X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Facelp_vectors.c;h=8e59e4beabc84de3d70b739a211248a9cd8dc83c;hb=84465f2180308a3e998089517e76586563fd6162;hp=cae6318fa0c7c60e6a085dbcf5177335919f0e39;hpb=1384e2705470e9603a2ed2fdaff801a9cc6b2758;p=ffmpeg

diff --git a/libavcodec/acelp_vectors.c b/libavcodec/acelp_vectors.c
index cae6318fa0c..8e59e4beabc 100644
--- a/libavcodec/acelp_vectors.c
+++ b/libavcodec/acelp_vectors.c
@@ -3,26 +3,27 @@
  *
  * Copyright (c) 2008 Vladimir Voroshilov
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <inttypes.h>
 #include "avcodec.h"
 #include "acelp_vectors.h"
+#include "celp_math.h"
 
 const uint8_t ff_fc_2pulses_9bits_track1[16] =
 {
@@ -102,6 +103,35 @@ static uint8_t gray_decode[32] =
 };
 #endif
 
+const float ff_pow_0_7[10] = {
+    0.700000, 0.490000, 0.343000, 0.240100, 0.168070,
+    0.117649, 0.082354, 0.057648, 0.040354, 0.028248
+};
+
+const float ff_pow_0_75[10] = {
+    0.750000, 0.562500, 0.421875, 0.316406, 0.237305,
+    0.177979, 0.133484, 0.100113, 0.075085, 0.056314
+};
+
+const float ff_pow_0_55[10] = {
+    0.550000, 0.302500, 0.166375, 0.091506, 0.050328,
+    0.027681, 0.015224, 0.008373, 0.004605, 0.002533
+};
+
+const float ff_b60_sinc[61] = {
+ 0.898529  ,  0.865051  ,  0.769257  ,  0.624054  ,  0.448639  ,  0.265289   ,
+ 0.0959167 , -0.0412598 , -0.134338  , -0.178986  , -0.178528  , -0.142609   ,
+-0.0849304 , -0.0205078 ,  0.0369568 ,  0.0773926 ,  0.0955200 ,  0.0912781  ,
+ 0.0689392 ,  0.0357056 ,  0.        , -0.0305481 , -0.0504150 , -0.0570068  ,
+-0.0508423 , -0.0350037 , -0.0141602 ,  0.00665283,  0.0230713 ,  0.0323486  ,
+ 0.0335388 ,  0.0275879 ,  0.0167847 ,  0.00411987, -0.00747681, -0.0156860  ,
+-0.0193481 , -0.0183716 , -0.0137634 , -0.00704956,  0.        ,  0.00582886 ,
+ 0.00939941,  0.0103760 ,  0.00903320,  0.00604248,  0.00238037, -0.00109863 ,
+-0.00366211, -0.00497437, -0.00503540, -0.00402832, -0.00241089, -0.000579834,
+ 0.00103760,  0.00222778,  0.00277710,  0.00271606,  0.00213623,  0.00115967 ,
+ 0.
+};
+
 void ff_acelp_fc_pulse_per_track(
         int16_t* fc_v,
         const uint8_t *tab1,
@@ -126,6 +156,27 @@ void ff_acelp_fc_pulse_per_track(
     fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192;
 }
 
+void ff_decode_10_pulses_35bits(const int16_t *fixed_index,
+                                AMRFixed *fixed_sparse,
+                                const uint8_t *gray_decode,
+                                int half_pulse_count, int bits)
+{
+    int i;
+    int mask = (1 << bits) - 1;
+
+    fixed_sparse->no_repeat_mask = 0;
+    fixed_sparse->n = 2 * half_pulse_count;
+    for (i = 0; i < half_pulse_count; i++) {
+        const int pos1   = gray_decode[fixed_index[2*i+1] & mask] + i;
+        const int pos2   = gray_decode[fixed_index[2*i  ] & mask] + i;
+        const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0;
+        fixed_sparse->x[2*i+1] = pos1;
+        fixed_sparse->x[2*i  ] = pos2;
+        fixed_sparse->y[2*i+1] = sign;
+        fixed_sparse->y[2*i  ] = pos2 < pos1 ? -sign : sign;
+    }
+}
+
 void ff_acelp_weighted_vector_sum(
         int16_t* out,
         const int16_t *in_a,
@@ -145,3 +196,75 @@ void ff_acelp_weighted_vector_sum(
                  in_b[i] * weight_coeff_b +
                  rounder) >> shift);
 }
+
+void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
+                             float weight_coeff_a, float weight_coeff_b, int length)
+{
+    int i;
+
+    for(i=0; i<length; i++)
+        out[i] = weight_coeff_a * in_a[i]
+               + weight_coeff_b * in_b[i];
+}
+
+void ff_adaptive_gain_control(float *out, const float *in, float speech_energ,
+                              int size, float alpha, float *gain_mem)
+{
+    int i;
+    float postfilter_energ = ff_dot_productf(in, in, size);
+    float gain_scale_factor = 1.0;
+    float mem = *gain_mem;
+
+    if (postfilter_energ)
+        gain_scale_factor = sqrt(speech_energ / postfilter_energ);
+
+    gain_scale_factor *= 1.0 - alpha;
+
+    for (i = 0; i < size; i++) {
+        mem = alpha * mem + gain_scale_factor;
+        out[i] = in[i] * mem;
+    }
+
+    *gain_mem = mem;
+}
+
+void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
+                                             float sum_of_squares, const int n)
+{
+    int i;
+    float scalefactor = ff_dot_productf(in, in, n);
+    if (scalefactor)
+        scalefactor = sqrt(sum_of_squares / scalefactor);
+    for (i = 0; i < n; i++)
+        out[i] = in[i] * scalefactor;
+}
+
+void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size)
+{
+    int i;
+
+    for (i=0; i < in->n; i++) {
+        int x   = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1);
+        float y = in->y[i] * scale;
+
+        do {
+            out[x] += y;
+            y *= in->pitch_fac;
+            x += in->pitch_lag;
+        } while (x < size && repeats);
+    }
+}
+
+void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size)
+{
+    int i;
+
+    for (i=0; i < in->n; i++) {
+        int x  = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1);
+
+        do {
+            out[x] = 0.0;
+            x += in->pitch_lag;
+        } while (x < size && repeats);
+    }
+}