本文整理汇总了C++中AudioChunk::channels方法的典型用法代码示例。如果您正苦于以下问题：C++ AudioChunk::channels方法的具体用法？C++ AudioChunk::channels怎么用？C++ AudioChunk::channels使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类AudioChunk的用法示例。
在下文中一共展示了AudioChunk::channels方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: pull
void Oscillator::pull(AudioChunk &chunk, const State &a, const State &b)
{
//Phase goes from -1 to 1. Wierd? Maybe.
while (phase >= 1.0f) phase -= 2.0f;
while (phase < -1.0f) phase += 2.0f;
Sint32 samp;
float v, x, sq;
float step = (b.freq / output.rate) * 2.0f,
amp = b.amp * 16777215.0f,
ph = phase;
Sint32 *i = chunk.start(0), *e = chunk.end(0);
switch (type)
{
case SINE:
while (i != e)
{
//Simple sine wave
samp = amp*sin(PI * ph);
ph += step;
*i = samp; ++i;
ph -= 2.0f*int(ph*.5f); //Restrict to [-1, 1]
}
break;
case SQUARE:
while (i != e)
{
samp = amp * ((ph>=0.0f) ? 1.0f : -1.0f);
ph += step;
*i = samp; ++i;
ph -= 2.0f*int(ph*.5f); //Restrict to [-1, 1]
}
break;
case TRIANGLE:
while (i != e)
{
samp = amp * (2.0f*std::abs(ph) - 1.0f);
ph += step;
*i = samp; ++i;
ph -= 2.0f*int(ph*.5f); //Restrict to [-1, 1]
}
break;
case SAWTOOTH:
while (i != e)
{
samp = amp * ph;
ph += step;
*i = samp; ++i;
ph -= 2.0f*int(ph*.5f); //Restrict to [-1, 1]
}
break;
case KLAXON:
default:
{
const float PISQ = PI*PI;
while (i != e)
{
//Sine wave approximation gone wrong
sq = PISQ*ph*ph; x = PI*ph*amp;
v = x * 1.02394347; //Makes the endpoints line up
x *= sq; v -= x/6.0f;
x *= sq; v += x/120.0f;
x *= sq; v -= x/5040.0f;
samp = x;
ph += step;
*i = samp; ++i;
ph -= 2.0f*int(ph*.5f); //Restrict to [-1, 1]
}
}
break;
}
phase = ph;
//Copy signal into all other channels
for (Uint32 c = chunk.channels()-1; c > 0; --c)
{
std::memcpy(chunk.start(c), chunk.start(0), 4*chunk.length());
}
}