The Audio Effect API provides functions to control the audio effect.

Required Header

#include <player.h>

Overview

The Audio effect API allows you to apply effects to the player:

Equalizer

Functions
int	player_audio_effect_get_equalizer_bands_count (player_h player, int *count)
	Gets the number of equalizer bands.
int	player_audio_effect_set_equalizer_band_level (player_h player, int index, int level)
	Sets the gain set for the given equalizer band.
int	player_audio_effect_get_equalizer_band_level (player_h player, int index, int *level)
	Gets the gain set for the given equalizer band.
int	player_audio_effect_set_equalizer_all_bands (player_h player, int *band_levels, int length)
	Sets all bands of the equalizer.
int	player_audio_effect_get_equalizer_level_range (player_h player, int min, int max)
	Gets the valid band level range of the equalizer.
int	player_audio_effect_get_equalizer_band_frequency (player_h player, int index, int *frequency)
	Gets the band frequency of the equalizer.
int	player_audio_effect_get_equalizer_band_frequency_range (player_h player, int index, int *range)
	Gets the band frequency range of the equalizer.
int	player_audio_effect_equalizer_clear (player_h player)
	Clears the equalizer effect.
int	player_audio_effect_equalizer_is_available (player_h player, bool *available)
	Checks whether the custom equalizer effect is available.

Function Documentation

int player_audio_effect_equalizer_clear ( player_h player )

Clears the equalizer effect.

Since :: 2.3

Parameters:

[in] player The handle to the media player

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_OPERATION	Invalid operation
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available(); player_audio_effect_set_equalizer_band_level(); player_audio_effect_set_equalizer_all_bands()

int player_audio_effect_equalizer_is_available	(	player_h	player,
		bool *	available
	)

Checks whether the custom equalizer effect is available.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[out]	available	If `true` the specified audio effect is available, otherwise `false`

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_set_equalizer_band_level(); player_audio_effect_set_equalizer_all_bands()

int player_audio_effect_get_equalizer_band_frequency	(	player_h	player,
		int	index,
		int *	frequency
	)

Gets the band frequency of the equalizer.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[in]	index	The index of the requested equalizer band
[out]	frequency	The frequency of the given band [dB]

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available()

int player_audio_effect_get_equalizer_band_frequency_range	(	player_h	player,
		int	index,
		int *	range
	)

Gets the band frequency range of the equalizer.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[in]	index	The index of the requested equalizer band
[out]	range	The frequency range of the given band [dB]

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available()

int player_audio_effect_get_equalizer_band_level	(	player_h	player,
		int	index,
		int *	level
	)

Gets the gain set for the given equalizer band.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[in]	index	The index of the requested equalizer band
[out]	level	The gain in decibel of the given band [dB]

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available(); player_audio_effect_set_equalizer_band_level()

int player_audio_effect_get_equalizer_bands_count	(	player_h	player,
		int *	count
	)

Gets the number of equalizer bands.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[out]	count	The number of equalizer bands

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available(); player_audio_effect_set_equalizer_band_level(); player_audio_effect_set_equalizer_all_bands()

int player_audio_effect_get_equalizer_level_range	(	player_h	player,
		int *	min,
		int *	max
	)

Gets the valid band level range of the equalizer.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[out]	min	The minimum value to be set [dB]
[out]	max	The maximum value to be set [dB]

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_STATE	Invalid player state
PLAYER_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available(); player_audio_effect_set_equalizer_band_level(); player_audio_effect_set_equalizer_all_bands()

int player_audio_effect_set_equalizer_all_bands	(	player_h	player,
		int *	band_levels,
		int	length
	)

Sets all bands of the equalizer.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[in]	band_levels	The list of band levels to be set
[in]	length	The length of the band level

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_OPERATION	Invalid operation
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available(); player_audio_effect_get_equalizer_bands_count(); player_audio_effect_get_equalizer_level_range(); player_audio_effect_set_equalizer_band_level()

int player_audio_effect_set_equalizer_band_level	(	player_h	player,
		int	index,
		int	level
	)

Sets the gain set for the given equalizer band.

Since :: 2.3

Parameters:

[in]	player	The handle to the media player
[in]	index	The index of the equalizer band to be set
[in]	level	The new gain in decibel that is set to the given band [dB]

Returns:: 0 on success, otherwise a negative error value

Return values:

PLAYER_ERROR_NONE	Successful
PLAYER_ERROR_INVALID_PARAMETER	Invalid parameter
PLAYER_ERROR_INVALID_OPERATION	Invalid operation
PLAYER_ERROR_INVALID_STATE	Invalid player state

Precondition:: The player state must be one of PLAYER_STATE_IDLE, PLAYER_STATE_READY, PLAYER_STATE_PLAYING, or PLAYER_STATE_PAUSED.

See also:: player_audio_effect_equalizer_is_available(); player_audio_effect_get_equalizer_bands_count(); player_audio_effect_get_equalizer_level_range(); player_audio_effect_get_equalizer_band_level(); player_audio_effect_set_equalizer_all_bands()

Required Header

Overview

Functions

Function Documentation