// Constructor:
public LHV1(LibsndfileWrapper.SF_INFO soundInfo, uint mp3bitrate)
{
// Error if not WAV, 16bit
if (soundInfo.format !=
((int)LibsndfileWrapper.soundFormat.SF_FORMAT_WAV |
(int)LibsndfileWrapper.soundFormat.SF_FORMAT_PCM_16) )
{
throw new ArgumentOutOfRangeException(
"format",
"Only WAV 16 bit uncompressed supported. " +
"You gave format " + soundInfo.format);
}
dwStructVersion = 1;
dwStructSize = (uint)Marshal.SizeOf(typeof(BE_CONFIG));
// Handle sample rate
switch (soundInfo.samplerate)
{
case 16000 :
case 22050 :
case 24000 :
dwMpegVersion = MPEG2;
break;
case 32000 :
case 44100 :
case 48000 :
dwMpegVersion = MPEG1;
break;
default :
throw new ArgumentOutOfRangeException(
"format", "Sample rate " +
soundInfo.samplerate + " not supported");
}
dwSampleRate = (uint)soundInfo.samplerate;
dwReSampleRate = 0;
// Handle channels
switch (soundInfo.channels)
{
case 1 :
mpgmode = mpeg_mode.MONO;
break;
case 2 :
mpgmode = mpeg_mode.STEREO;
break;
default:
throw new ArgumentOutOfRangeException(
"format",
"Invalid number of channels:" + soundInfo.channels);
}
// Handle bit rate
switch (mp3bitrate)
{
case 32 :
case 40 :
case 48 :
case 56 :
case 64 :
case 80 :
case 96 :
case 112 :
case 128 :
// Allowed bit rates in MPEG1 and MPEG2:
case 160 :
break;
case 192 :
case 224 :
case 256 :
// Allowed only in MPEG1:
case 320 :
if (dwMpegVersion != MPEG1)
{
throw new ArgumentOutOfRangeException(
"mp3bitrate", "Incompatible bit rate:"+mp3bitrate);
}
break;
case 8 :
case 16 :
case 24 :
// Allowed only in MPEG2:
case 144 :
if (dwMpegVersion != MPEG2)
{
throw new ArgumentOutOfRangeException(
"mp3bitrate", "Incompatible bit rate:"+mp3bitrate);
}
break;
default :
throw new ArgumentOutOfRangeException(
"mp3bitrate", "Can't support bit rate");
}
// MINIMUM BIT RATE:
dwBitrate = mp3bitrate;
// QUALITY PRESET SETTING:
nPreset = LAME_QUALITY_PRESET.LQP_NORMAL_QUALITY;
// USE DEFAULT PSYCHOACOUSTIC MODEL:
dwPsyModel = 0;
// NO EMPHASIS TURNED ON:
dwEmphasis = 0;
// SET ORIGINAL FLAG:
bOriginal = 1;
bWriteVBRHeader = 0;
// No bit reservoir:
bNoRes = 0;
bCopyright = 0;
bCRC = 0;
bEnableVBR = 0;
bPrivate = 0;
bStrictIso = 0;
dwMaxBitrate = 0;
dwVbrAbr_bps = 0;
nQuality = 0;
nVbrMethod = VBRMETHOD.VBR_METHOD_NONE;
nVBRQuality = 0;
}
LHV1(LibsndfileWrapper.SF_INFO soundInfo, uint mp3bitrate)
{
// Error if not WAV, 16bit
if (soundInfo.format !=
((int)LibsndfileWrapper.soundFormat.SF_FORMAT_WAV |
(int)LibsndfileWrapper.soundFormat.SF_FORMAT_PCM_16))
{
throw new ArgumentOutOfRangeException(
"format",
"Only WAV 16 bit uncompressed supported. " +
"You gave format " + soundInfo.format);
}
dwStructVersion = 1;
dwStructSize = (uint)Marshal.SizeOf(typeof(BE_CONFIG));
// Handle sample rate
switch (soundInfo.samplerate)
{
case 16000:
case 22050:
case 24000:
dwMpegVersion = MPEG2;
break;
case 32000:
case 44100:
case 48000:
dwMpegVersion = MPEG1;
break;
default:
throw new ArgumentOutOfRangeException(
"format", "Sample rate " +
soundInfo.samplerate + " not supported");
}
dwSampleRate = (uint)soundInfo.samplerate;
dwReSampleRate = 0;
// Handle channels
switch (soundInfo.channels)
{
case 1:
mpgmode = mpeg_mode.MONO;
break;
case 2:
mpgmode = mpeg_mode.STEREO;
break;
default:
throw new ArgumentOutOfRangeException(
"format",
"Invalid number of channels:" + soundInfo.channels);
}
// Handle bit rate
switch (mp3bitrate)
{
case 32:
case 40:
case 48:
case 56:
case 64:
case 80:
case 96:
case 112:
case 128:
// Allowed bit rates in MPEG1 and MPEG2:
case 160:
break;
case 192:
case 224:
case 256:
// Allowed only in MPEG1:
case 320:
if (dwMpegVersion != MPEG1)
{
throw new ArgumentOutOfRangeException(
"mp3bitrate", "Incompatible bit rate:" + mp3bitrate);
}
break;
case 8:
case 16:
case 24:
// Allowed only in MPEG2:
case 144:
if (dwMpegVersion != MPEG2)
{
throw new ArgumentOutOfRangeException(
"mp3bitrate", "Incompatible bit rate:" + mp3bitrate);
}
break;
default:
throw new ArgumentOutOfRangeException(
"mp3bitrate", "Can't support bit rate");
}
// MINIMUM BIT RATE:
dwBitrate = mp3bitrate;
// QUALITY PRESET SETTING:
nPreset = LAME_QUALITY_PRESET.LQP_NORMAL_QUALITY;
// USE DEFAULT PSYCHOACOUSTIC MODEL:
dwPsyModel = 0;
// NO EMPHASIS TURNED ON:
dwEmphasis = 0;
// SET ORIGINAL FLAG:
bOriginal = 1;
bWriteVBRHeader = 0;
// No bit reservoir:
bNoRes = 0;
bCopyright = 0;
bCRC = 0;
bEnableVBR = 0;
bPrivate = 0;
bStrictIso = 0;
dwMaxBitrate = 0;
dwVbrAbr_bps = 0;
nQuality = 0;
nVbrMethod = VBRMETHOD.VBR_METHOD_NONE;
nVBRQuality = 0;
}
