media/codec2/components/flac/C2SoftFlacDec.cpp - third_party/android/platform/frameworks/av - Git at Google

 /*
  * Copyright (C) 2018 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 "C2SoftFlacDec"
 #include <log/log.h>

 #include <media/stagefright/foundation/MediaDefs.h>

 #include <C2PlatformSupport.h>
 #include <SimpleC2Interface.h>

 #include "C2SoftFlacDec.h"

 namespace android {

 namespace {

 constexpr char COMPONENT_NAME[] = "c2.android.flac.decoder";

 }  // namespace

 class C2SoftFlacDec::IntfImpl : public SimpleInterface<void>::BaseParams {
 public:
     explicit IntfImpl(const std::shared_ptr<C2ReflectorHelper> &helper)
         : SimpleInterface<void>::BaseParams(
                 helper,
                 COMPONENT_NAME,
                 C2Component::KIND_DECODER,
                 C2Component::DOMAIN_AUDIO,
                 MEDIA_MIMETYPE_AUDIO_FLAC) {
         noPrivateBuffers();
         noInputReferences();
         noOutputReferences();
         noInputLatency();
         noTimeStretch();
         setDerivedInstance(this);

         addParameter(
                 DefineParam(mAttrib, C2_PARAMKEY_COMPONENT_ATTRIBUTES)
                 .withConstValue(new C2ComponentAttributesSetting(
                     C2Component::ATTRIB_IS_TEMPORAL))
                 .build());

         addParameter(
                 DefineParam(mSampleRate, C2_PARAMKEY_SAMPLE_RATE)
                 .withDefault(new C2StreamSampleRateInfo::output(0u, 44100))
                 .withFields({C2F(mSampleRate, value).inRange(1, 655350)})
                 .withSetter((Setter<decltype(*mSampleRate)>::StrictValueWithNoDeps))
                 .build());

         addParameter(
                 DefineParam(mChannelCount, C2_PARAMKEY_CHANNEL_COUNT)
                 .withDefault(new C2StreamChannelCountInfo::output(0u, 1))
                 .withFields({C2F(mChannelCount, value).inRange(1, 8)})
                 .withSetter(Setter<decltype(*mChannelCount)>::StrictValueWithNoDeps)
                 .build());

         addParameter(
                 DefineParam(mBitrate, C2_PARAMKEY_BITRATE)
                 .withDefault(new C2StreamBitrateInfo::input(0u, 768000))
                 .withFields({C2F(mBitrate, value).inRange(1, 21000000)})
                 .withSetter(Setter<decltype(*mBitrate)>::NonStrictValueWithNoDeps)
                 .build());

         addParameter(
                 DefineParam(mInputMaxBufSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
                 .withConstValue(new C2StreamMaxBufferSizeInfo::input(0u, 32768))
                 .build());

         addParameter(
                 DefineParam(mPcmEncodingInfo, C2_PARAMKEY_PCM_ENCODING)
                 .withDefault(new C2StreamPcmEncodingInfo::output(0u, C2Config::PCM_16))
                 .withFields({C2F(mPcmEncodingInfo, value).oneOf({
                      C2Config::PCM_16,
                      // C2Config::PCM_8,
                      C2Config::PCM_FLOAT})
                 })
                 .withSetter((Setter<decltype(*mPcmEncodingInfo)>::StrictValueWithNoDeps))
                 .build());
     }

     int32_t getPcmEncodingInfo() const { return mPcmEncodingInfo->value; }

 private:
     std::shared_ptr<C2StreamSampleRateInfo::output> mSampleRate;
     std::shared_ptr<C2StreamChannelCountInfo::output> mChannelCount;
     std::shared_ptr<C2StreamBitrateInfo::input> mBitrate;
     std::shared_ptr<C2StreamMaxBufferSizeInfo::input> mInputMaxBufSize;
     std::shared_ptr<C2StreamPcmEncodingInfo::output> mPcmEncodingInfo;
 };

 C2SoftFlacDec::C2SoftFlacDec(
         const char *name,
         c2_node_id_t id,
         const std::shared_ptr<IntfImpl> &intfImpl)
     : SimpleC2Component(std::make_shared<SimpleInterface<IntfImpl>>(name, id, intfImpl)),
       mIntf(intfImpl),
       mFLACDecoder(nullptr) {
 }

 C2SoftFlacDec::~C2SoftFlacDec() {
     onRelease();
 }

 c2_status_t C2SoftFlacDec::onInit() {
     status_t err = initDecoder();
     return err == OK ? C2_OK : C2_NO_MEMORY;
 }

 c2_status_t C2SoftFlacDec::onStop() {
     if (mFLACDecoder) mFLACDecoder->flush();
     memset(&mStreamInfo, 0, sizeof(mStreamInfo));
     mHasStreamInfo = false;
     mSignalledError = false;
     mSignalledOutputEos = false;
     return C2_OK;
 }

 void C2SoftFlacDec::onReset() {
     mInputBufferCount = 0;
     (void)onStop();
 }

 void C2SoftFlacDec::onRelease() {
     mInputBufferCount = 0;
     if (mFLACDecoder) delete mFLACDecoder;
     mFLACDecoder = nullptr;
 }

 c2_status_t C2SoftFlacDec::onFlush_sm() {
     return onStop();
 }

 status_t C2SoftFlacDec::initDecoder() {
     if (mFLACDecoder) {
         delete mFLACDecoder;
     }
     mFLACDecoder = FLACDecoder::Create();
     if (!mFLACDecoder) {
         ALOGE("initDecoder: failed to create FLACDecoder");
         mSignalledError = true;
         return NO_MEMORY;
     }

     memset(&mStreamInfo, 0, sizeof(mStreamInfo));
     mHasStreamInfo = false;
     mSignalledError = false;
     mSignalledOutputEos = false;
     mInputBufferCount = 0;

     return OK;
 }

 static void fillEmptyWork(const std::unique_ptr<C2Work> &work) {
     work->worklets.front()->output.flags = work->input.flags;
     work->worklets.front()->output.buffers.clear();
     work->worklets.front()->output.ordinal = work->input.ordinal;
     work->workletsProcessed = 1u;
 }

 // (TODO) add multiframe support, in plugin and FLACDecoder.cpp
 void C2SoftFlacDec::process(
         const std::unique_ptr<C2Work> &work,
         const std::shared_ptr<C2BlockPool> &pool) {
     // Initialize output work
     work->result = C2_OK;
     work->workletsProcessed = 1u;
     work->worklets.front()->output.configUpdate.clear();
     work->worklets.front()->output.flags = work->input.flags;

     if (mSignalledError || mSignalledOutputEos) {
         work->result = C2_BAD_VALUE;
         return;
     }

     C2ReadView rView = mDummyReadView;
     size_t inOffset = 0u;
     size_t inSize = 0u;
     if (!work->input.buffers.empty()) {
         rView = work->input.buffers[0]->data().linearBlocks().front().map().get();
         inSize = rView.capacity();
         if (inSize && rView.error()) {
             ALOGE("read view map failed %d", rView.error());
             work->result = C2_CORRUPTED;
             return;
         }
     }
     bool eos = (work->input.flags & C2FrameData::FLAG_END_OF_STREAM) != 0;
     bool codecConfig = (work->input.flags & C2FrameData::FLAG_CODEC_CONFIG) != 0;

     ALOGV("in buffer attr. size %zu timestamp %d frameindex %d", inSize,
           (int)work->input.ordinal.timestamp.peeku(), (int)work->input.ordinal.frameIndex.peeku());

     if (inSize == 0) {
         fillEmptyWork(work);
         if (eos) {
             mSignalledOutputEos = true;
             ALOGV("signalled EOS");
         }
         return;
     }

     if (mInputBufferCount == 0 && !codecConfig) {
         ALOGV("First frame has to include configuration, forcing config");
         codecConfig = true;
     }

     uint8_t *input = const_cast<uint8_t *>(rView.data() + inOffset);
     if (codecConfig) {
         status_t decoderErr = mFLACDecoder->parseMetadata(input, inSize);
         if (decoderErr != OK && decoderErr != WOULD_BLOCK) {
             ALOGE("process: FLACDecoder parseMetaData returns error %d", decoderErr);
             mSignalledError = true;
             work->result = C2_CORRUPTED;
             return;
         }

         mInputBufferCount++;
         fillEmptyWork(work);
         if (eos) {
             mSignalledOutputEos = true;
             ALOGV("signalled EOS");
         }

         if (decoderErr == WOULD_BLOCK) {
             ALOGV("process: parseMetadata is Blocking, Continue %d", decoderErr);
         } else {
             mStreamInfo = mFLACDecoder->getStreamInfo();
             if (mStreamInfo.sample_rate && mStreamInfo.max_blocksize &&
                 mStreamInfo.channels) {
                 mHasStreamInfo = true;
                 C2StreamSampleRateInfo::output sampleRateInfo(
                     0u, mStreamInfo.sample_rate);
                 C2StreamChannelCountInfo::output channelCountInfo(
                     0u, mStreamInfo.channels);
                 std::vector<std::unique_ptr<C2SettingResult>> failures;
                 c2_status_t err =
                     mIntf->config({&sampleRateInfo, &channelCountInfo},
                                   C2_MAY_BLOCK, &failures);
                 if (err == OK) {
                     work->worklets.front()->output.configUpdate.push_back(
                         C2Param::Copy(sampleRateInfo));
                     work->worklets.front()->output.configUpdate.push_back(
                         C2Param::Copy(channelCountInfo));
                 } else {
                     ALOGE("Config Update failed");
                     mSignalledError = true;
                     work->result = C2_CORRUPTED;
                     return;
                 }
             }
             ALOGD("process: decoder configuration : %d Hz, %d channels, %d samples,"
                   " %d block size", mStreamInfo.sample_rate, mStreamInfo.channels,
                   (int)mStreamInfo.total_samples, mStreamInfo.max_blocksize);
         }
         return;
     }

     const bool outputFloat = mIntf->getPcmEncodingInfo() == C2Config::PCM_FLOAT;
     const size_t sampleSize = outputFloat ? sizeof(float) : sizeof(short);
     size_t outSize = mHasStreamInfo ?
             mStreamInfo.max_blocksize * mStreamInfo.channels * sampleSize
           : kMaxBlockSize * FLACDecoder::kMaxChannels * sampleSize;

     std::shared_ptr<C2LinearBlock> block;
     C2MemoryUsage usage = { C2MemoryUsage::CPU_READ, C2MemoryUsage::CPU_WRITE };
     c2_status_t err = pool->fetchLinearBlock(outSize, usage, &block);
     if (err != C2_OK) {
         ALOGE("fetchLinearBlock for Output failed with status %d", err);
         work->result = C2_NO_MEMORY;
         return;
     }
     C2WriteView wView = block->map().get();
     if (wView.error()) {
         ALOGE("write view map failed %d", wView.error());
         work->result = C2_CORRUPTED;
         return;
     }

     status_t decoderErr = mFLACDecoder->decodeOneFrame(
                             input, inSize, wView.data(), &outSize, outputFloat);
     if (decoderErr != OK) {
         ALOGE("process: FLACDecoder decodeOneFrame returns error %d", decoderErr);
         mSignalledError = true;
         work->result = C2_CORRUPTED;
         return;
     }

     mInputBufferCount++;
     ALOGV("out buffer attr. size %zu", outSize);
     work->worklets.front()->output.flags = work->input.flags;
     work->worklets.front()->output.buffers.clear();
     work->worklets.front()->output.buffers.push_back(createLinearBuffer(block, 0, outSize));
     work->worklets.front()->output.ordinal = work->input.ordinal;
     if (eos) {
         mSignalledOutputEos = true;
         ALOGV("signalled EOS");
     }
 }

 c2_status_t C2SoftFlacDec::drain(
         uint32_t drainMode,
         const std::shared_ptr<C2BlockPool> &pool) {
     (void) pool;
     if (drainMode == NO_DRAIN) {
         ALOGW("drain with NO_DRAIN: no-op");
         return C2_OK;
     }
     if (drainMode == DRAIN_CHAIN) {
         ALOGW("DRAIN_CHAIN not supported");
         return C2_OMITTED;
     }

     if (mFLACDecoder) mFLACDecoder->flush();

     return C2_OK;
 }

 class C2SoftFlacDecFactory : public C2ComponentFactory {
 public:
     C2SoftFlacDecFactory() : mHelper(std::static_pointer_cast<C2ReflectorHelper>(
             GetCodec2PlatformComponentStore()->getParamReflector())) {
     }

     virtual c2_status_t createComponent(
             c2_node_id_t id,
             std::shared_ptr<C2Component>* const component,
             std::function<void(C2Component*)> deleter) override {
         *component = std::shared_ptr<C2Component>(
                 new C2SoftFlacDec(COMPONENT_NAME,
                                       id,
                                       std::make_shared<C2SoftFlacDec::IntfImpl>(mHelper)),
                 deleter);
         return C2_OK;
     }

     virtual c2_status_t createInterface(
             c2_node_id_t id,
             std::shared_ptr<C2ComponentInterface>* const interface,
             std::function<void(C2ComponentInterface*)> deleter) override {
         *interface = std::shared_ptr<C2ComponentInterface>(
                 new SimpleInterface<C2SoftFlacDec::IntfImpl>(
                         COMPONENT_NAME, id, std::make_shared<C2SoftFlacDec::IntfImpl>(mHelper)),
                 deleter);
         return C2_OK;
     }

     virtual ~C2SoftFlacDecFactory() override = default;

 private:
     std::shared_ptr<C2ReflectorHelper> mHelper;
 };

 }  // namespace android

 extern "C" ::C2ComponentFactory* CreateCodec2Factory() {
     ALOGV("in %s", __func__);
     return new ::android::C2SoftFlacDecFactory();
 }

 extern "C" void DestroyCodec2Factory(::C2ComponentFactory* factory) {
     ALOGV("in %s", __func__);
     delete factory;
 }
	/*
	* Copyright (C) 2018 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 "C2SoftFlacDec"
	#include <log/log.h>

	#include <media/stagefright/foundation/MediaDefs.h>

	#include <C2PlatformSupport.h>
	#include <SimpleC2Interface.h>

	#include "C2SoftFlacDec.h"

	namespace android {

	namespace {

	constexpr char COMPONENT_NAME[] = "c2.android.flac.decoder";

	} // namespace

	class C2SoftFlacDec::IntfImpl : public SimpleInterface<void>::BaseParams {
	public:
	explicit IntfImpl(const std::shared_ptr<C2ReflectorHelper> &helper)
	: SimpleInterface<void>::BaseParams(
	helper,
	COMPONENT_NAME,
	C2Component::KIND_DECODER,
	C2Component::DOMAIN_AUDIO,
	MEDIA_MIMETYPE_AUDIO_FLAC) {
	noPrivateBuffers();
	noInputReferences();
	noOutputReferences();
	noInputLatency();
	noTimeStretch();
	setDerivedInstance(this);

	addParameter(
	DefineParam(mAttrib, C2_PARAMKEY_COMPONENT_ATTRIBUTES)
	.withConstValue(new C2ComponentAttributesSetting(
	C2Component::ATTRIB_IS_TEMPORAL))
	.build());

	addParameter(
	DefineParam(mSampleRate, C2_PARAMKEY_SAMPLE_RATE)
	.withDefault(new C2StreamSampleRateInfo::output(0u, 44100))
	.withFields({C2F(mSampleRate, value).inRange(1, 655350)})
	.withSetter((Setter<decltype(*mSampleRate)>::StrictValueWithNoDeps))
	.build());

	addParameter(
	DefineParam(mChannelCount, C2_PARAMKEY_CHANNEL_COUNT)
	.withDefault(new C2StreamChannelCountInfo::output(0u, 1))
	.withFields({C2F(mChannelCount, value).inRange(1, 8)})
	.withSetter(Setter<decltype(*mChannelCount)>::StrictValueWithNoDeps)
	.build());

	addParameter(
	DefineParam(mBitrate, C2_PARAMKEY_BITRATE)
	.withDefault(new C2StreamBitrateInfo::input(0u, 768000))
	.withFields({C2F(mBitrate, value).inRange(1, 21000000)})
	.withSetter(Setter<decltype(*mBitrate)>::NonStrictValueWithNoDeps)
	.build());

	addParameter(
	DefineParam(mInputMaxBufSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
	.withConstValue(new C2StreamMaxBufferSizeInfo::input(0u, 32768))
	.build());

	addParameter(
	DefineParam(mPcmEncodingInfo, C2_PARAMKEY_PCM_ENCODING)
	.withDefault(new C2StreamPcmEncodingInfo::output(0u, C2Config::PCM_16))
	.withFields({C2F(mPcmEncodingInfo, value).oneOf({
	C2Config::PCM_16,
	// C2Config::PCM_8,
	C2Config::PCM_FLOAT})
	})
	.withSetter((Setter<decltype(*mPcmEncodingInfo)>::StrictValueWithNoDeps))
	.build());
	}

	int32_t getPcmEncodingInfo() const { return mPcmEncodingInfo->value; }

	private:
	std::shared_ptr<C2StreamSampleRateInfo::output> mSampleRate;
	std::shared_ptr<C2StreamChannelCountInfo::output> mChannelCount;
	std::shared_ptr<C2StreamBitrateInfo::input> mBitrate;
	std::shared_ptr<C2StreamMaxBufferSizeInfo::input> mInputMaxBufSize;
	std::shared_ptr<C2StreamPcmEncodingInfo::output> mPcmEncodingInfo;
	};

	C2SoftFlacDec::C2SoftFlacDec(
	const char *name,
	c2_node_id_t id,
	const std::shared_ptr<IntfImpl> &intfImpl)
	: SimpleC2Component(std::make_shared<SimpleInterface<IntfImpl>>(name, id, intfImpl)),
	mIntf(intfImpl),
	mFLACDecoder(nullptr) {
	}

	C2SoftFlacDec::~C2SoftFlacDec() {
	onRelease();
	}

	c2_status_t C2SoftFlacDec::onInit() {
	status_t err = initDecoder();
	return err == OK ? C2_OK : C2_NO_MEMORY;
	}

	c2_status_t C2SoftFlacDec::onStop() {
	if (mFLACDecoder) mFLACDecoder->flush();
	memset(&mStreamInfo, 0, sizeof(mStreamInfo));
	mHasStreamInfo = false;
	mSignalledError = false;
	mSignalledOutputEos = false;
	return C2_OK;
	}

	void C2SoftFlacDec::onReset() {
	mInputBufferCount = 0;
	(void)onStop();
	}

	void C2SoftFlacDec::onRelease() {
	mInputBufferCount = 0;
	if (mFLACDecoder) delete mFLACDecoder;
	mFLACDecoder = nullptr;
	}

	c2_status_t C2SoftFlacDec::onFlush_sm() {
	return onStop();
	}

	status_t C2SoftFlacDec::initDecoder() {
	if (mFLACDecoder) {
	delete mFLACDecoder;
	}
	mFLACDecoder = FLACDecoder::Create();
	if (!mFLACDecoder) {
	ALOGE("initDecoder: failed to create FLACDecoder");
	mSignalledError = true;
	return NO_MEMORY;
	}

	memset(&mStreamInfo, 0, sizeof(mStreamInfo));
	mHasStreamInfo = false;
	mSignalledError = false;
	mSignalledOutputEos = false;
	mInputBufferCount = 0;

	return OK;
	}

	static void fillEmptyWork(const std::unique_ptr<C2Work> &work) {
	work->worklets.front()->output.flags = work->input.flags;
	work->worklets.front()->output.buffers.clear();
	work->worklets.front()->output.ordinal = work->input.ordinal;
	work->workletsProcessed = 1u;
	}

	// (TODO) add multiframe support, in plugin and FLACDecoder.cpp
	void C2SoftFlacDec::process(
	const std::unique_ptr<C2Work> &work,
	const std::shared_ptr<C2BlockPool> &pool) {
	// Initialize output work
	work->result = C2_OK;
	work->workletsProcessed = 1u;
	work->worklets.front()->output.configUpdate.clear();
	work->worklets.front()->output.flags = work->input.flags;

	if (mSignalledError \|\| mSignalledOutputEos) {
	work->result = C2_BAD_VALUE;
	return;
	}

	C2ReadView rView = mDummyReadView;
	size_t inOffset = 0u;
	size_t inSize = 0u;
	if (!work->input.buffers.empty()) {
	rView = work->input.buffers[0]->data().linearBlocks().front().map().get();
	inSize = rView.capacity();
	if (inSize && rView.error()) {
	ALOGE("read view map failed %d", rView.error());
	work->result = C2_CORRUPTED;
	return;
	}
	}
	bool eos = (work->input.flags & C2FrameData::FLAG_END_OF_STREAM) != 0;
	bool codecConfig = (work->input.flags & C2FrameData::FLAG_CODEC_CONFIG) != 0;

	ALOGV("in buffer attr. size %zu timestamp %d frameindex %d", inSize,
	(int)work->input.ordinal.timestamp.peeku(), (int)work->input.ordinal.frameIndex.peeku());

	if (inSize == 0) {
	fillEmptyWork(work);
	if (eos) {
	mSignalledOutputEos = true;
	ALOGV("signalled EOS");
	}
	return;
	}

	if (mInputBufferCount == 0 && !codecConfig) {
	ALOGV("First frame has to include configuration, forcing config");
	codecConfig = true;
	}

	uint8_t input = const_cast<uint8_t >(rView.data() + inOffset);
	if (codecConfig) {
	status_t decoderErr = mFLACDecoder->parseMetadata(input, inSize);
	if (decoderErr != OK && decoderErr != WOULD_BLOCK) {
	ALOGE("process: FLACDecoder parseMetaData returns error %d", decoderErr);
	mSignalledError = true;
	work->result = C2_CORRUPTED;
	return;
	}

	mInputBufferCount++;
	fillEmptyWork(work);
	if (eos) {
	mSignalledOutputEos = true;
	ALOGV("signalled EOS");
	}

	if (decoderErr == WOULD_BLOCK) {
	ALOGV("process: parseMetadata is Blocking, Continue %d", decoderErr);
	} else {
	mStreamInfo = mFLACDecoder->getStreamInfo();
	if (mStreamInfo.sample_rate && mStreamInfo.max_blocksize &&
	mStreamInfo.channels) {
	mHasStreamInfo = true;
	C2StreamSampleRateInfo::output sampleRateInfo(
	0u, mStreamInfo.sample_rate);
	C2StreamChannelCountInfo::output channelCountInfo(
	0u, mStreamInfo.channels);
	std::vector<std::unique_ptr<C2SettingResult>> failures;
	c2_status_t err =
	mIntf->config({&sampleRateInfo, &channelCountInfo},
	C2_MAY_BLOCK, &failures);
	if (err == OK) {
	work->worklets.front()->output.configUpdate.push_back(
	C2Param::Copy(sampleRateInfo));
	work->worklets.front()->output.configUpdate.push_back(
	C2Param::Copy(channelCountInfo));
	} else {
	ALOGE("Config Update failed");
	mSignalledError = true;
	work->result = C2_CORRUPTED;
	return;
	}
	}
	ALOGD("process: decoder configuration : %d Hz, %d channels, %d samples,"
	" %d block size", mStreamInfo.sample_rate, mStreamInfo.channels,
	(int)mStreamInfo.total_samples, mStreamInfo.max_blocksize);
	}
	return;
	}

	const bool outputFloat = mIntf->getPcmEncodingInfo() == C2Config::PCM_FLOAT;
	const size_t sampleSize = outputFloat ? sizeof(float) : sizeof(short);
	size_t outSize = mHasStreamInfo ?
	mStreamInfo.max_blocksize * mStreamInfo.channels * sampleSize
	: kMaxBlockSize * FLACDecoder::kMaxChannels * sampleSize;

	std::shared_ptr<C2LinearBlock> block;
	C2MemoryUsage usage = { C2MemoryUsage::CPU_READ, C2MemoryUsage::CPU_WRITE };
	c2_status_t err = pool->fetchLinearBlock(outSize, usage, &block);
	if (err != C2_OK) {
	ALOGE("fetchLinearBlock for Output failed with status %d", err);
	work->result = C2_NO_MEMORY;
	return;
	}
	C2WriteView wView = block->map().get();
	if (wView.error()) {
	ALOGE("write view map failed %d", wView.error());
	work->result = C2_CORRUPTED;
	return;
	}

	status_t decoderErr = mFLACDecoder->decodeOneFrame(
	input, inSize, wView.data(), &outSize, outputFloat);
	if (decoderErr != OK) {
	ALOGE("process: FLACDecoder decodeOneFrame returns error %d", decoderErr);
	mSignalledError = true;
	work->result = C2_CORRUPTED;
	return;
	}

	mInputBufferCount++;
	ALOGV("out buffer attr. size %zu", outSize);
	work->worklets.front()->output.flags = work->input.flags;
	work->worklets.front()->output.buffers.clear();
	work->worklets.front()->output.buffers.push_back(createLinearBuffer(block, 0, outSize));
	work->worklets.front()->output.ordinal = work->input.ordinal;
	if (eos) {
	mSignalledOutputEos = true;
	ALOGV("signalled EOS");
	}
	}

	c2_status_t C2SoftFlacDec::drain(
	uint32_t drainMode,
	const std::shared_ptr<C2BlockPool> &pool) {
	(void) pool;
	if (drainMode == NO_DRAIN) {
	ALOGW("drain with NO_DRAIN: no-op");
	return C2_OK;
	}
	if (drainMode == DRAIN_CHAIN) {
	ALOGW("DRAIN_CHAIN not supported");
	return C2_OMITTED;
	}

	if (mFLACDecoder) mFLACDecoder->flush();

	return C2_OK;
	}

	class C2SoftFlacDecFactory : public C2ComponentFactory {
	public:
	C2SoftFlacDecFactory() : mHelper(std::static_pointer_cast<C2ReflectorHelper>(
	GetCodec2PlatformComponentStore()->getParamReflector())) {
	}

	virtual c2_status_t createComponent(
	c2_node_id_t id,
	std::shared_ptr<C2Component>* const component,
	std::function<void(C2Component*)> deleter) override {
	*component = std::shared_ptr<C2Component>(
	new C2SoftFlacDec(COMPONENT_NAME,
	id,
	std::make_shared<C2SoftFlacDec::IntfImpl>(mHelper)),
	deleter);
	return C2_OK;
	}

	virtual c2_status_t createInterface(
	c2_node_id_t id,
	std::shared_ptr<C2ComponentInterface>* const interface,
	std::function<void(C2ComponentInterface*)> deleter) override {
	*interface = std::shared_ptr<C2ComponentInterface>(
	new SimpleInterface<C2SoftFlacDec::IntfImpl>(
	COMPONENT_NAME, id, std::make_shared<C2SoftFlacDec::IntfImpl>(mHelper)),
	deleter);
	return C2_OK;
	}

	virtual ~C2SoftFlacDecFactory() override = default;

	private:
	std::shared_ptr<C2ReflectorHelper> mHelper;
	};

	} // namespace android

	extern "C" ::C2ComponentFactory* CreateCodec2Factory() {
	ALOGV("in %s", __func__);
	return new ::android::C2SoftFlacDecFactory();
	}

	extern "C" void DestroyCodec2Factory(::C2ComponentFactory* factory) {
	ALOGV("in %s", __func__);
	delete factory;
	}