Mercurial > sdl-ios-xcode
annotate src/audio/pulse/SDL_pulseaudio.c @ 4347:38f22ed3a433 SDL-1.2
Option to fix bug #851
For some people setting the period size works better (and is what SDL 1.2.13 did), but for most people it's the same or worse. You can use an environment variable to pick which one you want.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 17 Oct 2009 06:55:17 +0000 |
| parents | 14f95e514408 |
| children | f5d3f7fa071d |
| rev | line source |
|---|---|
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1 /* |
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2 SDL - Simple DirectMedia Layer |
| 4159 | 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 Stéphan Kochen |
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20 stephan@kochen.nl |
| 4211 | 21 |
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22 Based on parts of the ALSA and ESounD output drivers. |
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23 */ |
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24 #include "SDL_config.h" |
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25 |
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26 /* Allow access to an PulseAudio network stream mixing buffer */ |
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27 |
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28 #include <sys/types.h> |
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29 #include <unistd.h> |
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30 #include <signal.h> |
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31 #include <errno.h> |
| 4216 | 32 #include <pulse/pulseaudio.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); |
| 4216 | 58 static void PULSE_WaitDone(_THIS); |
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59 |
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60 #ifdef SDL_AUDIO_DRIVER_PULSE_DYNAMIC |
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61 |
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62 static const char *pulse_library = SDL_AUDIO_DRIVER_PULSE_DYNAMIC; |
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63 static void *pulse_handle = NULL; |
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64 static int pulse_loaded = 0; |
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65 |
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66 static pa_simple* (*SDL_NAME(pa_simple_new))( |
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67 const char *server, |
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68 const char *name, |
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69 pa_stream_direction_t dir, |
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70 const char *dev, |
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71 const char *stream_name, |
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72 const pa_sample_spec *ss, |
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73 const pa_channel_map *map, |
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74 const pa_buffer_attr *attr, |
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75 int *error |
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76 ); |
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77 static void (*SDL_NAME(pa_simple_free))(pa_simple *s); |
| 4216 | 78 |
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79 static pa_channel_map* (*SDL_NAME(pa_channel_map_init_auto))( |
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80 pa_channel_map *m, |
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81 unsigned channels, |
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82 pa_channel_map_def_t def |
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83 ); |
| 4211 | 84 |
| 4216 | 85 pa_mainloop * (*SDL_NAME(pa_mainloop_new))(void); |
| 86 pa_mainloop_api * (*SDL_NAME(pa_mainloop_get_api))(pa_mainloop *m); | |
| 87 int (*SDL_NAME(pa_mainloop_iterate))(pa_mainloop *m, int block, int *retval); | |
| 88 void (*SDL_NAME(pa_mainloop_free))(pa_mainloop *m); | |
| 89 | |
| 90 pa_operation_state_t (*SDL_NAME(pa_operation_get_state))(pa_operation *o); | |
| 91 void (*SDL_NAME(pa_operation_cancel))(pa_operation *o); | |
| 92 void (*SDL_NAME(pa_operation_unref))(pa_operation *o); | |
| 93 | |
| 94 pa_context * (*SDL_NAME(pa_context_new))( | |
| 95 pa_mainloop_api *m, const char *name); | |
| 96 int (*SDL_NAME(pa_context_connect))( | |
| 97 pa_context *c, const char *server, | |
| 98 pa_context_flags_t flags, const pa_spawn_api *api); | |
| 99 pa_context_state_t (*SDL_NAME(pa_context_get_state))(pa_context *c); | |
| 100 void (*SDL_NAME(pa_context_disconnect))(pa_context *c); | |
| 101 void (*SDL_NAME(pa_context_unref))(pa_context *c); | |
| 102 | |
| 103 pa_stream * (*SDL_NAME(pa_stream_new))(pa_context *c, | |
| 104 const char *name, const pa_sample_spec *ss, const pa_channel_map *map); | |
| 105 int (*SDL_NAME(pa_stream_connect_playback))(pa_stream *s, const char *dev, | |
| 106 const pa_buffer_attr *attr, pa_stream_flags_t flags, | |
| 107 pa_cvolume *volume, pa_stream *sync_stream); | |
| 108 pa_stream_state_t (*SDL_NAME(pa_stream_get_state))(pa_stream *s); | |
| 109 size_t (*SDL_NAME(pa_stream_writable_size))(pa_stream *s); | |
| 110 int (*SDL_NAME(pa_stream_write))(pa_stream *s, const void *data, size_t nbytes, | |
| 111 pa_free_cb_t free_cb, int64_t offset, pa_seek_mode_t seek); | |
| 112 pa_operation * (*SDL_NAME(pa_stream_drain))(pa_stream *s, | |
| 113 pa_stream_success_cb_t cb, void *userdata); | |
| 114 int (*SDL_NAME(pa_stream_disconnect))(pa_stream *s); | |
| 115 void (*SDL_NAME(pa_stream_unref))(pa_stream *s); | |
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116 |
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117 static struct { |
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118 const char *name; |
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119 void **func; |
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120 } pulse_functions[] = { |
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121 { "pa_simple_new", |
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122 (void **)&SDL_NAME(pa_simple_new) }, |
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123 { "pa_simple_free", |
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124 (void **)&SDL_NAME(pa_simple_free) }, |
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125 { "pa_channel_map_init_auto", |
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126 (void **)&SDL_NAME(pa_channel_map_init_auto) }, |
| 4216 | 127 { "pa_mainloop_new", |
| 128 (void **)&SDL_NAME(pa_mainloop_new) }, | |
| 129 { "pa_mainloop_get_api", | |
| 130 (void **)&SDL_NAME(pa_mainloop_get_api) }, | |
| 131 { "pa_mainloop_iterate", | |
| 132 (void **)&SDL_NAME(pa_mainloop_iterate) }, | |
| 133 { "pa_mainloop_free", | |
| 134 (void **)&SDL_NAME(pa_mainloop_free) }, | |
| 135 { "pa_operation_get_state", | |
| 136 (void **)&SDL_NAME(pa_operation_get_state) }, | |
| 137 { "pa_operation_cancel", | |
| 138 (void **)&SDL_NAME(pa_operation_cancel) }, | |
| 139 { "pa_operation_unref", | |
| 140 (void **)&SDL_NAME(pa_operation_unref) }, | |
| 141 { "pa_context_new", | |
| 142 (void **)&SDL_NAME(pa_context_new) }, | |
| 143 { "pa_context_connect", | |
| 144 (void **)&SDL_NAME(pa_context_connect) }, | |
| 145 { "pa_context_get_state", | |
| 146 (void **)&SDL_NAME(pa_context_get_state) }, | |
| 147 { "pa_context_disconnect", | |
| 148 (void **)&SDL_NAME(pa_context_disconnect) }, | |
| 149 { "pa_context_unref", | |
| 150 (void **)&SDL_NAME(pa_context_unref) }, | |
| 151 { "pa_stream_new", | |
| 152 (void **)&SDL_NAME(pa_stream_new) }, | |
| 153 { "pa_stream_connect_playback", | |
| 154 (void **)&SDL_NAME(pa_stream_connect_playback) }, | |
| 155 { "pa_stream_get_state", | |
| 156 (void **)&SDL_NAME(pa_stream_get_state) }, | |
| 157 { "pa_stream_writable_size", | |
| 158 (void **)&SDL_NAME(pa_stream_writable_size) }, | |
| 159 { "pa_stream_write", | |
| 160 (void **)&SDL_NAME(pa_stream_write) }, | |
| 161 { "pa_stream_drain", | |
| 162 (void **)&SDL_NAME(pa_stream_drain) }, | |
| 163 { "pa_stream_disconnect", | |
| 164 (void **)&SDL_NAME(pa_stream_disconnect) }, | |
| 165 { "pa_stream_unref", | |
| 166 (void **)&SDL_NAME(pa_stream_unref) }, | |
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167 }; |
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168 |
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169 static void UnloadPulseLibrary() |
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170 { |
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171 if ( pulse_loaded ) { |
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172 SDL_UnloadObject(pulse_handle); |
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173 pulse_handle = NULL; |
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parents:
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174 pulse_loaded = 0; |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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175 } |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
176 } |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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177 |
|
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parents:
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changeset
|
178 static int LoadPulseLibrary(void) |
|
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179 { |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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180 int i, retval = -1; |
|
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181 |
|
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Ryan C. Gordon <icculus@icculus.org>
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182 pulse_handle = SDL_LoadObject(pulse_library); |
|
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|
183 if ( pulse_handle ) { |
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184 pulse_loaded = 1; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
185 retval = 0; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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changeset
|
186 for ( i=0; i<SDL_arraysize(pulse_functions); ++i ) { |
|
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187 *pulse_functions[i].func = SDL_LoadFunction(pulse_handle, pulse_functions[i].name); |
|
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188 if ( !*pulse_functions[i].func ) { |
|
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189 retval = -1; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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190 UnloadPulseLibrary(); |
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parents:
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191 break; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
192 } |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
193 } |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
194 } |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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195 return retval; |
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Ryan C. Gordon <icculus@icculus.org>
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|
196 } |
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197 |
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198 #else |
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199 |
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200 static void UnloadPulseLibrary() |
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201 { |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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202 return; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
203 } |
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204 |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
205 static int LoadPulseLibrary(void) |
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206 { |
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207 return 0; |
|
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Ryan C. Gordon <icculus@icculus.org>
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208 } |
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209 |
|
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|
210 #endif /* SDL_AUDIO_DRIVER_PULSE_DYNAMIC */ |
|
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211 |
|
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212 /* Audio driver bootstrap functions */ |
|
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213 |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
214 static int Audio_Available(void) |
|
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215 { |
|
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Ryan C. Gordon <icculus@icculus.org>
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216 pa_sample_spec paspec; |
|
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217 pa_simple *connection; |
|
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218 int available; |
|
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|
219 |
|
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220 available = 0; |
|
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Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
221 if ( LoadPulseLibrary() < 0 ) { |
|
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Committed PulseAudio driver. Thanks, Stephan!
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parents:
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222 return available; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
223 } |
| 4211 | 224 |
|
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225 /* Connect with a dummy format. */ |
|
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|
226 paspec.format = PA_SAMPLE_U8; |
|
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227 paspec.rate = 11025; |
|
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228 paspec.channels = 1; |
|
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229 connection = SDL_NAME(pa_simple_new)( |
| 4211 | 230 NULL, /* server */ |
|
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|
231 "Test stream", /* application name */ |
|
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|
232 PA_STREAM_PLAYBACK, /* playback mode */ |
| 4211 | 233 NULL, /* device on the server */ |
|
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|
234 "Simple DirectMedia Layer", /* stream description */ |
|
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Committed PulseAudio driver. Thanks, Stephan!
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|
235 &paspec, /* sample format spec */ |
|
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236 NULL, /* channel map */ |
|
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parents:
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|
237 NULL, /* buffering attributes */ |
|
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|
238 NULL /* error code */ |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
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|
239 ); |
|
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Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
240 if ( connection != NULL ) { |
|
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Committed PulseAudio driver. Thanks, Stephan!
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parents:
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|
241 available = 1; |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
242 SDL_NAME(pa_simple_free)(connection); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
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|
243 } |
| 4211 | 244 |
|
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|
245 UnloadPulseLibrary(); |
|
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Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
246 return(available); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
247 } |
|
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parents:
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|
248 |
|
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changeset
|
249 static void Audio_DeleteDevice(SDL_AudioDevice *device) |
|
42e83d81224b
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parents:
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|
250 { |
|
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parents:
diff
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|
251 SDL_free(device->hidden); |
|
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|
252 SDL_free(device); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
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|
253 UnloadPulseLibrary(); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
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|
254 } |
|
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parents:
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|
255 |
|
42e83d81224b
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parents:
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|
256 static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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|
257 { |
|
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parents:
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|
258 SDL_AudioDevice *this; |
|
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|
259 |
|
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parents:
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|
260 /* Initialize all variables that we clean on shutdown */ |
|
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Committed PulseAudio driver. Thanks, Stephan!
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parents:
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changeset
|
261 LoadPulseLibrary(); |
|
42e83d81224b
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parents:
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|
262 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff
changeset
|
263 if ( this ) { |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
264 SDL_memset(this, 0, (sizeof *this)); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff
changeset
|
265 this->hidden = (struct SDL_PrivateAudioData *) |
|
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|
266 SDL_malloc((sizeof *this->hidden)); |
|
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Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff
changeset
|
267 } |
|
42e83d81224b
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
268 if ( (this == NULL) || (this->hidden == NULL) ) { |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff
changeset
|
269 SDL_OutOfMemory(); |
|
42e83d81224b
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parents:
diff
changeset
|
270 if ( this ) { |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
271 SDL_free(this); |
|
42e83d81224b
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
272 } |
|
42e83d81224b
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parents:
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|
273 return(0); |
|
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 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
|
42e83d81224b
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parents:
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|
276 |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
277 /* Set the function pointers */ |
|
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parents:
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|
278 this->OpenAudio = PULSE_OpenAudio; |
|
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|
279 this->WaitAudio = PULSE_WaitAudio; |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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|
280 this->PlayAudio = PULSE_PlayAudio; |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
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changeset
|
281 this->GetAudioBuf = PULSE_GetAudioBuf; |
|
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Committed PulseAudio driver. Thanks, Stephan!
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|
282 this->CloseAudio = PULSE_CloseAudio; |
| 4216 | 283 this->WaitDone = PULSE_WaitDone; |
|
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|
284 |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
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|
285 this->free = Audio_DeleteDevice; |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff
changeset
|
286 |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
287 return this; |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
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|
288 } |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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changeset
|
289 |
|
42e83d81224b
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
290 AudioBootStrap PULSE_bootstrap = { |
|
42e83d81224b
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parents:
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changeset
|
291 PULSE_DRIVER_NAME, "PulseAudio", |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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parents:
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|
292 Audio_Available, Audio_CreateDevice |
|
42e83d81224b
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
293 }; |
|
42e83d81224b
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parents:
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|
294 |
|
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parents:
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changeset
|
295 /* This function waits until it is possible to write a full sound buffer */ |
|
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|
296 static void PULSE_WaitAudio(_THIS) |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
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changeset
|
297 { |
| 4216 | 298 int size; |
| 299 while(1) { | |
| 300 if (SDL_NAME(pa_context_get_state)(context) != PA_CONTEXT_READY || | |
| 301 SDL_NAME(pa_stream_get_state)(stream) != PA_STREAM_READY || | |
| 302 SDL_NAME(pa_mainloop_iterate)(mainloop, 1, NULL) < 0) { | |
| 303 this->enabled = 0; | |
| 304 return; | |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
305 } |
| 4216 | 306 size = SDL_NAME(pa_stream_writable_size)(stream); |
| 307 if (size >= mixlen) | |
| 308 return; | |
|
3939
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
309 } |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
310 } |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
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changeset
|
311 |
|
42e83d81224b
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
312 static void PULSE_PlayAudio(_THIS) |
|
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313 { |
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314 /* Write the audio data */ |
| 4216 | 315 if (SDL_NAME(pa_stream_write)(stream, mixbuf, mixlen, NULL, 0LL, PA_SEEK_RELATIVE) < 0) |
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316 this->enabled = 0; |
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317 } |
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318 |
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319 static Uint8 *PULSE_GetAudioBuf(_THIS) |
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320 { |
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321 return(mixbuf); |
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322 } |
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323 |
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324 static void PULSE_CloseAudio(_THIS) |
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325 { |
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326 if ( mixbuf != NULL ) { |
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327 SDL_FreeAudioMem(mixbuf); |
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328 mixbuf = NULL; |
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329 } |
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330 if ( stream != NULL ) { |
| 4216 | 331 SDL_NAME(pa_stream_disconnect)(stream); |
| 332 SDL_NAME(pa_stream_unref)(stream); | |
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333 stream = NULL; |
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334 } |
| 4216 | 335 if (context != NULL) { |
| 336 SDL_NAME(pa_context_disconnect)(context); | |
| 337 SDL_NAME(pa_context_unref)(context); | |
| 338 context = NULL; | |
| 339 } | |
| 340 if (mainloop != NULL) { | |
| 341 SDL_NAME(pa_mainloop_free)(mainloop); | |
| 342 mainloop = NULL; | |
| 343 } | |
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344 } |
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345 |
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346 /* Try to get the name of the program */ |
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347 static char *get_progname(void) |
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348 { |
|
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349 #ifdef __LINUX__ |
|
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350 char *progname = NULL; |
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351 FILE *fp; |
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352 static char temp[BUFSIZ]; |
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353 |
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354 SDL_snprintf(temp, SDL_arraysize(temp), "/proc/%d/cmdline", getpid()); |
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355 fp = fopen(temp, "r"); |
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356 if ( fp != NULL ) { |
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357 if ( fgets(temp, sizeof(temp)-1, fp) ) { |
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358 progname = SDL_strrchr(temp, '/'); |
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359 if ( progname == NULL ) { |
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360 progname = temp; |
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361 } else { |
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362 progname = progname+1; |
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363 } |
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|
364 } |
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365 fclose(fp); |
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366 } |
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367 return(progname); |
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368 #elif defined(__NetBSD__) |
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369 return getprogname(); |
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370 #else |
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371 return("unknown"); |
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372 #endif |
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373 } |
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374 |
| 4216 | 375 static void stream_drain_complete(pa_stream *s, int success, void *userdata) { |
| 376 } | |
| 377 | |
| 378 static void PULSE_WaitDone(_THIS) | |
| 379 { | |
| 380 pa_operation *o; | |
| 381 | |
| 382 o = SDL_NAME(pa_stream_drain)(stream, stream_drain_complete, NULL); | |
| 383 if (!o) | |
| 384 return; | |
| 385 | |
| 386 while (SDL_NAME(pa_operation_get_state)(o) != PA_OPERATION_DONE) { | |
| 387 if (SDL_NAME(pa_context_get_state)(context) != PA_CONTEXT_READY || | |
| 388 SDL_NAME(pa_stream_get_state)(stream) != PA_STREAM_READY || | |
| 389 SDL_NAME(pa_mainloop_iterate)(mainloop, 1, NULL) < 0) { | |
| 390 SDL_NAME(pa_operation_cancel)(o); | |
| 391 break; | |
| 392 } | |
| 393 } | |
| 394 SDL_NAME(pa_operation_unref)(o); | |
| 395 } | |
| 396 | |
|
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397 static int PULSE_OpenAudio(_THIS, SDL_AudioSpec *spec) |
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398 { |
| 4216 | 399 int state; |
|
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400 Uint16 test_format; |
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401 pa_sample_spec paspec; |
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402 pa_buffer_attr paattr; |
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403 pa_channel_map pacmap; |
| 4216 | 404 pa_stream_flags_t flags = 0; |
| 4211 | 405 |
|
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|
406 paspec.format = PA_SAMPLE_INVALID; |
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407 for ( test_format = SDL_FirstAudioFormat(spec->format); test_format; ) { |
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408 switch ( test_format ) { |
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409 case AUDIO_U8: |
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|
410 paspec.format = PA_SAMPLE_U8; |
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411 break; |
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|
412 case AUDIO_S16LSB: |
|
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|
413 paspec.format = PA_SAMPLE_S16LE; |
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414 break; |
|
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|
415 case AUDIO_S16MSB: |
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|
416 paspec.format = PA_SAMPLE_S16BE; |
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417 break; |
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|
418 } |
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|
419 if ( paspec.format != PA_SAMPLE_INVALID ) |
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|
420 break; |
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|
421 } |
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|
422 if (paspec.format == PA_SAMPLE_INVALID ) { |
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423 SDL_SetError("Couldn't find any suitable audio formats"); |
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424 return(-1); |
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|
425 } |
|
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|
426 spec->format = test_format; |
| 4211 | 427 |
|
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428 paspec.channels = spec->channels; |
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|
429 paspec.rate = spec->freq; |
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430 |
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431 /* Calculate the final parameters for this audio specification */ |
| 4216 | 432 #ifdef PA_STREAM_ADJUST_LATENCY |
| 433 spec->samples /= 2; /* Mix in smaller chunck to avoid underruns */ | |
| 434 #endif | |
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|
435 SDL_CalculateAudioSpec(spec); |
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|
436 |
|
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|
437 /* Allocate mixing buffer */ |
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|
438 mixlen = spec->size; |
|
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|
439 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); |
|
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|
440 if ( mixbuf == NULL ) { |
|
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parents:
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|
441 return(-1); |
|
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parents:
diff
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|
442 } |
|
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|
443 SDL_memset(mixbuf, spec->silence, spec->size); |
| 4211 | 444 |
|
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|
445 /* Reduced prebuffering compared to the defaults. */ |
| 4216 | 446 #ifdef PA_STREAM_ADJUST_LATENCY |
| 447 paattr.tlength = mixlen * 4; /* 2x original requested bufsize */ | |
| 448 paattr.prebuf = -1; | |
| 449 paattr.maxlength = -1; | |
| 450 paattr.minreq = mixlen; /* -1 can lead to pa_stream_writable_size() | |
| 451 >= mixlen never becoming true */ | |
| 452 flags = PA_STREAM_ADJUST_LATENCY; | |
| 453 #else | |
| 4211 | 454 paattr.tlength = mixlen*2; |
| 455 paattr.prebuf = mixlen*2; | |
| 456 paattr.maxlength = mixlen*2; | |
| 4216 | 457 paattr.minreq = mixlen; |
| 458 #endif | |
| 4211 | 459 |
|
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|
460 /* The SDL ALSA output hints us that we use Windows' channel mapping */ |
|
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diff
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|
461 /* http://bugzilla.libsdl.org/show_bug.cgi?id=110 */ |
|
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|
462 SDL_NAME(pa_channel_map_init_auto)( |
|
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parents:
diff
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|
463 &pacmap, spec->channels, PA_CHANNEL_MAP_WAVEEX); |
| 4211 | 464 |
| 4216 | 465 /* Set up a new main loop */ |
| 466 if (!(mainloop = SDL_NAME(pa_mainloop_new)())) { | |
| 467 PULSE_CloseAudio(this); | |
| 468 SDL_SetError("pa_mainloop_new() failed"); | |
| 469 return(-1); | |
| 470 } | |
| 471 | |
| 472 mainloop_api = SDL_NAME(pa_mainloop_get_api)(mainloop); | |
| 473 if (!(context = SDL_NAME(pa_context_new)(mainloop_api, get_progname()))) { | |
| 474 PULSE_CloseAudio(this); | |
| 475 SDL_SetError("pa_context_new() failed"); | |
| 476 return(-1); | |
| 477 } | |
| 478 | |
|
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|
479 /* Connect to the PulseAudio server */ |
| 4216 | 480 if (SDL_NAME(pa_context_connect)(context, NULL, 0, NULL) < 0) { |
| 481 PULSE_CloseAudio(this); | |
| 482 SDL_SetError("Could not setup connection to PulseAudio"); | |
| 483 return(-1); | |
| 484 } | |
| 485 | |
| 486 do { | |
| 487 if (SDL_NAME(pa_mainloop_iterate)(mainloop, 1, NULL) < 0) { | |
| 488 PULSE_CloseAudio(this); | |
| 489 SDL_SetError("pa_mainloop_iterate() failed"); | |
| 490 return(-1); | |
| 491 } | |
| 492 state = SDL_NAME(pa_context_get_state)(context); | |
| 493 if (!PA_CONTEXT_IS_GOOD(state)) { | |
| 494 PULSE_CloseAudio(this); | |
| 495 SDL_SetError("Could not connect to PulseAudio"); | |
| 496 return(-1); | |
| 497 } | |
| 498 } while (state != PA_CONTEXT_READY); | |
| 499 | |
| 500 stream = SDL_NAME(pa_stream_new)( | |
| 501 context, | |
|
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|
502 "Simple DirectMedia Layer", /* stream description */ |
|
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parents:
diff
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|
503 &paspec, /* sample format spec */ |
| 4216 | 504 &pacmap /* channel map */ |
|
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diff
changeset
|
505 ); |
|
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Committed PulseAudio driver. Thanks, Stephan!
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parents:
diff
changeset
|
506 if ( stream == NULL ) { |
|
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parents:
diff
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|
507 PULSE_CloseAudio(this); |
| 4216 | 508 SDL_SetError("Could not setup PulseAudio stream"); |
| 509 return(-1); | |
| 510 } | |
| 511 | |
| 512 if (SDL_NAME(pa_stream_connect_playback)(stream, NULL, &paattr, flags, | |
| 513 NULL, NULL) < 0) { | |
| 514 PULSE_CloseAudio(this); | |
| 515 SDL_SetError("Could not connect PulseAudio stream"); | |
|
3939
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
516 return(-1); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
517 } |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
518 |
| 4216 | 519 do { |
| 520 if (SDL_NAME(pa_mainloop_iterate)(mainloop, 1, NULL) < 0) { | |
| 521 PULSE_CloseAudio(this); | |
| 522 SDL_SetError("pa_mainloop_iterate() failed"); | |
| 523 return(-1); | |
| 524 } | |
| 525 state = SDL_NAME(pa_stream_get_state)(stream); | |
| 526 if (!PA_STREAM_IS_GOOD(state)) { | |
| 527 PULSE_CloseAudio(this); | |
| 528 SDL_SetError("Could not create to PulseAudio stream"); | |
| 529 return(-1); | |
| 530 } | |
| 531 } while (state != PA_STREAM_READY); | |
| 4211 | 532 |
|
3939
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
533 return(0); |
|
42e83d81224b
Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
534 } |