mirror of
https://github.com/sle118/squeezelite-esp32.git
synced 2025-12-07 20:17:04 +03:00
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
|
|
// All rights reserved.
|
|
|
|
#ifndef _ESP_EQUALIZER_H
|
|
#define _ESP_EQUALIZER_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/**
|
|
* @brief Initialize the equalizer handle
|
|
*
|
|
* @param nch The audio channel number
|
|
* @param g_rate The audio sample rate. Four sample rates are supported: 11025Hz, 22050Hz, 44100Hz and 48000Hz.
|
|
* @param n_band The number of audio sub-bands. Fixed number of 10 sub-bands is supported and this value should be set to 10.
|
|
* @param use_xmms_original_freqs Currently should be set 0
|
|
*
|
|
* @return The equalizer handle.
|
|
*/
|
|
void *esp_equalizer_init(int nch, int g_rate, int n_band, int use_xmms_original_freqs);
|
|
|
|
/**
|
|
* @brief Uninitialize the equalizer handle.
|
|
*
|
|
* @param handle The the equalizer handle
|
|
*/
|
|
void esp_equalizer_uninit(void *handle);
|
|
|
|
/**
|
|
* @brief Process the data through the equalizer
|
|
*
|
|
* @param handle The the equalizer handle
|
|
* @param pcm_buf The audio pcm input & output buffer
|
|
* @param length The length of current bytes in pcm_buf
|
|
* @param g_rate The audio sample rate. Four sample rates are supported: 11025Hz, 22050Hz, 44100Hz and 48000Hz.
|
|
* @param nch The audio channel number
|
|
*
|
|
* @return Length of pcm_buf after processing
|
|
*/
|
|
int esp_equalizer_process(void *handle, unsigned char *pcm_buf, int length, int g_rate, int nch);
|
|
|
|
/**
|
|
* @brief Set the number of sub-bands for the equalizer
|
|
*
|
|
* @param handle The the equalizer handle
|
|
* @param value The audio sub-bands gain. unit:db. 0 means no gain.
|
|
* @param index The index of audio sub-bands. e.g. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
|
|
* @param nch The audio channel number
|
|
*/
|
|
void esp_equalizer_set_band_value(void *handle, float value, int index, int nch);
|
|
|
|
/**
|
|
* @brief Get the number of the equalizer sub-bands
|
|
*
|
|
* @param handle The the equalizer handle
|
|
*
|
|
* @return The number of the equalizer sub-bands
|
|
*/
|
|
int esp_equalizer_get_band_count(void *handle);
|
|
|
|
/**
|
|
* @brief Get the value of the equalizer sub-bands
|
|
*
|
|
* @param handle The the equalizer handle
|
|
* @param index The index of audio sub-bands. Currently only support 10 sub-bands, so it should be 0-9.
|
|
* @param nch The audio channel number
|
|
*
|
|
* @return The number of the equalizer sub-bands
|
|
*/
|
|
float esp_equalizer_get_band_value(void *handle, int index, int nch);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|