during layout tests, it is thus not critical
// to optimize this code path.
auto outputCaps = adoptGRef(gst_caps_copy(caps));
gst_caps_set_simple(outputCaps.get(), "format", G_TYPE_STRING, "RGBA", nullptr);
GstVideoInfo outputInfo;
if (!gst_video_info_from_caps(&outputInfo, outputCaps.get()))
return nullptr;
int width = GST_VIDEO_INFO_WIDTH(&inputInfo);
int height = GST_VIDEO_INFO_HEIGHT(&inputInfo);
unsigned byteLength = GST_VIDEO_INFO_SIZE(&inputInfo);
auto bufferStorage = JSC::ArrayBuffer::create(width * height, 4);
auto outputBuffer = adoptGRef(gst_buffer_new_wrapped_full(GST_MEMORY_FLAG_NO_SHARE, bufferStorage->data(), byteLength, 0, byteLength, nullptr, [](gpointer) { }));
GstMappedFrame outputFrame(outputBuffer.get(), outputInfo, GST_MAP_WRITE);
GUniquePtr<GstVideoConverter> converter(gst_video_converter_new(&inputInfo, &outputInfo, nullptr));
GstMappedFrame inputFrame(gst_sample_get_buffer(m_sample.get()), inputInfo, GST_MAP_READ);
gst_video_converter_frame(converter.get(), inputFrame.get(), outputFrame.get());
return JSC::Uint8ClampedArray::tryCreate(WTFMove(bufferStorage), 0, byteLength);
}
} // namespace WebCore
#endif // ENABLE(VIDEO) && USE(GSTREAMER)
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