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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Additional permissions under GNU GPL version 3 section 7
If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
// //
// plOGGCodec - Plasma codec support for the OGG/Vorbis file format. //
// //
//// Notes ///////////////////////////////////////////////////////////////////
// //
// 2.7.2003 - Created by mcn. If only life were really this simple... //
// //
//////////////////////////////////////////////////////////////////////////////
#include <math.h>
#include <vorbis/codec.h>
#include <vorbis/vorbisfile.h>
#include "HeadSpin.h"
#include "plOGGCodec.h"
#include "hsTimer.h"
#include "pnNetCommon/plNetApp.h"
plOGGCodec::DecodeFormat plOGGCodec::fDecodeFormat = plOGGCodec::k16bitSigned;
uint8_t plOGGCodec::fDecodeFlags = 0;
//// Constructor/Destructor //////////////////////////////////////////////////
plOGGCodec::plOGGCodec( const plFileName &path, plAudioCore::ChannelSelect whichChan ) : fFileHandle( nil )
{
fOggFile = nil;
IOpen( path, whichChan );
fCurHeaderPos = 0;
fHeadBuf = nil;
}
void plOGGCodec::BuildActualWaveHeader()
{
// Build an actual WAVE header for this ogg
int fmtSize = 16;
short fmt = 1;
int factsize = 4;
int factdata = 0;
int size = fDataSize+48; // size of data with header except for first four bytes
fHeadBuf = (uint8_t *)malloc(56);
memcpy(fHeadBuf, "RIFF", 4);
memcpy(fHeadBuf+4, &size, 4);
memcpy(fHeadBuf+8, "WAVE", 4);
memcpy(fHeadBuf+12, "fmt ", 4);
memcpy(fHeadBuf+16, &fmtSize, 4);
memcpy(fHeadBuf+20, &fmt, 2); /* format */
memcpy(fHeadBuf+22, &fHeader.fNumChannels, 2);
memcpy(fHeadBuf+24, &fHeader.fNumSamplesPerSec, 4);
memcpy(fHeadBuf+28, &fHeader.fAvgBytesPerSec, 4);
memcpy(fHeadBuf+32, &fHeader.fBlockAlign, 4);
memcpy(fHeadBuf+34, &fHeader.fBitsPerSample, 2);
memcpy(fHeadBuf+36, "fact", 4);
memcpy(fHeadBuf+40, &factsize, 4);
memcpy(fHeadBuf+44, &factdata, 4);
memcpy(fHeadBuf+48, "data", 4);
memcpy(fHeadBuf+52, &fDataSize, 4);
}
bool plOGGCodec::ReadFromHeader(int numBytes, void *data)
{
if(fCurHeaderPos < 56)
{
memcpy(data, fHeadBuf+fCurHeaderPos, numBytes);
fCurHeaderPos += numBytes;
return true;
}
return false;
}
void plOGGCodec::IOpen( const plFileName &path, plAudioCore::ChannelSelect whichChan )
{
hsAssert( path.IsValid(), "Invalid path specified in plOGGCodec reader" );
// plNetClientApp::StaticDebugMsg("Ogg Open %s, t=%f, start", path, hsTimer::GetSeconds());
fFilename = path;
fWhichChannel = whichChan;
/// Open the file as a plain binary stream
fFileHandle = plFileSystem::Open(path, "rb");
if( fFileHandle != nil )
{
/// Create the OGG data struct
fOggFile = new OggVorbis_File;
/// Open the OGG decompressor
if( ov_open( fFileHandle, fOggFile, NULL, 0 ) < 0 )
{
IError( "Unable to open OGG source file" );
return;
}
/// Construct some header info from the ogg info
vorbis_info *vInfo = ov_info( fOggFile, -1 );
fHeader.fFormatTag = 1;
fHeader.fNumChannels = vInfo->channels;
fHeader.fNumSamplesPerSec = vInfo->rate;
// Funny thing about the bits per sample: we get to CHOOSE. Go figure!
fHeader.fBitsPerSample = ( fDecodeFormat == k8bitUnsigned ) ? 8 : 16;
// Why WAV files hold this info when it can be calculated is beyond me...
fHeader.fBlockAlign = ( fHeader.fBitsPerSample * fHeader.fNumChannels ) >> 3;
fHeader.fAvgBytesPerSec = fHeader.fNumSamplesPerSec * fHeader.fBlockAlign;
/// The size in bytes of our PCM data stream
/// Note: OGG sometimes seems to be off by 1 sample, which causes our reads to suck
/// because we end up waiting for 1 more sample than we actually have. So, on the
/// assumption that OGG is just slightly wrong sometimes, we just subtract 1 sample
/// from what it tells us. As Brice put it, who's going to miss 1/40,000'ths of a second?
fDataSize = (uint32_t)(( ov_pcm_total( fOggFile, -1 ) - 1 ) * fHeader.fBlockAlign);
/// Channel select
if( fWhichChannel != plAudioCore::kAll )
{
fChannelAdjust = 2;
fChannelOffset = ( fWhichChannel == plAudioCore::kLeft ) ? 0 : 1;
}
else
{
fChannelAdjust = 1;
fChannelOffset = 0;
}
/// Construct our fake header for channel adjustment
fFakeHeader = fHeader;
fFakeHeader.fAvgBytesPerSec /= fChannelAdjust;
fFakeHeader.fNumChannels /= (uint16_t)fChannelAdjust;
fFakeHeader.fBlockAlign /= (uint16_t)fChannelAdjust;
SetPosition( 0 );
}
// plNetClientApp::StaticDebugMsg("Ogg Open %s, t=%f, end", path, hsTimer::GetSeconds());
}
plOGGCodec::~plOGGCodec()
{
Close();
}
void plOGGCodec::Close( void )
{
// plNetClientApp::StaticDebugMsg("Ogg Close, t=%f, start", hsTimer::GetSeconds());
free(fHeadBuf);
fHeadBuf = nil;
if( fOggFile != nil )
{
ov_clear( fOggFile );
delete fOggFile;
fOggFile = nil;
}
if( fFileHandle != nil )
{
fclose( fFileHandle );
fFileHandle = nil;
}
// plNetClientApp::StaticDebugMsg("Ogg Close, t=%f, end", hsTimer::GetSeconds());
}
void plOGGCodec::IError( const char *msg )
{
hsAssert( false, msg );
Close();
}
plWAVHeader &plOGGCodec::GetHeader( void )
{
hsAssert( IsValid(), "GetHeader() called on an invalid OGG file" );
return fFakeHeader;
}
float plOGGCodec::GetLengthInSecs( void )
{
hsAssert( IsValid(), "GetLengthInSecs() called on an invalid OGG file" );
// Just query ogg directly...starting to see how cool ogg is yet?
return (float)ov_time_total( fOggFile, -1 );
}
bool plOGGCodec::SetPosition( uint32_t numBytes )
{
hsAssert( IsValid(), "GetHeader() called on an invalid OGG file" );
if( !ov_seekable( fOggFile ) )
{
hsAssert( false, "Trying to set position on an unseekable OGG stream!" );
return false;
}
// The numBytes position is in uncompressed space and should be sample-aligned anyway,
// so this should be just fine here.
ogg_int64_t newSample = ( numBytes / (fFakeHeader.fBlockAlign * fChannelAdjust) );
// Now please note how freaking easy it is here to do accurate or fast seeking...
// Also note that if we're doing our channel extraction, we MUST do it the accurate way
if( ( fDecodeFlags & kFastSeeking ) && fChannelAdjust == 1 )
{
if( ov_pcm_seek_page( fOggFile, newSample ) != 0 )
{
IError( "Unable to seek OGG stream" );
return false;
}
}
else
{
if( ov_pcm_seek( fOggFile, newSample ) != 0 )
{
IError( "Unable to seek OGG stream" );
return false;
}
}
return true;
}
bool plOGGCodec::Read( uint32_t numBytes, void *buffer )
{
hsAssert( IsValid(), "GetHeader() called on an invalid OGG file" );
// plNetClientApp::StaticDebugMsg("Ogg Read, t=%f, start", hsTimer::GetSeconds());
int bytesPerSample = ( fDecodeFormat == k16bitSigned ) ? 2 : 1;
int isSigned = ( fDecodeFormat == k16bitSigned ) ? 1 : 0;
int currSection;
if( fWhichChannel == plAudioCore::kAll )
{
// Easy, just a straight read
char *uBuffer = (char *)buffer;
while( numBytes > 0 )
{
// Supposedly we should pay attention to currSection in case of bitrate changes,
// but hopefully we'll never have those....
long bytesRead = ov_read( fOggFile, uBuffer, numBytes, 0, bytesPerSample, isSigned, &currSection );
// Since our job is so simple, do some extra error checking
if( bytesRead == OV_HOLE )
{
IError( "Unable to read from OGG file: missing data" );
return false;
}
else if( bytesRead == OV_EBADLINK )
{
IError( "Unable to read from OGG file: corrupt link" );
return false;
}
else if( bytesRead == 0 )
{
IError( "Unable to finish reading from OGG file: end of stream" );
return false;
}
else if( bytesRead < 0 )
{
IError( "Unable to read from OGG file: unknown error" );
return false;
}
numBytes -= bytesRead;
uBuffer += bytesRead;
}
}
else
{
/// Read in 4k chunks and extract
static char trashBuffer[ 4096 ];
long toRead, i, thisRead, sampleSize = fFakeHeader.fBlockAlign;
for( ; numBytes > 0; )
{
/// Read 4k worth of samples
toRead = ( sizeof( trashBuffer ) < numBytes * fChannelAdjust ) ? sizeof( trashBuffer ) : numBytes * fChannelAdjust;
thisRead = ov_read( fOggFile, (char *)trashBuffer, toRead, 0, bytesPerSample, isSigned, &currSection );
if( thisRead < 0 )
return false;
/// Copy every other sample out
int sampleOffset = (fChannelOffset == 1) ? sampleSize : 0;
for (i = 0; i < thisRead; i += sampleSize * 2)
{
memcpy(buffer, &trashBuffer[i + sampleOffset], sampleSize);
buffer = (void*)((uint8_t*)buffer + sampleSize);
numBytes -= sampleSize;
}
}
}
// plNetClientApp::StaticDebugMsg("Ogg Read, t=%f, end", hsTimer::GetSeconds());
return true;
}
uint32_t plOGGCodec::NumBytesLeft( void )
{
if(!IsValid())
{
hsAssert( false, "GetHeader() called on an invalid OGG file" );
return 0;
}
return (uint32_t)(( fDataSize - ( ov_pcm_tell( fOggFile ) * fHeader.fBlockAlign ) ) / fChannelAdjust);
}