зеркало из https://github.com/mozilla/gecko-dev.git
183 строки
4.3 KiB
C++
183 строки
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GMPVideoPlaneImpl.h"
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#include "mozilla/gmp/GMPTypes.h"
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#include "GMPVideoHost.h"
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#include "GMPSharedMemManager.h"
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namespace mozilla {
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namespace gmp {
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GMPPlaneImpl::GMPPlaneImpl(GMPVideoHostImpl* aHost)
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: mSize(0), mStride(0), mHost(aHost) {
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MOZ_ASSERT(mHost);
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mHost->PlaneCreated(this);
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}
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GMPPlaneImpl::GMPPlaneImpl(const GMPPlaneData& aPlaneData,
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GMPVideoHostImpl* aHost)
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: mBuffer(aPlaneData.mBuffer()),
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mSize(aPlaneData.mSize()),
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mStride(aPlaneData.mStride()),
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mHost(aHost) {
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MOZ_ASSERT(mHost);
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mHost->PlaneCreated(this);
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}
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GMPPlaneImpl::~GMPPlaneImpl() {
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DestroyBuffer();
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if (mHost) {
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mHost->PlaneDestroyed(this);
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}
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}
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void GMPPlaneImpl::DoneWithAPI() {
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DestroyBuffer();
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// Do this after destroying the buffer because destruction
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// involves deallocation, which requires a host.
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mHost = nullptr;
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}
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void GMPPlaneImpl::ActorDestroyed() {
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// Simply clear out Shmem reference, do not attempt to
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// properly free it. It has already been freed.
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mBuffer = ipc::Shmem();
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// No more host.
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mHost = nullptr;
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}
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bool GMPPlaneImpl::InitPlaneData(GMPPlaneData& aPlaneData) {
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aPlaneData.mBuffer() = mBuffer;
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aPlaneData.mSize() = mSize;
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aPlaneData.mStride() = mStride;
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// This method is called right before Shmem is sent to another process.
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// We need to effectively zero out our member copy so that we don't
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// try to delete memory we don't own later.
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mBuffer = ipc::Shmem();
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return true;
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}
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GMPErr GMPPlaneImpl::MaybeResize(int32_t aNewSize) {
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if (aNewSize <= AllocatedSize()) {
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return GMPNoErr;
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}
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if (!mHost) {
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return GMPGenericErr;
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}
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ipc::Shmem new_mem;
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if (!mHost->SharedMemMgr()->MgrAllocShmem(
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GMPSharedMem::kGMPFrameData, aNewSize, ipc::SharedMemory::TYPE_BASIC,
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&new_mem) ||
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!new_mem.get<uint8_t>()) {
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return GMPAllocErr;
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}
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if (mBuffer.IsReadable()) {
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memcpy(new_mem.get<uint8_t>(), Buffer(), mSize);
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}
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DestroyBuffer();
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mBuffer = new_mem;
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return GMPNoErr;
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}
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void GMPPlaneImpl::DestroyBuffer() {
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if (mHost && mBuffer.IsWritable()) {
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mHost->SharedMemMgr()->MgrDeallocShmem(GMPSharedMem::kGMPFrameData,
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mBuffer);
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}
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mBuffer = ipc::Shmem();
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}
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GMPErr GMPPlaneImpl::CreateEmptyPlane(int32_t aAllocatedSize, int32_t aStride,
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int32_t aPlaneSize) {
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if (aAllocatedSize < 1 || aStride < 1 || aPlaneSize < 1) {
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return GMPGenericErr;
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}
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GMPErr err = MaybeResize(aAllocatedSize);
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if (err != GMPNoErr) {
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return err;
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}
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mSize = aPlaneSize;
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mStride = aStride;
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return GMPNoErr;
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}
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GMPErr GMPPlaneImpl::Copy(const GMPPlane& aPlane) {
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auto& planeimpl = static_cast<const GMPPlaneImpl&>(aPlane);
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GMPErr err = MaybeResize(planeimpl.mSize);
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if (err != GMPNoErr) {
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return err;
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}
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if (planeimpl.Buffer() && planeimpl.mSize > 0) {
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memcpy(Buffer(), planeimpl.Buffer(), mSize);
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}
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mSize = planeimpl.mSize;
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mStride = planeimpl.mStride;
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return GMPNoErr;
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}
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GMPErr GMPPlaneImpl::Copy(int32_t aSize, int32_t aStride,
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const uint8_t* aBuffer) {
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GMPErr err = MaybeResize(aSize);
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if (err != GMPNoErr) {
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return err;
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}
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if (aBuffer && aSize > 0) {
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memcpy(Buffer(), aBuffer, aSize);
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}
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mSize = aSize;
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mStride = aStride;
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return GMPNoErr;
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}
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void GMPPlaneImpl::Swap(GMPPlane& aPlane) {
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auto& planeimpl = static_cast<GMPPlaneImpl&>(aPlane);
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std::swap(mStride, planeimpl.mStride);
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std::swap(mSize, planeimpl.mSize);
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std::swap(mBuffer, planeimpl.mBuffer);
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}
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int32_t GMPPlaneImpl::AllocatedSize() const {
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if (mBuffer.IsWritable()) {
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return mBuffer.Size<uint8_t>();
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}
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return 0;
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}
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void GMPPlaneImpl::ResetSize() { mSize = 0; }
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bool GMPPlaneImpl::IsZeroSize() const { return (mSize == 0); }
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int32_t GMPPlaneImpl::Stride() const { return mStride; }
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const uint8_t* GMPPlaneImpl::Buffer() const { return mBuffer.get<uint8_t>(); }
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uint8_t* GMPPlaneImpl::Buffer() { return mBuffer.get<uint8_t>(); }
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void GMPPlaneImpl::Destroy() { delete this; }
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} // namespace gmp
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} // namespace mozilla
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