*
* 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
*/
-#ifndef FFMPEG_ACELP_VECTORS_H
-#define FFMPEG_ACELP_VECTORS_H
+#ifndef AVCODEC_ACELP_VECTORS_H
+#define AVCODEC_ACELP_VECTORS_H
#include <stdint.h>
+/** Sparse representation for the algebraic codebook (fixed) vector */
+typedef struct AMRFixed {
+ int n;
+ int x[10];
+ float y[10];
+ int no_repeat_mask;
+ int pitch_lag;
+ float pitch_fac;
+} AMRFixed;
+
/**
* Track|Pulse| Positions
* -------------------------------------------------------------------------
*
* Table contains only first the pulse indexes.
*
- * Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k
+ * Used in G.729 @@8k, G.729 @@4.4k, AMR @@7.95k, AMR @@7.40k
*/
extern const uint8_t ff_fc_4pulses_8bits_tracks_13[16];
*
* @remark Track in the table should be read top-to-bottom, left-to-right.
*
- * Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k
+ * Used in G.729 @@8k, G.729 @@4.4k, AMR @@7.95k, AMR @@7.40k
*/
extern const uint8_t ff_fc_4pulses_8bits_track_4[32];
* @note (EE) Reference G.729D code also uses gray decoding for each
* pulse index before looking up the value in the table.
*
- * Used in G.729 @6.4k (with gray coding), AMR @5.9k (without gray coding)
+ * Used in G.729 @@6.4k (with gray coding), AMR @@5.9k (without gray coding)
*/
extern const uint8_t ff_fc_2pulses_9bits_track1[16];
extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16];
/**
- * Track|Pulse| Positions
- * -----------------------------------------
- * 2 | 1 | 0, 7, 14, 20, 27, 34, 1, 21
- * | | 2, 9, 15, 22, 29, 35, 6, 26
- * | | 4,10, 17, 24, 30, 37, 11, 31
- * | | 5,12, 19, 25, 32, 39, 16, 36
- * -----------------------------------------
- *
- * @remark Track in the table should be read top-to-bottom, left-to-right.
- *
- * @note (EE.1) This table (from the reference code) does not comply with
- * the specification.
- * The specification contains the following table:
- *
- * Track|Pulse| Positions
- * -----------------------------------------
- * 2 | 1 | 0, 5, 10, 15, 20, 25, 30, 35
- * | | 1, 6, 11, 16, 21, 26, 31, 36
- * | | 2, 7, 12, 17, 22, 27, 32, 37
- * | | 4, 9, 14, 19, 24, 29, 34, 39
- *
- * -----------------------------------------
- *
- * @note (EE.2) Reference G.729D code also uses gray decoding for each
- * pulse index before looking up the value in the table.
- *
- * Used in G.729 @6.4k (with gray coding)
+ * b60 hamming windowed sinc function coefficients
*/
-extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32];
+extern const float ff_b60_sinc[61];
+
+/**
+ * Table of pow(0.7,n)
+ */
+extern const float ff_pow_0_7[10];
+
+/**
+ * Table of pow(0.75,n)
+ */
+extern const float ff_pow_0_75[10];
+
+/**
+ * Table of pow(0.55,n)
+ */
+extern const float ff_pow_0_55[10];
/**
* Decode fixed-codebook vector (3.8 and D.5.8 of G.729, 5.7.1 of AMR).
- * @param fc_v [out] decoded fixed codebook vector (2.13)
+ * @param[out] fc_v decoded fixed codebook vector (2.13)
* @param tab1 table used for first pulse_count pulses
* @param tab2 table used for last pulse
* @param pulse_indexes fixed codebook indexes
* @param pulse_count number of pulses decoded using first table
* @param bits length of one pulse index in bits
*
- * Used in G.729 @8k, G.729 @4.4k, G.729 @6.4k, AMR @7.95k, AMR @7.40k
+ * Used in G.729 @@8k, G.729 @@4.4k, G.729 @@6.4k, AMR @@7.95k, AMR @@7.40k
*/
-void ff_acelp_fc_pulse_per_track(
- int16_t* fc_v,
- const uint8_t *tab1,
- const uint8_t *tab2,
- int pulse_indexes,
- int pulse_signs,
- int pulse_count,
- int bits);
+void ff_acelp_fc_pulse_per_track(int16_t* fc_v,
+ const uint8_t *tab1,
+ const uint8_t *tab2,
+ int pulse_indexes,
+ int pulse_signs,
+ int pulse_count,
+ int bits);
+
+/**
+ * Decode the algebraic codebook index to pulse positions and signs and
+ * construct the algebraic codebook vector for MODE_12k2.
+ *
+ * @note: The positions and signs are explicitly coded in MODE_12k2.
+ *
+ * @param fixed_index positions of the ten pulses
+ * @param fixed_sparse pointer to the algebraic codebook vector
+ * @param gray_decode gray decoding table
+ * @param half_pulse_count number of couples of pulses
+ * @param bits length of one pulse index in bits
+ */
+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);
+
/**
* weighted sum of two vectors with rounding.
- * @param out [out] result of addition
+ * @param[out] out result of addition
* @param in_a first vector
* @param in_b second vector
* @param weight_coeff_a first vector weight coefficient
*
* out[i] = (in_a[i]*weight_a + in_b[i]*weight_b + rounder) >> shift
*/
-void ff_acelp_weighted_vector_sum(
- int16_t* out,
- const int16_t *in_a,
- const int16_t *in_b,
- int16_t weight_coeff_a,
- int16_t weight_coeff_b,
- int16_t rounder,
- int shift,
- int length);
-
-#endif /* FFMPEG_ACELP_VECTORS_H */
+void ff_acelp_weighted_vector_sum(int16_t* out,
+ const int16_t *in_a,
+ const int16_t *in_b,
+ int16_t weight_coeff_a,
+ int16_t weight_coeff_b,
+ int16_t rounder,
+ int shift,
+ int length);
+
+/**
+ * float implementation of weighted sum of two vectors.
+ * @param[out] out result of addition
+ * @param in_a first vector
+ * @param in_b second vector
+ * @param weight_coeff_a first vector weight coefficient
+ * @param weight_coeff_a second vector weight coefficient
+ * @param length vectors length
+ *
+ * @note It is safe to pass the same buffer for out and in_a or in_b.
+ */
+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);
+
+/**
+ * Adaptive gain control (as used in AMR postfiltering)
+ *
+ * @param out output buffer for filtered speech data
+ * @param in the input speech buffer (may be the same as out)
+ * @param speech_energ input energy
+ * @param size the input buffer size
+ * @param alpha exponential filter factor
+ * @param gain_mem a pointer to the filter memory (single float of size)
+ */
+void ff_adaptive_gain_control(float *out, const float *in, float speech_energ,
+ int size, float alpha, float *gain_mem);
+
+/**
+ * Set the sum of squares of a signal by scaling
+ *
+ * @param out output samples
+ * @param in input samples
+ * @param sum_of_squares new sum of squares
+ * @param n number of samples
+ *
+ * @note If the input is zero (or its energy underflows), the output is zero.
+ * This is the behavior of AGC in the AMR reference decoder. The QCELP
+ * reference decoder seems to have undefined behavior.
+ *
+ * TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6
+ * 3GPP TS 26.090 6.1 (6)
+ */
+void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
+ float sum_of_squares, const int n);
+
+/**
+ * Add fixed vector to an array from a sparse representation
+ *
+ * @param out fixed vector with pitch sharpening
+ * @param in sparse fixed vector
+ * @param scale number to multiply the fixed vector by
+ * @param size the output vector size
+ */
+void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size);
+
+/**
+ * Clear array values set by set_fixed_vector
+ *
+ * @param out fixed vector to be cleared
+ * @param in sparse fixed vector
+ * @param size the output vector size
+ */
+void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size);
+
+#endif /* AVCODEC_ACELP_VECTORS_H */
projects / ffmpeg / blobdiff