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annotate src/audio/nto/SDL_nto_audio.c @ 2697:c9121b04cffa gsoc2008_nds

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Some more work on the audio driver.
author Darren Alton <dalton@stevens.edu>
date Thu, 21 Aug 2008 12:38:21 +0000
parents e27bdcc80744
children 99210400e8b9
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 } while (1);
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158 }
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159
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160 static void
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161 NTO_PlayDevice(_THIS)
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162 {
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163 snd_pcm_channel_status_t cstatus;
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164 int written, rval;
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165 int towrite;
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166 void *pcmbuffer;
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167
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168 if ((!this->enabled) || (!this->hidden)) {
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169 return;
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170 }
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171
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172 towrite = this->spec.size;
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173 pcmbuffer = this->hidden->pcm_buf;
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174
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175 /* Write the audio data, checking for EAGAIN (buffer full) and underrun */
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176 do {
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177 written = snd_pcm_plugin_write(this->hidden->audio_handle,
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178 pcmbuffer, towrite);
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179 if (written != towrite) {
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180 if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
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181 /* Let a little CPU time go by and try to write again */
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182 SDL_Delay(1);
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183 /* if we wrote some data */
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184 towrite -= written;
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185 pcmbuffer += written * this->spec.channels;
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186 continue;
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187 } else if ((errno == EINVAL) || (errno == EIO)) {
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188 SDL_memset(&cstatus, 0, sizeof(cstatus));
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189 cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
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190 rval = snd_pcm_plugin_status(this->hidden->audio_handle,
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191 &cstatus);
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192 if (rval < 0) {
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193 NTO_SetError("snd_pcm_plugin_status", rval);
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194 return;
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195 }
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196
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197 if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) ||
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198 (cstatus.status == SND_PCM_STATUS_READY)) {
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199 rval = snd_pcm_plugin_prepare(this->hidden->audio_handle,
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200 SND_PCM_CHANNEL_PLAYBACK);
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201 if (rval < 0) {
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202 NTO_SetError("snd_pcm_plugin_prepare", rval);
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203 return;
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204 }
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205 }
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206 continue;
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207 } else {
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208 return;
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209 }
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210 } else {
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211 /* we wrote all remaining data */
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212 towrite -= written;
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213 pcmbuffer += written * this->spec.channels;
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214 }
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215 } while ((towrite > 0) && (this->enabled));
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216
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217 /* If we couldn't write, assume fatal error for now */
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218 if (towrite != 0) {
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219 this->enabled = 0;
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220 }
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221 }
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222
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223 static Uint8 *
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224 NTO_GetDeviceBuf(_THIS)
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225 {
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226 return this->hidden->pcm_buf;
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227 }
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228
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229 static void
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230 NTO_CloseDevice(_THIS)
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231 {
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232 if (this->hidden != NULL) {
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233 if (this->hidden->audio_handle != NULL) {
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234 snd_pcm_plugin_flush(this->hidden->audio_handle,
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235 SND_PCM_CHANNEL_PLAYBACK);
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236 snd_pcm_close(this->hidden->audio_handle);
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237 this->hidden->audio_handle = NULL;
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238 }
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239 if (this->hidden->pcm_buf != NULL) {
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240 SDL_FreeAudioMem(this->hidden->pcm_buf);
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241 this->hidden->pcm_buf = NULL;
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242 }
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243 SDL_free(this->hidden);
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244 this->hidden = NULL;
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245 }
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246 }
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247
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248 static int
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249 NTO_OpenDevice(_THIS, const char *devname, int iscapture)
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250 {
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251 int rval = 0;
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252 int format = 0;
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253 SDL_AudioFormat test_format = 0;
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254 int found = 0;
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diff changeset
255 snd_pcm_channel_setup_t csetup;
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diff changeset
256 snd_pcm_channel_params_t cparams;
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257
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diff changeset
258 /* Initialize all variables that we clean on shutdown */
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diff changeset
259 this->hidden = (struct SDL_PrivateAudioData *)
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260 SDL_malloc((sizeof *this->hidden));
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5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
261 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
262 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
263 return 0;
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
264 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
265 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
267 /* 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
268 NTO_InitAudioParams(&cparams);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
270 /* 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
271 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
272 &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
273 &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
274
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
275 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
276 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
277 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
278 return 0;
718
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parents: 663
diff changeset
279 }
0
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parents:
diff changeset
280
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
281 if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) {
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
282 /* 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
283 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
284 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
285 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
286 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
287 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
288 return 0;
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
289 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
290 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
292 /* 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
293 format = 0;
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
294 /* 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
295 found = 0;
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
296
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
297 for (test_format = SDL_FirstAudioFormat(this->spec.format); !found;) {
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
298 /* 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
299 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
300 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
301 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
302 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
303 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
304 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
305 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
306 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
307 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
308 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
309 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
310 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
311 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
312 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
313 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
314 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
315 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
316 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
317 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
318 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
319 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
320 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
321 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
322 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
323 break;
2007
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
324 case AUDIO_S32LSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
325 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
326 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
327 break;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
328 case AUDIO_S32MSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
329 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
330 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
331 break;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
332 case AUDIO_F32LSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
333 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
334 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
335 break;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
336 case AUDIO_F32MSB:
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
337 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
338 found = 1;
cff63f857ff3 QNX6 support for int32/float32 (isn't this just ALSA?!)
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
339 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
340 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
341 break;
718
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Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
342 }
418
337f3ec4c385 Updated the QNX audio code for QNX 6.2 (thanks Travis!)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
343
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
344 if (!found) {
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
345 test_format = SDL_NextAudioFormat();
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
346 }
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
347 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
349 /* 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
350 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
351 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
352 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
353 return 0;
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
354 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2007
diff changeset
356 this->spec.format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
358 /* Set the audio format */
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
359 cparams.format.format = format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
361 /* 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
362 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
363
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
364 /* 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
365 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
366
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
367 /* 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
368 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
369 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
370 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
371 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
372 return 0;
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
373 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374
718
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
375 /* Make sure channel is setup right one last time */
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
376 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
377 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
378 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
379 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
380 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
381 return 0;
718
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
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
383
cbc0f7fabd1c Date: Sat, 13 Sep 2003 15:50:43 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 663
diff changeset
384 /* Calculate the final parameters for this audio specification */
2049
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385 SDL_CalculateAudioSpec(&this->spec);
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386
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387 this->hidden->pcm_len = this->spec.size;
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388
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389 if (this->hidden->pcm_len == 0) {
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390 this->hidden->pcm_len =
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391 csetup.buf.block.frag_size * this->spec.channels *
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392 (snd_pcm_format_width(format) / 8);
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393 }
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394
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395 /*
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396 * Allocate memory to the audio buffer and initialize with silence
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397 * (Note that buffer size must be a multiple of fragment size, so find
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398 * closest multiple)
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399 */
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400 this->hidden->pcm_buf =
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401 (Uint8 *) SDL_AllocAudioMem(this->hidden->pcm_len);
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402 if (this->hidden->pcm_buf == NULL) {
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403 NTO_CloseDevice(this);
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404 SDL_OutOfMemory();
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405 return 0;
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406 }
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407 SDL_memset(this->hidden->pcm_buf, this->spec.silence,
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408 this->hidden->pcm_len);
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409
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410 /* get the file descriptor */
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411 this->hidden->audio_fd =
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412 snd_pcm_file_descriptor(this->hidden->audio_handle,
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413 SND_PCM_CHANNEL_PLAYBACK);
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414 if (this->hidden->audio_fd < 0) {
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415 NTO_CloseDevice(this);
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416 NTO_SetError("snd_pcm_file_descriptor", rval);
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417 return 0;
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418 }
418
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419
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420 /* Trigger audio playback */
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421 rval = snd_pcm_plugin_prepare(this->hidden->audio_handle,
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422 SND_PCM_CHANNEL_PLAYBACK);
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423 if (rval < 0) {
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424 NTO_CloseDevice(this);
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425 NTO_SetError("snd_pcm_plugin_prepare", rval);
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426 return 0;
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427 }
418
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428
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429 /* We're really ready to rock and roll. :-) */
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430 return 1;
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431 }
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432
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433
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434 static int
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435 NTO_Init(SDL_AudioDriverImpl * impl)
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436 {
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437 /* See if we can open a nonblocking channel. */
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438 snd_pcm_t *handle = NULL;
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439 int rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS);
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440 if (rval < 0) {
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441 SDL_SetError("NTO: couldn't open preferred audio device");
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442 return 0;
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443 }
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444 if ((rval = snd_pcm_close(handle)) < 0) {
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445 SDL_SetError("NTO: couldn't close test audio device");
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446 return 0;
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447 }
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448
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449 /* Set the function pointers */
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450 impl->OpenDevice = NTO_OpenDevice;
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451 impl->ThreadInit = NTO_ThreadInit;
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452 impl->WaitDevice = NTO_WaitDevice;
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453 impl->PlayDevice = NTO_PlayDevice;
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454 impl->GetDeviceBuf = NTO_GetDeviceBuf;
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455 impl->CloseDevice = NTO_CloseDevice;
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456 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: add device enum! */
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457
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458 return 1;
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459 }
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460
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diff changeset
461 AudioBootStrap QNXNTOAUDIO_bootstrap = {
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diff changeset
462 DRIVER_NAME, "QNX6 QSA-NTO Audio", NTO_Init, 0
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463 };
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464
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465 /* vi: set ts=4 sw=4 expandtab: */