Mercurial > hg > xmms-sid
annotate src/xs_filter.c @ 331:5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 22 Sep 2005 01:53:05 +0000 |
| parents | 7888e5d973b9 |
| children | b1a858b8cb1a |
| rev | line source |
|---|---|
| 278 | 1 /* |
| 2 XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS) | |
| 3 | |
| 4 Audio rate-conversion filter | |
| 5 | |
| 324 | 6 Programmed and designed by Matti 'ccr' Hamalainen <ccr@tnsp.org> |
| 7 (C) Copyright 1999-2005 Tecnic Software productions (TNSP) | |
| 278 | 8 |
| 9 This program is free software; you can redistribute it and/or modify | |
| 10 it under the terms of the GNU General Public License as published by | |
| 11 the Free Software Foundation; either version 2 of the License, or | |
| 12 (at your option) any later version. | |
| 13 | |
| 14 This program is distributed in the hope that it will be useful, | |
| 15 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 GNU General Public License for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 20 along with this program; if not, write to the Free Software | |
| 21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 22 */ | |
| 324 | 23 #include "xs_filter.h" |
| 278 | 24 |
| 25 /* Let's do some preprocessor magic :) */ | |
| 26 #define XS_FVAR(T, P, K) g ## K ## int ## P *sp_ ## T ## P , *dp_ ## T ## P | |
| 27 | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
28 #define XS_FILTER1(T, P, K, Q) \ |
|
331
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
29 dataSize /= sizeof(g ## K ## int ## P); \ |
| 278 | 30 sp_ ## T ## P = (g ## K ## int ## P *) srcBuf; \ |
| 31 dp_ ## T ## P = (g ## K ## int ## P *) destBuf; \ | |
| 280 | 32 while (dataSize-- > 0) { \ |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
33 for (tmp = 0, i = 0; i < oversampleFactor; i++) \ |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
34 tmp += (gint32) ((gint ## P) (*(sp_ ## T ## P ++) Q)); \ |
|
331
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
35 xs_filter_mbn = (tmp + xs_filter_mbn) / (oversampleFactor + 1); \ |
|
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
36 *(dp_ ## T ## P ++) = ((g ## K ## int ## P) xs_filter_mbn) Q ; \ |
| 278 | 37 } |
| 38 | |
|
331
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
39 |
|
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
40 static gint32 xs_filter_mbn = 0; |
|
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
41 |
|
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
42 |
| 328 | 43 gint xs_filter_rateconv(void *destBuf, void *srcBuf, const AFormat audioFormat, const gint oversampleFactor, const gint bufSize) |
| 278 | 44 { |
|
331
5e82b21d1914
Minor fix to filter (mean value does not get reset on every filtered audio block)
Matti Hamalainen <ccr@tnsp.org>
parents:
328
diff
changeset
|
45 static gint32 tmp; |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
46 XS_FVAR(s,8,); |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
47 XS_FVAR(u,8,u); |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
48 XS_FVAR(s,16,); |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
49 XS_FVAR(u,16,u); |
| 278 | 50 gint i; |
| 328 | 51 gint dataSize = bufSize; |
| 278 | 52 |
| 53 if (dataSize <= 0) | |
| 54 return dataSize; | |
| 55 | |
| 56 switch (audioFormat) { | |
| 57 case FMT_U8: | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
58 XS_FILTER1(u,8,u, ^ 0x80) |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
59 break; |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
60 |
| 278 | 61 case FMT_S8: |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
62 XS_FILTER1(s,8,,) |
| 278 | 63 break; |
| 64 | |
| 65 | |
| 66 case FMT_U16_BE: | |
| 67 case FMT_U16_LE: | |
| 68 case FMT_U16_NE: | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
69 XS_FILTER1(u,16,u, ^ 0x8000) |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
70 break; |
| 278 | 71 |
| 72 case FMT_S16_BE: | |
| 73 case FMT_S16_LE: | |
| 74 case FMT_S16_NE: | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
75 XS_FILTER1(s,16,,) |
| 278 | 76 break; |
| 77 | |
| 78 default: | |
| 79 return -1; | |
| 80 } | |
| 81 | |
| 82 return 0; | |
| 83 } | |
| 84 |