1/* 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include "webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_estimator.h" 12 13void WebRtcIsacfix_PitchFilterCore(int loopNumber, 14 int16_t gain, 15 int index, 16 int16_t sign, 17 int16_t* inputState, 18 int16_t* outputBuf2, 19 const int16_t* coefficient, 20 int16_t* inputBuf, 21 int16_t* outputBuf, 22 int* index2) { 23 int ind2t = *index2; 24 int i = 0; 25 int16_t* out2_pos2 = &outputBuf2[PITCH_BUFFSIZE - (index + 2)] + ind2t; 26 int32_t w1, w2, w3, w4, w5, gain32, sign32; 27 int32_t coef1, coef2, coef3, coef4, coef5 = 0; 28 // Define damp factors as int32_t (pair of int16_t) 29 int32_t kDampF0 = 0x0000F70A; 30 int32_t kDampF1 = 0x51EC2000; 31 int32_t kDampF2 = 0xF70A2000; 32 int16_t* input1 = inputBuf + ind2t; 33 int16_t* output1 = outputBuf + ind2t; 34 int16_t* output2 = outputBuf2 + ind2t + PITCH_BUFFSIZE; 35 36 // Load coefficients outside the loop and sign-extend gain and sign 37 __asm __volatile ( 38 ".set push \n\t" 39 ".set noreorder \n\t" 40 "lwl %[coef1], 3(%[coefficient]) \n\t" 41 "lwl %[coef2], 7(%[coefficient]) \n\t" 42 "lwl %[coef3], 11(%[coefficient]) \n\t" 43 "lwl %[coef4], 15(%[coefficient]) \n\t" 44 "lwr %[coef1], 0(%[coefficient]) \n\t" 45 "lwr %[coef2], 4(%[coefficient]) \n\t" 46 "lwr %[coef3], 8(%[coefficient]) \n\t" 47 "lwr %[coef4], 12(%[coefficient]) \n\t" 48 "lhu %[coef5], 16(%[coefficient]) \n\t" 49 "seh %[gain32], %[gain] \n\t" 50 "seh %[sign32], %[sign] \n\t" 51 ".set pop \n\t" 52 : [coef1] "=&r" (coef1), [coef2] "=&r" (coef2), [coef3] "=&r" (coef3), 53 [coef4] "=&r" (coef4), [coef5] "=&r" (coef5), [gain32] "=&r" (gain32), 54 [sign32] "=&r" (sign32) 55 : [coefficient] "r" (coefficient), [gain] "r" (gain), 56 [sign] "r" (sign) 57 : "memory" 58 ); 59 60 for (i = 0; i < loopNumber; i++) { 61 __asm __volatile ( 62 ".set push \n\t" 63 ".set noreorder \n\t" 64 // Filter to get fractional pitch 65 "li %[w1], 8192 \n\t" 66 "mtlo %[w1] \n\t" 67 "mthi $0 \n\t" 68 "lwl %[w1], 3(%[out2_pos2]) \n\t" 69 "lwl %[w2], 7(%[out2_pos2]) \n\t" 70 "lwl %[w3], 11(%[out2_pos2]) \n\t" 71 "lwl %[w4], 15(%[out2_pos2]) \n\t" 72 "lwr %[w1], 0(%[out2_pos2]) \n\t" 73 "lwr %[w2], 4(%[out2_pos2]) \n\t" 74 "lwr %[w3], 8(%[out2_pos2]) \n\t" 75 "lwr %[w4], 12(%[out2_pos2]) \n\t" 76 "lhu %[w5], 16(%[out2_pos2]) \n\t" 77 "dpa.w.ph $ac0, %[w1], %[coef1] \n\t" 78 "dpa.w.ph $ac0, %[w2], %[coef2] \n\t" 79 "dpa.w.ph $ac0, %[w3], %[coef3] \n\t" 80 "dpa.w.ph $ac0, %[w4], %[coef4] \n\t" 81 "dpa.w.ph $ac0, %[w5], %[coef5] \n\t" 82 "addiu %[out2_pos2], %[out2_pos2], 2 \n\t" 83 "mthi $0, $ac1 \n\t" 84 "lwl %[w2], 3(%[inputState]) \n\t" 85 "lwl %[w3], 7(%[inputState]) \n\t" 86 // Fractional pitch shift & saturation 87 "extr_s.h %[w1], $ac0, 14 \n\t" 88 "li %[w4], 16384 \n\t" 89 "lwr %[w2], 0(%[inputState]) \n\t" 90 "lwr %[w3], 4(%[inputState]) \n\t" 91 "mtlo %[w4], $ac1 \n\t" 92 // Shift low pass filter state 93 "swl %[w2], 5(%[inputState]) \n\t" 94 "swl %[w3], 9(%[inputState]) \n\t" 95 "mul %[w1], %[gain32], %[w1] \n\t" 96 "swr %[w2], 2(%[inputState]) \n\t" 97 "swr %[w3], 6(%[inputState]) \n\t" 98 // Low pass filter accumulation 99 "dpa.w.ph $ac1, %[kDampF1], %[w2] \n\t" 100 "dpa.w.ph $ac1, %[kDampF2], %[w3] \n\t" 101 "lh %[w4], 0(%[input1]) \n\t" 102 "addiu %[input1], %[input1], 2 \n\t" 103 "shra_r.w %[w1], %[w1], 12 \n\t" 104 "sh %[w1], 0(%[inputState]) \n\t" 105 "dpa.w.ph $ac1, %[kDampF0], %[w1] \n\t" 106 // Low pass filter shift & saturation 107 "extr_s.h %[w2], $ac1, 15 \n\t" 108 "mul %[w2], %[w2], %[sign32] \n\t" 109 // Buffer update 110 "subu %[w2], %[w4], %[w2] \n\t" 111 "shll_s.w %[w2], %[w2], 16 \n\t" 112 "sra %[w2], %[w2], 16 \n\t" 113 "sh %[w2], 0(%[output1]) \n\t" 114 "addu %[w2], %[w2], %[w4] \n\t" 115 "shll_s.w %[w2], %[w2], 16 \n\t" 116 "addiu %[output1], %[output1], 2 \n\t" 117 "sra %[w2], %[w2], 16 \n\t" 118 "sh %[w2], 0(%[output2]) \n\t" 119 "addiu %[output2], %[output2], 2 \n\t" 120 ".set pop \n\t" 121 : [w1] "=&r" (w1), [w2] "=&r" (w2), [w3] "=&r" (w3), [w4] "=&r" (w4), 122 [w5] "=&r" (w5), [input1] "+r" (input1), [out2_pos2] "+r" (out2_pos2), 123 [output1] "+r" (output1), [output2] "+r" (output2) 124 : [coefficient] "r" (coefficient), [inputState] "r" (inputState), 125 [gain32] "r" (gain32), [sign32] "r" (sign32), [kDampF0] "r" (kDampF0), 126 [kDampF1] "r" (kDampF1), [kDampF2] "r" (kDampF2), 127 [coef1] "r" (coef1), [coef2] "r" (coef2), [coef3] "r" (coef3), 128 [coef4] "r" (coef4), [coef5] "r" (coef5) 129 : "hi", "lo", "$ac1hi", "$ac1lo", "memory" 130 ); 131 } 132 (*index2) += loopNumber; 133} 134