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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/video_frame_provider_client_impl.h"
#include "cc/math_util.h"
#include "cc/video_layer_impl.h"
namespace cc {
// static
scoped_refptr<VideoFrameProviderClientImpl>
VideoFrameProviderClientImpl::Create(
VideoFrameProvider* provider) {
return make_scoped_refptr(
new VideoFrameProviderClientImpl(provider));
}
VideoFrameProviderClientImpl::~VideoFrameProviderClientImpl() {}
VideoFrameProviderClientImpl::VideoFrameProviderClientImpl(
VideoFrameProvider* provider)
: provider_(provider) {
// This only happens during a commit on the compositor thread while the main
// thread is blocked. That makes this a thread-safe call to set the video
// frame provider client that does not require a lock. The same is true of
// the call to Stop().
provider_->SetVideoFrameProviderClient(this);
// This matrix is the default transformation for stream textures, and flips
// on the Y axis.
stream_texture_matrix_ = gfx::Transform(
1.0, 0.0, 0.0, 0.0,
0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0);
}
void VideoFrameProviderClientImpl::Stop() {
if (!provider_)
return;
provider_->SetVideoFrameProviderClient(NULL);
provider_ = NULL;
}
media::VideoFrame* VideoFrameProviderClientImpl::AcquireLockAndCurrentFrame() {
provider_lock_.Acquire(); // Balanced by call to ReleaseLock().
if (!provider_)
return NULL;
return provider_->GetCurrentFrame();
}
void VideoFrameProviderClientImpl::PutCurrentFrame(media::VideoFrame* frame) {
provider_lock_.AssertAcquired();
provider_->PutCurrentFrame(frame);
}
void VideoFrameProviderClientImpl::ReleaseLock() {
provider_lock_.AssertAcquired();
provider_lock_.Release();
}
void VideoFrameProviderClientImpl::StopUsingProvider() {
// Block the provider from shutting down until this client is done
// using the frame.
base::AutoLock locker(provider_lock_);
provider_ = 0;
}
void VideoFrameProviderClientImpl::DidReceiveFrame() {
if (active_video_layer_)
active_video_layer_->setNeedsRedraw();
}
void VideoFrameProviderClientImpl::DidUpdateMatrix(const float* matrix) {
stream_texture_matrix_ = gfx::Transform(
matrix[0], matrix[4], matrix[8], matrix[12],
matrix[1], matrix[5], matrix[9], matrix[13],
matrix[2], matrix[6], matrix[10], matrix[14],
matrix[3], matrix[7], matrix[11], matrix[15]);
if (active_video_layer_)
active_video_layer_->setNeedsRedraw();
}
} // namespace cc
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