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https://github.com/kbeckmann/game-and-watch-retro-go.git
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134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/* MikMod sound library
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(c) 1998, 1999, 2000 Miodrag Vallat and others - see file AUTHORS for
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complete list.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA.
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*/
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/*==============================================================================
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Driver for output on n64 platform
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Originally from https://dragonminded.com/n64dev/ by DragonMinded
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Altered and updated to mikmod 3.3.11 by Victor Vieux <github@vrgl117.games>
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==============================================================================*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef DRV_N64
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#include <malloc.h>
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#include <audio.h>
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#include "mikmod_internals.h"
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static SBYTE *N64_buffer = NULL;
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static BOOL N64_IsThere(void)
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{
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return 1;
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}
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static int N64_Init(void)
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{
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/* Stereo buffer, interleaved */
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N64_buffer = (SBYTE *) MikMod_malloc(sizeof(short) * 2 * audio_get_buffer_length());
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if (!N64_buffer) return 1;
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return VC_Init();
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}
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static void N64_Exit(void)
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{
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MikMod_free(N64_buffer);
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N64_buffer = NULL;
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VC_Exit();
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}
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static void N64_Update(void)
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{
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int i;
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if (!audio_can_write()) return;
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i = audio_get_buffer_length();
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if (md_mode & DMODE_STEREO)
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{
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VC_WriteBytes(N64_buffer, i * 2 * sizeof(short));
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}
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else
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{
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VC_WriteBytes(N64_buffer, i * sizeof(short));
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for (--i; i >= 0; --i)
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{
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/* Convert mono to stereo / interleaved. */
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/* |a|b|c|d|.|.|.|.| -> |a|b|c|d|.|.|d|d| */
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/* |a|b|c|d|.|.|d|d| -> |a|b|c|d|c|c|d|d| */
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/* |a|b|c|d|c|c|d|d| -> |a|b|b|b|c|c|d|d| */
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/* |a|b|b|b|c|c|d|d| -> |a|a|b|b|c|c|d|d| */
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N64_buffer[(i * 2) + 1] = N64_buffer[i];
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N64_buffer[i * 2] = N64_buffer[i];
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}
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}
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audio_write((short *) N64_buffer);
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}
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MIKMODAPI MDRIVER drv_n64={
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NULL,
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"Nintendo 64",
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"N64 Driver v1.2",
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255,255,
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"n64",
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NULL,
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NULL,
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N64_IsThere,
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VC_SampleLoad,
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VC_SampleUnload,
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VC_SampleSpace,
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VC_SampleLength,
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N64_Init,
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N64_Exit,
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NULL,
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VC_SetNumVoices,
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VC_PlayStart,
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VC_PlayStop,
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N64_Update,
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NULL,
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VC_VoiceSetVolume,
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VC_VoiceGetVolume,
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VC_VoiceSetFrequency,
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VC_VoiceGetFrequency,
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VC_VoiceSetPanning,
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VC_VoiceGetPanning,
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VC_VoicePlay,
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VC_VoiceStop,
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VC_VoiceStopped,
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VC_VoiceGetPosition,
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VC_VoiceRealVolume
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};
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#else
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#include "mikmod_internals.h"
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MISSING(drv_n64);
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#endif
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/* ex:set ts=4: */
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