musix 0.3.3

Music player library for esoteric audio formats (music from C64,Amiga etc)
Documentation 
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *   Mupen64plus - ai_controller.h                                         *
 *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
 *   Copyright (C) 2014 Bobby Smiles                                       *
 *                                                                         *
 *   This program 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 Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef M64P_AI_AI_CONTROLLER_H
#define M64P_AI_AI_CONTROLLER_H

#include <stddef.h>
#include <stdint.h>

#include "osal/preproc.h"

struct r4300_core;
struct ri_controller;
struct vi_controller;

enum ai_registers
{
    AI_DRAM_ADDR_REG,
    AI_LEN_REG,
    AI_CONTROL_REG,
    AI_STATUS_REG,
    AI_DACRATE_REG,
    AI_BITRATE_REG,
    AI_REGS_COUNT
};

struct ai_dma
{
    uint32_t address;
    uint32_t length;
    unsigned int duration;
};

struct ai_controller
{
    uint32_t regs[AI_REGS_COUNT];
    struct ai_dma fifo[2];
    unsigned int samples_format_changed;

    /* external speaker output */
    void* user_data;
    void (*set_audio_format)(void*,unsigned int, unsigned int);
    void (*push_audio_samples)(void*,const void*,size_t);

    struct r4300_core* r4300;
    struct ri_controller* ri;
    struct vi_controller* vi;
};

static osal_inline uint32_t ai_reg(uint32_t address)
{
    return (address & 0xffff) >> 2;
}

/* This is for enablefifofull */
void ai_fifo_queue_int(struct ai_controller* ai);

void set_audio_format(struct ai_controller* ai, unsigned int frequency, unsigned int bits);
void push_audio_samples(struct ai_controller* ai, const void* buffer, size_t size);

void connect_ai(struct ai_controller* ai,
                struct r4300_core* r4300,
                struct ri_controller* ri,
                struct vi_controller* vi);

void init_ai(struct ai_controller* ai);

int read_ai_regs(void* opaque, uint32_t address, uint32_t* value);
int write_ai_regs(void* opaque, uint32_t address, uint32_t value, uint32_t mask);

void ai_end_of_dma_event(struct ai_controller* ai);

#endif