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Diffstat (limited to 'media/libstagefright/codecs/amrwbenc/src/wb_vad.c')
-rw-r--r--media/libstagefright/codecs/amrwbenc/src/wb_vad.c166
1 files changed, 83 insertions, 83 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/src/wb_vad.c b/media/libstagefright/codecs/amrwbenc/src/wb_vad.c
index 7e1d673..13dd2aa 100644
--- a/media/libstagefright/codecs/amrwbenc/src/wb_vad.c
+++ b/media/libstagefright/codecs/amrwbenc/src/wb_vad.c
@@ -52,7 +52,7 @@ static Word16 ilog2( /* return: output value of the log2 *
if (mant <= 0)
{
- mant = 1;
+ mant = 1;
}
ex = norm_s(mant);
mant = mant << ex;
@@ -88,14 +88,14 @@ static void filter5(
temp0 = vo_sub(*in0, vo_mult(COEFF5_1, data[0]));
temp1 = add1(data[0], vo_mult(COEFF5_1, temp0));
- data[0] = temp0;
+ data[0] = temp0;
temp0 = vo_sub(*in1, vo_mult(COEFF5_2, data[1]));
temp2 = add1(data[1], vo_mult(COEFF5_2, temp0));
- data[1] = temp0;
+ data[1] = temp0;
- *in0 = extract_h((vo_L_add(temp1, temp2) << 15));
- *in1 = extract_h((vo_L_sub(temp1, temp2) << 15));
+ *in0 = extract_h((vo_L_add(temp1, temp2) << 15));
+ *in1 = extract_h((vo_L_sub(temp1, temp2) << 15));
}
/******************************************************************************
@@ -116,10 +116,10 @@ static void filter3(
temp1 = vo_sub(*in1, vo_mult(COEFF3, *data));
temp2 = add1(*data, vo_mult(COEFF3, temp1));
- *data = temp1;
+ *data = temp1;
- *in1 = extract_h((vo_L_sub(*in0, temp2) << 15));
- *in0 = extract_h((vo_L_add(*in0, temp2) << 15));
+ *in1 = extract_h((vo_L_sub(*in0, temp2) << 15));
+ *in0 = extract_h((vo_L_add(*in0, temp2) << 15));
}
/******************************************************************************
@@ -149,14 +149,14 @@ static Word16 level_calculation( /* return: signal level */
Word32 i, l_temp1, l_temp2;
Word16 level;
- l_temp1 = 0L;
+ l_temp1 = 0L;
for (i = count1; i < count2; i++)
{
l_temp1 += (abs_s(data[ind_m * i + ind_a])<<1);
}
l_temp2 = vo_L_add(l_temp1, L_shl(*sub_level, 16 - scale));
- *sub_level = extract_h(L_shl(l_temp1, scale));
+ *sub_level = extract_h(L_shl(l_temp1, scale));
for (i = 0; i < count1; i++)
{
@@ -187,7 +187,7 @@ static void filter_bank(
/* shift input 1 bit down for safe scaling */
for (i = 0; i < FRAME_LEN; i++)
{
- tmp_buf[i] = in[i] >> 1;
+ tmp_buf[i] = in[i] >> 1;
}
/* run the filter bank */
@@ -222,29 +222,29 @@ static void filter_bank(
/* calculate levels in each frequency band */
/* 4800 - 6400 Hz */
- level[11] = level_calculation(tmp_buf, &st->sub_level[11], 16, 64, 4, 1, 14);
+ level[11] = level_calculation(tmp_buf, &st->sub_level[11], 16, 64, 4, 1, 14);
/* 4000 - 4800 Hz */
- level[10] = level_calculation(tmp_buf, &st->sub_level[10], 8, 32, 8, 7, 15);
+ level[10] = level_calculation(tmp_buf, &st->sub_level[10], 8, 32, 8, 7, 15);
/* 3200 - 4000 Hz */
- level[9] = level_calculation(tmp_buf, &st->sub_level[9],8, 32, 8, 3, 15);
+ level[9] = level_calculation(tmp_buf, &st->sub_level[9],8, 32, 8, 3, 15);
/* 2400 - 3200 Hz */
- level[8] = level_calculation(tmp_buf, &st->sub_level[8],8, 32, 8, 2, 15);
+ level[8] = level_calculation(tmp_buf, &st->sub_level[8],8, 32, 8, 2, 15);
/* 2000 - 2400 Hz */
- level[7] = level_calculation(tmp_buf, &st->sub_level[7],4, 16, 16, 14, 16);
+ level[7] = level_calculation(tmp_buf, &st->sub_level[7],4, 16, 16, 14, 16);
/* 1600 - 2000 Hz */
- level[6] = level_calculation(tmp_buf, &st->sub_level[6],4, 16, 16, 6, 16);
+ level[6] = level_calculation(tmp_buf, &st->sub_level[6],4, 16, 16, 6, 16);
/* 1200 - 1600 Hz */
- level[5] = level_calculation(tmp_buf, &st->sub_level[5],4, 16, 16, 4, 16);
+ level[5] = level_calculation(tmp_buf, &st->sub_level[5],4, 16, 16, 4, 16);
/* 800 - 1200 Hz */
- level[4] = level_calculation(tmp_buf, &st->sub_level[4],4, 16, 16, 12, 16);
+ level[4] = level_calculation(tmp_buf, &st->sub_level[4],4, 16, 16, 12, 16);
/* 600 - 800 Hz */
- level[3] = level_calculation(tmp_buf, &st->sub_level[3],2, 8, 32, 8, 17);
+ level[3] = level_calculation(tmp_buf, &st->sub_level[3],2, 8, 32, 8, 17);
/* 400 - 600 Hz */
- level[2] = level_calculation(tmp_buf, &st->sub_level[2],2, 8, 32, 24, 17);
+ level[2] = level_calculation(tmp_buf, &st->sub_level[2],2, 8, 32, 24, 17);
/* 200 - 400 Hz */
- level[1] = level_calculation(tmp_buf, &st->sub_level[1],2, 8, 32, 16, 17);
+ level[1] = level_calculation(tmp_buf, &st->sub_level[1],2, 8, 32, 16, 17);
/* 0 - 200 Hz */
- level[0] = level_calculation(tmp_buf, &st->sub_level[0],2, 8, 32, 0, 17);
+ level[0] = level_calculation(tmp_buf, &st->sub_level[0],2, 8, 32, 0, 17);
}
/******************************************************************************
@@ -266,31 +266,31 @@ static void update_cntrl(
/* if a tone has been detected for a while, initialize stat_count */
if (sub((Word16) (st->tone_flag & 0x7c00), 0x7c00) == 0)
{
- st->stat_count = STAT_COUNT;
+ st->stat_count = STAT_COUNT;
} else
{
/* if 8 last vad-decisions have been "0", reinitialize stat_count */
if ((st->vadreg & 0x7f80) == 0)
{
- st->stat_count = STAT_COUNT;
+ st->stat_count = STAT_COUNT;
} else
{
- stat_rat = 0;
+ stat_rat = 0;
for (i = 0; i < COMPLEN; i++)
{
if(level[i] > st->ave_level[i])
{
- num = level[i];
- denom = st->ave_level[i];
+ num = level[i];
+ denom = st->ave_level[i];
} else
{
num = st->ave_level[i];
- denom = level[i];
+ denom = level[i];
}
/* Limit nimimum value of num and denom to STAT_THR_LEVEL */
if(num < STAT_THR_LEVEL)
{
- num = STAT_THR_LEVEL;
+ num = STAT_THR_LEVEL;
}
if(denom < STAT_THR_LEVEL)
{
@@ -307,7 +307,7 @@ static void update_cntrl(
/* compare stat_rat with a threshold and update stat_count */
if(stat_rat > STAT_THR)
{
- st->stat_count = STAT_COUNT;
+ st->stat_count = STAT_COUNT;
} else
{
if ((st->vadreg & 0x4000) != 0)
@@ -315,7 +315,7 @@ static void update_cntrl(
if (st->stat_count != 0)
{
- st->stat_count = st->stat_count - 1;
+ st->stat_count = st->stat_count - 1;
}
}
}
@@ -323,17 +323,17 @@ static void update_cntrl(
}
/* Update average amplitude estimate for stationarity estimation */
- alpha = ALPHA4;
+ alpha = ALPHA4;
if(st->stat_count == STAT_COUNT)
{
- alpha = 32767;
+ alpha = 32767;
} else if ((st->vadreg & 0x4000) == 0)
{
- alpha = ALPHA5;
+ alpha = ALPHA5;
}
for (i = 0; i < COMPLEN; i++)
{
- st->ave_level[i] = add1(st->ave_level[i], vo_mult_r(alpha, vo_sub(level[i], st->ave_level[i])));
+ st->ave_level[i] = add1(st->ave_level[i], vo_mult_r(alpha, vo_sub(level[i], st->ave_level[i])));
}
}
@@ -354,25 +354,25 @@ static Word16 hangover_addition( /* return: VAD_flag indica
/* if the input power (pow_sum) is lower than a threshold, clear counters and set VAD_flag to "0" */
if (low_power != 0)
{
- st->burst_count = 0;
- st->hang_count = 0;
+ st->burst_count = 0;
+ st->hang_count = 0;
return 0;
}
/* update the counters (hang_count, burst_count) */
if ((st->vadreg & 0x4000) != 0)
{
- st->burst_count = st->burst_count + 1;
+ st->burst_count = st->burst_count + 1;
if(st->burst_count >= burst_len)
{
- st->hang_count = hang_len;
+ st->hang_count = hang_len;
}
return 1;
} else
{
- st->burst_count = 0;
+ st->burst_count = 0;
if (st->hang_count > 0)
{
- st->hang_count = st->hang_count - 1;
+ st->hang_count = st->hang_count - 1;
return 1;
}
}
@@ -391,7 +391,7 @@ static void noise_estimate_update(
Word16 level[] /* i : sub-band levels of the input frame */
)
{
- Word32 i;
+ Word32 i;
Word16 alpha_up, alpha_down, bckr_add = 2;
/* Control update of bckr_est[] */
@@ -400,19 +400,19 @@ static void noise_estimate_update(
/* Choose update speed */
if ((0x7800 & st->vadreg) == 0)
{
- alpha_up = ALPHA_UP1;
- alpha_down = ALPHA_DOWN1;
+ alpha_up = ALPHA_UP1;
+ alpha_down = ALPHA_DOWN1;
} else
{
if ((st->stat_count == 0))
{
- alpha_up = ALPHA_UP2;
- alpha_down = ALPHA_DOWN2;
+ alpha_up = ALPHA_UP2;
+ alpha_down = ALPHA_DOWN2;
} else
{
- alpha_up = 0;
- alpha_down = ALPHA3;
- bckr_add = 0;
+ alpha_up = 0;
+ alpha_down = ALPHA3;
+ bckr_add = 0;
}
}
@@ -424,20 +424,20 @@ static void noise_estimate_update(
if (temp < 0)
{ /* update downwards */
- st->bckr_est[i] = add1(-2, add(st->bckr_est[i],vo_mult_r(alpha_down, temp)));
+ st->bckr_est[i] = add1(-2, add(st->bckr_est[i],vo_mult_r(alpha_down, temp)));
/* limit minimum value of the noise estimate to NOISE_MIN */
if(st->bckr_est[i] < NOISE_MIN)
{
- st->bckr_est[i] = NOISE_MIN;
+ st->bckr_est[i] = NOISE_MIN;
}
} else
{ /* update upwards */
- st->bckr_est[i] = add1(bckr_add, add1(st->bckr_est[i],vo_mult_r(alpha_up, temp)));
+ st->bckr_est[i] = add1(bckr_add, add1(st->bckr_est[i],vo_mult_r(alpha_up, temp)));
/* limit maximum value of the noise estimate to NOISE_MAX */
if(st->bckr_est[i] > NOISE_MAX)
{
- st->bckr_est[i] = NOISE_MAX;
+ st->bckr_est[i] = NOISE_MAX;
}
}
}
@@ -445,7 +445,7 @@ static void noise_estimate_update(
/* Update signal levels of the previous frame (old_level) */
for (i = 0; i < COMPLEN; i++)
{
- st->old_level[i] = level[i];
+ st->old_level[i] = level[i];
}
}
@@ -473,7 +473,7 @@ static Word16 vad_decision( /* return value : VAD_flag
/* Calculate squared sum of the input levels (level) divided by the background noise components
* (bckr_est). */
- L_snr_sum = 0;
+ L_snr_sum = 0;
for (i = 0; i < COMPLEN; i++)
{
Word16 exp;
@@ -486,7 +486,7 @@ static Word16 vad_decision( /* return value : VAD_flag
}
/* Calculate average level of estimated background noise */
- L_temp = 0;
+ L_temp = 0;
for (i = 1; i < COMPLEN; i++) /* ignore lowest band */
{
L_temp = vo_L_add(L_temp, st->bckr_est[i]);
@@ -498,7 +498,7 @@ static Word16 vad_decision( /* return value : VAD_flag
if(st->speech_level < temp)
{
- st->speech_level = temp;
+ st->speech_level = temp;
}
ilog2_noise_level = ilog2(noise_level);
@@ -511,33 +511,33 @@ static Word16 vad_decision( /* return value : VAD_flag
temp2 = add1(SP_CH_MIN, vo_mult(SP_SLOPE, (ilog2_speech_level - SP_P1)));
if (temp2 < SP_CH_MIN)
{
- temp2 = SP_CH_MIN;
+ temp2 = SP_CH_MIN;
}
if (temp2 > SP_CH_MAX)
{
- temp2 = SP_CH_MAX;
+ temp2 = SP_CH_MAX;
}
vad_thr = temp + temp2;
if(vad_thr < THR_MIN)
{
- vad_thr = THR_MIN;
+ vad_thr = THR_MIN;
}
/* Shift VAD decision register */
- st->vadreg = (st->vadreg >> 1);
+ st->vadreg = (st->vadreg >> 1);
/* Make intermediate VAD decision */
if(L_snr_sum > vo_L_mult(vad_thr, (512 * COMPLEN)))
{
- st->vadreg = (Word16) (st->vadreg | 0x4000);
+ st->vadreg = (Word16) (st->vadreg | 0x4000);
}
/* check if the input power (pow_sum) is lower than a threshold" */
if(pow_sum < VAD_POW_LOW)
{
- low_power_flag = 1;
+ low_power_flag = 1;
} else
{
- low_power_flag = 0;
+ low_power_flag = 0;
}
/* Update background noise estimates */
noise_estimate_update(st, level);
@@ -546,7 +546,7 @@ static Word16 vad_decision( /* return value : VAD_flag
hang_len = add1(vo_mult(HANG_SLOPE, (vad_thr - HANG_P1)), HANG_HIGH);
if(hang_len < HANG_LOW)
{
- hang_len = HANG_LOW;
+ hang_len = HANG_LOW;
}
burst_len = add1(vo_mult(BURST_SLOPE, (vad_thr - BURST_P1)), BURST_HIGH);
@@ -575,20 +575,20 @@ static void Estimate_Speech(
/* if the required activity count cannot be achieved, reset counters */
if((st->sp_est_cnt - st->sp_max_cnt) > (SP_EST_COUNT - SP_ACTIVITY_COUNT))
{
- st->sp_est_cnt = 0;
- st->sp_max = 0;
- st->sp_max_cnt = 0;
+ st->sp_est_cnt = 0;
+ st->sp_max = 0;
+ st->sp_max_cnt = 0;
}
- st->sp_est_cnt += 1;
+ st->sp_est_cnt += 1;
if (((st->vadreg & 0x4000)||(in_level > st->speech_level)) && (in_level > MIN_SPEECH_LEVEL1))
{
/* update sp_max */
if(in_level > st->sp_max)
{
- st->sp_max = in_level;
+ st->sp_max = in_level;
}
- st->sp_max_cnt += 1;
+ st->sp_max_cnt += 1;
if(st->sp_max_cnt >= SP_ACTIVITY_COUNT)
{
@@ -599,19 +599,19 @@ static void Estimate_Speech(
/* select update speed */
if(tmp > st->speech_level)
{
- alpha = ALPHA_SP_UP;
+ alpha = ALPHA_SP_UP;
} else
{
- alpha = ALPHA_SP_DOWN;
+ alpha = ALPHA_SP_DOWN;
}
if(tmp > MIN_SPEECH_LEVEL2)
{
- st->speech_level = add1(st->speech_level, vo_mult_r(alpha, vo_sub(tmp, st->speech_level)));
+ st->speech_level = add1(st->speech_level, vo_mult_r(alpha, vo_sub(tmp, st->speech_level)));
}
/* clear all counters used for speech estimation */
- st->sp_max = 0;
- st->sp_max_cnt = 0;
- st->sp_est_cnt = 0;
+ st->sp_max = 0;
+ st->sp_max_cnt = 0;
+ st->sp_est_cnt = 0;
}
}
}
@@ -767,22 +767,22 @@ Word16 wb_vad( /* Return value : VAD Decision, 1
Word32 L_temp, pow_sum;
/* Calculate power of the input frame. */
- L_temp = 0L;
+ L_temp = 0L;
for (i = 0; i < FRAME_LEN; i++)
{
L_temp = L_mac(L_temp, in_buf[i], in_buf[i]);
}
/* pow_sum = power of current frame and previous frame */
- pow_sum = L_add(L_temp, st->prev_pow_sum);
+ pow_sum = L_add(L_temp, st->prev_pow_sum);
/* save power of current frame for next call */
- st->prev_pow_sum = L_temp;
+ st->prev_pow_sum = L_temp;
/* If input power is very low, clear tone flag */
if (pow_sum < POW_TONE_THR)
{
- st->tone_flag = (Word16) (st->tone_flag & 0x1fff);
+ st->tone_flag = (Word16) (st->tone_flag & 0x1fff);
}
/* Run the filter bank and calculate signal levels at each band */
filter_bank(st, in_buf, level);
@@ -791,7 +791,7 @@ Word16 wb_vad( /* Return value : VAD Decision, 1
VAD_flag = vad_decision(st, level, pow_sum);
/* Calculate input level */
- L_temp = 0;
+ L_temp = 0;
for (i = 1; i < COMPLEN; i++) /* ignore lowest band */
{
L_temp = vo_L_add(L_temp, level[i]);
generated by cgit v1.1 at 2024-05-28 10:37:11 +0000