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