sm64pc/tools/audiofile-0.3.6/libaudiofile/modules/ALAC.cpp

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2020-05-05 12:15:53 +00:00
/*
Audio File Library
Copyright (C) 2013 Michael Pruett <michael@68k.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "ALAC.h"
#include "Buffer.h"
#include "Compiler.h"
#include "File.h"
#include "FileModule.h"
#include "PacketTable.h"
#include "SimpleModule.h"
#include "Track.h"
#include "afinternal.h"
#include "audiofile.h"
#include "byteorder.h"
#include "compression.h"
#include "units.h"
#include "util.h"
#include "../alac/ALACBitUtilities.h"
#include "../alac/ALACDecoder.h"
#include "../alac/ALACEncoder.h"
#include <assert.h>
#include <string.h>
enum
{
kALACFormatFlag_16BitSourceData = 1,
kALACFormatFlag_20BitSourceData = 2,
kALACFormatFlag_24BitSourceData = 3,
kALACFormatFlag_32BitSourceData = 4
};
class ALAC : public FileModule
{
public:
static ALAC *createDecompress(Track *, File *, bool canSeek,
bool headerless, AFframecount *chunkFrames);
static ALAC *createCompress(Track *, File *, bool canSeek,
bool headerless, AFframecount *chunkFrames);
virtual ~ALAC();
virtual const char *name() const OVERRIDE
{
return mode() == Compress ? "alac_compress" : "alac_decompress";
}
virtual void describe() OVERRIDE;
virtual void runPull() OVERRIDE;
virtual void reset1() OVERRIDE;
virtual void reset2() OVERRIDE;
virtual void runPush() OVERRIDE;
virtual void sync1() OVERRIDE;
virtual void sync2() OVERRIDE;
virtual int bufferSize() const OVERRIDE;
private:
AFframecount m_framesToIgnore;
AFfileoffset m_savedPositionNextFrame;
AFframecount m_savedNextFrame;
SharedPtr<Buffer> m_codecData;
ALACDecoder *m_decoder;
ALACEncoder *m_encoder;
int m_currentPacket;
ALAC(Mode mode, Track *track, File *fh, bool canSeek, Buffer *codecData);
void initDecoder();
void initEncoder();
AudioFormatDescription outputFormat() const;
};
ALAC::ALAC(Mode mode, Track *track, File *fh, bool canSeek, Buffer *codecData) :
FileModule(mode, track, fh, canSeek),
m_savedPositionNextFrame(-1),
m_savedNextFrame(-1),
m_codecData(codecData),
m_decoder(NULL),
m_encoder(NULL),
m_currentPacket(0)
{
if (mode == Decompress)
initDecoder();
else
initEncoder();
}
ALAC::~ALAC()
{
delete m_decoder;
delete m_encoder;
}
void ALAC::initDecoder()
{
m_decoder = new ALACDecoder();
m_decoder->Init(m_codecData->data(), m_codecData->size());
}
void ALAC::initEncoder()
{
m_encoder = new ALACEncoder();
m_encoder->SetFrameSize(m_track->f.framesPerPacket);
m_encoder->InitializeEncoder(outputFormat());
uint32_t cookieSize = m_encoder->GetMagicCookieSize(m_track->f.channelCount);
assert(cookieSize == m_codecData->size());
m_encoder->GetMagicCookie(m_codecData->data(), &cookieSize);
void *v = NULL;
_af_pv_getptr(m_track->f.compressionParams, _AF_CODEC_DATA, &v);
::memcpy(v, m_codecData->data(), cookieSize);
}
AudioFormatDescription ALAC::outputFormat() const
{
AudioFormatDescription outputFormat;
outputFormat.mSampleRate = m_track->f.sampleRate;
outputFormat.mFormatID = kALACFormatAppleLossless;
switch (m_track->f.sampleWidth)
{
case 16:
outputFormat.mFormatFlags = kALACFormatFlag_16BitSourceData; break;
case 20:
outputFormat.mFormatFlags = kALACFormatFlag_20BitSourceData; break;
case 24:
outputFormat.mFormatFlags = kALACFormatFlag_24BitSourceData; break;
case 32:
outputFormat.mFormatFlags = kALACFormatFlag_32BitSourceData; break;
default:
outputFormat.mFormatFlags = 0; break;
}
outputFormat.mFramesPerPacket = m_track->f.framesPerPacket;
outputFormat.mChannelsPerFrame = m_track->f.channelCount;
outputFormat.mBytesPerPacket = 0;
outputFormat.mBytesPerFrame = 0;
outputFormat.mBitsPerChannel = 0;
outputFormat.mReserved = 0;
return outputFormat;
}
void ALAC::describe()
{
m_outChunk->f.byteOrder = _AF_BYTEORDER_NATIVE;
m_outChunk->f.compressionType = AF_COMPRESSION_NONE;
m_outChunk->f.compressionParams = AU_NULL_PVLIST;
}
ALAC *ALAC::createDecompress(Track *track, File *fh,
bool canSeek, bool headerless, AFframecount *chunkFrames)
{
assert(fh->tell() == track->fpos_first_frame);
AUpvlist pv = (AUpvlist) track->f.compressionParams;
long codecDataSize;
if (!_af_pv_getlong(pv, _AF_CODEC_DATA_SIZE, &codecDataSize))
{
_af_error(AF_BAD_CODEC_CONFIG, "codec data size not set");
return NULL;
}
SharedPtr<Buffer> codecData = new Buffer(codecDataSize);
void *data;
if (!_af_pv_getptr(pv, _AF_CODEC_DATA, &data))
{
_af_error(AF_BAD_CODEC_CONFIG, "codec data not set");
return NULL;
}
memcpy(codecData->data(), data, codecDataSize);
*chunkFrames = track->f.framesPerPacket;
return new ALAC(Decompress, track, fh, canSeek, codecData.get());
}
ALAC *ALAC::createCompress(Track *track, File *fh,
bool canSeek, bool headerless, AFframecount *chunkFrames)
{
assert(fh->tell() == track->fpos_first_frame);
AUpvlist pv = (AUpvlist) track->f.compressionParams;
long codecDataSize;
if (!_af_pv_getlong(pv, _AF_CODEC_DATA_SIZE, &codecDataSize))
{
_af_error(AF_BAD_CODEC_CONFIG, "codec data size not set");
return NULL;
}
SharedPtr<Buffer> codecData = new Buffer(codecDataSize);
void *data;
if (!_af_pv_getptr(pv, _AF_CODEC_DATA, &data))
{
_af_error(AF_BAD_CODEC_CONFIG, "codec data not set");
return NULL;
}
memcpy(codecData->data(), data, codecDataSize);
*chunkFrames = track->f.framesPerPacket;
return new ALAC(Compress, track, fh, canSeek, codecData.get());
}
void ALAC::runPull()
{
SharedPtr<PacketTable> packetTable = m_track->m_packetTable;
if (m_currentPacket >= static_cast<int>(packetTable->numPackets()))
{
m_outChunk->frameCount = 0;
return;
}
assert(m_currentPacket < static_cast<int>(packetTable->numPackets()));
ssize_t bytesPerPacket = packetTable->bytesPerPacket(m_currentPacket);
assert(bytesPerPacket <= bufferSize());
if (read(m_inChunk->buffer, bytesPerPacket) < bytesPerPacket)
{
reportReadError(0, m_track->f.framesPerPacket);
return;
}
BitBuffer bitBuffer;
BitBufferInit(&bitBuffer, static_cast<uint8_t *>(m_inChunk->buffer),
bytesPerPacket);
uint32_t numFrames;
m_decoder->Decode(&bitBuffer, static_cast<uint8_t *>(m_outChunk->buffer),
m_track->f.framesPerPacket, m_track->f.channelCount, &numFrames);
m_outChunk->frameCount = numFrames;
m_currentPacket++;
}
void ALAC::reset1()
{
AFframecount nextFrame = m_track->nextfframe;
m_currentPacket = nextFrame / m_track->f.framesPerPacket;
m_track->nextfframe = m_currentPacket * m_track->f.framesPerPacket;
m_framesToIgnore = nextFrame - m_track->nextfframe;
}
void ALAC::reset2()
{
m_track->fpos_next_frame = m_track->fpos_first_frame +
m_track->m_packetTable->startOfPacket(m_currentPacket);
m_track->frames2ignore += m_framesToIgnore;
}
int ALAC::bufferSize() const
{
return m_track->f.framesPerPacket * m_track->f.channelCount *
((10 + m_track->f.sampleWidth) / 8) + 1;
}
void ALAC::runPush()
{
AudioFormatDescription inputFormat;
inputFormat.mSampleRate = m_track->f.sampleRate;
inputFormat.mFormatID = kALACFormatLinearPCM;
inputFormat.mFormatFlags = kALACFormatFlagsNativeEndian;
inputFormat.mBytesPerPacket = _af_format_frame_size_uncompressed(&m_track->f, false);
inputFormat.mFramesPerPacket = 1;
inputFormat.mBytesPerFrame = _af_format_frame_size_uncompressed(&m_track->f, false);
inputFormat.mChannelsPerFrame = m_track->f.channelCount;
inputFormat.mBitsPerChannel = m_track->f.sampleWidth;
inputFormat.mReserved = 0;
int32_t numBytes = m_inChunk->frameCount * inputFormat.mBytesPerFrame;
int32_t result = m_encoder->Encode(inputFormat, outputFormat(),
static_cast<uint8_t *>(m_inChunk->buffer),
static_cast<uint8_t *>(m_outChunk->buffer),
&numBytes);
if (result)
{
_af_error(AF_BAD_CODEC_STATE, "error encoding ALAC audio data");
m_track->filemodhappy = false;
return;
}
assert(numBytes <= bufferSize());
ssize_t bytesWritten = write(m_outChunk->buffer, numBytes);
if (bytesWritten != numBytes)
{
reportWriteError(0, m_track->f.framesPerPacket);
return;
}
PacketTable *packetTable = m_track->m_packetTable.get();
packetTable->append(numBytes);
packetTable->setNumValidFrames(packetTable->numValidFrames() +
m_inChunk->frameCount);
}
void ALAC::sync1()
{
m_savedPositionNextFrame = m_track->fpos_next_frame;
m_savedNextFrame = m_track->nextfframe;
}
void ALAC::sync2()
{
assert(!canSeek() || (tell() == m_track->fpos_next_frame));
m_track->fpos_after_data = tell();
m_track->fpos_next_frame = m_savedPositionNextFrame;
m_track->nextfframe = m_savedNextFrame;
}
bool _af_alac_format_ok (AudioFormat *f)
{
if (f->channelCount > kALACMaxChannels)
{
_af_error(AF_BAD_CHANNELS,
"ALAC compression supports a maximum of 8 channels");
return false;
}
if (f->sampleFormat != AF_SAMPFMT_TWOSCOMP)
{
_af_error(AF_BAD_COMPRESSION,
"ALAC compression requires signed integer audio data");
return false;
}
if (f->sampleWidth != 16 &&
f->sampleWidth != 20 &&
f->sampleWidth != 24 &&
f->sampleWidth != 32)
{
_af_error(AF_BAD_WIDTH,
"ALAC compression requires 16, 20, 24, or 32 bits per sample");
return false;
}
if (f->byteOrder != _AF_BYTEORDER_NATIVE)
{
_af_error(AF_BAD_COMPRESSION,
"ALAC compression requires native-endian format");
f->byteOrder = _AF_BYTEORDER_NATIVE;
}
return true;
}
FileModule *_af_alac_init_decompress (Track *track, File *fh,
bool canSeek, bool headerless, AFframecount *chunkFrames)
{
return ALAC::createDecompress(track, fh, canSeek, headerless, chunkFrames);
}
FileModule *_af_alac_init_compress (Track *track, File *fh,
bool canSeek, bool headerless, AFframecount *chunkFrames)
{
return ALAC::createCompress(track, fh, canSeek, headerless, chunkFrames);
}