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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
This commit is contained in:
lipx
2023-12-13 17:19:14 -03:00
committed by GitHub
parent 9322ad0f9b
commit a57a0ecd96
1 changed files with 10 additions and 6 deletions
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12
examples/audio/audio_stream_effects.c
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@@ -2,7 +2,7 @@
* *
* raylib [audio] example - Music stream processing effects * 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, * Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software * BSD-like license that allows static linking with closed source software
@@ -149,13 +149,17 @@ static void AudioProcessEffectLPF(void *buffer, unsigned int frames)
static const float cutoff = 70.0f / 44100.0f; // 70 Hz lowpass filter static const float cutoff = 70.0f / 44100.0f; // 70 Hz lowpass filter
const float k = cutoff / (cutoff + 0.1591549431f); // RC filter formula 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) 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[0] += k * (l - low[0]);
low[1] += k * (r - low[1]); low[1] += k * (r - low[1]);
((float *)buffer)[i] = low[0]; bufferData[i] = low[0];
((float *)buffer)[i + 1] = low[1]; bufferData[i + 1] = low[1];
} }
} }