jeans/esphome
jeans/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2025-07-28 14:16:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

[micro_wake_word] Clarify spectrogram features calculation (#8669)

Browse Source
This commit is contained in:
Kevin Ahrendt 2025-05-01 14:04:23 -05:00 committed by GitHub
parent db97440b04
commit 2eb9582d0f
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
esphome/components/micro_wake_word/micro_wake_word.cpp
View File

@ -404,8 +404,8 @@ size_t MicroWakeWord::generate_features_(int16_t *audio_buffer, size_t samples_a
constexpr int32_t value_div = 666; // 666 = 25.6 * 26.0 after rounding
int32_t value = ((frontend_output.values[i] * value_scale) + (value_div / 2)) / value_div;
value -= INT8_MIN;
features_buffer[i] = clamp<int8_t>(value, INT8_MIN, INT8_MAX);
value += INT8_MIN; // Adds a -128; i.e., subtracts 128
features_buffer[i] = static_cast<int8_t>(clamp<int32_t>(value, INT8_MIN, INT8_MAX));
}
return processed_samples;