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/*
* Copyright (C) 2024 Igalia S.L
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ImageGStreamer.h"
#if ENABLE(VIDEO) && USE(GSTREAMER) && USE(SKIA)
#include "NotImplemented.h"
#include <skia/ColorSpaceSkia.h>
#include <skia/core/SkImage.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <skia/core/SkPixmap.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
namespace WebCore {
ImageGStreamer::ImageGStreamer(GRefPtr<GstSample>&& sample)
: m_sample(WTFMove(sample))
{
GstBuffer* buffer = gst_sample_get_buffer(m_sample.get());
if (UNLIKELY(!GST_IS_BUFFER(buffer)))
return;
GstMappedFrame videoFrame(m_sample, GST_MAP_READ);
if (!videoFrame)
return;
auto* videoInfo = videoFrame.info();
// The frame has to be RGB so we can paint it.
ASSERT(GST_VIDEO_INFO_IS_RGB(videoInfo));
// The video buffer may have these formats in these cases:
// { BGRx, BGRA } on little endian
// { xRGB, ARGB } on big endian:
// { RGBx, RGBA }
SkColorType colorType = kUnknown_SkColorType;
SkAlphaType alphaType = kUnknown_SkAlphaType;
switch (videoFrame.format()) {
case GST_VIDEO_FORMAT_BGRx:
colorType = kBGRA_8888_SkColorType;
alphaType = kOpaque_SkAlphaType;
break;
case GST_VIDEO_FORMAT_BGRA:
colorType = kBGRA_8888_SkColorType;
alphaType = kUnpremul_SkAlphaType;
break;
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ARGB:
// FIXME: we need a conversion here.
notImplemented();
return;
case GST_VIDEO_FORMAT_RGBx:
colorType = kRGB_888x_SkColorType;
alphaType = kOpaque_SkAlphaType;
break;
case GST_VIDEO_FORMAT_RGBA:
colorType = kRGBA_8888_SkColorType;
alphaType = kUnpremul_SkAlphaType;
break;
default:
ASSERT_NOT_REACHED();
break;
}
m_size = { static_cast<float>(videoFrame.width()), static_cast<float>(videoFrame.height()) };
auto toSkiaColorSpace = [](const PlatformVideoColorSpace& videoColorSpace) {
// Only valid, full-range RGB spaces are supported.
if (!videoColorSpace.primaries || !videoColorSpace.transfer || !videoColorSpace.matrix || !videoColorSpace.fullRange)
return sk_sp<SkColorSpace>();
const auto& matrix = *videoColorSpace.matrix;
if (matrix != PlatformVideoMatrixCoefficients::Rgb || !*videoColorSpace.fullRange)
return sk_sp<SkColorSpace>();
const auto& primaries = *videoColorSpace.primaries;
const auto& transfer = *videoColorSpace.transfer;
if (primaries == PlatformVideoColorPrimaries::Bt709) {
if (transfer == PlatformVideoTransferCharacteristics::Iec6196621)
return SkColorSpace::MakeSRGB();
if (transfer == PlatformVideoTransferCharacteristics::Linear)
return SkColorSpace::MakeSRGBLinear();
}
skcms_TransferFunction transferFunction = SkNamedTransferFn::kSRGB;
switch (transfer) {
case PlatformVideoTransferCharacteristics::Iec6196621:
break;
case PlatformVideoTransferCharacteristics::Linear:
transferFunction = SkNamedTransferFn::kLinear;
break;
case PlatformVideoTransferCharacteristics::Bt2020_10bit:
case PlatformVideoTransferCharacteristics::Bt2020_12bit:
transferFunction = SkNamedTransferFn::kRec2020;
break;
case PlatformVideoTransferCharacteristics::PQ:
transferFunction = SkNamedTransferFn::kPQ;
break;
case PlatformVideoTransferCharacteristics::HLG:
transferFunction = SkNamedTransferFn::kHLG;
break;
default:
// No known conversion to skia's skcms_TransferFunction - falling back to kSRGB.
break;
}
skcms_Matrix3x3 gamut = SkNamedGamut::kSRGB;
switch (primaries) {
case PlatformVideoColorPrimaries::Bt709:
break;
case PlatformVideoColorPrimaries::Bt2020:
gamut = SkNamedGamut::kRec2020;
break;
case PlatformVideoColorPrimaries::Smpte432:
gamut = SkNamedGamut::kDisplayP3;
break;
default:
// No known conversion to skia's skcms_Matrix3x3 - falling back to kSRGB.
break;
}
return SkColorSpace::MakeRGB(transferFunction, gamut);
};
auto imageInfo = SkImageInfo::Make(videoFrame.width(), videoFrame.height(), colorType, alphaType, toSkiaColorSpace(videoColorSpaceFromInfo(*videoInfo)));
// Copy the buffer data. Keeping the whole mapped GstVideoFrame alive would increase memory
// pressure and the file descriptor(s) associated with the buffer pool open. We only need the
// data here.
SkPixmap pixmap(imageInfo, videoFrame.planeData(0), videoFrame.planeStride(0));
m_image = SkImages::RasterFromPixmapCopy(pixmap);
if (auto* cropMeta = gst_buffer_get_video_crop_meta(buffer))
m_cropRect = FloatRect(cropMeta->x, cropMeta->y, cropMeta->width, cropMeta->height);
}
ImageGStreamer::~ImageGStreamer() = default;
} // namespace WebCore
#endif // ENABLE(VIDEO) && USE(GSTREAMER) && USE(SKIA)
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