diff options
Diffstat (limited to 'apps/plugins/sdl/src/audio/esd')
-rw-r--r-- | apps/plugins/sdl/src/audio/esd/SDL_esdaudio.c | 323 | ||||
-rw-r--r-- | apps/plugins/sdl/src/audio/esd/SDL_esdaudio.h | 57 |
2 files changed, 0 insertions, 380 deletions
diff --git a/apps/plugins/sdl/src/audio/esd/SDL_esdaudio.c b/apps/plugins/sdl/src/audio/esd/SDL_esdaudio.c deleted file mode 100644 index f54b0ea9c5..0000000000 --- a/apps/plugins/sdl/src/audio/esd/SDL_esdaudio.c +++ /dev/null | |||
@@ -1,323 +0,0 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | /* Allow access to an ESD network stream mixing buffer */ | ||
25 | |||
26 | #include <sys/types.h> | ||
27 | #include <unistd.h> | ||
28 | #include <signal.h> | ||
29 | #include <errno.h> | ||
30 | #include <esd.h> | ||
31 | |||
32 | #include "SDL_timer.h" | ||
33 | #include "SDL_audio.h" | ||
34 | #include "../SDL_audiomem.h" | ||
35 | #include "../SDL_audio_c.h" | ||
36 | #include "../SDL_audiodev_c.h" | ||
37 | #include "SDL_esdaudio.h" | ||
38 | |||
39 | #ifdef SDL_AUDIO_DRIVER_ESD_DYNAMIC | ||
40 | #include "SDL_name.h" | ||
41 | #include "SDL_loadso.h" | ||
42 | #else | ||
43 | #define SDL_NAME(X) X | ||
44 | #endif | ||
45 | |||
46 | /* The tag name used by ESD audio */ | ||
47 | #define ESD_DRIVER_NAME "esd" | ||
48 | |||
49 | /* Audio driver functions */ | ||
50 | static int ESD_OpenAudio(_THIS, SDL_AudioSpec *spec); | ||
51 | static void ESD_WaitAudio(_THIS); | ||
52 | static void ESD_PlayAudio(_THIS); | ||
53 | static Uint8 *ESD_GetAudioBuf(_THIS); | ||
54 | static void ESD_CloseAudio(_THIS); | ||
55 | |||
56 | #ifdef SDL_AUDIO_DRIVER_ESD_DYNAMIC | ||
57 | |||
58 | static const char *esd_library = SDL_AUDIO_DRIVER_ESD_DYNAMIC; | ||
59 | static void *esd_handle = NULL; | ||
60 | static int esd_loaded = 0; | ||
61 | |||
62 | static int (*SDL_NAME(esd_open_sound))( const char *host ); | ||
63 | static int (*SDL_NAME(esd_close))( int esd ); | ||
64 | static int (*SDL_NAME(esd_play_stream))( esd_format_t format, int rate, | ||
65 | const char *host, const char *name ); | ||
66 | static struct { | ||
67 | const char *name; | ||
68 | void **func; | ||
69 | } esd_functions[] = { | ||
70 | { "esd_open_sound", (void **)&SDL_NAME(esd_open_sound) }, | ||
71 | { "esd_close", (void **)&SDL_NAME(esd_close) }, | ||
72 | { "esd_play_stream", (void **)&SDL_NAME(esd_play_stream) }, | ||
73 | }; | ||
74 | |||
75 | static void UnloadESDLibrary() | ||
76 | { | ||
77 | if ( esd_loaded ) { | ||
78 | SDL_UnloadObject(esd_handle); | ||
79 | esd_handle = NULL; | ||
80 | esd_loaded = 0; | ||
81 | } | ||
82 | } | ||
83 | |||
84 | static int LoadESDLibrary(void) | ||
85 | { | ||
86 | int i, retval = -1; | ||
87 | |||
88 | esd_handle = SDL_LoadObject(esd_library); | ||
89 | if ( esd_handle ) { | ||
90 | esd_loaded = 1; | ||
91 | retval = 0; | ||
92 | for ( i=0; i<SDL_arraysize(esd_functions); ++i ) { | ||
93 | *esd_functions[i].func = SDL_LoadFunction(esd_handle, esd_functions[i].name); | ||
94 | if ( !*esd_functions[i].func ) { | ||
95 | retval = -1; | ||
96 | UnloadESDLibrary(); | ||
97 | break; | ||
98 | } | ||
99 | } | ||
100 | } | ||
101 | return retval; | ||
102 | } | ||
103 | |||
104 | #else | ||
105 | |||
106 | static void UnloadESDLibrary() | ||
107 | { | ||
108 | return; | ||
109 | } | ||
110 | |||
111 | static int LoadESDLibrary(void) | ||
112 | { | ||
113 | return 0; | ||
114 | } | ||
115 | |||
116 | #endif /* SDL_AUDIO_DRIVER_ESD_DYNAMIC */ | ||
117 | |||
118 | /* Audio driver bootstrap functions */ | ||
119 | |||
120 | static int Audio_Available(void) | ||
121 | { | ||
122 | int connection; | ||
123 | int available; | ||
124 | |||
125 | available = 0; | ||
126 | if ( LoadESDLibrary() < 0 ) { | ||
127 | return available; | ||
128 | } | ||
129 | connection = SDL_NAME(esd_open_sound)(NULL); | ||
130 | if ( connection >= 0 ) { | ||
131 | available = 1; | ||
132 | SDL_NAME(esd_close)(connection); | ||
133 | } | ||
134 | UnloadESDLibrary(); | ||
135 | return(available); | ||
136 | } | ||
137 | |||
138 | static void Audio_DeleteDevice(SDL_AudioDevice *device) | ||
139 | { | ||
140 | SDL_free(device->hidden); | ||
141 | SDL_free(device); | ||
142 | UnloadESDLibrary(); | ||
143 | } | ||
144 | |||
145 | static SDL_AudioDevice *Audio_CreateDevice(int devindex) | ||
146 | { | ||
147 | SDL_AudioDevice *this; | ||
148 | |||
149 | /* Initialize all variables that we clean on shutdown */ | ||
150 | LoadESDLibrary(); | ||
151 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); | ||
152 | if ( this ) { | ||
153 | SDL_memset(this, 0, (sizeof *this)); | ||
154 | this->hidden = (struct SDL_PrivateAudioData *) | ||
155 | SDL_malloc((sizeof *this->hidden)); | ||
156 | } | ||
157 | if ( (this == NULL) || (this->hidden == NULL) ) { | ||
158 | SDL_OutOfMemory(); | ||
159 | if ( this ) { | ||
160 | SDL_free(this); | ||
161 | } | ||
162 | return(0); | ||
163 | } | ||
164 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); | ||
165 | audio_fd = -1; | ||
166 | |||
167 | /* Set the function pointers */ | ||
168 | this->OpenAudio = ESD_OpenAudio; | ||
169 | this->WaitAudio = ESD_WaitAudio; | ||
170 | this->PlayAudio = ESD_PlayAudio; | ||
171 | this->GetAudioBuf = ESD_GetAudioBuf; | ||
172 | this->CloseAudio = ESD_CloseAudio; | ||
173 | |||
174 | this->free = Audio_DeleteDevice; | ||
175 | |||
176 | return this; | ||
177 | } | ||
178 | |||
179 | AudioBootStrap ESD_bootstrap = { | ||
180 | ESD_DRIVER_NAME, "Enlightened Sound Daemon", | ||
181 | Audio_Available, Audio_CreateDevice | ||
182 | }; | ||
183 | |||
184 | /* This function waits until it is possible to write a full sound buffer */ | ||
185 | static void ESD_WaitAudio(_THIS) | ||
186 | { | ||
187 | Sint32 ticks; | ||
188 | |||
189 | /* Check to see if the thread-parent process is still alive */ | ||
190 | { static int cnt = 0; | ||
191 | /* Note that this only works with thread implementations | ||
192 | that use a different process id for each thread. | ||
193 | */ | ||
194 | if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ | ||
195 | if ( kill(parent, 0) < 0 ) { | ||
196 | this->enabled = 0; | ||
197 | } | ||
198 | } | ||
199 | } | ||
200 | |||
201 | /* Use timer for general audio synchronization */ | ||
202 | ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; | ||
203 | if ( ticks > 0 ) { | ||
204 | SDL_Delay(ticks); | ||
205 | } | ||
206 | } | ||
207 | |||
208 | static void ESD_PlayAudio(_THIS) | ||
209 | { | ||
210 | int written; | ||
211 | |||
212 | /* Write the audio data, checking for EAGAIN on broken audio drivers */ | ||
213 | do { | ||
214 | written = write(audio_fd, mixbuf, mixlen); | ||
215 | if ( (written < 0) && ((errno == 0) || (errno == EAGAIN)) ) { | ||
216 | SDL_Delay(1); /* Let a little CPU time go by */ | ||
217 | } | ||
218 | } while ( (written < 0) && | ||
219 | ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)) ); | ||
220 | |||
221 | /* Set the next write frame */ | ||
222 | next_frame += frame_ticks; | ||
223 | |||
224 | /* If we couldn't write, assume fatal error for now */ | ||
225 | if ( written < 0 ) { | ||
226 | this->enabled = 0; | ||
227 | } | ||
228 | } | ||
229 | |||
230 | static Uint8 *ESD_GetAudioBuf(_THIS) | ||
231 | { | ||
232 | return(mixbuf); | ||
233 | } | ||
234 | |||
235 | static void ESD_CloseAudio(_THIS) | ||
236 | { | ||
237 | if ( mixbuf != NULL ) { | ||
238 | SDL_FreeAudioMem(mixbuf); | ||
239 | mixbuf = NULL; | ||
240 | } | ||
241 | if ( audio_fd >= 0 ) { | ||
242 | SDL_NAME(esd_close)(audio_fd); | ||
243 | audio_fd = -1; | ||
244 | } | ||
245 | } | ||
246 | |||
247 | /* Try to get the name of the program */ | ||
248 | static char *get_progname(void) | ||
249 | { | ||
250 | char *progname = NULL; | ||
251 | #ifdef __LINUX__ | ||
252 | FILE *fp; | ||
253 | static char temp[BUFSIZ]; | ||
254 | |||
255 | SDL_snprintf(temp, SDL_arraysize(temp), "/proc/%d/cmdline", getpid()); | ||
256 | fp = fopen(temp, "r"); | ||
257 | if ( fp != NULL ) { | ||
258 | if ( fgets(temp, sizeof(temp)-1, fp) ) { | ||
259 | progname = SDL_strrchr(temp, '/'); | ||
260 | if ( progname == NULL ) { | ||
261 | progname = temp; | ||
262 | } else { | ||
263 | progname = progname+1; | ||
264 | } | ||
265 | } | ||
266 | fclose(fp); | ||
267 | } | ||
268 | #endif | ||
269 | return(progname); | ||
270 | } | ||
271 | |||
272 | static int ESD_OpenAudio(_THIS, SDL_AudioSpec *spec) | ||
273 | { | ||
274 | esd_format_t format; | ||
275 | |||
276 | /* Convert audio spec to the ESD audio format */ | ||
277 | format = (ESD_STREAM | ESD_PLAY); | ||
278 | switch ( spec->format & 0xFF ) { | ||
279 | case 8: | ||
280 | format |= ESD_BITS8; | ||
281 | break; | ||
282 | case 16: | ||
283 | format |= ESD_BITS16; | ||
284 | break; | ||
285 | default: | ||
286 | SDL_SetError("Unsupported ESD audio format"); | ||
287 | return(-1); | ||
288 | } | ||
289 | if ( spec->channels == 1 ) { | ||
290 | format |= ESD_MONO; | ||
291 | } else { | ||
292 | format |= ESD_STEREO; | ||
293 | } | ||
294 | #if 0 | ||
295 | spec->samples = ESD_BUF_SIZE; /* Darn, no way to change this yet */ | ||
296 | #endif | ||
297 | |||
298 | /* Open a connection to the ESD audio server */ | ||
299 | audio_fd = SDL_NAME(esd_play_stream)(format, spec->freq, NULL, get_progname()); | ||
300 | if ( audio_fd < 0 ) { | ||
301 | SDL_SetError("Couldn't open ESD connection"); | ||
302 | return(-1); | ||
303 | } | ||
304 | |||
305 | /* Calculate the final parameters for this audio specification */ | ||
306 | SDL_CalculateAudioSpec(spec); | ||
307 | frame_ticks = (float)(spec->samples*1000)/spec->freq; | ||
308 | next_frame = SDL_GetTicks()+frame_ticks; | ||
309 | |||
310 | /* Allocate mixing buffer */ | ||
311 | mixlen = spec->size; | ||
312 | mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); | ||
313 | if ( mixbuf == NULL ) { | ||
314 | return(-1); | ||
315 | } | ||
316 | SDL_memset(mixbuf, spec->silence, spec->size); | ||
317 | |||
318 | /* Get the parent process id (we're the parent of the audio thread) */ | ||
319 | parent = getpid(); | ||
320 | |||
321 | /* We're ready to rock and roll. :-) */ | ||
322 | return(0); | ||
323 | } | ||
diff --git a/apps/plugins/sdl/src/audio/esd/SDL_esdaudio.h b/apps/plugins/sdl/src/audio/esd/SDL_esdaudio.h deleted file mode 100644 index da4ae6a04b..0000000000 --- a/apps/plugins/sdl/src/audio/esd/SDL_esdaudio.h +++ /dev/null | |||
@@ -1,57 +0,0 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | #ifndef _SDL_esdaudio_h | ||
25 | #define _SDL_esdaudio_h | ||
26 | |||
27 | #include "../SDL_sysaudio.h" | ||
28 | |||
29 | /* Hidden "this" pointer for the video functions */ | ||
30 | #define _THIS SDL_AudioDevice *this | ||
31 | |||
32 | struct SDL_PrivateAudioData { | ||
33 | /* The file descriptor for the audio device */ | ||
34 | int audio_fd; | ||
35 | |||
36 | /* The parent process id, to detect when application quits */ | ||
37 | pid_t parent; | ||
38 | |||
39 | /* Raw mixing buffer */ | ||
40 | Uint8 *mixbuf; | ||
41 | int mixlen; | ||
42 | |||
43 | /* Support for audio timing using a timer */ | ||
44 | float frame_ticks; | ||
45 | float next_frame; | ||
46 | }; | ||
47 | #define FUDGE_TICKS 10 /* The scheduler overhead ticks per frame */ | ||
48 | |||
49 | /* Old variable names */ | ||
50 | #define audio_fd (this->hidden->audio_fd) | ||
51 | #define parent (this->hidden->parent) | ||
52 | #define mixbuf (this->hidden->mixbuf) | ||
53 | #define mixlen (this->hidden->mixlen) | ||
54 | #define frame_ticks (this->hidden->frame_ticks) | ||
55 | #define next_frame (this->hidden->next_frame) | ||
56 | |||
57 | #endif /* _SDL_esdaudio_h */ | ||