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Code Issues Releases Wiki Activity

[audio, microphone] Quantization Improvements (#8695)

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This commit is contained in:
Kevin Ahrendt
2025-05-05 16:23:50 -05:00
committed by GitHub
parent 1ac56b06c5
commit 88be14aaa3
3 changed files with 97 additions and 44 deletions
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25
esphome/components/audio/audio.h
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@@ -135,5 +135,30 @@ const char *audio_file_type_to_string(AudioFileType file_type);
void scale_audio_samples(const int16_t *audio_samples, int16_t *output_buffer, int16_t scale_factor,
size_t samples_to_scale);
/// @brief Unpacks a quantized audio sample into a Q31 fixed point number.
/// @param data Pointer to uint8_t array containing the audio sample
/// @param bytes_per_sample The number of bytes per sample
/// @return Q31 sample
inline int32_t unpack_audio_sample_to_q31(const uint8_t *data, size_t bytes_per_sample) {
int32_t sample = 0;
if (bytes_per_sample == 1) {
sample |= data[0] << 24;
} else if (bytes_per_sample == 2) {
sample |= data[0] << 16;
sample |= data[1] << 24;
} else if (bytes_per_sample == 3) {
sample |= data[0] << 8;
sample |= data[1] << 16;
sample |= data[2] << 24;
} else if (bytes_per_sample == 4) {
sample |= data[0];
sample |= data[1] << 8;
sample |= data[2] << 16;
sample |= data[3] << 24;
}
return sample;
}
} // namespace audio
} // namespace esphome