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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h b/lib/rbcodec/codecs/libopus/silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h new file mode 100644 index 0000000000..3999b5bd09 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h | |||
@@ -0,0 +1,336 @@ | |||
1 | /*********************************************************************** | ||
2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. | ||
3 | Redistribution and use in source and binary forms, with or without | ||
4 | modification, are permitted provided that the following conditions | ||
5 | are met: | ||
6 | - Redistributions of source code must retain the above copyright notice, | ||
7 | this list of conditions and the following disclaimer. | ||
8 | - Redistributions in binary form must reproduce the above copyright | ||
9 | notice, this list of conditions and the following disclaimer in the | ||
10 | documentation and/or other materials provided with the distribution. | ||
11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the | ||
12 | names of specific contributors, may be used to endorse or promote | ||
13 | products derived from this software without specific prior written | ||
14 | permission. | ||
15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
25 | POSSIBILITY OF SUCH DAMAGE. | ||
26 | ***********************************************************************/ | ||
27 | |||
28 | |||
29 | /**************************************************************/ | ||
30 | /* Compute noise shaping coefficients and initial gain values */ | ||
31 | /**************************************************************/ | ||
32 | #define OVERRIDE_silk_noise_shape_analysis_FIX | ||
33 | |||
34 | void silk_noise_shape_analysis_FIX( | ||
35 | silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */ | ||
36 | silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */ | ||
37 | const opus_int16 *pitch_res, /* I LPC residual from pitch analysis */ | ||
38 | const opus_int16 *x, /* I Input signal [ frame_length + la_shape ] */ | ||
39 | int arch /* I Run-time architecture */ | ||
40 | ) | ||
41 | { | ||
42 | silk_shape_state_FIX *psShapeSt = &psEnc->sShape; | ||
43 | opus_int k, i, nSamples, Qnrg, b_Q14, warping_Q16, scale = 0; | ||
44 | opus_int32 SNR_adj_dB_Q7, HarmBoost_Q16, HarmShapeGain_Q16, Tilt_Q16, tmp32; | ||
45 | opus_int32 nrg, pre_nrg_Q30, log_energy_Q7, log_energy_prev_Q7, energy_variation_Q7; | ||
46 | opus_int32 delta_Q16, BWExp1_Q16, BWExp2_Q16, gain_mult_Q16, gain_add_Q16, strength_Q16, b_Q8; | ||
47 | opus_int32 auto_corr[ MAX_SHAPE_LPC_ORDER + 1 ]; | ||
48 | opus_int32 refl_coef_Q16[ MAX_SHAPE_LPC_ORDER ]; | ||
49 | opus_int32 AR1_Q24[ MAX_SHAPE_LPC_ORDER ]; | ||
50 | opus_int32 AR2_Q24[ MAX_SHAPE_LPC_ORDER ]; | ||
51 | VARDECL( opus_int16, x_windowed ); | ||
52 | const opus_int16 *x_ptr, *pitch_res_ptr; | ||
53 | SAVE_STACK; | ||
54 | |||
55 | /* Point to start of first LPC analysis block */ | ||
56 | x_ptr = x - psEnc->sCmn.la_shape; | ||
57 | |||
58 | /****************/ | ||
59 | /* GAIN CONTROL */ | ||
60 | /****************/ | ||
61 | SNR_adj_dB_Q7 = psEnc->sCmn.SNR_dB_Q7; | ||
62 | |||
63 | /* Input quality is the average of the quality in the lowest two VAD bands */ | ||
64 | psEncCtrl->input_quality_Q14 = ( opus_int )silk_RSHIFT( (opus_int32)psEnc->sCmn.input_quality_bands_Q15[ 0 ] | ||
65 | + psEnc->sCmn.input_quality_bands_Q15[ 1 ], 2 ); | ||
66 | |||
67 | /* Coding quality level, between 0.0_Q0 and 1.0_Q0, but in Q14 */ | ||
68 | psEncCtrl->coding_quality_Q14 = silk_RSHIFT( silk_sigm_Q15( silk_RSHIFT_ROUND( SNR_adj_dB_Q7 - | ||
69 | SILK_FIX_CONST( 20.0, 7 ), 4 ) ), 1 ); | ||
70 | |||
71 | /* Reduce coding SNR during low speech activity */ | ||
72 | if( psEnc->sCmn.useCBR == 0 ) { | ||
73 | b_Q8 = SILK_FIX_CONST( 1.0, 8 ) - psEnc->sCmn.speech_activity_Q8; | ||
74 | b_Q8 = silk_SMULWB( silk_LSHIFT( b_Q8, 8 ), b_Q8 ); | ||
75 | SNR_adj_dB_Q7 = silk_SMLAWB( SNR_adj_dB_Q7, | ||
76 | silk_SMULBB( SILK_FIX_CONST( -BG_SNR_DECR_dB, 7 ) >> ( 4 + 1 ), b_Q8 ), /* Q11*/ | ||
77 | silk_SMULWB( SILK_FIX_CONST( 1.0, 14 ) + psEncCtrl->input_quality_Q14, psEncCtrl->coding_quality_Q14 ) ); /* Q12*/ | ||
78 | } | ||
79 | |||
80 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
81 | /* Reduce gains for periodic signals */ | ||
82 | SNR_adj_dB_Q7 = silk_SMLAWB( SNR_adj_dB_Q7, SILK_FIX_CONST( HARM_SNR_INCR_dB, 8 ), psEnc->LTPCorr_Q15 ); | ||
83 | } else { | ||
84 | /* For unvoiced signals and low-quality input, adjust the quality slower than SNR_dB setting */ | ||
85 | SNR_adj_dB_Q7 = silk_SMLAWB( SNR_adj_dB_Q7, | ||
86 | silk_SMLAWB( SILK_FIX_CONST( 6.0, 9 ), -SILK_FIX_CONST( 0.4, 18 ), psEnc->sCmn.SNR_dB_Q7 ), | ||
87 | SILK_FIX_CONST( 1.0, 14 ) - psEncCtrl->input_quality_Q14 ); | ||
88 | } | ||
89 | |||
90 | /*************************/ | ||
91 | /* SPARSENESS PROCESSING */ | ||
92 | /*************************/ | ||
93 | /* Set quantizer offset */ | ||
94 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
95 | /* Initially set to 0; may be overruled in process_gains(..) */ | ||
96 | psEnc->sCmn.indices.quantOffsetType = 0; | ||
97 | psEncCtrl->sparseness_Q8 = 0; | ||
98 | } else { | ||
99 | /* Sparseness measure, based on relative fluctuations of energy per 2 milliseconds */ | ||
100 | nSamples = silk_LSHIFT( psEnc->sCmn.fs_kHz, 1 ); | ||
101 | energy_variation_Q7 = 0; | ||
102 | log_energy_prev_Q7 = 0; | ||
103 | pitch_res_ptr = pitch_res; | ||
104 | for( k = 0; k < silk_SMULBB( SUB_FRAME_LENGTH_MS, psEnc->sCmn.nb_subfr ) / 2; k++ ) { | ||
105 | silk_sum_sqr_shift( &nrg, &scale, pitch_res_ptr, nSamples ); | ||
106 | nrg += silk_RSHIFT( nSamples, scale ); /* Q(-scale)*/ | ||
107 | |||
108 | log_energy_Q7 = silk_lin2log( nrg ); | ||
109 | if( k > 0 ) { | ||
110 | energy_variation_Q7 += silk_abs( log_energy_Q7 - log_energy_prev_Q7 ); | ||
111 | } | ||
112 | log_energy_prev_Q7 = log_energy_Q7; | ||
113 | pitch_res_ptr += nSamples; | ||
114 | } | ||
115 | |||
116 | psEncCtrl->sparseness_Q8 = silk_RSHIFT( silk_sigm_Q15( silk_SMULWB( energy_variation_Q7 - | ||
117 | SILK_FIX_CONST( 5.0, 7 ), SILK_FIX_CONST( 0.1, 16 ) ) ), 7 ); | ||
118 | |||
119 | /* Set quantization offset depending on sparseness measure */ | ||
120 | if( psEncCtrl->sparseness_Q8 > SILK_FIX_CONST( SPARSENESS_THRESHOLD_QNT_OFFSET, 8 ) ) { | ||
121 | psEnc->sCmn.indices.quantOffsetType = 0; | ||
122 | } else { | ||
123 | psEnc->sCmn.indices.quantOffsetType = 1; | ||
124 | } | ||
125 | |||
126 | /* Increase coding SNR for sparse signals */ | ||
127 | SNR_adj_dB_Q7 = silk_SMLAWB( SNR_adj_dB_Q7, SILK_FIX_CONST( SPARSE_SNR_INCR_dB, 15 ), psEncCtrl->sparseness_Q8 - SILK_FIX_CONST( 0.5, 8 ) ); | ||
128 | } | ||
129 | |||
130 | /*******************************/ | ||
131 | /* Control bandwidth expansion */ | ||
132 | /*******************************/ | ||
133 | /* More BWE for signals with high prediction gain */ | ||
134 | strength_Q16 = silk_SMULWB( psEncCtrl->predGain_Q16, SILK_FIX_CONST( FIND_PITCH_WHITE_NOISE_FRACTION, 16 ) ); | ||
135 | BWExp1_Q16 = BWExp2_Q16 = silk_DIV32_varQ( SILK_FIX_CONST( BANDWIDTH_EXPANSION, 16 ), | ||
136 | silk_SMLAWW( SILK_FIX_CONST( 1.0, 16 ), strength_Q16, strength_Q16 ), 16 ); | ||
137 | delta_Q16 = silk_SMULWB( SILK_FIX_CONST( 1.0, 16 ) - silk_SMULBB( 3, psEncCtrl->coding_quality_Q14 ), | ||
138 | SILK_FIX_CONST( LOW_RATE_BANDWIDTH_EXPANSION_DELTA, 16 ) ); | ||
139 | BWExp1_Q16 = silk_SUB32( BWExp1_Q16, delta_Q16 ); | ||
140 | BWExp2_Q16 = silk_ADD32( BWExp2_Q16, delta_Q16 ); | ||
141 | /* BWExp1 will be applied after BWExp2, so make it relative */ | ||
142 | BWExp1_Q16 = silk_DIV32_16( silk_LSHIFT( BWExp1_Q16, 14 ), silk_RSHIFT( BWExp2_Q16, 2 ) ); | ||
143 | |||
144 | if( psEnc->sCmn.warping_Q16 > 0 ) { | ||
145 | /* Slightly more warping in analysis will move quantization noise up in frequency, where it's better masked */ | ||
146 | warping_Q16 = silk_SMLAWB( psEnc->sCmn.warping_Q16, (opus_int32)psEncCtrl->coding_quality_Q14, SILK_FIX_CONST( 0.01, 18 ) ); | ||
147 | } else { | ||
148 | warping_Q16 = 0; | ||
149 | } | ||
150 | |||
151 | /********************************************/ | ||
152 | /* Compute noise shaping AR coefs and gains */ | ||
153 | /********************************************/ | ||
154 | ALLOC( x_windowed, psEnc->sCmn.shapeWinLength, opus_int16 ); | ||
155 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
156 | /* Apply window: sine slope followed by flat part followed by cosine slope */ | ||
157 | opus_int shift, slope_part, flat_part; | ||
158 | flat_part = psEnc->sCmn.fs_kHz * 3; | ||
159 | slope_part = silk_RSHIFT( psEnc->sCmn.shapeWinLength - flat_part, 1 ); | ||
160 | |||
161 | silk_apply_sine_window( x_windowed, x_ptr, 1, slope_part ); | ||
162 | shift = slope_part; | ||
163 | silk_memcpy( x_windowed + shift, x_ptr + shift, flat_part * sizeof(opus_int16) ); | ||
164 | shift += flat_part; | ||
165 | silk_apply_sine_window( x_windowed + shift, x_ptr + shift, 2, slope_part ); | ||
166 | |||
167 | /* Update pointer: next LPC analysis block */ | ||
168 | x_ptr += psEnc->sCmn.subfr_length; | ||
169 | |||
170 | if( psEnc->sCmn.warping_Q16 > 0 ) { | ||
171 | /* Calculate warped auto correlation */ | ||
172 | silk_warped_autocorrelation_FIX( auto_corr, &scale, x_windowed, warping_Q16, psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder, arch ); | ||
173 | } else { | ||
174 | /* Calculate regular auto correlation */ | ||
175 | silk_autocorr( auto_corr, &scale, x_windowed, psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder + 1, arch ); | ||
176 | } | ||
177 | |||
178 | /* Add white noise, as a fraction of energy */ | ||
179 | auto_corr[0] = silk_ADD32( auto_corr[0], silk_max_32( silk_SMULWB( silk_RSHIFT( auto_corr[ 0 ], 4 ), | ||
180 | SILK_FIX_CONST( SHAPE_WHITE_NOISE_FRACTION, 20 ) ), 1 ) ); | ||
181 | |||
182 | /* Calculate the reflection coefficients using schur */ | ||
183 | nrg = silk_schur64( refl_coef_Q16, auto_corr, psEnc->sCmn.shapingLPCOrder ); | ||
184 | silk_assert( nrg >= 0 ); | ||
185 | |||
186 | /* Convert reflection coefficients to prediction coefficients */ | ||
187 | silk_k2a_Q16( AR2_Q24, refl_coef_Q16, psEnc->sCmn.shapingLPCOrder ); | ||
188 | |||
189 | Qnrg = -scale; /* range: -12...30*/ | ||
190 | silk_assert( Qnrg >= -12 ); | ||
191 | silk_assert( Qnrg <= 30 ); | ||
192 | |||
193 | /* Make sure that Qnrg is an even number */ | ||
194 | if( Qnrg & 1 ) { | ||
195 | Qnrg -= 1; | ||
196 | nrg >>= 1; | ||
197 | } | ||
198 | |||
199 | tmp32 = silk_SQRT_APPROX( nrg ); | ||
200 | Qnrg >>= 1; /* range: -6...15*/ | ||
201 | |||
202 | psEncCtrl->Gains_Q16[ k ] = (silk_LSHIFT32( silk_LIMIT( (tmp32), silk_RSHIFT32( silk_int32_MIN, (16 - Qnrg) ), \ | ||
203 | silk_RSHIFT32( silk_int32_MAX, (16 - Qnrg) ) ), (16 - Qnrg) )); | ||
204 | |||
205 | if( psEnc->sCmn.warping_Q16 > 0 ) { | ||
206 | /* Adjust gain for warping */ | ||
207 | gain_mult_Q16 = warped_gain( AR2_Q24, warping_Q16, psEnc->sCmn.shapingLPCOrder ); | ||
208 | silk_assert( psEncCtrl->Gains_Q16[ k ] >= 0 ); | ||
209 | if ( silk_SMULWW( silk_RSHIFT_ROUND( psEncCtrl->Gains_Q16[ k ], 1 ), gain_mult_Q16 ) >= ( silk_int32_MAX >> 1 ) ) { | ||
210 | psEncCtrl->Gains_Q16[ k ] = silk_int32_MAX; | ||
211 | } else { | ||
212 | psEncCtrl->Gains_Q16[ k ] = silk_SMULWW( psEncCtrl->Gains_Q16[ k ], gain_mult_Q16 ); | ||
213 | } | ||
214 | } | ||
215 | |||
216 | /* Bandwidth expansion for synthesis filter shaping */ | ||
217 | silk_bwexpander_32( AR2_Q24, psEnc->sCmn.shapingLPCOrder, BWExp2_Q16 ); | ||
218 | |||
219 | /* Compute noise shaping filter coefficients */ | ||
220 | silk_memcpy( AR1_Q24, AR2_Q24, psEnc->sCmn.shapingLPCOrder * sizeof( opus_int32 ) ); | ||
221 | |||
222 | /* Bandwidth expansion for analysis filter shaping */ | ||
223 | silk_assert( BWExp1_Q16 <= SILK_FIX_CONST( 1.0, 16 ) ); | ||
224 | silk_bwexpander_32( AR1_Q24, psEnc->sCmn.shapingLPCOrder, BWExp1_Q16 ); | ||
225 | |||
226 | /* Ratio of prediction gains, in energy domain */ | ||
227 | pre_nrg_Q30 = silk_LPC_inverse_pred_gain_Q24( AR2_Q24, psEnc->sCmn.shapingLPCOrder, arch ); | ||
228 | nrg = silk_LPC_inverse_pred_gain_Q24( AR1_Q24, psEnc->sCmn.shapingLPCOrder, arch ); | ||
229 | |||
230 | /*psEncCtrl->GainsPre[ k ] = 1.0f - 0.7f * ( 1.0f - pre_nrg / nrg ) = 0.3f + 0.7f * pre_nrg / nrg;*/ | ||
231 | pre_nrg_Q30 = silk_LSHIFT32( silk_SMULWB( pre_nrg_Q30, SILK_FIX_CONST( 0.7, 15 ) ), 1 ); | ||
232 | psEncCtrl->GainsPre_Q14[ k ] = ( opus_int ) SILK_FIX_CONST( 0.3, 14 ) + silk_DIV32_varQ( pre_nrg_Q30, nrg, 14 ); | ||
233 | |||
234 | /* Convert to monic warped prediction coefficients and limit absolute values */ | ||
235 | limit_warped_coefs( AR2_Q24, AR1_Q24, warping_Q16, SILK_FIX_CONST( 3.999, 24 ), psEnc->sCmn.shapingLPCOrder ); | ||
236 | |||
237 | /* Convert from Q24 to Q13 and store in int16 */ | ||
238 | for( i = 0; i < psEnc->sCmn.shapingLPCOrder; i++ ) { | ||
239 | psEncCtrl->AR1_Q13[ k * MAX_SHAPE_LPC_ORDER + i ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( AR1_Q24[ i ], 11 ) ); | ||
240 | psEncCtrl->AR2_Q13[ k * MAX_SHAPE_LPC_ORDER + i ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( AR2_Q24[ i ], 11 ) ); | ||
241 | } | ||
242 | } | ||
243 | |||
244 | /*****************/ | ||
245 | /* Gain tweaking */ | ||
246 | /*****************/ | ||
247 | /* Increase gains during low speech activity and put lower limit on gains */ | ||
248 | gain_mult_Q16 = silk_log2lin( -silk_SMLAWB( -SILK_FIX_CONST( 16.0, 7 ), SNR_adj_dB_Q7, SILK_FIX_CONST( 0.16, 16 ) ) ); | ||
249 | gain_add_Q16 = silk_log2lin( silk_SMLAWB( SILK_FIX_CONST( 16.0, 7 ), SILK_FIX_CONST( MIN_QGAIN_DB, 7 ), SILK_FIX_CONST( 0.16, 16 ) ) ); | ||
250 | silk_assert( gain_mult_Q16 > 0 ); | ||
251 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
252 | psEncCtrl->Gains_Q16[ k ] = silk_SMULWW( psEncCtrl->Gains_Q16[ k ], gain_mult_Q16 ); | ||
253 | silk_assert( psEncCtrl->Gains_Q16[ k ] >= 0 ); | ||
254 | psEncCtrl->Gains_Q16[ k ] = silk_ADD_POS_SAT32( psEncCtrl->Gains_Q16[ k ], gain_add_Q16 ); | ||
255 | } | ||
256 | |||
257 | gain_mult_Q16 = SILK_FIX_CONST( 1.0, 16 ) + silk_RSHIFT_ROUND( silk_MLA( SILK_FIX_CONST( INPUT_TILT, 26 ), | ||
258 | psEncCtrl->coding_quality_Q14, SILK_FIX_CONST( HIGH_RATE_INPUT_TILT, 12 ) ), 10 ); | ||
259 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
260 | psEncCtrl->GainsPre_Q14[ k ] = silk_SMULWB( gain_mult_Q16, psEncCtrl->GainsPre_Q14[ k ] ); | ||
261 | } | ||
262 | |||
263 | /************************************************/ | ||
264 | /* Control low-frequency shaping and noise tilt */ | ||
265 | /************************************************/ | ||
266 | /* Less low frequency shaping for noisy inputs */ | ||
267 | strength_Q16 = silk_MUL( SILK_FIX_CONST( LOW_FREQ_SHAPING, 4 ), silk_SMLAWB( SILK_FIX_CONST( 1.0, 12 ), | ||
268 | SILK_FIX_CONST( LOW_QUALITY_LOW_FREQ_SHAPING_DECR, 13 ), psEnc->sCmn.input_quality_bands_Q15[ 0 ] - SILK_FIX_CONST( 1.0, 15 ) ) ); | ||
269 | strength_Q16 = silk_RSHIFT( silk_MUL( strength_Q16, psEnc->sCmn.speech_activity_Q8 ), 8 ); | ||
270 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
271 | /* Reduce low frequencies quantization noise for periodic signals, depending on pitch lag */ | ||
272 | /*f = 400; freqz([1, -0.98 + 2e-4 * f], [1, -0.97 + 7e-4 * f], 2^12, Fs); axis([0, 1000, -10, 1])*/ | ||
273 | opus_int fs_kHz_inv = silk_DIV32_16( SILK_FIX_CONST( 0.2, 14 ), psEnc->sCmn.fs_kHz ); | ||
274 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
275 | b_Q14 = fs_kHz_inv + silk_DIV32_16( SILK_FIX_CONST( 3.0, 14 ), psEncCtrl->pitchL[ k ] ); | ||
276 | /* Pack two coefficients in one int32 */ | ||
277 | psEncCtrl->LF_shp_Q14[ k ] = silk_LSHIFT( SILK_FIX_CONST( 1.0, 14 ) - b_Q14 - silk_SMULWB( strength_Q16, b_Q14 ), 16 ); | ||
278 | psEncCtrl->LF_shp_Q14[ k ] |= (opus_uint16)( b_Q14 - SILK_FIX_CONST( 1.0, 14 ) ); | ||
279 | } | ||
280 | silk_assert( SILK_FIX_CONST( HARM_HP_NOISE_COEF, 24 ) < SILK_FIX_CONST( 0.5, 24 ) ); /* Guarantees that second argument to SMULWB() is within range of an opus_int16*/ | ||
281 | Tilt_Q16 = - SILK_FIX_CONST( HP_NOISE_COEF, 16 ) - | ||
282 | silk_SMULWB( SILK_FIX_CONST( 1.0, 16 ) - SILK_FIX_CONST( HP_NOISE_COEF, 16 ), | ||
283 | silk_SMULWB( SILK_FIX_CONST( HARM_HP_NOISE_COEF, 24 ), psEnc->sCmn.speech_activity_Q8 ) ); | ||
284 | } else { | ||
285 | b_Q14 = silk_DIV32_16( 21299, psEnc->sCmn.fs_kHz ); /* 1.3_Q0 = 21299_Q14*/ | ||
286 | /* Pack two coefficients in one int32 */ | ||
287 | psEncCtrl->LF_shp_Q14[ 0 ] = silk_LSHIFT( SILK_FIX_CONST( 1.0, 14 ) - b_Q14 - | ||
288 | silk_SMULWB( strength_Q16, silk_SMULWB( SILK_FIX_CONST( 0.6, 16 ), b_Q14 ) ), 16 ); | ||
289 | psEncCtrl->LF_shp_Q14[ 0 ] |= (opus_uint16)( b_Q14 - SILK_FIX_CONST( 1.0, 14 ) ); | ||
290 | for( k = 1; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
291 | psEncCtrl->LF_shp_Q14[ k ] = psEncCtrl->LF_shp_Q14[ 0 ]; | ||
292 | } | ||
293 | Tilt_Q16 = -SILK_FIX_CONST( HP_NOISE_COEF, 16 ); | ||
294 | } | ||
295 | |||
296 | /****************************/ | ||
297 | /* HARMONIC SHAPING CONTROL */ | ||
298 | /****************************/ | ||
299 | /* Control boosting of harmonic frequencies */ | ||
300 | HarmBoost_Q16 = silk_SMULWB( silk_SMULWB( SILK_FIX_CONST( 1.0, 17 ) - silk_LSHIFT( psEncCtrl->coding_quality_Q14, 3 ), | ||
301 | psEnc->LTPCorr_Q15 ), SILK_FIX_CONST( LOW_RATE_HARMONIC_BOOST, 16 ) ); | ||
302 | |||
303 | /* More harmonic boost for noisy input signals */ | ||
304 | HarmBoost_Q16 = silk_SMLAWB( HarmBoost_Q16, | ||
305 | SILK_FIX_CONST( 1.0, 16 ) - silk_LSHIFT( psEncCtrl->input_quality_Q14, 2 ), SILK_FIX_CONST( LOW_INPUT_QUALITY_HARMONIC_BOOST, 16 ) ); | ||
306 | |||
307 | if( USE_HARM_SHAPING && psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
308 | /* More harmonic noise shaping for high bitrates or noisy input */ | ||
309 | HarmShapeGain_Q16 = silk_SMLAWB( SILK_FIX_CONST( HARMONIC_SHAPING, 16 ), | ||
310 | SILK_FIX_CONST( 1.0, 16 ) - silk_SMULWB( SILK_FIX_CONST( 1.0, 18 ) - silk_LSHIFT( psEncCtrl->coding_quality_Q14, 4 ), | ||
311 | psEncCtrl->input_quality_Q14 ), SILK_FIX_CONST( HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING, 16 ) ); | ||
312 | |||
313 | /* Less harmonic noise shaping for less periodic signals */ | ||
314 | HarmShapeGain_Q16 = silk_SMULWB( silk_LSHIFT( HarmShapeGain_Q16, 1 ), | ||
315 | silk_SQRT_APPROX( silk_LSHIFT( psEnc->LTPCorr_Q15, 15 ) ) ); | ||
316 | } else { | ||
317 | HarmShapeGain_Q16 = 0; | ||
318 | } | ||
319 | |||
320 | /*************************/ | ||
321 | /* Smooth over subframes */ | ||
322 | /*************************/ | ||
323 | for( k = 0; k < MAX_NB_SUBFR; k++ ) { | ||
324 | psShapeSt->HarmBoost_smth_Q16 = | ||
325 | silk_SMLAWB( psShapeSt->HarmBoost_smth_Q16, HarmBoost_Q16 - psShapeSt->HarmBoost_smth_Q16, SILK_FIX_CONST( SUBFR_SMTH_COEF, 16 ) ); | ||
326 | psShapeSt->HarmShapeGain_smth_Q16 = | ||
327 | silk_SMLAWB( psShapeSt->HarmShapeGain_smth_Q16, HarmShapeGain_Q16 - psShapeSt->HarmShapeGain_smth_Q16, SILK_FIX_CONST( SUBFR_SMTH_COEF, 16 ) ); | ||
328 | psShapeSt->Tilt_smth_Q16 = | ||
329 | silk_SMLAWB( psShapeSt->Tilt_smth_Q16, Tilt_Q16 - psShapeSt->Tilt_smth_Q16, SILK_FIX_CONST( SUBFR_SMTH_COEF, 16 ) ); | ||
330 | |||
331 | psEncCtrl->HarmBoost_Q14[ k ] = ( opus_int )silk_RSHIFT_ROUND( psShapeSt->HarmBoost_smth_Q16, 2 ); | ||
332 | psEncCtrl->HarmShapeGain_Q14[ k ] = ( opus_int )silk_RSHIFT_ROUND( psShapeSt->HarmShapeGain_smth_Q16, 2 ); | ||
333 | psEncCtrl->Tilt_Q14[ k ] = ( opus_int )silk_RSHIFT_ROUND( psShapeSt->Tilt_smth_Q16, 2 ); | ||
334 | } | ||
335 | RESTORE_STACK; | ||
336 | } | ||