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annotate src/audio/dsp/SDL_dspaudio.c @ 3294:470d0a416aa7

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Fixed bug #714 fuzzyTew@gmail.com 2009-03-14 15:18:45 PDT patch to change HAVE_ICONV to HAVE_ICONV_H There are two separate iconv checks in configure -- one for the header file and one for the library. include/SDL_stdinc.h uses the library define to see whether or not it should reference the types defined in the header, which naturally breaks if the library exists and the header does not.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 11:04:01 +0000
parents 2929ed239d2a
children f7b03b6838cb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 Sam Lantinga
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20 slouken@libsdl.org
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22 Modified in Oct 2004 by Hannu Savolainen
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23 hannu@opensound.com
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24 */
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25 #include "SDL_config.h"
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26
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27 /* Allow access to a raw mixing buffer */
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28
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29 #include <stdio.h> /* For perror() */
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30 #include <string.h> /* For strerror() */
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31 #include <errno.h>
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32 #include <unistd.h>
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33 #include <fcntl.h>
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34 #include <signal.h>
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35 #include <sys/time.h>
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36 #include <sys/ioctl.h>
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37 #include <sys/stat.h>
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38
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39 #if SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H
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40 /* This is installed on some systems */
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41 #include <soundcard.h>
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42 #else
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43 /* This is recommended by OSS */
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44 #include <sys/soundcard.h>
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45 #endif
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46
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47 #include "SDL_timer.h"
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48 #include "SDL_audio.h"
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49 #include "../SDL_audiomem.h"
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50 #include "../SDL_audio_c.h"
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51 #include "../SDL_audiodev_c.h"
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52 #include "SDL_dspaudio.h"
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53
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54 /* The tag name used by DSP audio */
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55 #define DSP_DRIVER_NAME "dsp"
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56
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57 /* Open the audio device for playback, and don't block if busy */
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58 #define OPEN_FLAGS_OUTPUT (O_WRONLY|O_NONBLOCK)
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59 #define OPEN_FLAGS_INPUT (O_RDONLY|O_NONBLOCK)
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60
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61 static char **outputDevices = NULL;
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62 static int outputDeviceCount = 0;
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63 static char **inputDevices = NULL;
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64 static int inputDeviceCount = 0;
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65
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66 static inline void
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67 free_device_list(char ***devs, int *count)
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68 {
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69 SDL_FreeUnixAudioDevices(devs, count);
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70 }
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71
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72 static inline void
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73 build_device_list(int iscapture, char ***devs, int *count)
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74 {
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75 const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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76 free_device_list(devs, count);
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77 SDL_EnumUnixAudioDevices(flags, 0, NULL, devs, count);
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78 }
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79
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80 static inline void
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81 build_device_lists(void)
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82 {
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83 build_device_list(0, &outputDevices, &outputDeviceCount);
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84 build_device_list(1, &inputDevices, &inputDeviceCount);
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85 }
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86
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87
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88 static inline void
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89 free_device_lists(void)
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90 {
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91 free_device_list(&outputDevices, &outputDeviceCount);
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92 free_device_list(&inputDevices, &inputDeviceCount);
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93 }
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94
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95
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96 static void
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97 DSP_Deinitialize(void)
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98 {
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99 free_device_lists();
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100 }
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101
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102
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103 static int
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104 DSP_DetectDevices(int iscapture)
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105 {
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106 if (iscapture) {
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107 build_device_list(1, &inputDevices, &inputDeviceCount);
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108 return inputDeviceCount;
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109 } else {
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110 build_device_list(0, &outputDevices, &outputDeviceCount);
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111 return outputDeviceCount;
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112 }
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113
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114 return 0; /* shouldn't ever hit this. */
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115 }
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116
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117 static const char *
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118 DSP_GetDeviceName(int index, int iscapture)
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119 {
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120 if ((iscapture) && (index < inputDeviceCount)) {
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121 return inputDevices[index];
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122 } else if ((!iscapture) && (index < outputDeviceCount)) {
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123 return outputDevices[index];
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124 }
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125
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126 SDL_SetError("No such device");
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127 return NULL;
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128 }
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129
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130
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131 static void
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diff changeset
132 DSP_CloseDevice(_THIS)
0
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133 {
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diff changeset
134 if (this->hidden != NULL) {
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diff changeset
135 if (this->hidden->mixbuf != NULL) {
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diff changeset
136 SDL_FreeAudioMem(this->hidden->mixbuf);
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diff changeset
137 this->hidden->mixbuf = NULL;
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diff changeset
138 }
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diff changeset
139 if (this->hidden->audio_fd >= 0) {
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diff changeset
140 close(this->hidden->audio_fd);
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diff changeset
141 this->hidden->audio_fd = -1;
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diff changeset
142 }
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diff changeset
143 SDL_free(this->hidden);
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diff changeset
144 this->hidden = NULL;
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145 }
0
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146 }
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147
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148
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diff changeset
149 static int
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diff changeset
150 DSP_OpenDevice(_THIS, const char *devname, int iscapture)
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151 {
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diff changeset
152 const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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153 int format;
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diff changeset
154 int value;
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diff changeset
155 int frag_spec;
1982
3b4ce57c6215 First shot at new audio data types (int32 and float32).
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diff changeset
156 SDL_AudioFormat test_format;
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157
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diff changeset
158 /* We don't care what the devname is...we'll try to open anything. */
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diff changeset
159 /* ...but default to first name in the list... */
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diff changeset
160 if (devname == NULL) {
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diff changeset
161 if (((iscapture) && (inputDeviceCount == 0)) ||
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diff changeset
162 ((!iscapture) && (outputDeviceCount == 0))) {
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diff changeset
163 SDL_SetError("No such audio device");
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diff changeset
164 return 0;
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diff changeset
165 }
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diff changeset
166 devname = ((iscapture) ? inputDevices[0] : outputDevices[0]);
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diff changeset
167 }
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diff changeset
168
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diff changeset
169 /* Make sure fragment size stays a power of 2, or OSS fails. */
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diff changeset
170 /* I don't know which of these are actually legal values, though... */
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diff changeset
171 if (this->spec.channels > 8)
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diff changeset
172 this->spec.channels = 8;
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diff changeset
173 else if (this->spec.channels > 4)
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diff changeset
174 this->spec.channels = 4;
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diff changeset
175 else if (this->spec.channels > 2)
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diff changeset
176 this->spec.channels = 2;
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diff changeset
177
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diff changeset
178 /* Initialize all variables that we clean on shutdown */
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diff changeset
179 this->hidden = (struct SDL_PrivateAudioData *)
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180 SDL_malloc((sizeof *this->hidden));
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diff changeset
181 if (this->hidden == NULL) {
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parents: 1982
diff changeset
182 SDL_OutOfMemory();
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diff changeset
183 return 0;
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diff changeset
184 }
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diff changeset
185 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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diff changeset
186
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187 /* Open the audio device */
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diff changeset
188 this->hidden->audio_fd = open(devname, flags, 0);
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parents: 1982
diff changeset
189 if (this->hidden->audio_fd < 0) {
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parents: 1982
diff changeset
190 DSP_CloseDevice(this);
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parents: 1982
diff changeset
191 SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
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diff changeset
192 return 0;
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193 }
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diff changeset
194 this->hidden->mixbuf = NULL;
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195
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196 /* Make the file descriptor use blocking writes with fcntl() */
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197 {
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diff changeset
198 long ctlflags;
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diff changeset
199 ctlflags = fcntl(this->hidden->audio_fd, F_GETFL);
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parents: 1982
diff changeset
200 ctlflags &= ~O_NONBLOCK;
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parents: 1982
diff changeset
201 if (fcntl(this->hidden->audio_fd, F_SETFL, ctlflags) < 0) {
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diff changeset
202 DSP_CloseDevice(this);
1895
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diff changeset
203 SDL_SetError("Couldn't set audio blocking mode");
2049
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diff changeset
204 return 0;
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205 }
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diff changeset
206 }
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diff changeset
207
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diff changeset
208 /* Get a list of supported hardware formats */
2049
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diff changeset
209 if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0) {
1895
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diff changeset
210 perror("SNDCTL_DSP_GETFMTS");
2049
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diff changeset
211 DSP_CloseDevice(this);
1895
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diff changeset
212 SDL_SetError("Couldn't get audio format list");
2049
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diff changeset
213 return 0;
1895
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diff changeset
214 }
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diff changeset
215
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diff changeset
216 /* Try for a closest match on audio format */
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diff changeset
217 format = 0;
2049
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diff changeset
218 for (test_format = SDL_FirstAudioFormat(this->spec.format);
1895
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diff changeset
219 !format && test_format;) {
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diff changeset
220 #ifdef DEBUG_AUDIO
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221 fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
968
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222 #endif
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223 switch (test_format) {
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224 case AUDIO_U8:
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diff changeset
225 if (value & AFMT_U8) {
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226 format = AFMT_U8;
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227 }
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diff changeset
228 break;
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diff changeset
229 case AUDIO_S16LSB:
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diff changeset
230 if (value & AFMT_S16_LE) {
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diff changeset
231 format = AFMT_S16_LE;
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232 }
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diff changeset
233 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
234 case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
235 if (value & AFMT_S16_BE) {
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diff changeset
236 format = AFMT_S16_BE;
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diff changeset
237 }
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diff changeset
238 break;
968
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diff changeset
239 #if 0
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diff changeset
240 /*
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diff changeset
241 * These formats are not used by any real life systems so they are not
4675910b0b7b Date: Mon, 11 Oct 2004 15:17:27 +0300 (EEST)
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diff changeset
242 * needed here.
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diff changeset
243 */
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diff changeset
244 case AUDIO_S8:
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diff changeset
245 if (value & AFMT_S8) {
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diff changeset
246 format = AFMT_S8;
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diff changeset
247 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
248 break;
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diff changeset
249 case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
250 if (value & AFMT_U16_LE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
diff changeset
251 format = AFMT_U16_LE;
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252 }
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diff changeset
253 break;
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diff changeset
254 case AUDIO_U16MSB:
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diff changeset
255 if (value & AFMT_U16_BE) {
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diff changeset
256 format = AFMT_U16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
diff changeset
257 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
258 break;
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diff changeset
259 #endif
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diff changeset
260 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
261 format = 0;
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parents: 1612
diff changeset
262 break;
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parents: 1612
diff changeset
263 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
diff changeset
264 if (!format) {
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diff changeset
265 test_format = SDL_NextAudioFormat();
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266 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
diff changeset
267 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
diff changeset
268 if (format == 0) {
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parents: 1982
diff changeset
269 DSP_CloseDevice(this);
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270 SDL_SetError("Couldn't find any hardware audio formats");
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parents: 1982
diff changeset
271 return 0;
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272 }
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parents: 1982
diff changeset
273 this->spec.format = test_format;
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274
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275 /* Set the audio format */
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diff changeset
276 value = format;
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diff changeset
277 if ((ioctl(this->hidden->audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) ||
866052b01ee5 indent is evil
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diff changeset
278 (value != format)) {
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279 perror("SNDCTL_DSP_SETFMT");
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parents: 1982
diff changeset
280 DSP_CloseDevice(this);
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281 SDL_SetError("Couldn't set audio format");
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diff changeset
282 return 0;
1895
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283 }
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284
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diff changeset
285 /* Set the number of channels of output */
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
286 value = this->spec.channels;
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parents: 1982
diff changeset
287 if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_CHANNELS, &value) < 0) {
1895
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diff changeset
288 perror("SNDCTL_DSP_CHANNELS");
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
289 DSP_CloseDevice(this);
1895
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parents: 1612
diff changeset
290 SDL_SetError("Cannot set the number of channels");
2049
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parents: 1982
diff changeset
291 return 0;
1895
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diff changeset
292 }
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parents: 1982
diff changeset
293 this->spec.channels = value;
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diff changeset
294
1895
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diff changeset
295 /* Set the DSP frequency */
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
296 value = this->spec.freq;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
297 if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_SPEED, &value) < 0) {
1895
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parents: 1612
diff changeset
298 perror("SNDCTL_DSP_SPEED");
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
299 DSP_CloseDevice(this);
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parents: 1612
diff changeset
300 SDL_SetError("Couldn't set audio frequency");
2049
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parents: 1982
diff changeset
301 return 0;
1895
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diff changeset
302 }
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diff changeset
303 this->spec.freq = value;
0
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diff changeset
304
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diff changeset
305 /* Calculate the final parameters for this audio specification */
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
306 SDL_CalculateAudioSpec(&this->spec);
0
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parents:
diff changeset
307
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diff changeset
308 /* Determine the power of two of the fragment size */
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
309 for (frag_spec = 0; (0x01U << frag_spec) < this->spec.size; ++frag_spec);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
310 if ((0x01U << frag_spec) != this->spec.size) {
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
311 DSP_CloseDevice(this);
1895
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parents: 1612
diff changeset
312 SDL_SetError("Fragment size must be a power of two");
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parents: 1982
diff changeset
313 return 0;
1895
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diff changeset
314 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
315 frag_spec |= 0x00020000; /* two fragments, for low latency */
0
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parents:
diff changeset
316
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diff changeset
317 /* Set the audio buffering parameters */
0
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parents:
diff changeset
318 #ifdef DEBUG_AUDIO
1895
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diff changeset
319 fprintf(stderr, "Requesting %d fragments of size %d\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
320 (frag_spec >> 16), 1 << (frag_spec & 0xFFFF));
0
74212992fb08 Initial revision
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parents:
diff changeset
321 #endif
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
322 if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_spec) < 0) {
1895
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parents: 1612
diff changeset
323 perror("SNDCTL_DSP_SETFRAGMENT");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
324 }
0
74212992fb08 Initial revision
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parents:
diff changeset
325 #ifdef DEBUG_AUDIO
1895
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parents: 1612
diff changeset
326 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
diff changeset
327 audio_buf_info info;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
328 ioctl(this->hidden->audio_fd, SNDCTL_DSP_GETOSPACE, &info);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
diff changeset
329 fprintf(stderr, "fragments = %d\n", info.fragments);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
diff changeset
330 fprintf(stderr, "fragstotal = %d\n", info.fragstotal);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
diff changeset
331 fprintf(stderr, "fragsize = %d\n", info.fragsize);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
diff changeset
332 fprintf(stderr, "bytes = %d\n", info.bytes);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
diff changeset
333 }
0
74212992fb08 Initial revision
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parents:
diff changeset
334 #endif
74212992fb08 Initial revision
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parents:
diff changeset
335
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
336 /* 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
337 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
338 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
339 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
340 DSP_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
341 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
342 return 0;
1895
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parents: 1612
diff changeset
343 }
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
344 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0
74212992fb08 Initial revision
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parents:
diff changeset
345
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parents: 1612
diff changeset
346 /* We're ready to rock and roll. :-) */
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
347 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
348 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
349
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
350
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
351 static void
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
352 DSP_PlayDevice(_THIS)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
353 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
354 const Uint8 *mixbuf = this->hidden->mixbuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
355 const int mixlen = 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
356 if (write(this->hidden->audio_fd, mixbuf, mixlen) == -1) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
357 perror("Audio write");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
358 this->enabled = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
359 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
360 #ifdef DEBUG_AUDIO
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
361 fprintf(stderr, "Wrote %d bytes of audio data\n", mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
362 #endif
0
74212992fb08 Initial revision
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diff changeset
363 }
1895
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parents: 1612
diff changeset
364
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
365 static Uint8 *
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
366 DSP_GetDeviceBuf(_THIS)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
367 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
368 return (this->hidden->mixbuf);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
369 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
370
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
371 static int
2060
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diff changeset
372 DSP_Init(SDL_AudioDriverImpl * impl)
2049
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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373 {
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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374 /* Set the function pointers */
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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375 impl->DetectDevices = DSP_DetectDevices;
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parents: 1982
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376 impl->GetDeviceName = DSP_GetDeviceName;
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parents: 1982
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377 impl->OpenDevice = DSP_OpenDevice;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
378 impl->PlayDevice = DSP_PlayDevice;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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379 impl->GetDeviceBuf = DSP_GetDeviceBuf;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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380 impl->CloseDevice = DSP_CloseDevice;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
381 impl->Deinitialize = DSP_Deinitialize;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
382
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
383 build_device_lists();
2938
2929ed239d2a Adjusted default choice of audio driver.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
diff changeset
384 return (outputDeviceCount > 0) ? 2 : 1;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
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385 }
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
386
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
387
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
388 AudioBootStrap DSP_bootstrap = {
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
389 DSP_DRIVER_NAME, "OSS /dev/dsp standard audio", DSP_Init, 0
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
390 };
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
391
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
diff changeset
392 /* vi: set ts=4 sw=4 expandtab: */