зеркало из https://github.com/mozilla/gecko-dev.git
91 строка
3.4 KiB
C++
91 строка
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et ft=cpp : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "VideoFrameUtils.h"
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#include "webrtc/api/video/video_frame.h"
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#include "mozilla/ShmemPool.h"
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namespace mozilla {
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uint32_t VideoFrameUtils::TotalRequiredBufferSize(
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const webrtc::VideoFrame& aVideoFrame) {
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auto i420 = aVideoFrame.video_frame_buffer()->ToI420();
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auto height = i420->height();
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size_t size = height * i420->StrideY() +
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((height + 1) / 2) * i420->StrideU() +
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((height + 1) / 2) * i420->StrideV();
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MOZ_RELEASE_ASSERT(size < std::numeric_limits<uint32_t>::max());
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return static_cast<uint32_t>(size);
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}
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void VideoFrameUtils::InitFrameBufferProperties(
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const webrtc::VideoFrame& aVideoFrame,
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camera::VideoFrameProperties& aDestProps) {
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// The VideoFrameBuffer image data stored in the accompanying buffer
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// the buffer is at least this size of larger.
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aDestProps.bufferSize() = TotalRequiredBufferSize(aVideoFrame);
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aDestProps.timeStamp() = aVideoFrame.timestamp();
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aDestProps.ntpTimeMs() = aVideoFrame.ntp_time_ms();
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aDestProps.renderTimeMs() = aVideoFrame.render_time_ms();
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aDestProps.rotation() = aVideoFrame.rotation();
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auto i420 = aVideoFrame.video_frame_buffer()->ToI420();
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auto height = i420->height();
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aDestProps.yAllocatedSize() = height * i420->StrideY();
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aDestProps.uAllocatedSize() = ((height + 1) / 2) * i420->StrideU();
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aDestProps.vAllocatedSize() = ((height + 1) / 2) * i420->StrideV();
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aDestProps.width() = i420->width();
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aDestProps.height() = height;
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aDestProps.yStride() = i420->StrideY();
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aDestProps.uStride() = i420->StrideU();
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aDestProps.vStride() = i420->StrideV();
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}
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void VideoFrameUtils::CopyVideoFrameBuffers(uint8_t* aDestBuffer,
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const size_t aDestBufferSize,
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const webrtc::VideoFrame& aFrame) {
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size_t aggregateSize = TotalRequiredBufferSize(aFrame);
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MOZ_ASSERT(aDestBufferSize >= aggregateSize);
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auto i420 = aFrame.video_frame_buffer()->ToI420();
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// If planes are ordered YUV and contiguous then do a single copy
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if ((i420->DataY() != nullptr) &&
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// Check that the three planes are ordered
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(i420->DataY() < i420->DataU()) && (i420->DataU() < i420->DataV()) &&
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// Check that the last plane ends at firstPlane[totalsize]
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(&i420->DataY()[aggregateSize] ==
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&i420->DataV()[((i420->height() + 1) / 2) * i420->StrideV()])) {
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memcpy(aDestBuffer, i420->DataY(), aggregateSize);
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return;
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}
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// Copy each plane
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size_t offset = 0;
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size_t size;
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auto height = i420->height();
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size = height * i420->StrideY();
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memcpy(&aDestBuffer[offset], i420->DataY(), size);
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offset += size;
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size = ((height + 1) / 2) * i420->StrideU();
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memcpy(&aDestBuffer[offset], i420->DataU(), size);
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offset += size;
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size = ((height + 1) / 2) * i420->StrideV();
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memcpy(&aDestBuffer[offset], i420->DataV(), size);
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}
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void VideoFrameUtils::CopyVideoFrameBuffers(
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ShmemBuffer& aDestShmem, const webrtc::VideoFrame& aVideoFrame) {
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CopyVideoFrameBuffers(aDestShmem.Get().get<uint8_t>(),
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aDestShmem.Get().Size<uint8_t>(), aVideoFrame);
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}
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} // namespace mozilla
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