diff options
Diffstat (limited to 'media/libstagefright/filters/GraphicBufferListener.cpp')
-rw-r--r-- | media/libstagefright/filters/GraphicBufferListener.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/media/libstagefright/filters/GraphicBufferListener.cpp b/media/libstagefright/filters/GraphicBufferListener.cpp new file mode 100644 index 0000000..fa38192 --- /dev/null +++ b/media/libstagefright/filters/GraphicBufferListener.cpp @@ -0,0 +1,154 @@ +/* + * 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 "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 %u: %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 +} + +BufferQueue::BufferItem GraphicBufferListener::getBufferItem() { + BufferQueue::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( + BufferQueue::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( + BufferQueue::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 |