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/*
Copyright (C) 2020 dec05eba
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 3 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, see <https://www.gnu.org/licenses/>.
*/
#ifndef GSR_SOUND_H
#define GSR_SOUND_H
#include <stdbool.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
void *handle;
unsigned int frames;
} SoundDevice;
typedef struct {
char name[256];
char description[256];
} gsr_audio_device;
typedef struct {
char default_output[256];
char default_input[256];
gsr_audio_device *items;
size_t num_items;
size_t capacity_items;
} gsr_audio_devices;
typedef enum {
GSR_AUDIO_FORMAT_S16,
GSR_AUDIO_FORMAT_S32,
GSR_AUDIO_FORMAT_F32
} gsr_audio_format;
/*
Get a sound device by name, returning the device into the |device| parameter.
|device_name| can be a device name or "default_output", "default_input" or "" to not connect to any device (used for app audio for example).
If the device name is "default_output" or "default_input" then it will automatically switch which
device is records from when the default output/input is changed in the system audio settings.
Returns 0 on success, or a negative value on failure.
*/
int sound_device_get_by_name(SoundDevice *device, const char *node_name, const char *device_name, const char *description, unsigned int num_channels, unsigned int period_frame_size, gsr_audio_format audio_format);
void sound_device_close(SoundDevice *device);
/*
Discards the audio that has been captured so far.
Call this before the first call to sound_device_read_next_chunk to not get audio that was captured before that point,
since the sound device can be created a while before audio capture starts.
*/
void sound_device_flush(SoundDevice *device);
/*
Returns the next chunk of audio into @buffer.
Returns the number of frames read, or a negative value on failure.
*/
int sound_device_read_next_chunk(SoundDevice *device, void **buffer, double timeout_sec, double *latency_seconds);
void get_pulseaudio_inputs(gsr_audio_devices *audio_devices);
void gsr_audio_devices_deinit(gsr_audio_devices *self);
bool pulseaudio_server_is_pipewire(void);
#ifdef __cplusplus
}
#endif
#endif /* GSR_SOUND_H */
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