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/*
* Oreka -- A media capture and retrieval platform
*
* Copyright (C) 2005, orecx LLC
*
* http://www.orecx.com
*
* This program is free software, distributed under the terms of
* the GNU General Public License.
* Please refer to http://www.gnu.org/copyleft/gpl.html
*
*/
#define _WINSOCKAPI_ // prevents the inclusion of winsock.h
#include "Utils.h"
#include "LibSndFileFile.h"
#include "ConfigManager.h"
LibSndFileFile::LibSndFileFile(int fileFormat)
{
m_fileInfo.format = fileFormat;
m_fileInfo.frames = 0;
m_fileInfo.samplerate = 0;
m_fileInfo.channels = 0;
m_fileInfo.sections = 0;
m_fileInfo.seekable = 0;
m_pFile = NULL;
m_numChunksWritten = 0;
m_mode = READ;
m_sampleRate = 0;
}
LibSndFileFile::~LibSndFileFile()
{
Close();
}
void LibSndFileFile::Open(CStdString& filename, fileOpenModeEnum mode, bool stereo, int sampleRate)
{
if(!m_filename.Equals(filename))
{
m_filename = filename + ".wav";
}
m_mode = mode;
if(CONFIG.m_stereoRecording == true)
{
if(CONFIG.m_tapeNumChannels > 1)
{
m_fileInfo.channels = CONFIG.m_tapeNumChannels;
}
else
{
m_fileInfo.channels = 1;
}
}
else
{
m_fileInfo.channels = 1;
}
if(m_sampleRate == 0)
{
m_sampleRate = sampleRate;
m_fileInfo.samplerate = sampleRate;
}
if( (mode==WRITE) && !sf_format_check(&m_fileInfo))
{
throw(CStdString("libsndfile: Selected output format not supported"));
}
FileRecursiveMkdir(m_filename, CONFIG.m_audioFilePermissions, CONFIG.m_audioFileOwner, CONFIG.m_audioFileGroup, CONFIG.m_audioOutputPath);
int sndFileMode;
mode == READ ? sndFileMode = SFM_READ : sndFileMode = SFM_WRITE;
m_pFile = sf_open((PCSTR)m_filename, sndFileMode, &m_fileInfo);
if(!m_pFile)
{
throw(CStdString("sf_open failed, audio file could not be created:"+ m_filename));
}
}
void LibSndFileFile::WriteChunk(AudioChunkRef chunkRef)
{
if(chunkRef.get() == NULL)
{
return;
}
if(chunkRef->GetDetails()->m_numBytes == 0)
{
return;
}
if (m_pFile)
{
if( chunkRef->GetEncoding() == AlawAudio || chunkRef->GetEncoding() == UlawAudio)
{
// We have faith that whoever is producing these chunks created them
// with the same number of channels that we have opened the soundfile
// with above - this is enforced in the RtpMixer
if(chunkRef->m_numChannels > 0 && CONFIG.m_stereoRecording == true)
{
int numBytes = 0;
unsigned char *muxAudio = NULL;
unsigned char *wrPtr = NULL;
numBytes = chunkRef->GetNumSamples() * chunkRef->m_numChannels;
muxAudio = (unsigned char*)malloc(numBytes);
wrPtr = muxAudio;
if(!muxAudio)
{
CStdString exception;
exception.Format("sf_write_raw failed for stereo write: could not allocate %d bytes", numBytes);
throw(exception);
}
for(int x = 0; x < chunkRef->GetNumSamples(); x++)
{
for(int i = 0; i < chunkRef->m_numChannels; i++)
{
*wrPtr++ = (unsigned char)*((unsigned char*)(chunkRef->m_pChannelAudio[i])+x);
}
}
if(sf_write_raw(m_pFile, muxAudio, numBytes) != numBytes)
{
CStdString numChunksWrittenString = IntToString(m_numChunksWritten);
free(muxAudio);
throw(CStdString("sf_write_raw failed, audio file " + m_filename + " could not be written after " + numChunksWrittenString + " chunks written"));
}
free(muxAudio);
}
else
{
if(sf_write_raw(m_pFile, chunkRef->m_pBuffer, chunkRef->GetNumSamples()) != chunkRef->GetNumSamples())
{
CStdString numChunksWrittenString = IntToString(m_numChunksWritten);
throw(CStdString("sf_write_raw failed, audio file " + m_filename + " could not be written after " + numChunksWrittenString + " chunks written"));
}
}
}
else if (chunkRef->GetEncoding() == PcmAudio)
{
// We have faith that whoever is producing these chunks created them
// with the same number of channels that we have opened the soundfile
// with above - this is enforced in the RtpMixer
if(chunkRef->m_numChannels > 0 && CONFIG.m_stereoRecording == true)
{
int numShorts = 0;
short *muxAudio = NULL;
short *wrPtr = NULL;
numShorts = chunkRef->GetNumSamples()*chunkRef->m_numChannels;
muxAudio = (short*)calloc(numShorts, sizeof(short));
wrPtr = muxAudio;
if(!muxAudio)
{
CStdString exception;
exception.Format("sf_write_raw failed for stereo write: could not allocate %d bytes", numShorts*sizeof(short));
throw(exception);
}
for(int x = 0; x < chunkRef->GetNumSamples(); x++)
{
for(int i = 0; i < chunkRef->m_numChannels; i++)
{
*wrPtr++ = (short)*((short*)(chunkRef->m_pChannelAudio[i])+x);
}
}
if(sf_write_short(m_pFile, muxAudio, numShorts) != numShorts)
{
CStdString numChunksWrittenString = IntToString(m_numChunksWritten);
free(muxAudio);
throw(CStdString("sf_write_short failed, audio file " + m_filename + " could not be written after " + numChunksWrittenString + " chunks written"));
}
free(muxAudio);
}
else
{
if(sf_write_short(m_pFile, (short*)chunkRef->m_pBuffer, chunkRef->GetNumSamples()) != chunkRef->GetNumSamples())
{
CStdString numChunksWrittenString = IntToString(m_numChunksWritten);
throw(CStdString("sf_write_short failed, audio file " + m_filename + " could not be written after " + numChunksWrittenString + " chunks written"));
}
}
}
m_numChunksWritten++;
}
else
{
throw(CStdString("Write attempt on unopened file:")+ m_filename);
}
}
int LibSndFileFile::ReadChunkMono(AudioChunkRef& chunk)
{
unsigned int numRead = 0;
if (m_pFile)
{
chunk.reset(new AudioChunk());
short temp[8000];
numRead = sf_read_short(m_pFile, temp, 8000);
AudioChunkDetails details;
details.m_encoding = PcmAudio;
details.m_numBytes = sizeof(short)*numRead;
chunk->SetBuffer(temp, details);
}
else
{
throw(CStdString("Read attempt on unopened file:")+ m_filename);
}
return numRead;
}
void LibSndFileFile::Close()
{
if (m_pFile)
{
sf_close(m_pFile);
m_pFile = NULL;
}
}
CStdString LibSndFileFile::GetExtension()
{
return ".wav";
}
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