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/*
* PCem - IBM PC emulator
*
* 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.
*/
/*
* Portions:
* VMusic - a VirtualBox extension pack with various music devices
* Copyright (C) 2022 Javier S. Pedro
*
* 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 EMU8K_H
#define EMU8K_H
#include <stddef.h>
#include <stdint.h>
#include <VBox/vmm/ssm.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct emu8k_t emu8k_t;
emu8k_t* emu8k_alloc(void *rom, void *ram, size_t ram_size);
void emu8k_free(emu8k_t *emu8k);
void emu8k_reset(emu8k_t *emu8k);
uint16_t emu8k_inw(emu8k_t *emu8k, uint16_t addr);
void emu8k_outw(emu8k_t *emu8k, uint16_t addr, uint16_t val);
uint8_t emu8k_inb(emu8k_t *emu8k, uint16_t addr);
void emu8k_outb(emu8k_t *emu8k, uint16_t addr, uint8_t val);
void emu8k_render(emu8k_t *emu8k, int16_t *buf, size_t frames);
/** Between calls to emu8k_render, the virtual sample count is used to keep the "sample count" register ticking at a reasonable pace. */
void emu8k_update_virtual_sample_count(emu8k_t *emu8k, uint16_t sample_count);
/* Many programs seem to rely in this counter incrementing frequently, and may hang/error out if it doesn't.
* It is reset to 0 whenever we render and therefore increment the real sample count.
* This means that effectively the sample count register may readjust itself (go back or jump ahead) on _render :(. */
extern const struct SSMFIELD g_emu8k_fields[];
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif // EMU8K_H
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