www.pudn.com > WMACompressor.zip > Lame.cs
//
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
// PURPOSE. IT CAN BE DISTRIBUTED FREE OF CHARGE AS LONG AS THIS HEADER
// REMAINS UNCHANGED.
//
// Email: yetiicb@hotmail.com
//
// Copyright (C) 2002-2003 Idael Cardoso.
//
// LAME ( LAME Ain't an Mp3 Encoder )
// You must call the fucntion "beVersion" to obtain information like version
// numbers (both of the DLL and encoding engine), release date and URL for
// lame_enc's homepage. All this information should be made available to the
// user of your product through a dialog box or something similar.
// You must see all information about LAME project and legal license infos at
// http://www.mp3dev.org/ The official LAME site
//
using System;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using WaveLib;
namespace Yeti.Lame
{
public enum VBRMETHOD : int
{
VBR_METHOD_NONE = -1,
VBR_METHOD_DEFAULT = 0,
VBR_METHOD_OLD = 1,
VBR_METHOD_NEW = 2,
VBR_METHOD_MTRH = 3,
VBR_METHOD_ABR = 4
}
/* MPEG modes */
public enum MpegMode : uint
{
STEREO = 0,
JOINT_STEREO,
DUAL_CHANNEL, /* LAME doesn't supports this! */
MONO,
NOT_SET,
MAX_INDICATOR /* Don't use this! It's used for sanity checks. */
}
public enum LAME_QUALITY_PRESET : int
{
LQP_NOPRESET =-1,
// QUALITY PRESETS
LQP_NORMAL_QUALITY = 0,
LQP_LOW_QUALITY = 1,
LQP_HIGH_QUALITY = 2,
LQP_VOICE_QUALITY = 3,
LQP_R3MIX = 4,
LQP_VERYHIGH_QUALITY = 5,
LQP_STANDARD = 6,
LQP_FAST_STANDARD = 7,
LQP_EXTREME = 8,
LQP_FAST_EXTREME = 9,
LQP_INSANE = 10,
LQP_ABR = 11,
LQP_CBR = 12,
LQP_MEDIUM = 13,
LQP_FAST_MEDIUM = 14,
// NEW PRESET VALUES
LQP_PHONE =1000,
LQP_SW =2000,
LQP_AM =3000,
LQP_FM =4000,
LQP_VOICE =5000,
LQP_RADIO =6000,
LQP_TAPE =7000,
LQP_HIFI =8000,
LQP_CD =9000,
LQP_STUDIO =10000
}
[StructLayout(LayoutKind.Sequential), Serializable]
public struct MP3 //BE_CONFIG_MP3
{
public uint dwSampleRate; // 48000, 44100 and 32000 allowed
public byte byMode; // BE_MP3_MODE_STEREO, BE_MP3_MODE_DUALCHANNEL, BE_MP3_MODE_MONO
public ushort wBitrate; // 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256 and 320 allowed
public int bPrivate;
public int bCRC;
public int bCopyright;
public int bOriginal;
}
[StructLayout(LayoutKind.Sequential, Size=327), Serializable]
public struct LHV1 // BE_CONFIG_LAME LAME header version 1
{
public const uint MPEG1 = 1;
public const uint MPEG2 = 0;
// STRUCTURE INFORMATION
public uint dwStructVersion;
public uint dwStructSize;
// BASIC ENCODER SETTINGS
public uint dwSampleRate; // SAMPLERATE OF INPUT FILE
public uint dwReSampleRate; // DOWNSAMPLERATE, 0=ENCODER DECIDES
public MpegMode nMode; // STEREO, MONO
public uint dwBitrate; // CBR bitrate, VBR min bitrate
public uint dwMaxBitrate; // CBR ignored, VBR Max bitrate
public LAME_QUALITY_PRESET nPreset; // Quality preset
public uint dwMpegVersion; // MPEG-1 OR MPEG-2
public uint dwPsyModel; // FUTURE USE, SET TO 0
public uint dwEmphasis; // FUTURE USE, SET TO 0
// BIT STREAM SETTINGS
public int bPrivate; // Set Private Bit (TRUE/FALSE)
public int bCRC; // Insert CRC (TRUE/FALSE)
public int bCopyright; // Set Copyright Bit (TRUE/FALSE)
public int bOriginal; // Set Original Bit (TRUE/FALSE)
// VBR STUFF
public int bWriteVBRHeader; // WRITE XING VBR HEADER (TRUE/FALSE)
public int bEnableVBR; // USE VBR ENCODING (TRUE/FALSE)
public int nVBRQuality; // VBR QUALITY 0..9
public uint dwVbrAbr_bps; // Use ABR in stead of nVBRQuality
public VBRMETHOD nVbrMethod;
public int bNoRes; // Disable Bit resorvoir (TRUE/FALSE)
// MISC SETTINGS
public int bStrictIso; // Use strict ISO encoding rules (TRUE/FALSE)
public ushort nQuality; // Quality Setting, HIGH BYTE should be NOT LOW byte, otherwhise quality=5
// FUTURE USE, SET TO 0, align strucutre to 331 bytes
//[ MarshalAs( UnmanagedType.ByValArray, SizeConst=255-4*4-2 )]
//public byte[] btReserved;//[255-4*sizeof(DWORD) - sizeof( WORD )];
public LHV1(WaveFormat format, uint MpeBitRate)
{
if ( format.wFormatTag != (short)WaveFormats.Pcm )
{
throw new ArgumentOutOfRangeException("format", "Only PCM format supported");
}
if ( format.wBitsPerSample != 16)
{
throw new ArgumentOutOfRangeException("format", "Only 16 bits samples supported");
}
dwStructVersion = 1;
dwStructSize = (uint)Marshal.SizeOf(typeof(BE_CONFIG));
switch (format.nSamplesPerSec)
{
case 16000 :
case 22050 :
case 24000 :
dwMpegVersion = MPEG2;
break;
case 32000 :
case 44100 :
case 48000 :
dwMpegVersion = MPEG1;
break;
default :
throw new ArgumentOutOfRangeException("format", "Unsupported sample rate");
}
dwSampleRate = (uint)format.nSamplesPerSec; // INPUT FREQUENCY
dwReSampleRate = 0; // DON'T RESAMPLE
switch (format.nChannels)
{
case 1 :
nMode = MpegMode.MONO;
break;
case 2 :
nMode = MpegMode.STEREO;
break;
default:
throw new ArgumentOutOfRangeException("format", "Invalid number of channels");
}
switch (MpeBitRate)
{
case 32 :
case 40 :
case 48 :
case 56 :
case 64 :
case 80 :
case 96 :
case 112 :
case 128 :
case 160 : //Allowed bit rates in MPEG1 and MPEG2
break;
case 192 :
case 224 :
case 256 :
case 320 : //Allowed only in MPEG1
if (dwMpegVersion != MPEG1)
{
throw new ArgumentOutOfRangeException("MpsBitRate", "Bit rate not compatible with input format");
}
break;
case 8 :
case 16 :
case 24 :
case 144 : //Allowed only in MPEG2
if (dwMpegVersion != MPEG2)
{
throw new ArgumentOutOfRangeException("MpsBitRate", "Bit rate not compatible with input format");
}
break;
default :
throw new ArgumentOutOfRangeException("MpsBitRate", "Unsupported bit rate");
}
dwBitrate = MpeBitRate; // MINIMUM BIT RATE
nPreset = LAME_QUALITY_PRESET.LQP_NORMAL_QUALITY; // QUALITY PRESET SETTING
dwPsyModel = 0; // USE DEFAULT PSYCHOACOUSTIC MODEL
dwEmphasis = 0; // NO EMPHASIS TURNED ON
bOriginal = 1; // SET ORIGINAL FLAG
bWriteVBRHeader = 0;
bNoRes = 0; // No Bit resorvoir
bCopyright = 0;
bCRC = 0;
bEnableVBR = 0;
bPrivate = 0;
bStrictIso = 0;
dwMaxBitrate = 0;
dwVbrAbr_bps = 0;
nQuality = 0;
nVbrMethod = VBRMETHOD.VBR_METHOD_NONE;
nVBRQuality = 0;
}
}
[StructLayout(LayoutKind.Sequential), Serializable]
public struct ACC
{
public uint dwSampleRate;
public byte byMode;
public ushort wBitrate;
public byte byEncodingMethod;
}
[StructLayout(LayoutKind.Explicit), Serializable]
public class Format
{
[FieldOffset(0)]
public MP3 mp3;
[FieldOffset(0)]
public LHV1 lhv1;
[FieldOffset(0)]
public ACC acc;
public Format(WaveFormat format, uint MpeBitRate)
{
lhv1 = new LHV1(format, MpeBitRate);
}
}
[StructLayout(LayoutKind.Sequential), Serializable]
public class BE_CONFIG
{
// encoding formats
public const uint BE_CONFIG_MP3 = 0;
public const uint BE_CONFIG_LAME = 256;
public uint dwConfig;
public Format format;
public BE_CONFIG(WaveFormat format, uint MpeBitRate)
{
this.dwConfig = BE_CONFIG_LAME;
this.format = new Format(format, MpeBitRate);
}
public BE_CONFIG(WaveFormat format)
: this(format, 128)
{
}
}
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
public class BE_VERSION
{
public const uint BE_MAX_HOMEPAGE = 256;
public byte byDLLMajorVersion;
public byte byDLLMinorVersion;
public byte byMajorVersion;
public byte byMinorVersion;
// DLL Release date
public byte byDay;
public byte byMonth;
public ushort wYear;
//Homepage URL
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=257/*BE_MAX_HOMEPAGE+1*/)]
public string zHomepage;
public byte byAlphaLevel;
public byte byBetaLevel;
public byte byMMXEnabled;
[MarshalAs(UnmanagedType.ByValArray, SizeConst=125)]
public byte[] btReserved;
public BE_VERSION()
{
btReserved = new byte[125];
}
}
///
/// Lame_enc DLL functions
///
public class Lame_encDll
{
//Error codes
public const uint BE_ERR_SUCCESSFUL = 0;
public const uint BE_ERR_INVALID_FORMAT = 1;
public const uint BE_ERR_INVALID_FORMAT_PARAMETERS = 2;
public const uint BE_ERR_NO_MORE_HANDLES = 3;
public const uint BE_ERR_INVALID_HANDLE = 4;
///
/// This function is the first to call before starting an encoding stream.
///
/// Encoder settings
/// Receives the number of samples (not bytes, each sample is a SHORT) to send to each beEncodeChunk() on return.
/// Receives the minimun number of bytes that must have the output(result) buffer
/// Receives the stream handle on return
/// On success: BE_ERR_SUCCESSFUL
[DllImport("Lame_enc.dll")]
public static extern uint beInitStream(BE_CONFIG pbeConfig, ref uint dwSamples, ref uint dwBufferSize, ref uint phbeStream);
///
/// Encodes a chunk of samples. Please note that if you have set the output to
/// generate mono MP3 files you must feed beEncodeChunk() with mono samples
///
/// Handle of the stream.
/// Number of samples to be encoded for this call.
/// This should be identical to what is returned by beInitStream(),
/// unless you are encoding the last chunk, which might be smaller.
/// Array of 16-bit signed samples to be encoded.
/// These should be in stereo when encoding a stereo MP3
/// and mono when encoding a mono MP3
/// Buffer where to write the encoded data.
/// This buffer should be at least of the minimum size returned by beInitStream().
/// Returns the number of bytes of encoded data written.
/// The amount of data written might vary from chunk to chunk
/// On success: BE_ERR_SUCCESSFUL
[DllImport("Lame_enc.dll")]
public static extern uint beEncodeChunk(uint hbeStream, uint nSamples, short[] pInSamples, [In, Out] byte[] pOutput, ref uint pdwOutput);
///
/// Encodes a chunk of samples. Please note that if you have set the output to
/// generate mono MP3 files you must feed beEncodeChunk() with mono samples
///
/// Handle of the stream.
/// Number of samples to be encoded for this call.
/// This should be identical to what is returned by beInitStream(),
/// unless you are encoding the last chunk, which might be smaller.
/// Pointer at the 16-bit signed samples to be encoded.
/// InPtr is used to pass any type of array without need of make memory copy,
/// then gaining in performance. Note that nSamples is not the number of bytes,
/// but samples (is sample is a SHORT)
/// Buffer where to write the encoded data.
/// This buffer should be at least of the minimum size returned by beInitStream().
/// Returns the number of bytes of encoded data written.
/// The amount of data written might vary from chunk to chunk
/// On success: BE_ERR_SUCCESSFUL
[DllImport("Lame_enc.dll")]
protected static extern uint beEncodeChunk(uint hbeStream, uint nSamples, IntPtr pSamples, [In, Out] byte[] pOutput, ref uint pdwOutput);
///
/// Encodes a chunk of samples. Samples are contained in a byte array
///
/// Handle of the stream.
/// Bytes to encode
/// Position of the first byte to encode
/// Number of bytes to encode (not samples, samples are two byte lenght)
/// Buffer where to write the encoded data.
/// This buffer should be at least of the minimum size returned by beInitStream().
/// Returns the number of bytes of encoded data written.
/// The amount of data written might vary from chunk to chunk
/// On success: BE_ERR_SUCCESSFUL
public static uint EncodeChunk(uint hbeStream, byte[] buffer, int index, uint nBytes, byte[] pOutput, ref uint pdwOutput)
{
uint res;
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
try
{
IntPtr ptr = (IntPtr)(handle.AddrOfPinnedObject().ToInt32()+index);
res = beEncodeChunk(hbeStream, nBytes/2/*Samples*/, ptr, pOutput, ref pdwOutput);
}
finally
{
handle.Free();
}
return res;
}
///
/// Encodes a chunk of samples. Samples are contained in a byte array
///
/// Handle of the stream.
/// Bytes to encode
/// Buffer where to write the encoded data.
/// This buffer should be at least of the minimum size returned by beInitStream().
/// Returns the number of bytes of encoded data written.
/// The amount of data written might vary from chunk to chunk
/// On success: BE_ERR_SUCCESSFUL
public static uint EncodeChunk(uint hbeStream, byte[] buffer, byte[] pOutput, ref uint pdwOutput)
{
return EncodeChunk(hbeStream, buffer, 0, (uint)buffer.Length, pOutput, ref pdwOutput);
}
///
/// This function should be called after encoding the last chunk in order to flush
/// the encoder. It writes any encoded data that still might be left inside the
/// encoder to the output buffer. This function should NOT be called unless
/// you have encoded all of the chunks in your stream.
///
/// Handle of the stream.
/// Where to write the encoded data. This buffer should be
/// at least of the minimum size returned by beInitStream().
/// Returns number of bytes of encoded data written.
/// On success: BE_ERR_SUCCESSFUL
[DllImport("Lame_enc.dll")]
public static extern uint beDeinitStream(uint hbeStream, [In, Out] byte[] pOutput, ref uint pdwOutput);
///
/// Last function to be called when finished encoding a stream.
/// Should unlike beDeinitStream() also be called if the encoding is canceled.
///
/// Handle of the stream.
/// On success: BE_ERR_SUCCESSFUL
[DllImport("Lame_enc.dll")]
public static extern uint beCloseStream(uint hbeStream);
///
/// Returns information like version numbers (both of the DLL and encoding engine),
/// release date and URL for lame_enc's homepage.
/// All this information should be made available to the user of your product
/// through a dialog box or something similar.
///
///
[DllImport("Lame_enc.dll")]
public static extern void beVersion([Out] BE_VERSION pbeVersion);
[DllImport("Lame_enc.dll", CharSet=CharSet.Ansi)]
public static extern void beWriteVBRHeader(string pszMP3FileName);
[DllImport("Lame_enc.dll")]
public static extern uint beEncodeChunkFloatS16NI(uint hbeStream, uint nSamples, [In]float[] buffer_l, [In]float[] buffer_r, [In, Out]byte[] pOutput, ref uint pdwOutput);
[DllImport("Lame_enc.dll")]
public static extern uint beFlushNoGap(uint hbeStream, [In, Out]byte[] pOutput, ref uint pdwOutput);
[DllImport("Lame_enc.dll", CharSet=CharSet.Ansi)]
public static extern uint beWriteInfoTag(uint hbeStream, string lpszFileName);
}
}