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-rw-r--r--apps/codecs/libtta/filter.h136
1 files changed, 0 insertions, 136 deletions
diff --git a/apps/codecs/libtta/filter.h b/apps/codecs/libtta/filter.h
deleted file mode 100644
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--- a/apps/codecs/libtta/filter.h
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * filter.h
- *
- * Description: TTAv1 filter functions
- * Developed by: Alexander Djourik <ald@true-audio.com>
- * Pavel Zhilin <pzh@true-audio.com>
- *
- * Copyright (c) 2004 True Audio Software. All rights reserved.
- *
- */
-
-/*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the True Audio Software nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef FILTER_H
-#define FILTER_H
-
-///////// Filter Settings //////////
-static int flt_set[3] = {10, 9, 10};
-
-#if defined(CPU_ARM) || defined(CPU_COLDFIRE)
-int hybrid_filter(fltst *fs, int *in); /* implements in filter_arm.S */
-
-#else
-
-static inline void
-memshl (register int *pA) {
- register int *pB = pA + 16;
-
- *pA++ = *pB++;
- *pA++ = *pB++;
- *pA++ = *pB++;
- *pA++ = *pB++;
- *pA++ = *pB++;
- *pA++ = *pB++;
- *pA++ = *pB++;
- *pA = *pB;
-}
-
-static inline void
-hybrid_filter (fltst *fs, int *in) {
- register int *pA = fs->dl + fs->index;
- register int *pB = fs->qm;
- register int *pM = fs->dx + fs->index;
- register int sum = fs->round;
-
- if (!fs->error) {
- sum += *pA++ * *pB++;
- sum += *pA++ * *pB++;
- sum += *pA++ * *pB++;
- sum += *pA++ * *pB++;
- sum += *pA++ * *pB++;
- sum += *pA++ * *pB++;
- sum += *pA++ * *pB++;
- sum += *pA * *pB;
- pM += 8;
- } else if (fs->error < 0) {
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA++ * (*pB++ -= *pM++);
- sum += *pA * (*pB -= *pM++);
- } else {
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA++ * (*pB++ += *pM++);
- sum += *pA * (*pB += *pM++);
- }
-
- pB = pA++;
- fs->error = *in;
- *in += (sum >> fs->shift);
- *pA = *in;
-
- *pM-- = ((*pB-- >> 30) | 1) << 2;
- *pM-- = ((*pB-- >> 30) | 1) << 1;
- *pM-- = ((*pB-- >> 30) | 1) << 1;
- *pM = ((*pB >> 30) | 1);
-
- *(pA-1) = *(pA-0) - *(pA-1);
- *(pA-2) = *(pA-1) - *(pA-2);
- *(pA-3) = *(pA-2) - *(pA-3);
-
- /*
- * Rockbox speciffic
- * in order to make speed up, memshl() is executed at the rate once every 16 times.
- */
- if (++fs->index == 16)
- {
- memshl (fs->dl);
- memshl (fs->dx);
- fs->index = 0;
- }
-}
-#endif
-
-static inline void
-filter_init (fltst *fs, int shift) {
- ci->memset (fs, 0, sizeof(fltst));
- fs->shift = shift;
- fs->round = 1 << (shift - 1);
- fs->index = 0;
-}
-
-#endif /* FILTER_H */