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Diffstat (limited to 'gst/tta/filters.h')
| -rw-r--r-- | gst/tta/filters.h | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/gst/tta/filters.h b/gst/tta/filters.h deleted file mode 100644 index 9df5e1d43..000000000 --- a/gst/tta/filters.h +++ /dev/null @@ -1,110 +0,0 @@ -/* - * filters.h - * - * Description: TTAv1 filter functions - * Developed by: Alexander Djourik <sasha@iszf.irk.ru> - * Pavel Zhilin <pzh@iszf.irk.ru> - * - * Copyright (c) 1999-2004 Alexander Djourik. All rights reserved. - * - */ - -/* - * 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 - * aint with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please see the file COPYING in this directory for full copyright - * information. - */ - -#ifndef FILTERS_H -#define FILTERS_H - -///////// Filter Settings ////////// -static const long flt_set[3] = {10, 9, 10}; - -static void -memshl (register long *pA, register long *pB) { - *pA++ = *pB++; - *pA++ = *pB++; - *pA++ = *pB++; - *pA++ = *pB++; - *pA++ = *pB++; - *pA++ = *pB++; - *pA++ = *pB++; - *pA = *pB; -} - -static void -hybrid_filter (fltst *fs, long *in) { - register long *pA = fs->dl; - register long *pB = fs->qm; - register long *pM = fs->dx; - register long sum = fs->round; - - if (!fs->error) { - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; - sum += *pA++ * *pB, pB++; pM += 8; - } else if (fs->error < 0) { - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - sum += *pA++ * (*pB -= *pM++), pB++; - } else { - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - sum += *pA++ * (*pB += *pM++), pB++; - } - - *(pM-0) = ((*(pA-1) >> 30) | 1) << 2; - *(pM-1) = ((*(pA-2) >> 30) | 1) << 1; - *(pM-2) = ((*(pA-3) >> 30) | 1) << 1; - *(pM-3) = ((*(pA-4) >> 30) | 1); - - fs->error = *in; - *in += (sum >> fs->shift); - *pA = *in; - - *(pA-1) = *(pA-0) - *(pA-1); - *(pA-2) = *(pA-1) - *(pA-2); - *(pA-3) = *(pA-2) - *(pA-3); - - memshl (fs->dl, fs->dl + 1); - memshl (fs->dx, fs->dx + 1); -} - -static void -filter_init (fltst *fs, long shift) { - memset (fs, 0, sizeof(fltst)); - fs->shift = shift; - fs->round = 1 << (shift - 1); -} - -#endif /* FILTERS_H */ - |