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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef CHANNEL_H
#define CHANNEL_H
#include "config.h"
#include "common/engine.h" // for debug, warning, error
#ifdef DEBUG
# ifndef NO_DEBUG_CHANNEL
# define DEBUG_CHANNEL
# endif
#else
# ifdef DEBUG_CHANNEL
# error DEBUG_CHANNEL defined without DEBUG
# endif
#endif
class Chunk;
class ContChunk;
/*! @brief int32erface for a sound channel (a track)
This is the int32erface for sound channels.
*/
class _Channel {
public:
virtual ~_Channel() {};
// called by the smush_player
virtual bool appendData(Chunk &b, int32 size) = 0;
virtual bool setParameters(int32, int32, int32, int32) = 0;
virtual bool checkParameters(int32, int32, int32, int32, int32) = 0;
// called by the mixer
virtual bool isTerminated() const = 0;
virtual int32 availableSoundData() const = 0;
virtual void getSoundData(int16 *sound_buffer, int32 size) = 0; // size is in sample
virtual void getSoundData(int8 *sound_buffer, int32 size) = 0;
virtual int32 getRate() = 0;
virtual bool getParameters(int32 &rate, bool &stereo, bool &is_16bit) = 0;
virtual int32 getTrackIdentifier() const = 0;
};
class SaudChannel : public _Channel {
private:
int32 _track; //!< The track identifier
int32 _nbframes; //!< number of frames of the track (unused)
int32 _dataSize; //!< the size of the sound buffer
int32 _frequency; //!< the frequency target of the track (always 22050)
bool _inData; //!< are we processing data ?
bool _markReached; //!< set to \c true when the SMRK tag is reached
int32 _flags; //!< current flags of the track (unused)
int32 _volume; //!< the current track volume
int32 _balance; //!< the current track balance
int32 _index; //!< the current PSAD index (for coherency checking)
int16 _voltable[2][256]; //!< the precalculated volume table (stereo 16 bits)
byte *_tbuffer; //!< data temporary buffer
int32 _tbufferSize; //!< temporary buffer size
byte *_sbuffer; //!< sound buffer
int32 _sbufferSize; //!< sound buffer size
protected:
void handleStrk(Chunk &c);
void handleSmrk(Chunk &c);
void handleShdr(Chunk &c);
bool handleSubTags(int32 &offset);
bool processBuffer();
void recalcVolumeTable();
public:
SaudChannel(int32 track, int32 freq);
virtual ~SaudChannel();
bool isTerminated() const;
bool setParameters(int32 duration, int32 flags, int32 vol1, int32 vol2);
bool checkParameters(int32 index, int32 duration, int32 flags, int32 vol1, int32 vol2);
bool appendData(Chunk &b, int32 size);
int32 availableSoundData() const;
void getSoundData(int16 *sound_buffer, int32 size);
void getSoundData(int8 *sound_buffer, int32 size) { error("16bit request for SAUD channel should never happen"); };
int32 getRate() { return _frequency; }
bool getParameters(int32 &rate, bool &stereo, bool &is_16bit) {
rate = _frequency;
stereo = true;
is_16bit = true;
return true;
};
virtual int32 getTrackIdentifier() const { return _track; };
};
/*! @brief class for a IACT sound ::channel (a The Dig track)
This class implements a channel specifically for The Dig.
\bug for unknown reason, some sound have a too long duration, or repeat themselves.
*/
class ImuseChannel : public _Channel {
private:
int32 _track; //!< the track number
byte *_tbuffer; //!< data temporary buffer
int32 _tbufferSize; //!< temporary buffer size
byte *_sbuffer; //!< sound buffer
int32 _sbufferSize; //!< sound buffer size
int32 _srbufferSize;
int32 _frequency; //!< the target frequency of the ::mixer
int32 _dataSize; //!< remaining size of sound data in the iMUS buffer
bool _inData;
int32 _volume;
int32 _bitsize; //!< the bitsize of the original data
int32 _rate; //!< the sampling rate of the original data
int32 _channels; //!< the number of channels of the original data
protected:
int32 decode(int32 size, int32 &ret);
void decode();
bool processBuffer();
bool handleMap(Chunk &);
bool handleFormat(Chunk &);
bool handleText(Chunk &);
bool handleRegion(Chunk &);
bool handleStop(Chunk &);
bool handleSubTags(int32 & offset);
public:
ImuseChannel(int32 track, int32 freq);
virtual ~ImuseChannel();
bool isTerminated() const;
bool setParameters(int32 nbframes, int32 size, int32 track_flags, int32 unk1);
bool checkParameters(int32 index, int32 nbframes, int32 size, int32 track_flags, int32 unk1);
bool appendData(Chunk &b, int32 size);
int32 availableSoundData() const;
void getSoundData(int16 *sound_buffer, int32 size);
void getSoundData(int8 *sound_buffer, int32 size);
int32 getRate() { return _rate; }
bool getParameters(int32 &rate, bool &stereo, bool &is_16bit) {
rate = _frequency;
stereo = (_channels == 2);
is_16bit = (_bitsize > 8);
return true;
};
virtual int32 getTrackIdentifier() const { return _track; };
};
#endif
|
