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