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 #include "cpu_support.h"
39
40 #if defined(__SSE__) && !defined(FIXED_POINT)
41 #include "x86/pitch_sse.h"
42 #endif
43
44 #if defined(OPUS_ARM_ASM) && defined(FIXED_POINT)
45 # include "arm/pitch_arm.h"
46 #endif
47
48 void pitch_downsample(celt_sig * OPUS_RESTRICT x[], opus_val16 * OPUS_RESTRICT x_lp,
49 int len, int C, int arch);
50
51 void pitch_search(const opus_val16 * OPUS_RESTRICT x_lp, opus_val16 * OPUS_RESTRICT y,
52 int len, int max_pitch, int *pitch, int arch);
53
54 opus_val16 remove_doubling(opus_val16 *x, int maxperiod, int minperiod,
55 int N, int *T0, int prev_period, opus_val16 prev_gain);
56
57 /* OPT: This is the kernel you really want to optimize. It gets used a lot
58 by the prefilter and by the PLC. */
59 #ifndef OVERRIDE_XCORR_KERNEL
xcorr_kernel(const opus_val16 * x,const opus_val16 * y,opus_val32 sum[4],int len)60 static OPUS_INLINE void xcorr_kernel(const opus_val16 * x, const opus_val16 * y, opus_val32 sum[4], int len)
61 {
62 int j;
63 opus_val16 y_0, y_1, y_2, y_3;
64 celt_assert(len>=3);
65 y_3=0; /* gcc doesn't realize that y_3 can't be used uninitialized */
66 y_0=*y++;
67 y_1=*y++;
68 y_2=*y++;
69 for (j=0;j<len-3;j+=4)
70 {
71 opus_val16 tmp;
72 tmp = *x++;
73 y_3=*y++;
74 sum[0] = MAC16_16(sum[0],tmp,y_0);
75 sum[1] = MAC16_16(sum[1],tmp,y_1);
76 sum[2] = MAC16_16(sum[2],tmp,y_2);
77 sum[3] = MAC16_16(sum[3],tmp,y_3);
78 tmp=*x++;
79 y_0=*y++;
80 sum[0] = MAC16_16(sum[0],tmp,y_1);
81 sum[1] = MAC16_16(sum[1],tmp,y_2);
82 sum[2] = MAC16_16(sum[2],tmp,y_3);
83 sum[3] = MAC16_16(sum[3],tmp,y_0);
84 tmp=*x++;
85 y_1=*y++;
86 sum[0] = MAC16_16(sum[0],tmp,y_2);
87 sum[1] = MAC16_16(sum[1],tmp,y_3);
88 sum[2] = MAC16_16(sum[2],tmp,y_0);
89 sum[3] = MAC16_16(sum[3],tmp,y_1);
90 tmp=*x++;
91 y_2=*y++;
92 sum[0] = MAC16_16(sum[0],tmp,y_3);
93 sum[1] = MAC16_16(sum[1],tmp,y_0);
94 sum[2] = MAC16_16(sum[2],tmp,y_1);
95 sum[3] = MAC16_16(sum[3],tmp,y_2);
96 }
97 if (j++<len)
98 {
99 opus_val16 tmp = *x++;
100 y_3=*y++;
101 sum[0] = MAC16_16(sum[0],tmp,y_0);
102 sum[1] = MAC16_16(sum[1],tmp,y_1);
103 sum[2] = MAC16_16(sum[2],tmp,y_2);
104 sum[3] = MAC16_16(sum[3],tmp,y_3);
105 }
106 if (j++<len)
107 {
108 opus_val16 tmp=*x++;
109 y_0=*y++;
110 sum[0] = MAC16_16(sum[0],tmp,y_1);
111 sum[1] = MAC16_16(sum[1],tmp,y_2);
112 sum[2] = MAC16_16(sum[2],tmp,y_3);
113 sum[3] = MAC16_16(sum[3],tmp,y_0);
114 }
115 if (j<len)
116 {
117 opus_val16 tmp=*x++;
118 y_1=*y++;
119 sum[0] = MAC16_16(sum[0],tmp,y_2);
120 sum[1] = MAC16_16(sum[1],tmp,y_3);
121 sum[2] = MAC16_16(sum[2],tmp,y_0);
122 sum[3] = MAC16_16(sum[3],tmp,y_1);
123 }
124 }
125 #endif /* OVERRIDE_XCORR_KERNEL */
126
127 #ifndef OVERRIDE_DUAL_INNER_PROD
dual_inner_prod(const opus_val16 * x,const opus_val16 * y01,const opus_val16 * y02,int N,opus_val32 * xy1,opus_val32 * xy2)128 static OPUS_INLINE void dual_inner_prod(const opus_val16 *x, const opus_val16 *y01, const opus_val16 *y02,
129 int N, opus_val32 *xy1, opus_val32 *xy2)
130 {
131 int i;
132 opus_val32 xy01=0;
133 opus_val32 xy02=0;
134 for (i=0;i<N;i++)
135 {
136 xy01 = MAC16_16(xy01, x[i], y01[i]);
137 xy02 = MAC16_16(xy02, x[i], y02[i]);
138 }
139 *xy1 = xy01;
140 *xy2 = xy02;
141 }
142 #endif
143
144 #ifdef FIXED_POINT
145 opus_val32
146 #else
147 void
148 #endif
149 celt_pitch_xcorr_c(const opus_val16 *_x, const opus_val16 *_y,
150 opus_val32 *xcorr, int len, int max_pitch);
151
152 #if !defined(OVERRIDE_PITCH_XCORR)
153 /*Is run-time CPU detection enabled on this platform?*/
154 # if defined(OPUS_HAVE_RTCD)
155 extern
156 # if defined(FIXED_POINT)
157 opus_val32
158 # else
159 void
160 # endif
161 (*const CELT_PITCH_XCORR_IMPL[OPUS_ARCHMASK+1])(const opus_val16 *,
162 const opus_val16 *, opus_val32 *, int, int);
163
164 # define celt_pitch_xcorr(_x, _y, xcorr, len, max_pitch, arch) \
165 ((*CELT_PITCH_XCORR_IMPL[(arch)&OPUS_ARCHMASK])(_x, _y, \
166 xcorr, len, max_pitch))
167 # else
168 # define celt_pitch_xcorr(_x, _y, xcorr, len, max_pitch, arch) \
169 ((void)(arch),celt_pitch_xcorr_c(_x, _y, xcorr, len, max_pitch))
170 # endif
171 #endif
172
173 #endif
174