// 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; }