/src/speex/libspeex/vbr.c

Source
/* Copyright (C) 2002 Jean-Marc Valin
   File: vbr.c

   VBR-related routines

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   - Neither the name of the Xiph.org Foundation nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "vbr.h"
#include <math.h>


#define sqr(x) ((x)*(x))

#define MIN_ENERGY 6000
#define NOISE_POW .3

#ifndef DISABLE_VBR

const float vbr_nb_thresh[9][11]={
   {-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /*   CNG   */
   { 4.0f,  2.5f,  2.0f,  1.2f,  0.5f,-0.25f, -0.5f, -0.7f, -0.8f, -0.9f, -1.0f}, /*  2 kbps */
   {10.0f,  6.5f,  5.2f,  4.5f,  3.9f, 3.7f,  3.0f,  2.5f,  2.3f,  1.8f,  1.0f}, /*  6 kbps */
   {11.0f,  8.8f,  7.5f,  6.5f,  5.0f,  4.2f,  3.9f,  3.9f,  3.5f,  3.0f,  1.0f}, /*  8 kbps */
   {11.0f, 11.0f,  9.9f,  8.5f,  7.0f, 5.25f,  4.5f,  4.0f,  4.0f,  4.0f,  2.0f}, /* 11 kbps */
   {11.0f, 11.0f, 11.0f, 11.0f,  9.5f, 9.25f,  8.0f,  7.0f,  5.0f,  4.0f,  3.0f}, /* 15 kbps */
   {11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f,  9.5f,  8.5f,  6.2f,  5.2f,  5.0f}, /* 18 kbps */
   {11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 10.0f,  9.8f,  7.5f}, /* 24 kbps */
   { 7.0f,  4.5f,  3.7f,  3.0f,  2.5f,  1.0f,  1.8f,  1.5f,  1.0f,  0.0f,  0.0f}  /*  4 kbps */
};


const float vbr_hb_thresh[5][11]={
   {-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /* silence */
   {-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /*  2 kbps */
   {11.0f, 11.0f,  9.5f,  8.5f,  7.5f,  6.0f,  5.0f,  3.9f,  3.0f,  2.0f,  1.0f}, /*  6 kbps */
   {11.0f, 11.0f, 11.0f, 11.0f, 11.0f,  9.5f,  8.7f,  7.8f,  7.0f,  6.5f,  4.0f}, /* 10 kbps */
   {11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f,  9.8f,  7.5f,  5.5f}  /* 18 kbps */
};

const float vbr_uhb_thresh[2][11]={
   {-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /* silence */
   { 3.9f,  2.5f,  0.0f,  0.0f,  0.0f,  0.0f,  0.0f,  0.0f,  0.0f,  0.0f, -1.0f}  /*  2 kbps */
};

void vbr_init(VBRState *vbr)
{
   int i;

   vbr->average_energy=1600000;
   vbr->last_energy=1;
   vbr->accum_sum=0;
   vbr->soft_pitch=0;
   vbr->last_pitch_coef=0;
   vbr->last_quality=0;

   vbr->noise_accum = .05*pow(MIN_ENERGY, NOISE_POW);
   vbr->noise_accum_count=.05;
   vbr->noise_level=vbr->noise_accum/vbr->noise_accum_count;
   vbr->consec_noise=0;


   for (i=0;i<VBR_MEMORY_SIZE;i++)
      vbr->last_log_energy[i] = log(MIN_ENERGY);
}


/*
  This function should analyse the signal and decide how critical the
  coding error will be perceptually. The following factors should be
  taken into account:

  -Attacks (positive energy derivative) should be coded with more bits

  -Stationary voiced segments should receive more bits

  -Segments with (very) low absolute energy should receive less bits (maybe
  only shaped noise?)

  -DTX for near-zero energy?

  -Stationary fricative segments should have less bits

  -Temporal masking: when energy slope is decreasing, decrease the bit-rate

  -Decrease bit-rate for males (low pitch)?

  -(wideband only) less bits in the high-band when signal is very
  non-stationary (harder to notice high-frequency noise)???

*/

float vbr_analysis(VBRState *vbr, spx_word16_t *sig, int len, int pitch, float pitch_coef)
{
   int i;
   float ener=0, ener1=0, ener2=0;
   float qual=7;
   float log_energy;
   float non_st=0;
   float voicing;
   float pow_ener;

   for (i=0;i<len>>1;i++)
      ener1 += ((float)sig[i])*sig[i];

   for (i=len>>1;i<len;i++)
      ener2 += ((float)sig[i])*sig[i];
   ener=ener1+ener2;

   log_energy = log(ener+MIN_ENERGY);
   for (i=0;i<VBR_MEMORY_SIZE;i++)
      non_st += sqr(log_energy-vbr->last_log_energy[i]);
   non_st =  non_st/(30*VBR_MEMORY_SIZE);
   if (non_st>1)
      non_st=1;

   voicing = 3*(pitch_coef-.4)*fabs(pitch_coef-.4);
   vbr->average_energy = 0.9*vbr->average_energy + .1*ener;
   vbr->noise_level=vbr->noise_accum/vbr->noise_accum_count;
   pow_ener = pow(ener,NOISE_POW);
   if (vbr->noise_accum_count<.06 && ener>MIN_ENERGY)
      vbr->noise_accum = .05*pow_ener;

   if ((voicing<.3 && non_st < .2 && pow_ener < 1.2*vbr->noise_level)
       || (voicing<.3 && non_st < .05 && pow_ener < 1.5*vbr->noise_level)
       || (voicing<.4 && non_st < .05 && pow_ener < 1.2*vbr->noise_level)
       || (voicing<0 && non_st < .05))
   {
      float tmp;

      vbr->consec_noise++;
      if (pow_ener > 3*vbr->noise_level)
         tmp = 3*vbr->noise_level;
      else
         tmp = pow_ener;
      if (vbr->consec_noise>=4)
      {
         vbr->noise_accum = .95*vbr->noise_accum + .05*tmp;
         vbr->noise_accum_count = .95*vbr->noise_accum_count + .05;
      }
   } else {
      vbr->consec_noise=0;
   }

   if (pow_ener < vbr->noise_level && ener>MIN_ENERGY)
   {
      vbr->noise_accum = .95*vbr->noise_accum + .05*pow_ener;
      vbr->noise_accum_count = .95*vbr->noise_accum_count + .05;
   }

   /* Checking for very low absolute energy */
   if (ener < 30000)
   {
      qual -= .7;
      if (ener < 10000)
         qual-=.7;
      if (ener < 3000)
         qual-=.7;
   } else {
      float short_diff, long_diff;
      short_diff = log((ener+1)/(1+vbr->last_energy));
      long_diff = log((ener+1)/(1+vbr->average_energy));
      /*fprintf (stderr, "%f %f\n", short_diff, long_diff);*/

      if (long_diff<-5)
         long_diff=-5;
      if (long_diff>2)
         long_diff=2;

      if (long_diff>0)
         qual += .6*long_diff;
      if (long_diff<0)
         qual += .5*long_diff;
      if (short_diff>0)
      {
         if (short_diff>5)
            short_diff=5;
         qual += 1*short_diff;
      }
      /* Checking for energy increases */
      if (ener2 > 1.6*ener1)
         qual += .5;
   }
   vbr->last_energy = ener;
   vbr->soft_pitch = .8*vbr->soft_pitch + .2*pitch_coef;
   qual += 2.2*((pitch_coef-.4) + (vbr->soft_pitch-.4));

   if (qual < vbr->last_quality)
      qual = .5*qual + .5*vbr->last_quality;
   if (qual<4)
      qual=4;
   if (qual>10)
      qual=10;

   /*
   if (vbr->consec_noise>=2)
      qual-=1.3;
   if (vbr->consec_noise>=5)
      qual-=1.3;
   if (vbr->consec_noise>=12)
      qual-=1.3;
   */
   if (vbr->consec_noise>=3)
      qual=4;

   if (vbr->consec_noise)
      qual -= 1.0 * (log(3.0 + vbr->consec_noise)-log(3));
   if (qual<0)
      qual=0;

   if (ener<1600000)
   {
      if (vbr->consec_noise>2)
         qual-=0.5*(log(3.0 + vbr->consec_noise)-log(3));
      if (ener<10000&&vbr->consec_noise>2)
         qual-=0.5*(log(3.0 + vbr->consec_noise)-log(3));
      if (qual<0)
         qual=0;
      qual += .3*log(.0001+ener/1600000.0);
   }
   if (qual<-1)
      qual=-1;

   /*printf ("%f %f %f %f\n", qual, voicing, non_st, pow_ener/(.01+vbr->noise_level));*/

   vbr->last_pitch_coef = pitch_coef;
   vbr->last_quality = qual;

   for (i=VBR_MEMORY_SIZE-1;i>0;i--)
      vbr->last_log_energy[i] = vbr->last_log_energy[i-1];
   vbr->last_log_energy[0] = log_energy;

   /*printf ("VBR: %f %f %f %f\n", (float)(log_energy-log(vbr->average_energy+MIN_ENERGY)), non_st, voicing, vbr->noise_level);*/

   return qual;
}

void vbr_destroy(VBRState *vbr)
{
}

#endif /* #ifndef DISABLE_VBR */

Coverage Report

Created: 2025-12-31 06:21

Line	Count	Source
1		/* Copyright (C) 2002 Jean-Marc Valin
2		File: vbr.c
3
4		VBR-related routines
5
6		Redistribution and use in source and binary forms, with or without
7		modification, are permitted provided that the following conditions
8		are met:
9
10		- Redistributions of source code must retain the above copyright
11		notice, this list of conditions and the following disclaimer.
12
13		- Redistributions in binary form must reproduce the above copyright
14		notice, this list of conditions and the following disclaimer in the
15		documentation and/or other materials provided with the distribution.
16
17		- Neither the name of the Xiph.org Foundation nor the names of its
18		contributors may be used to endorse or promote products derived from
19		this software without specific prior written permission.
20
21		THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22		``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23		LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24		A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
25		CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26		EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27		PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28		PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29		LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30		NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31		SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33		*/
34
35		#ifdef HAVE_CONFIG_H
36		#include "config.h"
37		#endif
38
39		#include "vbr.h"
40		#include <math.h>
41
42
43	34.7k	#define sqr(x) ((x)*(x))
44
45	24.0k	#define MIN_ENERGY 6000
46	8.22k	#define NOISE_POW .3
47
48		#ifndef DISABLE_VBR
49
50		const float vbr_nb_thresh[9][11]={
51		{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /* CNG */
52		{ 4.0f, 2.5f, 2.0f, 1.2f, 0.5f,-0.25f, -0.5f, -0.7f, -0.8f, -0.9f, -1.0f}, /* 2 kbps */
53		{10.0f, 6.5f, 5.2f, 4.5f, 3.9f, 3.7f, 3.0f, 2.5f, 2.3f, 1.8f, 1.0f}, /* 6 kbps */
54		{11.0f, 8.8f, 7.5f, 6.5f, 5.0f, 4.2f, 3.9f, 3.9f, 3.5f, 3.0f, 1.0f}, /* 8 kbps */
55		{11.0f, 11.0f, 9.9f, 8.5f, 7.0f, 5.25f, 4.5f, 4.0f, 4.0f, 4.0f, 2.0f}, /* 11 kbps */
56		{11.0f, 11.0f, 11.0f, 11.0f, 9.5f, 9.25f, 8.0f, 7.0f, 5.0f, 4.0f, 3.0f}, /* 15 kbps */
57		{11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 9.5f, 8.5f, 6.2f, 5.2f, 5.0f}, /* 18 kbps */
58		{11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 10.0f, 9.8f, 7.5f}, /* 24 kbps */
59		{ 7.0f, 4.5f, 3.7f, 3.0f, 2.5f, 1.0f, 1.8f, 1.5f, 1.0f, 0.0f, 0.0f} /* 4 kbps */
60		};
61
62
63		const float vbr_hb_thresh[5][11]={
64		{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /* silence */
65		{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /* 2 kbps */
66		{11.0f, 11.0f, 9.5f, 8.5f, 7.5f, 6.0f, 5.0f, 3.9f, 3.0f, 2.0f, 1.0f}, /* 6 kbps */
67		{11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 9.5f, 8.7f, 7.8f, 7.0f, 6.5f, 4.0f}, /* 10 kbps */
68		{11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 11.0f, 9.8f, 7.5f, 5.5f} /* 18 kbps */
69		};
70
71		const float vbr_uhb_thresh[2][11]={
72		{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f}, /* silence */
73		{ 3.9f, 2.5f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, -1.0f} /* 2 kbps */
74		};
75
76		void vbr_init(VBRState *vbr)
77	1.27k	{
78	1.27k	int i;
79
80	1.27k	vbr->average_energy=1600000;
81	1.27k	vbr->last_energy=1;
82	1.27k	vbr->accum_sum=0;
83	1.27k	vbr->soft_pitch=0;
84	1.27k	vbr->last_pitch_coef=0;
85	1.27k	vbr->last_quality=0;
86
87	1.27k	vbr->noise_accum = .05*pow(MIN_ENERGY, NOISE_POW);
88	1.27k	vbr->noise_accum_count=.05;
89	1.27k	vbr->noise_level=vbr->noise_accum/vbr->noise_accum_count;
90	1.27k	vbr->consec_noise=0;
91
92
93	7.62k	for (i=0;i<VBR_MEMORY_SIZE;i++)
94	6.35k	vbr->last_log_energy[i] = log(MIN_ENERGY);
95	1.27k	}
96
97
98		/*
99		This function should analyse the signal and decide how critical the
100		coding error will be perceptually. The following factors should be
101		taken into account:
102
103		-Attacks (positive energy derivative) should be coded with more bits
104
105		-Stationary voiced segments should receive more bits
106
107		-Segments with (very) low absolute energy should receive less bits (maybe
108		only shaped noise?)
109
110		-DTX for near-zero energy?
111
112		-Stationary fricative segments should have less bits
113
114		-Temporal masking: when energy slope is decreasing, decrease the bit-rate
115
116		-Decrease bit-rate for males (low pitch)?
117
118		-(wideband only) less bits in the high-band when signal is very
119		non-stationary (harder to notice high-frequency noise)???
120
121		*/
122
123		float vbr_analysis(VBRState vbr, spx_word16_t sig, int len, int pitch, float pitch_coef)
124	6.94k	{
125	6.94k	int i;
126	6.94k	float ener=0, ener1=0, ener2=0;
127	6.94k	float qual=7;
128	6.94k	float log_energy;
129	6.94k	float non_st=0;
130	6.94k	float voicing;
131	6.94k	float pow_ener;
132
133	562k	for (i=0;i<len>>1;i++)
134	555k	ener1 += ((float)sig[i])*sig[i];
135
136	562k	for (i=len>>1;i<len;i++)
137	555k	ener2 += ((float)sig[i])*sig[i];
138	6.94k	ener=ener1+ener2;
139
140	6.94k	log_energy = log(ener+MIN_ENERGY);
141	41.6k	for (i=0;i<VBR_MEMORY_SIZE;i++)
142	34.7k	non_st += sqr(log_energy-vbr->last_log_energy[i]);
143	6.94k	non_st = non_st/(30*VBR_MEMORY_SIZE);
144	6.94k	if (non_st>1)
145	2.52k	non_st=1;
146
147	6.94k	voicing = 3(pitch_coef-.4)fabs(pitch_coef-.4);
148	6.94k	vbr->average_energy = 0.9vbr->average_energy + .1ener;
149	6.94k	vbr->noise_level=vbr->noise_accum/vbr->noise_accum_count;
150	6.94k	pow_ener = pow(ener,NOISE_POW);
151	6.94k	if (vbr->noise_accum_count<.06 && ener>MIN_ENERGY)
152	1.37k	vbr->noise_accum = .05*pow_ener;
153
154	6.94k	if ((voicing<.3 && non_st < .2 && pow_ener < 1.2*vbr->noise_level)
155	3.88k	\|\| (voicing<.3 && non_st < .05 && pow_ener < 1.5*vbr->noise_level)
156	3.81k	\|\| (voicing<.4 && non_st < .05 && pow_ener < 1.2*vbr->noise_level)
157	3.78k	\|\| (voicing<0 && non_st < .05))
158	3.20k	{
159	3.20k	float tmp;
160
161	3.20k	vbr->consec_noise++;
162	3.20k	if (pow_ener > 3*vbr->noise_level)
163	13	tmp = 3*vbr->noise_level;
164	3.18k	else
165	3.18k	tmp = pow_ener;
166	3.20k	if (vbr->consec_noise>=4)
167	1.29k	{
168	1.29k	vbr->noise_accum = .95vbr->noise_accum + .05tmp;
169	1.29k	vbr->noise_accum_count = .95*vbr->noise_accum_count + .05;
170	1.29k	}
171	3.74k	} else {
172	3.74k	vbr->consec_noise=0;
173	3.74k	}
174
175	6.94k	if (pow_ener < vbr->noise_level && ener>MIN_ENERGY)
176	668	{
177	668	vbr->noise_accum = .95vbr->noise_accum + .05pow_ener;
178	668	vbr->noise_accum_count = .95*vbr->noise_accum_count + .05;
179	668	}
180
181		/* Checking for very low absolute energy */
182	6.94k	if (ener < 30000)
183	5.07k	{
184	5.07k	qual -= .7;
185	5.07k	if (ener < 10000)
186	4.88k	qual-=.7;
187	5.07k	if (ener < 3000)
188	4.73k	qual-=.7;
189	5.07k	} else {
190	1.87k	float short_diff, long_diff;
191	1.87k	short_diff = log((ener+1)/(1+vbr->last_energy));
192	1.87k	long_diff = log((ener+1)/(1+vbr->average_energy));
193		/fprintf (stderr, "%f %f\n", short_diff, long_diff);/
194
195	1.87k	if (long_diff<-5)
196	145	long_diff=-5;
197	1.87k	if (long_diff>2)
198	565	long_diff=2;
199
200	1.87k	if (long_diff>0)
201	1.44k	qual += .6*long_diff;
202	1.87k	if (long_diff<0)
203	431	qual += .5*long_diff;
204	1.87k	if (short_diff>0)
205	1.19k	{
206	1.19k	if (short_diff>5)
207	695	short_diff=5;
208	1.19k	qual += 1*short_diff;
209	1.19k	}
210		/* Checking for energy increases */
211	1.87k	if (ener2 > 1.6*ener1)
212	273	qual += .5;
213	1.87k	}
214	6.94k	vbr->last_energy = ener;
215	6.94k	vbr->soft_pitch = .8vbr->soft_pitch + .2pitch_coef;
216	6.94k	qual += 2.2*((pitch_coef-.4) + (vbr->soft_pitch-.4));
217
218	6.94k	if (qual < vbr->last_quality)
219	1.44k	qual = .5qual + .5vbr->last_quality;
220	6.94k	if (qual<4)
221	3.45k	qual=4;
222	6.94k	if (qual>10)
223	1.43k	qual=10;
224
225		/*
226		if (vbr->consec_noise>=2)
227		qual-=1.3;
228		if (vbr->consec_noise>=5)
229		qual-=1.3;
230		if (vbr->consec_noise>=12)
231		qual-=1.3;
232		*/
233	6.94k	if (vbr->consec_noise>=3)
234	1.85k	qual=4;
235
236	6.94k	if (vbr->consec_noise)
237	3.20k	qual -= 1.0 * (log(3.0 + vbr->consec_noise)-log(3));
238	6.94k	if (qual<0)
239	0	qual=0;
240
241	6.94k	if (ener<1600000)
242	5.32k	{
243	5.32k	if (vbr->consec_noise>2)
244	1.82k	qual-=0.5*(log(3.0 + vbr->consec_noise)-log(3));
245	5.32k	if (ener<10000&&vbr->consec_noise>2)
246	1.77k	qual-=0.5*(log(3.0 + vbr->consec_noise)-log(3));
247	5.32k	if (qual<0)
248	0	qual=0;
249	5.32k	qual += .3*log(.0001+ener/1600000.0);
250	5.32k	}
251	6.94k	if (qual<-1)
252	481	qual=-1;
253
254		/printf ("%f %f %f %f\n", qual, voicing, non_st, pow_ener/(.01+vbr->noise_level));/
255
256	6.94k	vbr->last_pitch_coef = pitch_coef;
257	6.94k	vbr->last_quality = qual;
258
259	34.7k	for (i=VBR_MEMORY_SIZE-1;i>0;i--)
260	27.7k	vbr->last_log_energy[i] = vbr->last_log_energy[i-1];
261	6.94k	vbr->last_log_energy[0] = log_energy;
262
263		/printf ("VBR: %f %f %f %f\n", (float)(log_energy-log(vbr->average_energy+MIN_ENERGY)), non_st, voicing, vbr->noise_level);/
264
265	6.94k	return qual;
266	6.94k	}
267
268		void vbr_destroy(VBRState *vbr)
269	1.27k	{
270	1.27k	}
271
272		#endif /* #ifndef DISABLE_VBR */