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annotate src/audio/pulse/SDL_pulseaudio.c @ 4211:3ce5bfddbaf6 SDL-1.2

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Fixed bug #572 Please merge this patch for the PA driver in SDL. http://0pointer.de/public/sdl-pulse-rework.patch This patch: - fixes buffering (i.e. reduces number of "fragments" to 2, doesn't defer filling up of the buffer until the entire buffer ran completely empty.) - drops $PASERVER and $PADEVICE env var support, since this is a duplication of $PULSE_SERVER and $PULSE_SINK which the PA libs honor anyway. This fixes the sound issues in all games I tested.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 08:03:00 +0000
parents a1b03ba2fcd0
children 5b99971a27b4
rev   line source
4211
3ce5bfddbaf6 Fixed bug #572
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1 /* -*- Mode: C; c-basic-offset: 8; indent-tabs-mode: t -*- */
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2 /*
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3 SDL - Simple DirectMedia Layer
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4 Copyright (C) 1997-2009 Sam Lantinga
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5
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6 This library is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU Lesser General Public
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8 License as published by the Free Software Foundation; either
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9 version 2.1 of the License, or (at your option) any later version.
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10
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11 This library is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 Lesser General Public License for more details.
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15
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16 You should have received a copy of the GNU Lesser General Public
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17 License along with this library; if not, write to the Free Software
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18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19
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20 Stéphan Kochen
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21 stephan@kochen.nl
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3ce5bfddbaf6 Fixed bug #572
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22
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23 Based on parts of the ALSA and ESounD output drivers.
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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 an PulseAudio network stream mixing buffer */
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28
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29 #include <sys/types.h>
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30 #include <unistd.h>
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31 #include <signal.h>
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32 #include <errno.h>
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33 #include <pulse/simple.h>
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34
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35 #include "SDL_timer.h"
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36 #include "SDL_audio.h"
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37 #include "../SDL_audiomem.h"
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38 #include "../SDL_audio_c.h"
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39 #include "../SDL_audiodev_c.h"
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40 #include "SDL_pulseaudio.h"
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41
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42 #ifdef SDL_AUDIO_DRIVER_PULSE_DYNAMIC
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43 #include "SDL_name.h"
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44 #include "SDL_loadso.h"
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45 #else
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46 #define SDL_NAME(X) X
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47 #endif
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48
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49 /* The tag name used by the driver */
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50 #define PULSE_DRIVER_NAME "pulse"
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51
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52 /* Audio driver functions */
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53 static int PULSE_OpenAudio(_THIS, SDL_AudioSpec *spec);
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54 static void PULSE_WaitAudio(_THIS);
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55 static void PULSE_PlayAudio(_THIS);
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56 static Uint8 *PULSE_GetAudioBuf(_THIS);
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57 static void PULSE_CloseAudio(_THIS);
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58
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59 #ifdef SDL_AUDIO_DRIVER_PULSE_DYNAMIC
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60
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61 static const char *pulse_library = SDL_AUDIO_DRIVER_PULSE_DYNAMIC;
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62 static void *pulse_handle = NULL;
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63 static int pulse_loaded = 0;
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64
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65 static pa_simple* (*SDL_NAME(pa_simple_new))(
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66 const char *server,
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67 const char *name,
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68 pa_stream_direction_t dir,
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69 const char *dev,
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70 const char *stream_name,
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71 const pa_sample_spec *ss,
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72 const pa_channel_map *map,
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73 const pa_buffer_attr *attr,
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74 int *error
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75 );
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76 static void (*SDL_NAME(pa_simple_free))(pa_simple *s);
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77 static int (*SDL_NAME(pa_simple_drain))(pa_simple *s, int *error);
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78 static int (*SDL_NAME(pa_simple_write))(
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79 pa_simple *s,
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80 const void *data,
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81 size_t length,
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82 int *error
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83 );
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84 static pa_channel_map* (*SDL_NAME(pa_channel_map_init_auto))(
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85 pa_channel_map *m,
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86 unsigned channels,
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87 pa_channel_map_def_t def
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88 );
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89
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90
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91 static struct {
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92 const char *name;
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93 void **func;
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94 } pulse_functions[] = {
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95 { "pa_simple_new",
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96 (void **)&SDL_NAME(pa_simple_new) },
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97 { "pa_simple_free",
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98 (void **)&SDL_NAME(pa_simple_free) },
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99 { "pa_simple_drain",
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100 (void **)&SDL_NAME(pa_simple_drain) },
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101 { "pa_simple_write",
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102 (void **)&SDL_NAME(pa_simple_write) },
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103 { "pa_channel_map_init_auto",
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104 (void **)&SDL_NAME(pa_channel_map_init_auto) },
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105 };
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106
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107 static void UnloadPulseLibrary()
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108 {
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109 if ( pulse_loaded ) {
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110 SDL_UnloadObject(pulse_handle);
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111 pulse_handle = NULL;
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112 pulse_loaded = 0;
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113 }
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114 }
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115
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116 static int LoadPulseLibrary(void)
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117 {
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118 int i, retval = -1;
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119
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120 pulse_handle = SDL_LoadObject(pulse_library);
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121 if ( pulse_handle ) {
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122 pulse_loaded = 1;
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123 retval = 0;
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124 for ( i=0; i<SDL_arraysize(pulse_functions); ++i ) {
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125 *pulse_functions[i].func = SDL_LoadFunction(pulse_handle, pulse_functions[i].name);
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126 if ( !*pulse_functions[i].func ) {
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127 retval = -1;
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128 UnloadPulseLibrary();
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129 break;
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130 }
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131 }
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132 }
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133 return retval;
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134 }
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135
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136 #else
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137
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138 static void UnloadPulseLibrary()
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139 {
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140 return;
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141 }
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142
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143 static int LoadPulseLibrary(void)
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144 {
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diff changeset
145 return 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
146 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148 #endif /* SDL_AUDIO_DRIVER_PULSE_DYNAMIC */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
149
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
150 /* Audio driver bootstrap functions */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
151
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
152 static int Audio_Available(void)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
153 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
154 pa_sample_spec paspec;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
155 pa_simple *connection;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
156 int available;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
157
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
158 available = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 if ( LoadPulseLibrary() < 0 ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 return available;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161 }
4211
3ce5bfddbaf6 Fixed bug #572
Sam Lantinga <slouken@libsdl.org>
parents: 4159
diff changeset
162
3939
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
163 /* Connect with a dummy format. */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164 paspec.format = PA_SAMPLE_U8;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165 paspec.rate = 11025;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166 paspec.channels = 1;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 connection = SDL_NAME(pa_simple_new)(
4211
3ce5bfddbaf6 Fixed bug #572
Sam Lantinga <slouken@libsdl.org>
parents: 4159
diff changeset
168 NULL, /* server */
3939
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 "Test stream", /* application name */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 PA_STREAM_PLAYBACK, /* playback mode */
4211
3ce5bfddbaf6 Fixed bug #572
Sam Lantinga <slouken@libsdl.org>
parents: 4159
diff changeset
171 NULL, /* device on the server */
3939
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 "Simple DirectMedia Layer", /* stream description */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173 &paspec, /* sample format spec */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 NULL, /* channel map */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175 NULL, /* buffering attributes */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 NULL /* error code */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177 );
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 if ( connection != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 available = 1;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 SDL_NAME(pa_simple_free)(connection);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 }
4211
3ce5bfddbaf6 Fixed bug #572
Sam Lantinga <slouken@libsdl.org>
parents: 4159
diff changeset
182
3939
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 UnloadPulseLibrary();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 return(available);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 static void Audio_DeleteDevice(SDL_AudioDevice *device)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 SDL_free(device->hidden);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 SDL_free(device);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 UnloadPulseLibrary();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 SDL_AudioDevice *this;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 /* Initialize all variables that we clean on shutdown */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 LoadPulseLibrary();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 if ( this ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 SDL_memset(this, 0, (sizeof *this));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 this->hidden = (struct SDL_PrivateAudioData *)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 SDL_malloc((sizeof *this->hidden));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 if ( (this == NULL) || (this->hidden == NULL) ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 SDL_OutOfMemory();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 if ( this ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 SDL_free(this);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 return(0);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 /* Set the function pointers */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 this->OpenAudio = PULSE_OpenAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 this->WaitAudio = PULSE_WaitAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 this->PlayAudio = PULSE_PlayAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 this->GetAudioBuf = PULSE_GetAudioBuf;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 this->CloseAudio = PULSE_CloseAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222 this->free = Audio_DeleteDevice;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 return this;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227 AudioBootStrap PULSE_bootstrap = {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 PULSE_DRIVER_NAME, "PulseAudio",
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 Audio_Available, Audio_CreateDevice
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230 };
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 /* This function waits until it is possible to write a full sound buffer */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 static void PULSE_WaitAudio(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 /* Check to see if the thread-parent process is still alive */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 { static int cnt = 0;
4211
3ce5bfddbaf6 Fixed bug #572
Sam Lantinga <slouken@libsdl.org>
parents: 4159
diff changeset
237 /* Note that this only works with thread implementations
3939
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 that use a different process id for each thread.
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239 */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 if ( kill(parent, 0) < 0 ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 this->enabled = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
247
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 static void PULSE_PlayAudio(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 /* Write the audio data */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251 if ( SDL_NAME(pa_simple_write)(stream, mixbuf, mixlen, NULL) != 0 )
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 this->enabled = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
255 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 static Uint8 *PULSE_GetAudioBuf(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 return(mixbuf);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 static void PULSE_CloseAudio(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 if ( mixbuf != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 SDL_FreeAudioMem(mixbuf);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 mixbuf = NULL;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 if ( stream != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 SDL_NAME(pa_simple_drain)(stream, NULL);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270 SDL_NAME(pa_simple_free)(stream);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 stream = NULL;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 /* Try to get the name of the program */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 static char *get_progname(void)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 char *progname = NULL;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279 #ifdef __LINUX__
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 FILE *fp;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 static char temp[BUFSIZ];
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 SDL_snprintf(temp, SDL_arraysize(temp), "/proc/%d/cmdline", getpid());
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 fp = fopen(temp, "r");
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 if ( fp != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 if ( fgets(temp, sizeof(temp)-1, fp) ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 progname = SDL_strrchr(temp, '/');
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 if ( progname == NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 progname = temp;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 } else {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 progname = progname+1;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 fclose(fp);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296 #endif
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297 return(progname);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298 }
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299
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300 static int PULSE_OpenAudio(_THIS, SDL_AudioSpec *spec)
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301 {
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302 Uint16 test_format;
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303 pa_sample_spec paspec;
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304 pa_buffer_attr paattr;
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305 pa_channel_map pacmap;
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306
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307 paspec.format = PA_SAMPLE_INVALID;
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308 for ( test_format = SDL_FirstAudioFormat(spec->format); test_format; ) {
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309 switch ( test_format ) {
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310 case AUDIO_U8:
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311 paspec.format = PA_SAMPLE_U8;
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312 break;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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313 case AUDIO_S16LSB:
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314 paspec.format = PA_SAMPLE_S16LE;
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315 break;
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316 case AUDIO_S16MSB:
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317 paspec.format = PA_SAMPLE_S16BE;
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318 break;
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319 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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320 if ( paspec.format != PA_SAMPLE_INVALID )
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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321 break;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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322 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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323 if (paspec.format == PA_SAMPLE_INVALID ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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324 SDL_SetError("Couldn't find any suitable audio formats");
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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325 return(-1);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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326 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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327 spec->format = test_format;
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328
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329 paspec.channels = spec->channels;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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330 paspec.rate = spec->freq;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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331
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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332 /* Calculate the final parameters for this audio specification */
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333 SDL_CalculateAudioSpec(spec);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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334
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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335 /* Allocate mixing buffer */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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336 mixlen = spec->size;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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337 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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338 if ( mixbuf == NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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339 return(-1);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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340 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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341 SDL_memset(mixbuf, spec->silence, spec->size);
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342
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343 /* Reduced prebuffering compared to the defaults. */
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344 paattr.tlength = mixlen*2;
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345 paattr.minreq = mixlen;
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346 paattr.prebuf = mixlen*2;
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347 paattr.maxlength = mixlen*2;
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348
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349 /* The SDL ALSA output hints us that we use Windows' channel mapping */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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350 /* http://bugzilla.libsdl.org/show_bug.cgi?id=110 */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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351 SDL_NAME(pa_channel_map_init_auto)(
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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diff changeset
352 &pacmap, spec->channels, PA_CHANNEL_MAP_WAVEEX);
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353
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354 /* Connect to the PulseAudio server */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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diff changeset
355 stream = SDL_NAME(pa_simple_new)(
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diff changeset
356 NULL, /* server */
3939
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diff changeset
357 get_progname(), /* application name */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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diff changeset
358 PA_STREAM_PLAYBACK, /* playback mode */
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diff changeset
359 NULL, /* device on the server */
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diff changeset
360 "Simple DirectMedia Layer", /* stream description */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff changeset
361 &paspec, /* sample format spec */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff changeset
362 &pacmap, /* channel map */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff changeset
363 &paattr, /* buffering attributes */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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diff changeset
364 NULL /* error code */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
365 );
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff changeset
366 if ( stream == NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
367 PULSE_CloseAudio(this);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff changeset
368 SDL_SetError("Could not connect to PulseAudio");
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 return(-1);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
370 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
371
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
372 /* Get the parent process id (we're the parent of the audio thread) */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff changeset
373 parent = getpid();
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diff changeset
374
3939
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diff changeset
375 return(0);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
376 }