looking-glass/client/include/interface/audiodev.h
2024-02-01 17:16:31 +11:00

89 lines
2.6 KiB
C

/**
* Looking Glass
* Copyright © 2017-2024 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_I_AUDIODEV_
#define _H_I_AUDIODEV_
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
typedef int (*LG_AudioPullFn)(uint8_t * dst, int frames);
typedef void (*LG_AudioPushFn)(uint8_t * src, int frames);
struct LG_AudioDevOps
{
/* internal name of the audio for debugging */
const char * name;
/* called very early to allow for option registration, optional */
void (*earlyInit)(void);
/* called to initialize the audio backend */
bool (*init)(void);
/* final free */
void (*free)(void);
struct
{
/* setup the stream for playback but don't start it yet
* Note: the pull function returns f32 samples
*/
void (*setup)(int channels, int sampleRate, int requestedPeriodFrames,
int * maxPeriodFrames, int * startFrames, LG_AudioPullFn pullFn);
/* called when there is data available to start playback */
void (*start)(void);
/* called when SPICE reports the audio stream has stopped */
void (*stop)(void);
/* [optional] called to set the volume of the channels */
void (*volume)(int channels, const uint16_t volume[]);
/* [optional] called to set muting of the output */
void (*mute)(bool mute);
/* return the current total playback latency in microseconds */
uint64_t (*latency)(void);
}
playback;
struct
{
/* start the record stream
* Note: currently SPICE only supports S16 samples so always assume so
*/
void (*start)(int channels, int sampleRate, LG_AudioPushFn pushFn);
/* called when SPICE reports the audio stream has stopped */
void (*stop)(void);
/* [optional] called to set the volume of the channels */
void (*volume)(int channels, const uint16_t volume[]);
/* [optional] called to set muting of the input */
void (*mute)(bool mute);
}
record;
};
#endif