OggData.cpp

Go to the documentation of this file.

/* Copyright (C) 2012 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "precompiled.h"

#include "OggData.h"


#if CONFIG2_AUDIO

#include "ps/CLogger.h"
#include "ps/Filesystem.h"
#include "soundmanager/SoundManager.h"
#include "ps/CLogger.h"

COggData::COggData()
{
    m_OneShot = false;
    m_Format = 0;
    m_Frequency = 0;
    m_BuffersUsed = 0;
}

COggData::~COggData()
{
    AL_CHECK
    ogg->Close();

    AL_CHECK
    if ( m_BuffersUsed > 0 )
        alDeleteBuffers(m_BuffersUsed, &m_Buffer[0] );

    AL_CHECK
    m_BuffersUsed = 0;
}

void COggData::SetFormatAndFreq(int form, ALsizei freq)
{
    m_Format = form;
    m_Frequency = freq;
}

bool COggData::IsStereo()
{
    return ( m_Format == AL_FORMAT_STEREO16 );
}

bool COggData::InitOggFile(const VfsPath& itemPath)
{
  if ( CSoundManager* sndManager = (CSoundManager*)g_SoundManager )
  {
        int buffersToStart = sndManager->GetBufferCount();  
        if ( OpenOggNonstream( g_VFS, itemPath, ogg) == INFO::OK )
        {
            m_FileFinished = false;

            SetFormatAndFreq(ogg->Format(), ogg->SamplingRate() );
            SetFileName( itemPath );
        
            AL_CHECK
            
            alGenBuffers(buffersToStart, m_Buffer);
            
            if(alGetError() != AL_NO_ERROR) 
            {
                LOGERROR( L"- Error creating initial buffer !!\n");
                return false;
            }
            else
            {
                m_BuffersUsed = FetchDataIntoBuffer(buffersToStart, m_Buffer);
                if (m_FileFinished)
                {
                    m_OneShot = true;
                    if (m_BuffersUsed < buffersToStart)
                    {
                        alDeleteBuffers(buffersToStart - m_BuffersUsed, &m_Buffer[m_BuffersUsed]);
                    }
                }
                AL_CHECK
            }
            return true;
      }
        return false;
    }
    return false;
}

ALsizei COggData::GetBufferCount()
{
    return m_BuffersUsed;
}

bool COggData::IsFileFinished()
{
    return m_FileFinished;
}

void COggData::ResetFile()
{
    ogg->ResetFile();
    m_FileFinished = false;
}

bool COggData::IsOneShot()
{
    return m_OneShot;
}

int COggData::FetchDataIntoBuffer(int count, ALuint* buffers)
{
  if ( CSoundManager* sndManager = (CSoundManager*)g_SoundManager )
  {
        long bufferSize = sndManager->GetBufferSize();
        
        u8* pcmout = new u8[bufferSize + 5000];
        int buffersWritten = 0;
        
        for (int i = 0; (i < count) && !m_FileFinished; i++)
        {
            memset( pcmout, 0, bufferSize + 5000 );
            Status totalRet = ogg->GetNextChunk( pcmout, bufferSize);
            m_FileFinished = ogg->atFileEOF();
            if (totalRet > 0)
            {
                buffersWritten++;
                alBufferData(buffers[i], m_Format, pcmout, (ALsizei)totalRet, (int)m_Frequency);
            }
        }
        delete[] pcmout;
        return buffersWritten;
    }
    return 0;
}


ALuint COggData::GetBuffer()
{
    return m_Buffer[0];
}

ALuint* COggData::GetBufferPtr()
{
    return m_Buffer;
}

#endif // CONFIG2_AUDIO