1 /*

     2     SDL - Simple DirectMedia Layer

     3     Copyright (C) 1997-2006 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 

    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 

    47 void SoundStartMixer(void)

    48 {

    49 	soundsystem->cmd |= MIX;

    50 }

    51 

    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 }