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annotate src/audio/paudio/SDL_paudio.c @ 2449:4a07dc228e93 gsoc2008_iphone

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comments and trivials
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Sat, 16 Aug 2008 00:14:35 +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) 1997-2006 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Carsten Griwodz
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20 griff@kom.tu-darmstadt.de
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21
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22 based on linux/SDL_dspaudio.c by Sam Lantinga
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23 */
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24 #include "SDL_config.h"
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25
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26 /* Allow access to a raw mixing buffer */
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27
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28 #include <errno.h>
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29 #include <unistd.h>
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30 #include <fcntl.h>
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31 #include <sys/time.h>
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32 #include <sys/ioctl.h>
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33 #include <sys/types.h>
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34 #include <sys/stat.h>
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35
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36 #include "SDL_timer.h"
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37 #include "SDL_audio.h"
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38 #include "SDL_stdinc.h"
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39 #include "../SDL_audiomem.h"
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40 #include "../SDL_audio_c.h"
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41 #include "SDL_paudio.h"
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42
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43 #define DEBUG_AUDIO 0
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44
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45 /* A conflict within AIX 4.3.3 <sys/> headers and probably others as well.
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46 * I guess nobody ever uses audio... Shame over AIX header files. */
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47 #include <sys/machine.h>
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48 #undef BIG_ENDIAN
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49 #include <sys/audio.h>
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50
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51 /* The tag name used by paud audio */
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52 #define PAUDIO_DRIVER_NAME "paud"
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53
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54 /* Open the audio device for playback, and don't block if busy */
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55 /* #define OPEN_FLAGS (O_WRONLY|O_NONBLOCK) */
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56 #define OPEN_FLAGS O_WRONLY
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57
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58 /* Get the name of the audio device we use for output */
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59
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60 #ifndef _PATH_DEV_DSP
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61 #define _PATH_DEV_DSP "/dev/%caud%c/%c"
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62 #endif
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63
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64 static char devsettings[][3] = {
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65 {'p', '0', '1'}, {'p', '0', '2'}, {'p', '0', '3'}, {'p', '0', '4'},
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66 {'p', '1', '1'}, {'p', '1', '2'}, {'p', '1', '3'}, {'p', '1', '4'},
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67 {'p', '2', '1'}, {'p', '2', '2'}, {'p', '2', '3'}, {'p', '2', '4'},
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68 {'p', '3', '1'}, {'p', '3', '2'}, {'p', '3', '3'}, {'p', '3', '4'},
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69 {'b', '0', '1'}, {'b', '0', '2'}, {'b', '0', '3'}, {'b', '0', '4'},
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70 {'b', '1', '1'}, {'b', '1', '2'}, {'b', '1', '3'}, {'b', '1', '4'},
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71 {'b', '2', '1'}, {'b', '2', '2'}, {'b', '2', '3'}, {'b', '2', '4'},
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72 {'b', '3', '1'}, {'b', '3', '2'}, {'b', '3', '3'}, {'b', '3', '4'},
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73 {'\0', '\0', '\0'}
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74 };
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75
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76 static int
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77 OpenUserDefinedDevice(char *path, int maxlen, int flags)
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78 {
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79 const char *audiodev;
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80 int fd;
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81
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82 /* Figure out what our audio device is */
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83 if ((audiodev = SDL_getenv("SDL_PATH_DSP")) == NULL) {
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84 audiodev = SDL_getenv("AUDIODEV");
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85 }
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86 if (audiodev == NULL) {
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87 return -1;
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88 }
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89 fd = open(audiodev, flags, 0);
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90 if (path != NULL) {
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91 SDL_strlcpy(path, audiodev, maxlen);
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92 path[maxlen - 1] = '\0';
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93 }
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94 return fd;
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95 }
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96
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97 static int
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98 OpenAudioPath(char *path, int maxlen, int flags, int classic)
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99 {
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100 struct stat sb;
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101 int cycle = 0;
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102 int fd = OpenUserDefinedDevice(path, maxlen, flags);
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103
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104 if (fd != -1) {
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105 return fd;
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106 }
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107
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108 /* !!! FIXME: do we really need a table here? */
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109 while (devsettings[cycle][0] != '\0') {
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110 char audiopath[1024];
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111 SDL_snprintf(audiopath, SDL_arraysize(audiopath),
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112 _PATH_DEV_DSP,
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113 devsettings[cycle][0],
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114 devsettings[cycle][1], devsettings[cycle][2]);
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115
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116 if (stat(audiopath, &sb) == 0) {
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117 fd = open(audiopath, flags, 0);
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118 if (fd > 0) {
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119 if (path != NULL) {
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120 SDL_strlcpy(path, audiopath, maxlen);
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121 }
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122 return fd;
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123 }
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124 }
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125 }
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126 return -1;
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127 }
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128
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129 /* This function waits until it is possible to write a full sound buffer */
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130 static void
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131 PAUDIO_WaitDevice(_THIS)
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132 {
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133 fd_set fdset;
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134
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135 /* See if we need to use timed audio synchronization */
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136 if (this->hidden->frame_ticks) {
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137 /* Use timer for general audio synchronization */
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138 Sint32 ticks;
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139
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140 ticks =
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141 ((Sint32) (this->hidden->next_frame - SDL_GetTicks())) -
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142 FUDGE_TICKS;
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143 if (ticks > 0) {
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144 SDL_Delay(ticks);
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145 }
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146 } else {
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147 audio_buffer paud_bufinfo;
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148
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149 /* Use select() for audio synchronization */
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150 struct timeval timeout;
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151 FD_ZERO(&fdset);
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152 FD_SET(this->hidden->audio_fd, &fdset);
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153
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154 if (ioctl(this->hidden->audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0) {
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155 #ifdef DEBUG_AUDIO
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156 fprintf(stderr, "Couldn't get audio buffer information\n");
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157 #endif
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158 timeout.tv_sec = 10;
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159 timeout.tv_usec = 0;
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160 } else {
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161 long ms_in_buf = paud_bufinfo.write_buf_time;
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162 timeout.tv_sec = ms_in_buf / 1000;
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163 ms_in_buf = ms_in_buf - timeout.tv_sec * 1000;
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164 timeout.tv_usec = ms_in_buf * 1000;
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165 #ifdef DEBUG_AUDIO
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166 fprintf(stderr,
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167 "Waiting for write_buf_time=%ld,%ld\n",
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168 timeout.tv_sec, timeout.tv_usec);
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169 #endif
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170 }
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171
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172 #ifdef DEBUG_AUDIO
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173 fprintf(stderr, "Waiting for audio to get ready\n");
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174 #endif
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175 if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout)
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176 <= 0) {
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177 const char *message =
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178 "Audio timeout - buggy audio driver? (disabled)";
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179 /*
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180 * In general we should never print to the screen,
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181 * but in this case we have no other way of letting
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182 * the user know what happened.
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183 */
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184 fprintf(stderr, "SDL: %s - %s\n", strerror(errno), message);
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185 this->enabled = 0;
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186 /* Don't try to close - may hang */
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187 this->hidden->audio_fd = -1;
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188 #ifdef DEBUG_AUDIO
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189 fprintf(stderr, "Done disabling audio\n");
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190 #endif
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191 }
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192 #ifdef DEBUG_AUDIO
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193 fprintf(stderr, "Ready!\n");
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194 #endif
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195 }
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196 }
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197
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198 static void
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199 PAUDIO_PlayDevice(_THIS)
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200 {
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201 int written = 0;
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202 const Uint8 *mixbuf = this->hidden->mixbuf;
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203 const size_t mixlen = this->hidden->mixlen;
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204
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205 /* Write the audio data, checking for EAGAIN on broken audio drivers */
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206 do {
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207 written = write(this->hidden->audio_fd, mixbuf, mixlen);
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208 if ((written < 0) && ((errno == 0) || (errno == EAGAIN))) {
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209 SDL_Delay(1); /* Let a little CPU time go by */
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210 }
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211 }
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212 while ((written < 0) &&
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213 ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)));
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214
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215 /* If timer synchronization is enabled, set the next write frame */
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216 if (this->hidden->frame_ticks) {
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217 this->hidden->next_frame += this->hidden->frame_ticks;
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218 }
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219
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220 /* If we couldn't write, assume fatal error for now */
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221 if (written < 0) {
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222 this->enabled = 0;
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223 }
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224 #ifdef DEBUG_AUDIO
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225 fprintf(stderr, "Wrote %d bytes of audio data\n", written);
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226 #endif
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227 }
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228
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229 static Uint8 *
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230 PAUDIO_GetDeviceBuf(_THIS)
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231 {
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232 return this->hidden->mixbuf;
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233 }
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234
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235 static void
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236 PAUDIO_CloseDevice(_THIS)
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237 {
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238 if (this->hidden != NULL) {
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239 if (this->hidden->mixbuf != NULL) {
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240 SDL_FreeAudioMem(this->hidden->mixbuf);
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241 this->hidden->mixbuf = NULL;
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242 }
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243 if (this->hidden->audio_fd >= 0) {
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244 close(this->hidden->audio_fd);
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245 this->hidden->audio_fd = -1;
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246 }
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247 SDL_free(this->hidden);
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248 this->hidden = NULL;
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249 }
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250 }
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251
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252 static int
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253 PAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
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254 {
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255 const char *workaround = SDL_getenv("SDL_DSP_NOSELECT");
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256 char audiodev[1024];
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diff changeset
257 const char *err = NULL;
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258 int format;
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259 int bytes_per_sample;
1982
3b4ce57c6215 First shot at new audio data types (int32 and float32).
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260 SDL_AudioFormat test_format;
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261 audio_init paud_init;
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262 audio_buffer paud_bufinfo;
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263 audio_status paud_status;
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264 audio_control paud_control;
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265 audio_change paud_change;
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diff changeset
266 int fd = -1;
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267
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268 /* Initialize all variables that we clean on shutdown */
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269 this->hidden = (struct SDL_PrivateAudioData *)
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270 SDL_malloc((sizeof *this->hidden));
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271 if (this->hidden == NULL) {
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272 SDL_OutOfMemory();
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273 return 0;
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274 }
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275 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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276
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277 /* Open the audio device */
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278 fd = OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0);
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279 this->hidden->audio_fd = fd;
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diff changeset
280 if (fd < 0) {
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281 PAUDIO_CloseDevice(this);
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282 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno));
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283 return 0;
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284 }
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285
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286 /*
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287 * We can't set the buffer size - just ask the device for the maximum
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288 * that we can have.
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289 */
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diff changeset
290 if (ioctl(fd, AUDIO_BUFFER, &paud_bufinfo) < 0) {
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diff changeset
291 PAUDIO_CloseDevice(this);
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292 SDL_SetError("Couldn't get audio buffer information");
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293 return 0;
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294 }
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295
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diff changeset
296 if (this->spec.channels > 1)
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297 this->spec.channels = 2;
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298 else
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299 this->spec.channels = 1;
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300
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301 /*
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302 * Fields in the audio_init structure:
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303 *
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304 * Ignored by us:
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305 *
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306 * paud.loadpath[LOAD_PATH]; * DSP code to load, MWave chip only?
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307 * paud.slot_number; * slot number of the adapter
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308 * paud.device_id; * adapter identification number
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309 *
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310 * Input:
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diff changeset
311 *
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diff changeset
312 * paud.srate; * the sampling rate in Hz
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313 * paud.bits_per_sample; * 8, 16, 32, ...
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314 * paud.bsize; * block size for this rate
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diff changeset
315 * paud.mode; * ADPCM, PCM, MU_LAW, A_LAW, SOURCE_MIX
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316 * paud.channels; * 1=mono, 2=stereo
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317 * paud.flags; * FIXED - fixed length data
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318 * * LEFT_ALIGNED, RIGHT_ALIGNED (var len only)
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diff changeset
319 * * TWOS_COMPLEMENT - 2's complement data
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320 * * SIGNED - signed? comment seems wrong in sys/audio.h
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321 * * BIG_ENDIAN
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322 * paud.operation; * PLAY, RECORD
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323 *
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324 * Output:
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diff changeset
325 *
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326 * paud.flags; * PITCH - pitch is supported
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327 * * INPUT - input is supported
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328 * * OUTPUT - output is supported
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329 * * MONITOR - monitor is supported
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330 * * VOLUME - volume is supported
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331 * * VOLUME_DELAY - volume delay is supported
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332 * * BALANCE - balance is supported
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diff changeset
333 * * BALANCE_DELAY - balance delay is supported
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334 * * TREBLE - treble control is supported
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335 * * BASS - bass control is supported
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336 * * BESTFIT_PROVIDED - best fit returned
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337 * * LOAD_CODE - DSP load needed
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diff changeset
338 * paud.rc; * NO_PLAY - DSP code can't do play requests
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339 * * NO_RECORD - DSP code can't do record requests
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340 * * INVALID_REQUEST - request was invalid
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341 * * CONFLICT - conflict with open's flags
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342 * * OVERLOADED - out of DSP MIPS or memory
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343 * paud.position_resolution; * smallest increment for position
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344 */
0
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345
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diff changeset
346 paud_init.srate = this->spec.freq;
1895
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347 paud_init.mode = PCM;
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348 paud_init.operation = PLAY;
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diff changeset
349 paud_init.channels = this->spec.channels;
0
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diff changeset
350
1895
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diff changeset
351 /* Try for a closest match on audio format */
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diff changeset
352 format = 0;
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diff changeset
353 for (test_format = SDL_FirstAudioFormat(this->spec.format);
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diff changeset
354 !format && test_format;) {
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diff changeset
355 #ifdef DEBUG_AUDIO
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356 fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
0
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357 #endif
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diff changeset
358 switch (test_format) {
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diff changeset
359 case AUDIO_U8:
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360 bytes_per_sample = 1;
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diff changeset
361 paud_init.bits_per_sample = 8;
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diff changeset
362 paud_init.flags = TWOS_COMPLEMENT | FIXED;
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363 format = 1;
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diff changeset
364 break;
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diff changeset
365 case AUDIO_S8:
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diff changeset
366 bytes_per_sample = 1;
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diff changeset
367 paud_init.bits_per_sample = 8;
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diff changeset
368 paud_init.flags = SIGNED | TWOS_COMPLEMENT | FIXED;
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diff changeset
369 format = 1;
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diff changeset
370 break;
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diff changeset
371 case AUDIO_S16LSB:
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diff changeset
372 bytes_per_sample = 2;
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diff changeset
373 paud_init.bits_per_sample = 16;
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diff changeset
374 paud_init.flags = SIGNED | TWOS_COMPLEMENT | FIXED;
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diff changeset
375 format = 1;
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diff changeset
376 break;
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diff changeset
377 case AUDIO_S16MSB:
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diff changeset
378 bytes_per_sample = 2;
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diff changeset
379 paud_init.bits_per_sample = 16;
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diff changeset
380 paud_init.flags = BIG_ENDIAN | SIGNED | TWOS_COMPLEMENT | FIXED;
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diff changeset
381 format = 1;
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diff changeset
382 break;
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diff changeset
383 case AUDIO_U16LSB:
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diff changeset
384 bytes_per_sample = 2;
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diff changeset
385 paud_init.bits_per_sample = 16;
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diff changeset
386 paud_init.flags = TWOS_COMPLEMENT | FIXED;
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diff changeset
387 format = 1;
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diff changeset
388 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
389 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
390 bytes_per_sample = 2;
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
391 paud_init.bits_per_sample = 16;
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
392 paud_init.flags = BIG_ENDIAN | TWOS_COMPLEMENT | FIXED;
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
393 format = 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
394 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
395 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
396 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
397 }
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
398 if (!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
399 test_format = SDL_NextAudioFormat();
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
400 }
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
401 }
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
402 if (format == 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 #ifdef DEBUG_AUDIO
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
404 fprintf(stderr, "Couldn't find any hardware audio formats\n");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 #endif
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
406 PAUDIO_CloseDevice(this);
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
407 SDL_SetError("Couldn't find any hardware audio formats");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
408 return 0;
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
409 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
410 this->spec.format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411
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
412 /*
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
413 * We know the buffer size and the max number of subsequent writes
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
414 * that can be pending. If more than one can pend, allow the application
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
415 * to do something like double buffering between our write buffer and
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
416 * the device's own buffer that we are filling with write() anyway.
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
417 *
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
418 * We calculate this->spec.samples like this because
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
419 * SDL_CalculateAudioSpec() will give put paud_bufinfo.write_buf_cap
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
420 * (or paud_bufinfo.write_buf_cap/2) into this->spec.size in return.
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
421 */
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
422 if (paud_bufinfo.request_buf_cap == 1) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
423 this->spec.samples = paud_bufinfo.write_buf_cap
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
424 / bytes_per_sample / 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
425 } else {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
426 this->spec.samples = paud_bufinfo.write_buf_cap
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
427 / bytes_per_sample / this->spec.channels / 2;
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
428 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
429 paud_init.bsize = bytes_per_sample * this->spec.channels;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
431 SDL_CalculateAudioSpec(&this->spec);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432
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
433 /*
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
434 * The AIX paud device init can't modify the values of the audio_init
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
435 * structure that we pass to it. So we don't need any recalculation
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
436 * of this stuff and no reinit call as in linux dsp and dma code.
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
437 *
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
438 * /dev/paud supports all of the encoding formats, so we don't need
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
439 * to do anything like reopening the device, either.
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
440 */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
441 if (ioctl(fd, AUDIO_INIT, &paud_init) < 0) {
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
442 switch (paud_init.rc) {
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
443 case 1:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
444 err = "Couldn't set audio format: DSP can't do play requests";
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
445 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
446 case 2:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
447 err = "Couldn't set audio format: DSP can't do record requests";
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
448 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
449 case 4:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
450 err = "Couldn't set audio format: request was invalid";
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
451 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
452 case 5:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
453 err = "Couldn't set audio format: conflict with open's flags";
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
454 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
455 case 6:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
456 err = "Couldn't set audio format: out of DSP MIPS or memory";
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
457 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
458 default:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
459 err = "Couldn't set audio format: not documented in sys/audio.h";
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
460 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
461 }
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
462 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
464 if (err != NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
465 PAUDIO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
466 SDL_SetError("Paudio: %s", err);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
467 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
468 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
469
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
470 /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
471 this->hidden->mixlen = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
472 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
473 if (this->hidden->mixbuf == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
474 PAUDIO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
475 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
476 return 0;
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
477 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
478 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479
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
480 /*
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
481 * Set some paramters: full volume, first speaker that we can find.
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
482 * Ignore the other settings for now.
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
483 */
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
484 paud_change.input = AUDIO_IGNORE; /* the new input source */
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
485 paud_change.output = OUTPUT_1; /* EXTERNAL_SPEAKER,INTERNAL_SPEAKER,OUTPUT_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
486 paud_change.monitor = AUDIO_IGNORE; /* the new monitor state */
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
487 paud_change.volume = 0x7fffffff; /* volume level [0-0x7fffffff] */
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
488 paud_change.volume_delay = AUDIO_IGNORE; /* the new volume delay */
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
489 paud_change.balance = 0x3fffffff; /* the new balance */
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
490 paud_change.balance_delay = AUDIO_IGNORE; /* the new balance delay */
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
491 paud_change.treble = AUDIO_IGNORE; /* the new treble state */
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
492 paud_change.bass = AUDIO_IGNORE; /* the new bass state */
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
493 paud_change.pitch = AUDIO_IGNORE; /* the new pitch state */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494
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
495 paud_control.ioctl_request = AUDIO_CHANGE;
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
496 paud_control.request_info = (char *) &paud_change;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
497 if (ioctl(fd, AUDIO_CONTROL, &paud_control) < 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 #ifdef DEBUG_AUDIO
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
499 fprintf(stderr, "Can't change audio display settings\n");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 #endif
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
501 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502
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
503 /*
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
504 * Tell the device to expect data. Actual start will wait for
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
505 * the first write() call.
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
506 */
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
507 paud_control.ioctl_request = AUDIO_START;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
508 paud_control.position = 0;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
509 if (ioctl(fd, AUDIO_CONTROL, &paud_control) < 0) {
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parents: 1982
diff changeset
510 PAUDIO_CloseDevice(this);
0
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parents:
diff changeset
511 #ifdef DEBUG_AUDIO
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
512 fprintf(stderr, "Can't start audio play\n");
0
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parents:
diff changeset
513 #endif
1895
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parents: 1402
diff changeset
514 SDL_SetError("Can't start audio play");
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
515 return 0;
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
516 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517
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
518 /* Check to see if we need to use select() workaround */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
519 if (workaround != NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
520 this->hidden->frame_ticks = (float) (this->spec.samples * 1000) /
2060
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diff changeset
521 this->spec.freq;
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
522 this->hidden->next_frame = SDL_GetTicks() + this->hidden->frame_ticks;
1895
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diff changeset
523 }
0
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parents:
diff changeset
524
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
525 /* We're ready to rock and roll. :-) */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
526 return 1;
0
74212992fb08 Initial revision
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parents:
diff changeset
527 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
529 static int
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
530 PAUDIO_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
531 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
532 int fd = OpenAudioPath(NULL, 0, OPEN_FLAGS, 0);
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
533 if (fd < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
534 SDL_SetError("PAUDIO: Couldn't open audio device");
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
535 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
536 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
537 close(fd);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
538
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
539 /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
540 impl->OpenDevice = DSP_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
541 impl->PlayDevice = DSP_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
542 impl->PlayDevice = DSP_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
543 impl->GetDeviceBuf = DSP_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
544 impl->CloseDevice = DSP_CloseDevice;
2060
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diff changeset
545 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: add device enum! */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
546
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
547 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
548 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
549
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
550 AudioBootStrap PAUDIO_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
551 PAUDIO_DRIVER_NAME, "AIX Paudio", PAUDIO_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
552 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
553
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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
554 /* vi: set ts=4 sw=4 expandtab: */