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166 lines
4.3 KiB
166 lines
4.3 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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// 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 <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "hsTypes.h" |
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#include "plBufferedFileReader.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 char *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 != nil, "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 = TRACKED_NEW UInt8[ 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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DEL(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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hsBool plBufferedFileReader::SetPosition( UInt32 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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hsBool plBufferedFileReader::Read( UInt32 numBytes, void *buffer ) |
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{ |
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hsAssert( IsValid(), "Read() called on an invalid RAM buffer" ); |
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hsBool 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 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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