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Update audio_stream_effects.c (#3618)

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* Update audio_stream_effects.c

This may slightly improve performance and be more welcoming for new users despite being an more advanced feature. 
void * usually throws an error in most compilers and it would be better to just avoid it.

Also added <stdbool.h> because booleans are, sometimes, not defined by <stddef.h>.

* Update audio_stream_effects.c
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lipx 2023-12-13 17:19:14 -03:00 committed by GitHub
parent 9322ad0f9b
commit a57a0ecd96
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1 changed files with 10 additions and 6 deletions
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16
examples/audio/audio_stream_effects.c
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@ -2,7 +2,7 @@
*
* raylib [audio] example - Music stream processing effects
*
* Example originally created with raylib 4.2, last time updated with raylib 4.2
* Example originally created with raylib 4.2, last time updated with raylib 5.0
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
@ -13,7 +13,7 @@
#include "raylib.h"
#include <stdlib.h> // Required for: NULL
#include <stdlib.h> // Required for: NULL
// Required delay effect variables
static float *delayBuffer = NULL;
@ -149,13 +149,17 @@ static void AudioProcessEffectLPF(void *buffer, unsigned int frames)
static const float cutoff = 70.0f / 44100.0f; // 70 Hz lowpass filter
const float k = cutoff / (cutoff + 0.1591549431f); // RC filter formula
// Converts the buffer data before using it
float *bufferData = (float *)buffer;
for (unsigned int i = 0; i < frames*2; i += 2)
{
float l = ((float *)buffer)[i], r = ((float *)buffer)[i + 1];
const float l = bufferData[i];
const float r = bufferData[i + 1];
low[0] += k * (l - low[0]);
low[1] += k * (r - low[1]);
((float *)buffer)[i] = low[0];
((float *)buffer)[i + 1] = low[1];
bufferData[i] = low[0];
bufferData[i + 1] = low[1];
}
}
@ -176,4 +180,4 @@ static void AudioProcessEffectDelay(void *buffer, unsigned int frames)
delayBuffer[delayWriteIndex++] = ((float *)buffer)[i + 1];
if (delayWriteIndex == delayBufferSize) delayWriteIndex = 0;
}
}
}