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Commit functions used by both AMRNB and SIPR
Originally committed as revision 20805 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -127,6 +127,26 @@ void ff_acelp_fc_pulse_per_track(
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fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192;
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}
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void ff_decode_10_pulses_35bits(const int16_t *fixed_index,
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AMRFixed *fixed_sparse,
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const uint8_t *gray_decode,
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int half_pulse_count, int bits)
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{
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int i;
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int mask = (1 << bits) - 1;
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fixed_sparse->n = 2 * half_pulse_count;
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for (i = 0; i < half_pulse_count; i++) {
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const int pos1 = gray_decode[fixed_index[2*i+1] & mask] + i;
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const int pos2 = gray_decode[fixed_index[2*i ] & mask] + i;
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const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0;
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fixed_sparse->x[2*i+1] = pos1;
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fixed_sparse->x[2*i ] = pos2;
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fixed_sparse->y[2*i+1] = sign;
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fixed_sparse->y[2*i ] = pos2 < pos1 ? -sign : sign;
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}
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}
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void ff_acelp_weighted_vector_sum(
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int16_t* out,
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const int16_t *in_a,
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@ -188,3 +208,37 @@ void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
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for (i = 0; i < n; i++)
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out[i] = in[i] * scalefactor;
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}
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void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size)
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{
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int i;
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for (i=0; i < in->n; i++) {
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int x = in->x[i];
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float y = in->y[i] * scale;
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out[x] += y;
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x += in->pitch_lag;
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while (x < size) {
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y *= in->pitch_fac;
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out[x] += y;
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x += in->pitch_lag;
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}
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}
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}
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void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size)
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{
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int i;
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for (i=0; i < in->n; i++) {
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int x = in->x[i];
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out[x] = 0.0;
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x += in->pitch_lag;
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while (x < size) {
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out[x] = 0.0;
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x += in->pitch_lag;
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}
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}
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}
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@ -25,6 +25,15 @@
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#include <stdint.h>
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/** Sparse representation for the algebraic codebook (fixed) vector */
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typedef struct {
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int n;
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int x[10];
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float y[10];
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int pitch_lag;
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float pitch_fac;
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} AMRFixed;
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/**
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* Track|Pulse| Positions
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* -------------------------------------------------------------------------
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@ -125,6 +134,24 @@ void ff_acelp_fc_pulse_per_track(
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int pulse_count,
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int bits);
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/**
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* Decode the algebraic codebook index to pulse positions and signs and
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* construct the algebraic codebook vector for MODE_12k2.
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*
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* @note: The positions and signs are explicitly coded in MODE_12k2.
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*
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* @param fixed_index positions of the ten pulses
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* @param fixed_sparse pointer to the algebraic codebook vector
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* @param gray_decode gray decoding table
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* @param half_pulse_count number of couples of pulses
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* @param bits length of one pulse index in bits
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*/
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void ff_decode_10_pulses_35bits(const int16_t *fixed_index,
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AMRFixed *fixed_sparse,
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const uint8_t *gray_decode,
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int half_pulse_count, int bits);
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/**
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* weighted sum of two vectors with rounding.
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* @param out [out] result of addition
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@ -194,4 +221,23 @@ void ff_adaptative_gain_control(float *buf_out, float speech_energ,
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void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
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float sum_of_squares, const int n);
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/**
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* Add fixed vector to an array from a sparse representation
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*
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* @param out fixed vector with pitch sharpening
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* @param in sparse fixed vector
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* @param scale number to multiply the fixed vector by
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* @param size the output vector size
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*/
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void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size);
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/**
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* Clear array values set by set_fixed_vector
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*
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* @param out fixed vector to be cleared
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* @param in sparse fixed vector
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* @param size the output vector size
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*/
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void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size);
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#endif /* AVCODEC_ACELP_VECTORS_H */
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