soundio.h

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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_SOUNDIO_H
#define SOUNDIO_SOUNDIO_H

#include "endian.h"
#include <stdbool.h>

#ifdef __cplusplus
#define SOUNDIO_EXTERN_C extern "C"
#else
#define SOUNDIO_EXTERN_C
#endif

#if defined(SOUNDIO_STATIC_LIBRARY)
# define SOUNDIO_EXPORT SOUNDIO_EXTERN_C
#else
# if defined(_WIN32)
#  if defined(SOUNDIO_BUILDING_LIBRARY)
#   define SOUNDIO_EXPORT SOUNDIO_EXTERN_C __declspec(dllexport)
#  else
#   define SOUNDIO_EXPORT SOUNDIO_EXTERN_C __declspec(dllimport)
#  endif
# else
#  define SOUNDIO_EXPORT SOUNDIO_EXTERN_C __attribute__((visibility ("default")))
# endif
#endif

enum SoundIoError {
    SoundIoErrorNone,
    SoundIoErrorNoMem,
    SoundIoErrorInitAudioBackend,
    SoundIoErrorSystemResources,
    SoundIoErrorOpeningDevice,
    SoundIoErrorNoSuchDevice,
    SoundIoErrorInvalid,
    SoundIoErrorBackendUnavailable,
    SoundIoErrorStreaming,
    SoundIoErrorIncompatibleDevice,
    SoundIoErrorNoSuchClient,
    SoundIoErrorIncompatibleBackend,
    SoundIoErrorBackendDisconnected,
    SoundIoErrorInterrupted,
    SoundIoErrorUnderflow,
    SoundIoErrorEncodingString,
};

enum SoundIoChannelId {
    SoundIoChannelIdInvalid,

    SoundIoChannelIdFrontLeft, 
    SoundIoChannelIdFrontRight,
    SoundIoChannelIdFrontCenter,
    SoundIoChannelIdLfe,
    SoundIoChannelIdBackLeft,
    SoundIoChannelIdBackRight,
    SoundIoChannelIdFrontLeftCenter,
    SoundIoChannelIdFrontRightCenter,
    SoundIoChannelIdBackCenter,
    SoundIoChannelIdSideLeft,
    SoundIoChannelIdSideRight,
    SoundIoChannelIdTopCenter,
    SoundIoChannelIdTopFrontLeft,
    SoundIoChannelIdTopFrontCenter,
    SoundIoChannelIdTopFrontRight,
    SoundIoChannelIdTopBackLeft,
    SoundIoChannelIdTopBackCenter,
    SoundIoChannelIdTopBackRight, 

    SoundIoChannelIdBackLeftCenter, 
    SoundIoChannelIdBackRightCenter,
    SoundIoChannelIdFrontLeftWide,
    SoundIoChannelIdFrontRightWide,
    SoundIoChannelIdFrontLeftHigh,
    SoundIoChannelIdFrontCenterHigh,
    SoundIoChannelIdFrontRightHigh,
    SoundIoChannelIdTopFrontLeftCenter,
    SoundIoChannelIdTopFrontRightCenter,
    SoundIoChannelIdTopSideLeft,
    SoundIoChannelIdTopSideRight,
    SoundIoChannelIdLeftLfe,
    SoundIoChannelIdRightLfe,
    SoundIoChannelIdLfe2,
    SoundIoChannelIdBottomCenter,
    SoundIoChannelIdBottomLeftCenter,
    SoundIoChannelIdBottomRightCenter,

    SoundIoChannelIdMsMid,
    SoundIoChannelIdMsSide,

    SoundIoChannelIdAmbisonicW,
    SoundIoChannelIdAmbisonicX,
    SoundIoChannelIdAmbisonicY,
    SoundIoChannelIdAmbisonicZ,

    SoundIoChannelIdXyX,
    SoundIoChannelIdXyY,

    SoundIoChannelIdHeadphonesLeft, 
    SoundIoChannelIdHeadphonesRight,
    SoundIoChannelIdClickTrack,
    SoundIoChannelIdForeignLanguage,
    SoundIoChannelIdHearingImpaired,
    SoundIoChannelIdNarration,
    SoundIoChannelIdHaptic,
    SoundIoChannelIdDialogCentricMix, 

    SoundIoChannelIdAux,
    SoundIoChannelIdAux0,
    SoundIoChannelIdAux1,
    SoundIoChannelIdAux2,
    SoundIoChannelIdAux3,
    SoundIoChannelIdAux4,
    SoundIoChannelIdAux5,
    SoundIoChannelIdAux6,
    SoundIoChannelIdAux7,
    SoundIoChannelIdAux8,
    SoundIoChannelIdAux9,
    SoundIoChannelIdAux10,
    SoundIoChannelIdAux11,
    SoundIoChannelIdAux12,
    SoundIoChannelIdAux13,
    SoundIoChannelIdAux14,
    SoundIoChannelIdAux15,
};

enum SoundIoChannelLayoutId {
    SoundIoChannelLayoutIdMono,
    SoundIoChannelLayoutIdStereo,
    SoundIoChannelLayoutId2Point1,
    SoundIoChannelLayoutId3Point0,
    SoundIoChannelLayoutId3Point0Back,
    SoundIoChannelLayoutId3Point1,
    SoundIoChannelLayoutId4Point0,
    SoundIoChannelLayoutIdQuad,
    SoundIoChannelLayoutIdQuadSide,
    SoundIoChannelLayoutId4Point1,
    SoundIoChannelLayoutId5Point0Back,
    SoundIoChannelLayoutId5Point0Side,
    SoundIoChannelLayoutId5Point1,
    SoundIoChannelLayoutId5Point1Back,
    SoundIoChannelLayoutId6Point0Side,
    SoundIoChannelLayoutId6Point0Front,
    SoundIoChannelLayoutIdHexagonal,
    SoundIoChannelLayoutId6Point1,
    SoundIoChannelLayoutId6Point1Back,
    SoundIoChannelLayoutId6Point1Front,
    SoundIoChannelLayoutId7Point0,
    SoundIoChannelLayoutId7Point0Front,
    SoundIoChannelLayoutId7Point1,
    SoundIoChannelLayoutId7Point1Wide,
    SoundIoChannelLayoutId7Point1WideBack,
    SoundIoChannelLayoutIdOctagonal,
};

enum SoundIoBackend {
    SoundIoBackendNone,
    SoundIoBackendJack,
    SoundIoBackendPulseAudio,
    SoundIoBackendAlsa,
    SoundIoBackendCoreAudio,
    SoundIoBackendWasapi,
    SoundIoBackendDummy,
};

enum SoundIoDeviceAim {
    SoundIoDeviceAimInput,  
    SoundIoDeviceAimOutput, 
};

enum SoundIoFormat {
    SoundIoFormatInvalid,
    SoundIoFormatS8,        
    SoundIoFormatU8,        
    SoundIoFormatS16LE,     
    SoundIoFormatS16BE,     
    SoundIoFormatU16LE,     
    SoundIoFormatU16BE,     
    SoundIoFormatS24LE,     
    SoundIoFormatS24BE,     
    SoundIoFormatU24LE,     
    SoundIoFormatU24BE,     
    SoundIoFormatS32LE,     
    SoundIoFormatS32BE,     
    SoundIoFormatU32LE,     
    SoundIoFormatU32BE,     
    SoundIoFormatFloat32LE, 
    SoundIoFormatFloat32BE, 
    SoundIoFormatFloat64LE, 
    SoundIoFormatFloat64BE, 
};

#if defined(SOUNDIO_OS_BIG_ENDIAN)
#define SoundIoFormatS16NE SoundIoFormatS16BE
#define SoundIoFormatU16NE SoundIoFormatU16BE
#define SoundIoFormatS24NE SoundIoFormatS24BE
#define SoundIoFormatU24NE SoundIoFormatU24BE
#define SoundIoFormatS32NE SoundIoFormatS32BE
#define SoundIoFormatU32NE SoundIoFormatU32BE
#define SoundIoFormatFloat32NE SoundIoFormatFloat32BE
#define SoundIoFormatFloat64NE SoundIoFormatFloat64BE

#define SoundIoFormatS16FE SoundIoFormatS16LE
#define SoundIoFormatU16FE SoundIoFormatU16LE
#define SoundIoFormatS24FE SoundIoFormatS24LE
#define SoundIoFormatU24FE SoundIoFormatU24LE
#define SoundIoFormatS32FE SoundIoFormatS32LE
#define SoundIoFormatU32FE SoundIoFormatU32LE
#define SoundIoFormatFloat32FE SoundIoFormatFloat32LE
#define SoundIoFormatFloat64FE SoundIoFormatFloat64LE

#elif defined(SOUNDIO_OS_LITTLE_ENDIAN)

#define SoundIoFormatS16NE SoundIoFormatS16LE
#define SoundIoFormatU16NE SoundIoFormatU16LE
#define SoundIoFormatS24NE SoundIoFormatS24LE
#define SoundIoFormatU24NE SoundIoFormatU24LE
#define SoundIoFormatS32NE SoundIoFormatS32LE
#define SoundIoFormatU32NE SoundIoFormatU32LE
#define SoundIoFormatFloat32NE SoundIoFormatFloat32LE
#define SoundIoFormatFloat64NE SoundIoFormatFloat64LE

#define SoundIoFormatS16FE SoundIoFormatS16BE
#define SoundIoFormatU16FE SoundIoFormatU16BE
#define SoundIoFormatS24FE SoundIoFormatS24BE
#define SoundIoFormatU24FE SoundIoFormatU24BE
#define SoundIoFormatS32FE SoundIoFormatS32BE
#define SoundIoFormatU32FE SoundIoFormatU32BE
#define SoundIoFormatFloat32FE SoundIoFormatFloat32BE
#define SoundIoFormatFloat64FE SoundIoFormatFloat64BE

#else
#error unknown byte order
#endif

#define SOUNDIO_MAX_CHANNELS 24
struct SoundIoChannelLayout {
    const char *name;
    int channel_count;
    enum SoundIoChannelId channels[SOUNDIO_MAX_CHANNELS];
};

struct SoundIoSampleRateRange {
    int min;
    int max;
};

struct SoundIoChannelArea {
    char *ptr;
    int step;
};

struct SoundIo {
    void *userdata;
    void (*on_devices_change)(struct SoundIo *);
    void (*on_backend_disconnect)(struct SoundIo *, int err);
    void (*on_events_signal)(struct SoundIo *);

    enum SoundIoBackend current_backend;

    const char *app_name;

    void (*emit_rtprio_warning)(void);

    void (*jack_info_callback)(const char *msg);
    void (*jack_error_callback)(const char *msg);
};

struct SoundIoDevice {
    struct SoundIo *soundio;

    char *id;
    char *name;

    enum SoundIoDeviceAim aim;

    struct SoundIoChannelLayout *layouts;
    int layout_count;
    struct SoundIoChannelLayout current_layout;

    enum SoundIoFormat *formats;
    int format_count;
    enum SoundIoFormat current_format;

    struct SoundIoSampleRateRange *sample_rates;
    int sample_rate_count;
    int sample_rate_current;

    double software_latency_min;
    double software_latency_max;
    double software_latency_current;

    bool is_raw;

    int ref_count;

    int probe_error;
};

struct SoundIoOutStream {
    struct SoundIoDevice *device;

    enum SoundIoFormat format;

    int sample_rate;

    struct SoundIoChannelLayout layout;

    double software_latency;

    void *userdata;
    void (*write_callback)(struct SoundIoOutStream *,
            int frame_count_min, int frame_count_max);
    void (*underflow_callback)(struct SoundIoOutStream *);
    void (*error_callback)(struct SoundIoOutStream *, int err);

    const char *name;

    bool non_terminal_hint;


    int bytes_per_frame;
    int bytes_per_sample;

    int layout_error;
};

struct SoundIoInStream {
    struct SoundIoDevice *device;

    enum SoundIoFormat format;

    int sample_rate;

    struct SoundIoChannelLayout layout;

    double software_latency;

    void *userdata;
    void (*read_callback)(struct SoundIoInStream *, int frame_count_min, int frame_count_max);
    void (*overflow_callback)(struct SoundIoInStream *);
    void (*error_callback)(struct SoundIoInStream *, int err);

    const char *name;

    bool non_terminal_hint;

    int bytes_per_frame;
    int bytes_per_sample;

    int layout_error;
};

SOUNDIO_EXPORT const char *soundio_version_string(void);
SOUNDIO_EXPORT int soundio_version_major(void);
SOUNDIO_EXPORT int soundio_version_minor(void);
SOUNDIO_EXPORT int soundio_version_patch(void);

SOUNDIO_EXPORT struct SoundIo *soundio_create(void);
SOUNDIO_EXPORT void soundio_destroy(struct SoundIo *soundio);


SOUNDIO_EXPORT int soundio_connect(struct SoundIo *soundio);
SOUNDIO_EXPORT int soundio_connect_backend(struct SoundIo *soundio, enum SoundIoBackend backend);
SOUNDIO_EXPORT void soundio_disconnect(struct SoundIo *soundio);

SOUNDIO_EXPORT const char *soundio_strerror(int error);
SOUNDIO_EXPORT const char *soundio_backend_name(enum SoundIoBackend backend);

SOUNDIO_EXPORT int soundio_backend_count(struct SoundIo *soundio);
SOUNDIO_EXPORT enum SoundIoBackend soundio_get_backend(struct SoundIo *soundio, int index);

SOUNDIO_EXPORT bool soundio_have_backend(enum SoundIoBackend backend);

SOUNDIO_EXPORT void soundio_flush_events(struct SoundIo *soundio);

SOUNDIO_EXPORT void soundio_wait_events(struct SoundIo *soundio);

SOUNDIO_EXPORT void soundio_wakeup(struct SoundIo *soundio);


SOUNDIO_EXPORT void soundio_force_device_scan(struct SoundIo *soundio);


// Channel Layouts

SOUNDIO_EXPORT bool soundio_channel_layout_equal(
        const struct SoundIoChannelLayout *a,
        const struct SoundIoChannelLayout *b);

SOUNDIO_EXPORT const char *soundio_get_channel_name(enum SoundIoChannelId id);
SOUNDIO_EXPORT enum SoundIoChannelId soundio_parse_channel_id(const char *str, int str_len);

SOUNDIO_EXPORT int soundio_channel_layout_builtin_count(void);
SOUNDIO_EXPORT const struct SoundIoChannelLayout *soundio_channel_layout_get_builtin(int index);

SOUNDIO_EXPORT const struct SoundIoChannelLayout *soundio_channel_layout_get_default(int channel_count);

SOUNDIO_EXPORT int soundio_channel_layout_find_channel(
        const struct SoundIoChannelLayout *layout, enum SoundIoChannelId channel);

SOUNDIO_EXPORT bool soundio_channel_layout_detect_builtin(struct SoundIoChannelLayout *layout);

SOUNDIO_EXPORT const struct SoundIoChannelLayout *soundio_best_matching_channel_layout(
        const struct SoundIoChannelLayout *preferred_layouts, int preferred_layout_count,
        const struct SoundIoChannelLayout *available_layouts, int available_layout_count);

SOUNDIO_EXPORT void soundio_sort_channel_layouts(struct SoundIoChannelLayout *layouts, int layout_count);


// Sample Formats

SOUNDIO_EXPORT int soundio_get_bytes_per_sample(enum SoundIoFormat format);

static inline int soundio_get_bytes_per_frame(enum SoundIoFormat format, int channel_count) {
    return soundio_get_bytes_per_sample(format) * channel_count;
}

static inline int soundio_get_bytes_per_second(enum SoundIoFormat format,
        int channel_count, int sample_rate)
{
    return soundio_get_bytes_per_frame(format, channel_count) * sample_rate;
}

SOUNDIO_EXPORT const char * soundio_format_string(enum SoundIoFormat format);




// Devices


SOUNDIO_EXPORT int soundio_input_device_count(struct SoundIo *soundio);
SOUNDIO_EXPORT int soundio_output_device_count(struct SoundIo *soundio);

SOUNDIO_EXPORT struct SoundIoDevice *soundio_get_input_device(struct SoundIo *soundio, int index);
SOUNDIO_EXPORT struct SoundIoDevice *soundio_get_output_device(struct SoundIo *soundio, int index);

SOUNDIO_EXPORT int soundio_default_input_device_index(struct SoundIo *soundio);

SOUNDIO_EXPORT int soundio_default_output_device_index(struct SoundIo *soundio);

SOUNDIO_EXPORT void soundio_device_ref(struct SoundIoDevice *device);
SOUNDIO_EXPORT void soundio_device_unref(struct SoundIoDevice *device);

SOUNDIO_EXPORT bool soundio_device_equal(
        const struct SoundIoDevice *a,
        const struct SoundIoDevice *b);

SOUNDIO_EXPORT void soundio_device_sort_channel_layouts(struct SoundIoDevice *device);

SOUNDIO_EXPORT bool soundio_device_supports_format(struct SoundIoDevice *device,
        enum SoundIoFormat format);

SOUNDIO_EXPORT bool soundio_device_supports_layout(struct SoundIoDevice *device,
        const struct SoundIoChannelLayout *layout);

SOUNDIO_EXPORT bool soundio_device_supports_sample_rate(struct SoundIoDevice *device,
        int sample_rate);

SOUNDIO_EXPORT int soundio_device_nearest_sample_rate(struct SoundIoDevice *device,
        int sample_rate);



// Output Streams
SOUNDIO_EXPORT struct SoundIoOutStream *soundio_outstream_create(struct SoundIoDevice *device);
SOUNDIO_EXPORT void soundio_outstream_destroy(struct SoundIoOutStream *outstream);

SOUNDIO_EXPORT int soundio_outstream_open(struct SoundIoOutStream *outstream);

SOUNDIO_EXPORT int soundio_outstream_start(struct SoundIoOutStream *outstream);

SOUNDIO_EXPORT int soundio_outstream_begin_write(struct SoundIoOutStream *outstream,
        struct SoundIoChannelArea **areas, int *frame_count);

SOUNDIO_EXPORT int soundio_outstream_end_write(struct SoundIoOutStream *outstream);

SOUNDIO_EXPORT int soundio_outstream_clear_buffer(struct SoundIoOutStream *outstream);

SOUNDIO_EXPORT int soundio_outstream_pause(struct SoundIoOutStream *outstream, bool pause);

SOUNDIO_EXPORT int soundio_outstream_get_latency(struct SoundIoOutStream *outstream,
        double *out_latency);



// Input Streams
SOUNDIO_EXPORT struct SoundIoInStream *soundio_instream_create(struct SoundIoDevice *device);
SOUNDIO_EXPORT void soundio_instream_destroy(struct SoundIoInStream *instream);

SOUNDIO_EXPORT int soundio_instream_open(struct SoundIoInStream *instream);

SOUNDIO_EXPORT int soundio_instream_start(struct SoundIoInStream *instream);

SOUNDIO_EXPORT int soundio_instream_begin_read(struct SoundIoInStream *instream,
        struct SoundIoChannelArea **areas, int *frame_count);
SOUNDIO_EXPORT int soundio_instream_end_read(struct SoundIoInStream *instream);

SOUNDIO_EXPORT int soundio_instream_pause(struct SoundIoInStream *instream, bool pause);

SOUNDIO_EXPORT int soundio_instream_get_latency(struct SoundIoInStream *instream,
        double *out_latency);


struct SoundIoRingBuffer;
SOUNDIO_EXPORT struct SoundIoRingBuffer *soundio_ring_buffer_create(struct SoundIo *soundio, int requested_capacity);
SOUNDIO_EXPORT void soundio_ring_buffer_destroy(struct SoundIoRingBuffer *ring_buffer);

SOUNDIO_EXPORT int soundio_ring_buffer_capacity(struct SoundIoRingBuffer *ring_buffer);

SOUNDIO_EXPORT char *soundio_ring_buffer_write_ptr(struct SoundIoRingBuffer *ring_buffer);
SOUNDIO_EXPORT void soundio_ring_buffer_advance_write_ptr(struct SoundIoRingBuffer *ring_buffer, int count);

SOUNDIO_EXPORT char *soundio_ring_buffer_read_ptr(struct SoundIoRingBuffer *ring_buffer);
SOUNDIO_EXPORT void soundio_ring_buffer_advance_read_ptr(struct SoundIoRingBuffer *ring_buffer, int count);

SOUNDIO_EXPORT int soundio_ring_buffer_fill_count(struct SoundIoRingBuffer *ring_buffer);

SOUNDIO_EXPORT int soundio_ring_buffer_free_count(struct SoundIoRingBuffer *ring_buffer);

SOUNDIO_EXPORT void soundio_ring_buffer_clear(struct SoundIoRingBuffer *ring_buffer);

#endif