*
* 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 "libavutil/common.h"
#include "avcodec.h"
+#include "dsputil.h"
#include "acelp_vectors.h"
const uint8_t ff_fc_2pulses_9bits_track1[16] =
28, 26,
};
-const uint8_t ff_fc_2pulses_9bits_track2_gray[32] =
-{
- 0, 2,
- 5, 4,
- 12, 10,
- 7, 9,
- 25, 24,
- 20, 22,
- 14, 15,
- 19, 17,
- 36, 31,
- 21, 26,
- 1, 6,
- 16, 11,
- 27, 29,
- 32, 30,
- 39, 37,
- 34, 35,
-};
-
const uint8_t ff_fc_4pulses_8bits_tracks_13[16] =
{
0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75,
78, 79,
};
-#if 0
-static uint8_t gray_decode[32] =
-{
- 0, 1, 3, 2, 7, 6, 4, 5,
- 15, 14, 12, 13, 8, 9, 11, 10,
- 31, 30, 28, 29, 24, 25, 27, 26,
- 16, 17, 19, 18, 23, 22, 20, 21
+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.
};
-#endif
void ff_acelp_fc_pulse_per_track(
int16_t* fc_v,
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,
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_scalarproduct_float_c(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_scalarproduct_float_c(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);
+ }
+}
projects / ffmpeg / blobdiff