Mercurial > sdl-ios-xcode
annotate src/audio/dsp/SDL_dspaudio.c @ 1348:40d0975c1769
Date: Mon, 6 Feb 2006 11:41:04 -0500
From: "mystml@adinet.com.uy"
Subject: [SDL] ALT-F4 using DirectX
My game isn't getting SDL_QUIT when I press ALT-F4 using the DirectX
driver; it does get SDL_QUIT when I press the red X in the window.
I tracked this down to DX5_HandleMessage() in SDL_dx5events.c;
WM_SYSKEYDOWN is being trapped and ignored which causes Windows not to post
a WM_CLOSE, hence no SDL_QUIT is being generated.
The relevant code is this :
/* The keyboard is handled via DirectInput */
case WM_SYSKEYUP:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_KEYDOWN: {
/* Ignore windows keyboard messages */;
}
return(0);
If I comment the WM_SYSKEYDOWN case, it falls through DefWindowProc() and
ALT-F4 starts working again.
I'm not sure about the best way to fix this. One option is handling ALT-F4
as a particular case somehow, but doesn't sound good. Another option would
be to handle WM_SYSKEYDOWN separately and breaking instead of returning 0,
so processing falls through and goes to DefWindowProc which does The Right
Thing (TM). This seems to be the minimal change that makes ALT-F4 work and
normal keyboard input continues to work.
Does this sound reasonable? Am I overlooking anything? Do I submit a patch?
--Gabriel
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 08 Feb 2006 17:19:43 +0000 |
| parents | d02b552e5304 |
| children | c71e05b4dc2e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
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21 |
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22 Modified in Oct 2004 by Hannu Savolainen |
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23 hannu@opensound.com |
| 0 | 24 */ |
| 25 | |
| 26 /* Allow access to a raw mixing buffer */ | |
| 27 | |
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28 #include <stdio.h> /* For perror() */ |
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29 #include <string.h> /* For strerror() */ |
| 0 | 30 #include <errno.h> |
| 31 #include <unistd.h> | |
| 32 #include <fcntl.h> | |
| 33 #include <signal.h> | |
| 34 #include <sys/time.h> | |
| 35 #include <sys/ioctl.h> | |
| 36 #include <sys/stat.h> | |
|
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37 #ifdef OSS_USE_SOUNDCARD_H |
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38 /* This is installed on some systems */ |
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39 #include <soundcard.h> |
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40 #else |
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41 /* This is recommended by OSS */ |
| 0 | 42 #include <sys/soundcard.h> |
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43 #endif |
| 0 | 44 |
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45 #include "SDL_stdlib.h" |
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46 #include "SDL_string.h" |
| 0 | 47 #include "SDL_audio.h" |
| 48 #include "SDL_error.h" | |
| 49 #include "SDL_audiomem.h" | |
| 50 #include "SDL_audio_c.h" | |
| 51 #include "SDL_timer.h" | |
| 52 #include "SDL_audiodev_c.h" | |
| 53 #include "SDL_dspaudio.h" | |
| 54 | |
| 55 /* The tag name used by DSP audio */ | |
| 56 #define DSP_DRIVER_NAME "dsp" | |
| 57 | |
| 58 /* Open the audio device for playback, and don't block if busy */ | |
| 59 #define OPEN_FLAGS (O_WRONLY|O_NONBLOCK) | |
| 60 | |
| 61 /* Audio driver functions */ | |
| 62 static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 63 static void DSP_WaitAudio(_THIS); | |
| 64 static void DSP_PlayAudio(_THIS); | |
| 65 static Uint8 *DSP_GetAudioBuf(_THIS); | |
| 66 static void DSP_CloseAudio(_THIS); | |
| 67 | |
| 68 /* Audio driver bootstrap functions */ | |
| 69 | |
| 70 static int Audio_Available(void) | |
| 71 { | |
| 72 int fd; | |
| 73 int available; | |
| 74 | |
| 75 available = 0; | |
| 76 fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0); | |
| 77 if ( fd >= 0 ) { | |
| 78 available = 1; | |
| 79 close(fd); | |
| 80 } | |
| 81 return(available); | |
| 82 } | |
| 83 | |
| 84 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 85 { | |
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86 SDL_free(device->hidden); |
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87 SDL_free(device); |
| 0 | 88 } |
| 89 | |
| 90 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 91 { | |
| 92 SDL_AudioDevice *this; | |
| 93 | |
| 94 /* Initialize all variables that we clean on shutdown */ | |
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95 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 96 if ( this ) { |
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97 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 98 this->hidden = (struct SDL_PrivateAudioData *) |
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99 SDL_malloc((sizeof *this->hidden)); |
| 0 | 100 } |
| 101 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 102 SDL_OutOfMemory(); | |
| 103 if ( this ) { | |
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104 SDL_free(this); |
| 0 | 105 } |
| 106 return(0); | |
| 107 } | |
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108 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 109 audio_fd = -1; |
| 110 | |
| 111 /* Set the function pointers */ | |
| 112 this->OpenAudio = DSP_OpenAudio; | |
| 113 this->WaitAudio = DSP_WaitAudio; | |
| 114 this->PlayAudio = DSP_PlayAudio; | |
| 115 this->GetAudioBuf = DSP_GetAudioBuf; | |
| 116 this->CloseAudio = DSP_CloseAudio; | |
| 117 | |
| 118 this->free = Audio_DeleteDevice; | |
| 119 | |
| 120 return this; | |
| 121 } | |
| 122 | |
| 123 AudioBootStrap DSP_bootstrap = { | |
| 124 DSP_DRIVER_NAME, "OSS /dev/dsp standard audio", | |
| 125 Audio_Available, Audio_CreateDevice | |
| 126 }; | |
| 127 | |
| 128 /* This function waits until it is possible to write a full sound buffer */ | |
| 129 static void DSP_WaitAudio(_THIS) | |
| 130 { | |
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131 /* Not needed at all since OSS handles waiting automagically */ |
| 0 | 132 } |
| 133 | |
| 134 static void DSP_PlayAudio(_THIS) | |
| 135 { | |
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136 if (write(audio_fd, mixbuf, mixlen)==-1) |
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137 { |
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138 perror("Audio write"); |
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139 this->enabled = 0; |
| 0 | 140 } |
| 141 | |
| 142 #ifdef DEBUG_AUDIO | |
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143 fprintf(stderr, "Wrote %d bytes of audio data\n", mixlen); |
| 0 | 144 #endif |
| 145 } | |
| 146 | |
| 147 static Uint8 *DSP_GetAudioBuf(_THIS) | |
| 148 { | |
| 149 return(mixbuf); | |
| 150 } | |
| 151 | |
| 152 static void DSP_CloseAudio(_THIS) | |
| 153 { | |
| 154 if ( mixbuf != NULL ) { | |
| 155 SDL_FreeAudioMem(mixbuf); | |
| 156 mixbuf = NULL; | |
| 157 } | |
| 158 if ( audio_fd >= 0 ) { | |
| 159 close(audio_fd); | |
| 160 audio_fd = -1; | |
| 161 } | |
| 162 } | |
| 163 | |
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164 static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec) |
| 0 | 165 { |
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166 char audiodev[1024]; |
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167 int format; |
| 0 | 168 int value; |
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169 int frag_spec; |
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170 Uint16 test_format; |
| 0 | 171 |
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172 /* Open the audio device */ |
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173 audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0); |
| 0 | 174 if ( audio_fd < 0 ) { |
| 175 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); | |
| 176 return(-1); | |
| 177 } | |
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178 mixbuf = NULL; |
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179 |
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180 /* Make the file descriptor use blocking writes with fcntl() */ |
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181 { long flags; |
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182 flags = fcntl(audio_fd, F_GETFL); |
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183 flags &= ~O_NONBLOCK; |
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184 if ( fcntl(audio_fd, F_SETFL, flags) < 0 ) { |
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185 SDL_SetError("Couldn't set audio blocking mode"); |
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186 DSP_CloseAudio(this); |
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187 return(-1); |
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188 } |
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189 } |
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190 |
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191 /* Get a list of supported hardware formats */ |
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192 if ( ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0 ) { |
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193 perror("SNDCTL_DSP_GETFMTS"); |
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194 SDL_SetError("Couldn't get audio format list"); |
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195 DSP_CloseAudio(this); |
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196 return(-1); |
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197 } |
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198 |
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199 /* Try for a closest match on audio format */ |
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200 format = 0; |
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201 for ( test_format = SDL_FirstAudioFormat(spec->format); |
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202 ! format && test_format; ) { |
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203 #ifdef DEBUG_AUDIO |
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204 fprintf(stderr, "Trying format 0x%4.4x\n", test_format); |
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205 #endif |
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206 switch ( test_format ) { |
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207 case AUDIO_U8: |
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208 if ( value & AFMT_U8 ) { |
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209 format = AFMT_U8; |
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210 } |
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211 break; |
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212 case AUDIO_S16LSB: |
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213 if ( value & AFMT_S16_LE ) { |
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214 format = AFMT_S16_LE; |
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215 } |
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216 break; |
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217 case AUDIO_S16MSB: |
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218 if ( value & AFMT_S16_BE ) { |
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219 format = AFMT_S16_BE; |
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220 } |
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221 break; |
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222 #if 0 |
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223 /* |
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224 * These formats are not used by any real life systems so they are not |
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225 * needed here. |
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226 */ |
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227 case AUDIO_S8: |
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228 if ( value & AFMT_S8 ) { |
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229 format = AFMT_S8; |
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230 } |
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231 break; |
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232 case AUDIO_U16LSB: |
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233 if ( value & AFMT_U16_LE ) { |
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234 format = AFMT_U16_LE; |
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235 } |
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236 break; |
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237 case AUDIO_U16MSB: |
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238 if ( value & AFMT_U16_BE ) { |
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239 format = AFMT_U16_BE; |
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240 } |
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241 break; |
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242 #endif |
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243 default: |
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244 format = 0; |
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245 break; |
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246 } |
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247 if ( ! format ) { |
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248 test_format = SDL_NextAudioFormat(); |
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249 } |
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250 } |
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251 if ( format == 0 ) { |
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252 SDL_SetError("Couldn't find any hardware audio formats"); |
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253 DSP_CloseAudio(this); |
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254 return(-1); |
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255 } |
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256 spec->format = test_format; |
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257 |
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258 /* Set the audio format */ |
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259 value = format; |
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260 if ( (ioctl(audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) || |
|
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261 (value != format) ) { |
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262 perror("SNDCTL_DSP_SETFMT"); |
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263 SDL_SetError("Couldn't set audio format"); |
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264 DSP_CloseAudio(this); |
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265 return(-1); |
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266 } |
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267 |
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268 /* Set the number of channels of output */ |
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269 value = spec->channels; |
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270 if ( ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &value) < 0 ) { |
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271 perror("SNDCTL_DSP_CHANNELS"); |
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272 SDL_SetError("Cannot set the number of channels"); |
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273 DSP_CloseAudio(this); |
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274 return(-1); |
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275 } |
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276 spec->channels = value; |
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277 |
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278 /* Set the DSP frequency */ |
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279 value = spec->freq; |
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280 if ( ioctl(audio_fd, SNDCTL_DSP_SPEED, &value) < 0 ) { |
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281 perror("SNDCTL_DSP_SPEED"); |
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282 SDL_SetError("Couldn't set audio frequency"); |
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283 DSP_CloseAudio(this); |
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284 return(-1); |
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285 } |
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286 spec->freq = value; |
| 0 | 287 |
| 288 /* Calculate the final parameters for this audio specification */ | |
| 289 SDL_CalculateAudioSpec(spec); | |
| 290 | |
| 291 /* Determine the power of two of the fragment size */ | |
| 292 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); | |
| 293 if ( (0x01<<frag_spec) != spec->size ) { | |
| 294 SDL_SetError("Fragment size must be a power of two"); | |
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295 DSP_CloseAudio(this); |
| 0 | 296 return(-1); |
| 297 } | |
| 298 frag_spec |= 0x00020000; /* two fragments, for low latency */ | |
| 299 | |
| 300 /* Set the audio buffering parameters */ | |
| 301 #ifdef DEBUG_AUDIO | |
| 302 fprintf(stderr, "Requesting %d fragments of size %d\n", | |
| 303 (frag_spec >> 16), 1<<(frag_spec&0xFFFF)); | |
| 304 #endif | |
| 305 if ( ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_spec) < 0 ) { | |
|
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306 perror("SNDCTL_DSP_SETFRAGMENT"); |
| 0 | 307 } |
| 308 #ifdef DEBUG_AUDIO | |
| 309 { audio_buf_info info; | |
| 310 ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info); | |
| 311 fprintf(stderr, "fragments = %d\n", info.fragments); | |
| 312 fprintf(stderr, "fragstotal = %d\n", info.fragstotal); | |
| 313 fprintf(stderr, "fragsize = %d\n", info.fragsize); | |
| 314 fprintf(stderr, "bytes = %d\n", info.bytes); | |
| 315 } | |
| 316 #endif | |
| 317 | |
| 318 /* Allocate mixing buffer */ | |
| 319 mixlen = spec->size; | |
| 320 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); | |
| 321 if ( mixbuf == NULL ) { | |
|
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322 DSP_CloseAudio(this); |
| 0 | 323 return(-1); |
| 324 } | |
|
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325 SDL_memset(mixbuf, spec->silence, spec->size); |
| 0 | 326 |
| 327 /* Get the parent process id (we're the parent of the audio thread) */ | |
| 328 parent = getpid(); | |
| 329 | |
| 330 /* We're ready to rock and roll. :-) */ | |
| 331 return(0); | |
| 332 } |