C++ (Cpp) INC_POS_STEREO_LOOPED示例

示例#1

文件： SoundSource.cpp 项目： AliAkbarMontazeri/AtomicGameEngine

void SoundSource::MixStereoToStereo(Sound* sound, int* dest, unsigned samples, int mixRate)
{
    float totalGain = masterGain_ * attenuation_ * gain_;
    int vol = (int)(256.0f * totalGain + 0.5f);
    if (!vol)
    {
        MixZeroVolume(sound, samples, mixRate);
        return;
    }

    float add = frequency_ / (float)mixRate;
    int intAdd = (int)add;
    int fractAdd = (int)((add - floorf(add)) * 65536.0f);
    int fractPos = fractPosition_;

    if (sound->IsSixteenBit())
    {
        short* pos = (short*)position_;
        short* end = (short*)sound->GetEnd();
        short* repeat = (short*)sound->GetRepeat();

        if (sound->IsLooped())
        {
            while (samples--)
            {
                *dest = *dest + (pos[0] * vol) / 256;
                ++dest;
                *dest = *dest + (pos[1] * vol) / 256;
                ++dest;
                INC_POS_STEREO_LOOPED();
            }
            position_ = (signed char*)pos;
        }
        else
        {
            while (samples--)
            {
                *dest = *dest + (pos[0] * vol) / 256;
                ++dest;
                *dest = *dest + (pos[1] * vol) / 256;
                ++dest;
                INC_POS_STEREO_ONESHOT();
            }
            position_ = (signed char*)pos;
        }
    }
    else
    {
        signed char* pos = (signed char*)position_;
        signed char* end = sound->GetEnd();
        signed char* repeat = sound->GetRepeat();

        if (sound->IsLooped())
        {
            while (samples--)
            {
                *dest = *dest + pos[0] * vol;
                ++dest;
                *dest = *dest + pos[1] * vol;
                ++dest;
                INC_POS_STEREO_LOOPED();
            }
            position_ = pos;
        }
        else
        {
            while (samples--)
            {
                *dest = *dest + pos[0] * vol;
                ++dest;
                *dest = *dest + pos[1] * vol;
                ++dest;
                INC_POS_STEREO_ONESHOT();
            }
            position_ = pos;
        }
    }

    fractPosition_ = fractPos;
}

示例#2

文件： SoundSource.cpp 项目： acremean/urho3d

void SoundSource::MixStereoToMonoIP(Sound* sound, int* dest, unsigned samples, int mixRate)
{
    float totalGain = audio_->GetSoundSourceMasterGain(soundType_) * attenuation_ * gain_;
    int vol = (int)(256.0f * totalGain + 0.5f);
    if (!vol)
    {
        MixZeroVolume(sound, samples, mixRate);
        return;
    }
    
    float add = frequency_ / (float)mixRate;
    int intAdd = (int)add;
    int fractAdd = (int)((add - floorf(add)) * 65536.0f);
    int fractPos = fractPosition_;
    
    if (sound->IsSixteenBit())
    {
        short* pos = (short*)position_;
        short* end = (short*)sound->GetEnd();
        short* repeat = (short*)sound->GetRepeat();
        
        if (sound->IsLooped())
        {
            while (--samples)
            {
                int s = (GET_IP_SAMPLE_LEFT() + GET_IP_SAMPLE_RIGHT()) / 2;
                *dest = *dest + (s * vol) / 256;
                ++dest;
                INC_POS_STEREO_LOOPED();
            }
            position_ = (signed char*)pos;
        }
        else
        {
            while (--samples)
            {
                int s = (GET_IP_SAMPLE_LEFT() + GET_IP_SAMPLE_RIGHT()) / 2;
                *dest = *dest + (s * vol) / 256;
                ++dest;
                INC_POS_STEREO_ONESHOT();
            }
            position_ = (signed char*)pos;
        }
    }
    else
    {
        signed char* pos = (signed char*)position_;
        signed char* end = sound->GetEnd();
        signed char* repeat = sound->GetRepeat();
        
        if (sound->IsLooped())
        {
            while (--samples)
            {
                int s = (GET_IP_SAMPLE_LEFT() + GET_IP_SAMPLE_RIGHT()) / 2;
                *dest = *dest + s * vol;
                ++dest;
                INC_POS_STEREO_LOOPED();
            }
            position_ = pos;
        }
        else
        {
            while (--samples)
            {
                int s = (GET_IP_SAMPLE_LEFT() + GET_IP_SAMPLE_RIGHT()) / 2;
                *dest = *dest + s * vol;
                ++dest;
                INC_POS_STEREO_ONESHOT();
            }
            position_ = pos;
        }
    }
    
    fractPosition_ = fractPos;
}