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annotate src/audio/nto/SDL_nto_audio.c @ 1668:4da1ee79c9af SDL-1.3

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more tweaking indent options
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 04:04:35 +0000
parents 782fd950bd46
children
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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 #include "SDL_config.h"
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23
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24 #include <errno.h>
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25 #include <unistd.h>
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26 #include <fcntl.h>
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27 #include <signal.h>
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28 #include <sys/types.h>
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29 #include <sys/time.h>
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30 #include <sched.h>
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31 #include <sys/select.h>
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32 #include <sys/neutrino.h>
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33 #include <sys/asoundlib.h>
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34
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35 #include "SDL_timer.h"
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36 #include "SDL_audio.h"
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37 #include "../SDL_audiomem.h"
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38 #include "../SDL_audio_c.h"
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39 #include "SDL_nto_audio.h"
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40
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41 /* The tag name used by NTO audio */
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42 #define DRIVER_NAME "qsa-nto"
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43
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44 /* default channel communication parameters */
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45 #define DEFAULT_CPARAMS_RATE 22050
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46 #define DEFAULT_CPARAMS_VOICES 1
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47 /* FIXME: need to add in the near future flexible logic with frag_size and frags count */
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48 #define DEFAULT_CPARAMS_FRAG_SIZE 4096
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49 #define DEFAULT_CPARAMS_FRAGS_MIN 1
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50 #define DEFAULT_CPARAMS_FRAGS_MAX 1
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51
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52 /* Open the audio device for playback, and don't block if busy */
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53 #define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK
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54
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55 #define QSA_NO_WORKAROUNDS 0x00000000
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56 #define QSA_MMAP_WORKAROUND 0x00000001
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57
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58 struct BuggyCards
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59 {
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60 char *cardname;
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61 unsigned long bugtype;
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62 };
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63
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64 #define QSA_WA_CARDS 3
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65
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66 struct BuggyCards buggycards[QSA_WA_CARDS] = {
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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
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82 NTO_CheckBuggyCards(_THIS, unsigned long checkfor)
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83 {
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84 char scardname[33];
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85 int it;
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86
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87 if (snd_card_get_name(cardno, scardname, 32) < 0) {
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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 if (SDL_strcmp(buggycards[it].cardname, scardname) == 0) {
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93 if (buggycards[it].bugtype == checkfor) {
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94 return 1;
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95 }
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96 }
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97 }
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98
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99 return 0;
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100 }
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101
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102 static void
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103 NTO_ThreadInit(_THIS)
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104 {
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105 int status;
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106 struct sched_param param;
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107
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108 /* increasing default 10 priority to 25 to avoid jerky sound */
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109 status = SchedGet(0, 0, &param);
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110 param.sched_priority = param.sched_curpriority + 15;
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111 status = SchedSet(0, 0, SCHED_NOCHANGE, &param);
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112 }
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113
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114 /* PCM transfer channel parameters initialize function */
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115 static void
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116 NTO_InitAudioParams(snd_pcm_channel_params_t * cpars)
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117 {
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118 SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t));
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119
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120 cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
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121 cpars->mode = SND_PCM_MODE_BLOCK;
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122 cpars->start_mode = SND_PCM_START_DATA;
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123 cpars->stop_mode = SND_PCM_STOP_STOP;
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124 cpars->format.format = SND_PCM_SFMT_S16_LE;
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125 cpars->format.interleave = 1;
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126 cpars->format.rate = DEFAULT_CPARAMS_RATE;
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127 cpars->format.voices = DEFAULT_CPARAMS_VOICES;
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128 cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
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129 cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
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130 cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
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131 }
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132
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133 static int
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134 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 available = 1;
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151
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152 if ((rval = snd_pcm_close(handle)) < 0) {
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153 SDL_SetError
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154 ("NTO_AudioAvailable(): snd_pcm_close failed: %s\n",
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155 snd_strerror(rval));
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156 available = 0;
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157 }
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158 } else {
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159 SDL_SetError
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160 ("NTO_AudioAvailable(): there are no available audio devices.\n");
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161 }
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162
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163 return (available);
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164 }
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165
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166 static void
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167 NTO_DeleteAudioDevice(SDL_AudioDevice * device)
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168 {
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169 if ((device) && (device->hidden)) {
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170 SDL_free(device->hidden);
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171 }
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172 if (device) {
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173 SDL_free(device);
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174 }
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175 }
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176
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177 static SDL_AudioDevice *
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178 NTO_CreateAudioDevice(int devindex)
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179 {
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180 SDL_AudioDevice *this;
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181
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182 /* Initialize all variables that we clean on shutdown */
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183 this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
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184 if (this) {
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185 SDL_memset(this, 0, sizeof(SDL_AudioDevice));
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186 this->hidden = (struct SDL_PrivateAudioData *)
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187 SDL_malloc(sizeof(struct SDL_PrivateAudioData));
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188 }
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189 if ((this == NULL) || (this->hidden == NULL)) {
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190 SDL_OutOfMemory();
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191 if (this) {
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192 SDL_free(this);
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193 }
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194 return (0);
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195 }
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196 SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData));
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197 audio_handle = NULL;
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198
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199 /* Set the function pointers */
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200 this->ThreadInit = NTO_ThreadInit;
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201 this->OpenAudio = NTO_OpenAudio;
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202 this->WaitAudio = NTO_WaitAudio;
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203 this->PlayAudio = NTO_PlayAudio;
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204 this->GetAudioBuf = NTO_GetAudioBuf;
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205 this->CloseAudio = NTO_CloseAudio;
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206
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207 this->free = NTO_DeleteAudioDevice;
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208
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209 return this;
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210 }
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211
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212 AudioBootStrap QNXNTOAUDIO_bootstrap = {
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213 DRIVER_NAME, "QNX6 QSA-NTO Audio",
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214 NTO_AudioAvailable,
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215 NTO_CreateAudioDevice
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216 };
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217
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218 /* This function waits until it is possible to write a full sound buffer */
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219 static void
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220 NTO_WaitAudio(_THIS)
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221 {
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222 fd_set wfds;
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223 int selectret;
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224
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225 FD_ZERO(&wfds);
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226 FD_SET(audio_fd, &wfds);
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227
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228 do {
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229 selectret = select(audio_fd + 1, NULL, &wfds, NULL, NULL);
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230 switch (selectret) {
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231 case -1:
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232 case 0:
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233 SDL_SetError("NTO_WaitAudio(): select() failed: %s\n",
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234 strerror(errno));
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235 return;
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236 default:
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237 if (FD_ISSET(audio_fd, &wfds)) {
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238 return;
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239 }
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240 break;
718
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241 }
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242 }
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243 while (1);
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244 }
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245
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246 static void
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247 NTO_PlayAudio(_THIS)
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248 {
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249 int written, rval;
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250 int towrite;
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251 void *pcmbuffer;
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252
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253 if (!this->enabled) {
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254 return;
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255 }
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256
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257 towrite = this->spec.size;
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258 pcmbuffer = pcm_buf;
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259
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260 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */
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261 do {
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262 written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite);
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263 if (written != towrite) {
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264 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
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265 /* Let a little CPU time go by and try to write again */
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266 SDL_Delay(1);
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267 /* if we wrote some data */
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268 towrite -= written;
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269 pcmbuffer += written * this->spec.channels;
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270 continue;
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271 } else {
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272 if ((errno == EINVAL) || (errno == EIO)) {
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273 SDL_memset(&cstatus, 0, sizeof(cstatus));
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274 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
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275 if ((rval =
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276 snd_pcm_plugin_status(audio_handle, &cstatus)) < 0) {
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277 SDL_SetError
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278 ("NTO_PlayAudio(): snd_pcm_plugin_status failed: %s\n",
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279 snd_strerror(rval));
718
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280 return;
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281 }
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282 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN)
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283 || (cstatus.status == SND_PCM_STATUS_READY)) {
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284 if ((rval =
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285 snd_pcm_plugin_prepare(audio_handle,
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286 SND_PCM_CHANNEL_PLAYBACK))
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287 < 0) {
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288 SDL_SetError
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289 ("NTO_PlayAudio(): snd_pcm_plugin_prepare failed: %s\n",
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290 snd_strerror(rval));
718
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291 return;
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292 }
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293 }
718
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294 continue;
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295 } else {
718
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296 return;
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diff changeset
297 }
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298 }
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299 } else {
718
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300 /* we wrote all remaining data */
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301 towrite -= written;
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302 pcmbuffer += written * this->spec.channels;
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303 }
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304 }
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305 while ((towrite > 0) && (this->enabled));
0
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306
718
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diff changeset
307 /* If we couldn't write, assume fatal error for now */
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308 if (towrite != 0) {
718
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diff changeset
309 this->enabled = 0;
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diff changeset
310 }
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diff changeset
311
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
312 return;
0
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diff changeset
313 }
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314
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diff changeset
315 static Uint8 *
1668
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diff changeset
316 NTO_GetAudioBuf(_THIS)
0
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parents:
diff changeset
317 {
718
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diff changeset
318 return pcm_buf;
0
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parents:
diff changeset
319 }
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diff changeset
320
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321 static void
1668
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322 NTO_CloseAudio(_THIS)
0
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diff changeset
323 {
718
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diff changeset
324 int rval;
0
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diff changeset
325
718
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diff changeset
326 this->enabled = 0;
0
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diff changeset
327
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328 if (audio_handle != NULL) {
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329 if ((rval =
1668
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330 snd_pcm_plugin_flush(audio_handle,
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diff changeset
331 SND_PCM_CHANNEL_PLAYBACK)) < 0) {
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diff changeset
332 SDL_SetError
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diff changeset
333 ("NTO_CloseAudio(): snd_pcm_plugin_flush failed: %s\n",
1668
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334 snd_strerror(rval));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
335 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
336 }
1668
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337 if ((rval = snd_pcm_close(audio_handle)) < 0) {
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diff changeset
338 SDL_SetError("NTO_CloseAudio(): snd_pcm_close failed: %s\n",
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339 snd_strerror(rval));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
340 return;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
341 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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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
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parents:
diff changeset
344 }
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diff changeset
345
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diff changeset
346 static int
1668
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diff changeset
347 NTO_OpenAudio(_THIS, SDL_AudioSpec * spec)
0
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parents:
diff changeset
348 {
718
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diff changeset
349 int rval;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
350 int format;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
351 Uint16 test_format;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
352 int found;
0
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diff changeset
353
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
354 audio_handle = NULL;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
355 this->enabled = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
356
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diff changeset
357 if (pcm_buf != NULL) {
1668
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358 SDL_FreeAudioMem(pcm_buf);
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
359 pcm_buf = NULL;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
360 }
0
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diff changeset
361
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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diff changeset
362 /* initialize channel transfer parameters to default */
1668
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diff changeset
363 NTO_InitAudioParams(&cparams);
0
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parents:
diff changeset
364
718
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diff changeset
365 /* Open the audio device */
1662
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diff changeset
366 rval =
1668
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diff changeset
367 snd_pcm_open_preferred(&audio_handle, &cardno, &deviceno, OPEN_FLAGS);
1662
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diff changeset
368 if (rval < 0) {
1668
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diff changeset
369 SDL_SetError("NTO_OpenAudio(): snd_pcm_open failed: %s\n",
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diff changeset
370 snd_strerror(rval));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
371 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
372 }
0
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parents:
diff changeset
373
1668
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diff changeset
374 if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
375 /* enable count status parameter */
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diff changeset
376 if ((rval =
1668
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diff changeset
377 snd_pcm_plugin_set_disable(audio_handle,
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diff changeset
378 PLUGIN_DISABLE_MMAP)) < 0) {
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diff changeset
379 SDL_SetError("snd_pcm_plugin_set_disable failed: %s\n",
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diff changeset
380 snd_strerror(rval));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
381 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
382 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
383 }
0
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parents:
diff changeset
384
718
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parents: 663
diff changeset
385 /* Try for a closest match on audio format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
386 format = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
387 /* can't use format as SND_PCM_SFMT_U8 = 0 in nto */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
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parents: 663
diff changeset
388 found = 0;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
389
1668
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diff changeset
390 for (test_format = SDL_FirstAudioFormat(spec->format); !found;) {
718
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diff changeset
391 /* if match found set format to equivalent ALSA format */
1662
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diff changeset
392 switch (test_format) {
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diff changeset
393 case AUDIO_U8:
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diff changeset
394 format = SND_PCM_SFMT_U8;
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diff changeset
395 found = 1;
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diff changeset
396 break;
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diff changeset
397 case AUDIO_S8:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
398 format = SND_PCM_SFMT_S8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
399 found = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
400 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
401 case AUDIO_S16LSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
402 format = SND_PCM_SFMT_S16_LE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
403 found = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
404 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
405 case AUDIO_S16MSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
406 format = SND_PCM_SFMT_S16_BE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
407 found = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
408 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
409 case AUDIO_U16LSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
410 format = SND_PCM_SFMT_U16_LE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
411 found = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
412 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
413 case AUDIO_U16MSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
414 format = SND_PCM_SFMT_U16_BE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
415 found = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
416 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
417 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
418 break;
718
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
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
421 if (!found) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
422 test_format = SDL_NextAudioFormat();
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
423 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
424 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
426 /* assumes test_format not 0 on success */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
427 if (test_format == 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
428 SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
429 ("NTO_OpenAudio(): Couldn't find any hardware audio formats");
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
430 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
431 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
433 spec->format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
435 /* Set the audio format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
436 cparams.format.format = format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
438 /* 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
439 cparams.format.voices = spec->channels;
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
440
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
441 /* Set rate */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
442 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
443
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
444 /* Setup the transfer parameters according to cparams */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
445 rval = snd_pcm_plugin_params(audio_handle, &cparams);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
446 if (rval < 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
447 SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
448 ("NTO_OpenAudio(): snd_pcm_channel_params failed: %s\n",
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
449 snd_strerror(rval));
718
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 */
1668
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Sam Lantinga <slouken@libsdl.org>
parents: 1662
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;
1668
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Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
456 if (snd_pcm_plugin_setup(audio_handle, &csetup) < 0) {
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
457 SDL_SetError("NTO_OpenAudio(): Unable to setup playback channel\n");
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
458 return -1;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
459 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
460
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
461
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
462 /* Calculate the final parameters for this audio specification */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
463 SDL_CalculateAudioSpec(spec);
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
464
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
465 pcm_len = spec->size;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
466
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
467 if (pcm_len == 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
468 pcm_len =
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
469 csetup.buf.block.frag_size * spec->channels *
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
470 (snd_pcm_format_width(format) / 8);
718
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)
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
475 */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
476 pcm_buf = (Uint8 *) SDL_AllocAudioMem(pcm_len);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
477 if (pcm_buf == NULL) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
478 SDL_SetError("NTO_OpenAudio(): pcm buffer allocation failed\n");
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
479 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
480 }
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
481 SDL_memset(pcm_buf, spec->silence, pcm_len);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
483 /* get the file descriptor */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
484 if ((audio_fd =
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
485 snd_pcm_file_descriptor(audio_handle,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
486 SND_PCM_CHANNEL_PLAYBACK)) < 0) {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
487 SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
488 ("NTO_OpenAudio(): snd_pcm_file_descriptor failed with error code: %s\n",
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
489 snd_strerror(rval));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
490 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
491 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
492
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
493 /* Trigger audio playback */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
494 rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
495 if (rval < 0) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
496 SDL_SetError("snd_pcm_plugin_prepare failed: %s\n",
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
497 snd_strerror(rval));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
498 return (-1);
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
499 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
500
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
501 this->enabled = 1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
503 /* Get the parent process id (we're the parent of the audio thread) */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
504 parent = getpid();
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
505
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
506 /* 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
507 return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
508 }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
509
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
510 /* vi: set ts=4 sw=4 expandtab: */