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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/x86/VAD_sse4_1.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/x86/VAD_sse4_1.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/x86/VAD_sse4_1.c b/lib/rbcodec/codecs/libopus/silk/x86/VAD_sse4_1.c new file mode 100644 index 0000000000..d02ddf4ad0 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/x86/VAD_sse4_1.c | |||
@@ -0,0 +1,277 @@ | |||
1 | /* Copyright (c) 2014, Cisco Systems, INC | ||
2 | Written by XiangMingZhu WeiZhou MinPeng YanWang | ||
3 | |||
4 | Redistribution and use in source and binary forms, with or without | ||
5 | modification, are permitted provided that the following conditions | ||
6 | are met: | ||
7 | |||
8 | - Redistributions of source code must retain the above copyright | ||
9 | notice, this list of conditions and the following disclaimer. | ||
10 | |||
11 | - Redistributions in binary form must reproduce the above copyright | ||
12 | notice, this list of conditions and the following disclaimer in the | ||
13 | documentation and/or other materials provided with the distribution. | ||
14 | |||
15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
16 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
17 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
18 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | ||
19 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
20 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
22 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
23 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
24 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
25 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
26 | */ | ||
27 | |||
28 | #ifdef HAVE_CONFIG_H | ||
29 | #include "config.h" | ||
30 | #endif | ||
31 | |||
32 | #include <xmmintrin.h> | ||
33 | #include <emmintrin.h> | ||
34 | #include <smmintrin.h> | ||
35 | |||
36 | #include "main.h" | ||
37 | #include "stack_alloc.h" | ||
38 | |||
39 | /* Weighting factors for tilt measure */ | ||
40 | static const opus_int32 tiltWeights[ VAD_N_BANDS ] = { 30000, 6000, -12000, -12000 }; | ||
41 | |||
42 | /***************************************/ | ||
43 | /* Get the speech activity level in Q8 */ | ||
44 | /***************************************/ | ||
45 | opus_int silk_VAD_GetSA_Q8_sse4_1( /* O Return value, 0 if success */ | ||
46 | silk_encoder_state *psEncC, /* I/O Encoder state */ | ||
47 | const opus_int16 pIn[] /* I PCM input */ | ||
48 | ) | ||
49 | { | ||
50 | opus_int SA_Q15, pSNR_dB_Q7, input_tilt; | ||
51 | opus_int decimated_framelength1, decimated_framelength2; | ||
52 | opus_int decimated_framelength; | ||
53 | opus_int dec_subframe_length, dec_subframe_offset, SNR_Q7, i, b, s; | ||
54 | opus_int32 sumSquared, smooth_coef_Q16; | ||
55 | opus_int16 HPstateTmp; | ||
56 | VARDECL( opus_int16, X ); | ||
57 | opus_int32 Xnrg[ VAD_N_BANDS ]; | ||
58 | opus_int32 NrgToNoiseRatio_Q8[ VAD_N_BANDS ]; | ||
59 | opus_int32 speech_nrg, x_tmp; | ||
60 | opus_int X_offset[ VAD_N_BANDS ]; | ||
61 | opus_int ret = 0; | ||
62 | silk_VAD_state *psSilk_VAD = &psEncC->sVAD; | ||
63 | |||
64 | SAVE_STACK; | ||
65 | |||
66 | /* Safety checks */ | ||
67 | silk_assert( VAD_N_BANDS == 4 ); | ||
68 | celt_assert( MAX_FRAME_LENGTH >= psEncC->frame_length ); | ||
69 | celt_assert( psEncC->frame_length <= 512 ); | ||
70 | celt_assert( psEncC->frame_length == 8 * silk_RSHIFT( psEncC->frame_length, 3 ) ); | ||
71 | |||
72 | /***********************/ | ||
73 | /* Filter and Decimate */ | ||
74 | /***********************/ | ||
75 | decimated_framelength1 = silk_RSHIFT( psEncC->frame_length, 1 ); | ||
76 | decimated_framelength2 = silk_RSHIFT( psEncC->frame_length, 2 ); | ||
77 | decimated_framelength = silk_RSHIFT( psEncC->frame_length, 3 ); | ||
78 | /* Decimate into 4 bands: | ||
79 | 0 L 3L L 3L 5L | ||
80 | - -- - -- -- | ||
81 | 8 8 2 4 4 | ||
82 | |||
83 | [0-1 kHz| temp. |1-2 kHz| 2-4 kHz | 4-8 kHz | | ||
84 | |||
85 | They're arranged to allow the minimal ( frame_length / 4 ) extra | ||
86 | scratch space during the downsampling process */ | ||
87 | X_offset[ 0 ] = 0; | ||
88 | X_offset[ 1 ] = decimated_framelength + decimated_framelength2; | ||
89 | X_offset[ 2 ] = X_offset[ 1 ] + decimated_framelength; | ||
90 | X_offset[ 3 ] = X_offset[ 2 ] + decimated_framelength2; | ||
91 | ALLOC( X, X_offset[ 3 ] + decimated_framelength1, opus_int16 ); | ||
92 | |||
93 | /* 0-8 kHz to 0-4 kHz and 4-8 kHz */ | ||
94 | silk_ana_filt_bank_1( pIn, &psSilk_VAD->AnaState[ 0 ], | ||
95 | X, &X[ X_offset[ 3 ] ], psEncC->frame_length ); | ||
96 | |||
97 | /* 0-4 kHz to 0-2 kHz and 2-4 kHz */ | ||
98 | silk_ana_filt_bank_1( X, &psSilk_VAD->AnaState1[ 0 ], | ||
99 | X, &X[ X_offset[ 2 ] ], decimated_framelength1 ); | ||
100 | |||
101 | /* 0-2 kHz to 0-1 kHz and 1-2 kHz */ | ||
102 | silk_ana_filt_bank_1( X, &psSilk_VAD->AnaState2[ 0 ], | ||
103 | X, &X[ X_offset[ 1 ] ], decimated_framelength2 ); | ||
104 | |||
105 | /*********************************************/ | ||
106 | /* HP filter on lowest band (differentiator) */ | ||
107 | /*********************************************/ | ||
108 | X[ decimated_framelength - 1 ] = silk_RSHIFT( X[ decimated_framelength - 1 ], 1 ); | ||
109 | HPstateTmp = X[ decimated_framelength - 1 ]; | ||
110 | for( i = decimated_framelength - 1; i > 0; i-- ) { | ||
111 | X[ i - 1 ] = silk_RSHIFT( X[ i - 1 ], 1 ); | ||
112 | X[ i ] -= X[ i - 1 ]; | ||
113 | } | ||
114 | X[ 0 ] -= psSilk_VAD->HPstate; | ||
115 | psSilk_VAD->HPstate = HPstateTmp; | ||
116 | |||
117 | /*************************************/ | ||
118 | /* Calculate the energy in each band */ | ||
119 | /*************************************/ | ||
120 | for( b = 0; b < VAD_N_BANDS; b++ ) { | ||
121 | /* Find the decimated framelength in the non-uniformly divided bands */ | ||
122 | decimated_framelength = silk_RSHIFT( psEncC->frame_length, silk_min_int( VAD_N_BANDS - b, VAD_N_BANDS - 1 ) ); | ||
123 | |||
124 | /* Split length into subframe lengths */ | ||
125 | dec_subframe_length = silk_RSHIFT( decimated_framelength, VAD_INTERNAL_SUBFRAMES_LOG2 ); | ||
126 | dec_subframe_offset = 0; | ||
127 | |||
128 | /* Compute energy per sub-frame */ | ||
129 | /* initialize with summed energy of last subframe */ | ||
130 | Xnrg[ b ] = psSilk_VAD->XnrgSubfr[ b ]; | ||
131 | for( s = 0; s < VAD_INTERNAL_SUBFRAMES; s++ ) { | ||
132 | __m128i xmm_X, xmm_acc; | ||
133 | sumSquared = 0; | ||
134 | |||
135 | xmm_acc = _mm_setzero_si128(); | ||
136 | |||
137 | for( i = 0; i < dec_subframe_length - 7; i += 8 ) | ||
138 | { | ||
139 | xmm_X = _mm_loadu_si128( (__m128i *)&(X[ X_offset[ b ] + i + dec_subframe_offset ] ) ); | ||
140 | xmm_X = _mm_srai_epi16( xmm_X, 3 ); | ||
141 | xmm_X = _mm_madd_epi16( xmm_X, xmm_X ); | ||
142 | xmm_acc = _mm_add_epi32( xmm_acc, xmm_X ); | ||
143 | } | ||
144 | |||
145 | xmm_acc = _mm_add_epi32( xmm_acc, _mm_unpackhi_epi64( xmm_acc, xmm_acc ) ); | ||
146 | xmm_acc = _mm_add_epi32( xmm_acc, _mm_shufflelo_epi16( xmm_acc, 0x0E ) ); | ||
147 | |||
148 | sumSquared += _mm_cvtsi128_si32( xmm_acc ); | ||
149 | |||
150 | for( ; i < dec_subframe_length; i++ ) { | ||
151 | /* The energy will be less than dec_subframe_length * ( silk_int16_MIN / 8 ) ^ 2. */ | ||
152 | /* Therefore we can accumulate with no risk of overflow (unless dec_subframe_length > 128) */ | ||
153 | x_tmp = silk_RSHIFT( | ||
154 | X[ X_offset[ b ] + i + dec_subframe_offset ], 3 ); | ||
155 | sumSquared = silk_SMLABB( sumSquared, x_tmp, x_tmp ); | ||
156 | |||
157 | /* Safety check */ | ||
158 | silk_assert( sumSquared >= 0 ); | ||
159 | } | ||
160 | |||
161 | /* Add/saturate summed energy of current subframe */ | ||
162 | if( s < VAD_INTERNAL_SUBFRAMES - 1 ) { | ||
163 | Xnrg[ b ] = silk_ADD_POS_SAT32( Xnrg[ b ], sumSquared ); | ||
164 | } else { | ||
165 | /* Look-ahead subframe */ | ||
166 | Xnrg[ b ] = silk_ADD_POS_SAT32( Xnrg[ b ], silk_RSHIFT( sumSquared, 1 ) ); | ||
167 | } | ||
168 | |||
169 | dec_subframe_offset += dec_subframe_length; | ||
170 | } | ||
171 | psSilk_VAD->XnrgSubfr[ b ] = sumSquared; | ||
172 | } | ||
173 | |||
174 | /********************/ | ||
175 | /* Noise estimation */ | ||
176 | /********************/ | ||
177 | silk_VAD_GetNoiseLevels( &Xnrg[ 0 ], psSilk_VAD ); | ||
178 | |||
179 | /***********************************************/ | ||
180 | /* Signal-plus-noise to noise ratio estimation */ | ||
181 | /***********************************************/ | ||
182 | sumSquared = 0; | ||
183 | input_tilt = 0; | ||
184 | for( b = 0; b < VAD_N_BANDS; b++ ) { | ||
185 | speech_nrg = Xnrg[ b ] - psSilk_VAD->NL[ b ]; | ||
186 | if( speech_nrg > 0 ) { | ||
187 | /* Divide, with sufficient resolution */ | ||
188 | if( ( Xnrg[ b ] & 0xFF800000 ) == 0 ) { | ||
189 | NrgToNoiseRatio_Q8[ b ] = silk_DIV32( silk_LSHIFT( Xnrg[ b ], 8 ), psSilk_VAD->NL[ b ] + 1 ); | ||
190 | } else { | ||
191 | NrgToNoiseRatio_Q8[ b ] = silk_DIV32( Xnrg[ b ], silk_RSHIFT( psSilk_VAD->NL[ b ], 8 ) + 1 ); | ||
192 | } | ||
193 | |||
194 | /* Convert to log domain */ | ||
195 | SNR_Q7 = silk_lin2log( NrgToNoiseRatio_Q8[ b ] ) - 8 * 128; | ||
196 | |||
197 | /* Sum-of-squares */ | ||
198 | sumSquared = silk_SMLABB( sumSquared, SNR_Q7, SNR_Q7 ); /* Q14 */ | ||
199 | |||
200 | /* Tilt measure */ | ||
201 | if( speech_nrg < ( (opus_int32)1 << 20 ) ) { | ||
202 | /* Scale down SNR value for small subband speech energies */ | ||
203 | SNR_Q7 = silk_SMULWB( silk_LSHIFT( silk_SQRT_APPROX( speech_nrg ), 6 ), SNR_Q7 ); | ||
204 | } | ||
205 | input_tilt = silk_SMLAWB( input_tilt, tiltWeights[ b ], SNR_Q7 ); | ||
206 | } else { | ||
207 | NrgToNoiseRatio_Q8[ b ] = 256; | ||
208 | } | ||
209 | } | ||
210 | |||
211 | /* Mean-of-squares */ | ||
212 | sumSquared = silk_DIV32_16( sumSquared, VAD_N_BANDS ); /* Q14 */ | ||
213 | |||
214 | /* Root-mean-square approximation, scale to dBs, and write to output pointer */ | ||
215 | pSNR_dB_Q7 = (opus_int16)( 3 * silk_SQRT_APPROX( sumSquared ) ); /* Q7 */ | ||
216 | |||
217 | /*********************************/ | ||
218 | /* Speech Probability Estimation */ | ||
219 | /*********************************/ | ||
220 | SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - VAD_NEGATIVE_OFFSET_Q5 ); | ||
221 | |||
222 | /**************************/ | ||
223 | /* Frequency Tilt Measure */ | ||
224 | /**************************/ | ||
225 | psEncC->input_tilt_Q15 = silk_LSHIFT( silk_sigm_Q15( input_tilt ) - 16384, 1 ); | ||
226 | |||
227 | /**************************************************/ | ||
228 | /* Scale the sigmoid output based on power levels */ | ||
229 | /**************************************************/ | ||
230 | speech_nrg = 0; | ||
231 | for( b = 0; b < VAD_N_BANDS; b++ ) { | ||
232 | /* Accumulate signal-without-noise energies, higher frequency bands have more weight */ | ||
233 | speech_nrg += ( b + 1 ) * silk_RSHIFT( Xnrg[ b ] - psSilk_VAD->NL[ b ], 4 ); | ||
234 | } | ||
235 | |||
236 | /* Power scaling */ | ||
237 | if( speech_nrg <= 0 ) { | ||
238 | SA_Q15 = silk_RSHIFT( SA_Q15, 1 ); | ||
239 | } else if( speech_nrg < 32768 ) { | ||
240 | if( psEncC->frame_length == 10 * psEncC->fs_kHz ) { | ||
241 | speech_nrg = silk_LSHIFT_SAT32( speech_nrg, 16 ); | ||
242 | } else { | ||
243 | speech_nrg = silk_LSHIFT_SAT32( speech_nrg, 15 ); | ||
244 | } | ||
245 | |||
246 | /* square-root */ | ||
247 | speech_nrg = silk_SQRT_APPROX( speech_nrg ); | ||
248 | SA_Q15 = silk_SMULWB( 32768 + speech_nrg, SA_Q15 ); | ||
249 | } | ||
250 | |||
251 | /* Copy the resulting speech activity in Q8 */ | ||
252 | psEncC->speech_activity_Q8 = silk_min_int( silk_RSHIFT( SA_Q15, 7 ), silk_uint8_MAX ); | ||
253 | |||
254 | /***********************************/ | ||
255 | /* Energy Level and SNR estimation */ | ||
256 | /***********************************/ | ||
257 | /* Smoothing coefficient */ | ||
258 | smooth_coef_Q16 = silk_SMULWB( VAD_SNR_SMOOTH_COEF_Q18, silk_SMULWB( (opus_int32)SA_Q15, SA_Q15 ) ); | ||
259 | |||
260 | if( psEncC->frame_length == 10 * psEncC->fs_kHz ) { | ||
261 | smooth_coef_Q16 >>= 1; | ||
262 | } | ||
263 | |||
264 | for( b = 0; b < VAD_N_BANDS; b++ ) { | ||
265 | /* compute smoothed energy-to-noise ratio per band */ | ||
266 | psSilk_VAD->NrgRatioSmth_Q8[ b ] = silk_SMLAWB( psSilk_VAD->NrgRatioSmth_Q8[ b ], | ||
267 | NrgToNoiseRatio_Q8[ b ] - psSilk_VAD->NrgRatioSmth_Q8[ b ], smooth_coef_Q16 ); | ||
268 | |||
269 | /* signal to noise ratio in dB per band */ | ||
270 | SNR_Q7 = 3 * ( silk_lin2log( psSilk_VAD->NrgRatioSmth_Q8[b] ) - 8 * 128 ); | ||
271 | /* quality = sigmoid( 0.25 * ( SNR_dB - 16 ) ); */ | ||
272 | psEncC->input_quality_bands_Q15[ b ] = silk_sigm_Q15( silk_RSHIFT( SNR_Q7 - 16 * 128, 4 ) ); | ||
273 | } | ||
274 | |||
275 | RESTORE_STACK; | ||
276 | return( ret ); | ||
277 | } | ||