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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/>.
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==*/
//////////////////////////////////////////////////////////////////////////////
// //
// plBufferedFileReader - Reads in a given file into a RAM buffer, then //
// "reads" from that buffer as requested. Useless //
// for normal sounds, but perfect for streaming //
// from RAM. //
// //
//// Notes ///////////////////////////////////////////////////////////////////
// //
// 11.1.2002 - Created by mcn. //
// //
//////////////////////////////////////////////////////////////////////////////
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "hsTypes.h"
#include "plBufferedFileReader.h"
//#include "plProfile.h"
//plProfile_CreateMemCounter( "BufferedRAM", "Sound", SndBufferedMem );
//// Constructor/Destructor //////////////////////////////////////////////////
plBufferedFileReader::plBufferedFileReader( const char *path, plAudioCore::ChannelSelect whichChan )
{
// Init some stuff
fBufferSize = 0;
fBuffer = nil;
fCursor = 0;
hsAssert( path != nil, "Invalid path specified in plBufferedFileReader" );
// Ask plAudioFileReader for another reader to get this file
// Note: have this reader do the chanSelect for us
plAudioFileReader *reader = plAudioFileReader::CreateReader( path, whichChan );
if( reader == nil || !reader->IsValid() )
{
delete reader;
IError( "Unable to open file to read in to RAM buffer" );
return;
}
fHeader = reader->GetHeader();
fBufferSize = reader->GetDataSize();
fBuffer = TRACKED_NEW UInt8[ fBufferSize ];
//plProfile_NewMem( SndBufferedMem, fBufferSize );
if( fBuffer == nil )
{
delete reader;
IError( "Unable to allocate RAM buffer" );
return;
}
if( !reader->Read( fBufferSize, fBuffer ) )
{
delete reader;
IError( "Unable to read file into RAM buffer" );
return;
}
// All done!
delete reader;
}
plBufferedFileReader::~plBufferedFileReader()
{
Close();
}
void plBufferedFileReader::Close( void )
{
//plProfile_DelMem( SndBufferedMem, fBufferSize );
DEL(fBuffer);;
fBuffer = nil;
fBufferSize = 0;
fCursor = 0;
}
void plBufferedFileReader::IError( const char *msg )
{
hsAssert( false, msg );
Close();
}
plWAVHeader &plBufferedFileReader::GetHeader( void )
{
hsAssert( IsValid(), "GetHeader() called on an invalid RAM buffer" );
return fHeader;
}
float plBufferedFileReader::GetLengthInSecs( void )
{
hsAssert( IsValid(), "GetLengthInSecs() called on an invalid RAM buffer" );
return (float)fBufferSize / (float)fHeader.fAvgBytesPerSec;
}
hsBool plBufferedFileReader::SetPosition( UInt32 numBytes )
{
hsAssert( IsValid(), "SetPosition() called on an invalid RAM buffer" );
if( numBytes > fBufferSize )
{
hsAssert( false, "Invalid position in SetPosition()" );
return false;
}
fCursor = numBytes;
return true;
}
hsBool plBufferedFileReader::Read( UInt32 numBytes, void *buffer )
{
hsAssert( IsValid(), "Read() called on an invalid RAM buffer" );
hsBool valid = true;
if( fCursor + numBytes > fBufferSize )
{
numBytes = fBufferSize - fCursor;
valid = false;
}
memcpy( buffer, fBuffer + fCursor, numBytes );
fCursor += numBytes;
return valid;
}
UInt32 plBufferedFileReader::NumBytesLeft( void )
{
hsAssert( IsValid(), "NumBytesLeft() called on an invalid RAM buffer" );
return fBufferSize - fCursor;
}