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annotate src/audio/nds/sound9.c @ 3976:8582c6a5ca16 SDL-1.2

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Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
author Sam Lantinga <slouken@libsdl.org>
date Mon, 25 Jun 2007 00:50:20 +0000
parents
children a1b03ba2fcd0
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3976
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23 #include "SDL_stdinc.h"
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24
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25 #include "soundcommon.h"
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26
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27 void SoundSystemInit(u32 rate,u32 buffersize,u8 channel,u8 format)
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28 {
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29 soundsystem->rate = rate;
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30
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31 if(format == 8)
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32 soundsystem->buffersize = buffersize;
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33 else if(format == 16)
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34 soundsystem->buffersize = buffersize * sizeof(short);
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35
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36 soundsystem->mixbuffer = (s8*)SDL_malloc(soundsystem->buffersize);
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37 //soundsystem->soundbuffer = soundsystem->mixbuffer;
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38 soundsystem->format = format;
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39 soundsystem->channel = channel;
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40 soundsystem->prevtimer = 0;
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41 soundsystem->soundcursor = 0;
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42 soundsystem->numsamples = 0;
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43 soundsystem->period = 0x1000000 / rate;
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44 soundsystem->cmd = INIT;
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45 }
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46
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47 void SoundStartMixer(void)
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48 {
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49 soundsystem->cmd |= MIX;
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50 }
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51
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52 void SendCommandToArm7(u32 command)
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53 {
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54 while (REG_IPC_FIFO_CR & IPC_FIFO_SEND_FULL);
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55 if (REG_IPC_FIFO_CR & IPC_FIFO_ERROR)
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56 {
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57 REG_IPC_FIFO_CR |= IPC_FIFO_SEND_CLEAR;
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58 }
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59
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60 REG_IPC_FIFO_TX = command;
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61 }