CBufferItem.cpp

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/* Copyright (C) 2013 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 "CBufferItem.h"

#if CONFIG2_AUDIO

#include "soundmanager/data/SoundData.h"
#include "soundmanager/SoundManager.h"

#include <iostream>

CBufferItem::CBufferItem(CSoundData* sndData)
{
    ResetVars();
    if (InitOpenAL())
        Attach(sndData);
}


CBufferItem::~CBufferItem()
{
    Stop();
    ReleaseOpenALBuffer();
}


void CBufferItem::ReleaseOpenALBuffer()
{
    if ( m_ALSource == 0 )
        return;

    int num_processed;
    AL_CHECK
    alGetSourcei(m_ALSource, AL_BUFFERS_PROCESSED, &num_processed);
    AL_CHECK

    if (num_processed > 0)
    {
        ALuint* al_buf = new ALuint[num_processed];
        alSourceUnqueueBuffers(m_ALSource, num_processed, al_buf);
        
        AL_CHECK
        delete[] al_buf;
    }
    alSourcei(m_ALSource, AL_BUFFER, 0);
    ((CSoundManager*)g_SoundManager)->ReleaseALSource(m_ALSource);
    AL_CHECK

    m_ALSource = 0;
}

bool CBufferItem::IdleTask()
{
    if ( m_ALSource == 0 )
        return false;

    HandleFade();
    
    if (m_LastPlay)
    {
        CScopeLock lock(m_ItemMutex);
        int proc_state;
        alGetSourcei(m_ALSource, AL_SOURCE_STATE, &proc_state);
        AL_CHECK
        m_ShouldBePlaying = (proc_state != AL_STOPPED);
        return (proc_state != AL_STOPPED);
    }
    
    if (GetLooping())
    {
        int num_processed;
        AL_CHECK
        alGetSourcei(m_ALSource, AL_BUFFERS_PROCESSED, &num_processed);
        
        AL_CHECK
        for (int i = 0; i < num_processed; i++)
        {
            ALuint al_buf;
            alSourceUnqueueBuffers(m_ALSource, 1, &al_buf);
            AL_CHECK
            alSourceQueueBuffers(m_ALSource, 1, &al_buf);
            AL_CHECK
        }
    }

    return true;
}

void CBufferItem::Attach(CSoundData* itemData)
{
    if ( m_ALSource == 0 )
        return;
    
    AL_CHECK
    if (m_SoundData != NULL)
    {
        CSoundData::ReleaseSoundData(m_SoundData);
        m_SoundData = 0;
    }
    AL_CHECK
    if (itemData != NULL)
    {
        m_SoundData = itemData->IncrementCount();
        alSourceQueueBuffers(m_ALSource, m_SoundData->GetBufferCount(),(const ALuint *) m_SoundData->GetBufferPtr());
        AL_CHECK
    }
}

void CBufferItem::SetLooping(bool loops)
{
    m_Looping = loops;
}

#endif // CONFIG2_AUDIO