audio_output_alsa.c File Reference

ALSA audio output driver. More...

#include "stdinc.h"
#include <alsa/asoundlib.h>
#include "audio_file.h"
#include "audio_output.h"
#include "config.h"

Include dependency graph for audio_output_alsa.c:

This graph shows which files directly or indirectly include this file:

Functions
static int	audio_output_apply_hwparams (void)
	Alter the audio output parameters of the audio output device.
static void	audio_output_volume_open (void)
	Open the ALSA mixer device, making it possible to adjust the volume.
int	audio_output_open (void)
	Open the sound device for audio output.
int	audio_output_play (struct audio_file *fd)
	Write data to the sound device.
void	audio_output_close (void)
	Close the sound device.
static int	audio_output_volume_adjust (int n)
	Adjust the audio output by a certain percentage and return the new value.
int	audio_output_volume_up (void)
	Increment the volume and return the new value in percent.
int	audio_output_volume_down (void)
	Decrement the volume and return the new value in percent.
Variables
static snd_pcm_t *	devhnd
	Handle to the audio device obtained from ALSA.
static unsigned int	channels = 0
	the amount of channels that is currently used for playback.
static unsigned int	srate = 0
	the sample rate that is currently used for playback.
static snd_mixer_t *	mixhnd = NULL
	Handle to the ALSA mixer.
static snd_mixer_elem_t *	elem
	ALSA mixer element for the audio device.

Detailed Description

ALSA audio output driver.

Definition in file audio_output_alsa.c.