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@@ -405,31 +405,6 @@ static void compute_svector(QCELPContext *q, const float *gain, |
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} |
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} |
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/** |
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* Compute the gain control |
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* |
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* @param v_in gain-controlled vector |
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* @param v_ref vector to control gain of |
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* |
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* @return gain control |
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* |
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* FIXME: If v_ref is a zero vector, it energy is zero |
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* and the behavior of the gain control is |
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* undefined in the specs. |
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* |
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* TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6 |
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*/ |
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static float compute_gain_ctrl(const float *v_ref, const float *v_in, const int len) |
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{ |
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float scalefactor = ff_dot_productf(v_in, v_in, len); |
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if(scalefactor) |
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scalefactor = sqrt(ff_dot_productf(v_ref, v_ref, len) / scalefactor); |
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else |
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av_log_missing_feature(NULL, "Zero energy for gain control", 1); |
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return scalefactor; |
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} |
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/** |
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* Apply generic gain control. |
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* |
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@@ -442,15 +417,13 @@ static float compute_gain_ctrl(const float *v_ref, const float *v_in, const int |
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static void apply_gain_ctrl(float *v_out, const float *v_ref, |
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const float *v_in) |
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{ |
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int i, j, len; |
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float scalefactor; |
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int i; |
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for(i=0, j=0; i<4; i++) |
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{ |
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scalefactor = compute_gain_ctrl(v_ref + j, v_in + j, 40); |
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for(len=j+40; j<len; j++) |
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v_out[j] = scalefactor * v_in[j]; |
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} |
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for (i = 0; i < 160; i += 40) |
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ff_scale_vector_to_given_sum_of_squares(v_out + i, v_in + i, |
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ff_dot_productf(v_ref + i, |
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v_ref + i, 40), |
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40); |
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} |
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/** |
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