esp_equalizer.h

[caiosignor]

Where is the implementation of this header?

I'm trying to run a equalizer, but I got this error:
/opt/espadf/esp32-bt-player/build/esp-adf-libs/libesp-adf-libs.a(equalizer.o): In function equalizer_close': /opt/espadf/esp-adf/components/esp-adf-libs/esp_codec/equalizer.c:114: undefined reference to esp_equalizer_uninit'
/opt/espadf/esp32-bt-player/build/esp-adf-libs/libesp-adf-libs.a(equalizer.o): In function equalizer_open': /opt/espadf/esp-adf/components/esp-adf-libs/esp_codec/equalizer.c:114: undefined reference to esp_equalizer_init'
/opt/espadf/esp-adf/components/esp-adf-libs/esp_codec/equalizer.c:114: undefined reference to esp_equalizer_set_band_value' /opt/espadf/esp32-bt-player/build/esp-adf-libs/libesp-adf-libs.a(equalizer.o): In function equalizer_process':
/opt/espadf/esp-adf/components/esp-adf-libs/esp_codec/equalizer.c:114: undefined reference to `esp_equalizer_process'