tenfourfox/media/gmp-clearkey/0.1/AudioDecoder.cpp

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2017-04-19 07:56:45 +00:00
/*
* Copyright 2015, Mozilla Foundation and contributors
*
* 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.
*/
#include <cstdint>
#include <limits>
#include "AudioDecoder.h"
#include "ClearKeyDecryptionManager.h"
#include "ClearKeyUtils.h"
#include "gmp-task-utils.h"
using namespace wmf;
AudioDecoder::AudioDecoder(GMPAudioHost *aHostAPI)
: mHostAPI(aHostAPI)
, mCallback(nullptr)
, mWorkerThread(nullptr)
, mMutex(nullptr)
, mNumInputTasks(0)
, mHasShutdown(false)
{
// We drop the ref in DecodingComplete().
AddRef();
}
AudioDecoder::~AudioDecoder()
{
if (mMutex) {
mMutex->Destroy();
}
}
void
AudioDecoder::InitDecode(const GMPAudioCodec& aConfig,
GMPAudioDecoderCallback* aCallback)
{
mCallback = aCallback;
assert(mCallback);
mDecoder = new WMFAACDecoder();
HRESULT hr = mDecoder->Init(aConfig.mChannelCount,
aConfig.mSamplesPerSecond,
(BYTE*)aConfig.mExtraData,
aConfig.mExtraDataLen);
LOG("[%p] AudioDecoder::InitializeAudioDecoder() hr=0x%x\n", this, hr);
if (FAILED(hr)) {
mCallback->Error(GMPGenericErr);
return;
}
auto err = GetPlatform()->createmutex(&mMutex);
if (GMP_FAILED(err)) {
mCallback->Error(GMPGenericErr);
return;
}
}
void
AudioDecoder::EnsureWorker()
{
if (!mWorkerThread) {
GetPlatform()->createthread(&mWorkerThread);
if (!mWorkerThread) {
mCallback->Error(GMPAllocErr);
return;
}
}
}
void
AudioDecoder::Decode(GMPAudioSamples* aInput)
{
EnsureWorker();
{
AutoLock lock(mMutex);
mNumInputTasks++;
}
mWorkerThread->Post(WrapTaskRefCounted(this,
&AudioDecoder::DecodeTask,
aInput));
}
void
AudioDecoder::DecodeTask(GMPAudioSamples* aInput)
{
HRESULT hr;
{
AutoLock lock(mMutex);
mNumInputTasks--;
assert(mNumInputTasks >= 0);
}
if (!aInput || !mHostAPI || !mDecoder) {
LOG("Decode job not set up correctly!");
return;
}
const uint8_t* inBuffer = aInput->Buffer();
if (!inBuffer) {
LOG("No buffer for encoded samples!\n");
return;
}
const GMPEncryptedBufferMetadata* crypto = aInput->GetDecryptionData();
std::vector<uint8_t> buffer(inBuffer, inBuffer + aInput->Size());
if (crypto) {
// Plugin host should have set up its decryptor/key sessions
// before trying to decode!
GMPErr rv =
ClearKeyDecryptionManager::Get()->Decrypt(buffer, CryptoMetaData(crypto));
if (GMP_FAILED(rv)) {
CK_LOGE("Failed to decrypt with key id %08x...", *(uint32_t*)crypto->KeyId());
MaybeRunOnMainThread(WrapTask(mCallback, &GMPAudioDecoderCallback::Error, rv));
return;
}
}
hr = mDecoder->Input(&buffer[0],
buffer.size(),
aInput->TimeStamp());
// We must delete the input sample!
GetPlatform()->runonmainthread(WrapTask(aInput, &GMPAudioSamples::Destroy));
SAMPLE_LOG("AudioDecoder::DecodeTask() Input ret hr=0x%x\n", hr);
if (FAILED(hr)) {
LOG("AudioDecoder::DecodeTask() decode failed ret=0x%x%s\n",
hr,
((hr == MF_E_NOTACCEPTING) ? " (MF_E_NOTACCEPTING)" : ""));
return;
}
while (hr == S_OK) {
CComPtr<IMFSample> output;
hr = mDecoder->Output(&output);
SAMPLE_LOG("AudioDecoder::DecodeTask() output ret=0x%x\n", hr);
if (hr == S_OK) {
ReturnOutput(output);
}
if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT) {
AutoLock lock(mMutex);
if (mNumInputTasks == 0) {
// We have run all input tasks. We *must* notify Gecko so that it will
// send us more data.
MaybeRunOnMainThread(WrapTask(mCallback, &GMPAudioDecoderCallback::InputDataExhausted));
}
} else if (FAILED(hr)) {
LOG("AudioDecoder::DecodeTask() output failed hr=0x%x\n", hr);
}
}
}
void
AudioDecoder::ReturnOutput(IMFSample* aSample)
{
SAMPLE_LOG("[%p] AudioDecoder::ReturnOutput()\n", this);
assert(aSample);
HRESULT hr;
GMPAudioSamples* samples = nullptr;
mHostAPI->CreateSamples(kGMPAudioIS16Samples, &samples);
if (!samples) {
LOG("Failed to create i420 frame!\n");
return;
}
hr = MFToGMPSample(aSample, samples);
if (FAILED(hr)) {
samples->Destroy();
LOG("Failed to prepare output sample!");
return;
}
ENSURE(SUCCEEDED(hr), /*void*/);
MaybeRunOnMainThread(WrapTask(mCallback, &GMPAudioDecoderCallback::Decoded, samples));
}
HRESULT
AudioDecoder::MFToGMPSample(IMFSample* aInput,
GMPAudioSamples* aOutput)
{
ENSURE(aInput != nullptr, E_POINTER);
ENSURE(aOutput != nullptr, E_POINTER);
HRESULT hr;
CComPtr<IMFMediaBuffer> mediaBuffer;
hr = aInput->ConvertToContiguousBuffer(&mediaBuffer);
ENSURE(SUCCEEDED(hr), hr);
BYTE* data = nullptr; // Note: *data will be owned by the IMFMediaBuffer, we don't need to free it.
DWORD maxLength = 0, currentLength = 0;
hr = mediaBuffer->Lock(&data, &maxLength, &currentLength);
ENSURE(SUCCEEDED(hr), hr);
auto err = aOutput->SetBufferSize(currentLength);
ENSURE(GMP_SUCCEEDED(err), E_FAIL);
memcpy(aOutput->Buffer(), data, currentLength);
mediaBuffer->Unlock();
LONGLONG hns = 0;
hr = aInput->GetSampleTime(&hns);
ENSURE(SUCCEEDED(hr), hr);
aOutput->SetTimeStamp(HNsToUsecs(hns));
aOutput->SetChannels(mDecoder->Channels());
aOutput->SetRate(mDecoder->Rate());
return S_OK;
}
void
AudioDecoder::Reset()
{
if (mDecoder) {
mDecoder->Reset();
}
if (mCallback) {
mCallback->ResetComplete();
}
}
void
AudioDecoder::DrainTask()
{
mDecoder->Drain();
// Return any pending output.
HRESULT hr = S_OK;
while (hr == S_OK) {
CComPtr<IMFSample> output;
hr = mDecoder->Output(&output);
SAMPLE_LOG("AudioDecoder::DrainTask() output ret=0x%x\n", hr);
if (hr == S_OK) {
ReturnOutput(output);
}
}
MaybeRunOnMainThread(WrapTask(mCallback, &GMPAudioDecoderCallback::DrainComplete));
}
void
AudioDecoder::Drain()
{
if (!mDecoder) {
return;
}
EnsureWorker();
mWorkerThread->Post(WrapTaskRefCounted(this,
&AudioDecoder::DrainTask));
}
void
AudioDecoder::DecodingComplete()
{
if (mWorkerThread) {
mWorkerThread->Join();
}
mHasShutdown = true;
// Release the reference we added in the constructor. There may be
// WrapRefCounted tasks that also hold references to us, and keep
// us alive a little longer.
Release();
}
void
AudioDecoder::MaybeRunOnMainThread(GMPTask* aTask)
{
class MaybeRunTask : public GMPTask
{
public:
MaybeRunTask(AudioDecoder* aDecoder, GMPTask* aTask)
: mDecoder(aDecoder), mTask(aTask)
{ }
virtual void Run(void) {
if (mDecoder->HasShutdown()) {
CK_LOGD("Trying to dispatch to main thread after AudioDecoder has shut down");
return;
}
mTask->Run();
}
virtual void Destroy()
{
mTask->Destroy();
delete this;
}
private:
RefPtr<AudioDecoder> mDecoder;
GMPTask* mTask;
};
GetPlatform()->runonmainthread(new MaybeRunTask(this, aTask));
}