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Fix WAV streaming playback speed #118

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Merged
dogo merged 1 commit into from
Dec 24, 2025
Merged

Fix WAV streaming playback speed #118

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25 changes: 14 additions & 11 deletions src/audio/audio.c
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Original file line number Diff line number Diff line change
Expand Up @@ -243,17 +243,20 @@ void oslDecodeWav(unsigned int i, void* buf, unsigned int length) {

// Handle streamed audio
if (wav->stream) {
len = (length * wav->fmt.bits_sample) >> 3;
if (samples == 1) {
len <<= 1; // Double the length if necessary
} else {
len >>= osl_audioVoices[i].divider;
}

// Adjust length for stereo sound
if (osl_audioVoices[i].mono == 0) {
len <<= 1;
}
// Calculate bytes needed from file:
// length = number of output samples
// For mono: length samples * (bits/8) bytes
// For stereo: length samples * 2 channels * (bits/8) bytes
// For resampling (samples > 1): divide by samples since we duplicate

int bytes_per_sample = wav->fmt.bits_sample >> 3; // 2 for 16-bit
int channels = (osl_audioVoices[i].mono == 0) ? 2 : 1;

// How many source samples do we need?
int source_samples = length / samples; // Account for resampling

// Total bytes = source_samples * channels * bytes_per_sample
len = source_samples * channels * bytes_per_sample;

// Allocate buffer dynamically instead of using alloca
streambuffer = (unsigned char*)malloc(len);
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