1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22
23 #if SDL_AUDIO_DRIVER_HAIKU
24
25 /* Allow access to the audio stream on Haiku */
26
27 #include <SoundPlayer.h>
28 #include <signal.h>
29
30 #include "../../main/haiku/SDL_BeApp.h"
31
32 extern "C"
33 {
34
35 #include "SDL_audio.h"
36 #include "../SDL_audio_c.h"
37 #include "../SDL_sysaudio.h"
38 #include "SDL_haikuaudio.h"
39 #include "SDL_assert.h"
40
41 }
42
43
44 /* !!! FIXME: have the callback call the higher level to avoid code dupe. */
45 /* The Haiku callback for handling the audio buffer */
46 static void
FillSound(void * device,void * stream,size_t len,const media_raw_audio_format & format)47 FillSound(void *device, void *stream, size_t len,
48 const media_raw_audio_format & format)
49 {
50 SDL_AudioDevice *audio = (SDL_AudioDevice *) device;
51 SDL_AudioCallback callback = audio->callbackspec.callback;
52
53 /* Only do something if audio is enabled */
54 if (!SDL_AtomicGet(&audio->enabled) || SDL_AtomicGet(&audio->paused)) {
55 if (audio->stream) {
56 SDL_AudioStreamClear(audio->stream);
57 }
58 SDL_memset(stream, audio->spec.silence, len);
59 return;
60 }
61
62 SDL_assert(audio->spec.size == len);
63
64 if (audio->stream == NULL) { /* no conversion necessary. */
65 SDL_LockMutex(audio->mixer_lock);
66 callback(audio->callbackspec.userdata, (Uint8 *) stream, len);
67 SDL_UnlockMutex(audio->mixer_lock);
68 } else { /* streaming/converting */
69 const int stream_len = audio->callbackspec.size;
70 const int ilen = (int) len;
71 while (SDL_AudioStreamAvailable(audio->stream) < ilen) {
72 callback(audio->callbackspec.userdata, audio->work_buffer, stream_len);
73 if (SDL_AudioStreamPut(audio->stream, audio->work_buffer, stream_len) == -1) {
74 SDL_AudioStreamClear(audio->stream);
75 SDL_AtomicSet(&audio->enabled, 0);
76 break;
77 }
78 }
79
80 const int got = SDL_AudioStreamGet(audio->stream, stream, ilen);
81 SDL_assert((got < 0) || (got == ilen));
82 if (got != ilen) {
83 SDL_memset(stream, audio->spec.silence, len);
84 }
85 }
86 }
87
88 static void
HAIKUAUDIO_CloseDevice(_THIS)89 HAIKUAUDIO_CloseDevice(_THIS)
90 {
91 if (_this->hidden->audio_obj) {
92 _this->hidden->audio_obj->Stop();
93 delete _this->hidden->audio_obj;
94 }
95 delete _this->hidden;
96 }
97
98
99 static const int sig_list[] = {
100 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGWINCH, 0
101 };
102
103 static inline void
MaskSignals(sigset_t * omask)104 MaskSignals(sigset_t * omask)
105 {
106 sigset_t mask;
107 int i;
108
109 sigemptyset(&mask);
110 for (i = 0; sig_list[i]; ++i) {
111 sigaddset(&mask, sig_list[i]);
112 }
113 sigprocmask(SIG_BLOCK, &mask, omask);
114 }
115
116 static inline void
UnmaskSignals(sigset_t * omask)117 UnmaskSignals(sigset_t * omask)
118 {
119 sigprocmask(SIG_SETMASK, omask, NULL);
120 }
121
122
123 static int
HAIKUAUDIO_OpenDevice(_THIS,void * handle,const char * devname,int iscapture)124 HAIKUAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
125 {
126 int valid_datatype = 0;
127 media_raw_audio_format format;
128 SDL_AudioFormat test_format = SDL_FirstAudioFormat(_this->spec.format);
129
130 /* Initialize all variables that we clean on shutdown */
131 _this->hidden = new SDL_PrivateAudioData;
132 if (_this->hidden == NULL) {
133 return SDL_OutOfMemory();
134 }
135 SDL_zerop(_this->hidden);
136
137 /* Parse the audio format and fill the Be raw audio format */
138 SDL_zero(format);
139 format.byte_order = B_MEDIA_LITTLE_ENDIAN;
140 format.frame_rate = (float) _this->spec.freq;
141 format.channel_count = _this->spec.channels; /* !!! FIXME: support > 2? */
142 while ((!valid_datatype) && (test_format)) {
143 valid_datatype = 1;
144 _this->spec.format = test_format;
145 switch (test_format) {
146 case AUDIO_S8:
147 format.format = media_raw_audio_format::B_AUDIO_CHAR;
148 break;
149
150 case AUDIO_U8:
151 format.format = media_raw_audio_format::B_AUDIO_UCHAR;
152 break;
153
154 case AUDIO_S16LSB:
155 format.format = media_raw_audio_format::B_AUDIO_SHORT;
156 break;
157
158 case AUDIO_S16MSB:
159 format.format = media_raw_audio_format::B_AUDIO_SHORT;
160 format.byte_order = B_MEDIA_BIG_ENDIAN;
161 break;
162
163 case AUDIO_S32LSB:
164 format.format = media_raw_audio_format::B_AUDIO_INT;
165 break;
166
167 case AUDIO_S32MSB:
168 format.format = media_raw_audio_format::B_AUDIO_INT;
169 format.byte_order = B_MEDIA_BIG_ENDIAN;
170 break;
171
172 case AUDIO_F32LSB:
173 format.format = media_raw_audio_format::B_AUDIO_FLOAT;
174 break;
175
176 case AUDIO_F32MSB:
177 format.format = media_raw_audio_format::B_AUDIO_FLOAT;
178 format.byte_order = B_MEDIA_BIG_ENDIAN;
179 break;
180
181 default:
182 valid_datatype = 0;
183 test_format = SDL_NextAudioFormat();
184 break;
185 }
186 }
187
188 if (!valid_datatype) { /* shouldn't happen, but just in case... */
189 return SDL_SetError("Unsupported audio format");
190 }
191
192 /* Calculate the final parameters for this audio specification */
193 SDL_CalculateAudioSpec(&_this->spec);
194
195 format.buffer_size = _this->spec.size;
196
197 /* Subscribe to the audio stream (creates a new thread) */
198 sigset_t omask;
199 MaskSignals(&omask);
200 _this->hidden->audio_obj = new BSoundPlayer(&format, "SDL Audio",
201 FillSound, NULL, _this);
202 UnmaskSignals(&omask);
203
204 if (_this->hidden->audio_obj->Start() == B_NO_ERROR) {
205 _this->hidden->audio_obj->SetHasData(true);
206 } else {
207 return SDL_SetError("Unable to start Be audio");
208 }
209
210 /* We're running! */
211 return 0;
212 }
213
214 static void
HAIKUAUDIO_Deinitialize(void)215 HAIKUAUDIO_Deinitialize(void)
216 {
217 SDL_QuitBeApp();
218 }
219
220 static int
HAIKUAUDIO_Init(SDL_AudioDriverImpl * impl)221 HAIKUAUDIO_Init(SDL_AudioDriverImpl * impl)
222 {
223 /* Initialize the Be Application, if it's not already started */
224 if (SDL_InitBeApp() < 0) {
225 return 0;
226 }
227
228 /* Set the function pointers */
229 impl->OpenDevice = HAIKUAUDIO_OpenDevice;
230 impl->CloseDevice = HAIKUAUDIO_CloseDevice;
231 impl->Deinitialize = HAIKUAUDIO_Deinitialize;
232 impl->ProvidesOwnCallbackThread = 1;
233 impl->OnlyHasDefaultOutputDevice = 1;
234
235 return 1; /* this audio target is available. */
236 }
237
238 extern "C"
239 {
240 extern AudioBootStrap HAIKUAUDIO_bootstrap;
241 }
242 AudioBootStrap HAIKUAUDIO_bootstrap = {
243 "haiku", "Haiku BSoundPlayer", HAIKUAUDIO_Init, 0
244 };
245
246 #endif /* SDL_AUDIO_DRIVER_HAIKU */
247
248 /* vi: set ts=4 sw=4 expandtab: */
249