VirtualBox

source: vbox/trunk/src/VBox/Devices/Audio/pulse_stubs.c@ 60066

Last change on this file since 60066 was 59987, checked in by vboxsync, 9 years ago

Audio: Decoupled backend sinks and sources from the maximum of concurrent streams a backend can handle. Also, added some more enumeration code to the ALSA, PulseAudio and OSS backends, which later also can be used for configuration change callbacks. Some function renaming.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 10.8 KB
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1/* $Id: pulse_stubs.c 59987 2016-03-11 12:03:37Z vboxsync $ */
2/** @file
3 * Stubs for libpulse.
4 */
5
6/*
7 * Copyright (C) 2006-2016 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
18#include <iprt/assert.h>
19#include <iprt/ldr.h>
20#include <VBox/log.h>
21#include <VBox/err.h>
22
23#include <pulse/pulseaudio.h>
24
25#include "pulse_stubs.h"
26
27#define VBOX_PULSE_LIB "libpulse.so.0"
28
29#define PROXY_STUB(function, rettype, signature, shortsig) \
30 static rettype (*g_pfn_ ## function) signature; \
31 \
32 rettype VBox_##function signature; \
33 rettype VBox_##function signature \
34 { \
35 return g_pfn_ ## function shortsig; \
36 }
37
38#define PROXY_STUB_VOID(function, signature, shortsig) \
39 static void (*g_pfn_ ## function) signature; \
40 \
41 void VBox_##function signature; \
42 void VBox_##function signature \
43 { \
44 g_pfn_ ## function shortsig; \
45 }
46
47#if PA_PROTOCOL_VERSION >= 16
48PROXY_STUB (pa_stream_connect_playback, int,
49 (pa_stream *s, const char *dev, const pa_buffer_attr *attr,
50 pa_stream_flags_t flags, const pa_cvolume *volume, pa_stream *sync_stream),
51 (s, dev, attr, flags, volume, sync_stream))
52#else
53PROXY_STUB (pa_stream_connect_playback, int,
54 (pa_stream *s, const char *dev, const pa_buffer_attr *attr,
55 pa_stream_flags_t flags, pa_cvolume *volume, pa_stream *sync_stream),
56 (s, dev, attr, flags, volume, sync_stream))
57#endif
58PROXY_STUB (pa_stream_connect_record, int,
59 (pa_stream *s, const char *dev, const pa_buffer_attr *attr,
60 pa_stream_flags_t flags),
61 (s, dev, attr, flags))
62PROXY_STUB (pa_stream_disconnect, int,
63 (pa_stream *s),
64 (s))
65PROXY_STUB (pa_stream_get_sample_spec, const pa_sample_spec*,
66 (pa_stream *s),
67 (s))
68PROXY_STUB_VOID(pa_stream_set_latency_update_callback,
69 (pa_stream *p, pa_stream_notify_cb_t cb, void *userdata),
70 (p, cb, userdata))
71PROXY_STUB (pa_stream_write, int,
72 (pa_stream *p, const void *data, size_t bytes, pa_free_cb_t free_cb,
73 int64_t offset, pa_seek_mode_t seek),
74 (p, data, bytes, free_cb, offset, seek))
75PROXY_STUB_VOID(pa_stream_unref,
76 (pa_stream *s),
77 (s))
78PROXY_STUB (pa_stream_get_state, pa_stream_state_t,
79 (pa_stream *p),
80 (p))
81PROXY_STUB_VOID(pa_stream_set_state_callback,
82 (pa_stream *s, pa_stream_notify_cb_t cb, void *userdata),
83 (s, cb, userdata))
84PROXY_STUB (pa_stream_flush, pa_operation*,
85 (pa_stream *s, pa_stream_success_cb_t cb, void *userdata),
86 (s, cb, userdata))
87PROXY_STUB (pa_stream_drain, pa_operation*,
88 (pa_stream *s, pa_stream_success_cb_t cb, void *userdata),
89 (s, cb, userdata))
90PROXY_STUB (pa_stream_trigger, pa_operation*,
91 (pa_stream *s, pa_stream_success_cb_t cb, void *userdata),
92 (s, cb, userdata))
93PROXY_STUB (pa_stream_new, pa_stream*,
94 (pa_context *c, const char *name, const pa_sample_spec *ss,
95 const pa_channel_map *map),
96 (c, name, ss, map))
97PROXY_STUB (pa_stream_get_buffer_attr, const pa_buffer_attr*,
98 (pa_stream *s),
99 (s))
100PROXY_STUB (pa_stream_peek, int,
101 (pa_stream *p, const void **data, size_t *bytes),
102 (p, data, bytes))
103PROXY_STUB (pa_stream_cork, pa_operation*,
104 (pa_stream *s, int b, pa_stream_success_cb_t cb, void *userdata),
105 (s, b, cb, userdata))
106PROXY_STUB (pa_stream_drop, int,
107 (pa_stream *p),
108 (p))
109PROXY_STUB (pa_stream_writable_size, size_t,
110 (pa_stream *p),
111 (p))
112PROXY_STUB (pa_context_connect, int,
113 (pa_context *c, const char *server, pa_context_flags_t flags, const pa_spawn_api *api),
114 (c, server, flags, api))
115PROXY_STUB_VOID(pa_context_disconnect,
116 (pa_context *c),
117 (c))
118PROXY_STUB (pa_context_get_server_info, pa_operation*,
119 (pa_context *c, const char *name, pa_server_info_cb_t cb, void *userdata),
120 (c, name, cb, userdata))
121PROXY_STUB (pa_context_get_sink_info_by_name, pa_operation*,
122 (pa_context *c, const char *name, pa_sink_info_cb_t cb, void *userdata),
123 (c, name, cb, userdata))
124PROXY_STUB (pa_context_get_source_info_by_name, pa_operation*,
125 (pa_context *c, const char *name, pa_source_info_cb_t cb, void *userdata),
126 (c, name, cb, userdata))
127PROXY_STUB (pa_context_get_state, pa_context_state_t,
128 (pa_context *c),
129 (c))
130PROXY_STUB_VOID(pa_context_unref,
131 (pa_context *c),
132 (c))
133PROXY_STUB (pa_context_errno, int,
134 (pa_context *c),
135 (c))
136PROXY_STUB (pa_context_new, pa_context*,
137 (pa_mainloop_api *mainloop, const char *name),
138 (mainloop, name))
139PROXY_STUB_VOID(pa_context_set_state_callback,
140 (pa_context *c, pa_context_notify_cb_t cb, void *userdata),
141 (c, cb, userdata))
142PROXY_STUB_VOID(pa_threaded_mainloop_stop,
143 (pa_threaded_mainloop *m),
144 (m))
145PROXY_STUB (pa_threaded_mainloop_get_api, pa_mainloop_api*,
146 (pa_threaded_mainloop *m),
147 (m))
148PROXY_STUB_VOID(pa_threaded_mainloop_free,
149 (pa_threaded_mainloop* m),
150 (m))
151PROXY_STUB_VOID(pa_threaded_mainloop_signal,
152 (pa_threaded_mainloop *m, int wait_for_accept),
153 (m, wait_for_accept))
154PROXY_STUB_VOID(pa_threaded_mainloop_unlock,
155 (pa_threaded_mainloop *m),
156 (m))
157PROXY_STUB (pa_threaded_mainloop_new, pa_threaded_mainloop *,
158 (void),
159 ())
160PROXY_STUB_VOID(pa_threaded_mainloop_wait,
161 (pa_threaded_mainloop *m),
162 (m))
163PROXY_STUB (pa_threaded_mainloop_start, int,
164 (pa_threaded_mainloop *m),
165 (m))
166PROXY_STUB_VOID(pa_threaded_mainloop_lock,
167 (pa_threaded_mainloop *m),
168 (m))
169PROXY_STUB (pa_bytes_per_second, size_t,
170 (const pa_sample_spec *spec),
171 (spec))
172PROXY_STUB (pa_frame_size, size_t,
173 (const pa_sample_spec *spec),
174 (spec))
175PROXY_STUB (pa_sample_format_to_string, const char*,
176 (pa_sample_format_t f),
177 (f))
178PROXY_STUB (pa_sample_spec_valid, int,
179 (const pa_sample_spec *spec),
180 (spec))
181PROXY_STUB (pa_channel_map_init_auto, pa_channel_map*,
182 (pa_channel_map *m, unsigned channels, pa_channel_map_def_t def),
183 (m, channels, def))
184PROXY_STUB_VOID(pa_operation_unref,
185 (pa_operation *o),
186 (o))
187PROXY_STUB (pa_operation_get_state, pa_operation_state_t,
188 (pa_operation *o),
189 (o))
190PROXY_STUB_VOID(pa_operation_cancel,
191 (pa_operation *o),
192 (o))
193PROXY_STUB (pa_strerror, const char*,
194 (int error),
195 (error))
196PROXY_STUB (pa_stream_readable_size, size_t,
197 (pa_stream *p),
198 (p))
199
200
201typedef struct
202{
203 const char *name;
204 void (**fn)(void);
205} SHARED_FUNC;
206
207#define ELEMENT(function) { #function , (void (**)(void)) & g_pfn_ ## function }
208static SHARED_FUNC SharedFuncs[] =
209{
210 ELEMENT(pa_stream_connect_playback),
211 ELEMENT(pa_stream_connect_record),
212 ELEMENT(pa_stream_disconnect),
213 ELEMENT(pa_stream_get_sample_spec),
214 ELEMENT(pa_stream_set_latency_update_callback),
215 ELEMENT(pa_stream_write),
216 ELEMENT(pa_stream_unref),
217 ELEMENT(pa_stream_get_state),
218 ELEMENT(pa_stream_set_state_callback),
219 ELEMENT(pa_stream_flush),
220 ELEMENT(pa_stream_drain),
221 ELEMENT(pa_stream_trigger),
222 ELEMENT(pa_stream_new),
223 ELEMENT(pa_stream_get_buffer_attr),
224 ELEMENT(pa_stream_peek),
225 ELEMENT(pa_stream_cork),
226 ELEMENT(pa_stream_drop),
227 ELEMENT(pa_stream_writable_size),
228 ELEMENT(pa_context_connect),
229 ELEMENT(pa_context_disconnect),
230 ELEMENT(pa_context_get_server_info),
231 ELEMENT(pa_context_get_sink_info_by_name),
232 ELEMENT(pa_context_get_source_info_by_name),
233 ELEMENT(pa_context_get_state),
234 ELEMENT(pa_context_unref),
235 ELEMENT(pa_context_errno),
236 ELEMENT(pa_context_new),
237 ELEMENT(pa_context_set_state_callback),
238 ELEMENT(pa_threaded_mainloop_stop),
239 ELEMENT(pa_threaded_mainloop_get_api),
240 ELEMENT(pa_threaded_mainloop_free),
241 ELEMENT(pa_threaded_mainloop_signal),
242 ELEMENT(pa_threaded_mainloop_unlock),
243 ELEMENT(pa_threaded_mainloop_new),
244 ELEMENT(pa_threaded_mainloop_wait),
245 ELEMENT(pa_threaded_mainloop_start),
246 ELEMENT(pa_threaded_mainloop_lock),
247 ELEMENT(pa_bytes_per_second),
248 ELEMENT(pa_frame_size),
249 ELEMENT(pa_sample_format_to_string),
250 ELEMENT(pa_sample_spec_valid),
251 ELEMENT(pa_channel_map_init_auto),
252 ELEMENT(pa_operation_unref),
253 ELEMENT(pa_operation_get_state),
254 ELEMENT(pa_operation_cancel),
255 ELEMENT(pa_strerror),
256 ELEMENT(pa_stream_readable_size)
257};
258#undef ELEMENT
259
260/**
261 * Try to dynamically load the PulseAudio libraries. This function is not
262 * thread-safe, and should be called before attempting to use any of the
263 * PulseAudio functions.
264 *
265 * @returns iprt status code
266 */
267int audioLoadPulseLib(void)
268{
269 int rc = VINF_SUCCESS;
270 unsigned i;
271 static enum { NO = 0, YES, FAIL } isLibLoaded = NO;
272 RTLDRMOD hLib;
273
274 LogFlowFunc(("\n"));
275 /* If this is not NO then the function has obviously been called twice,
276 which is likely to be a bug. */
277 if (NO != isLibLoaded)
278 {
279 AssertMsgFailed(("isLibLoaded == %s\n", YES == isLibLoaded ? "YES" : "NO"));
280 return YES == isLibLoaded ? VINF_SUCCESS : VERR_NOT_SUPPORTED;
281 }
282 isLibLoaded = FAIL;
283 rc = RTLdrLoad(VBOX_PULSE_LIB, &hLib);
284 if (RT_FAILURE(rc))
285 {
286 LogRelFunc(("Failed to load library %s\n", VBOX_PULSE_LIB));
287 return rc;
288 }
289 for (i=0; i<RT_ELEMENTS(SharedFuncs); i++)
290 {
291 rc = RTLdrGetSymbol(hLib, SharedFuncs[i].name, (void**)SharedFuncs[i].fn);
292 if (RT_FAILURE(rc))
293 return rc;
294 }
295 isLibLoaded = YES;
296 return rc;
297}
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