gecko-dev/widget/gonk/nativewindow/GonkNativeWindowKK.cpp

/*
 * Copyright (C) 2012 The Android Open Source Project
 * Copyright (C) 2013 Mozilla Foundation
 *
 * 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_NDEBUG 0
#define LOG_TAG "GonkNativeWindow"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
#include <utils/Log.h>

#include "GonkNativeWindowKK.h"
#include "GrallocImages.h"

#define BI_LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
#define BI_LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
#define BI_LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
#define BI_LOGW(...) __android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)
#define BI_LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)

using namespace mozilla::layers;

namespace android {

GonkNativeWindow::GonkNativeWindow() :
    GonkConsumerBase(new GonkBufferQueue(true), false)
{
    mConsumer->setMaxAcquiredBufferCount(GonkBufferQueue::MIN_UNDEQUEUED_BUFFERS);
}

GonkNativeWindow::GonkNativeWindow(const sp<GonkBufferQueue>& bq,
        uint32_t consumerUsage, int bufferCount, bool controlledByApp) :
    GonkConsumerBase(bq, controlledByApp)
{
    mConsumer->setConsumerUsageBits(consumerUsage);
    mConsumer->setMaxAcquiredBufferCount(bufferCount);
}

GonkNativeWindow::~GonkNativeWindow() {
}

void GonkNativeWindow::setName(const String8& name) {
    Mutex::Autolock _l(mMutex);
    mName = name;
    mConsumer->setConsumerName(name);
}

status_t GonkNativeWindow::acquireBuffer(BufferItem *item,
        nsecs_t presentWhen, bool waitForFence) {
    status_t err;

    if (!item) return BAD_VALUE;

    Mutex::Autolock _l(mMutex);

    err = acquireBufferLocked(item, presentWhen);
    if (err != OK) {
        if (err != NO_BUFFER_AVAILABLE) {
            BI_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
        }
        return err;
    }

    if (waitForFence) {
        err = item->mFence->waitForever("GonkNativeWindow::acquireBuffer");
        if (err != OK) {
            BI_LOGE("Failed to wait for fence of acquired buffer: %s (%d)",
                    strerror(-err), err);
            return err;
        }
    }

    item->mGraphicBuffer = mSlots[item->mBuf].mGraphicBuffer;

    return OK;
}

status_t GonkNativeWindow::releaseBuffer(const BufferItem &item,
        const sp<Fence>& releaseFence) {
    status_t err;

    Mutex::Autolock _l(mMutex);

    err = addReleaseFenceLocked(item.mBuf, item.mGraphicBuffer, releaseFence);

    err = releaseBufferLocked(item.mBuf, item.mGraphicBuffer);
    if (err != OK) {
        BI_LOGE("Failed to release buffer: %s (%d)",
                strerror(-err), err);
    }
    return err;
}

status_t GonkNativeWindow::setDefaultBufferSize(uint32_t w, uint32_t h) {
    Mutex::Autolock _l(mMutex);
    return mConsumer->setDefaultBufferSize(w, h);
}

status_t GonkNativeWindow::setDefaultBufferFormat(uint32_t defaultFormat) {
    Mutex::Autolock _l(mMutex);
    return mConsumer->setDefaultBufferFormat(defaultFormat);
}

already_AddRefed<GraphicBufferLocked>
GonkNativeWindow::getCurrentBuffer()
{
    Mutex::Autolock _l(mMutex);
    BufferItem item;

    // In asynchronous mode the list is guaranteed to be one buffer
    // deep, while in synchronous mode we use the oldest buffer.
    status_t err = acquireBufferLocked(&item, 0); //???

    if (err != NO_ERROR) {
        return NULL;
    }

  nsRefPtr<GraphicBufferLocked> ret =
    new CameraGraphicBuffer(this, item.mBuf, mConsumer->getGeneration(), item.mSurfaceDescriptor);

  return ret.forget();
}

bool
GonkNativeWindow::returnBuffer(uint32_t index, uint32_t generation, const sp<Fence>& fence) {
    BI_LOGD("GonkNativeWindow::returnBuffer: slot=%d (generation=%d)", index, generation);
    Mutex::Autolock lock(mMutex);

    if (generation != mConsumer->getGeneration()) {
        BI_LOGD("returnBuffer: buffer is from generation %d (current is %d)",
          generation, mConsumer->getGeneration());
        return false;
    }

    status_t err;
    err = addReleaseFenceLocked(index, mSlots[index].mGraphicBuffer, fence);

    err = releaseBufferLocked(index, mSlots[index].mGraphicBuffer);
    if (err != NO_ERROR) {
        return false;
    }
  return true;
}

mozilla::layers::SurfaceDescriptor *
GonkNativeWindow::getSurfaceDescriptorFromBuffer(ANativeWindowBuffer* buffer) {
    Mutex::Autolock lock(mMutex);

    return mConsumer->getSurfaceDescriptorFromBuffer(buffer);
}
void GonkNativeWindow::setNewFrameCallback(
        GonkNativeWindowNewFrameCallback* aCallback) {
    BI_LOGD("setNewFrameCallback");
    Mutex::Autolock lock(mMutex);
    mNewFrameCallback = aCallback;
}

void GonkNativeWindow::onFrameAvailable() {
    GonkConsumerBase::onFrameAvailable();

    if (mNewFrameCallback) {
      mNewFrameCallback->OnNewFrame();
    }
}

void CameraGraphicBuffer::Unlock() {
    if (mLocked) {
        android::sp<android::Fence> fence;
        fence = mReleaseFenceHandle.IsValid() ? mReleaseFenceHandle.mFence : Fence::NO_FENCE;
        // The window might have been destroyed. The buffer is no longer
        // valid at that point.
        sp<GonkNativeWindow> window = mNativeWindow.promote();
        if (window.get() && window->returnBuffer(mIndex, mGeneration, fence)) {
            mLocked = false;
        } else {
            // If the window doesn't exist any more, release the buffer
            // directly.
            ImageBridgeChild *ibc = ImageBridgeChild::GetSingleton();
            ibc->DeallocSurfaceDescriptorGralloc(mSurfaceDescriptor);
        }
    }
}

} // namespace android