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
168
169
170
171
172
173
174
175
176
177
178
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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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/endian.h"
#include "scumm/scumm.h" // For DEBUG_SMUSH
#include "scumm/util.h"
#include "scumm/smush/channel.h"
#include "scumm/smush/chunk.h"
namespace Scumm {
ImuseChannel::ImuseChannel(int32 track) : SmushChannel(track) {
}
bool ImuseChannel::isTerminated() const {
return (_dataSize <= 0 && _sbuffer == 0);
}
bool ImuseChannel::setParameters(int32 nb, int32 size, int32 flags, int32 unk1, int32) {
if ((flags == 1) || (flags == 2) || (flags == 3)) {
_volume = 127;
} else if ((flags >= 100) && (flags <= 163)) {
_volume = flags * 2 - 200;
} else if ((flags >= 200) && (flags <= 263)) {
_volume = flags * 2 - 400;
} else if ((flags >= 300) && (flags <= 363)) {
_volume = flags * 2 - 600;
} else {
error("ImuseChannel::setParameters(): bad flags: %d", flags);
}
_pan = 0;
return true;
}
bool ImuseChannel::checkParameters(int32 index, int32 nbframes, int32 size, int32 track_flags, int32 unk1) {
return true;
}
bool ImuseChannel::appendData(Chunk &b, int32 size) {
if (_dataSize == -1) {
assert(size > 8);
Chunk::type imus_type = b.readUint32BE();
/*uint32 imus_size =*/ b.readUint32BE();
if (imus_type != MKID_BE('iMUS'))
error("Invalid Chunk for imuse_channel");
size -= 8;
_tbufferSize = size;
assert(_tbufferSize);
_tbuffer = new byte[_tbufferSize];
if (!_tbuffer)
error("imuse_channel failed to allocate memory");
b.read(_tbuffer, size);
_dataSize = -2;
} else {
if (_tbuffer) {
byte *old = _tbuffer;
int32 new_size = size + _tbufferSize;
_tbuffer = new byte[new_size];
if (!_tbuffer)
error("imuse_channel failed to allocate memory");
memcpy(_tbuffer, old, _tbufferSize);
delete[] old;
b.read(_tbuffer + _tbufferSize, size);
_tbufferSize += size;
} else {
_tbufferSize = size;
_tbuffer = new byte[_tbufferSize];
if (!_tbuffer)
error("imuse_channel failed to allocate memory");
b.read(_tbuffer, size);
}
}
processBuffer();
_srbufferSize = _sbufferSize;
if (_sbuffer && _bitsize == 12)
decode();
return true;
}
bool ImuseChannel::handleMap(Chunk &map) {
while (!map.eos()) {
Chunk *sub = map.subBlock();
switch (sub->getType()) {
case MKID_BE('FRMT'):
if (sub->size() != 20)
error("invalid size for FRMT Chunk");
/*uint32 imuse_start =*/ sub->readUint32BE();
sub->skip(4);
_bitsize = sub->readUint32BE();
_rate = sub->readUint32BE();
_channels = sub->readUint32BE();
assert(_channels == 1 || _channels == 2);
break;
case MKID_BE('TEXT'):
// Ignore this
break;
case MKID_BE('REGN'):
if (sub->size() != 8)
error("invalid size for REGN Chunk");
break;
case MKID_BE('STOP'):
if (sub->size() != 4)
error("invalid size for STOP Chunk");
break;
default:
error("Unknown iMUS subChunk found : %s, %d", tag2str(sub->getType()), sub->size());
}
delete sub;
}
return true;
}
void ImuseChannel::decode() {
int remaining_size = _sbufferSize % 3;
if (remaining_size) {
_srbufferSize -= remaining_size;
assert(_inData);
if (_tbuffer == 0) {
_tbuffer = new byte[remaining_size];
memcpy(_tbuffer, _sbuffer + _sbufferSize - remaining_size, remaining_size);
_tbufferSize = remaining_size;
_sbufferSize -= remaining_size;
} else {
debugC(DEBUG_SMUSH, "impossible ! : %p, %d, %d, %p(%d), %p(%d, %d)",
this, _dataSize, _inData, _tbuffer, _tbufferSize, _sbuffer, _sbufferSize, _srbufferSize);
byte *old = _tbuffer;
int new_size = remaining_size + _tbufferSize;
_tbuffer = new byte[new_size];
if (!_tbuffer) error("imuse_channel failed to allocate memory");
memcpy(_tbuffer, old, _tbufferSize);
delete[] old;
memcpy(_tbuffer + _tbufferSize, _sbuffer + _sbufferSize - remaining_size, remaining_size);
_tbufferSize += remaining_size;
}
}
// FIXME: Code duplication! See decode12BitsSample() in imuse_digi/dimuse_codecs.cpp
int loop_size = _sbufferSize / 3;
int new_size = loop_size * 4;
byte *keep, *decoded;
uint32 value;
keep = decoded = new byte[new_size];
assert(keep);
unsigned char * source = _sbuffer;
while (loop_size--) {
byte v1 = *source++;
byte v2 = *source++;
byte v3 = *source++;
value = ((((v2 & 0x0f) << 8) | v1) << 4) - 0x8000;
WRITE_BE_UINT16(decoded, value); decoded += 2;
value = ((((v2 & 0xf0) << 4) | v3) << 4) - 0x8000;
WRITE_BE_UINT16(decoded, value); decoded += 2;
}
delete[] _sbuffer;
_sbuffer = (byte *)keep;
_sbufferSize = new_size;
}
bool ImuseChannel::handleSubTags(int32 &offset) {
if (_tbufferSize - offset >= 8) {
Chunk::type type = READ_BE_UINT32(_tbuffer + offset);
uint32 size = READ_BE_UINT32(_tbuffer + offset + 4);
uint32 available_size = _tbufferSize - offset;
switch (type) {
case MKID_BE('MAP '):
_inData = false;
if (available_size >= (size + 8)) {
MemoryChunk c((byte *)_tbuffer + offset);
handleMap(c);
}
break;
case MKID_BE('DATA'):
_inData = true;
_dataSize = size;
offset += 8;
{
int reqsize = 1;
if (_channels == 2)
reqsize *= 2;
if (_bitsize == 16)
reqsize *= 2;
else if (_bitsize == 12) {
if (reqsize > 1)
reqsize = reqsize * 3 / 2;
else reqsize = 3;
}
if ((size % reqsize) != 0) {
debugC(DEBUG_SMUSH, "Invalid iMUS sound data size : (%d %% %d) != 0, correcting...", size, reqsize);
size += 3 - (size % reqsize);
}
}
return false;
default:
error("unknown Chunk in iMUS track : %s ", tag2str(type));
}
offset += size + 8;
return true;
}
return false;
}
byte *ImuseChannel::getSoundData() {
byte *tmp = _sbuffer;
assert(_dataSize > 0);
_dataSize -= _srbufferSize;
_sbuffer = 0;
_sbufferSize = 0;
return tmp;
}
} // End of namespace Scumm
|
