annotate src/audio/nto/SDL_nto_audio.c @ 1358:c71e05b4dc2e

More header massaging... works great on Windows. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 06:48:43 +0000
parents 604d73db6802
children 19418e4422cb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #include <errno.h>
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24 #include <unistd.h>
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25 #include <fcntl.h>
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26 #include <signal.h>
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27 #include <sys/types.h>
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28 #include <sys/time.h>
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29 #include <sched.h>
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30 #include <sys/select.h>
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31 #include <sys/neutrino.h>
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32 #include <sys/asoundlib.h>
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33
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34 #include "SDL_timer.h"
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35 #include "SDL_audio.h"
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36 #include "SDL_audiomem.h"
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37 #include "SDL_audio_c.h"
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38 #include "SDL_nto_audio.h"
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39
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40 /* The tag name used by NTO audio */
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41 #define DRIVER_NAME "qsa-nto"
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42
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43 /* default channel communication parameters */
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44 #define DEFAULT_CPARAMS_RATE 22050
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45 #define DEFAULT_CPARAMS_VOICES 1
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46 /* FIXME: need to add in the near future flexible logic with frag_size and frags count */
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47 #define DEFAULT_CPARAMS_FRAG_SIZE 4096
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48 #define DEFAULT_CPARAMS_FRAGS_MIN 1
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49 #define DEFAULT_CPARAMS_FRAGS_MAX 1
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50
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51 /* Open the audio device for playback, and don't block if busy */
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52 #define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK
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53
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54 #define QSA_NO_WORKAROUNDS 0x00000000
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55 #define QSA_MMAP_WORKAROUND 0x00000001
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56
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57 struct BuggyCards
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58 {
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59 char* cardname;
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60 unsigned long bugtype;
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61 };
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62
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63 #define QSA_WA_CARDS 3
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64
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65 struct BuggyCards buggycards[QSA_WA_CARDS]=
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66 {
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67 {"Sound Blaster Live!", QSA_MMAP_WORKAROUND},
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68 {"Vortex 8820", QSA_MMAP_WORKAROUND},
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69 {"Vortex 8830", QSA_MMAP_WORKAROUND},
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70 };
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71
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72 /* Audio driver functions */
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73 static void NTO_ThreadInit(_THIS);
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74 static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec);
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75 static void NTO_WaitAudio(_THIS);
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76 static void NTO_PlayAudio(_THIS);
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77 static Uint8* NTO_GetAudioBuf(_THIS);
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78 static void NTO_CloseAudio(_THIS);
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79
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80 /* card names check to apply the workarounds */
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81 static int NTO_CheckBuggyCards(_THIS, unsigned long checkfor)
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82 {
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83 char scardname[33];
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84 int it;
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85
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86 if (snd_card_get_name(cardno, scardname, 32)<0)
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87 {
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88 return 0;
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89 }
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90
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91 for (it=0; it<QSA_WA_CARDS; it++)
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92 {
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93 if (SDL_strcmp(buggycards[it].cardname, scardname)==0)
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94 {
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95 if (buggycards[it].bugtype==checkfor)
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96 {
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97 return 1;
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98 }
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99 }
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100 }
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101
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102 return 0;
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103 }
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104
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105 static void NTO_ThreadInit(_THIS)
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106 {
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107 int status;
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108 struct sched_param param;
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109
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110 /* increasing default 10 priority to 25 to avoid jerky sound */
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111 status=SchedGet(0, 0, &param);
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112 param.sched_priority=param.sched_curpriority+15;
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113 status=SchedSet(0, 0, SCHED_NOCHANGE, &param);
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114 }
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115
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116 /* PCM transfer channel parameters initialize function */
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117 static void NTO_InitAudioParams(snd_pcm_channel_params_t* cpars)
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118 {
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119 SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t));
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120
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121 cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
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122 cpars->mode = SND_PCM_MODE_BLOCK;
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123 cpars->start_mode = SND_PCM_START_DATA;
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124 cpars->stop_mode = SND_PCM_STOP_STOP;
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125 cpars->format.format = SND_PCM_SFMT_S16_LE;
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126 cpars->format.interleave = 1;
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127 cpars->format.rate = DEFAULT_CPARAMS_RATE;
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128 cpars->format.voices = DEFAULT_CPARAMS_VOICES;
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129 cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
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130 cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
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131 cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
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132 }
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133
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134 static int NTO_AudioAvailable(void)
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135 {
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136 /* See if we can open a nonblocking channel.
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137 Return value '1' means we can.
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138 Return value '0' means we cannot. */
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139
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140 int available;
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141 int rval;
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142 snd_pcm_t* handle;
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143
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144 available = 0;
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145 handle = NULL;
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146
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147 rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS);
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148
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149 if (rval >= 0)
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150 {
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151 available = 1;
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152
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153 if ((rval = snd_pcm_close(handle)) < 0)
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154 {
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155 SDL_SetError("NTO_AudioAvailable(): snd_pcm_close failed: %s\n", snd_strerror(rval));
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156 available = 0;
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157 }
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158 }
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159 else
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160 {
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161 SDL_SetError("NTO_AudioAvailable(): there are no available audio devices.\n");
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162 }
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163
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164 return (available);
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165 }
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166
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167 static void NTO_DeleteAudioDevice(SDL_AudioDevice *device)
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168 {
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169 if ((device)&&(device->hidden))
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170 {
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171 SDL_free(device->hidden);
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172 }
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173 if (device)
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174 {
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175 SDL_free(device);
718
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176 }
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177 }
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178
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179 static SDL_AudioDevice* NTO_CreateAudioDevice(int devindex)
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180 {
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181 SDL_AudioDevice *this;
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182
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183 /* Initialize all variables that we clean on shutdown */
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184 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
718
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185 if (this)
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186 {
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187 SDL_memset(this, 0, sizeof(SDL_AudioDevice));
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188 this->hidden = (struct SDL_PrivateAudioData *)SDL_malloc(sizeof(struct SDL_PrivateAudioData));
718
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189 }
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190 if ((this == NULL) || (this->hidden == NULL))
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191 {
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192 SDL_OutOfMemory();
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193 if (this)
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194 {
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195 SDL_free(this);
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196 }
718
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197 return (0);
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198 }
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199 SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData));
718
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200 audio_handle = NULL;
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201
718
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202 /* Set the function pointers */
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203 this->ThreadInit = NTO_ThreadInit;
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204 this->OpenAudio = NTO_OpenAudio;
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205 this->WaitAudio = NTO_WaitAudio;
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206 this->PlayAudio = NTO_PlayAudio;
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207 this->GetAudioBuf = NTO_GetAudioBuf;
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208 this->CloseAudio = NTO_CloseAudio;
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209
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210 this->free = NTO_DeleteAudioDevice;
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211
718
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212 return this;
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213 }
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diff changeset
214
718
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diff changeset
215 AudioBootStrap QNXNTOAUDIO_bootstrap =
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216 {
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217 DRIVER_NAME, "QNX6 QSA-NTO Audio",
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218 NTO_AudioAvailable,
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219 NTO_CreateAudioDevice
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220 };
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diff changeset
221
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diff changeset
222 /* This function waits until it is possible to write a full sound buffer */
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diff changeset
223 static void NTO_WaitAudio(_THIS)
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diff changeset
224 {
718
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diff changeset
225 fd_set wfds;
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diff changeset
226 int selectret;
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diff changeset
227
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diff changeset
228 FD_ZERO(&wfds);
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229 FD_SET(audio_fd, &wfds);
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230
718
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diff changeset
231 do {
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232 selectret=select(audio_fd + 1, NULL, &wfds, NULL, NULL);
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diff changeset
233 switch (selectret)
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diff changeset
234 {
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diff changeset
235 case -1:
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236 case 0: SDL_SetError("NTO_WaitAudio(): select() failed: %s\n", strerror(errno));
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diff changeset
237 return;
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diff changeset
238 default: if (FD_ISSET(audio_fd, &wfds))
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diff changeset
239 {
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diff changeset
240 return;
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diff changeset
241 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
242 break;
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diff changeset
243 }
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diff changeset
244 } while(1);
0
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diff changeset
245 }
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diff changeset
246
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diff changeset
247 static void NTO_PlayAudio(_THIS)
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diff changeset
248 {
718
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diff changeset
249 int written, rval;
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diff changeset
250 int towrite;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
251 void* pcmbuffer;
0
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diff changeset
252
718
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diff changeset
253 if (!this->enabled)
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diff changeset
254 {
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diff changeset
255 return;
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diff changeset
256 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
257
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diff changeset
258 towrite = this->spec.size;
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diff changeset
259 pcmbuffer = pcm_buf;
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diff changeset
260
718
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diff changeset
261 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */
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diff changeset
262 do {
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diff changeset
263 written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite);
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diff changeset
264 if (written != towrite)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
265 {
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diff changeset
266 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
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diff changeset
267 {
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diff changeset
268 /* Let a little CPU time go by and try to write again */
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diff changeset
269 SDL_Delay(1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
270 /* if we wrote some data */
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diff changeset
271 towrite -= written;
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diff changeset
272 pcmbuffer += written * this->spec.channels;
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diff changeset
273 continue;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
274 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
275 else
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
276 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
277 if ((errno == EINVAL) || (errno == EIO))
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
278 {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
279 SDL_memset(&cstatus, 0, sizeof(cstatus));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
280 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
281 if ((rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
282 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
283 SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_status failed: %s\n", snd_strerror(rval));
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
284 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
285 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
286 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY))
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
287 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
288 if ((rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
289 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
290 SDL_SetError("NTO_PlayAudio(): 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>
parents: 663
diff changeset
291 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
292 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
293 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
294 continue;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
295 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
296 else
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
297 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
298 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
299 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
300 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
301 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
302 else
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
303 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
304 /* we wrote all remaining data */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
305 towrite -= written;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
306 pcmbuffer += written * this->spec.channels;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
307 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
308 } while ((towrite > 0) && (this->enabled));
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
310 /* If we couldn't write, assume fatal error for now */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
311 if (towrite != 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
312 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
313 this->enabled = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
314 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
315
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
316 return;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
319 static Uint8* NTO_GetAudioBuf(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
321 return pcm_buf;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 static void NTO_CloseAudio(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
326 int rval;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
328 this->enabled = 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
330 if (audio_handle != NULL)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
331 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
332 if ((rval = snd_pcm_plugin_flush(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
333 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
334 SDL_SetError("NTO_CloseAudio(): snd_pcm_plugin_flush failed: %s\n", snd_strerror(rval));
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
335 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
336 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
337 if ((rval = snd_pcm_close(audio_handle)) < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
338 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
339 SDL_SetError("NTO_CloseAudio(): snd_pcm_close failed: %s\n",snd_strerror(rval));
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
340 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
341 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
342 audio_handle = NULL;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
343 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
346 static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
348 int rval;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
349 int format;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
350 Uint16 test_format;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
351 int found;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
353 audio_handle = NULL;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
354 this->enabled = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
355
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
356 if (pcm_buf != NULL)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
357 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
358 SDL_FreeAudioMem(pcm_buf);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
359 pcm_buf = NULL;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
360 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
362 /* initialize channel transfer parameters to default */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
363 NTO_InitAudioParams(&cparams);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
365 /* Open the audio device */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
366 rval = snd_pcm_open_preferred(&audio_handle, &cardno, &deviceno, OPEN_FLAGS);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
367 if (rval < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
368 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
369 SDL_SetError("NTO_OpenAudio(): snd_pcm_open failed: %s\n", snd_strerror(rval));
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
370 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
371 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
373 if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND))
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
374 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
375 /* enable count status parameter */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
376 if ((rval = snd_pcm_plugin_set_disable(audio_handle, PLUGIN_DISABLE_MMAP)) < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
377 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
378 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>
parents: 663
diff changeset
379 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
380 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
381 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
383 /* Try for a closest match on audio format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
384 format = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
385 /* 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
386 found = 0;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
387
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
388 for (test_format=SDL_FirstAudioFormat(spec->format); !found ;)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
389 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
390 /* if match found set format to equivalent ALSA format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
391 switch (test_format)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
392 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
393 case AUDIO_U8:
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
394 format = SND_PCM_SFMT_U8;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
395 found = 1;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
396 break;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
397 case AUDIO_S8:
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
398 format = SND_PCM_SFMT_S8;
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_S16LSB:
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
402 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
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>
parents: 663
diff changeset
405 case AUDIO_S16MSB:
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
406 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
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_U16LSB:
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
410 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
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_U16MSB:
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_BE;
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 default:
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
418 break;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
419 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
420
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
421 if (!found)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
422 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
423 test_format = SDL_NextAudioFormat();
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
424 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
425 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
427 /* assumes test_format not 0 on success */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
428 if (test_format == 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
429 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
430 SDL_SetError("NTO_OpenAudio(): Couldn't find any hardware audio formats");
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
431 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
432 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
434 spec->format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
436 /* Set the audio format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
437 cparams.format.format = format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
439 /* Set mono or stereo audio (currently only two channels supported) */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
440 cparams.format.voices = spec->channels;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
441
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
442 /* Set rate */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
443 cparams.format.rate = spec->freq;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
444
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
445 /* Setup the transfer parameters according to cparams */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
446 rval = snd_pcm_plugin_params(audio_handle, &cparams);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
447 if (rval < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
448 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
449 SDL_SetError("NTO_OpenAudio(): snd_pcm_channel_params failed: %s\n", snd_strerror(rval));
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
450 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
451 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
453 /* Make sure channel is setup right one last time */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
454 SDL_memset(&csetup, 0x00, sizeof(csetup));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
455 csetup.channel = SND_PCM_CHANNEL_PLAYBACK;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
456 if (snd_pcm_plugin_setup(audio_handle, &csetup) < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
457 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
458 SDL_SetError("NTO_OpenAudio(): Unable to setup playback channel\n");
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
459 return -1;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
460 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
461
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
462
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
463 /* Calculate the final parameters for this audio specification */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
464 SDL_CalculateAudioSpec(spec);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
465
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
466 pcm_len = spec->size;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
467
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
468 if (pcm_len==0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
469 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
470 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
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
471 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
473 /* Allocate memory to the audio buffer and initialize with silence (Note that
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
474 buffer size must be a multiple of fragment size, so find closest multiple)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
475 */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
476 pcm_buf = (Uint8*)SDL_AllocAudioMem(pcm_len);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
477 if (pcm_buf == NULL)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
478 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
479 SDL_SetError("NTO_OpenAudio(): pcm buffer allocation failed\n");
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
480 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
481 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
482 SDL_memset(pcm_buf, spec->silence, pcm_len);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
484 /* get the file descriptor */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
485 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>
parents: 663
diff changeset
486 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
487 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
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
488 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
489 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
490
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
491 /* Trigger audio playback */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
492 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>
parents: 663
diff changeset
493 if (rval < 0)
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
494 {
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
495 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>
parents: 663
diff changeset
496 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
497 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
498
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
499 this->enabled = 1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
501 /* 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>
parents: 663
diff changeset
502 parent = getpid();
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
503
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
504 /* We're really ready to rock and roll. :-) */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
505 return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 }