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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 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 "scumm/smush/channel.h"
#include "scumm/smush/chunk.h"
#include "scumm/smush/chunk_type.h"
namespace Scumm {
void SaudChannel::handleStrk(Chunk &b) {
int32 size = b.getSize();
if (size != 14 && size != 10) {
error("STRK has an invalid size : %d", size);
}
}
void SaudChannel::handleSmrk(Chunk &b) {
_markReached = true;
}
void SaudChannel::handleShdr(Chunk &b) {
int32 size = b.getSize();
if (size != 4)
error("SHDR has an invalid size : %d", size);
}
bool SaudChannel::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 TYPE_STRK:
_inData = false;
if (available_size >= (size + 8)) {
MemoryChunk c((byte *)_tbuffer + offset);
handleStrk(c);
} else
return false;
break;
case TYPE_SMRK:
_inData = false;
if (available_size >= (size + 8)) {
MemoryChunk c((byte *)_tbuffer + offset);
handleSmrk(c);
} else
return false;
break;
case TYPE_SHDR:
_inData = false;
if (available_size >= (size + 8)) {
MemoryChunk c((byte *)_tbuffer + offset);
handleShdr(c);
} else
return false;
break;
case TYPE_SDAT:
_inData = true;
_dataSize = size;
offset += 8;
return false;
default:
error("unknown Chunk in SAUD track : %s ", Chunk::ChunkString(type));
}
offset += size + 8;
return true;
}
return false;
}
bool SaudChannel::processBuffer() {
assert(_tbuffer != 0);
assert(_tbufferSize != 0);
assert(_sbuffer == 0);
assert(_sbufferSize == 0);
if (_keepSize) {
_sbufferSize = _tbufferSize;
_sbuffer = _tbuffer;
_tbufferSize = 0;
_tbuffer = 0;
} else if (_inData) {
if (_dataSize < _tbufferSize) {
int32 offset = _dataSize;
while (handleSubTags(offset)) ;
_sbufferSize = _dataSize;
_sbuffer = _tbuffer;
if (offset < _tbufferSize) {
int new_size = _tbufferSize - offset;
_tbuffer = new byte[new_size];
if (!_tbuffer)
error("SaudChannel failed to allocate memory");
memcpy(_tbuffer, _sbuffer + offset, new_size);
_tbufferSize = new_size;
} else {
_tbuffer = 0;
_tbufferSize = 0;
}
if (_sbufferSize == 0) {
delete []_sbuffer;
_sbuffer = 0;
}
} else {
_sbufferSize = _tbufferSize;
_sbuffer = _tbuffer;
_tbufferSize = 0;
_tbuffer = 0;
}
} else {
int32 offset = 0;
while (handleSubTags(offset));
if (_inData) {
_sbufferSize = _tbufferSize - offset;
assert(_sbufferSize);
_sbuffer = new byte[_sbufferSize];
if (!_sbuffer)
error("saud_channel failed to allocate memory");
memcpy(_sbuffer, _tbuffer + offset, _sbufferSize);
delete []_tbuffer;
_tbuffer = 0;
_tbufferSize = 0;
} else {
if (offset) {
byte *old = _tbuffer;
int32 new_size = _tbufferSize - offset;
_tbuffer = new byte[new_size];
if (!_tbuffer)
error("SaudChannel failed to allocate memory");
memcpy(_tbuffer, old + offset, new_size);
_tbufferSize = new_size;
delete []old;
}
}
}
return true;
}
SaudChannel::SaudChannel(int32 track, int32 freq) :
_track(track),
_nbframes(0),
_dataSize(-1),
_frequency(freq),
_inData(false),
_markReached(false),
_index(0),
_tbuffer(0),
_tbufferSize(0),
_sbuffer(0),
_sbufferSize(0),
_keepSize(false) {
}
SaudChannel::~SaudChannel() {
_dataSize = 0;
_tbufferSize = 0;
_sbufferSize = 0;
_markReached = true;
if (_tbuffer)
delete []_tbuffer;
if (_sbuffer) {
// _sbuffer can be not empty here with insane when it seeks in video
delete []_sbuffer;
}
_sbuffer = 0;
}
bool SaudChannel::isTerminated() const {
return (_markReached && _dataSize == 0 && _sbuffer == 0);
}
bool SaudChannel::setParameters(int32 nb, int32 flags, int32 volume, int32 pan, int32 index) {
_nbframes = nb;
_flags = flags; // bit 7 == IS_VOICE, bit 6 == IS_BACKGROUND_MUSIC, other ??
_volume = volume;
_pan = pan;
_index = index;
if (index != 0) {
_dataSize = -2;
_keepSize = true;
_inData = true;
}
return true;
}
bool SaudChannel::checkParameters(int32 index, int32 nb, int32 flags, int32 volume, int32 pan) {
if (++_index != index)
error("invalid index in SaudChannel::checkParameters()");
if (_nbframes != nb)
error("invalid duration in SaudChannel::checkParameters()");
if (_flags != flags)
error("invalid flags in SaudChannel::checkParameters()");
if (_volume != volume || _pan != pan) {
_volume = volume;
_pan = pan;
}
return true;
}
bool SaudChannel::appendData(Chunk &b, int32 size) {
if (_dataSize == -1) {
assert(size > 8);
Chunk::type saud_type = b.getDword();
saud_type = SWAP_BYTES_32(saud_type);
uint32 saud_size = b.getDword();
saud_size = SWAP_BYTES_32(saud_size);
if (saud_type != TYPE_SAUD)
error("Invalid Chunk for SaudChannel : %X", saud_type);
size -= 8;
_dataSize = -2;
}
if (_tbuffer) {
byte *old = _tbuffer;
_tbuffer = new byte[_tbufferSize + size];
if (!_tbuffer)
error("saud_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("saud_channel failed to allocate memory");
b.read(_tbuffer, _tbufferSize);
}
return processBuffer();
}
int32 SaudChannel::availableSoundData(void) const {
return _sbufferSize;
}
void SaudChannel::getSoundData(int16 *snd, int32 size) {
for (int32 i = 0; i < size; i++) {
snd[2 * i] = TO_LE_16(_sbuffer[i] ^ 0x80);
snd[2 * i + 1] = TO_LE_16(_sbuffer[i] ^ 0x80);
}
if (!_keepSize)
_dataSize -= size;
delete []_sbuffer;
_sbuffer = 0;
_sbufferSize = 0;
}
} // End of namespace Scumm
|
