зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
3.3 KiB
C++
93 строки
3.3 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/video_frame.h"
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#include "mozilla/ShmemPool.h"
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namespace mozilla {
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size_t
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VideoFrameUtils::TotalRequiredBufferSize(
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const webrtc::VideoFrame& aVideoFrame)
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{
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static const webrtc::PlaneType kPlanes[] =
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{webrtc::kYPlane, webrtc::kUPlane, webrtc::kVPlane};
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if (aVideoFrame.IsZeroSize()) {
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return 0;
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}
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size_t sum = 0;
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for (auto plane : kPlanes) {
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sum += aVideoFrame.allocated_size(plane);
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}
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return sum;
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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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{
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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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aDestProps.yAllocatedSize() = aVideoFrame.allocated_size(webrtc::kYPlane);
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aDestProps.uAllocatedSize() = aVideoFrame.allocated_size(webrtc::kYPlane);
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aDestProps.vAllocatedSize() = aVideoFrame.allocated_size(webrtc::kYPlane);
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aDestProps.width() = aVideoFrame.width();
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aDestProps.height() = aVideoFrame.height();
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aDestProps.yStride() = aVideoFrame.stride(webrtc::kYPlane);
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aDestProps.uStride() = aVideoFrame.stride(webrtc::kUPlane);
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aDestProps.vStride() = aVideoFrame.stride(webrtc::kVPlane);
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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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{
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static const webrtc::PlaneType planes[] = {webrtc::kYPlane, webrtc::kUPlane, webrtc::kVPlane};
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size_t aggregateSize = TotalRequiredBufferSize(aFrame);
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MOZ_ASSERT(aDestBufferSize >= aggregateSize);
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// If planes are ordered YUV and contiguous then do a single copy
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if ((aFrame.buffer(webrtc::kYPlane) != nullptr)
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// Check that the three planes are ordered
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&& (aFrame.buffer(webrtc::kYPlane) < aFrame.buffer(webrtc::kUPlane))
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&& (aFrame.buffer(webrtc::kUPlane) < aFrame.buffer(webrtc::kVPlane))
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// Check that the last plane ends at firstPlane[totalsize]
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&& (&aFrame.buffer(webrtc::kYPlane)[aggregateSize] == &aFrame.buffer(webrtc::kVPlane)[aFrame.allocated_size(webrtc::kVPlane)]))
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{
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memcpy(aDestBuffer,aFrame.buffer(webrtc::kYPlane),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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for (auto plane: planes) {
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memcpy(&aDestBuffer[offset], aFrame.buffer(plane), aFrame.allocated_size(plane));
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offset += aFrame.allocated_size(plane);
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}
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}
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void VideoFrameUtils::CopyVideoFrameBuffers(ShmemBuffer& aDestShmem,
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const webrtc::VideoFrame& aVideoFrame)
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{
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CopyVideoFrameBuffers(aDestShmem.Get().get<uint8_t>(), aDestShmem.Get().Size<uint8_t>(), aVideoFrame);
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}
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}
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