/* ======================================================================================== */
/* FMOD Core API - output development header file.                                          */
/* Copyright (c), Firelight Technologies Pty, Ltd. 2004-2020.                               */
/*                                                                                          */
/* Use this header if you are wanting to develop your own output plugin to use with         */
/* FMOD's output system.  With this header you can make your own output plugin that FMOD    */
/* can register and use.  See the documentation and examples on how to make a working       */
/* plugin.                                                                                  */
/*                                                                                          */
/* For more detail visit:                                                                   */
/* https://fmod.com/resources/documentation-api?version=2.0&page=plugin-api-output.html     */
/* ======================================================================================== */
#ifndef _FMOD_OUTPUT_H
#define _FMOD_OUTPUT_H

typedef struct FMOD_OUTPUT_STATE        FMOD_OUTPUT_STATE;
typedef struct FMOD_OUTPUT_OBJECT3DINFO FMOD_OUTPUT_OBJECT3DINFO;

/*
    Output constants
*/
#define FMOD_OUTPUT_PLUGIN_VERSION 4

typedef unsigned int FMOD_OUTPUT_METHOD;
#define FMOD_OUTPUT_METHOD_MIX_DIRECT    0
#define FMOD_OUTPUT_METHOD_POLLING       1
#define FMOD_OUTPUT_METHOD_MIX_BUFFERED  2

/*
    Output callbacks
*/
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_GETNUMDRIVERS_CALLBACK)    (FMOD_OUTPUT_STATE *output_state, int *numdrivers);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_GETDRIVERINFO_CALLBACK)    (FMOD_OUTPUT_STATE *output_state, int id, char *name, int namelen, FMOD_GUID *guid, int *systemrate, FMOD_SPEAKERMODE *speakermode, int *speakermodechannels);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_INIT_CALLBACK)             (FMOD_OUTPUT_STATE *output_state, int selecteddriver, FMOD_INITFLAGS flags, int *outputrate, FMOD_SPEAKERMODE *speakermode, int *speakermodechannels, FMOD_SOUND_FORMAT *outputformat, int dspbufferlength, int dspnumbuffers, void *extradriverdata);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_START_CALLBACK)            (FMOD_OUTPUT_STATE *output_state);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_STOP_CALLBACK)             (FMOD_OUTPUT_STATE *output_state);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_CLOSE_CALLBACK)            (FMOD_OUTPUT_STATE *output_state);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_UPDATE_CALLBACK)           (FMOD_OUTPUT_STATE *output_state);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_GETHANDLE_CALLBACK)        (FMOD_OUTPUT_STATE *output_state, void **handle);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_GETPOSITION_CALLBACK)      (FMOD_OUTPUT_STATE *output_state, unsigned int *pcm);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_LOCK_CALLBACK)             (FMOD_OUTPUT_STATE *output_state, unsigned int offset, unsigned int length, void **ptr1, void **ptr2, unsigned int *len1, unsigned int *len2);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_UNLOCK_CALLBACK)           (FMOD_OUTPUT_STATE *output_state, void *ptr1, void *ptr2, unsigned int len1, unsigned int len2);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_MIXER_CALLBACK)            (FMOD_OUTPUT_STATE *output_state);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_OBJECT3DGETINFO_CALLBACK)  (FMOD_OUTPUT_STATE *output_state, int *maxhardwareobjects);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_OBJECT3DALLOC_CALLBACK)    (FMOD_OUTPUT_STATE *output_state, void **object3d);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_OBJECT3DFREE_CALLBACK)     (FMOD_OUTPUT_STATE *output_state, void *object3d);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_OBJECT3DUPDATE_CALLBACK)   (FMOD_OUTPUT_STATE *output_state, void *object3d, const FMOD_OUTPUT_OBJECT3DINFO *info);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_OPENPORT_CALLBACK)         (FMOD_OUTPUT_STATE *output_state, FMOD_PORT_TYPE portType, FMOD_PORT_INDEX portIndex, int *portId, int *portRate, int *portChannels, FMOD_SOUND_FORMAT *portFormat);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_CLOSEPORT_CALLBACK)        (FMOD_OUTPUT_STATE *output_state, int portId);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_DEVICELISTCHANGED_CALLBACK)(FMOD_OUTPUT_STATE *output_state);

/*
    Output functions
*/
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_READFROMMIXER_FUNC)        (FMOD_OUTPUT_STATE *output_state, void *buffer, unsigned int length);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_COPYPORT_FUNC)             (FMOD_OUTPUT_STATE *output_state, int portId, void *buffer, unsigned int length);
typedef FMOD_RESULT (F_CALL *FMOD_OUTPUT_REQUESTRESET_FUNC)         (FMOD_OUTPUT_STATE *output_state);
typedef void *      (F_CALL *FMOD_OUTPUT_ALLOC_FUNC)                (unsigned int size, unsigned int align, const char *file, int line);
typedef void        (F_CALL *FMOD_OUTPUT_FREE_FUNC)                 (void *ptr, const char *file, int line);
typedef void        (F_CALL *FMOD_OUTPUT_LOG_FUNC)                  (FMOD_DEBUG_FLAGS level, const char *file, int line, const char *function, const char *string);

/*
    Output structures
*/
typedef struct FMOD_OUTPUT_DESCRIPTION
{
    unsigned int                            apiversion;
    const char                             *name;
    unsigned int                            version;
    FMOD_OUTPUT_METHOD                      polling; /* This will become "method" on the next major version */
    FMOD_OUTPUT_GETNUMDRIVERS_CALLBACK      getnumdrivers;
    FMOD_OUTPUT_GETDRIVERINFO_CALLBACK      getdriverinfo;
    FMOD_OUTPUT_INIT_CALLBACK               init;
    FMOD_OUTPUT_START_CALLBACK              start;
    FMOD_OUTPUT_STOP_CALLBACK               stop;
    FMOD_OUTPUT_CLOSE_CALLBACK              close;
    FMOD_OUTPUT_UPDATE_CALLBACK             update;
    FMOD_OUTPUT_GETHANDLE_CALLBACK          gethandle;
    FMOD_OUTPUT_GETPOSITION_CALLBACK        getposition;
    FMOD_OUTPUT_LOCK_CALLBACK               lock;
    FMOD_OUTPUT_UNLOCK_CALLBACK             unlock;
    FMOD_OUTPUT_MIXER_CALLBACK              mixer;
    FMOD_OUTPUT_OBJECT3DGETINFO_CALLBACK    object3dgetinfo;
    FMOD_OUTPUT_OBJECT3DALLOC_CALLBACK      object3dalloc;
    FMOD_OUTPUT_OBJECT3DFREE_CALLBACK       object3dfree;
    FMOD_OUTPUT_OBJECT3DUPDATE_CALLBACK     object3dupdate;
    FMOD_OUTPUT_OPENPORT_CALLBACK           openport;
    FMOD_OUTPUT_CLOSEPORT_CALLBACK          closeport;
    FMOD_OUTPUT_DEVICELISTCHANGED_CALLBACK  devicelistchanged;
} FMOD_OUTPUT_DESCRIPTION;

struct FMOD_OUTPUT_STATE
{
    void                            *plugindata;
    FMOD_OUTPUT_READFROMMIXER_FUNC   readfrommixer;
    FMOD_OUTPUT_ALLOC_FUNC           alloc;
    FMOD_OUTPUT_FREE_FUNC            free;
    FMOD_OUTPUT_LOG_FUNC             log;
    FMOD_OUTPUT_COPYPORT_FUNC        copyport;
    FMOD_OUTPUT_REQUESTRESET_FUNC    requestreset;
};

struct FMOD_OUTPUT_OBJECT3DINFO
{
    float          *buffer;
    unsigned int    bufferlength;
    FMOD_VECTOR     position;
    float           gain;
    float           spread;
    float           priority;
};

/*
    Output macros
*/
#define FMOD_OUTPUT_READFROMMIXER(_state, _buffer, _length) \
    (_state)->readfrommixer(_state, _buffer, _length)
#define FMOD_OUTPUT_ALLOC(_state, _size, _align) \
    (_state)->alloc(_size, _align, __FILE__, __LINE__)
#define FMOD_OUTPUT_FREE(_state, _ptr) \
    (_state)->free(_ptr, __FILE__, __LINE__)
#define FMOD_OUTPUT_LOG(_state, _level, _location, _format, ...) \
    (_state)->log(_level, __FILE__, __LINE__, _location, _format, __VA_ARGS__)
#define FMOD_OUTPUT_COPYPORT(_state, _id, _buffer, _length) \
    (_state)->copyport(_state, _id, _buffer, _length)
#define FMOD_OUTPUT_REQUESTRESET(_state) \
    (_state)->requestreset(_state)

#endif /* _FMOD_OUTPUT_H */