core/conv: use proper filenames

We already have generic convolutional transcoding implementation
written by Sylvain Munaut and named 'conv.c', so 'viterbi_*' names
looked a bit confusing.

Let's use a single naming scheme for Viterbi related code.

Change-Id: I61062a8d1fbf5f5fc85b4fac58dc4e9fa8b5ef90

1 files changed, 0 insertions, 207 deletions

diff --git a/src/viterbi_generic.c b/src/viterbi_generic.c
deleted file mode 100644
index 60426685..00000000
--- a/src/viterbi_generic.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Viterbi decoder
- *
- * Copyright (C) 2013, 2014 Thomas Tsou <tom@tsou.cc>
- *
- * 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 along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-
-/* Add-Compare-Select (ACS-Butterfly)
- * Compute 4 accumulated path metrics and 4 path selections. Note that path
- * selections are store as -1 and 0 rather than 0 and 1. This is to match
- * the output format of the SSE packed compare instruction 'pmaxuw'.
- */
-
-static void acs_butterfly(int state, int num_states,
-	int16_t metric, int16_t *sum,
-	int16_t *new_sum, int16_t *path)
-{
-	int state0, state1;
-	int sum0, sum1, sum2, sum3;
-
-	state0 = *(sum + (2 * state + 0));
-	state1 = *(sum + (2 * state + 1));
-
-	sum0 = state0 + metric;
-	sum1 = state1 - metric;
-	sum2 = state0 - metric;
-	sum3 = state1 + metric;
-
-	if (sum0 >= sum1) {
-		*new_sum = sum0;
-		*path = -1;
-	} else {
-		*new_sum = sum1;
-		*path = 0;
-	}
-
-	if (sum2 >= sum3) {
-		*(new_sum + num_states / 2) = sum2;
-		*(path + num_states / 2) = -1;
-	} else {
-		*(new_sum + num_states / 2) = sum3;
-		*(path + num_states / 2) = 0;
-	}
-}
-
-/* Branch metrics unit N=2 */
-static void gen_branch_metrics_n2(int num_states, const int8_t *seq,
-	const int16_t *out, int16_t *metrics)
-{
-	int i;
-
-	for (i = 0; i < num_states / 2; i++) {
-		metrics[i] = seq[0] * out[2 * i + 0] +
-			seq[1] * out[2 * i + 1];
-	}
-}
-
-/* Branch metrics unit N=3 */
-static void gen_branch_metrics_n3(int num_states, const int8_t *seq,
-	const int16_t *out, int16_t *metrics)
-{
-	int i;
-
-	for (i = 0; i < num_states / 2; i++) {
-		metrics[i] = seq[0] * out[4 * i + 0] +
-			seq[1] * out[4 * i + 1] +
-			seq[2] * out[4 * i + 2];
-	}
-}
-
-/* Branch metrics unit N=4 */
-static void gen_branch_metrics_n4(int num_states, const int8_t *seq,
-	const int16_t *out, int16_t *metrics)
-{
-	int i;
-
-	for (i = 0; i < num_states / 2; i++) {
-		metrics[i] = seq[0] * out[4 * i + 0] +
-			seq[1] * out[4 * i + 1] +
-			seq[2] * out[4 * i + 2] +
-			seq[3] * out[4 * i + 3];
-	}
-}
-
-/* Path metric unit */
-static void gen_path_metrics(int num_states, int16_t *sums,
-	int16_t *metrics, int16_t *paths, int norm)
-{
-	int i;
-	int16_t min;
-	int16_t new_sums[num_states];
-
-	for (i = 0; i < num_states / 2; i++)
-		acs_butterfly(i, num_states, metrics[i],
-			sums, &new_sums[i], &paths[i]);
-
-	if (norm) {
-		min = new_sums[0];
-
-		for (i = 1; i < num_states; i++)
-			if (new_sums[i] < min)
-				min = new_sums[i];
-
-		for (i = 0; i < num_states; i++)
-			new_sums[i] -= min;
-	}
-
-	memcpy(sums, new_sums, num_states * sizeof(int16_t));
-}
-
-/* Not-aligned Memory Allocator */
-__attribute__ ((visibility("hidden")))
-int16_t *osmo_conv_gen_vdec_malloc(size_t n)
-{
-	return (int16_t *) malloc(sizeof(int16_t) * n);
-}
-
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_vdec_free(int16_t *ptr)
-{
-	free(ptr);
-}
-
-/* 16-state branch-path metrics units (K=5) */
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_metrics_k5_n2(const int8_t *seq, const int16_t *out,
-	int16_t *sums, int16_t *paths, int norm)
-{
-	int16_t metrics[8];
-
-	gen_branch_metrics_n2(16, seq, out, metrics);
-	gen_path_metrics(16, sums, metrics, paths, norm);
-}
-
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_metrics_k5_n3(const int8_t *seq, const int16_t *out,
-	int16_t *sums, int16_t *paths, int norm)
-{
-	int16_t metrics[8];
-
-	gen_branch_metrics_n3(16, seq, out, metrics);
-	gen_path_metrics(16, sums, metrics, paths, norm);
-
-}
-
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_metrics_k5_n4(const int8_t *seq, const int16_t *out,
-	int16_t *sums, int16_t *paths, int norm)
-{
-	int16_t metrics[8];
-
-	gen_branch_metrics_n4(16, seq, out, metrics);
-	gen_path_metrics(16, sums, metrics, paths, norm);
-
-}
-
-/* 64-state branch-path metrics units (K=7) */
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_metrics_k7_n2(const int8_t *seq, const int16_t *out,
-	int16_t *sums, int16_t *paths, int norm)
-{
-	int16_t metrics[32];
-
-	gen_branch_metrics_n2(64, seq, out, metrics);
-	gen_path_metrics(64, sums, metrics, paths, norm);
-
-}
-
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_metrics_k7_n3(const int8_t *seq, const int16_t *out,
-	int16_t *sums, int16_t *paths, int norm)
-{
-	int16_t metrics[32];
-
-	gen_branch_metrics_n3(64, seq, out, metrics);
-	gen_path_metrics(64, sums, metrics, paths, norm);
-
-}
-
-__attribute__ ((visibility("hidden")))
-void osmo_conv_gen_metrics_k7_n4(const int8_t *seq, const int16_t *out,
-	int16_t *sums, int16_t *paths, int norm)
-{
-	int16_t metrics[32];
-
-	gen_branch_metrics_n4(64, seq, out, metrics);
-	gen_path_metrics(64, sums, metrics, paths, norm);
-}