Mercurial > sdl-ios-xcode
annotate src/audio/nto/SDL_nto_audio.c @ 663:8bedd6d61642
Date: Sat, 2 Aug 2003 16:22:51 +0300
From: "Mike Gorchak"
Subject: New patches for QNX6
Here my patches for the SDL/QNX:
QNXSDL.diff - diff to non-QNX related sources:
- updated BUGS file, I think QNX6 is now will be officially supported
- configure.in - added shared library support for QNX, and removed dependency between the ALSA and QNX6.
- SDL_audio.c - added QNX NTO sound bootstrap insted of ALSA's.
- SDL_sysaudio.h - the same.
- SDL_nto_audio.c - the same.
- SDL_video.c - right now, QNX doesn't offer any method to obtain pointers to the OpenGL functions by function name, so they must be hardcoded in library, otherwise OpenGL will not be supported.
- testsprite.c - fixed: do not draw vertical red line if we are in non-double-buffered mode.
sdlqnxph.tar.gz - archive of the ./src/video/photon/* . Too many changes in code to make diffs :) :
+ Added stub for support hide/unhide window event
+ Added full YUV overlays support.
+ Added window maximize support.
+ Added mouse wheel events.
+ Added support for some specific key codes in Unicode mode (like ESC).
+ Added more checks to the all memory allocation code.
+ Added SDL_DOUBLEBUF support in all fullscreen modes.
+ Added fallback to window mode, if desired fullscreen mode is not supported.
+ Added stub support for the GL_LoadLibrary and GL_GetProcAddress functions.
+ Added resizable window support without caption.
! Fixed bug in the Ph_EV_EXPOSE event handler, when rectangles to update is 0 and when width or height of the rectangle is 0.
! Fixed bug in the event handler code. Events has not been passed to the window widget handler.
! Fixed codes for Win keys (Super/Hyper/Menu).
! Fixed memory leak, when deallocation palette.
! Fixed palette emulation code bugs.
! Fixed fullscreen and hwsurface handling.
! Fixed CLOSE button bug. First event was passed to the handler, but second terminated the application. Now all events passed to the application correctly.
- Removed all printfs in code, now SDL_SetError used instead of them.
- Disabled ToggleFullScreen function.
README.QNX - updated README.QNX file. Added much more issues.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 04 Aug 2003 00:52:42 +0000 |
| parents | b82518082828 |
| children | cbc0f7fabd1c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #include <stdlib.h> | |
| 24 #include <stdio.h> | |
| 25 #include <string.h> | |
| 26 #include <errno.h> | |
| 27 #include <unistd.h> | |
| 28 #include <fcntl.h> | |
| 29 #include <signal.h> | |
| 30 #include <sys/types.h> | |
| 31 #include <sys/time.h> | |
| 32 #include <sched.h> | |
| 33 #include <sys/asoundlib.h> | |
|
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34 #include <sys/select.h> |
| 0 | 35 |
| 36 #include "SDL_audio.h" | |
| 37 #include "SDL_error.h" | |
| 38 #include "SDL_audiomem.h" | |
| 39 #include "SDL_audio_c.h" | |
| 40 #include "SDL_timer.h" | |
| 41 #include "SDL_nto_audio.h" | |
| 42 | |
| 43 /* The tag name used by NTO audio */ | |
| 44 #define DRIVER_NAME "nto" | |
| 45 | |
| 46 /* default channel communication parameters */ | |
| 47 #define DEFAULT_CPARAMS_RATE 22050 | |
| 48 #define DEFAULT_CPARAMS_VOICES 1 | |
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49 #define DEFAULT_CPARAMS_FRAG_SIZE 4096 |
| 0 | 50 #define DEFAULT_CPARAMS_FRAGS_MIN 1 |
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51 #define DEFAULT_CPARAMS_FRAGS_MAX 1 |
| 0 | 52 |
| 53 /* Open the audio device for playback, and don't block if busy */ | |
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54 #define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK |
| 0 | 55 |
| 56 /* Audio driver functions */ | |
| 57 static int NTO_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 58 static void NTO_WaitAudio(_THIS); | |
| 59 static void NTO_PlayAudio(_THIS); | |
| 60 static Uint8 *NTO_GetAudioBuf(_THIS); | |
| 61 static void NTO_CloseAudio(_THIS); | |
| 62 | |
| 63 static snd_pcm_channel_status_t cstatus; | |
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64 static snd_pcm_channel_params_t cparams; |
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65 static snd_pcm_channel_setup_t csetup; |
| 0 | 66 |
| 67 /* PCM transfer channel parameters initialize function */ | |
| 68 static void init_pcm_cparams(snd_pcm_channel_params_t* cparams) | |
| 69 { | |
| 70 memset(cparams,0,sizeof(snd_pcm_channel_params_t)); | |
| 71 | |
| 72 cparams->channel = SND_PCM_CHANNEL_PLAYBACK; | |
| 73 cparams->mode = SND_PCM_MODE_BLOCK; | |
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74 cparams->start_mode = SND_PCM_START_DATA; |
| 0 | 75 cparams->stop_mode = SND_PCM_STOP_STOP; |
| 76 cparams->format.format = SND_PCM_SFMT_S16_LE; | |
| 77 cparams->format.interleave = 1; | |
| 78 cparams->format.rate = DEFAULT_CPARAMS_RATE; | |
| 79 cparams->format.voices = DEFAULT_CPARAMS_VOICES; | |
| 80 cparams->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE; | |
| 81 cparams->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN; | |
| 82 cparams->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX; | |
| 83 } | |
| 84 | |
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85 static int Audio_Available(void) |
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86 { |
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87 /* |
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88 See if we can open a nonblocking channel. |
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89 Return value '1' means we can. |
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90 Return value '0' means we cannot. |
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91 */ |
| 0 | 92 |
| 93 int available; | |
| 94 int rval; | |
| 95 snd_pcm_t *handle; | |
| 96 | |
| 97 available = 0; | |
| 98 handle = NULL; | |
| 99 | |
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100 rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS); |
| 0 | 101 |
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102 if (rval >= 0){ |
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103 available = 1; |
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104 |
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105 if ((rval = snd_pcm_close(handle)) < 0){ |
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106 SDL_SetError("snd_pcm_close failed: %s\n",snd_strerror(rval)); |
| 0 | 107 available = 0; |
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108 } |
| 0 | 109 } |
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110 else{ |
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111 SDL_SetError("snd_pcm_open failed: %s\n", snd_strerror(rval)); |
| 0 | 112 } |
| 113 | |
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114 #ifdef DEBUG_AUDIO |
| 0 | 115 fprintf(stderr,"AudioAvailable rtns %d\n", available); |
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116 #endif |
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117 |
| 0 | 118 return(available); |
| 119 } | |
| 120 | |
| 121 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 122 { | |
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123 #ifdef DEBUG_AUDIO |
| 0 | 124 fprintf(stderr,"Audio_DeleteDevice\n"); |
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125 #endif |
| 0 | 126 |
| 127 free(device->hidden); | |
| 128 free(device); | |
| 129 } | |
| 130 | |
| 131 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 132 { | |
| 133 SDL_AudioDevice *this; | |
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134 #ifdef DEBUG_AUDIO |
| 0 | 135 fprintf(stderr,"Audio_CreateDevice\n"); |
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136 #endif |
| 0 | 137 /* Initialize all variables that we clean on shutdown */ |
| 138 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); | |
| 139 if ( this ) { | |
| 140 memset(this, 0, (sizeof *this)); | |
| 141 this->hidden = (struct SDL_PrivateAudioData *) | |
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142 malloc((sizeof *this->hidden)); |
| 0 | 143 } |
| 144 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 145 SDL_OutOfMemory(); | |
| 146 if ( this ) { | |
| 147 free(this); | |
| 148 } | |
| 149 return(0); | |
| 150 } | |
| 151 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 152 audio_handle = NULL; | |
| 153 | |
| 154 /* Set the function pointers */ | |
| 155 this->OpenAudio = NTO_OpenAudio; | |
| 156 this->WaitAudio = NTO_WaitAudio; | |
| 157 this->PlayAudio = NTO_PlayAudio; | |
| 158 this->GetAudioBuf = NTO_GetAudioBuf; | |
| 159 this->CloseAudio = NTO_CloseAudio; | |
| 160 | |
| 161 this->free = Audio_DeleteDevice; | |
| 162 | |
| 163 return this; | |
| 164 } | |
| 165 | |
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166 AudioBootStrap QNXNTOAUDIO_bootstrap = { |
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167 DRIVER_NAME, "QNX6 NTO PCM audio", |
| 0 | 168 Audio_Available, Audio_CreateDevice |
| 169 }; | |
| 170 | |
| 171 /* This function waits until it is possible to write a full sound buffer */ | |
| 172 static void NTO_WaitAudio(_THIS) | |
| 173 { | |
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174 fd_set wfds; |
| 0 | 175 |
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176 FD_SET( audio_fd, &wfds ); |
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177 switch( select( audio_fd + 1, NULL, &wfds, NULL, NULL ) ) |
| 0 | 178 { |
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179 case -1: |
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180 case 0: |
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181 /* Error */ |
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182 SDL_SetError("select() in NTO_WaitAudio failed: %s\n", strerror(errno)); |
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183 break; |
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184 default: |
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185 if(FD_ISSET(audio_fd, &wfds)) |
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186 return; |
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187 } |
| 0 | 188 } |
| 189 | |
| 190 static void NTO_PlayAudio(_THIS) | |
| 191 { | |
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192 int written, rval; |
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193 int towrite; |
| 0 | 194 |
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195 #ifdef DEBUG_AUDIO |
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196 fprintf(stderr, "NTO_PlayAudio\n"); |
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197 #endif |
| 0 | 198 |
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199 if( !this->enabled){ |
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200 return; |
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201 } |
| 0 | 202 |
| 203 towrite = pcm_len; | |
| 204 | |
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205 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */ |
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206 do { |
| 0 | 207 written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite); |
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208 #ifdef DEBUG_AUDIO |
| 0 | 209 fprintf(stderr, "NTO_PlayAudio: written = %d towrite = %d\n",written,towrite); |
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210 #endif |
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211 if (written != towrite){ |
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212 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)){ |
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213 SDL_Delay(1); /* Let a little CPU time go by and try to write again */ |
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214 #ifdef DEBUG_AUDIO |
| 0 | 215 fprintf(stderr, "errno == EAGAIN written %d\n", written); |
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216 #endif |
| 0 | 217 towrite -= written; //we wrote some data |
| 218 continue; | |
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219 } |
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220 else if((errno == EINVAL) || (errno == EIO)){ |
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221 if(errno == EIO){ |
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222 #ifdef DEBUG_AUDIO |
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223 fprintf(stderr,"snd_pcm_plugin_write failed EIO: %s\n", snd_strerror(written)); |
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224 #endif |
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225 } |
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226 if(errno == EINVAL){ |
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227 #ifdef DEBUG_AUDIO |
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228 fprintf(stderr,"snd_pcm_plugin_write failed EINVAL: %s\n", snd_strerror(written)); |
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229 #endif |
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230 } |
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231 |
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232 memset(&cstatus, 0, sizeof(cstatus)); |
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233 if( (rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0 ){ |
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234 #ifdef DEBUG_AUDIO |
| 0 | 235 fprintf(stderr, "snd_pcm_plugin_status failed %s\n",snd_strerror(rval)); |
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236 #endif |
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237 SDL_SetError("snd_pcm_plugin_status failed: %s\n", snd_strerror(rval)); |
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238 return; |
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239 } |
| 0 | 240 |
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241 if ( (cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY) ){ |
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242 #ifdef DEBUG_AUDIO |
| 0 | 243 fprintf(stderr, "buffer underrun\n"); |
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244 #endif |
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245 if ( (rval = snd_pcm_plugin_prepare (audio_handle,SND_PCM_CHANNEL_PLAYBACK)) < 0 ){ |
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246 #ifdef DEBUG_AUDIO |
| 0 | 247 fprintf(stderr, "NTO_PlayAudio: prepare failed %s\n",snd_strerror(rval)); |
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248 #endif |
| 0 | 249 SDL_SetError("snd_pcm_plugin_prepare failed: %s\n",snd_strerror(rval) ); |
| 250 return; | |
| 251 } | |
| 252 } | |
| 253 continue; | |
| 254 } | |
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255 else{ |
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256 #ifdef DEBUG_AUDIO |
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257 fprintf(stderr, "NTO_PlayAudio: snd_pcm_plugin_write failed unknown errno %d %s\n",errno, snd_strerror(rval)); |
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258 #endif |
| 0 | 259 return; |
| 260 } | |
| 261 | |
| 262 } | |
| 263 else | |
| 264 { | |
| 265 towrite -= written; //we wrote all remaining data | |
| 266 } | |
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267 } while ( (towrite > 0) && (this->enabled) ); |
| 0 | 268 |
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269 /* If we couldn't write, assume fatal error for now */ |
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270 if ( towrite != 0 ) { |
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271 this->enabled = 0; |
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272 } |
| 0 | 273 return; |
| 274 } | |
| 275 | |
| 276 static Uint8 *NTO_GetAudioBuf(_THIS) | |
| 277 { | |
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278 #ifdef DEBUG_AUDIO |
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279 fprintf(stderr, "NTO_GetAudioBuf: pcm_buf %X\n",(Uint8 *)pcm_buf); |
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280 #endif |
| 0 | 281 return(pcm_buf); |
| 282 } | |
| 283 | |
| 284 static void NTO_CloseAudio(_THIS) | |
| 285 { | |
| 286 int rval; | |
| 287 | |
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288 #ifdef DEBUG_AUDIO |
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289 fprintf(stderr, "NTO_CloseAudio\n"); |
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290 #endif |
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291 |
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292 this->enabled = 0; |
| 0 | 293 |
| 294 if ( audio_handle != NULL ) { | |
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295 if ((rval = snd_pcm_plugin_flush(audio_handle,SND_PCM_CHANNEL_PLAYBACK)) < 0){ |
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296 SDL_SetError("snd_pcm_plugin_flush failed: %s\n",snd_strerror(rval)); |
| 0 | 297 return; |
| 298 } | |
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299 if ((rval = snd_pcm_close(audio_handle)) < 0){ |
| 0 | 300 SDL_SetError("snd_pcm_close failed: %s\n",snd_strerror(rval)); |
| 301 return; | |
| 302 } | |
| 303 audio_handle = NULL; | |
| 304 } | |
| 305 } | |
| 306 | |
| 307 static int NTO_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 308 { | |
| 309 int rval; | |
| 310 int format; | |
| 311 Uint16 test_format; | |
| 312 int twidth; | |
| 313 int found; | |
| 314 | |
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315 #ifdef DEBUG_AUDIO |
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316 fprintf(stderr, "NTO_OpenAudio\n"); |
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317 #endif |
| 0 | 318 |
| 319 audio_handle = NULL; | |
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320 this->enabled = 0; |
| 0 | 321 |
| 322 if ( pcm_buf != NULL ) { | |
| 323 free((Uint8 *)pcm_buf); | |
| 324 pcm_buf = NULL; | |
| 325 } | |
| 326 | |
| 327 /* initialize channel transfer parameters to default */ | |
| 328 init_pcm_cparams(&cparams); | |
| 329 | |
| 330 /* Open the audio device */ | |
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331 rval = snd_pcm_open_preferred(&audio_handle, NULL, NULL, OPEN_FLAGS); |
| 0 | 332 if ( rval < 0 ) { |
| 333 SDL_SetError("snd_pcm_open failed: %s\n", snd_strerror(rval)); | |
| 334 return(-1); | |
| 335 } | |
| 336 | |
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337 /* enable count status parameter */ |
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338 if ((rval = snd_pcm_plugin_set_disable(audio_handle, PLUGIN_DISABLE_MMAP))<0){ |
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339 SDL_SetError("snd_pcm_plugin_set_disable failed: %s\n", snd_strerror(rval)); |
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340 return(-1); |
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341 } |
| 0 | 342 |
| 343 /* Try for a closest match on audio format */ | |
| 344 format = 0; | |
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345 found = 0; /* can't use format as SND_PCM_SFMT_U8 = 0 in nto */ |
| 0 | 346 for ( test_format = SDL_FirstAudioFormat(spec->format); !found ; ) |
| 347 { | |
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348 #ifdef DEBUG_AUDIO |
| 0 | 349 fprintf(stderr, "Trying format 0x%4.4x spec->samples %d\n", test_format,spec->samples); |
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350 #endif |
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351 |
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352 /* if match found set format to equivalent ALSA format */ |
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353 switch ( test_format ) { |
| 0 | 354 case AUDIO_U8: |
| 355 format = SND_PCM_SFMT_U8; | |
| 356 found = 1; | |
| 357 break; | |
| 358 case AUDIO_S8: | |
| 359 format = SND_PCM_SFMT_S8; | |
| 360 found = 1; | |
| 361 break; | |
| 362 case AUDIO_S16LSB: | |
| 363 format = SND_PCM_SFMT_S16_LE; | |
| 364 found = 1; | |
| 365 break; | |
| 366 case AUDIO_S16MSB: | |
| 367 format = SND_PCM_SFMT_S16_BE; | |
| 368 found = 1; | |
| 369 break; | |
| 370 case AUDIO_U16LSB: | |
| 371 format = SND_PCM_SFMT_U16_LE; | |
| 372 found = 1; | |
| 373 break; | |
| 374 case AUDIO_U16MSB: | |
| 375 format = SND_PCM_SFMT_U16_BE; | |
| 376 found = 1; | |
| 377 break; | |
| 378 default: | |
| 379 break; | |
| 380 } | |
| 381 if ( ! found ) { | |
| 382 test_format = SDL_NextAudioFormat(); | |
| 383 } | |
| 384 } | |
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385 |
| 0 | 386 /* assumes test_format not 0 on success */ |
| 387 if ( test_format == 0 ) { | |
| 388 SDL_SetError("Couldn't find any hardware audio formats"); | |
| 389 return(-1); | |
| 390 } | |
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391 |
| 0 | 392 spec->format = test_format; |
| 393 | |
| 394 /* Set the audio format */ | |
| 395 cparams.format.format = format; | |
| 396 | |
| 397 /* Set mono or stereo audio (currently only two channels supported) */ | |
| 398 cparams.format.voices = spec->channels; | |
| 399 | |
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400 #ifdef DEBUG_AUDIO |
| 0 | 401 fprintf(stderr,"intializing channels %d\n", cparams.format.voices); |
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402 #endif |
| 0 | 403 |
| 404 /* Set rate */ | |
| 405 cparams.format.rate = spec->freq ; | |
| 406 | |
| 407 /* Setup the transfer parameters according to cparams */ | |
| 408 rval = snd_pcm_plugin_params(audio_handle, &cparams); | |
| 409 if (rval < 0) { | |
| 410 SDL_SetError("snd_pcm_channel_params failed: %s\n", snd_strerror (rval)); | |
| 411 return(-1); | |
| 412 } | |
| 413 | |
|
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414 /* Make sure channel is setup right one last time */ |
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415 memset( &csetup, 0, sizeof( csetup ) ); |
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416 csetup.channel = SND_PCM_CHANNEL_PLAYBACK; |
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417 if ( snd_pcm_plugin_setup( audio_handle, &csetup ) < 0 ) |
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418 { |
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419 SDL_SetError("Unable to setup playback channel\n" ); |
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420 return(-1); |
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421 } |
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422 else |
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423 { |
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424 #ifdef DEBUG_AUDIO |
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425 fprintf(stderr,"requested format: %d\n",cparams.format.format); |
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426 fprintf(stderr,"requested frag size: %d\n",cparams.buf.block.frag_size); |
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427 fprintf(stderr,"requested max frags: %d\n\n",cparams.buf.block.frags_max); |
| 0 | 428 |
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429 fprintf(stderr,"real format: %d\n", csetup.format.format ); |
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430 fprintf(stderr,"real frag size : %d\n", csetup.buf.block.frag_size ); |
| 0 | 431 fprintf(stderr,"real max frags : %d\n", csetup.buf.block.frags_max ); |
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432 #endif |
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433 } |
| 0 | 434 |
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435 /* |
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436 Allocate memory to the audio buffer and initialize with silence (Note that |
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437 buffer size must be a multiple of fragment size, so find closest multiple) |
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438 */ |
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439 |
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440 twidth = snd_pcm_format_width(format); |
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441 if (twidth < 0) { |
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442 printf("snd_pcm_format_width failed\n"); |
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443 twidth = 0; |
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444 } |
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445 |
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446 #ifdef DEBUG_AUDIO |
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447 fprintf(stderr,"format is %d bits wide\n",twidth); |
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448 #endif |
| 0 | 449 |
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450 pcm_len = spec->size ; |
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451 |
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452 #ifdef DEBUG_AUDIO |
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453 fprintf(stderr,"pcm_len set to %d\n", pcm_len); |
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454 #endif |
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455 |
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456 if (pcm_len == 0){ |
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457 pcm_len = csetup.buf.block.frag_size; |
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458 } |
| 0 | 459 |
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460 pcm_buf = (Uint8*)malloc(pcm_len); |
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461 if (pcm_buf == NULL) { |
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462 SDL_SetError("pcm_buf malloc failed\n"); |
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463 return(-1); |
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464 } |
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465 memset(pcm_buf,spec->silence,pcm_len); |
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466 |
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467 #ifdef DEBUG_AUDIO |
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468 fprintf(stderr,"pcm_buf malloced and silenced.\n"); |
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469 #endif |
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470 |
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471 /* get the file descriptor */ |
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472 if( (audio_fd = snd_pcm_file_descriptor(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0){ |
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473 fprintf(stderr, "snd_pcm_file_descriptor failed with error code: %d\n", audio_fd); |
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474 } |
| 0 | 475 |
| 476 /* Trigger audio playback */ | |
| 477 rval = snd_pcm_plugin_prepare( audio_handle, SND_PCM_CHANNEL_PLAYBACK); | |
| 478 if (rval < 0) { | |
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479 SDL_SetError("snd_pcm_plugin_prepare failed: %s\n", snd_strerror (rval)); |
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480 return(-1); |
| 0 | 481 } |
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482 |
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483 this->enabled = 1; |
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484 |
| 0 | 485 /* Get the parent process id (we're the parent of the audio thread) */ |
| 486 parent = getpid(); | |
| 487 | |
| 488 /* We're ready to rock and roll. :-) */ | |
| 489 return(0); | |
| 490 } |