| /** |
| * |
| * Lame ACM wrapper, encode/decode MP3 based RIFF/AVI files in MS Windows |
| * |
| * Copyright (c) 2002 Steve Lhomme <steve.lhomme at free.fr> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| /*! |
| \author Steve Lhomme |
| \version \$Id: DecodeStream.cpp,v 1.3 2002/01/25 17:51:42 robux4 Exp $ |
| */ |
| |
| #if !defined(STRICT) |
| #define STRICT |
| #endif // STRICT |
| |
| #include <assert.h> |
| #include <windows.h> |
| |
| #ifdef ENABLE_DECODING |
| |
| #include "adebug.h" |
| |
| #include "DecodeStream.h" |
| |
| // static methods |
| |
| DecodeStream * DecodeStream::Create() |
| { |
| DecodeStream * Result; |
| |
| Result = new DecodeStream; |
| |
| return Result; |
| } |
| |
| const bool DecodeStream::Erase(const DecodeStream * a_ACMStream) |
| { |
| delete a_ACMStream; |
| return true; |
| } |
| |
| // class methods |
| |
| DecodeStream::DecodeStream() : |
| m_WorkingBufferUseSize(0), |
| gfp(NULL) |
| { |
| /// \todo get the debug level from the registry |
| my_debug = new ADbg(DEBUG_LEVEL_CREATION); |
| if (my_debug != NULL) { |
| unsigned char DebugFileName[512]; |
| |
| my_debug->setPrefix("MPG123stream"); /// \todo get it from the registry |
| my_debug->setIncludeTime(true); /// \todo get it from the registry |
| |
| // Check in the registry if we have to Output Debug information |
| DebugFileName[0] = '\0'; |
| |
| HKEY OssKey; |
| if (RegOpenKeyEx( HKEY_LOCAL_MACHINE, "SOFTWARE\\MUKOLI", 0, KEY_READ , &OssKey ) == ERROR_SUCCESS) { |
| DWORD DataType; |
| DWORD DebugFileNameSize = 512; |
| if (RegQueryValueEx( OssKey, "DebugFile", NULL, &DataType, DebugFileName, &DebugFileNameSize ) == ERROR_SUCCESS) { |
| if (DataType == REG_SZ) { |
| my_debug->setUseFile(true); |
| my_debug->setDebugFile((char *)DebugFileName); |
| my_debug->OutPut("Debug file is %s",(char *)DebugFileName); |
| } |
| } |
| } |
| my_debug->OutPut(DEBUG_LEVEL_FUNC_START, "DecodeStream Creation (0X%08X)",this); |
| } |
| else { |
| ADbg debug; |
| debug.OutPut("DecodeStream::ACMACMStream : Impossible to create my_debug"); |
| } |
| |
| } |
| |
| DecodeStream::~DecodeStream() |
| { |
| // lame_close( gfp ); |
| |
| if (my_debug != NULL) |
| { |
| my_debug->OutPut(DEBUG_LEVEL_FUNC_START, "DecodeStream Deletion (0X%08X)",this); |
| delete my_debug; |
| } |
| } |
| |
| bool DecodeStream::init(const int nSamplesPerSec, const int nChannels, const int nAvgBytesPerSec, const int nSourceBitrate) |
| { |
| bool bResult = false; |
| |
| my_SamplesPerSec = nSamplesPerSec; |
| my_Channels = nChannels; |
| my_AvgBytesPerSec = nAvgBytesPerSec; |
| my_SourceBitrate = nSourceBitrate; |
| |
| bResult = true; |
| |
| return bResult; |
| } |
| |
| bool DecodeStream::open() |
| { |
| bool bResult = false; |
| |
| bResult = bool(InitMP3(&my_DecodeData) != 0); |
| |
| return bResult; |
| } |
| |
| bool DecodeStream::close(LPBYTE pOutputBuffer, DWORD *pOutputSize) |
| { |
| |
| bool bResult = false; |
| /* |
| int nOutputSamples = 0; |
| |
| nOutputSamples = lame_encode_flush( gfp, pOutputBuffer, 0 ); |
| |
| if ( nOutputSamples < 0 ) |
| { |
| // BUFFER_TOO_SMALL |
| *pOutputSize = 0; |
| } |
| else |
| { |
| *pOutputSize = nOutputSamples; |
| |
| bResult = true; |
| } |
| /* |
| // lame will be close in VbrWriteTag function |
| if ( !lame_get_bWriteVbrTag( gfp ) ) |
| { |
| // clean up of allocated memory |
| lame_close( gfp ); |
| } |
| */ |
| |
| ExitMP3(&my_DecodeData); |
| |
| bResult = true; |
| |
| return bResult; |
| } |
| |
| DWORD DecodeStream::GetOutputSizeForInput(const DWORD the_SrcLength) const |
| { |
| DWORD Result; |
| |
| double OutputInputRatio = double(my_SamplesPerSec * 2 * my_Channels) / double(my_SourceBitrate); |
| |
| OutputInputRatio *= 1.15; // allow 15% more |
| |
| Result = DWORD(double(the_SrcLength) * OutputInputRatio); |
| |
| my_debug->OutPut(DEBUG_LEVEL_FUNC_CODE, "Result = %d (OutputInputRatio = %f)",Result,OutputInputRatio); |
| |
| return Result; |
| } |
| |
| bool DecodeStream::ConvertBuffer(LPACMDRVSTREAMHEADER a_StreamHeader) |
| { |
| bool result = false; |
| |
| if (my_debug != NULL) |
| { |
| my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "enter DecodeStream::ConvertBuffer"); |
| } |
| |
| int ProcessedBytes; |
| |
| int ret = decodeMP3(&my_DecodeData, a_StreamHeader->pbSrc, a_StreamHeader->cbSrcLength, (char *)a_StreamHeader->pbDst, a_StreamHeader->cbDstLength, &ProcessedBytes); |
| |
| switch (ret) |
| { |
| case MP3_OK: |
| a_StreamHeader->cbSrcLengthUsed = a_StreamHeader->cbSrcLength; |
| a_StreamHeader->cbDstLengthUsed = ProcessedBytes; |
| result = true; |
| break; |
| case MP3_NEED_MORE: |
| a_StreamHeader->cbSrcLengthUsed = 0; |
| a_StreamHeader->cbDstLengthUsed = 0; |
| break; |
| case MP3_ERR: |
| break; |
| } |
| |
| /* |
| DWORD InSize = a_StreamHeader->cbSrcLength / 2, OutSize = a_StreamHeader->cbDstLength; // 2 for 8<->16 bits |
| |
| // Encode it |
| int dwSamples; |
| int nOutputSamples = 0; |
| |
| dwSamples = InSize / lame_get_num_channels( gfp ); |
| |
| if ( 1 == lame_get_num_channels( gfp ) ) |
| { |
| nOutputSamples = lame_encode_buffer(gfp,(PSHORT)a_StreamHeader->pbSrc,(PSHORT)a_StreamHeader->pbSrc,dwSamples,a_StreamHeader->pbDst,a_StreamHeader->cbDstLength); |
| } |
| else |
| { |
| nOutputSamples = lame_encode_buffer_interleaved(gfp,(PSHORT)a_StreamHeader->pbSrc,dwSamples,a_StreamHeader->pbDst,a_StreamHeader->cbDstLength); |
| } |
| |
| a_StreamHeader->cbSrcLengthUsed = a_StreamHeader->cbSrcLength; |
| a_StreamHeader->cbDstLengthUsed = nOutputSamples; |
| |
| result = a_StreamHeader->cbDstLengthUsed <= a_StreamHeader->cbDstLength; |
| */ |
| my_debug->OutPut(DEBUG_LEVEL_FUNC_CODE, "UsedSize = %d / EncodedSize = %d, result = %d, ret = %s", a_StreamHeader->cbSrcLengthUsed, a_StreamHeader->cbDstLengthUsed, result, |
| (ret == MP3_OK)?"MP3_OK":(ret == MP3_NEED_MORE)?"MP3_NEED_MORE":"error"); |
| |
| if (my_debug != NULL) |
| { |
| my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "DecodeStream::ConvertBuffer result = %d",result); |
| } |
| |
| return result; |
| } |
| #endif // ENABLE_DECODING |