Mercurial > sdl-ios-xcode
annotate src/audio/nds/sound9.c @ 4001:6831b8723a85 SDL-1.2
Don't initialize the audio buffer passed to the application's audio callback,
since they are expected to entirely fill it with data or silence.
For legacy apps that might expect the buffer to already have silence and thus
may not fill the buffer in the callback, there's an environment variable to
expose the old behaviour.
Fixes Bugzilla #416.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 05 Jul 2007 02:24:36 +0000 |
| parents | 8582c6a5ca16 |
| children | a1b03ba2fcd0 |
| rev | line source |
|---|---|
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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>
parents:
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1 /* |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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2 SDL - Simple DirectMedia Layer |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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3 Copyright (C) 1997-2006 Sam Lantinga |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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4 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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5 This library is free software; you can redistribute it and/or |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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6 modify it under the terms of the GNU Lesser General Public |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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7 License as published by the Free Software Foundation; either |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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8 version 2.1 of the License, or (at your option) any later version. |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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9 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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10 This library is distributed in the hope that it will be useful, |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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13 Lesser General Public License for more details. |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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14 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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15 You should have received a copy of the GNU Lesser General Public |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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16 License along with this library; if not, write to the Free Software |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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18 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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19 Sam Lantinga |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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20 slouken@libsdl.org |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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21 */ |
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Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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22 #include "SDL_config.h" |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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23 #include "SDL_stdinc.h" |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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24 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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25 #include "soundcommon.h" |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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26 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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27 void SoundSystemInit(u32 rate,u32 buffersize,u8 channel,u8 format) |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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28 { |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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29 soundsystem->rate = rate; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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30 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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31 if(format == 8) |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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32 soundsystem->buffersize = buffersize; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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33 else if(format == 16) |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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34 soundsystem->buffersize = buffersize * sizeof(short); |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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35 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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36 soundsystem->mixbuffer = (s8*)SDL_malloc(soundsystem->buffersize); |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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37 //soundsystem->soundbuffer = soundsystem->mixbuffer; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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38 soundsystem->format = format; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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39 soundsystem->channel = channel; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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40 soundsystem->prevtimer = 0; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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41 soundsystem->soundcursor = 0; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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42 soundsystem->numsamples = 0; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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43 soundsystem->period = 0x1000000 / rate; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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44 soundsystem->cmd = INIT; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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45 } |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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46 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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47 void SoundStartMixer(void) |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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48 { |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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49 soundsystem->cmd |= MIX; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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50 } |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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51 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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52 void SendCommandToArm7(u32 command) |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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53 { |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
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54 while (REG_IPC_FIFO_CR & IPC_FIFO_SEND_FULL); |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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55 if (REG_IPC_FIFO_CR & IPC_FIFO_ERROR) |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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56 { |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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57 REG_IPC_FIFO_CR |= IPC_FIFO_SEND_CLEAR; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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58 } |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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59 |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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60 REG_IPC_FIFO_TX = command; |
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8582c6a5ca16
Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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61 } |