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342 lines
11 KiB
342 lines
11 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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////////////////////////////////////////////////////////////////////////////// |
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// // |
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// plOGGCodec - Plasma codec support for the OGG/Vorbis file format. // |
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// // |
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//// Notes /////////////////////////////////////////////////////////////////// |
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// // |
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// 2.7.2003 - Created by mcn. If only life were really this simple... // |
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// // |
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////////////////////////////////////////////////////////////////////////////// |
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#include <cstdlib> |
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#include <cstdio> |
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#include <cstring> |
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#include <math.h> |
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#include <vorbis/codec.h> |
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#include <vorbis/vorbisfile.h> |
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#include "hsTypes.h" |
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#include "plOGGCodec.h" |
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#include "hsTimer.h" |
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#include "pnNetCommon/plNetApp.h" |
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plOGGCodec::DecodeFormat plOGGCodec::fDecodeFormat = plOGGCodec::k16bitSigned; |
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UInt8 plOGGCodec::fDecodeFlags = 0; |
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//// Constructor/Destructor ////////////////////////////////////////////////// |
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plOGGCodec::plOGGCodec( const char *path, plAudioCore::ChannelSelect whichChan ) : fFileHandle( nil ) |
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{ |
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fOggFile = nil; |
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IOpen( path, whichChan ); |
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fCurHeaderPos = 0; |
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fHeadBuf = nil; |
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} |
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void plOGGCodec::BuildActualWaveHeader() |
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{ |
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// Build an actual WAVE header for this ogg |
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int fmtSize = 16; |
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short fmt = 1; |
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int factsize = 4; |
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int factdata = 0; |
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int size = fDataSize+48; // size of data with header except for first four bytes |
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fHeadBuf = (UInt8 *) ALLOC(56); |
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memcpy(fHeadBuf, "RIFF", 4); |
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memcpy(fHeadBuf+4, &size, 4); |
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memcpy(fHeadBuf+8, "WAVE", 4); |
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memcpy(fHeadBuf+12, "fmt ", 4); |
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memcpy(fHeadBuf+16, &fmtSize, 4); |
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memcpy(fHeadBuf+20, &fmt, 2); /* format */ |
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memcpy(fHeadBuf+22, &fHeader.fNumChannels, 2); |
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memcpy(fHeadBuf+24, &fHeader.fNumSamplesPerSec, 4); |
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memcpy(fHeadBuf+28, &fHeader.fAvgBytesPerSec, 4); |
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memcpy(fHeadBuf+32, &fHeader.fBlockAlign, 4); |
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memcpy(fHeadBuf+34, &fHeader.fBitsPerSample, 2); |
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memcpy(fHeadBuf+36, "fact", 4); |
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memcpy(fHeadBuf+40, &factsize, 4); |
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memcpy(fHeadBuf+44, &factdata, 4); |
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memcpy(fHeadBuf+48, "data", 4); |
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memcpy(fHeadBuf+52, &fDataSize, 4); |
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} |
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bool plOGGCodec::ReadFromHeader(int numBytes, void *data) |
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{ |
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if(fCurHeaderPos < 56) |
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{ |
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memcpy(data, fHeadBuf+fCurHeaderPos, numBytes); |
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fCurHeaderPos += numBytes; |
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return true; |
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} |
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return false; |
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} |
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void plOGGCodec::IOpen( const char *path, plAudioCore::ChannelSelect whichChan ) |
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{ |
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hsAssert( path != nil, "Invalid path specified in plOGGCodec reader" ); |
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// plNetClientApp::StaticDebugMsg("Ogg Open %s, t=%f, start", path, hsTimer::GetSeconds()); |
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strncpy( fFilename, path, sizeof( fFilename ) ); |
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fWhichChannel = whichChan; |
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/// Open the file as a plain binary stream |
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fFileHandle = fopen( path, "rb" ); |
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if( fFileHandle != nil ) |
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{ |
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/// Create the OGG data struct |
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fOggFile = TRACKED_NEW OggVorbis_File; |
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/// Open the OGG decompressor |
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if( ov_open( fFileHandle, fOggFile, NULL, 0 ) < 0 ) |
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{ |
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IError( "Unable to open OGG source file" ); |
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return; |
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} |
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/// Construct some header info from the ogg info |
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vorbis_info *vInfo = ov_info( fOggFile, -1 ); |
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fHeader.fFormatTag = 1; |
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fHeader.fNumChannels = vInfo->channels; |
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fHeader.fNumSamplesPerSec = vInfo->rate; |
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// Funny thing about the bits per sample: we get to CHOOSE. Go figure! |
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fHeader.fBitsPerSample = ( fDecodeFormat == k8bitUnsigned ) ? 8 : 16; |
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// Why WAV files hold this info when it can be calculated is beyond me... |
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fHeader.fBlockAlign = ( fHeader.fBitsPerSample * fHeader.fNumChannels ) >> 3; |
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fHeader.fAvgBytesPerSec = fHeader.fNumSamplesPerSec * fHeader.fBlockAlign; |
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/// The size in bytes of our PCM data stream |
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/// Note: OGG sometimes seems to be off by 1 sample, which causes our reads to suck |
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/// because we end up waiting for 1 more sample than we actually have. So, on the |
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/// assumption that OGG is just slightly wrong sometimes, we just subtract 1 sample |
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/// from what it tells us. As Brice put it, who's going to miss 1/40,000'ths of a second? |
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fDataSize = (UInt32)(( ov_pcm_total( fOggFile, -1 ) - 1 ) * fHeader.fBlockAlign); |
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/// Channel select |
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if( fWhichChannel != plAudioCore::kAll ) |
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{ |
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fChannelAdjust = 2; |
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fChannelOffset = ( fWhichChannel == plAudioCore::kLeft ) ? 0 : 1; |
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} |
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else |
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{ |
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fChannelAdjust = 1; |
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fChannelOffset = 0; |
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} |
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/// Construct our fake header for channel adjustment |
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fFakeHeader = fHeader; |
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fFakeHeader.fAvgBytesPerSec /= fChannelAdjust; |
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fFakeHeader.fNumChannels /= (UInt16)fChannelAdjust; |
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fFakeHeader.fBlockAlign /= (UInt16)fChannelAdjust; |
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SetPosition( 0 ); |
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} |
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// plNetClientApp::StaticDebugMsg("Ogg Open %s, t=%f, end", path, hsTimer::GetSeconds()); |
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} |
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plOGGCodec::~plOGGCodec() |
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{ |
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Close(); |
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} |
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void plOGGCodec::Close( void ) |
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{ |
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// plNetClientApp::StaticDebugMsg("Ogg Close, t=%f, start", hsTimer::GetSeconds()); |
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FREE(fHeadBuf); |
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fHeadBuf = nil; |
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if( fOggFile != nil ) |
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{ |
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ov_clear( fOggFile ); |
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DEL(fOggFile); |
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fOggFile = nil; |
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} |
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if( fFileHandle != nil ) |
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{ |
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fclose( fFileHandle ); |
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fFileHandle = nil; |
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} |
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// plNetClientApp::StaticDebugMsg("Ogg Close, t=%f, end", hsTimer::GetSeconds()); |
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} |
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void plOGGCodec::IError( const char *msg ) |
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{ |
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hsAssert( false, msg ); |
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Close(); |
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} |
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plWAVHeader &plOGGCodec::GetHeader( void ) |
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{ |
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hsAssert( IsValid(), "GetHeader() called on an invalid OGG file" ); |
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return fFakeHeader; |
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} |
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float plOGGCodec::GetLengthInSecs( void ) |
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{ |
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hsAssert( IsValid(), "GetLengthInSecs() called on an invalid OGG file" ); |
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// Just query ogg directly...starting to see how cool ogg is yet? |
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return (float)ov_time_total( fOggFile, -1 ); |
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} |
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hsBool plOGGCodec::SetPosition( UInt32 numBytes ) |
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{ |
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hsAssert( IsValid(), "GetHeader() called on an invalid OGG file" ); |
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if( !ov_seekable( fOggFile ) ) |
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{ |
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hsAssert( false, "Trying to set position on an unseekable OGG stream!" ); |
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return false; |
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} |
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// The numBytes position is in uncompressed space and should be sample-aligned anyway, |
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// so this should be just fine here. |
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ogg_int64_t newSample = ( numBytes / (fFakeHeader.fBlockAlign * fChannelAdjust) ); |
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// Now please note how freaking easy it is here to do accurate or fast seeking... |
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// Also note that if we're doing our channel extraction, we MUST do it the accurate way |
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if( ( fDecodeFlags & kFastSeeking ) && fChannelAdjust == 1 ) |
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{ |
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if( ov_pcm_seek_page( fOggFile, newSample ) != 0 ) |
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{ |
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IError( "Unable to seek OGG stream" ); |
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return false; |
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} |
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} |
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else |
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{ |
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if( ov_pcm_seek( fOggFile, newSample ) != 0 ) |
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{ |
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IError( "Unable to seek OGG stream" ); |
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return false; |
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} |
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} |
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return true; |
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} |
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hsBool plOGGCodec::Read( UInt32 numBytes, void *buffer ) |
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{ |
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hsAssert( IsValid(), "GetHeader() called on an invalid OGG file" ); |
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// plNetClientApp::StaticDebugMsg("Ogg Read, t=%f, start", hsTimer::GetSeconds()); |
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int bytesPerSample = ( fDecodeFormat == k16bitSigned ) ? 2 : 1; |
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int isSigned = ( fDecodeFormat == k16bitSigned ) ? 1 : 0; |
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int currSection; |
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if( fWhichChannel == plAudioCore::kAll ) |
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{ |
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// Easy, just a straight read |
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char *uBuffer = (char *)buffer; |
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while( numBytes > 0 ) |
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{ |
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// Supposedly we should pay attention to currSection in case of bitrate changes, |
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// but hopefully we'll never have those.... |
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long bytesRead = ov_read( fOggFile, uBuffer, numBytes, 0, bytesPerSample, isSigned, &currSection ); |
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// Since our job is so simple, do some extra error checking |
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if( bytesRead == OV_HOLE ) |
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{ |
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IError( "Unable to read from OGG file: missing data" ); |
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return false; |
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} |
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else if( bytesRead == OV_EBADLINK ) |
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{ |
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IError( "Unable to read from OGG file: corrupt link" ); |
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return false; |
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} |
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else if( bytesRead == 0 ) |
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{ |
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IError( "Unable to finish reading from OGG file: end of stream" ); |
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return false; |
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} |
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else if( bytesRead < 0 ) |
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{ |
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IError( "Unable to read from OGG file: unknown error" ); |
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return false; |
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} |
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numBytes -= bytesRead; |
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uBuffer += bytesRead; |
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} |
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} |
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else |
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{ |
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/// Read in 4k chunks and extract |
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static char trashBuffer[ 4096 ]; |
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long toRead, i, thisRead, sampleSize = fFakeHeader.fBlockAlign; |
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for( ; numBytes > 0; ) |
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{ |
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/// Read 4k worth of samples |
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toRead = ( sizeof( trashBuffer ) < numBytes * fChannelAdjust ) ? sizeof( trashBuffer ) : numBytes * fChannelAdjust; |
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thisRead = ov_read( fOggFile, (char *)trashBuffer, toRead, 0, bytesPerSample, isSigned, &currSection ); |
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if( thisRead < 0 ) |
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return false; |
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/// Copy every other sample out |
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int sampleOffset = (fChannelOffset == 1) ? sampleSize : 0; |
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for (i = 0; i < thisRead; i += sampleSize * 2) |
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{ |
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memcpy(buffer, &trashBuffer[i + sampleOffset], sampleSize); |
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buffer = (void*)((UInt8*)buffer + sampleSize); |
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numBytes -= sampleSize; |
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} |
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} |
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} |
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// plNetClientApp::StaticDebugMsg("Ogg Read, t=%f, end", hsTimer::GetSeconds()); |
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return true; |
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} |
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UInt32 plOGGCodec::NumBytesLeft( void ) |
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{ |
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if(!IsValid()) |
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{ |
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hsAssert( false, "GetHeader() called on an invalid OGG file" ); |
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return 0; |
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} |
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return (UInt32)(( fDataSize - ( ov_pcm_tell( fOggFile ) * fHeader.fBlockAlign ) ) / fChannelAdjust); |
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}
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