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-rw-r--r--plugins/demac/libdemac/predictor.c271
1 files changed, 0 insertions, 271 deletions
diff --git a/plugins/demac/libdemac/predictor.c b/plugins/demac/libdemac/predictor.c
deleted file mode 100644
index 7d914b5f..00000000
--- a/plugins/demac/libdemac/predictor.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/*
-
-libdemac - A Monkey's Audio decoder
-
-$Id: predictor.c 19375 2008-12-09 23:20:59Z amiconn $
-
-Copyright (C) Dave Chapman 2007
-
-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
-along with this program; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
-
-*/
-
-#include <inttypes.h>
-#include <string.h>
-
-#include "parser.h"
-#include "predictor.h"
-#include "demac_config.h"
-
-/* Return 0 if x is zero, -1 if x is positive, 1 if x is negative */
-#define SIGN(x) (x) ? (((x) > 0) ? -1 : 1) : 0
-
-static const int32_t initial_coeffs[4] = {
- 360, 317, -109, 98
-};
-
-#define YDELAYA (18 + PREDICTOR_ORDER*4)
-#define YDELAYB (18 + PREDICTOR_ORDER*3)
-#define XDELAYA (18 + PREDICTOR_ORDER*2)
-#define XDELAYB (18 + PREDICTOR_ORDER)
-
-#define YADAPTCOEFFSA (18)
-#define XADAPTCOEFFSA (14)
-#define YADAPTCOEFFSB (10)
-#define XADAPTCOEFFSB (5)
-
-void init_predictor_decoder(struct predictor_t* p)
-{
- /* Zero the history buffers */
- memset(p->historybuffer, 0, PREDICTOR_SIZE * sizeof(int32_t));
- p->buf = p->historybuffer;
-
- /* Initialise and zero the co-efficients */
- memcpy(p->YcoeffsA, initial_coeffs, sizeof(initial_coeffs));
- memcpy(p->XcoeffsA, initial_coeffs, sizeof(initial_coeffs));
- memset(p->YcoeffsB, 0, sizeof(p->YcoeffsB));
- memset(p->XcoeffsB, 0, sizeof(p->XcoeffsB));
-
- p->YfilterA = 0;
- p->YfilterB = 0;
- p->YlastA = 0;
-
- p->XfilterA = 0;
- p->XfilterB = 0;
- p->XlastA = 0;
-}
-
-#if !defined(CPU_ARM) && !defined(CPU_COLDFIRE)
-void ICODE_ATTR_DEMAC predictor_decode_stereo(struct predictor_t* p,
- int32_t* decoded0,
- int32_t* decoded1,
- int count)
-{
- int32_t predictionA, predictionB;
-
- while (LIKELY(count--))
- {
- /* Predictor Y */
- p->buf[YDELAYA] = p->YlastA;
- p->buf[YADAPTCOEFFSA] = SIGN(p->buf[YDELAYA]);
-
- p->buf[YDELAYA-1] = p->buf[YDELAYA] - p->buf[YDELAYA-1];
- p->buf[YADAPTCOEFFSA-1] = SIGN(p->buf[YDELAYA-1]);
-
- predictionA = (p->buf[YDELAYA] * p->YcoeffsA[0]) +
- (p->buf[YDELAYA-1] * p->YcoeffsA[1]) +
- (p->buf[YDELAYA-2] * p->YcoeffsA[2]) +
- (p->buf[YDELAYA-3] * p->YcoeffsA[3]);
-
- /* Apply a scaled first-order filter compression */
- p->buf[YDELAYB] = p->XfilterA - ((p->YfilterB * 31) >> 5);
- p->buf[YADAPTCOEFFSB] = SIGN(p->buf[YDELAYB]);
- p->YfilterB = p->XfilterA;
-
- p->buf[YDELAYB-1] = p->buf[YDELAYB] - p->buf[YDELAYB-1];
- p->buf[YADAPTCOEFFSB-1] = SIGN(p->buf[YDELAYB-1]);
-
- predictionB = (p->buf[YDELAYB] * p->YcoeffsB[0]) +
- (p->buf[YDELAYB-1] * p->YcoeffsB[1]) +
- (p->buf[YDELAYB-2] * p->YcoeffsB[2]) +
- (p->buf[YDELAYB-3] * p->YcoeffsB[3]) +
- (p->buf[YDELAYB-4] * p->YcoeffsB[4]);
-
- p->YlastA = *decoded0 + ((predictionA + (predictionB >> 1)) >> 10);
- p->YfilterA = p->YlastA + ((p->YfilterA * 31) >> 5);
-
- /* Predictor X */
-
- p->buf[XDELAYA] = p->XlastA;
- p->buf[XADAPTCOEFFSA] = SIGN(p->buf[XDELAYA]);
- p->buf[XDELAYA-1] = p->buf[XDELAYA] - p->buf[XDELAYA-1];
- p->buf[XADAPTCOEFFSA-1] = SIGN(p->buf[XDELAYA-1]);
-
- predictionA = (p->buf[XDELAYA] * p->XcoeffsA[0]) +
- (p->buf[XDELAYA-1] * p->XcoeffsA[1]) +
- (p->buf[XDELAYA-2] * p->XcoeffsA[2]) +
- (p->buf[XDELAYA-3] * p->XcoeffsA[3]);
-
- /* Apply a scaled first-order filter compression */
- p->buf[XDELAYB] = p->YfilterA - ((p->XfilterB * 31) >> 5);
- p->buf[XADAPTCOEFFSB] = SIGN(p->buf[XDELAYB]);
- p->XfilterB = p->YfilterA;
- p->buf[XDELAYB-1] = p->buf[XDELAYB] - p->buf[XDELAYB-1];
- p->buf[XADAPTCOEFFSB-1] = SIGN(p->buf[XDELAYB-1]);
-
- predictionB = (p->buf[XDELAYB] * p->XcoeffsB[0]) +
- (p->buf[XDELAYB-1] * p->XcoeffsB[1]) +
- (p->buf[XDELAYB-2] * p->XcoeffsB[2]) +
- (p->buf[XDELAYB-3] * p->XcoeffsB[3]) +
- (p->buf[XDELAYB-4] * p->XcoeffsB[4]);
-
- p->XlastA = *decoded1 + ((predictionA + (predictionB >> 1)) >> 10);
- p->XfilterA = p->XlastA + ((p->XfilterA * 31) >> 5);
-
- if (LIKELY(*decoded0 != 0))
- {
- if (*decoded0 > 0)
- {
- p->YcoeffsA[0] -= p->buf[YADAPTCOEFFSA];
- p->YcoeffsA[1] -= p->buf[YADAPTCOEFFSA-1];
- p->YcoeffsA[2] -= p->buf[YADAPTCOEFFSA-2];
- p->YcoeffsA[3] -= p->buf[YADAPTCOEFFSA-3];
-
- p->YcoeffsB[0] -= p->buf[YADAPTCOEFFSB];
- p->YcoeffsB[1] -= p->buf[YADAPTCOEFFSB-1];
- p->YcoeffsB[2] -= p->buf[YADAPTCOEFFSB-2];
- p->YcoeffsB[3] -= p->buf[YADAPTCOEFFSB-3];
- p->YcoeffsB[4] -= p->buf[YADAPTCOEFFSB-4];
- }
- else
- {
- p->YcoeffsA[0] += p->buf[YADAPTCOEFFSA];
- p->YcoeffsA[1] += p->buf[YADAPTCOEFFSA-1];
- p->YcoeffsA[2] += p->buf[YADAPTCOEFFSA-2];
- p->YcoeffsA[3] += p->buf[YADAPTCOEFFSA-3];
-
- p->YcoeffsB[0] += p->buf[YADAPTCOEFFSB];
- p->YcoeffsB[1] += p->buf[YADAPTCOEFFSB-1];
- p->YcoeffsB[2] += p->buf[YADAPTCOEFFSB-2];
- p->YcoeffsB[3] += p->buf[YADAPTCOEFFSB-3];
- p->YcoeffsB[4] += p->buf[YADAPTCOEFFSB-4];
- }
- }
-
- *(decoded0++) = p->YfilterA;
-
- if (LIKELY(*decoded1 != 0))
- {
- if (*decoded1 > 0)
- {
- p->XcoeffsA[0] -= p->buf[XADAPTCOEFFSA];
- p->XcoeffsA[1] -= p->buf[XADAPTCOEFFSA-1];
- p->XcoeffsA[2] -= p->buf[XADAPTCOEFFSA-2];
- p->XcoeffsA[3] -= p->buf[XADAPTCOEFFSA-3];
-
- p->XcoeffsB[0] -= p->buf[XADAPTCOEFFSB];
- p->XcoeffsB[1] -= p->buf[XADAPTCOEFFSB-1];
- p->XcoeffsB[2] -= p->buf[XADAPTCOEFFSB-2];
- p->XcoeffsB[3] -= p->buf[XADAPTCOEFFSB-3];
- p->XcoeffsB[4] -= p->buf[XADAPTCOEFFSB-4];
- }
- else
- {
- p->XcoeffsA[0] += p->buf[XADAPTCOEFFSA];
- p->XcoeffsA[1] += p->buf[XADAPTCOEFFSA-1];
- p->XcoeffsA[2] += p->buf[XADAPTCOEFFSA-2];
- p->XcoeffsA[3] += p->buf[XADAPTCOEFFSA-3];
-
- p->XcoeffsB[0] += p->buf[XADAPTCOEFFSB];
- p->XcoeffsB[1] += p->buf[XADAPTCOEFFSB-1];
- p->XcoeffsB[2] += p->buf[XADAPTCOEFFSB-2];
- p->XcoeffsB[3] += p->buf[XADAPTCOEFFSB-3];
- p->XcoeffsB[4] += p->buf[XADAPTCOEFFSB-4];
- }
- }
-
- *(decoded1++) = p->XfilterA;
-
- /* Combined */
- p->buf++;
-
- /* Have we filled the history buffer? */
- if (UNLIKELY(p->buf == p->historybuffer + PREDICTOR_HISTORY_SIZE)) {
- memmove(p->historybuffer, p->buf,
- PREDICTOR_SIZE * sizeof(int32_t));
- p->buf = p->historybuffer;
- }
- }
-}
-
-void ICODE_ATTR_DEMAC predictor_decode_mono(struct predictor_t* p,
- int32_t* decoded0,
- int count)
-{
- int32_t predictionA, currentA, A;
-
- currentA = p->YlastA;
-
- while (LIKELY(count--))
- {
- A = *decoded0;
-
- p->buf[YDELAYA] = currentA;
- p->buf[YDELAYA-1] = p->buf[YDELAYA] - p->buf[YDELAYA-1];
-
- predictionA = (p->buf[YDELAYA] * p->YcoeffsA[0]) +
- (p->buf[YDELAYA-1] * p->YcoeffsA[1]) +
- (p->buf[YDELAYA-2] * p->YcoeffsA[2]) +
- (p->buf[YDELAYA-3] * p->YcoeffsA[3]);
-
- currentA = A + (predictionA >> 10);
-
- p->buf[YADAPTCOEFFSA] = SIGN(p->buf[YDELAYA]);
- p->buf[YADAPTCOEFFSA-1] = SIGN(p->buf[YDELAYA-1]);
-
- if (LIKELY(A != 0))
- {
- if (A > 0)
- {
- p->YcoeffsA[0] -= p->buf[YADAPTCOEFFSA];
- p->YcoeffsA[1] -= p->buf[YADAPTCOEFFSA-1];
- p->YcoeffsA[2] -= p->buf[YADAPTCOEFFSA-2];
- p->YcoeffsA[3] -= p->buf[YADAPTCOEFFSA-3];
- }
- else
- {
- p->YcoeffsA[0] += p->buf[YADAPTCOEFFSA];
- p->YcoeffsA[1] += p->buf[YADAPTCOEFFSA-1];
- p->YcoeffsA[2] += p->buf[YADAPTCOEFFSA-2];
- p->YcoeffsA[3] += p->buf[YADAPTCOEFFSA-3];
- }
- }
-
- p->buf++;
-
- /* Have we filled the history buffer? */
- if (UNLIKELY(p->buf == p->historybuffer + PREDICTOR_HISTORY_SIZE)) {
- memmove(p->historybuffer, p->buf,
- PREDICTOR_SIZE * sizeof(int32_t));
- p->buf = p->historybuffer;
- }
-
- p->YfilterA = currentA + ((p->YfilterA * 31) >> 5);
- *(decoded0++) = p->YfilterA;
- }
-
- p->YlastA = currentA;
-}
-#endif
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