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Code Issues Releases Activity

Split the input/output data arguments to ff_adaptive_gain_control().

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Originally committed as revision 22932 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2010-04-21 17:43:52 +00:00
parent 8e6daa4a95
commit bb2dd9efd8
4 changed files with 9 additions and 7 deletions
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6
libavcodec/acelp_vectors.c
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@ -207,11 +207,11 @@ void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
+ weight_coeff_b * in_b[i];
}
void ff_adaptive_gain_control(float *buf_out, float speech_energ,
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(buf_out, buf_out, size);
float postfilter_energ = ff_dot_productf(in, in, size);
float gain_scale_factor = 1.0;
float mem = *gain_mem;
@ -222,7 +222,7 @@ void ff_adaptive_gain_control(float *buf_out, float speech_energ,
for (i = 0; i < size; i++) {
mem = alpha * mem + gain_scale_factor;
buf_out[i] *= mem;
out[i] = in[i] * mem;
}
*gain_mem = mem;

5
libavcodec/acelp_vectors.h
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@ -214,13 +214,14 @@ void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
/**
* Adaptive gain control (as used in AMR postfiltering)
*
* @param buf_out the input speech buffer
* @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 *buf_out, float speech_energ,
void ff_adaptive_gain_control(float *out, const float *in, float speech_energ,
int size, float alpha, float *gain_mem);
/**

2
libavcodec/amrnbdec.c
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@ -943,7 +943,7 @@ static void postfilter(AMRContext *p, float *lpc, float *buf_out)
ff_tilt_compensation(&p->tilt_mem, tilt_factor(lpc_n, lpc_d), buf_out,
AMR_SUBFRAME_SIZE);
ff_adaptive_gain_control(buf_out, speech_gain, AMR_SUBFRAME_SIZE,
ff_adaptive_gain_control(buf_out, buf_out, speech_gain, AMR_SUBFRAME_SIZE,
AMR_AGC_ALPHA, &p->postfilter_agc);
}

3
libavcodec/sipr.c
View File

@ -479,7 +479,8 @@ static void decode_frame(SiprContext *ctx, SiprParameters *params,
float energy = ff_dot_productf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE,
ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE,
SUBFR_SIZE);
ff_adaptive_gain_control(&synth[i * SUBFR_SIZE], energy,
ff_adaptive_gain_control(&synth[i * SUBFR_SIZE],
&synth[i * SUBFR_SIZE], energy,
SUBFR_SIZE, 0.9, &ctx->postfilter_agc);
}