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134 lines
3.6 KiB
134 lines
3.6 KiB
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "MediaAdapter"
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#include <utils/Log.h>
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#include <media/stagefright/foundation/ADebug.h>
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#include <media/stagefright/MediaAdapter.h>
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#include <media/stagefright/MediaBuffer.h>
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namespace android {
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MediaAdapter::MediaAdapter(const sp<MetaData> &meta)
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: mCurrentMediaBuffer(NULL),
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mStarted(false),
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mOutputFormat(meta) {
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}
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MediaAdapter::~MediaAdapter() {
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Mutex::Autolock autoLock(mAdapterLock);
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mOutputFormat.clear();
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CHECK(mCurrentMediaBuffer == NULL);
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}
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status_t MediaAdapter::start(MetaData * /* params */) {
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Mutex::Autolock autoLock(mAdapterLock);
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if (!mStarted) {
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mStarted = true;
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}
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return OK;
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}
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status_t MediaAdapter::stop() {
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MediaBuffer *currentBuffer = NULL;
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{
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Mutex::Autolock autoLock(mAdapterLock);
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if (mStarted) {
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mStarted = false;
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// If stop() happens immediately after a pushBuffer(), we should
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// clean up the mCurrentMediaBuffer. But need to release without
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// the lock as signalBufferReturned() will acquire the lock.
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currentBuffer = mCurrentMediaBuffer;
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mCurrentMediaBuffer = NULL;
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// While read() is still waiting, we should signal it to finish.
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mBufferReadCond.signal();
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}
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}
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if (currentBuffer != NULL) {
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currentBuffer->release();
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currentBuffer = NULL;
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}
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return OK;
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}
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sp<MetaData> MediaAdapter::getFormat() {
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Mutex::Autolock autoLock(mAdapterLock);
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return mOutputFormat;
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}
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void MediaAdapter::signalBufferReturned(MediaBufferBase *buffer) {
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Mutex::Autolock autoLock(mAdapterLock);
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CHECK(buffer != NULL);
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buffer->setObserver(0);
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buffer->release();
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ALOGV("buffer returned %p", buffer);
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mBufferReturnedCond.signal();
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}
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status_t MediaAdapter::read(
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MediaBufferBase **buffer, const ReadOptions * /* options */) {
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Mutex::Autolock autoLock(mAdapterLock);
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if (!mStarted) {
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ALOGV("Read before even started!");
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return ERROR_END_OF_STREAM;
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}
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while (mCurrentMediaBuffer == NULL && mStarted) {
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ALOGV("waiting @ read()");
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mBufferReadCond.wait(mAdapterLock);
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}
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if (!mStarted) {
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ALOGV("read interrupted after stop");
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CHECK(mCurrentMediaBuffer == NULL);
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return ERROR_END_OF_STREAM;
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}
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CHECK(mCurrentMediaBuffer != NULL);
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*buffer = mCurrentMediaBuffer;
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mCurrentMediaBuffer = NULL;
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return OK;
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}
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status_t MediaAdapter::pushBuffer(MediaBuffer *buffer) {
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if (buffer == NULL) {
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ALOGE("pushBuffer get an NULL buffer");
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return -EINVAL;
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}
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Mutex::Autolock autoLock(mAdapterLock);
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if (!mStarted) {
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ALOGE("pushBuffer called before start");
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return INVALID_OPERATION;
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}
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mCurrentMediaBuffer = buffer;
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mCurrentMediaBuffer->setObserver(this);
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mBufferReadCond.signal();
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ALOGV("wait for the buffer returned @ pushBuffer! %p", buffer);
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mBufferReturnedCond.wait(mAdapterLock);
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return OK;
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}
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} // namespace android
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