1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 // Allow use of stuff in <nds.h>
24 #define FORBIDDEN_SYMBOL_EXCEPTION_printf
25 #define FORBIDDEN_SYMBOL_EXCEPTION_unistd_h
26
27 #include "common/scummsys.h"
28
29 #if defined(__DS__)
30
31 #include "backends/mixer/maxmod/maxmod-mixer.h"
32 #include "common/system.h"
33
34 #include <nds.h>
35 #include <maxmod9.h>
36
MaxModMixerManager(int freq,int bufSize)37 MaxModMixerManager::MaxModMixerManager(int freq, int bufSize)
38 :
39 _freq(freq),
40 _bufSize(bufSize) {
41
42 }
43
~MaxModMixerManager()44 MaxModMixerManager::~MaxModMixerManager() {
45 // HACK: This is called during the OSystem destructor, but Audio::MixerImpl calls
46 // mutex functions from OSystem during its destructor, which causes a crash.
47 // _mixer->setReady(false);
48 _mixer = 0;
49 mmStreamClose();
50 }
51
on_stream_request(mm_word length,mm_addr dest,mm_stream_formats format)52 mm_word on_stream_request( mm_word length, mm_addr dest, mm_stream_formats format ) {
53 Audio::MixerImpl *mixer = (Audio::MixerImpl *)g_system->getMixer();
54 assert(mixer);
55 mixer->mixCallback((byte *)dest, length * 4);
56 return length;
57 }
58
init()59 void MaxModMixerManager::init() {
60 _mixer = new Audio::MixerImpl(_freq);
61 assert(_mixer);
62
63 mm_ds_system sys;
64 sys.mod_count = 0;
65 sys.samp_count = 0;
66 sys.mem_bank = 0;
67 sys.fifo_channel = FIFO_MAXMOD;
68 mmInit( &sys );
69
70 _stream.sampling_rate = _freq;
71 _stream.buffer_length = _bufSize / 4;
72 _stream.callback = on_stream_request;
73 _stream.format = MM_STREAM_16BIT_STEREO;
74 _stream.timer = MM_TIMER2;
75 _stream.manual = 1;
76
77 mmStreamOpen( &_stream );
78
79 _mixer->setReady(true);
80 }
81
suspendAudio()82 void MaxModMixerManager::suspendAudio() {
83 mmStreamClose();
84 _audioSuspended = true;
85 }
86
resumeAudio()87 int MaxModMixerManager::resumeAudio() {
88 if (!_audioSuspended)
89 return -2;
90
91 mmStreamOpen( &_stream );
92 _audioSuspended = false;
93 return 0;
94 }
95
updateAudio()96 void MaxModMixerManager::updateAudio() {
97 if (!_audioSuspended)
98 mmStreamUpdate();
99 }
100
101 #endif
102