/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2016 - Daniel De Matteis
 *  Copyright (C) 2012-2015 - Michael Lelli
 *
 *  RetroArch is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _RETRO_IMPLEMENTATION_V1_H
#define _RETRO_IMPLEMENTATION_V1_H

#ifdef __cplusplus
extern "C" {
#endif

#include "libretro.h"

enum
{
   /* Polling is performed before call to retro_run */
   POLL_TYPE_EARLY = 0,
   /* Polling is performed when requested. */
   POLL_TYPE_NORMAL,
   /* Polling is performed on first call to 
    * retro_input_state per frame. */
   POLL_TYPE_LATE
};

typedef struct retro_callbacks
{
   retro_video_refresh_t frame_cb;
   retro_audio_sample_t sample_cb;
   retro_audio_sample_batch_t sample_batch_cb;
   retro_input_state_t state_cb;
   retro_input_poll_t poll_cb;
} retro_callbacks_t;

extern retro_callbacks_t retro_ctx;

/**
 * retro_init_libretro_cbs:
 * @data           : pointer to retro_callbacks object
 *
 * Initializes libretro callbacks, and binds the libretro callbacks 
 * to default callback functions.
 **/
void retro_init_libretro_cbs(void *data);

/**
 * retro_set_default_callbacks:
 * @data           : pointer to retro_callbacks object
 *
 * Binds the libretro callbacks to default callback functions.
 **/
void retro_set_default_callbacks(void *data);

/**
 * retro_set_rewind_callbacks:
 *
 * Sets the audio sampling callbacks based on whether or not
 * rewinding is currently activated.
 **/
void retro_set_rewind_callbacks(void);

/* Runs the core for one frame. Use instead of core.retro_run(). */
void retro_run_core(void);

/**
 * retro_flush_audio:
 * @data                 : pointer to audio buffer.
 * @samples              : amount of samples to write.
 *
 * Writes audio samples to audio driver. Will first
 * perform DSP processing (if enabled) and resampling.
 *
 * driver.audio_active will be set to false (0) in case
 * of an error, otherwise will be set to true (1).
 *
 * Returns: true (1) on success, otherwise false (0).
 **/
bool retro_flush_audio(const int16_t *data, size_t samples);

void retro_uninit_libretro_cbs(void);

#ifdef __cplusplus
}
#endif

#endif