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annotate src/audio/nto/SDL_nto_audio.c @ 2339:689849465d3d gsoc2008_iphone

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author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Fri, 11 Jul 2008 00:29:18 +0000
parents 866052b01ee5
children e27bdcc80744
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 #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
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73 static inline void
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74 NTO_SetError(const char *fn, int rval)
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75 {
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76 SDL_SetError("NTO: %s failed: %s", fn, snd_strerror(rval));
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77 }
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78
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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(this->hidden->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 struct sched_param param;
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106 int status = SchedGet(0, 0, &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 param.sched_priority = param.sched_curpriority + 15;
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110 status = SchedSet(0, 0, SCHED_NOCHANGE, &param);
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111 }
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112
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113 /* PCM transfer channel parameters initialize function */
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114 static void
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115 NTO_InitAudioParams(snd_pcm_channel_params_t * cpars)
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116 {
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117 SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t));
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118
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119 cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
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120 cpars->mode = SND_PCM_MODE_BLOCK;
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121 cpars->start_mode = SND_PCM_START_DATA;
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122 cpars->stop_mode = SND_PCM_STOP_STOP;
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123 cpars->format.format = SND_PCM_SFMT_S16_LE;
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124 cpars->format.interleave = 1;
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125 cpars->format.rate = DEFAULT_CPARAMS_RATE;
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126 cpars->format.voices = DEFAULT_CPARAMS_VOICES;
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127 cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
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128 cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
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129 cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
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130 }
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131
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132
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133 /* This function waits until it is possible to write a full sound buffer */
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134 static void
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135 NTO_WaitDevice(_THIS)
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136 {
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137 fd_set wfds;
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138 int selectret;
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139
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140 FD_ZERO(&wfds);
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141 FD_SET(this->hidden->audio_fd, &wfds);
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142
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143 do {
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144 selectret =
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145 select(this->hidden->audio_fd + 1, NULL, &wfds, NULL, NULL);
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146 switch (selectret) {
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147 case -1:
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148 case 0:
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149 SDL_SetError("NTO: select() failed: %s\n", strerror(errno));
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150 return;
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151 default:
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152 if (FD_ISSET(this->hidden->audio_fd, &wfds)) {
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153 return;
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154 }
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155 break;
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156 }
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157 }
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158 while (1);
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159 }
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160
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161 static void
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162 NTO_PlayDevice(_THIS)
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163 {
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164 snd_pcm_channel_status_t cstatus;
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165 int written, rval;
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166 int towrite;
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167 void *pcmbuffer;
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168
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169 if ((!this->enabled) || (!this->hidden)) {
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170 return;
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171 }
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172
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173 towrite = this->spec.size;
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174 pcmbuffer = this->hidden->pcm_buf;
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175
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176 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */
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177 do {
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178 written = snd_pcm_plugin_write(this->hidden->audio_handle,
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179 pcmbuffer, towrite);
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180 if (written != towrite) {
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181 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
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182 /* Let a little CPU time go by and try to write again */
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183 SDL_Delay(1);
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184 /* if we wrote some data */
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185 towrite -= written;
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186 pcmbuffer += written * this->spec.channels;
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187 continue;
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188 } else if ((errno == EINVAL) || (errno == EIO)) {
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189 SDL_memset(&cstatus, 0, sizeof(cstatus));
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190 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
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191 rval = snd_pcm_plugin_status(this->hidden->audio_handle,
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192 &cstatus);
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193 if (rval < 0) {
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194 NTO_SetError("snd_pcm_plugin_status", rval);
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195 return;
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196 }
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197
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198 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) ||
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199 (cstatus.status == SND_PCM_STATUS_READY)) {
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200 rval = snd_pcm_plugin_prepare(this->hidden->audio_handle,
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201 SND_PCM_CHANNEL_PLAYBACK);
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202 if (rval < 0) {
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203 NTO_SetError("snd_pcm_plugin_prepare", rval);
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204 return;
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205 }
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206 }
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207 continue;
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208 } else {
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209 return;
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210 }
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211 } else {
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212 /* we wrote all remaining data */
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213 towrite -= written;
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214 pcmbuffer += written * this->spec.channels;
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215 }
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216 }
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217 while ((towrite > 0) && (this->enabled));
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218
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219 /* If we couldn't write, assume fatal error for now */
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220 if (towrite != 0) {
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221 this->enabled = 0;
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222 }
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223 }
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224
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225 static Uint8 *
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226 NTO_GetDeviceBuf(_THIS)
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227 {
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228 return this->hidden->pcm_buf;
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229 }
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230
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231 static void
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232 NTO_CloseDevice(_THIS)
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233 {
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234 if (this->hidden != NULL) {
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235 if (this->hidden->audio_handle != NULL) {
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236 snd_pcm_plugin_flush(this->hidden->audio_handle,
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237 SND_PCM_CHANNEL_PLAYBACK);
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238 snd_pcm_close(this->hidden->audio_handle);
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239 this->hidden->audio_handle = NULL;
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240 }
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241 if (this->hidden->pcm_buf != NULL) {
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242 SDL_FreeAudioMem(this->hidden->pcm_buf);
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243 this->hidden->pcm_buf = NULL;
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244 }
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245 SDL_free(this->hidden);
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246 this->hidden = NULL;
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247 }
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248 }
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249
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250 static int
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251 NTO_OpenDevice(_THIS, const char *devname, int iscapture)
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252 {
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diff changeset
253 int rval = 0;
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254 int format = 0;
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255 SDL_AudioFormat test_format = 0;
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256 int found = 0;
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diff changeset
257 snd_pcm_channel_setup_t csetup;
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diff changeset
258 snd_pcm_channel_params_t cparams;
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259
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260 /* Initialize all variables that we clean on shutdown */
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diff changeset
261 this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
262 SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
263 if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
264 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
265 return 0;
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
266 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
267 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
269 /* 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
270 NTO_InitAudioParams(&cparams);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
272 /* Open the audio device */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
273 rval = snd_pcm_open_preferred(&this->hidden->audio_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
274 &this->hidden->cardno,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
275 &this->hidden->deviceno, OPEN_FLAGS);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
276
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
277 if (rval < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
278 NTO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
279 NTO_SetError("snd_pcm_open", rval);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
280 return 0;
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
281 }
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
283 if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) {
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
284 /* enable count status parameter */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
285 rval = snd_pcm_plugin_set_disable(this->hidden->audio_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
286 PLUGIN_DISABLE_MMAP);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
287 if (rval < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
288 NTO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
289 NTO_SetError("snd_pcm_plugin_set_disable", rval);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
290 return 0;
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
291 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
292 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
294 /* 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
295 format = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
296 /* 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
297 found = 0;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
298
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
299 for (test_format = SDL_FirstAudioFormat(this->spec.format); !found;) {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
300 /* if match found set format to equivalent ALSA format */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
301 switch (test_format) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
302 case AUDIO_U8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
303 format = SND_PCM_SFMT_U8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
304 found = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
305 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
306 case AUDIO_S8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
307 format = SND_PCM_SFMT_S8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
308 found = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
309 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
310 case AUDIO_S16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
311 format = SND_PCM_SFMT_S16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
312 found = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
313 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
314 case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
315 format = SND_PCM_SFMT_S16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
316 found = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
317 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
318 case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
319 format = SND_PCM_SFMT_U16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
320 found = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
321 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
322 case AUDIO_U16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
323 format = SND_PCM_SFMT_U16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
324 found = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
325 break;
2007
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
326 case AUDIO_S32LSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
327 format = SND_PCM_SFMT_S32_LE;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
328 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
329 break;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
330 case AUDIO_S32MSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
331 format = SND_PCM_SFMT_S32_BE;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
332 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
333 break;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
334 case AUDIO_F32LSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
335 format = SND_PCM_SFMT_FLOAT_LE;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
336 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
337 break;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
338 case AUDIO_F32MSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
339 format = SND_PCM_SFMT_FLOAT_BE;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
340 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
341 break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
342 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
343 break;
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
344 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
345
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
346 if (!found) {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
347 test_format = SDL_NextAudioFormat();
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
348 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
349 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
351 /* assumes test_format not 0 on success */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
352 if (test_format == 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
353 NTO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
354 SDL_SetError("NTO: Couldn't find any hardware audio formats");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
355 return 0;
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
356 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
358 this->spec.format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
360 /* Set the audio format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
361 cparams.format.format = format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
363 /* Set mono or stereo audio (currently only two channels supported) */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
364 cparams.format.voices = this->spec.channels;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
365
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
366 /* Set rate */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
367 cparams.format.rate = this->spec.freq;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
368
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
369 /* Setup the transfer parameters according to cparams */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
370 rval = snd_pcm_plugin_params(this->hidden->audio_handle, &cparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
371 if (rval < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
372 NTO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
373 NTO_SetError("snd_pcm_channel_params", rval);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
374 return 0;
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
375 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
377 /* Make sure channel is setup right one last time */
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
378 SDL_memset(&csetup, '\0', sizeof(csetup));
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
379 csetup.channel = SND_PCM_CHANNEL_PLAYBACK;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
380 if (snd_pcm_plugin_setup(this->hidden->audio_handle, &csetup) < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
381 NTO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
382 SDL_SetError("NTO: Unable to setup playback channel\n");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
383 return 0;
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
384 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
385
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386 /* Calculate the final parameters for this audio specification */
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387 SDL_CalculateAudioSpec(&this->spec);
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388
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389 this->hidden->pcm_len = this->spec.size;
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390
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391 if (this->hidden->pcm_len == 0) {
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392 this->hidden->pcm_len =
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393 csetup.buf.block.frag_size * this->spec.channels *
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394 (snd_pcm_format_width(format) / 8);
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395 }
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396
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397 /*
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398 * Allocate memory to the audio buffer and initialize with silence
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399 * (Note that buffer size must be a multiple of fragment size, so find
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400 * closest multiple)
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401 */
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402 this->hidden->pcm_buf =
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403 (Uint8 *) SDL_AllocAudioMem(this->hidden->pcm_len);
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404 if (this->hidden->pcm_buf == NULL) {
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405 NTO_CloseDevice(this);
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406 SDL_OutOfMemory();
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407 return 0;
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408 }
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409 SDL_memset(this->hidden->pcm_buf, this->spec.silence,
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410 this->hidden->pcm_len);
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411
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412 /* get the file descriptor */
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413 this->hidden->audio_fd =
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414 snd_pcm_file_descriptor(this->hidden->audio_handle,
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415 SND_PCM_CHANNEL_PLAYBACK);
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416 if (this->hidden->audio_fd < 0) {
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417 NTO_CloseDevice(this);
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418 NTO_SetError("snd_pcm_file_descriptor", rval);
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419 return 0;
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420 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
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421
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422 /* Trigger audio playback */
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423 rval = snd_pcm_plugin_prepare(this->hidden->audio_handle,
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424 SND_PCM_CHANNEL_PLAYBACK);
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425 if (rval < 0) {
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426 NTO_CloseDevice(this);
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427 NTO_SetError("snd_pcm_plugin_prepare", rval);
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428 return 0;
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429 }
418
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430
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431 /* We're really ready to rock and roll. :-) */
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432 return 1;
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433 }
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434
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435
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436 static int
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437 NTO_Init(SDL_AudioDriverImpl * impl)
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438 {
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diff changeset
439 /* See if we can open a nonblocking channel. */
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440 snd_pcm_t *handle = NULL;
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441 int rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS);
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442 if (rval < 0) {
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443 SDL_SetError("NTO: couldn't open preferred audio device");
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444 return 0;
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445 }
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diff changeset
446 if ((rval = snd_pcm_close(handle)) < 0) {
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447 SDL_SetError("NTO: couldn't close test audio device");
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448 return 0;
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449 }
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450
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451 /* Set the function pointers */
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452 impl->OpenDevice = NTO_OpenDevice;
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453 impl->ThreadInit = NTO_ThreadInit;
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454 impl->WaitDevice = NTO_WaitDevice;
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455 impl->PlayDevice = NTO_PlayDevice;
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456 impl->GetDeviceBuf = NTO_GetDeviceBuf;
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457 impl->CloseDevice = NTO_CloseDevice;
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458 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: add device enum! */
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459
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460 return 1;
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461 }
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462
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diff changeset
463 AudioBootStrap QNXNTOAUDIO_bootstrap = {
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diff changeset
464 DRIVER_NAME, "QNX6 QSA-NTO Audio", NTO_Init, 0
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465 };
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diff changeset
466
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467 /* vi: set ts=4 sw=4 expandtab: */