The Tor Browser / annotate

media/libopus/silk/SigProc_FIX.h@ac0c01689b40 (annotated)

media/libopus/silk/SigProc_FIX.h

Thu, 15 Jan 2015 15:59:08 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 15 Jan 2015 15:59:08 +0100
branch
TOR_BUG_9701
changeset 10
ac0c01689b40
permissions
-rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0 1 /***********************************************************************
michael@0 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
michael@0 3 Redistribution and use in source and binary forms, with or without
michael@0 4 modification, are permitted provided that the following conditions
michael@0 5 are met:
michael@0 6 - Redistributions of source code must retain the above copyright notice,
michael@0 7 this list of conditions and the following disclaimer.
michael@0 8 - Redistributions in binary form must reproduce the above copyright
michael@0 9 notice, this list of conditions and the following disclaimer in the
michael@0 10 documentation and/or other materials provided with the distribution.
michael@0 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
michael@0 12 names of specific contributors, may be used to endorse or promote
michael@0 13 products derived from this software without specific prior written
michael@0 14 permission.
michael@0 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
michael@0 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
michael@0 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
michael@0 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
michael@0 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
michael@0 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
michael@0 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
michael@0 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
michael@0 25 POSSIBILITY OF SUCH DAMAGE.
michael@0 26 ***********************************************************************/
michael@0 27
michael@0 28 #ifndef SILK_SIGPROC_FIX_H
michael@0 29 #define SILK_SIGPROC_FIX_H
michael@0 30
michael@0 31 #ifdef __cplusplus
michael@0 32 extern "C"
michael@0 33 {
michael@0 34 #endif
michael@0 35
michael@0 36 /*#define silk_MACRO_COUNT */ /* Used to enable WMOPS counting */
michael@0 37
michael@0 38 #define SILK_MAX_ORDER_LPC 16 /* max order of the LPC analysis in schur() and k2a() */
michael@0 39
michael@0 40 #include <string.h> /* for memset(), memcpy(), memmove() */
michael@0 41 #include "typedef.h"
michael@0 42 #include "resampler_structs.h"
michael@0 43 #include "macros.h"
michael@0 44
michael@0 45
michael@0 46 /********************************************************************/
michael@0 47 /* SIGNAL PROCESSING FUNCTIONS */
michael@0 48 /********************************************************************/
michael@0 49
michael@0 50 /*!
michael@0 51 * Initialize/reset the resampler state for a given pair of input/output sampling rates
michael@0 52 */
michael@0 53 opus_int silk_resampler_init(
michael@0 54 silk_resampler_state_struct *S, /* I/O Resampler state */
michael@0 55 opus_int32 Fs_Hz_in, /* I Input sampling rate (Hz) */
michael@0 56 opus_int32 Fs_Hz_out, /* I Output sampling rate (Hz) */
michael@0 57 opus_int forEnc /* I If 1: encoder; if 0: decoder */
michael@0 58 );
michael@0 59
michael@0 60 /*!
michael@0 61 * Resampler: convert from one sampling rate to another
michael@0 62 */
michael@0 63 opus_int silk_resampler(
michael@0 64 silk_resampler_state_struct *S, /* I/O Resampler state */
michael@0 65 opus_int16 out[], /* O Output signal */
michael@0 66 const opus_int16 in[], /* I Input signal */
michael@0 67 opus_int32 inLen /* I Number of input samples */
michael@0 68 );
michael@0 69
michael@0 70 /*!
michael@0 71 * Downsample 2x, mediocre quality
michael@0 72 */
michael@0 73 void silk_resampler_down2(
michael@0 74 opus_int32 *S, /* I/O State vector [ 2 ] */
michael@0 75 opus_int16 *out, /* O Output signal [ len ] */
michael@0 76 const opus_int16 *in, /* I Input signal [ floor(len/2) ] */
michael@0 77 opus_int32 inLen /* I Number of input samples */
michael@0 78 );
michael@0 79
michael@0 80 /*!
michael@0 81 * Downsample by a factor 2/3, low quality
michael@0 82 */
michael@0 83 void silk_resampler_down2_3(
michael@0 84 opus_int32 *S, /* I/O State vector [ 6 ] */
michael@0 85 opus_int16 *out, /* O Output signal [ floor(2*inLen/3) ] */
michael@0 86 const opus_int16 *in, /* I Input signal [ inLen ] */
michael@0 87 opus_int32 inLen /* I Number of input samples */
michael@0 88 );
michael@0 89
michael@0 90 /*!
michael@0 91 * second order ARMA filter;
michael@0 92 * slower than biquad() but uses more precise coefficients
michael@0 93 * can handle (slowly) varying coefficients
michael@0 94 */
michael@0 95 void silk_biquad_alt(
michael@0 96 const opus_int16 *in, /* I input signal */
michael@0 97 const opus_int32 *B_Q28, /* I MA coefficients [3] */
michael@0 98 const opus_int32 *A_Q28, /* I AR coefficients [2] */
michael@0 99 opus_int32 *S, /* I/O State vector [2] */
michael@0 100 opus_int16 *out, /* O output signal */
michael@0 101 const opus_int32 len, /* I signal length (must be even) */
michael@0 102 opus_int stride /* I Operate on interleaved signal if > 1 */
michael@0 103 );
michael@0 104
michael@0 105 /* Variable order MA prediction error filter. */
michael@0 106 void silk_LPC_analysis_filter(
michael@0 107 opus_int16 *out, /* O Output signal */
michael@0 108 const opus_int16 *in, /* I Input signal */
michael@0 109 const opus_int16 *B, /* I MA prediction coefficients, Q12 [order] */
michael@0 110 const opus_int32 len, /* I Signal length */
michael@0 111 const opus_int32 d /* I Filter order */
michael@0 112 );
michael@0 113
michael@0 114 /* Chirp (bandwidth expand) LP AR filter */
michael@0 115 void silk_bwexpander(
michael@0 116 opus_int16 *ar, /* I/O AR filter to be expanded (without leading 1) */
michael@0 117 const opus_int d, /* I Length of ar */
michael@0 118 opus_int32 chirp_Q16 /* I Chirp factor (typically in the range 0 to 1) */
michael@0 119 );
michael@0 120
michael@0 121 /* Chirp (bandwidth expand) LP AR filter */
michael@0 122 void silk_bwexpander_32(
michael@0 123 opus_int32 *ar, /* I/O AR filter to be expanded (without leading 1) */
michael@0 124 const opus_int d, /* I Length of ar */
michael@0 125 opus_int32 chirp_Q16 /* I Chirp factor in Q16 */
michael@0 126 );
michael@0 127
michael@0 128 /* Compute inverse of LPC prediction gain, and */
michael@0 129 /* test if LPC coefficients are stable (all poles within unit circle) */
michael@0 130 opus_int32 silk_LPC_inverse_pred_gain( /* O Returns inverse prediction gain in energy domain, Q30 */
michael@0 131 const opus_int16 *A_Q12, /* I Prediction coefficients, Q12 [order] */
michael@0 132 const opus_int order /* I Prediction order */
michael@0 133 );
michael@0 134
michael@0 135 /* For input in Q24 domain */
michael@0 136 opus_int32 silk_LPC_inverse_pred_gain_Q24( /* O Returns inverse prediction gain in energy domain, Q30 */
michael@0 137 const opus_int32 *A_Q24, /* I Prediction coefficients [order] */
michael@0 138 const opus_int order /* I Prediction order */
michael@0 139 );
michael@0 140
michael@0 141 /* Split signal in two decimated bands using first-order allpass filters */
michael@0 142 void silk_ana_filt_bank_1(
michael@0 143 const opus_int16 *in, /* I Input signal [N] */
michael@0 144 opus_int32 *S, /* I/O State vector [2] */
michael@0 145 opus_int16 *outL, /* O Low band [N/2] */
michael@0 146 opus_int16 *outH, /* O High band [N/2] */
michael@0 147 const opus_int32 N /* I Number of input samples */
michael@0 148 );
michael@0 149
michael@0 150 /********************************************************************/
michael@0 151 /* SCALAR FUNCTIONS */
michael@0 152 /********************************************************************/
michael@0 153
michael@0 154 /* Approximation of 128 * log2() (exact inverse of approx 2^() below) */
michael@0 155 /* Convert input to a log scale */
michael@0 156 opus_int32 silk_lin2log(
michael@0 157 const opus_int32 inLin /* I input in linear scale */
michael@0 158 );
michael@0 159
michael@0 160 /* Approximation of a sigmoid function */
michael@0 161 opus_int silk_sigm_Q15(
michael@0 162 opus_int in_Q5 /* I */
michael@0 163 );
michael@0 164
michael@0 165 /* Approximation of 2^() (exact inverse of approx log2() above) */
michael@0 166 /* Convert input to a linear scale */
michael@0 167 opus_int32 silk_log2lin(
michael@0 168 const opus_int32 inLog_Q7 /* I input on log scale */
michael@0 169 );
michael@0 170
michael@0 171 /* Compute number of bits to right shift the sum of squares of a vector */
michael@0 172 /* of int16s to make it fit in an int32 */
michael@0 173 void silk_sum_sqr_shift(
michael@0 174 opus_int32 *energy, /* O Energy of x, after shifting to the right */
michael@0 175 opus_int *shift, /* O Number of bits right shift applied to energy */
michael@0 176 const opus_int16 *x, /* I Input vector */
michael@0 177 opus_int len /* I Length of input vector */
michael@0 178 );
michael@0 179
michael@0 180 /* Calculates the reflection coefficients from the correlation sequence */
michael@0 181 /* Faster than schur64(), but much less accurate. */
michael@0 182 /* uses SMLAWB(), requiring armv5E and higher. */
michael@0 183 opus_int32 silk_schur( /* O Returns residual energy */
michael@0 184 opus_int16 *rc_Q15, /* O reflection coefficients [order] Q15 */
michael@0 185 const opus_int32 *c, /* I correlations [order+1] */
michael@0 186 const opus_int32 order /* I prediction order */
michael@0 187 );
michael@0 188
michael@0 189 /* Calculates the reflection coefficients from the correlation sequence */
michael@0 190 /* Slower than schur(), but more accurate. */
michael@0 191 /* Uses SMULL(), available on armv4 */
michael@0 192 opus_int32 silk_schur64( /* O returns residual energy */
michael@0 193 opus_int32 rc_Q16[], /* O Reflection coefficients [order] Q16 */
michael@0 194 const opus_int32 c[], /* I Correlations [order+1] */
michael@0 195 opus_int32 order /* I Prediction order */
michael@0 196 );
michael@0 197
michael@0 198 /* Step up function, converts reflection coefficients to prediction coefficients */
michael@0 199 void silk_k2a(
michael@0 200 opus_int32 *A_Q24, /* O Prediction coefficients [order] Q24 */
michael@0 201 const opus_int16 *rc_Q15, /* I Reflection coefficients [order] Q15 */
michael@0 202 const opus_int32 order /* I Prediction order */
michael@0 203 );
michael@0 204
michael@0 205 /* Step up function, converts reflection coefficients to prediction coefficients */
michael@0 206 void silk_k2a_Q16(
michael@0 207 opus_int32 *A_Q24, /* O Prediction coefficients [order] Q24 */
michael@0 208 const opus_int32 *rc_Q16, /* I Reflection coefficients [order] Q16 */
michael@0 209 const opus_int32 order /* I Prediction order */
michael@0 210 );
michael@0 211
michael@0 212 /* Apply sine window to signal vector. */
michael@0 213 /* Window types: */
michael@0 214 /* 1 -> sine window from 0 to pi/2 */
michael@0 215 /* 2 -> sine window from pi/2 to pi */
michael@0 216 /* every other sample of window is linearly interpolated, for speed */
michael@0 217 void silk_apply_sine_window(
michael@0 218 opus_int16 px_win[], /* O Pointer to windowed signal */
michael@0 219 const opus_int16 px[], /* I Pointer to input signal */
michael@0 220 const opus_int win_type, /* I Selects a window type */
michael@0 221 const opus_int length /* I Window length, multiple of 4 */
michael@0 222 );
michael@0 223
michael@0 224 /* Compute autocorrelation */
michael@0 225 void silk_autocorr(
michael@0 226 opus_int32 *results, /* O Result (length correlationCount) */
michael@0 227 opus_int *scale, /* O Scaling of the correlation vector */
michael@0 228 const opus_int16 *inputData, /* I Input data to correlate */
michael@0 229 const opus_int inputDataSize, /* I Length of input */
michael@0 230 const opus_int correlationCount, /* I Number of correlation taps to compute */
michael@0 231 int arch /* I Run-time architecture */
michael@0 232 );
michael@0 233
michael@0 234 void silk_decode_pitch(
michael@0 235 opus_int16 lagIndex, /* I */
michael@0 236 opus_int8 contourIndex, /* O */
michael@0 237 opus_int pitch_lags[], /* O 4 pitch values */
michael@0 238 const opus_int Fs_kHz, /* I sampling frequency (kHz) */
michael@0 239 const opus_int nb_subfr /* I number of sub frames */
michael@0 240 );
michael@0 241
michael@0 242 opus_int silk_pitch_analysis_core( /* O Voicing estimate: 0 voiced, 1 unvoiced */
michael@0 243 const opus_int16 *frame, /* I Signal of length PE_FRAME_LENGTH_MS*Fs_kHz */
michael@0 244 opus_int *pitch_out, /* O 4 pitch lag values */
michael@0 245 opus_int16 *lagIndex, /* O Lag Index */
michael@0 246 opus_int8 *contourIndex, /* O Pitch contour Index */
michael@0 247 opus_int *LTPCorr_Q15, /* I/O Normalized correlation; input: value from previous frame */
michael@0 248 opus_int prevLag, /* I Last lag of previous frame; set to zero is unvoiced */
michael@0 249 const opus_int32 search_thres1_Q16, /* I First stage threshold for lag candidates 0 - 1 */
michael@0 250 const opus_int search_thres2_Q13, /* I Final threshold for lag candidates 0 - 1 */
michael@0 251 const opus_int Fs_kHz, /* I Sample frequency (kHz) */
michael@0 252 const opus_int complexity, /* I Complexity setting, 0-2, where 2 is highest */
michael@0 253 const opus_int nb_subfr, /* I number of 5 ms subframes */
michael@0 254 int arch /* I Run-time architecture */
michael@0 255 );
michael@0 256
michael@0 257 /* Compute Normalized Line Spectral Frequencies (NLSFs) from whitening filter coefficients */
michael@0 258 /* If not all roots are found, the a_Q16 coefficients are bandwidth expanded until convergence. */
michael@0 259 void silk_A2NLSF(
michael@0 260 opus_int16 *NLSF, /* O Normalized Line Spectral Frequencies in Q15 (0..2^15-1) [d] */
michael@0 261 opus_int32 *a_Q16, /* I/O Monic whitening filter coefficients in Q16 [d] */
michael@0 262 const opus_int d /* I Filter order (must be even) */
michael@0 263 );
michael@0 264
michael@0 265 /* compute whitening filter coefficients from normalized line spectral frequencies */
michael@0 266 void silk_NLSF2A(
michael@0 267 opus_int16 *a_Q12, /* O monic whitening filter coefficients in Q12, [ d ] */
michael@0 268 const opus_int16 *NLSF, /* I normalized line spectral frequencies in Q15, [ d ] */
michael@0 269 const opus_int d /* I filter order (should be even) */
michael@0 270 );
michael@0 271
michael@0 272 void silk_insertion_sort_increasing(
michael@0 273 opus_int32 *a, /* I/O Unsorted / Sorted vector */
michael@0 274 opus_int *idx, /* O Index vector for the sorted elements */
michael@0 275 const opus_int L, /* I Vector length */
michael@0 276 const opus_int K /* I Number of correctly sorted positions */
michael@0 277 );
michael@0 278
michael@0 279 void silk_insertion_sort_decreasing_int16(
michael@0 280 opus_int16 *a, /* I/O Unsorted / Sorted vector */
michael@0 281 opus_int *idx, /* O Index vector for the sorted elements */
michael@0 282 const opus_int L, /* I Vector length */
michael@0 283 const opus_int K /* I Number of correctly sorted positions */
michael@0 284 );
michael@0 285
michael@0 286 void silk_insertion_sort_increasing_all_values_int16(
michael@0 287 opus_int16 *a, /* I/O Unsorted / Sorted vector */
michael@0 288 const opus_int L /* I Vector length */
michael@0 289 );
michael@0 290
michael@0 291 /* NLSF stabilizer, for a single input data vector */
michael@0 292 void silk_NLSF_stabilize(
michael@0 293 opus_int16 *NLSF_Q15, /* I/O Unstable/stabilized normalized LSF vector in Q15 [L] */
michael@0 294 const opus_int16 *NDeltaMin_Q15, /* I Min distance vector, NDeltaMin_Q15[L] must be >= 1 [L+1] */
michael@0 295 const opus_int L /* I Number of NLSF parameters in the input vector */
michael@0 296 );
michael@0 297
michael@0 298 /* Laroia low complexity NLSF weights */
michael@0 299 void silk_NLSF_VQ_weights_laroia(
michael@0 300 opus_int16 *pNLSFW_Q_OUT, /* O Pointer to input vector weights [D] */
michael@0 301 const opus_int16 *pNLSF_Q15, /* I Pointer to input vector [D] */
michael@0 302 const opus_int D /* I Input vector dimension (even) */
michael@0 303 );
michael@0 304
michael@0 305 /* Compute reflection coefficients from input signal */
michael@0 306 void silk_burg_modified(
michael@0 307 opus_int32 *res_nrg, /* O Residual energy */
michael@0 308 opus_int *res_nrg_Q, /* O Residual energy Q value */
michael@0 309 opus_int32 A_Q16[], /* O Prediction coefficients (length order) */
michael@0 310 const opus_int16 x[], /* I Input signal, length: nb_subfr * ( D + subfr_length ) */
michael@0 311 const opus_int32 minInvGain_Q30, /* I Inverse of max prediction gain */
michael@0 312 const opus_int subfr_length, /* I Input signal subframe length (incl. D preceding samples) */
michael@0 313 const opus_int nb_subfr, /* I Number of subframes stacked in x */
michael@0 314 const opus_int D, /* I Order */
michael@0 315 int arch /* I Run-time architecture */
michael@0 316 );
michael@0 317
michael@0 318 /* Copy and multiply a vector by a constant */
michael@0 319 void silk_scale_copy_vector16(
michael@0 320 opus_int16 *data_out,
michael@0 321 const opus_int16 *data_in,
michael@0 322 opus_int32 gain_Q16, /* I Gain in Q16 */
michael@0 323 const opus_int dataSize /* I Length */
michael@0 324 );
michael@0 325
michael@0 326 /* Some for the LTP related function requires Q26 to work.*/
michael@0 327 void silk_scale_vector32_Q26_lshift_18(
michael@0 328 opus_int32 *data1, /* I/O Q0/Q18 */
michael@0 329 opus_int32 gain_Q26, /* I Q26 */
michael@0 330 opus_int dataSize /* I length */
michael@0 331 );
michael@0 332
michael@0 333 /********************************************************************/
michael@0 334 /* INLINE ARM MATH */
michael@0 335 /********************************************************************/
michael@0 336
michael@0 337 /* return sum( inVec1[i] * inVec2[i] ) */
michael@0 338 opus_int32 silk_inner_prod_aligned(
michael@0 339 const opus_int16 *const inVec1, /* I input vector 1 */
michael@0 340 const opus_int16 *const inVec2, /* I input vector 2 */
michael@0 341 const opus_int len /* I vector lengths */
michael@0 342 );
michael@0 343
michael@0 344 opus_int32 silk_inner_prod_aligned_scale(
michael@0 345 const opus_int16 *const inVec1, /* I input vector 1 */
michael@0 346 const opus_int16 *const inVec2, /* I input vector 2 */
michael@0 347 const opus_int scale, /* I number of bits to shift */
michael@0 348 const opus_int len /* I vector lengths */
michael@0 349 );
michael@0 350
michael@0 351 opus_int64 silk_inner_prod16_aligned_64(
michael@0 352 const opus_int16 *inVec1, /* I input vector 1 */
michael@0 353 const opus_int16 *inVec2, /* I input vector 2 */
michael@0 354 const opus_int len /* I vector lengths */
michael@0 355 );
michael@0 356
michael@0 357 /********************************************************************/
michael@0 358 /* MACROS */
michael@0 359 /********************************************************************/
michael@0 360
michael@0 361 /* Rotate a32 right by 'rot' bits. Negative rot values result in rotating
michael@0 362 left. Output is 32bit int.
michael@0 363 Note: contemporary compilers recognize the C expression below and
michael@0 364 compile it into a 'ror' instruction if available. No need for OPUS_INLINE ASM! */
michael@0 365 static OPUS_INLINE opus_int32 silk_ROR32( opus_int32 a32, opus_int rot )
michael@0 366 {
michael@0 367 opus_uint32 x = (opus_uint32) a32;
michael@0 368 opus_uint32 r = (opus_uint32) rot;
michael@0 369 opus_uint32 m = (opus_uint32) -rot;
michael@0 370 if( rot == 0 ) {
michael@0 371 return a32;
michael@0 372 } else if( rot < 0 ) {
michael@0 373 return (opus_int32) ((x << m) | (x >> (32 - m)));
michael@0 374 } else {
michael@0 375 return (opus_int32) ((x << (32 - r)) | (x >> r));
michael@0 376 }
michael@0 377 }
michael@0 378
michael@0 379 /* Allocate opus_int16 aligned to 4-byte memory address */
michael@0 380 #if EMBEDDED_ARM
michael@0 381 #define silk_DWORD_ALIGN __attribute__((aligned(4)))
michael@0 382 #else
michael@0 383 #define silk_DWORD_ALIGN
michael@0 384 #endif
michael@0 385
michael@0 386 /* Useful Macros that can be adjusted to other platforms */
michael@0 387 #define silk_memcpy(dest, src, size) memcpy((dest), (src), (size))
michael@0 388 #define silk_memset(dest, src, size) memset((dest), (src), (size))
michael@0 389 #define silk_memmove(dest, src, size) memmove((dest), (src), (size))
michael@0 390
michael@0 391 /* Fixed point macros */
michael@0 392
michael@0 393 /* (a32 * b32) output have to be 32bit int */
michael@0 394 #define silk_MUL(a32, b32) ((a32) * (b32))
michael@0 395
michael@0 396 /* (a32 * b32) output have to be 32bit uint */
michael@0 397 #define silk_MUL_uint(a32, b32) silk_MUL(a32, b32)
michael@0 398
michael@0 399 /* a32 + (b32 * c32) output have to be 32bit int */
michael@0 400 #define silk_MLA(a32, b32, c32) silk_ADD32((a32),((b32) * (c32)))
michael@0 401
michael@0 402 /* a32 + (b32 * c32) output have to be 32bit uint */
michael@0 403 #define silk_MLA_uint(a32, b32, c32) silk_MLA(a32, b32, c32)
michael@0 404
michael@0 405 /* ((a32 >> 16) * (b32 >> 16)) output have to be 32bit int */
michael@0 406 #define silk_SMULTT(a32, b32) (((a32) >> 16) * ((b32) >> 16))
michael@0 407
michael@0 408 /* a32 + ((a32 >> 16) * (b32 >> 16)) output have to be 32bit int */
michael@0 409 #define silk_SMLATT(a32, b32, c32) silk_ADD32((a32),((b32) >> 16) * ((c32) >> 16))
michael@0 410
michael@0 411 #define silk_SMLALBB(a64, b16, c16) silk_ADD64((a64),(opus_int64)((opus_int32)(b16) * (opus_int32)(c16)))
michael@0 412
michael@0 413 /* (a32 * b32) */
michael@0 414 #define silk_SMULL(a32, b32) ((opus_int64)(a32) * /*(opus_int64)*/(b32))
michael@0 415
michael@0 416 /* Adds two signed 32-bit values in a way that can overflow, while not relying on undefined behaviour
michael@0 417 (just standard two's complement implementation-specific behaviour) */
michael@0 418 #define silk_ADD32_ovflw(a, b) ((opus_int32)((opus_uint32)(a) + (opus_uint32)(b)))
michael@0 419 /* Subtractss two signed 32-bit values in a way that can overflow, while not relying on undefined behaviour
michael@0 420 (just standard two's complement implementation-specific behaviour) */
michael@0 421 #define silk_SUB32_ovflw(a, b) ((opus_int32)((opus_uint32)(a) - (opus_uint32)(b)))
michael@0 422
michael@0 423 /* Multiply-accumulate macros that allow overflow in the addition (ie, no asserts in debug mode) */
michael@0 424 #define silk_MLA_ovflw(a32, b32, c32) silk_ADD32_ovflw((a32), (opus_uint32)(b32) * (opus_uint32)(c32))
michael@0 425 #define silk_SMLABB_ovflw(a32, b32, c32) (silk_ADD32_ovflw((a32) , ((opus_int32)((opus_int16)(b32))) * (opus_int32)((opus_int16)(c32))))
michael@0 426
michael@0 427 #define silk_DIV32_16(a32, b16) ((opus_int32)((a32) / (b16)))
michael@0 428 #define silk_DIV32(a32, b32) ((opus_int32)((a32) / (b32)))
michael@0 429
michael@0 430 /* These macros enables checking for overflow in silk_API_Debug.h*/
michael@0 431 #define silk_ADD16(a, b) ((a) + (b))
michael@0 432 #define silk_ADD32(a, b) ((a) + (b))
michael@0 433 #define silk_ADD64(a, b) ((a) + (b))
michael@0 434
michael@0 435 #define silk_SUB16(a, b) ((a) - (b))
michael@0 436 #define silk_SUB32(a, b) ((a) - (b))
michael@0 437 #define silk_SUB64(a, b) ((a) - (b))
michael@0 438
michael@0 439 #define silk_SAT8(a) ((a) > silk_int8_MAX ? silk_int8_MAX : \
michael@0 440 ((a) < silk_int8_MIN ? silk_int8_MIN : (a)))
michael@0 441 #define silk_SAT16(a) ((a) > silk_int16_MAX ? silk_int16_MAX : \
michael@0 442 ((a) < silk_int16_MIN ? silk_int16_MIN : (a)))
michael@0 443 #define silk_SAT32(a) ((a) > silk_int32_MAX ? silk_int32_MAX : \
michael@0 444 ((a) < silk_int32_MIN ? silk_int32_MIN : (a)))
michael@0 445
michael@0 446 #define silk_CHECK_FIT8(a) (a)
michael@0 447 #define silk_CHECK_FIT16(a) (a)
michael@0 448 #define silk_CHECK_FIT32(a) (a)
michael@0 449
michael@0 450 #define silk_ADD_SAT16(a, b) (opus_int16)silk_SAT16( silk_ADD32( (opus_int32)(a), (b) ) )
michael@0 451 #define silk_ADD_SAT64(a, b) ((((a) + (b)) & 0x8000000000000000LL) == 0 ? \
michael@0 452 ((((a) & (b)) & 0x8000000000000000LL) != 0 ? silk_int64_MIN : (a)+(b)) : \
michael@0 453 ((((a) | (b)) & 0x8000000000000000LL) == 0 ? silk_int64_MAX : (a)+(b)) )
michael@0 454
michael@0 455 #define silk_SUB_SAT16(a, b) (opus_int16)silk_SAT16( silk_SUB32( (opus_int32)(a), (b) ) )
michael@0 456 #define silk_SUB_SAT64(a, b) ((((a)-(b)) & 0x8000000000000000LL) == 0 ? \
michael@0 457 (( (a) & ((b)^0x8000000000000000LL) & 0x8000000000000000LL) ? silk_int64_MIN : (a)-(b)) : \
michael@0 458 ((((a)^0x8000000000000000LL) & (b) & 0x8000000000000000LL) ? silk_int64_MAX : (a)-(b)) )
michael@0 459
michael@0 460 /* Saturation for positive input values */
michael@0 461 #define silk_POS_SAT32(a) ((a) > silk_int32_MAX ? silk_int32_MAX : (a))
michael@0 462
michael@0 463 /* Add with saturation for positive input values */
michael@0 464 #define silk_ADD_POS_SAT8(a, b) ((((a)+(b)) & 0x80) ? silk_int8_MAX : ((a)+(b)))
michael@0 465 #define silk_ADD_POS_SAT16(a, b) ((((a)+(b)) & 0x8000) ? silk_int16_MAX : ((a)+(b)))
michael@0 466 #define silk_ADD_POS_SAT32(a, b) ((((a)+(b)) & 0x80000000) ? silk_int32_MAX : ((a)+(b)))
michael@0 467 #define silk_ADD_POS_SAT64(a, b) ((((a)+(b)) & 0x8000000000000000LL) ? silk_int64_MAX : ((a)+(b)))
michael@0 468
michael@0 469 #define silk_LSHIFT8(a, shift) ((opus_int8)((opus_uint8)(a)<<(shift))) /* shift >= 0, shift < 8 */
michael@0 470 #define silk_LSHIFT16(a, shift) ((opus_int16)((opus_uint16)(a)<<(shift))) /* shift >= 0, shift < 16 */
michael@0 471 #define silk_LSHIFT32(a, shift) ((opus_int32)((opus_uint32)(a)<<(shift))) /* shift >= 0, shift < 32 */
michael@0 472 #define silk_LSHIFT64(a, shift) ((opus_int64)((opus_uint64)(a)<<(shift))) /* shift >= 0, shift < 64 */
michael@0 473 #define silk_LSHIFT(a, shift) silk_LSHIFT32(a, shift) /* shift >= 0, shift < 32 */
michael@0 474
michael@0 475 #define silk_RSHIFT8(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 8 */
michael@0 476 #define silk_RSHIFT16(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 16 */
michael@0 477 #define silk_RSHIFT32(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 32 */
michael@0 478 #define silk_RSHIFT64(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 64 */
michael@0 479 #define silk_RSHIFT(a, shift) silk_RSHIFT32(a, shift) /* shift >= 0, shift < 32 */
michael@0 480
michael@0 481 /* saturates before shifting */
michael@0 482 #define silk_LSHIFT_SAT32(a, shift) (silk_LSHIFT32( silk_LIMIT( (a), silk_RSHIFT32( silk_int32_MIN, (shift) ), \
michael@0 483 silk_RSHIFT32( silk_int32_MAX, (shift) ) ), (shift) ))
michael@0 484
michael@0 485 #define silk_LSHIFT_ovflw(a, shift) ((opus_int32)((opus_uint32)(a) << (shift))) /* shift >= 0, allowed to overflow */
michael@0 486 #define silk_LSHIFT_uint(a, shift) ((a) << (shift)) /* shift >= 0 */
michael@0 487 #define silk_RSHIFT_uint(a, shift) ((a) >> (shift)) /* shift >= 0 */
michael@0 488
michael@0 489 #define silk_ADD_LSHIFT(a, b, shift) ((a) + silk_LSHIFT((b), (shift))) /* shift >= 0 */
michael@0 490 #define silk_ADD_LSHIFT32(a, b, shift) silk_ADD32((a), silk_LSHIFT32((b), (shift))) /* shift >= 0 */
michael@0 491 #define silk_ADD_LSHIFT_uint(a, b, shift) ((a) + silk_LSHIFT_uint((b), (shift))) /* shift >= 0 */
michael@0 492 #define silk_ADD_RSHIFT(a, b, shift) ((a) + silk_RSHIFT((b), (shift))) /* shift >= 0 */
michael@0 493 #define silk_ADD_RSHIFT32(a, b, shift) silk_ADD32((a), silk_RSHIFT32((b), (shift))) /* shift >= 0 */
michael@0 494 #define silk_ADD_RSHIFT_uint(a, b, shift) ((a) + silk_RSHIFT_uint((b), (shift))) /* shift >= 0 */
michael@0 495 #define silk_SUB_LSHIFT32(a, b, shift) silk_SUB32((a), silk_LSHIFT32((b), (shift))) /* shift >= 0 */
michael@0 496 #define silk_SUB_RSHIFT32(a, b, shift) silk_SUB32((a), silk_RSHIFT32((b), (shift))) /* shift >= 0 */
michael@0 497
michael@0 498 /* Requires that shift > 0 */
michael@0 499 #define silk_RSHIFT_ROUND(a, shift) ((shift) == 1 ? ((a) >> 1) + ((a) & 1) : (((a) >> ((shift) - 1)) + 1) >> 1)
michael@0 500 #define silk_RSHIFT_ROUND64(a, shift) ((shift) == 1 ? ((a) >> 1) + ((a) & 1) : (((a) >> ((shift) - 1)) + 1) >> 1)
michael@0 501
michael@0 502 /* Number of rightshift required to fit the multiplication */
michael@0 503 #define silk_NSHIFT_MUL_32_32(a, b) ( -(31- (32-silk_CLZ32(silk_abs(a)) + (32-silk_CLZ32(silk_abs(b))))) )
michael@0 504 #define silk_NSHIFT_MUL_16_16(a, b) ( -(15- (16-silk_CLZ16(silk_abs(a)) + (16-silk_CLZ16(silk_abs(b))))) )
michael@0 505
michael@0 506
michael@0 507 #define silk_min(a, b) (((a) < (b)) ? (a) : (b))
michael@0 508 #define silk_max(a, b) (((a) > (b)) ? (a) : (b))
michael@0 509
michael@0 510 /* Macro to convert floating-point constants to fixed-point */
michael@0 511 #define SILK_FIX_CONST( C, Q ) ((opus_int32)((C) * ((opus_int64)1 << (Q)) + 0.5))
michael@0 512
michael@0 513 /* silk_min() versions with typecast in the function call */
michael@0 514 static OPUS_INLINE opus_int silk_min_int(opus_int a, opus_int b)
michael@0 515 {
michael@0 516 return (((a) < (b)) ? (a) : (b));
michael@0 517 }
michael@0 518 static OPUS_INLINE opus_int16 silk_min_16(opus_int16 a, opus_int16 b)
michael@0 519 {
michael@0 520 return (((a) < (b)) ? (a) : (b));
michael@0 521 }
michael@0 522 static OPUS_INLINE opus_int32 silk_min_32(opus_int32 a, opus_int32 b)
michael@0 523 {
michael@0 524 return (((a) < (b)) ? (a) : (b));
michael@0 525 }
michael@0 526 static OPUS_INLINE opus_int64 silk_min_64(opus_int64 a, opus_int64 b)
michael@0 527 {
michael@0 528 return (((a) < (b)) ? (a) : (b));
michael@0 529 }
michael@0 530
michael@0 531 /* silk_min() versions with typecast in the function call */
michael@0 532 static OPUS_INLINE opus_int silk_max_int(opus_int a, opus_int b)
michael@0 533 {
michael@0 534 return (((a) > (b)) ? (a) : (b));
michael@0 535 }
michael@0 536 static OPUS_INLINE opus_int16 silk_max_16(opus_int16 a, opus_int16 b)
michael@0 537 {
michael@0 538 return (((a) > (b)) ? (a) : (b));
michael@0 539 }
michael@0 540 static OPUS_INLINE opus_int32 silk_max_32(opus_int32 a, opus_int32 b)
michael@0 541 {
michael@0 542 return (((a) > (b)) ? (a) : (b));
michael@0 543 }
michael@0 544 static OPUS_INLINE opus_int64 silk_max_64(opus_int64 a, opus_int64 b)
michael@0 545 {
michael@0 546 return (((a) > (b)) ? (a) : (b));
michael@0 547 }
michael@0 548
michael@0 549 #define silk_LIMIT( a, limit1, limit2) ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
michael@0 550 : ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))))
michael@0 551
michael@0 552 #define silk_LIMIT_int silk_LIMIT
michael@0 553 #define silk_LIMIT_16 silk_LIMIT
michael@0 554 #define silk_LIMIT_32 silk_LIMIT
michael@0 555
michael@0 556 #define silk_abs(a) (((a) > 0) ? (a) : -(a)) /* Be careful, silk_abs returns wrong when input equals to silk_intXX_MIN */
michael@0 557 #define silk_abs_int(a) (((a) ^ ((a) >> (8 * sizeof(a) - 1))) - ((a) >> (8 * sizeof(a) - 1)))
michael@0 558 #define silk_abs_int32(a) (((a) ^ ((a) >> 31)) - ((a) >> 31))
michael@0 559 #define silk_abs_int64(a) (((a) > 0) ? (a) : -(a))
michael@0 560
michael@0 561 #define silk_sign(a) ((a) > 0 ? 1 : ( (a) < 0 ? -1 : 0 ))
michael@0 562
michael@0 563 /* PSEUDO-RANDOM GENERATOR */
michael@0 564 /* Make sure to store the result as the seed for the next call (also in between */
michael@0 565 /* frames), otherwise result won't be random at all. When only using some of the */
michael@0 566 /* bits, take the most significant bits by right-shifting. */
michael@0 567 #define silk_RAND(seed) (silk_MLA_ovflw(907633515, (seed), 196314165))
michael@0 568
michael@0 569 /* Add some multiplication functions that can be easily mapped to ARM. */
michael@0 570
michael@0 571 /* silk_SMMUL: Signed top word multiply.
michael@0 572 ARMv6 2 instruction cycles.
michael@0 573 ARMv3M+ 3 instruction cycles. use SMULL and ignore LSB registers.(except xM)*/
michael@0 574 /*#define silk_SMMUL(a32, b32) (opus_int32)silk_RSHIFT(silk_SMLAL(silk_SMULWB((a32), (b32)), (a32), silk_RSHIFT_ROUND((b32), 16)), 16)*/
michael@0 575 /* the following seems faster on x86 */
michael@0 576 #define silk_SMMUL(a32, b32) (opus_int32)silk_RSHIFT64(silk_SMULL((a32), (b32)), 32)
michael@0 577
michael@0 578 #include "Inlines.h"
michael@0 579 #include "MacroCount.h"
michael@0 580 #include "MacroDebug.h"
michael@0 581
michael@0 582 #ifdef OPUS_ARM_INLINE_ASM
michael@0 583 #include "arm/SigProc_FIX_armv4.h"
michael@0 584 #endif
michael@0 585
michael@0 586 #ifdef OPUS_ARM_INLINE_EDSP
michael@0 587 #include "arm/SigProc_FIX_armv5e.h"
michael@0 588 #endif
michael@0 589
michael@0 590 #ifdef __cplusplus
michael@0 591 }
michael@0 592 #endif
michael@0 593
michael@0 594 #endif /* SILK_SIGPROC_FIX_H */

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