lavc/opus*: move to opus/ subdir

1 files changed, 0 insertions, 90 deletions

diff --git a/libavcodec/opusenc_utils.h b/libavcodec/opusenc_utils.h
deleted file mode 100644
index c76295979a..0000000000
--- a/libavcodec/opusenc_utils.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Opus encoder
- * Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVCODEC_OPUSENC_UTILS_H
-#define AVCODEC_OPUSENC_UTILS_H
-
-#include <math.h>
-#include <string.h>
-
-#include "opus.h"
-
-typedef struct FFBesselFilter {
-    float a[3];
-    float b[2];
-    float x[3];
-    float y[3];
-} FFBesselFilter;
-
-/* Fills the coefficients, returns 1 if filter will be unstable */
-static inline int bessel_reinit(FFBesselFilter *s, float n, float f0, float fs,
-                                int highpass)
-{
-    int unstable;
-    float c, cfreq, w0, k1, k2;
-
-    if (!highpass) {
-        c = (1.0f/sqrtf(sqrtf(pow(2.0f, 1.0f/n) - 3.0f/4.0f) - 0.5f))/sqrtf(3.0f);
-        cfreq = c*f0/fs;
-        unstable = (cfreq <= 0.0f || cfreq >= 1.0f/4.0f);
-    } else {
-        c = sqrtf(3.0f)*sqrtf(sqrtf(pow(2.0f, 1.0f/n) - 3.0f/4.0f) - 0.5f);
-        cfreq = 0.5f - c*f0/fs;
-        unstable = (cfreq <= 3.0f/8.0f || cfreq >= 1.0f/2.0f);
-    }
-
-    w0 = tanf(M_PI*cfreq);
-    k1 = 3.0f * w0;
-    k2 = 3.0f * w0;
-
-    s->a[0] = k2/(1.0f + k1 + k2);
-    s->a[1] = 2.0f * s->a[0];
-    s->a[2] = s->a[0];
-    s->b[0] = 2.0f * s->a[0] * (1.0f/k2 - 1.0f);
-    s->b[1] = 1.0f - (s->a[0] + s->a[1] + s->a[2] + s->b[0]);
-
-    if (highpass) {
-        s->a[1] *= -1;
-        s->b[0] *= -1;
-    }
-
-    return unstable;
-}
-
-static inline int bessel_init(FFBesselFilter *s, float n, float f0, float fs,
-                              int highpass)
-{
-    memset(s, 0, sizeof(FFBesselFilter));
-    return bessel_reinit(s, n, f0, fs, highpass);
-}
-
-static inline float bessel_filter(FFBesselFilter *s, float x)
-{
-    s->x[2] = s->x[1];
-    s->x[1] = s->x[0];
-    s->x[0] = x;
-    s->y[2] = s->y[1];
-    s->y[1] = s->y[0];
-    s->y[0] = s->a[0]*s->x[0] + s->a[1]*s->x[1] + s->a[2]*s->x[2] + s->b[0]*s->y[1] + s->b[1]*s->y[2];
-    return s->y[0];
-}
-
-#endif /* AVCODEC_OPUSENC_UTILS_H */