audio_mixer.h File Reference

#include <stddef.h>
#include "compiler.h"

Macros
#define	audio_mixer_close(...)   audio_mixer_close_direct(__VA_ARGS__)
#define	audio_mixer_create_buffers(...)   audio_mixer_create_buffers_direct(__VA_ARGS__)
#define	audio_mixer_dacs_decrease_volume(...)   audio_mixer_dacs_decrease_volume_direct(__VA_ARGS__)
#define	audio_mixer_dacs_flush(...)   audio_mixer_dacs_flush_direct(__VA_ARGS__)
#define	audio_mixer_dacs_get_volume(...)   audio_mixer_dacs_get_volume_direct(__VA_ARGS__)
#define	audio_mixer_dacs_increase_volume(...)   audio_mixer_dacs_increase_volume_direct(__VA_ARGS__)
#define	audio_mixer_dacs_input(...)   audio_mixer_dacs_input_direct(__VA_ARGS__)
#define	audio_mixer_dacs_is_volume_muted(...)   audio_mixer_dacs_is_volume_muted_direct(__VA_ARGS__)
#define	audio_mixer_dacs_output(...)   audio_mixer_dacs_output_direct(__VA_ARGS__)
#define	audio_mixer_dacs_set_volume(...)   audio_mixer_dacs_set_volume_direct(__VA_ARGS__)
#define	audio_mixer_dacs_setup(...)   audio_mixer_dacs_setup_direct(__VA_ARGS__)
#define	audio_mixer_dacs_start(...)   audio_mixer_dacs_start_direct(__VA_ARGS__)
#define	audio_mixer_dacs_stop(...)   audio_mixer_dacs_stop_direct(__VA_ARGS__)
#define	audio_mixer_disable_dacs(...)   audio_mixer_disable_dacs_direct(__VA_ARGS__)
#define	audio_mixer_enable_dacs(...)   audio_mixer_enable_dacs_direct(__VA_ARGS__)
#define	audio_mixer_get_buffer(...)   audio_mixer_get_buffer_direct(__VA_ARGS__)
#define	audio_mixer_mute_audio(...)   audio_mixer_mute_audio_direct(__VA_ARGS__)

Functions
void	audio_mixer_close_direct (void)
	Close the audio_mixer. More...
bool	audio_mixer_create_buffers_direct (uint8_t nb_buffers, size_t buffer_size)
	Creates DAC buffers. More...
void	audio_mixer_dacs_decrease_volume_direct (void)
	Decreases the output volume of the DACs. More...
void	audio_mixer_dacs_flush_direct (bool force)
	Flushes the sample buffer being output to the DACs. More...
uint8_t	audio_mixer_dacs_get_volume_direct (void)
	Get the average volume of the DACs. The value returned is in the range 0; 255 where 255 corresponds to the highest volume. More...
void	audio_mixer_dacs_increase_volume_direct (void)
	Increases the output volume of the DACs. More...
bool	audio_mixer_dacs_input_direct (void *sample_buffer, size_t sample_length)
	Inputs a sample buffer from the ADCs. More...
bool	audio_mixer_dacs_is_volume_muted_direct (void)
	Checks if the volume is muted or un-muted. . More...
bool	audio_mixer_dacs_output_direct (void *sample_buffer, size_t sample_length)
	Outputs a sample buffer to the DACs. More...
void	audio_mixer_dacs_set_volume_direct (uint8_t volume)
	set the average volume of the DACs. More...
void	audio_mixer_dacs_setup_direct (uint32_t sample_rate_hz, uint8_t num_channels, uint8_t bits_per_sample, bool swap_channels)
	Sets the DACs up with new settings. More...
void	audio_mixer_dacs_start_direct (uint32_t sample_rate_hz, uint8_t num_channels, uint8_t bits_per_sample, bool swap_channels)
	Starts the DACs. More...
void	audio_mixer_dacs_stop_direct (void)
	Stops the DACs. More...
void	audio_mixer_disable_dacs_direct (uint32_t dacs_mask)
	Disables the handling of the specified DACs by the audio mixer. More...
void	audio_mixer_enable_dacs_direct (uint32_t dacs_mask)
	Enables the handling of the specified DACs by the audio mixer. More...
void *	audio_mixer_get_buffer_direct (size_t size)
	This functions returns a NULL pointer when no buffer are free, else returns a free temporary buffer. More...
void	audio_mixer_mute_audio_direct (bool mute)
	Mute Audio if True. More...

#define audio_mixer_close

(

...

)

audio_mixer_close_direct(__VA_ARGS__)

#define audio_mixer_create_buffers

(

...

)

audio_mixer_create_buffers_direct(__VA_ARGS__)

#define audio_mixer_dacs_decrease_volume

(

...

)

audio_mixer_dacs_decrease_volume_direct(__VA_ARGS__)

#define audio_mixer_dacs_flush

(

...

)

audio_mixer_dacs_flush_direct(__VA_ARGS__)

#define audio_mixer_dacs_get_volume

(

...

)

audio_mixer_dacs_get_volume_direct(__VA_ARGS__)

#define audio_mixer_dacs_increase_volume

(

...

)

audio_mixer_dacs_increase_volume_direct(__VA_ARGS__)

#define audio_mixer_dacs_input

(

...

)

audio_mixer_dacs_input_direct(__VA_ARGS__)

Referenced by adc_sample_sent_cb(), and device_audio_task().

#define audio_mixer_dacs_is_volume_muted

(

...

)

audio_mixer_dacs_is_volume_muted_direct(__VA_ARGS__)

#define audio_mixer_dacs_output

(

...

)

audio_mixer_dacs_output_direct(__VA_ARGS__)

Referenced by audio_mixer_get_buffer_direct().

#define audio_mixer_dacs_set_volume

(

...

)

audio_mixer_dacs_set_volume_direct(__VA_ARGS__)

#define audio_mixer_dacs_setup

(

...

)

audio_mixer_dacs_setup_direct(__VA_ARGS__)

#define audio_mixer_dacs_start

(

...

)

audio_mixer_dacs_start_direct(__VA_ARGS__)

Referenced by main().

#define audio_mixer_dacs_stop

(

...

)

audio_mixer_dacs_stop_direct(__VA_ARGS__)

#define audio_mixer_disable_dacs

(

...

)

audio_mixer_disable_dacs_direct(__VA_ARGS__)

#define audio_mixer_enable_dacs

(

...

)

audio_mixer_enable_dacs_direct(__VA_ARGS__)

Referenced by main().

#define audio_mixer_get_buffer

(

...

)

audio_mixer_get_buffer_direct(__VA_ARGS__)

#define audio_mixer_mute_audio

(

...

)

audio_mixer_mute_audio_direct(__VA_ARGS__)

Referenced by audio_speaker_set_mute().

void audio_mixer_close_direct

(

void

)

Close the audio_mixer.

References audio_mixer_dacs_settings.

bool audio_mixer_create_buffers_direct	(	uint8_t	nb_buffers,
		size_t	buffer_size
	)

Creates DAC buffers.

References audio_mixer_dacs_settings, buffers, and nb_buffers.

void audio_mixer_dacs_decrease_volume_direct

(

void

)

Decreases the output volume of the DACs.

Note

The DACs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, and audio_mixer_enabled_dacs_mask.

void audio_mixer_dacs_flush_direct

(

bool

force

)

Flushes the sample buffer being output to the DACs.

Parameters

force

Force flushing means do not wait until all samples have been played before flushing the DAC.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, and audio_mixer_enabled_dacs_mask.

Referenced by audio_speaker_set_sample_freq(), player_shutdown(), and usb_stream_new_sample_rate().

uint8_t audio_mixer_dacs_get_volume_direct

(

void

)

Get the average volume of the DACs.
The value returned is in the range 0; 255 where 255 corresponds to the highest volume.

Note

The DACs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_enabled_dacs_mask, and volume.

void audio_mixer_dacs_increase_volume_direct

(

void

)

Increases the output volume of the DACs.

Note

The DACs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, and audio_mixer_enabled_dacs_mask.

bool audio_mixer_dacs_input_direct	(	void *	sample_buffer,
		size_t	sample_length
	)

Inputs a sample buffer from the ADCs.

Note

The ADCs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_enabled_dacs_mask, and input.

bool audio_mixer_dacs_is_volume_muted_direct

(

void

)

Checks if the volume is muted or un-muted.
.

Note

The DACs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, and audio_mixer_enabled_dacs_mask.

bool audio_mixer_dacs_output_direct	(	void *	sample_buffer,
		size_t	sample_length
	)

Outputs a sample buffer to the DACs.

Note

The DACs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_enabled_dacs_mask, and output.

Referenced by dac_sample_sent_cb(), usb_stream_fifo_get_used_room(), and usb_stream_input().

void audio_mixer_dacs_set_volume_direct

(

uint8_t

volume

)

set the average volume of the DACs.

Note

The DACs must have been started beforehand.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, and audio_mixer_enabled_dacs_mask.

Referenced by audio_speaker_set_mute(), and audio_speaker_set_volume().

void audio_mixer_dacs_setup_direct	(	uint32_t	sample_rate_hz,
		uint8_t	num_channels,
		uint8_t	bits_per_sample,
		bool	swap_channels
	)

Sets the DACs up with new settings.

Note

The DACs must have been started beforehand.

References AUDIO_ADC_OUT_OF_SAMPLE_CB, AUDIO_ADC_RELOAD_CB, AUDIO_DAC_OUT_OF_SAMPLE_CB, AUDIO_DAC_RELOAD_CB, AUDIO_MIXER_ADC_OUT_OF_SAMPLE, AUDIO_MIXER_ADC_RELOAD_CALLBACK, audio_mixer_callback(), AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_dacs_settings, audio_mixer_enabled_dacs_mask, AUDIO_MIXER_OUT_OF_SAMPLES_CALLBACK, AUDIO_MIXER_RELOAD_CALLBACK, bits_per_sample, FPBA_HZ, num_channels, sample_rate_hz, and swap_channels.

Referenced by usb_stream_init().

void audio_mixer_dacs_start_direct	(	uint32_t	sample_rate_hz,
		uint8_t	num_channels,
		uint8_t	bits_per_sample,
		bool	swap_channels
	)

Starts the DACs.

References AUDIO_ADC_OUT_OF_SAMPLE_CB, AUDIO_ADC_RELOAD_CB, AUDIO_DAC_OUT_OF_SAMPLE_CB, AUDIO_DAC_RELOAD_CB, AUDIO_MIXER_ADC_OUT_OF_SAMPLE, AUDIO_MIXER_ADC_RELOAD_CALLBACK, audio_mixer_callback(), AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_dacs_settings, audio_mixer_enabled_dacs_mask, AUDIO_MIXER_OUT_OF_SAMPLES_CALLBACK, AUDIO_MIXER_RELOAD_CALLBACK, bits_per_sample, FPBA_HZ, num_channels, sample_rate_hz, and swap_channels.

Referenced by audio_mixer_enable_dacs_direct().

void audio_mixer_dacs_stop_direct

(

void

)

Stops the DACs.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_dacs_settings, and audio_mixer_enabled_dacs_mask.

void audio_mixer_disable_dacs_direct

(

uint32_t

dacs_mask

)

Disables the handling of the specified DACs by the audio mixer.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, audio_mixer_dacs_settings, and audio_mixer_enabled_dacs_mask.

void audio_mixer_enable_dacs_direct

(

uint32_t

dacs_mask

)

Enables the handling of the specified DACs by the audio mixer.

References audio_mixer_dacs_settings, audio_mixer_dacs_start_direct(), and audio_mixer_enabled_dacs_mask.

void* audio_mixer_get_buffer_direct

(

size_t

size

)

This functions returns a NULL pointer when no buffer are free, else returns a free temporary buffer.

References audio_mixer_dacs_output, and audio_mixer_dacs_settings.

void audio_mixer_mute_audio_direct

(

bool

mute

)

Mute Audio if True.

Parameters

mute	Set to true to mute the audio stream. Set to false otherwise.

References AUDIO_MIXER_CODEC_COUNT, AUDIO_MIXER_DACS, and audio_mixer_enabled_dacs_mask.