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/*
* Copyright (C) 2012 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.
*/
#ifndef SOFT_FLAC_ENC_H_
#define SOFT_FLAC_ENC_H_
#include "SimpleSoftOMXComponent.h"
#include "FLAC/stream_encoder.h"
// use this symbol to have the first output buffer start with FLAC frame header so a dump of
// all the output buffers can be opened as a .flac file
//#define WRITE_FLAC_HEADER_IN_FIRST_BUFFER
namespace android {
struct SoftFlacEncoder : public SimpleSoftOMXComponent {
SoftFlacEncoder(const char *name,
const OMX_CALLBACKTYPE *callbacks,
OMX_PTR appData,
OMX_COMPONENTTYPE **component);
virtual OMX_ERRORTYPE initCheck() const;
protected:
virtual ~SoftFlacEncoder();
virtual OMX_ERRORTYPE internalGetParameter(
OMX_INDEXTYPE index, OMX_PTR params);
virtual OMX_ERRORTYPE internalSetParameter(
OMX_INDEXTYPE index, const OMX_PTR params);
virtual void onQueueFilled(OMX_U32 portIndex);
private:
enum {
kNumBuffers = 2,
kMaxNumSamplesPerFrame = 1152,
kMaxInputBufferSize = kMaxNumSamplesPerFrame * sizeof(int16_t) * 2,
kMaxOutputBufferSize = 65536, //TODO check if this can be reduced
};
bool mSignalledError;
OMX_U32 mNumChannels;
OMX_U32 mSampleRate;
OMX_U32 mCompressionLevel;
// should the data received by the callback be written to the output port
bool mEncoderWriteData;
bool mEncoderReturnedEncodedData;
size_t mEncoderReturnedNbBytes;
OMX_TICKS mCurrentInputTimeStamp;
FLAC__StreamEncoder* mFlacStreamEncoder;
void initPorts();
OMX_ERRORTYPE configureEncoder();
// FLAC encoder callbacks
// maps to encoderEncodeFlac()
static FLAC__StreamEncoderWriteStatus flacEncoderWriteCallback(
const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[],
size_t bytes, unsigned samples, unsigned current_frame, void *client_data);
FLAC__StreamEncoderWriteStatus onEncodedFlacAvailable(
const FLAC__byte buffer[],
size_t bytes, unsigned samples, unsigned current_frame);
// FLAC takes samples aligned on 32bit boundaries, use this buffer for the conversion
// before passing the input data to the encoder
FLAC__int32* mInputBufferPcm32;
#ifdef WRITE_FLAC_HEADER_IN_FIRST_BUFFER
unsigned mHeaderOffset;
bool mWroteHeader;
char mHeader[128];
#endif
DISALLOW_EVIL_CONSTRUCTORS(SoftFlacEncoder);
};
} // namespace android
#endif // SOFT_FLAC_ENC_H_
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