void MP3EncoderBladeEnc::initEncoder()
{
BE_CONFIG config;
memset(&config, 0, sizeof(config));
config.dwConfig = BE_CONFIG_LAME;
config.format.LHV1.dwStructVersion = 1;
config.format.LHV1.dwStructSize = sizeof(config);
config.format.LHV1.dwSampleRate = 44100;
config.format.LHV1.nMode = BE_MP3_MODE_JSTEREO;
config.format.LHV1.nPreset = LQP_STANDARD;
config.format.LHV1.nVbrMethod = VBR_METHOD_DEFAULT;
config.format.LHV1.bWriteVBRHeader = true;
config.format.LHV1.bEnableVBR = true;
BE_ERR err = beInitStream(&config, &m_writeSamples, &m_minOutputSize, &m_handle);
if (err != BE_ERR_SUCCESSFUL)
throwf("MP3EncoderBladeEnc: couldn't open stream (%s)", error(err).c_str());
m_writeBytes = (BufferFormat::Local.bytesPerSample() * m_writeSamples);
m_writtenBytes = 0;
m_bufferLeft = new char[m_writeBytes / 2];
m_bufferRight = new char[m_writeBytes / 2];
m_bufferOutput = new char[m_minOutputSize];
m_writeLeft = BufferFormat::Local.buf(m_bufferLeft);
m_writeRight = BufferFormat::Local.buf(m_bufferRight);
}
lame_stream * lame_wrapper::init_stream( unsigned long input_samplerate,
unsigned short output_bitrate,
unsigned short channels)
{
BE_CONFIG beConfig ={0,};
HBE_STREAM stream_handle;
memset(&beConfig,0,sizeof(beConfig)); // clear all fields
// use the LAME config structure
beConfig.dwConfig = BE_CONFIG_LAME;
// this are the default settings for testcase.wav
beConfig.format.LHV1.dwStructVersion = 1;
beConfig.format.LHV1.dwStructSize = sizeof(beConfig);
beConfig.format.LHV1.dwSampleRate = input_samplerate; // INPUT FREQUENCY
beConfig.format.LHV1.dwReSampleRate = 0; // DON"T RESAMPLE
if (channels == 2)
{
beConfig.format.LHV1.nMode = BE_MP3_MODE_JSTEREO; // OUTPUT IN STREO
} // if (channels == 2)
else if (channels ==1)
{
beConfig.format.LHV1.nMode = BE_MP3_MODE_MONO;
}
else
{
throw std::runtime_error( "mp3 output should be 1- or 2-channel");
}
beConfig.format.LHV1.dwBitrate = output_bitrate; // MINIMUM BIT RATE
beConfig.format.LHV1.nPreset = LQP_R3MIX; // QUALITY PRESET SETTING
beConfig.format.LHV1.dwMpegVersion = MPEG1; // MPEG VERSION (I or II)
beConfig.format.LHV1.dwPsyModel = 0; // USE DEFAULT PSYCHOACOUSTIC MODEL
beConfig.format.LHV1.dwEmphasis = 0; // NO EMPHASIS TURNED ON
beConfig.format.LHV1.bOriginal = TRUE; // SET ORIGINAL FLAG
beConfig.format.LHV1.bWriteVBRHeader = TRUE; // Write INFO tag
beConfig.format.LHV1.bNoRes = TRUE; // No Bit resorvoir
// Init the MP3 Stream
err = beInitStream(&beConfig, &dwSamples, &dwMP3Buffer, &hbeStream);
return NULL;
}
