1 /* Copyright (c) 2007-2008 CSIRO 2 Copyright (c) 2007-2009 Xiph.Org Foundation 3 Written by Jean-Marc Valin */ 4 /** 5 @file pitch.h 6 @brief Pitch analysis 7 */ 8 9 /* 10 Redistribution and use in source and binary forms, with or without 11 modification, are permitted provided that the following conditions 12 are met: 13 14 - Redistributions of source code must retain the above copyright 15 notice, this list of conditions and the following disclaimer. 16 17 - Redistributions in binary form must reproduce the above copyright 18 notice, this list of conditions and the following disclaimer in the 19 documentation and/or other materials provided with the distribution. 20 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 25 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 26 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 28 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef PITCH_H 35 #define PITCH_H 36 37 #include "modes.h" 38 39 #if defined(__SSE__) && !defined(FIXED_POINT) 40 #include "x86/pitch_sse.h" 41 #endif 42 43 void pitch_downsample(celt_sig * OPUS_RESTRICT x[], opus_val16 * OPUS_RESTRICT x_lp, 44 int len, int C); 45 46 void pitch_search(const opus_val16 * OPUS_RESTRICT x_lp, opus_val16 * OPUS_RESTRICT y, 47 int len, int max_pitch, int *pitch); 48 49 opus_val16 remove_doubling(opus_val16 *x, int maxperiod, int minperiod, 50 int N, int *T0, int prev_period, opus_val16 prev_gain); 51 52 /* OPT: This is the kernel you really want to optimize. It gets used a lot 53 by the prefilter and by the PLC. */ 54 #ifndef OVERRIDE_XCORR_KERNEL 55 static inline void xcorr_kernel(const opus_val16 * x, const opus_val16 * y, opus_val32 sum[4], int len) 56 { 57 int j; 58 opus_val16 y_0, y_1, y_2, y_3; 59 y_3=0; /* gcc doesn't realize that y_3 can't be used uninitialized */ 60 y_0=*y++; 61 y_1=*y++; 62 y_2=*y++; 63 for (j=0;j<len-3;j+=4) 64 { 65 opus_val16 tmp; 66 tmp = *x++; 67 y_3=*y++; 68 sum[0] = MAC16_16(sum[0],tmp,y_0); 69 sum[1] = MAC16_16(sum[1],tmp,y_1); 70 sum[2] = MAC16_16(sum[2],tmp,y_2); 71 sum[3] = MAC16_16(sum[3],tmp,y_3); 72 tmp=*x++; 73 y_0=*y++; 74 sum[0] = MAC16_16(sum[0],tmp,y_1); 75 sum[1] = MAC16_16(sum[1],tmp,y_2); 76 sum[2] = MAC16_16(sum[2],tmp,y_3); 77 sum[3] = MAC16_16(sum[3],tmp,y_0); 78 tmp=*x++; 79 y_1=*y++; 80 sum[0] = MAC16_16(sum[0],tmp,y_2); 81 sum[1] = MAC16_16(sum[1],tmp,y_3); 82 sum[2] = MAC16_16(sum[2],tmp,y_0); 83 sum[3] = MAC16_16(sum[3],tmp,y_1); 84 tmp=*x++; 85 y_2=*y++; 86 sum[0] = MAC16_16(sum[0],tmp,y_3); 87 sum[1] = MAC16_16(sum[1],tmp,y_0); 88 sum[2] = MAC16_16(sum[2],tmp,y_1); 89 sum[3] = MAC16_16(sum[3],tmp,y_2); 90 } 91 if (j++<len) 92 { 93 opus_val16 tmp = *x++; 94 y_3=*y++; 95 sum[0] = MAC16_16(sum[0],tmp,y_0); 96 sum[1] = MAC16_16(sum[1],tmp,y_1); 97 sum[2] = MAC16_16(sum[2],tmp,y_2); 98 sum[3] = MAC16_16(sum[3],tmp,y_3); 99 } 100 if (j++<len) 101 { 102 opus_val16 tmp=*x++; 103 y_0=*y++; 104 sum[0] = MAC16_16(sum[0],tmp,y_1); 105 sum[1] = MAC16_16(sum[1],tmp,y_2); 106 sum[2] = MAC16_16(sum[2],tmp,y_3); 107 sum[3] = MAC16_16(sum[3],tmp,y_0); 108 } 109 if (j<len) 110 { 111 opus_val16 tmp=*x++; 112 y_1=*y++; 113 sum[0] = MAC16_16(sum[0],tmp,y_2); 114 sum[1] = MAC16_16(sum[1],tmp,y_3); 115 sum[2] = MAC16_16(sum[2],tmp,y_0); 116 sum[3] = MAC16_16(sum[3],tmp,y_1); 117 } 118 } 119 #endif /* OVERRIDE_XCORR_KERNEL */ 120 121 #ifndef OVERRIDE_DUAL_INNER_PROD 122 static inline void dual_inner_prod(const opus_val16 *x, const opus_val16 *y01, const opus_val16 *y02, 123 int N, opus_val32 *xy1, opus_val32 *xy2) 124 { 125 int i; 126 opus_val32 xy01=0; 127 opus_val32 xy02=0; 128 for (i=0;i<N;i++) 129 { 130 xy01 = MAC16_16(xy01, x[i], y01[i]); 131 xy02 = MAC16_16(xy02, x[i], y02[i]); 132 } 133 *xy1 = xy01; 134 *xy2 = xy02; 135 } 136 #endif 137 138 #ifdef FIXED_POINT 139 opus_val32 140 #else 141 void 142 #endif 143 celt_pitch_xcorr(const opus_val16 *_x, const opus_val16 *_y, opus_val32 *xcorr, int len, int max_pitch); 144 145 #endif 146
