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// Copyright (c) 2010 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 "chrome/renderer/media/ipc_video_renderer.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/render_thread.h"
#include "media/base/video_frame.h"
#include "media/base/media_format.h"
IPCVideoRenderer::IPCVideoRenderer(
webkit_glue::WebMediaPlayerImpl::Proxy* proxy,
int routing_id)
: proxy_(proxy),
created_(false),
routing_id_(routing_id),
stopped_(false, false) {
// TODO(hclam): decide whether to do the following line in this thread or
// in the render thread.
proxy->SetVideoRenderer(this);
}
IPCVideoRenderer::~IPCVideoRenderer() {
}
// static
media::FilterFactory* IPCVideoRenderer::CreateFactory(
webkit_glue::WebMediaPlayerImpl::Proxy* proxy,
int routing_id) {
return new media::FilterFactoryImpl2<
IPCVideoRenderer,
webkit_glue::WebMediaPlayerImpl::Proxy*,
int>(proxy, routing_id);
}
// static
bool IPCVideoRenderer::IsMediaFormatSupported(
const media::MediaFormat& media_format) {
int width = 0;
int height = 0;
return ParseMediaFormat(media_format, &width, &height);
}
bool IPCVideoRenderer::OnInitialize(media::VideoDecoder* decoder) {
int width = 0;
int height = 0;
if (!ParseMediaFormat(decoder->media_format(), &width, &height))
return false;
video_size_.SetSize(width, height);
// TODO(scherkus): we're assuming YV12 here.
size_t size = (width * height) + ((width * height) >> 1);
uint32 epoch = static_cast<uint32>(reinterpret_cast<size_t>(this));
transport_dib_.reset(TransportDIB::Create(size, epoch));
CHECK(transport_dib_.get());
return true;
}
void IPCVideoRenderer::OnStop() {
stopped_.Signal();
proxy_->message_loop()->PostTask(FROM_HERE,
NewRunnableMethod(this, &IPCVideoRenderer::DoDestroyVideo));
}
void IPCVideoRenderer::OnFrameAvailable() {
proxy_->message_loop()->PostTask(FROM_HERE,
NewRunnableMethod(this, &IPCVideoRenderer::DoUpdateVideo));
}
void IPCVideoRenderer::SetRect(const gfx::Rect& rect) {
DCHECK(MessageLoop::current() == proxy_->message_loop());
// TODO(scherkus): this is actually a SetSize() call... there's a pending
// WebKit bug to get this fixed up. It would be nice if this was a real
// SetRect() call so we could get the absolute coordinates instead of relying
// on Paint().
}
void IPCVideoRenderer::Paint(skia::PlatformCanvas* canvas,
const gfx::Rect& dest_rect) {
DCHECK(MessageLoop::current() == proxy_->message_loop());
// Copy the rect for UpdateVideo messages.
video_rect_ = dest_rect;
if (!created_) {
created_ = true;
Send(new ViewHostMsg_CreateVideo(routing_id_, video_size_));
// Force an update in case the first frame arrived before the first
// Paint() call.
DoUpdateVideo();
}
// TODO(scherkus): code to punch a hole through the backing store goes here.
// We don't need it right away since we don't do a proper alpha composite
// between the browser BackingStore and VideoLayer.
}
void IPCVideoRenderer::Send(IPC::Message* msg) {
DCHECK(routing_id_ != MSG_ROUTING_NONE);
DCHECK(routing_id_ == msg->routing_id());
bool result = RenderThread::current()->Send(msg);
LOG_IF(ERROR, !result) << "RenderThread::current()->Send(msg) failed";
}
void IPCVideoRenderer::DoUpdateVideo() {
DCHECK(MessageLoop::current() == proxy_->message_loop());
// Nothing to do if we don't know where we are positioned on the page.
if (!created_ || video_rect_.IsEmpty() || stopped_.IsSignaled()) {
return;
}
scoped_refptr<media::VideoFrame> frame;
GetCurrentFrame(&frame);
if (!frame) {
return;
}
CHECK(frame->width() == static_cast<size_t>(video_size_.width()));
CHECK(frame->height() == static_cast<size_t>(video_size_.height()));
CHECK(frame->format() == media::VideoFrame::YV12);
CHECK(frame->planes() == 3);
uint8* dest = reinterpret_cast<uint8*>(transport_dib_->memory());
// Copy Y plane.
const uint8* src = frame->data(media::VideoFrame::kYPlane);
size_t stride = frame->stride(media::VideoFrame::kYPlane);
for (size_t row = 0; row < frame->height(); ++row) {
memcpy(dest, src, frame->width());
dest += frame->width();
src += stride;
}
// Copy U plane.
src = frame->data(media::VideoFrame::kUPlane);
stride = frame->stride(media::VideoFrame::kUPlane);
for (size_t row = 0; row < frame->height() / 2; ++row) {
memcpy(dest, src, frame->width() / 2);
dest += frame->width() / 2;
src += stride;
}
// Copy V plane.
src = frame->data(media::VideoFrame::kVPlane);
stride = frame->stride(media::VideoFrame::kVPlane);
for (size_t row = 0; row < frame->height() / 2; ++row) {
memcpy(dest, src, frame->width() / 2);
dest += frame->width() / 2;
src += stride;
}
// Sanity check!
uint8* expected = reinterpret_cast<uint8*>(transport_dib_->memory()) +
transport_dib_->size();
CHECK(dest == expected);
Send(new ViewHostMsg_UpdateVideo(routing_id_,
transport_dib_->id(),
video_rect_));
}
void IPCVideoRenderer::DoDestroyVideo() {
DCHECK(MessageLoop::current() == proxy_->message_loop());
// We shouldn't receive any more messages after the browser receives this.
Send(new ViewHostMsg_DestroyVideo(routing_id_));
// Detach ourselves from the proxy.
proxy_->SetVideoRenderer(NULL);
proxy_ = NULL;
}
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