Mercurial > sdl-ios-xcode
annotate src/audio/nto/SDL_nto_audio.c @ 1161:05d4b93b911e
Placate gcc's strict aliasing rules with an extra cast.
Casts to (char *) will disable strict aliasing when the compiler sees it.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Thu, 20 Oct 2005 06:53:56 +0000 |
parents | b8d311d90021 |
children | 3692456e7b0f |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 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> | |
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33 #include <sys/select.h> |
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34 #include <sys/neutrino.h> |
0 | 35 #include <sys/asoundlib.h> |
36 | |
37 #include "SDL_audio.h" | |
38 #include "SDL_error.h" | |
39 #include "SDL_audiomem.h" | |
40 #include "SDL_audio_c.h" | |
41 #include "SDL_timer.h" | |
42 #include "SDL_nto_audio.h" | |
43 | |
44 /* The tag name used by NTO audio */ | |
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45 #define DRIVER_NAME "qsa-nto" |
0 | 46 |
47 /* default channel communication parameters */ | |
48 #define DEFAULT_CPARAMS_RATE 22050 | |
49 #define DEFAULT_CPARAMS_VOICES 1 | |
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50 /* FIXME: need to add in the near future flexible logic with frag_size and frags count */ |
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51 #define DEFAULT_CPARAMS_FRAG_SIZE 4096 |
0 | 52 #define DEFAULT_CPARAMS_FRAGS_MIN 1 |
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53 #define DEFAULT_CPARAMS_FRAGS_MAX 1 |
0 | 54 |
55 /* Open the audio device for playback, and don't block if busy */ | |
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56 #define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK |
0 | 57 |
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58 #define QSA_NO_WORKAROUNDS 0x00000000 |
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59 #define QSA_MMAP_WORKAROUND 0x00000001 |
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60 |
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61 struct BuggyCards |
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62 { |
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63 char* cardname; |
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64 unsigned long bugtype; |
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65 }; |
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66 |
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67 #define QSA_WA_CARDS 3 |
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68 |
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69 struct BuggyCards buggycards[QSA_WA_CARDS]= |
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70 { |
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71 {"Sound Blaster Live!", QSA_MMAP_WORKAROUND}, |
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72 {"Vortex 8820", QSA_MMAP_WORKAROUND}, |
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73 {"Vortex 8830", QSA_MMAP_WORKAROUND}, |
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74 }; |
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75 |
0 | 76 /* Audio driver functions */ |
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77 static void NTO_ThreadInit(_THIS); |
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78 static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec); |
0 | 79 static void NTO_WaitAudio(_THIS); |
80 static void NTO_PlayAudio(_THIS); | |
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81 static Uint8* NTO_GetAudioBuf(_THIS); |
0 | 82 static void NTO_CloseAudio(_THIS); |
83 | |
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84 /* card names check to apply the workarounds */ |
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85 static int NTO_CheckBuggyCards(_THIS, unsigned long checkfor) |
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86 { |
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87 char scardname[33]; |
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88 int it; |
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89 |
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90 if (snd_card_get_name(cardno, scardname, 32)<0) |
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91 { |
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92 return 0; |
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93 } |
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94 |
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95 for (it=0; it<QSA_WA_CARDS; it++) |
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96 { |
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97 if (strcmp(buggycards[it].cardname, scardname)==0) |
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98 { |
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99 if (buggycards[it].bugtype==checkfor) |
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100 { |
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101 return 1; |
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102 } |
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103 } |
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104 } |
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105 |
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106 return 0; |
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107 } |
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108 |
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109 static void NTO_ThreadInit(_THIS) |
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110 { |
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111 int status; |
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112 struct sched_param param; |
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113 |
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114 /* increasing default 10 priority to 25 to avoid jerky sound */ |
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115 status=SchedGet(0, 0, ¶m); |
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116 param.sched_priority=param.sched_curpriority+15; |
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117 status=SchedSet(0, 0, SCHED_NOCHANGE, ¶m); |
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118 } |
0 | 119 |
120 /* PCM transfer channel parameters initialize function */ | |
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121 static void NTO_InitAudioParams(snd_pcm_channel_params_t* cpars) |
0 | 122 { |
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123 memset(cpars, 0, sizeof(snd_pcm_channel_params_t)); |
0 | 124 |
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125 cpars->channel = SND_PCM_CHANNEL_PLAYBACK; |
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126 cpars->mode = SND_PCM_MODE_BLOCK; |
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127 cpars->start_mode = SND_PCM_START_DATA; |
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128 cpars->stop_mode = SND_PCM_STOP_STOP; |
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129 cpars->format.format = SND_PCM_SFMT_S16_LE; |
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130 cpars->format.interleave = 1; |
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131 cpars->format.rate = DEFAULT_CPARAMS_RATE; |
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132 cpars->format.voices = DEFAULT_CPARAMS_VOICES; |
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133 cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE; |
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134 cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN; |
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135 cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX; |
0 | 136 } |
137 | |
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138 static int NTO_AudioAvailable(void) |
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139 { |
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140 /* See if we can open a nonblocking channel. |
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141 Return value '1' means we can. |
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142 Return value '0' means we cannot. */ |
0 | 143 |
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144 int available; |
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145 int rval; |
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146 snd_pcm_t* handle; |
0 | 147 |
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148 available = 0; |
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149 handle = NULL; |
0 | 150 |
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151 rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS); |
0 | 152 |
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153 if (rval >= 0) |
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154 { |
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155 available = 1; |
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156 |
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157 if ((rval = snd_pcm_close(handle)) < 0) |
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158 { |
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159 SDL_SetError("NTO_AudioAvailable(): snd_pcm_close failed: %s\n", snd_strerror(rval)); |
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160 available = 0; |
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161 } |
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162 } |
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163 else |
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164 { |
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165 SDL_SetError("NTO_AudioAvailable(): there are no available audio devices.\n"); |
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166 } |
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167 |
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168 return (available); |
0 | 169 } |
170 | |
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171 static void NTO_DeleteAudioDevice(SDL_AudioDevice *device) |
0 | 172 { |
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173 if ((device)&&(device->hidden)) |
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174 { |
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175 free(device->hidden); |
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176 } |
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177 if (device) |
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178 { |
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179 free(device); |
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180 } |
0 | 181 } |
182 | |
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183 static SDL_AudioDevice* NTO_CreateAudioDevice(int devindex) |
0 | 184 { |
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185 SDL_AudioDevice *this; |
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186 |
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187 /* Initialize all variables that we clean on shutdown */ |
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188 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
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189 if (this) |
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190 { |
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191 memset(this, 0, sizeof(SDL_AudioDevice)); |
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192 this->hidden = (struct SDL_PrivateAudioData *)malloc(sizeof(struct SDL_PrivateAudioData)); |
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193 } |
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194 if ((this == NULL) || (this->hidden == NULL)) |
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195 { |
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196 SDL_OutOfMemory(); |
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197 if (this) |
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198 { |
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199 free(this); |
0 | 200 } |
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201 return (0); |
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202 } |
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203 memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData)); |
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204 audio_handle = NULL; |
0 | 205 |
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206 /* Set the function pointers */ |
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207 this->ThreadInit = NTO_ThreadInit; |
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208 this->OpenAudio = NTO_OpenAudio; |
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209 this->WaitAudio = NTO_WaitAudio; |
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210 this->PlayAudio = NTO_PlayAudio; |
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211 this->GetAudioBuf = NTO_GetAudioBuf; |
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212 this->CloseAudio = NTO_CloseAudio; |
0 | 213 |
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214 this->free = NTO_DeleteAudioDevice; |
0 | 215 |
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216 return this; |
0 | 217 } |
218 | |
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219 AudioBootStrap QNXNTOAUDIO_bootstrap = |
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220 { |
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221 DRIVER_NAME, "QNX6 QSA-NTO Audio", |
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222 NTO_AudioAvailable, |
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223 NTO_CreateAudioDevice |
0 | 224 }; |
225 | |
226 /* This function waits until it is possible to write a full sound buffer */ | |
227 static void NTO_WaitAudio(_THIS) | |
228 { | |
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229 fd_set wfds; |
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230 int selectret; |
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231 |
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232 FD_ZERO(&wfds); |
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233 FD_SET(audio_fd, &wfds); |
0 | 234 |
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235 do { |
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236 selectret=select(audio_fd + 1, NULL, &wfds, NULL, NULL); |
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237 switch (selectret) |
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238 { |
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239 case -1: |
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240 case 0: SDL_SetError("NTO_WaitAudio(): select() failed: %s\n", strerror(errno)); |
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241 return; |
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242 default: if (FD_ISSET(audio_fd, &wfds)) |
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243 { |
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244 return; |
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245 } |
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246 break; |
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247 } |
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248 } while(1); |
0 | 249 } |
250 | |
251 static void NTO_PlayAudio(_THIS) | |
252 { | |
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253 int written, rval; |
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254 int towrite; |
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255 void* pcmbuffer; |
0 | 256 |
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257 if (!this->enabled) |
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258 { |
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259 return; |
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260 } |
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261 |
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262 towrite = this->spec.size; |
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263 pcmbuffer = pcm_buf; |
0 | 264 |
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265 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */ |
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266 do { |
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267 written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite); |
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268 if (written != towrite) |
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269 { |
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270 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) |
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271 { |
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272 /* Let a little CPU time go by and try to write again */ |
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273 SDL_Delay(1); |
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274 /* if we wrote some data */ |
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275 towrite -= written; |
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276 pcmbuffer += written * this->spec.channels; |
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277 continue; |
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278 } |
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279 else |
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280 { |
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281 if ((errno == EINVAL) || (errno == EIO)) |
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282 { |
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283 memset(&cstatus, 0, sizeof(cstatus)); |
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284 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK; |
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285 if ((rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0) |
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286 { |
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287 SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_status failed: %s\n", snd_strerror(rval)); |
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288 return; |
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289 } |
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290 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY)) |
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291 { |
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292 if ((rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0) |
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293 { |
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294 SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
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295 return; |
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|
296 } |
cbc0f7fabd1c
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297 } |
cbc0f7fabd1c
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|
298 continue; |
cbc0f7fabd1c
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299 } |
cbc0f7fabd1c
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300 else |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
301 { |
cbc0f7fabd1c
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302 return; |
cbc0f7fabd1c
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|
303 } |
cbc0f7fabd1c
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|
304 } |
cbc0f7fabd1c
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|
305 } |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
306 else |
cbc0f7fabd1c
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|
307 { |
cbc0f7fabd1c
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308 /* we wrote all remaining data */ |
cbc0f7fabd1c
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309 towrite -= written; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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310 pcmbuffer += written * this->spec.channels; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
311 } |
cbc0f7fabd1c
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312 } while ((towrite > 0) && (this->enabled)); |
0 | 313 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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314 /* If we couldn't write, assume fatal error for now */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
315 if (towrite != 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
316 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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317 this->enabled = 0; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
318 } |
cbc0f7fabd1c
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|
319 |
cbc0f7fabd1c
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320 return; |
0 | 321 } |
322 | |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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323 static Uint8* NTO_GetAudioBuf(_THIS) |
0 | 324 { |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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325 return pcm_buf; |
0 | 326 } |
327 | |
328 static void NTO_CloseAudio(_THIS) | |
329 { | |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
330 int rval; |
0 | 331 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
332 this->enabled = 0; |
0 | 333 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
334 if (audio_handle != NULL) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
335 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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336 if ((rval = snd_pcm_plugin_flush(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
337 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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338 SDL_SetError("NTO_CloseAudio(): snd_pcm_plugin_flush failed: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
339 return; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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340 } |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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341 if ((rval = snd_pcm_close(audio_handle)) < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
342 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
343 SDL_SetError("NTO_CloseAudio(): snd_pcm_close failed: %s\n",snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
344 return; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
345 } |
cbc0f7fabd1c
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346 audio_handle = NULL; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
347 } |
0 | 348 } |
349 | |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
350 static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec) |
0 | 351 { |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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352 int rval; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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353 int format; |
cbc0f7fabd1c
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354 Uint16 test_format; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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355 int found; |
0 | 356 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
357 audio_handle = NULL; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
358 this->enabled = 0; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
359 |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
360 if (pcm_buf != NULL) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
361 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
362 SDL_FreeAudioMem(pcm_buf); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
363 pcm_buf = NULL; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
364 } |
0 | 365 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
366 /* initialize channel transfer parameters to default */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
367 NTO_InitAudioParams(&cparams); |
0 | 368 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
369 /* Open the audio device */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
370 rval = snd_pcm_open_preferred(&audio_handle, &cardno, &deviceno, OPEN_FLAGS); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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changeset
|
371 if (rval < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
372 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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changeset
|
373 SDL_SetError("NTO_OpenAudio(): snd_pcm_open failed: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
374 return (-1); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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changeset
|
375 } |
0 | 376 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
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|
377 if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
378 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
379 /* enable count status parameter */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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changeset
|
380 if ((rval = snd_pcm_plugin_set_disable(audio_handle, PLUGIN_DISABLE_MMAP)) < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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663
diff
changeset
|
381 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
382 SDL_SetError("snd_pcm_plugin_set_disable failed: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
383 return (-1); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
384 } |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
385 } |
0 | 386 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
387 /* Try for a closest match on audio format */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
388 format = 0; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
389 /* can't use format as SND_PCM_SFMT_U8 = 0 in nto */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
390 found = 0; |
418
337f3ec4c385
Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
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297
diff
changeset
|
391 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
392 for (test_format=SDL_FirstAudioFormat(spec->format); !found ;) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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663
diff
changeset
|
393 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
394 /* if match found set format to equivalent ALSA format */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
395 switch (test_format) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
396 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
397 case AUDIO_U8: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
398 format = SND_PCM_SFMT_U8; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
399 found = 1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
400 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
401 case AUDIO_S8: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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663
diff
changeset
|
402 format = SND_PCM_SFMT_S8; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
403 found = 1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
404 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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663
diff
changeset
|
405 case AUDIO_S16LSB: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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663
diff
changeset
|
406 format = SND_PCM_SFMT_S16_LE; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
407 found = 1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
408 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
409 case AUDIO_S16MSB: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
410 format = SND_PCM_SFMT_S16_BE; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
411 found = 1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
412 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
413 case AUDIO_U16LSB: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
414 format = SND_PCM_SFMT_U16_LE; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
415 found = 1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
416 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
417 case AUDIO_U16MSB: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
418 format = SND_PCM_SFMT_U16_BE; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
419 found = 1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
420 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
421 default: |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
663
diff
changeset
|
422 break; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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423 } |
418
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Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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424 |
718
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425 if (!found) |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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426 { |
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427 test_format = SDL_NextAudioFormat(); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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428 } |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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429 } |
0 | 430 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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431 /* assumes test_format not 0 on success */ |
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432 if (test_format == 0) |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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433 { |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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434 SDL_SetError("NTO_OpenAudio(): Couldn't find any hardware audio formats"); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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435 return (-1); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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436 } |
0 | 437 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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438 spec->format = test_format; |
0 | 439 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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440 /* Set the audio format */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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441 cparams.format.format = format; |
0 | 442 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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443 /* Set mono or stereo audio (currently only two channels supported) */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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444 cparams.format.voices = spec->channels; |
418
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Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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445 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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446 /* Set rate */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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447 cparams.format.rate = spec->freq; |
418
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Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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448 |
718
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449 /* Setup the transfer parameters according to cparams */ |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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450 rval = snd_pcm_plugin_params(audio_handle, &cparams); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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451 if (rval < 0) |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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452 { |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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453 SDL_SetError("NTO_OpenAudio(): snd_pcm_channel_params failed: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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454 return (-1); |
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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455 } |
0 | 456 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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457 /* Make sure channel is setup right one last time */ |
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458 memset(&csetup, 0x00, sizeof(csetup)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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459 csetup.channel = SND_PCM_CHANNEL_PLAYBACK; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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460 if (snd_pcm_plugin_setup(audio_handle, &csetup) < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
461 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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462 SDL_SetError("NTO_OpenAudio(): Unable to setup playback channel\n"); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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463 return -1; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
464 } |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
465 |
418
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Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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|
466 |
718
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Date: Sat, 13 Sep 2003 15:50:43 +0300
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467 /* Calculate the final parameters for this audio specification */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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468 SDL_CalculateAudioSpec(spec); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
469 |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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470 pcm_len = spec->size; |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
471 |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
472 if (pcm_len==0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
473 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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474 pcm_len = csetup.buf.block.frag_size * spec->channels * (snd_pcm_format_width(format)/8); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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changeset
|
475 } |
0 | 476 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
477 /* Allocate memory to the audio buffer and initialize with silence (Note that |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
478 buffer size must be a multiple of fragment size, so find closest multiple) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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479 */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
480 pcm_buf = (Uint8*)SDL_AllocAudioMem(pcm_len); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
481 if (pcm_buf == NULL) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
482 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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changeset
|
483 SDL_SetError("NTO_OpenAudio(): pcm buffer allocation failed\n"); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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|
484 return (-1); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
485 } |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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|
486 memset(pcm_buf, spec->silence, pcm_len); |
0 | 487 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
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|
488 /* get the file descriptor */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
489 if ((audio_fd = snd_pcm_file_descriptor(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
490 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
491 SDL_SetError("NTO_OpenAudio(): snd_pcm_file_descriptor failed with error code: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
492 return (-1); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
493 } |
418
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Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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changeset
|
494 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
495 /* Trigger audio playback */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
496 rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
497 if (rval < 0) |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
498 { |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
499 SDL_SetError("snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval)); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
500 return (-1); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
501 } |
418
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Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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changeset
|
502 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff
changeset
|
503 this->enabled = 1; |
0 | 504 |
718
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
505 /* Get the parent process id (we're the parent of the audio thread) */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
506 parent = getpid(); |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
507 |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
508 /* We're really ready to rock and roll. :-) */ |
cbc0f7fabd1c
Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
509 return (0); |
0 | 510 } |