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/*
* Copyright (c) 2015 Andrew Kelley
*
* This file is part of libsoundio, which is MIT licensed.
* See http://opensource.org/licenses/MIT
*/
#ifndef SOUNDIO_ALSA_HPP
#define SOUNDIO_ALSA_HPP
#include "soundio_private.h"
#include "os.h"
#include "atomics.hpp"
#include "list.hpp"
#include <alsa/asoundlib.h>
int soundio_alsa_init(struct SoundIoPrivate *si);
struct SoundIoDeviceAlsa { };
#define SOUNDIO_MAX_ALSA_SND_FILE_LEN 16
struct SoundIoAlsaPendingFile {
char name[SOUNDIO_MAX_ALSA_SND_FILE_LEN];
};
struct SoundIoAlsa {
SoundIoOsMutex *mutex;
SoundIoOsCond *cond;
struct SoundIoOsThread *thread;
atomic_flag abort_flag;
int notify_fd;
int notify_wd;
bool have_devices_flag;
int notify_pipe_fd[2];
SoundIoList<SoundIoAlsaPendingFile> pending_files;
// this one is ready to be read with flush_events. protected by mutex
struct SoundIoDevicesInfo *ready_devices_info;
int shutdown_err;
bool emitted_shutdown_cb;
};
struct SoundIoOutStreamAlsa {
snd_pcm_t *handle;
snd_pcm_chmap_t *chmap;
int chmap_size;
snd_pcm_uframes_t offset;
snd_pcm_access_t access;
snd_pcm_uframes_t buffer_size_frames;
int sample_buffer_size;
char *sample_buffer;
int poll_fd_count;
struct pollfd *poll_fds;
SoundIoOsThread *thread;
atomic_flag thread_exit_flag;
int period_size;
int write_frame_count;
bool is_paused;
atomic_flag clear_buffer_flag;
SoundIoChannelArea areas[SOUNDIO_MAX_CHANNELS];
};
struct SoundIoInStreamAlsa {
snd_pcm_t *handle;
snd_pcm_chmap_t *chmap;
int chmap_size;
snd_pcm_uframes_t offset;
snd_pcm_access_t access;
int sample_buffer_size;
char *sample_buffer;
int poll_fd_count;
struct pollfd *poll_fds;
SoundIoOsThread *thread;
atomic_flag thread_exit_flag;
int period_size;
int read_frame_count;
bool is_paused;
SoundIoChannelArea areas[SOUNDIO_MAX_CHANNELS];
};
#endif
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