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/*
* Copyright (C) 2013 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 "MediaAdapter"
#include <utils/Log.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/MediaAdapter.h>
#include <media/stagefright/MediaBuffer.h>
namespace android {
MediaAdapter::MediaAdapter(const sp<MetaData> &meta)
: mCurrentMediaBuffer(NULL),
mStarted(false),
mOutputFormat(meta) {
}
MediaAdapter::~MediaAdapter() {
Mutex::Autolock autoLock(mAdapterLock);
mOutputFormat.clear();
CHECK(mCurrentMediaBuffer == NULL);
}
status_t MediaAdapter::start(MetaData * /* params */) {
Mutex::Autolock autoLock(mAdapterLock);
if (!mStarted) {
mStarted = true;
}
return OK;
}
status_t MediaAdapter::stop() {
Mutex::Autolock autoLock(mAdapterLock);
if (mStarted) {
mStarted = false;
// If stop() happens immediately after a pushBuffer(), we should
// clean up the mCurrentMediaBuffer
if (mCurrentMediaBuffer != NULL) {
mCurrentMediaBuffer->release();
mCurrentMediaBuffer = NULL;
}
// While read() is still waiting, we should signal it to finish.
mBufferReadCond.signal();
}
return OK;
}
sp<MetaData> MediaAdapter::getFormat() {
Mutex::Autolock autoLock(mAdapterLock);
return mOutputFormat;
}
void MediaAdapter::signalBufferReturned(MediaBuffer *buffer) {
Mutex::Autolock autoLock(mAdapterLock);
CHECK(buffer != NULL);
buffer->setObserver(0);
buffer->release();
ALOGV("buffer returned %p", buffer);
mBufferReturnedCond.signal();
}
status_t MediaAdapter::read(
MediaBuffer **buffer, const ReadOptions * /* options */) {
Mutex::Autolock autoLock(mAdapterLock);
if (!mStarted) {
ALOGV("Read before even started!");
return ERROR_END_OF_STREAM;
}
while (mCurrentMediaBuffer == NULL && mStarted) {
ALOGV("waiting @ read()");
mBufferReadCond.wait(mAdapterLock);
}
if (!mStarted) {
ALOGV("read interrupted after stop");
CHECK(mCurrentMediaBuffer == NULL);
return ERROR_END_OF_STREAM;
}
CHECK(mCurrentMediaBuffer != NULL);
*buffer = mCurrentMediaBuffer;
mCurrentMediaBuffer = NULL;
(*buffer)->setObserver(this);
return OK;
}
status_t MediaAdapter::pushBuffer(MediaBuffer *buffer) {
if (buffer == NULL) {
ALOGE("pushBuffer get an NULL buffer");
return -EINVAL;
}
Mutex::Autolock autoLock(mAdapterLock);
if (!mStarted) {
ALOGE("pushBuffer called before start");
return INVALID_OPERATION;
}
mCurrentMediaBuffer = buffer;
mBufferReadCond.signal();
ALOGV("wait for the buffer returned @ pushBuffer! %p", buffer);
mBufferReturnedCond.wait(mAdapterLock);
return OK;
}
} // namespace android
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