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Code Issues Releases Wiki Activity

[audio, microphone] - Allow MicrophoneSource to passively capture/optimization (#8732)

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This commit is contained in:
Kevin Ahrendt
2025-05-09 16:54:33 -05:00
committed by GitHub
parent 8399d894c1
commit bec9d91419
4 changed files with 50 additions and 33 deletions
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25
esphome/components/audio/audio.h
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@@ -135,7 +135,7 @@ 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.
/// @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
@@ -160,5 +160,28 @@ inline int32_t unpack_audio_sample_to_q31(const uint8_t *data, size_t bytes_per_
return sample;
}
/// @brief Packs a Q31 fixed-point number as an audio sample with the specified number of bytes per sample.
/// Packs the most significant bits - no dithering is applied.
/// @param sample Q31 fixed-point number to pack
/// @param data Pointer to data array to store
/// @param bytes_per_sample The audio data's bytes per sample
inline void pack_q31_as_audio_sample(int32_t sample, uint8_t *data, size_t bytes_per_sample) {
if (bytes_per_sample == 1) {
data[0] = static_cast<uint8_t>(sample >> 24);
} else if (bytes_per_sample == 2) {
data[0] = static_cast<uint8_t>(sample >> 16);
data[1] = static_cast<uint8_t>(sample >> 24);
} else if (bytes_per_sample == 3) {
data[0] = static_cast<uint8_t>(sample >> 8);
data[1] = static_cast<uint8_t>(sample >> 16);
data[2] = static_cast<uint8_t>(sample >> 24);
} else if (bytes_per_sample == 4) {
data[0] = static_cast<uint8_t>(sample);
data[1] = static_cast<uint8_t>(sample >> 8);
data[2] = static_cast<uint8_t>(sample >> 16);
data[3] = static_cast<uint8_t>(sample >> 24);
}
}
} // namespace audio
} // namespace esphome