n_load.c
8.34 KB
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
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
/*====================================================================
*
* Copyright 1993, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
#include "n_synthInternals.h"
#include <os.h>
#include <R4300.h>
#ifndef MIN
# define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifdef AUD_PROFILE
extern u32 cnt_index, adpcm_num, adpcm_cnt, adpcm_max, adpcm_min, lastCnt[];
#endif
#define ADPCMFBYTES 9
#define LFSAMPLES 4
static
Acmd *_decodeChunk(Acmd *ptr, N_PVoice *f, s32 tsam, s32 nbytes, s16 outp, s16 inp, u32 flags);
Acmd *n_alAdpcmPull(N_PVoice *filter, s16 *outp, s32 outCount, Acmd *p)
{
Acmd *ptr = p;
s16 inp;
s32 tsam;
s32 nframes;
s32 nbytes;
s32 overFlow;
s32 startZero;
s32 nOver;
s32 nSam;
s32 op;
s32 nLeft;
s32 bEnd;
s32 decoded = 0;
s32 looped = 0;
N_PVoice *f = filter;
#ifdef AUD_PROFILE
lastCnt[++cnt_index] = osGetCount();
#endif
if (outCount == 0)
return ptr;
#ifndef N_MICRO
inp = AL_DECODER_IN;
#else
inp = N_AL_DECODER_IN;
#endif
aLoadADPCM(ptr++, f->dc_bookSize,
K0_TO_PHYS(f->dc_table->waveInfo.adpcmWave.book->book));
looped = (outCount + f->dc_sample > f->dc_loop.end) && (f->dc_loop.count != 0);
if (looped)
nSam = f->dc_loop.end - f->dc_sample;
else
nSam = outCount;
if (f->dc_lastsam)
nLeft = ADPCMFSIZE - f->dc_lastsam;
else
nLeft = 0;
tsam = nSam - nLeft;
if (tsam<0) tsam = 0;
nframes = (tsam+ADPCMFSIZE-1)>>LFSAMPLES;
nbytes = nframes*ADPCMFBYTES;
if (looped){
ptr = _decodeChunk(ptr, f, tsam, nbytes, *outp, inp, f->dc_first);
/*
* Fix up output pointer, which will be used as the input pointer
* by the following module.
*/
if (f->dc_lastsam)
*outp += (f->dc_lastsam<<1);
else
*outp += (ADPCMFSIZE<<1);
/*
* Now fix up state info to reflect the loop start point
*/
f->dc_lastsam = f->dc_loop.start &0xf;
f->dc_memin = (s32) f->dc_table->base + ADPCMFBYTES *
((s32) (f->dc_loop.start>>LFSAMPLES) + 1);
f->dc_sample = f->dc_loop.start;
bEnd = *outp;
while (outCount > nSam){
outCount -= nSam;
/*
* Put next one after the end of the last lot - on the
* frame boundary (32 byte) after the end.
*/
#if 0
op = (bEnd + ((nframes+1)<<(LFSAMPLES+1))) & ~0x1f;
#else
op = (bEnd + ((nframes+1)<<(LFSAMPLES+1)) + 16) & ~0x1f;
#endif
/*
* The actual end of data
*/
bEnd += (nSam<<1);
/*
* -1 is loop forever - the loop count is not exact now
* for small loops!
*/
if ((f->dc_loop.count != -1) && (f->dc_loop.count != 0))
f->dc_loop.count--;
/*
* What's left to compute.
*/
nSam = MIN(outCount, f->dc_loop.end - f->dc_loop.start);
tsam = nSam - ADPCMFSIZE + f->dc_lastsam;
if (tsam<0) tsam = 0;
nframes = (tsam+ADPCMFSIZE-1)>>LFSAMPLES;
nbytes = nframes*ADPCMFBYTES;
ptr = _decodeChunk(ptr, f, tsam, nbytes, op, inp, f->dc_first | A_LOOP);
/*
* Merge the two sections in DMEM.
*/
aDMEMMove(ptr++, op+(f->dc_lastsam<<1), bEnd, nSam<<1);
}
f->dc_lastsam = (outCount + f->dc_lastsam) & 0xf;
f->dc_sample += outCount;
f->dc_memin += ADPCMFBYTES*nframes;
#ifdef AUD_PROFILE
PROFILE_AUD(adpcm_num, adpcm_cnt, adpcm_max, adpcm_min);
#endif
return ptr;
}
/*
* The unlooped case, which is executed most of the time
*/
nSam = nframes<<LFSAMPLES;
/*
* overFlow is the number of bytes past the end
* of the bitstream I try to generate
*/
overFlow = f->dc_memin + nbytes - ((s32) f->dc_table->base + f->dc_table->len);
if (overFlow < 0)
overFlow = 0;
nOver = (overFlow/ADPCMFBYTES)<<LFSAMPLES;
if (nOver > nSam + nLeft)
nOver = nSam + nLeft;
nbytes -= overFlow;
if ((nOver - (nOver & 0xf))< outCount){
decoded = 1;
ptr = _decodeChunk(ptr, f, nSam - nOver, nbytes, *outp, inp, f->dc_first);
if (f->dc_lastsam)
*outp += (f->dc_lastsam<<1);
else
*outp += (ADPCMFSIZE<<1);
f->dc_lastsam = (outCount + f->dc_lastsam) & 0xf;
f->dc_sample += outCount;
f->dc_memin += ADPCMFBYTES*nframes;
} else {
f->dc_lastsam = 0;
f->dc_memin += ADPCMFBYTES*nframes;
}
/*
* Put zeros in if necessary
*/
if (nOver){
f->dc_lastsam = 0;
if (decoded)
startZero = (nLeft + nSam - nOver)<<1;
else
startZero = 0;
aClearBuffer(ptr++, startZero + *outp, nOver<<1);
}
#ifdef AUD_PROFILE
PROFILE_AUD(adpcm_num, adpcm_cnt, adpcm_max, adpcm_min);
#endif
return ptr;
}
s32
n_alLoadParam(N_PVoice *filter, s32 paramID, void *param)
{
N_PVoice *a = filter;
#if 0
ALFilter *f = (ALFilter *) filter;
#endif
switch (paramID) {
case (AL_FILTER_SET_WAVETABLE):
a->dc_table = (ALWaveTable *) param;
a->dc_memin = (s32) a->dc_table->base;
a->dc_sample = 0;
switch (a->dc_table->type){
case (AL_ADPCM_WAVE):
a->dc_table->len = ADPCMFBYTES *
((s32) (a->dc_table->len/ADPCMFBYTES));
a->dc_bookSize = 2*a->dc_table->waveInfo.adpcmWave.book->order*
a->dc_table->waveInfo.adpcmWave.book->npredictors*ADPCMVSIZE;
if (a->dc_table->waveInfo.adpcmWave.loop) {
a->dc_loop.start = a->dc_table->waveInfo.adpcmWave.loop->start;
a->dc_loop.end = a->dc_table->waveInfo.adpcmWave.loop->end;
a->dc_loop.count = a->dc_table->waveInfo.adpcmWave.loop->count;
alCopy(a->dc_table->waveInfo.adpcmWave.loop->state,
a->dc_lstate, sizeof(ADPCM_STATE));
} else {
a->dc_loop.start = a->dc_loop.end = a->dc_loop.count = 0;
}
break;
case (AL_RAW16_WAVE):
if (a->dc_table->waveInfo.rawWave.loop) {
a->dc_loop.start = a->dc_table->waveInfo.rawWave.loop->start;
a->dc_loop.end = a->dc_table->waveInfo.rawWave.loop->end;
a->dc_loop.count = a->dc_table->waveInfo.rawWave.loop->count;
} else {
a->dc_loop.start = a->dc_loop.end = a->dc_loop.count = 0;
}
break;
default:
break;
}
break;
case (AL_FILTER_RESET):
a->dc_lastsam = 0;
a->dc_first = 1;
a->dc_sample = 0;
/* sct 2/14/96 - Check table since it is initialized to null and */
/* Get loop info according to table type. */
if (a->dc_table)
{
a->dc_memin = (s32) a->dc_table->base;
if (a->dc_table->type == AL_ADPCM_WAVE)
{
if (a->dc_table->waveInfo.adpcmWave.loop)
a->dc_loop.count = a->dc_table->waveInfo.adpcmWave.loop->count;
}
else if (a->dc_table->type == AL_RAW16_WAVE)
{
if (a->dc_table->waveInfo.rawWave.loop)
a->dc_loop.count = a->dc_table->waveInfo.rawWave.loop->count;
}
}
break;
default:
break;
}
}
Acmd *_decodeChunk(Acmd *ptr, N_PVoice *f, s32 tsam,
s32 nbytes, s16 outp, s16 inp, u32 flags)
{
s32 dramAlign, dramLoc;
if (nbytes > 0){
dramLoc = (f->dc_dma)(f->dc_memin, nbytes, f->dc_dmaState);
/*
* Make sure enough is loaded into DMEM to take care
* of 8 byte alignment
*/
dramAlign = dramLoc & 0x7;
nbytes += dramAlign;
#ifndef N_MICRO
aSetBuffer(ptr++, 0, inp, 0, nbytes + 8 - (nbytes & 0x7));
aLoadBuffer(ptr++, dramLoc - dramAlign);
#else
#include "n_load_add01.c"
#endif
} else
dramAlign = 0;
if (flags & A_LOOP){
aSetLoop(ptr++, K0_TO_PHYS(f->dc_lstate));
}
#ifndef N_MICRO
aSetBuffer(ptr++, 0, inp + dramAlign, outp, tsam<<1);
aADPCMdec(ptr++, flags, K0_TO_PHYS(f->dc_state));
#else
#include "n_load_add02.c"
#endif
f->dc_first = 0;
return ptr;
}