/**********************************************************************************************
*
*   raylib.audio
*
*   Basic functions to manage Audio: InitAudioDevice, LoadAudioFiles, PlayAudioFiles
*
*   Uses external lib:
*       OpenAL Soft - Audio device management lib (http://kcat.strangesoft.net/openal.html)
*       stb_vorbis - Ogg audio files loading (http://www.nothings.org/stb_vorbis/)
*
*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
*
*   This software is provided "as-is", without any express or implied warranty. In no event
*   will the authors be held liable for any damages arising from the use of this software.
*
*   Permission is granted to anyone to use this software for any purpose, including commercial
*   applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
*     1. The origin of this software must not be misrepresented; you must not claim that you
*     wrote the original software. If you use this software in a product, an acknowledgment
*     in the product documentation would be appreciated but is not required.
*
*     2. Altered source versions must be plainly marked as such, and must not be misrepresented
*     as being the original software.
*
*     3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/

#ifndef AUDIO_H
#define AUDIO_H

//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
//...

//----------------------------------------------------------------------------------
// Types and Structures Definition
// NOTE: Below types are required for CAMERA_STANDALONE usage
//----------------------------------------------------------------------------------
#ifndef __cplusplus
// Boolean type
    #if !defined(_STDBOOL_H)
        typedef enum { false, true } bool;
        #define _STDBOOL_H
    #endif
#endif

typedef enum {
    ERROR_RAW_CONTEXT_CREATION = 1,
    ERROR_XM_CONTEXT_CREATION = 2,
    ERROR_MOD_CONTEXT_CREATION = 4,
    ERROR_MIX_CHANNEL_CREATION = 8,
    ERROR_MUSIC_CHANNEL_CREATION = 16,
    ERROR_LOADING_XM = 32,
    ERROR_LOADING_MOD = 64,
    ERROR_LOADING_WAV = 128,
    ERROR_LOADING_OGG = 256,
    ERROR_OUT_OF_MIX_CHANNELS = 512,
    ERROR_EXTENSION_NOT_RECOGNIZED = 1024,
    ERROR_UNABLE_TO_OPEN_RRES_FILE = 2048,
    ERROR_INVALID_RRES_FILE = 4096,
    ERROR_INVALID_RRES_RESOURCE = 8192,
    ERROR_UNINITIALIZED_CHANNELS = 16384
} AudioError;

// Sound source type
typedef struct Sound {
    unsigned int source;
    unsigned int buffer;
    AudioError error; // if there was any error during the creation or use of this Sound
} Sound;

// Wave type, defines audio wave data
typedef struct Wave {
    void *data;                 // Buffer data pointer
    unsigned int dataSize;      // Data size in bytes
    unsigned int sampleRate;
    short bitsPerSample;
    short channels;
} Wave;

typedef int RawAudioContext;


#ifdef __cplusplus
extern "C" {            // Prevents name mangling of functions
#endif

//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
//...

//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void InitAudioDevice(void);                                     // Initialize audio device and context
void CloseAudioDevice(void);                                    // Close the audio device and context (and music stream)
bool IsAudioDeviceReady(void);                                  // True if call to InitAudioDevice() was successful and CloseAudioDevice() has not been called yet

Sound LoadSound(char *fileName);                                // Load sound to memory
Sound LoadSoundFromWave(Wave wave);                             // Load sound to memory from wave data
Sound LoadSoundFromRES(const char *rresName, int resId);        // Load sound to memory from rRES file (raylib Resource)
void UnloadSound(Sound sound);                                  // Unload sound
void PlaySound(Sound sound);                                    // Play a sound
void PauseSound(Sound sound);                                   // Pause a sound
void StopSound(Sound sound);                                    // Stop playing a sound
bool IsSoundPlaying(Sound sound);                               // Check if a sound is currently playing
void SetSoundVolume(Sound sound, float volume);                 // Set volume for a sound (1.0 is max level)
void SetSoundPitch(Sound sound, float pitch);                   // Set pitch for a sound (1.0 is base level)

int PlayMusicStream(int musicIndex, char *fileName);            // Start music playing (open stream)
void UpdateMusicStream(int index);                              // Updates buffers for music streaming
void StopMusicStream(int index);                                // Stop music playing (close stream)
void PauseMusicStream(int index);                               // Pause music playing
void ResumeMusicStream(int index);                              // Resume playing paused music
bool IsMusicPlaying(int index);                                 // Check if music is playing
void SetMusicVolume(int index, float volume);                   // Set volume for music (1.0 is max level)
float GetMusicTimeLength(int index);                            // Get music time length (in seconds)
float GetMusicTimePlayed(int index);                            // Get current music time played (in seconds)
int getMusicStreamCount(void);
void SetMusicPitch(int index, float pitch);

// used to output raw audio streams, returns negative numbers on error
// if floating point is false the data size is 16bit short, otherwise it is float 32bit
RawAudioContext InitRawAudioContext(int sampleRate, int channels, bool floatingPoint);

void CloseRawAudioContext(RawAudioContext ctx);
int BufferRawAudioContext(RawAudioContext ctx, void *data, unsigned short numberElements); // returns number of elements buffered

#ifdef __cplusplus
}
#endif

#endif // AUDIO_H