Mercurial > sdl-ios-xcode
annotate src/audio/bsd/SDL_bsdaudio.c @ 1982:3b4ce57c6215
First shot at new audio data types (int32 and float32).
Notable changes:
- Converters between types are autogenerated. Instead of making multiple
passes over the data with seperate filters for endianess, size, signedness,
etc, converting between data types is always one specialized filter. This
simplifies SDL_BuildAudioCVT(), which otherwise had a million edge cases
with the new types, and makes the actually conversions more CPU cache
friendly. Left a stub for adding specific optimized versions of these
routines (SSE/MMX/Altivec, assembler, etc)
- Autogenerated converters are built by SDL/src/audio/sdlgenaudiocvt.pl. This
does not need to be run unless tweaking the code, and thus doesn't need
integration into the build system.
- Went through all the drivers and tried to weed out all the "Uint16"
references that are better specified with the new SDL_AudioFormat typedef.
- Cleaned out a bunch of hardcoded bitwise magic numbers and replaced them
with new SDL_AUDIO_* macros.
- Added initial float32 and int32 support code. Theoretically, existing
drivers will push these through converters to get the data they want to
feed to the hardware.
Still TODO:
- Optimize and debug new converters.
- Update the CoreAudio backend to accept float32 data directly.
- Other backends, too?
- SDL_LoadWAV() needs to be updated to support int32 and float32 .wav files
(both of which exist and can be generated by 'sox' for testing purposes).
- Update the mixer to handle new datatypes.
- Optionally update SDL_sound and SDL_mixer, etc.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Thu, 24 Aug 2006 12:10:46 +0000 |
parents | c121d94672cb |
children | 5f6550e5184f c8b3d3d13ed1 |
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 /* |
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25 * Driver for native OpenBSD/NetBSD audio(4). |
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26 * vedge@vedge.com.ar. |
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27 */ |
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28 |
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29 #include <errno.h> |
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30 #include <unistd.h> |
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31 #include <fcntl.h> |
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32 #include <sys/time.h> |
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33 #include <sys/ioctl.h> |
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34 #include <sys/stat.h> |
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35 #include <sys/types.h> |
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36 #include <sys/audioio.h> |
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37 |
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38 #include "SDL_timer.h" |
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39 #include "SDL_audio.h" |
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40 #include "../SDL_audiomem.h" |
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41 #include "../SDL_audio_c.h" |
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42 #include "../SDL_audiodev_c.h" |
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43 #include "SDL_bsdaudio.h" |
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44 |
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45 /* The tag name used by NetBSD/OpenBSD audio */ |
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46 #ifdef __NetBSD__ |
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47 #define BSD_AUDIO_DRIVER_NAME "netbsd" |
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48 #define BSD_AUDIO_DRIVER_DESC "Native NetBSD audio" |
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49 #else |
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50 #define BSD_AUDIO_DRIVER_NAME "openbsd" |
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51 #define BSD_AUDIO_DRIVER_DESC "Native OpenBSD audio" |
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52 #endif |
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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 USE_BLOCKING_WRITES */ |
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56 |
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57 /* Use timer for synchronization */ |
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58 /* #define USE_TIMER_SYNC */ |
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59 |
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60 /* #define DEBUG_AUDIO */ |
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61 /* #define DEBUG_AUDIO_STREAM */ |
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62 |
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63 #ifdef USE_BLOCKING_WRITES |
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64 #define OPEN_FLAGS O_WRONLY |
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65 #else |
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66 #define OPEN_FLAGS (O_WRONLY|O_NONBLOCK) |
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67 #endif |
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68 |
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69 /* Audio driver functions */ |
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70 static void OBSD_WaitAudio(_THIS); |
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71 static int OBSD_OpenAudio(_THIS, SDL_AudioSpec * spec); |
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72 static void OBSD_PlayAudio(_THIS); |
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73 static Uint8 *OBSD_GetAudioBuf(_THIS); |
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74 static void OBSD_CloseAudio(_THIS); |
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75 |
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76 #ifdef DEBUG_AUDIO |
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77 static void OBSD_Status(_THIS); |
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78 #endif |
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79 |
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80 /* Audio driver bootstrap functions */ |
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81 |
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82 static int |
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83 Audio_Available(void) |
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84 { |
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85 int fd; |
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86 int available; |
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87 |
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88 available = 0; |
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89 fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0); |
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90 if (fd >= 0) { |
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91 available = 1; |
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92 close(fd); |
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93 } |
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94 return (available); |
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95 } |
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96 |
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97 static void |
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98 Audio_DeleteDevice(SDL_AudioDevice * device) |
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99 { |
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100 SDL_free(device->hidden); |
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101 SDL_free(device); |
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102 } |
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103 |
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104 static SDL_AudioDevice * |
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105 Audio_CreateDevice(int devindex) |
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106 { |
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107 SDL_AudioDevice *this; |
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108 |
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109 /* Initialize all variables that we clean on shutdown */ |
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110 this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice)); |
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111 if (this) { |
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112 SDL_memset(this, 0, (sizeof *this)); |
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113 this->hidden = (struct SDL_PrivateAudioData *) |
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114 SDL_malloc((sizeof *this->hidden)); |
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115 } |
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116 if ((this == NULL) || (this->hidden == NULL)) { |
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117 SDL_OutOfMemory(); |
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118 if (this) |
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119 SDL_free(this); |
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120 return (0); |
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121 } |
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122 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
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123 audio_fd = -1; |
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124 |
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125 /* Set the function pointers */ |
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126 this->OpenAudio = OBSD_OpenAudio; |
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127 this->WaitAudio = OBSD_WaitAudio; |
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128 this->PlayAudio = OBSD_PlayAudio; |
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129 this->GetAudioBuf = OBSD_GetAudioBuf; |
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130 this->CloseAudio = OBSD_CloseAudio; |
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131 |
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132 this->free = Audio_DeleteDevice; |
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133 |
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134 return this; |
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135 } |
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136 |
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137 AudioBootStrap BSD_AUDIO_bootstrap = { |
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138 BSD_AUDIO_DRIVER_NAME, BSD_AUDIO_DRIVER_DESC, |
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139 Audio_Available, Audio_CreateDevice |
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140 }; |
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141 |
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142 /* This function waits until it is possible to write a full sound buffer */ |
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143 static void |
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144 OBSD_WaitAudio(_THIS) |
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145 { |
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146 #ifndef USE_BLOCKING_WRITES /* Not necessary when using blocking writes */ |
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147 /* See if we need to use timed audio synchronization */ |
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148 if (frame_ticks) { |
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149 /* Use timer for general audio synchronization */ |
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150 Sint32 ticks; |
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151 |
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152 ticks = ((Sint32) (next_frame - SDL_GetTicks())) - FUDGE_TICKS; |
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153 if (ticks > 0) { |
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154 SDL_Delay(ticks); |
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155 } |
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156 } else { |
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157 /* Use select() for audio synchronization */ |
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158 fd_set fdset; |
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159 struct timeval timeout; |
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160 |
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161 FD_ZERO(&fdset); |
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162 FD_SET(audio_fd, &fdset); |
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163 timeout.tv_sec = 10; |
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164 timeout.tv_usec = 0; |
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165 #ifdef DEBUG_AUDIO |
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166 fprintf(stderr, "Waiting for audio to get ready\n"); |
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167 #endif |
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168 if (select(audio_fd + 1, NULL, &fdset, NULL, &timeout) <= 0) { |
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169 const char *message = |
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170 "Audio timeout - buggy audio driver? (disabled)"; |
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171 /* In general we should never print to the screen, |
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172 but in this case we have no other way of letting |
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173 the user know what happened. |
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174 */ |
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175 fprintf(stderr, "SDL: %s\n", message); |
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176 this->enabled = 0; |
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177 /* Don't try to close - may hang */ |
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178 audio_fd = -1; |
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179 #ifdef DEBUG_AUDIO |
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180 fprintf(stderr, "Done disabling audio\n"); |
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181 #endif |
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182 } |
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183 #ifdef DEBUG_AUDIO |
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184 fprintf(stderr, "Ready!\n"); |
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185 #endif |
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186 } |
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187 #endif /* !USE_BLOCKING_WRITES */ |
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188 } |
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189 |
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190 static void |
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191 OBSD_PlayAudio(_THIS) |
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192 { |
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193 int written, p = 0; |
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194 |
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195 /* Write the audio data, checking for EAGAIN on broken audio drivers */ |
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196 do { |
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197 written = write(audio_fd, &mixbuf[p], mixlen - p); |
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198 if (written > 0) |
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199 p += written; |
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200 if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) { |
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201 /* Non recoverable error has occurred. It should be reported!!! */ |
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202 perror("audio"); |
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203 break; |
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204 } |
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205 |
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206 if (p < written |
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207 || ((written < 0) && ((errno == 0) || (errno == EAGAIN)))) { |
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208 SDL_Delay(1); /* Let a little CPU time go by */ |
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209 } |
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210 } |
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211 while (p < written); |
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212 |
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213 /* If timer synchronization is enabled, set the next write frame */ |
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214 if (frame_ticks) { |
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215 next_frame += frame_ticks; |
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216 } |
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217 |
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218 /* If we couldn't write, assume fatal error for now */ |
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219 if (written < 0) { |
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220 this->enabled = 0; |
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221 } |
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222 #ifdef DEBUG_AUDIO |
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223 fprintf(stderr, "Wrote %d bytes of audio data\n", written); |
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224 #endif |
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225 } |
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226 |
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227 static Uint8 * |
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228 OBSD_GetAudioBuf(_THIS) |
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229 { |
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230 return (mixbuf); |
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231 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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232 |
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Good idea, renaming OpenBSD audio to BSD audio.
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233 static void |
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Good idea, renaming OpenBSD audio to BSD audio.
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234 OBSD_CloseAudio(_THIS) |
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Good idea, renaming OpenBSD audio to BSD audio.
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235 { |
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236 if (mixbuf != NULL) { |
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237 SDL_FreeAudioMem(mixbuf); |
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238 mixbuf = NULL; |
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239 } |
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240 if (audio_fd >= 0) { |
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241 close(audio_fd); |
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242 audio_fd = -1; |
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243 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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244 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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245 |
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Good idea, renaming OpenBSD audio to BSD audio.
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246 #ifdef DEBUG_AUDIO |
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Good idea, renaming OpenBSD audio to BSD audio.
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247 void |
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248 OBSD_Status(_THIS) |
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Good idea, renaming OpenBSD audio to BSD audio.
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249 { |
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Good idea, renaming OpenBSD audio to BSD audio.
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250 audio_info_t info; |
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Good idea, renaming OpenBSD audio to BSD audio.
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251 |
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252 if (ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) { |
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253 fprintf(stderr, "AUDIO_GETINFO failed.\n"); |
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254 return; |
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255 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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256 |
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257 fprintf(stderr, "\n" |
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258 "[play/record info]\n" |
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259 "buffer size : %d bytes\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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260 "sample rate : %i Hz\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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261 "channels : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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262 "precision : %i-bit\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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263 "encoding : 0x%x\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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264 "seek : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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265 "sample count : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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266 "EOF count : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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267 "paused : %s\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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268 "error occured : %s\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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269 "waiting : %s\n" |
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270 "active : %s\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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271 "", |
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272 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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273 play. |
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274 buffer_size, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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275 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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276 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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277 sample_rate, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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278 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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279 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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280 channels, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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281 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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282 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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283 precision, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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284 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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285 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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286 encoding, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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287 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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288 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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289 seek, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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290 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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291 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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292 samples, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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293 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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294 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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295 eof, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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296 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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297 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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298 pause |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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299 ? |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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300 "yes" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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301 : |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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302 "no", |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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303 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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304 play. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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305 error |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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306 ? |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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307 "yes" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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308 : |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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309 "no", |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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310 info. |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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311 play.waiting ? "yes" : "no", info.play.active ? "yes" : "no"); |
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Good idea, renaming OpenBSD audio to BSD audio.
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312 |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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313 fprintf(stderr, "\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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314 "[audio info]\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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315 "monitor_gain : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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316 "hw block size : %d bytes\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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317 "hi watermark : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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318 "lo watermark : %i\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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319 "audio mode : %s\n" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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320 "", |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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321 info.monitor_gain, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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322 info.blocksize, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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323 info.hiwat, info.lowat, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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324 (info.mode == AUMODE_PLAY) ? "PLAY" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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325 : (info.mode = AUMODE_RECORD) ? "RECORD" |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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326 : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?")); |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
327 } |
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
328 #endif /* DEBUG_AUDIO */ |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
329 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
330 static int |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
331 OBSD_OpenAudio(_THIS, SDL_AudioSpec * spec) |
1567
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
332 { |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
333 char audiodev[64]; |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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|
334 SDL_AudioFormat format; |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
335 audio_info_t info; |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
336 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
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|
337 AUDIO_INITINFO(&info); |
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338 |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
339 /* Calculate the final parameters for this audio specification */ |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
340 SDL_CalculateAudioSpec(spec); |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
341 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
342 #ifdef USE_TIMER_SYNC |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
343 frame_ticks = 0.0; |
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Good idea, renaming OpenBSD audio to BSD audio.
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344 #endif |
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Good idea, renaming OpenBSD audio to BSD audio.
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345 |
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Good idea, renaming OpenBSD audio to BSD audio.
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346 /* Open the audio device */ |
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Good idea, renaming OpenBSD audio to BSD audio.
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347 audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0); |
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348 if (audio_fd < 0) { |
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349 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); |
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350 return (-1); |
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351 } |
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352 |
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Good idea, renaming OpenBSD audio to BSD audio.
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353 /* Set to play mode */ |
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Good idea, renaming OpenBSD audio to BSD audio.
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354 info.mode = AUMODE_PLAY; |
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355 if (ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) { |
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356 SDL_SetError("Couldn't put device into play mode"); |
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357 return (-1); |
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358 } |
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359 |
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Good idea, renaming OpenBSD audio to BSD audio.
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360 mixbuf = NULL; |
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Good idea, renaming OpenBSD audio to BSD audio.
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361 AUDIO_INITINFO(&info); |
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362 for (format = SDL_FirstAudioFormat(spec->format); |
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363 format; format = SDL_NextAudioFormat()) { |
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364 switch (format) { |
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365 case AUDIO_U8: |
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366 info.play.encoding = AUDIO_ENCODING_ULINEAR; |
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367 info.play.precision = 8; |
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368 break; |
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369 case AUDIO_S8: |
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370 info.play.encoding = AUDIO_ENCODING_SLINEAR; |
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371 info.play.precision = 8; |
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372 break; |
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373 case AUDIO_S16LSB: |
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374 info.play.encoding = AUDIO_ENCODING_SLINEAR_LE; |
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375 info.play.precision = 16; |
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376 break; |
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377 case AUDIO_S16MSB: |
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378 info.play.encoding = AUDIO_ENCODING_SLINEAR_BE; |
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379 info.play.precision = 16; |
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380 break; |
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381 case AUDIO_U16LSB: |
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382 info.play.encoding = AUDIO_ENCODING_ULINEAR_LE; |
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383 info.play.precision = 16; |
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384 break; |
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385 case AUDIO_U16MSB: |
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386 info.play.encoding = AUDIO_ENCODING_ULINEAR_BE; |
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387 info.play.precision = 16; |
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388 break; |
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389 default: |
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390 continue; |
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391 } |
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392 if (ioctl(audio_fd, AUDIO_SETINFO, &info) == 0) |
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393 break; |
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Good idea, renaming OpenBSD audio to BSD audio.
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394 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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395 |
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396 if (!format) { |
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397 SDL_SetError("No supported encoding for 0x%x", spec->format); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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398 return (-1); |
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Good idea, renaming OpenBSD audio to BSD audio.
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399 } |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
400 |
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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401 spec->format = format; |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
402 |
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
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|
403 AUDIO_INITINFO(&info); |
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
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404 info.play.channels = spec->channels; |
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Good idea, renaming OpenBSD audio to BSD audio.
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405 if (ioctl(audio_fd, AUDIO_SETINFO, &info) == -1) |
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406 spec->channels = 1; |
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Good idea, renaming OpenBSD audio to BSD audio.
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407 AUDIO_INITINFO(&info); |
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Good idea, renaming OpenBSD audio to BSD audio.
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408 info.play.sample_rate = spec->freq; |
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Good idea, renaming OpenBSD audio to BSD audio.
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409 info.blocksize = spec->size; |
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
410 info.hiwat = 5; |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
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parents:
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|
411 info.lowat = 3; |
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412 (void) ioctl(audio_fd, AUDIO_SETINFO, &info); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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413 (void) ioctl(audio_fd, AUDIO_GETINFO, &info); |
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414 spec->freq = info.play.sample_rate; |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
415 /* Allocate mixing buffer */ |
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
416 mixlen = spec->size; |
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417 mixbuf = (Uint8 *) SDL_AllocAudioMem(mixlen); |
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418 if (mixbuf == NULL) { |
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419 return (-1); |
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Good idea, renaming OpenBSD audio to BSD audio.
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|
420 } |
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Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
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|
421 SDL_memset(mixbuf, spec->silence, spec->size); |
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422 |
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
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423 /* Get the parent process id (we're the parent of the audio thread) */ |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
424 parent = getpid(); |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
425 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
426 #ifdef DEBUG_AUDIO |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
427 OBSD_Status(this); |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
428 #endif |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
429 |
12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
430 /* We're ready to rock and roll. :-) */ |
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431 return (0); |
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Good idea, renaming OpenBSD audio to BSD audio.
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parents:
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|
432 } |
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433 |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
434 /* vi: set ts=4 sw=4 expandtab: */ |