Mercurial > hg > xmms-sid
annotate src/xs_filter.c @ 312:7a5dc6898659
Fixed filter signedness bugs.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 30 Dec 2004 12:29:02 +0000 |
| parents | d5c79d5a0b60 |
| children | dd201740a720 |
| rev | line source |
|---|---|
| 278 | 1 /* |
| 2 XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS) | |
| 3 | |
| 4 Audio rate-conversion filter | |
| 5 | |
| 6 Written by Matti "ccr" Hamalainen <ccr@tnsp.org> | |
| 7 | |
| 8 This program is free software; you can redistribute it and/or modify | |
| 9 it under the terms of the GNU General Public License as published by | |
| 10 the Free Software Foundation; either version 2 of the License, or | |
| 11 (at your option) any later version. | |
| 12 | |
| 13 This program is distributed in the hope that it will be useful, | |
| 14 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 GNU General Public License for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with this program; if not, write to the Free Software | |
| 20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 21 */ | |
| 22 #include "xmms-sid.h" | |
| 23 | |
| 24 /* Let's do some preprocessor magic :) */ | |
| 25 #define XS_FVAR(T, P, K) g ## K ## int ## P *sp_ ## T ## P , *dp_ ## T ## P | |
| 26 | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
27 #define XS_FILTER1(T, P, K, Q) \ |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
28 dataSize /= sizeof(g ## K ## int ## P); tmpo = 0; \ |
| 278 | 29 sp_ ## T ## P = (g ## K ## int ## P *) srcBuf; \ |
| 30 dp_ ## T ## P = (g ## K ## int ## P *) destBuf; \ | |
| 280 | 31 while (dataSize-- > 0) { \ |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
32 for (tmp = 0, i = 0; i < oversampleFactor; i++) \ |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
33 tmp += (gint32) ((gint ## P) (*(sp_ ## T ## P ++) Q)); \ |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
34 tmpo = (tmp + tmpo) / (oversampleFactor + 1); \ |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
35 *(dp_ ## T ## P ++) = ((g ## K ## int ## P) tmpo) Q ; \ |
| 278 | 36 } |
| 37 | |
| 295 | 38 gint xs_rateconv_filter(void *destBuf, void *srcBuf, AFormat audioFormat, gint oversampleFactor, gint dataSize) |
| 278 | 39 { |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
40 gint32 tmp, tmpo; |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
41 XS_FVAR(s,8,); |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
42 XS_FVAR(u,8,u); |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
43 XS_FVAR(s,16,); |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
44 XS_FVAR(u,16,u); |
| 278 | 45 gint i; |
| 46 | |
| 47 if (dataSize <= 0) | |
| 48 return dataSize; | |
| 49 | |
| 50 switch (audioFormat) { | |
| 51 case FMT_U8: | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
52 XS_FILTER1(u,8,u, ^ 0x80) |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
53 break; |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
54 |
| 278 | 55 case FMT_S8: |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
56 XS_FILTER1(s,8,,) |
| 278 | 57 break; |
| 58 | |
| 59 | |
| 60 case FMT_U16_BE: | |
| 61 case FMT_U16_LE: | |
| 62 case FMT_U16_NE: | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
63 XS_FILTER1(u,16,u, ^ 0x8000) |
|
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
64 break; |
| 278 | 65 |
| 66 case FMT_S16_BE: | |
| 67 case FMT_S16_LE: | |
| 68 case FMT_S16_NE: | |
|
312
7a5dc6898659
Fixed filter signedness bugs.
Matti Hamalainen <ccr@tnsp.org>
parents:
295
diff
changeset
|
69 XS_FILTER1(s,16,,) |
| 278 | 70 break; |
| 71 | |
| 72 default: | |
| 73 return -1; | |
| 74 } | |
| 75 | |
| 76 return 0; | |
| 77 } | |
| 78 |