1
2
3
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
57
58
59
60
61
62
63
64
65
66
67
68
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
98
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
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2006 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "sound/audiocd.h"
#include "sound/mp3.h"
#include "sound/vorbis.h"
#include "sound/flac.h"
#include "base/engine.h"
#include "common/file.h"
#include "common/util.h"
#include "common/system.h"
struct TrackFormat {
/** Decodername */
const char* decoderName;
/**
* Pointer to a function which tries to open the specified track - the only argument
* is the number of the track to be played.
* Returns either the DigitalTrackInfo object representing the requested track or null
* in case of an error
*/
DigitalTrackInfo* (*openTrackFunction)(int);
};
static const TrackFormat TRACK_FORMATS[] = {
/* decoderName, openTrackFunction */
#ifdef USE_FLAC
{ "Flac", getFlacTrack },
#endif
#ifdef USE_VORBIS
{ "Ogg Vorbis", getVorbisTrack },
#endif
#ifdef USE_MAD
{ "MPEG Layer 3", getMP3Track },
#endif
{ NULL, NULL } // Terminator
};
DECLARE_SINGLETON(AudioCDManager);
AudioCDManager::AudioCDManager() {
memset(&_cd, 0, sizeof(_cd));
memset(_cachedTracks, 0, sizeof(_cachedTracks));
memset(_trackInfo, 0, sizeof(_trackInfo));
_currentCache = 0;
}
void AudioCDManager::play(int track, int numLoops, int startFrame, int duration) {
if (numLoops != 0 || startFrame != 0) {
// Try to load the track from a .mp3/.ogg file, and if found, use
// that. If not found, attempt to do regular Audio CD playback of
// the requested track.
int index = getCachedTrack(track);
_cd.track = track;
_cd.numLoops = numLoops;
_cd.start = startFrame;
_cd.duration = duration;
if (index >= 0) {
g_engine->_mixer->stopHandle(_cd.handle);
_cd.playing = true;
_trackInfo[index]->play(g_engine->_mixer, &_cd.handle, _cd.start, _cd.duration);
} else {
g_system->playCD(track, numLoops, startFrame, duration);
_cd.playing = false;
}
}
}
void AudioCDManager::stop() {
if (_cd.playing) {
g_engine->_mixer->stopHandle(_cd.handle);
_cd.playing = false;
} else {
g_system->stopCD();
}
}
bool AudioCDManager::isPlaying() const {
return _cd.playing || g_system->pollCD();
}
void AudioCDManager::updateCD() {
if (_cd.playing) {
// If the sound handle is 0, then playback stopped.
if (!g_engine->_mixer->isSoundHandleActive(_cd.handle)) {
// If playback just stopped, check if the current track is supposed
// to be repeated, and if that's the case, play it again. Else, stop
// the CD explicitly.
if (_cd.numLoops == -1 || --_cd.numLoops > 0) {
int index = getCachedTrack(_cd.track);
assert(index >= 0);
_trackInfo[index]->play(g_engine->_mixer, &_cd.handle, _cd.start, _cd.duration);
} else {
g_engine->_mixer->stopHandle(_cd.handle);
_cd.playing = false;
}
}
} else {
g_system->updateCD();
}
}
AudioCDManager::Status AudioCDManager::getStatus() const {
// TODO: This could be improved for "real" CD playback.
// But to do that, we would have to extend the OSystem interface.
Status info = _cd;
info.playing = isPlaying();
return info;
}
int AudioCDManager::getCachedTrack(int track) {
int i;
// See if we find the track in the cache
for (i = 0; i < CACHE_TRACKS; i++)
if (_cachedTracks[i] == track) {
if (_trackInfo[i])
return i;
else
return -1;
}
int currentIndex = _currentCache++;
_currentCache %= CACHE_TRACKS;
// Not found, see if it exists
// First, delete the previous track info object
delete _trackInfo[currentIndex];
_trackInfo[currentIndex] = NULL;
_cachedTracks[currentIndex] = 0;
for (i = 0; i < ARRAYSIZE(TRACK_FORMATS)-1 && _trackInfo[currentIndex] == NULL; ++i)
_trackInfo[currentIndex] = TRACK_FORMATS[i].openTrackFunction(track);
if (_trackInfo[currentIndex] != NULL) {
_cachedTracks[currentIndex] = track;
return currentIndex;
}
debug(2, "Track %d not available in compressed format", track);
return -1;
}
|
