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/*
* Copyright (C) 2014 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_NDEBUG 0
#define LOG_TAG "GraphicBufferListener"
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/MediaErrors.h>
#include <gui/BufferItem.h>
#include "GraphicBufferListener.h"
namespace android {
status_t GraphicBufferListener::init(
const sp<AMessage> ¬ify,
size_t bufferWidth, size_t bufferHeight, size_t bufferCount) {
mNotify = notify;
String8 name("GraphicBufferListener");
BufferQueue::createBufferQueue(&mProducer, &mConsumer);
mConsumer->setConsumerName(name);
mConsumer->setDefaultBufferSize(bufferWidth, bufferHeight);
mConsumer->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN);
status_t err = mConsumer->setMaxAcquiredBufferCount(bufferCount);
if (err != NO_ERROR) {
ALOGE("Unable to set BQ max acquired buffer count to %zu: %d",
bufferCount, err);
return err;
}
wp<BufferQueue::ConsumerListener> listener =
static_cast<BufferQueue::ConsumerListener*>(this);
sp<BufferQueue::ProxyConsumerListener> proxy =
new BufferQueue::ProxyConsumerListener(listener);
err = mConsumer->consumerConnect(proxy, false);
if (err != NO_ERROR) {
ALOGE("Error connecting to BufferQueue: %s (%d)",
strerror(-err), err);
return err;
}
ALOGV("init() successful.");
return OK;
}
void GraphicBufferListener::onFrameAvailable(const BufferItem& /* item */) {
ALOGV("onFrameAvailable() called");
{
Mutex::Autolock autoLock(mMutex);
mNumFramesAvailable++;
}
sp<AMessage> notify = mNotify->dup();
mNotify->setWhat(kWhatFrameAvailable);
mNotify->post();
}
void GraphicBufferListener::onBuffersReleased() {
ALOGV("onBuffersReleased() called");
// nothing to do
}
void GraphicBufferListener::onSidebandStreamChanged() {
ALOGW("GraphicBufferListener cannot consume sideband streams.");
// nothing to do
}
BufferItem GraphicBufferListener::getBufferItem() {
BufferItem item;
{
Mutex::Autolock autoLock(mMutex);
if (mNumFramesAvailable <= 0) {
ALOGE("getBuffer() called with no frames available");
return item;
}
mNumFramesAvailable--;
}
status_t err = mConsumer->acquireBuffer(&item, 0);
if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
// shouldn't happen, since we track num frames available
ALOGE("frame was not available");
item.mBuf = -1;
return item;
} else if (err != OK) {
ALOGE("acquireBuffer returned err=%d", err);
item.mBuf = -1;
return item;
}
// Wait for it to become available.
err = item.mFence->waitForever("GraphicBufferListener::getBufferItem");
if (err != OK) {
ALOGW("failed to wait for buffer fence: %d", err);
// keep going
}
// If this is the first time we're seeing this buffer, add it to our
// slot table.
if (item.mGraphicBuffer != NULL) {
ALOGV("setting mBufferSlot %d", item.mBuf);
mBufferSlot[item.mBuf] = item.mGraphicBuffer;
}
return item;
}
sp<GraphicBuffer> GraphicBufferListener::getBuffer(BufferItem item) {
sp<GraphicBuffer> buf;
if (item.mBuf < 0 || item.mBuf >= BufferQueue::NUM_BUFFER_SLOTS) {
ALOGE("getBuffer() received invalid BufferItem: mBuf==%d", item.mBuf);
return buf;
}
buf = mBufferSlot[item.mBuf];
CHECK(buf.get() != NULL);
return buf;
}
status_t GraphicBufferListener::releaseBuffer(BufferItem item) {
if (item.mBuf < 0 || item.mBuf >= BufferQueue::NUM_BUFFER_SLOTS) {
ALOGE("getBuffer() received invalid BufferItem: mBuf==%d", item.mBuf);
return ERROR_OUT_OF_RANGE;
}
mConsumer->releaseBuffer(item.mBuf, item.mFrameNumber,
EGL_NO_DISPLAY, EGL_NO_SYNC_KHR, Fence::NO_FENCE);
return OK;
}
} // namespace android
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