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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "MediaTexture"
#define LOG_NDEBUG 1
#include "config.h"
#include "MediaTexture.h"
#include "AndroidLog.h"
#include "TilesManager.h"
#include "GLUtils.h"
#include "MediaListener.h"
#if USE(ACCELERATED_COMPOSITING)
#include <android/native_window.h>
#include <gui/SurfaceTexture.h>
#include <gui/SurfaceTextureClient.h>
#include <JNIUtility.h>
#include "WebCoreJni.h"
// Limits the number of ANativeWindows that can be allocated for video playback.
// The limit is currently set to 2 as that is the current max number of
// simultaneous HW decodes that our OMX implementation allows. This forces the
// media producer to use their own SW decoders for subsequent video streams.
#define MAX_WINDOW_COUNT 2
namespace WebCore {
MediaTexture::MediaTexture(jobject webViewRef, jobject webViewCoreRef) : android::LightRefBase<MediaTexture>()
{
JNIEnv* env = JSC::Bindings::getJNIEnv();
m_weakWebViewRef = env->NewWeakGlobalRef(webViewRef);
m_weakWebViewCoreRef = env->NewWeakGlobalRef(webViewCoreRef);
m_contentTexture = 0;
m_isContentInverted = false;
m_newWindowRequest = false;
}
MediaTexture::~MediaTexture()
{
if (m_contentTexture)
deleteTexture(m_contentTexture, true);
for (unsigned int i = 0; i < m_videoTextures.size(); i++) {
deleteTexture(m_videoTextures[i], true);
}
JNIEnv* env = JSC::Bindings::getJNIEnv();
env->DeleteWeakGlobalRef(m_weakWebViewRef);
env->DeleteWeakGlobalRef(m_weakWebViewCoreRef);
}
bool MediaTexture::isContentInverted()
{
android::Mutex::Autolock lock(m_mediaLock);
return m_isContentInverted;
}
void MediaTexture::invertContents(bool invertContent)
{
android::Mutex::Autolock lock(m_mediaLock);
m_isContentInverted = invertContent;
}
void MediaTexture::initNativeWindowIfNeeded()
{
{
android::Mutex::Autolock lock(m_mediaLock);
// check to see if there are any unused textures to delete
if (m_unusedTextures.size() != 0) {
for (unsigned int i = 0; i < m_unusedTextures.size(); i++) {
glDeleteTextures(1, &m_unusedTextures[i]);
}
m_unusedTextures.clear();
}
// create a content texture if none exists
if (!m_contentTexture) {
m_contentTexture = createTexture();
// send a message to the WebKit thread to notify the plugin that it can draw
if (m_weakWebViewCoreRef) {
JNIEnv* env = JSC::Bindings::getJNIEnv();
jobject localWebViewCoreRef = env->NewLocalRef(m_weakWebViewCoreRef);
if (localWebViewCoreRef) {
jclass wvClass = env->GetObjectClass(localWebViewCoreRef);
jmethodID sendPluginDrawMsg =
env->GetMethodID(wvClass, "sendPluginDrawMsg", "()V");
env->CallVoidMethod(localWebViewCoreRef, sendPluginDrawMsg);
env->DeleteLocalRef(wvClass);
env->DeleteLocalRef(localWebViewCoreRef);
}
checkException(env);
}
}
// finally create a video texture if needed
if (!m_newWindowRequest)
return;
// add the texture and add it to the list
TextureWrapper* videoTexture = createTexture();
m_videoTextures.append(videoTexture);
// setup the state variables to signal the other thread
m_newWindowRequest = false;
m_newWindow = videoTexture->nativeWindow;
}
// signal the WebKit thread in case it is waiting
m_newMediaRequestCond.signal();
}
void MediaTexture::draw(const TransformationMatrix& contentMatrix,
const TransformationMatrix& videoMatrix,
const SkRect& mediaBounds)
{
android::Mutex::Autolock lock(m_mediaLock);
if (mediaBounds.isEmpty())
return;
// draw all the video textures first
for (unsigned int i = 0; i < m_videoTextures.size(); i++) {
TextureWrapper* video = m_videoTextures[i];
if (!video->surfaceTexture.get() || video->dimensions.isEmpty()
|| !video->mediaListener->isFrameAvailable())
continue;
video->surfaceTexture->updateTexImage();
float surfaceMatrix[16];
video->surfaceTexture->getTransformMatrix(surfaceMatrix);
SkRect dimensions = video->dimensions;
dimensions.offset(mediaBounds.fLeft, mediaBounds.fTop);
#ifdef DEBUG
if (!mediaBounds.contains(dimensions)) {
ALOGV("The video exceeds is parent's bounds.");
}
#endif // DEBUG
TilesManager::instance()->shader()->drawVideoLayerQuad(videoMatrix,
surfaceMatrix, dimensions, video->textureId);
}
if (!m_contentTexture->mediaListener->isFrameAvailable())
return;
m_contentTexture->surfaceTexture->updateTexImage();
sp<GraphicBuffer> buf = m_contentTexture->surfaceTexture->getCurrentBuffer();
PixelFormat f = buf->getPixelFormat();
// only attempt to use alpha blending if alpha channel exists
bool forceAlphaBlending = !(
PIXEL_FORMAT_RGBX_8888 == f ||
PIXEL_FORMAT_RGB_888 == f ||
PIXEL_FORMAT_RGB_565 == f);
TilesManager::instance()->shader()->drawLayerQuad(contentMatrix,
mediaBounds,
m_contentTexture->textureId,
1.0f, forceAlphaBlending,
GL_TEXTURE_EXTERNAL_OES);
}
ANativeWindow* MediaTexture::requestNativeWindowForVideo()
{
android::Mutex::Autolock lock(m_mediaLock);
// the window was not ready before the timeout so return it this time
if (ANativeWindow* window = m_newWindow.get()) {
m_newWindow.clear();
return window;
}
// we only allow for so many textures, so return NULL if we exceed that limit
else if (m_videoTextures.size() >= MAX_WINDOW_COUNT) {
return 0;
}
m_newWindowRequest = true;
// post an inval message to the UI thread to fulfill the request
if (m_weakWebViewRef) {
JNIEnv* env = JSC::Bindings::getJNIEnv();
jobject localWebViewRef = env->NewLocalRef(m_weakWebViewRef);
if (localWebViewRef) {
jclass wvClass = env->GetObjectClass(localWebViewRef);
jmethodID postInvalMethod = env->GetMethodID(wvClass, "postInvalidate", "()V");
env->CallVoidMethod(localWebViewRef, postInvalMethod);
env->DeleteLocalRef(wvClass);
env->DeleteLocalRef(localWebViewRef);
}
checkException(env);
}
//block until the request can be fulfilled or we time out
bool timedOut = false;
while (m_newWindowRequest && !timedOut) {
int ret = m_newMediaRequestCond.waitRelative(m_mediaLock, 500000000); // .5 sec
timedOut = ret == TIMED_OUT;
}
// if the window is ready then return it otherwise return NULL
if (ANativeWindow* window = m_newWindow.get()) {
m_newWindow.clear();
return window;
}
return 0;
}
ANativeWindow* MediaTexture::getNativeWindowForContent()
{
android::Mutex::Autolock lock(m_mediaLock);
if (m_contentTexture)
return m_contentTexture->nativeWindow.get();
else
return 0;
}
void MediaTexture::releaseNativeWindow(const ANativeWindow* window)
{
android::Mutex::Autolock lock(m_mediaLock);
for (unsigned int i = 0; i < m_videoTextures.size(); i++) {
if (m_videoTextures[i]->nativeWindow.get() == window) {
deleteTexture(m_videoTextures[i]);
m_videoTextures.remove(i);
break;
}
}
}
void MediaTexture::setDimensions(const ANativeWindow* window,
const SkRect& dimensions)
{
android::Mutex::Autolock lock(m_mediaLock);
for (unsigned int i = 0; i < m_videoTextures.size(); i++) {
if (m_videoTextures[i]->nativeWindow.get() == window) {
m_videoTextures[i]->dimensions = dimensions;
break;
}
}
}
void MediaTexture::setFramerateCallback(const ANativeWindow* window,
FramerateCallbackProc callback)
{
android::Mutex::Autolock lock(m_mediaLock);
for (unsigned int i = 0; i < m_videoTextures.size(); i++) {
if (m_videoTextures[i]->nativeWindow.get() == window) {
m_videoTextures[i]->mediaListener->setFramerateCallback(callback);
break;
}
}
}
MediaTexture::TextureWrapper* MediaTexture::createTexture()
{
TextureWrapper* wrapper = new TextureWrapper();
// populate the wrapper
glGenTextures(1, &wrapper->textureId);
wrapper->surfaceTexture = new android::SurfaceTexture(wrapper->textureId);
wrapper->nativeWindow = new android::SurfaceTextureClient(wrapper->surfaceTexture);
wrapper->dimensions.setEmpty();
// setup callback
wrapper->mediaListener = new MediaListener(m_weakWebViewRef,
wrapper->surfaceTexture,
wrapper->nativeWindow);
wrapper->surfaceTexture->setFrameAvailableListener(wrapper->mediaListener);
return wrapper;
}
void MediaTexture::deleteTexture(TextureWrapper* texture, bool force)
{
if (texture->surfaceTexture.get())
texture->surfaceTexture->setFrameAvailableListener(0);
if (force)
glDeleteTextures(1, &texture->textureId);
else
m_unusedTextures.append(texture->textureId);
// clear the strong pointer references
texture->mediaListener.clear();
texture->nativeWindow.clear();
texture->surfaceTexture.clear();
delete texture;
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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