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/*==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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Additional permissions under GNU GPL version 3 section 7
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If you modify this Program, or any covered work, by linking or
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
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(or a modified version of those libraries),
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
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licensors of this Program grant you additional
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permission to convey the resulting work. Corresponding Source for a
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non-source form of such a combination shall include the source code for
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
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work.
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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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// plBufferedFileReader - Reads in a given file into a RAM buffer, then //
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// "reads" from that buffer as requested. Useless //
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// for normal sounds, but perfect for streaming //
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// from RAM. //
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// //
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//// Notes ///////////////////////////////////////////////////////////////////
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// //
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// 11.1.2002 - Created by mcn. //
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// //
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//////////////////////////////////////////////////////////////////////////////
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#include "HeadSpin.h"
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#include "plBufferedFileReader.h"
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#include "plFileSystem.h"
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//#include "plProfile.h"
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//plProfile_CreateMemCounter( "BufferedRAM", "Sound", SndBufferedMem );
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//// Constructor/Destructor //////////////////////////////////////////////////
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plBufferedFileReader::plBufferedFileReader( const plFileName &path, plAudioCore::ChannelSelect whichChan )
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{
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// Init some stuff
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fBufferSize = 0;
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fBuffer = nil;
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fCursor = 0;
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hsAssert( path.IsValid(), "Invalid path specified in plBufferedFileReader" );
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// Ask plAudioFileReader for another reader to get this file
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// Note: have this reader do the chanSelect for us
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plAudioFileReader *reader = plAudioFileReader::CreateReader( path, whichChan );
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if( reader == nil || !reader->IsValid() )
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{
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delete reader;
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IError( "Unable to open file to read in to RAM buffer" );
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return;
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}
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fHeader = reader->GetHeader();
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fBufferSize = reader->GetDataSize();
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fBuffer = new uint8_t[ fBufferSize ];
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//plProfile_NewMem( SndBufferedMem, fBufferSize );
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if( fBuffer == nil )
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{
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delete reader;
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IError( "Unable to allocate RAM buffer" );
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return;
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}
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if( !reader->Read( fBufferSize, fBuffer ) )
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{
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delete reader;
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IError( "Unable to read file into RAM buffer" );
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return;
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}
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// All done!
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delete reader;
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}
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plBufferedFileReader::~plBufferedFileReader()
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{
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Close();
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}
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void plBufferedFileReader::Close( void )
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{
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//plProfile_DelMem( SndBufferedMem, fBufferSize );
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delete fBuffer;
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fBuffer = nil;
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fBufferSize = 0;
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fCursor = 0;
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}
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void plBufferedFileReader::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 &plBufferedFileReader::GetHeader( void )
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{
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hsAssert( IsValid(), "GetHeader() called on an invalid RAM buffer" );
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return fHeader;
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}
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float plBufferedFileReader::GetLengthInSecs( void )
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{
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hsAssert( IsValid(), "GetLengthInSecs() called on an invalid RAM buffer" );
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return (float)fBufferSize / (float)fHeader.fAvgBytesPerSec;
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}
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bool plBufferedFileReader::SetPosition( uint32_t numBytes )
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{
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hsAssert( IsValid(), "SetPosition() called on an invalid RAM buffer" );
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if( numBytes > fBufferSize )
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{
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hsAssert( false, "Invalid position in SetPosition()" );
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return false;
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}
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fCursor = numBytes;
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return true;
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}
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bool plBufferedFileReader::Read( uint32_t numBytes, void *buffer )
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{
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hsAssert( IsValid(), "Read() called on an invalid RAM buffer" );
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bool valid = true;
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if( fCursor + numBytes > fBufferSize )
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{
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numBytes = fBufferSize - fCursor;
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valid = false;
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}
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memcpy( buffer, fBuffer + fCursor, numBytes );
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fCursor += numBytes;
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return valid;
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}
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uint32_t plBufferedFileReader::NumBytesLeft( void )
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{
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hsAssert( IsValid(), "NumBytesLeft() called on an invalid RAM buffer" );
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return fBufferSize - fCursor;
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}
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