e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 the audio stream on BeOS */ |
25 | |
26 | #include <SoundPlayer.h> |
27 | |
28 | #include "../../main/beos/SDL_BeApp.h" |
29 | |
30 | extern "C" { |
31 | |
32 | #include "SDL_audio.h" |
33 | #include "../SDL_audio_c.h" |
34 | #include "../SDL_sysaudio.h" |
35 | #include "../../thread/beos/SDL_systhread_c.h" |
36 | #include "SDL_beaudio.h" |
37 | |
38 | |
39 | /* Audio driver functions */ |
40 | static int BE_OpenAudio(_THIS, SDL_AudioSpec *spec); |
41 | static void BE_WaitAudio(_THIS); |
42 | static void BE_PlayAudio(_THIS); |
43 | static Uint8 *BE_GetAudioBuf(_THIS); |
44 | static void BE_CloseAudio(_THIS); |
45 | |
46 | /* Audio driver bootstrap functions */ |
47 | |
48 | static int Audio_Available(void) |
49 | { |
50 | return(1); |
51 | } |
52 | |
53 | static void Audio_DeleteDevice(SDL_AudioDevice *device) |
54 | { |
55 | SDL_free(device->hidden); |
56 | SDL_free(device); |
57 | } |
58 | |
59 | static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
60 | { |
61 | SDL_AudioDevice *device; |
62 | |
63 | /* Initialize all variables that we clean on shutdown */ |
64 | device = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
65 | if ( device ) { |
66 | SDL_memset(device, 0, (sizeof *device)); |
67 | device->hidden = (struct SDL_PrivateAudioData *) |
68 | SDL_malloc((sizeof *device->hidden)); |
69 | } |
70 | if ( (device == NULL) || (device->hidden == NULL) ) { |
71 | SDL_OutOfMemory(); |
72 | if ( device ) { |
73 | SDL_free(device); |
74 | } |
75 | return(0); |
76 | } |
77 | SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
78 | |
79 | /* Set the function pointers */ |
80 | device->OpenAudio = BE_OpenAudio; |
81 | device->WaitAudio = BE_WaitAudio; |
82 | device->PlayAudio = BE_PlayAudio; |
83 | device->GetAudioBuf = BE_GetAudioBuf; |
84 | device->CloseAudio = BE_CloseAudio; |
85 | |
86 | device->free = Audio_DeleteDevice; |
87 | |
88 | return device; |
89 | } |
90 | |
91 | AudioBootStrap BAUDIO_bootstrap = { |
92 | "baudio", "BeOS BSoundPlayer", |
93 | Audio_Available, Audio_CreateDevice |
94 | }; |
95 | |
96 | /* The BeOS callback for handling the audio buffer */ |
97 | static void FillSound(void *device, void *stream, size_t len, |
98 | const media_raw_audio_format &format) |
99 | { |
100 | SDL_AudioDevice *audio = (SDL_AudioDevice *)device; |
101 | |
102 | /* Silence the buffer, since it's ours */ |
103 | SDL_memset(stream, audio->spec.silence, len); |
104 | |
105 | /* Only do soemthing if audio is enabled */ |
106 | if ( ! audio->enabled ) |
107 | return; |
108 | |
109 | if ( ! audio->paused ) { |
110 | if ( audio->convert.needed ) { |
111 | SDL_mutexP(audio->mixer_lock); |
112 | (*audio->spec.callback)(audio->spec.userdata, |
113 | (Uint8 *)audio->convert.buf,audio->convert.len); |
114 | SDL_mutexV(audio->mixer_lock); |
115 | SDL_ConvertAudio(&audio->convert); |
116 | SDL_memcpy(stream,audio->convert.buf,audio->convert.len_cvt); |
117 | } else { |
118 | SDL_mutexP(audio->mixer_lock); |
119 | (*audio->spec.callback)(audio->spec.userdata, |
120 | (Uint8 *)stream, len); |
121 | SDL_mutexV(audio->mixer_lock); |
122 | } |
123 | } |
124 | return; |
125 | } |
126 | |
127 | /* Dummy functions -- we don't use thread-based audio */ |
128 | void BE_WaitAudio(_THIS) |
129 | { |
130 | return; |
131 | } |
132 | void BE_PlayAudio(_THIS) |
133 | { |
134 | return; |
135 | } |
136 | Uint8 *BE_GetAudioBuf(_THIS) |
137 | { |
138 | return(NULL); |
139 | } |
140 | |
141 | void BE_CloseAudio(_THIS) |
142 | { |
143 | if ( audio_obj ) { |
144 | audio_obj->Stop(); |
145 | delete audio_obj; |
146 | audio_obj = NULL; |
147 | } |
148 | |
149 | /* Quit the Be Application, if there's nothing left to do */ |
150 | SDL_QuitBeApp(); |
151 | } |
152 | |
153 | int BE_OpenAudio(_THIS, SDL_AudioSpec *spec) |
154 | { |
155 | int valid_datatype = 0; |
156 | media_raw_audio_format format; |
157 | Uint16 test_format = SDL_FirstAudioFormat(spec->format); |
158 | |
159 | /* Parse the audio format and fill the Be raw audio format */ |
160 | memset(&format, '\0', sizeof (media_raw_audio_format)); |
161 | format.byte_order = B_MEDIA_LITTLE_ENDIAN; |
162 | format.frame_rate = (float) spec->freq; |
163 | format.channel_count = spec->channels; /* !!! FIXME: support > 2? */ |
164 | while ((!valid_datatype) && (test_format)) { |
165 | valid_datatype = 1; |
166 | spec->format = test_format; |
167 | switch (test_format) { |
168 | case AUDIO_S8: |
169 | format.format = media_raw_audio_format::B_AUDIO_CHAR; |
170 | break; |
171 | |
172 | case AUDIO_U8: |
173 | format.format = media_raw_audio_format::B_AUDIO_UCHAR; |
174 | break; |
175 | |
176 | case AUDIO_S16LSB: |
177 | format.format = media_raw_audio_format::B_AUDIO_SHORT; |
178 | break; |
179 | |
180 | case AUDIO_S16MSB: |
181 | format.format = media_raw_audio_format::B_AUDIO_SHORT; |
182 | format.byte_order = B_MEDIA_BIG_ENDIAN; |
183 | break; |
184 | |
185 | default: |
186 | valid_datatype = 0; |
187 | test_format = SDL_NextAudioFormat(); |
188 | break; |
189 | } |
190 | } |
191 | |
192 | if (!valid_datatype) { /* shouldn't happen, but just in case... */ |
193 | SDL_SetError("Unsupported audio format"); |
194 | return (-1); |
195 | } |
196 | |
197 | /* Initialize the Be Application, if it's not already started */ |
198 | if (SDL_InitBeApp() < 0) { |
199 | return (-1); |
200 | } |
201 | |
202 | format.buffer_size = spec->samples; |
203 | |
204 | /* Calculate the final parameters for this audio specification */ |
205 | SDL_CalculateAudioSpec(spec); |
206 | |
207 | /* Subscribe to the audio stream (creates a new thread) */ |
208 | { sigset_t omask; |
209 | SDL_MaskSignals(&omask); |
210 | audio_obj = new BSoundPlayer(&format, "SDL Audio", FillSound, |
211 | NULL, _this); |
212 | SDL_UnmaskSignals(&omask); |
213 | } |
214 | if ( audio_obj->Start() == B_NO_ERROR ) { |
215 | audio_obj->SetHasData(true); |
216 | } else { |
217 | SDL_SetError("Unable to start Be audio"); |
218 | return(-1); |
219 | } |
220 | |
221 | /* We're running! */ |
222 | return(1); |
223 | } |
224 | |
225 | }; /* Extern C */ |