This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_beaudio.cc
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_config.h"
#if SDL_AUDIO_DRIVER_BEOSAUDIO
/* Allow access to the audio stream on BeOS */
#include <SoundPlayer.h>
#include "../../main/beos/SDL_BeApp.h"
extern "C"
{
#include "SDL_audio.h"
#include "../SDL_audio_c.h"
#include "../SDL_sysaudio.h"
#include "../../thread/beos/SDL_systhread_c.h"
#include "SDL_beaudio.h"
}
/* !!! FIXME: have the callback call the higher level to avoid code dupe. */
/* The BeOS callback for handling the audio buffer */
static void
FillSound(void *device, void *stream, size_t len,
const media_raw_audio_format & format)
{
SDL_AudioDevice *audio = (SDL_AudioDevice *) device;
/* Only do soemthing if audio is enabled */
if (!audio->enabled)
return;
if (!audio->paused) {
if (audio->convert.needed) {
57
SDL_LockMutex(audio->mixer_lock);
58
59
60
(*audio->spec.callback) (audio->spec.userdata,
(Uint8 *) audio->convert.buf,
audio->convert.len);
61
SDL_UnlockMutex(audio->mixer_lock);
62
63
64
SDL_ConvertAudio(&audio->convert);
SDL_memcpy(stream, audio->convert.buf, audio->convert.len_cvt);
} else {
65
SDL_LockMutex(audio->mixer_lock);
66
67
(*audio->spec.callback) (audio->spec.userdata,
(Uint8 *) stream, len);
68
SDL_UnlockMutex(audio->mixer_lock);
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
}
}
}
static void
BEOSAUDIO_CloseDevice(_THIS)
{
if (_this->hidden != NULL) {
if (_this->hidden->audio_obj) {
_this->hidden->audio_obj->Stop();
delete _this->hidden->audio_obj;
_this->hidden->audio_obj = NULL;
}
delete _this->hidden;
_this->hidden = NULL;
}
}
static int
BEOSAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
{
int valid_datatype = 0;
media_raw_audio_format format;
SDL_AudioFormat test_format = SDL_FirstAudioFormat(_this->spec.format);
/* Initialize all variables that we clean on shutdown */
_this->hidden = new SDL_PrivateAudioData;
if (_this->hidden == NULL) {
98
return SDL_OutOfMemory();
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
}
SDL_memset(_this->hidden, 0, (sizeof *_this->hidden));
/* Parse the audio format and fill the Be raw audio format */
SDL_memset(&format, '\0', sizeof(media_raw_audio_format));
format.byte_order = B_MEDIA_LITTLE_ENDIAN;
format.frame_rate = (float) _this->spec.freq;
format.channel_count = _this->spec.channels; /* !!! FIXME: support > 2? */
while ((!valid_datatype) && (test_format)) {
valid_datatype = 1;
_this->spec.format = test_format;
switch (test_format) {
case AUDIO_S8:
format.format = media_raw_audio_format::B_AUDIO_CHAR;
break;
case AUDIO_U8:
format.format = media_raw_audio_format::B_AUDIO_UCHAR;
break;
case AUDIO_S16LSB:
format.format = media_raw_audio_format::B_AUDIO_SHORT;
break;
case AUDIO_S16MSB:
format.format = media_raw_audio_format::B_AUDIO_SHORT;
format.byte_order = B_MEDIA_BIG_ENDIAN;
break;
case AUDIO_S32LSB:
format.format = media_raw_audio_format::B_AUDIO_INT;
break;
case AUDIO_S32MSB:
format.format = media_raw_audio_format::B_AUDIO_INT;
format.byte_order = B_MEDIA_BIG_ENDIAN;
break;
case AUDIO_F32LSB:
format.format = media_raw_audio_format::B_AUDIO_FLOAT;
break;
case AUDIO_F32MSB:
format.format = media_raw_audio_format::B_AUDIO_FLOAT;
format.byte_order = B_MEDIA_BIG_ENDIAN;
break;
default:
valid_datatype = 0;
test_format = SDL_NextAudioFormat();
break;
}
}
if (!valid_datatype) { /* shouldn't happen, but just in case... */
BEOSAUDIO_CloseDevice(_this);
155
return SDL_SetError("Unsupported audio format");
156
157
158
159
160
}
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&_this->spec);
161
162
format.buffer_size = _this->spec.size;
163
164
165
166
167
168
169
170
171
172
173
/* Subscribe to the audio stream (creates a new thread) */
sigset_t omask;
SDL_MaskSignals(&omask);
_this->hidden->audio_obj = new BSoundPlayer(&format, "SDL Audio",
FillSound, NULL, _this);
SDL_UnmaskSignals(&omask);
if (_this->hidden->audio_obj->Start() == B_NO_ERROR) {
_this->hidden->audio_obj->SetHasData(true);
} else {
BEOSAUDIO_CloseDevice(_this);
174
return SDL_SetError("Unable to start Be audio");
175
176
177
}
/* We're running! */
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
}
static void
BEOSAUDIO_Deinitialize(void)
{
SDL_QuitBeApp();
}
static int
BEOSAUDIO_Init(SDL_AudioDriverImpl * impl)
{
/* Initialize the Be Application, if it's not already started */
if (SDL_InitBeApp() < 0) {
return 0;
}
/* Set the function pointers */
impl->OpenDevice = BEOSAUDIO_OpenDevice;
impl->CloseDevice = BEOSAUDIO_CloseDevice;
impl->Deinitialize = BEOSAUDIO_Deinitialize;
impl->ProvidesOwnCallbackThread = 1;
impl->OnlyHasDefaultOutputDevice = 1;
return 1; /* this audio target is available. */
}
extern "C"
{
extern AudioBootStrap BEOSAUDIO_bootstrap;
}
AudioBootStrap BEOSAUDIO_bootstrap = {
"baudio", "BeOS BSoundPlayer", BEOSAUDIO_Init, 0
};
#endif /* SDL_AUDIO_DRIVER_BEOSAUDIO */
/* vi: set ts=4 sw=4 expandtab: */