1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23 #include "SDL_stdinc.h"
24
25 #include "soundcommon.h"
26
SoundSystemInit(u32 rate,u32 buffersize,u8 channel,u8 format)27 void SoundSystemInit(u32 rate,u32 buffersize,u8 channel,u8 format)
28 {
29 soundsystem->rate = rate;
30
31 if(format == 8)
32 soundsystem->buffersize = buffersize;
33 else if(format == 16)
34 soundsystem->buffersize = buffersize * sizeof(short);
35
36 soundsystem->mixbuffer = (s8*)SDL_malloc(soundsystem->buffersize);
37 //soundsystem->soundbuffer = soundsystem->mixbuffer;
38 soundsystem->format = format;
39 soundsystem->channel = channel;
40 soundsystem->prevtimer = 0;
41 soundsystem->soundcursor = 0;
42 soundsystem->numsamples = 0;
43 soundsystem->period = 0x1000000 / rate;
44 soundsystem->cmd = INIT;
45 }
46
SoundStartMixer(void)47 void SoundStartMixer(void)
48 {
49 soundsystem->cmd |= MIX;
50 }
51
SendCommandToArm7(u32 command)52 void SendCommandToArm7(u32 command)
53 {
54 while (REG_IPC_FIFO_CR & IPC_FIFO_SEND_FULL);
55 if (REG_IPC_FIFO_CR & IPC_FIFO_ERROR)
56 {
57 REG_IPC_FIFO_CR |= IPC_FIFO_SEND_CLEAR;
58 }
59
60 REG_IPC_FIFO_TX = command;
61 }
62