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1 /* | 1 /* |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 /****************************************************************** | 11 /****************************************************************** |
12 | 12 |
13 iLBC Speech Coder ANSI-C Source Code | 13 iLBC Speech Coder ANSI-C Source Code |
14 | 14 |
15 WebRtcIlbcfix_Window32W32.c | 15 WebRtcIlbcfix_Window32W32.c |
16 | 16 |
17 ******************************************************************/ | 17 ******************************************************************/ |
18 | 18 |
19 #include "defines.h" | 19 #include "defines.h" |
20 | 20 |
21 /*----------------------------------------------------------------* | 21 /*----------------------------------------------------------------* |
22 * window multiplication | 22 * window multiplication |
23 *---------------------------------------------------------------*/ | 23 *---------------------------------------------------------------*/ |
24 | 24 |
25 void WebRtcIlbcfix_Window32W32( | 25 void WebRtcIlbcfix_Window32W32( |
26 int32_t *z, /* Output */ | 26 int32_t *z, /* Output */ |
27 int32_t *x, /* Input (same domain as Output)*/ | 27 int32_t *x, /* Input (same domain as Output)*/ |
28 const int32_t *y, /* Q31 Window */ | 28 const int32_t *y, /* Q31 Window */ |
29 int16_t N /* length to process */ | 29 size_t N /* length to process */ |
30 ) { | 30 ) { |
31 int16_t i; | 31 size_t i; |
32 int16_t x_low, x_hi, y_low, y_hi; | 32 int16_t x_low, x_hi, y_low, y_hi; |
33 int16_t left_shifts; | 33 int16_t left_shifts; |
34 int32_t temp; | 34 int32_t temp; |
35 | 35 |
36 left_shifts = (int16_t)WebRtcSpl_NormW32(x[0]); | 36 left_shifts = (int16_t)WebRtcSpl_NormW32(x[0]); |
37 WebRtcSpl_VectorBitShiftW32(x, N, x, (int16_t)(-left_shifts)); | 37 WebRtcSpl_VectorBitShiftW32(x, N, x, (int16_t)(-left_shifts)); |
38 | 38 |
39 | 39 |
40 /* The double precision numbers use a special representation: | 40 /* The double precision numbers use a special representation: |
41 * w32 = hi<<16 + lo<<1 | 41 * w32 = hi<<16 + lo<<1 |
(...skipping 11 matching lines...) Expand all Loading... |
53 /* Calculate z by a 32 bit multiplication using both low and high from x and
y */ | 53 /* Calculate z by a 32 bit multiplication using both low and high from x and
y */ |
54 temp = ((x_hi * y_hi) << 1) + ((x_hi * y_low) >> 14); | 54 temp = ((x_hi * y_hi) << 1) + ((x_hi * y_low) >> 14); |
55 | 55 |
56 z[i] = temp + ((x_low * y_hi) >> 14); | 56 z[i] = temp + ((x_low * y_hi) >> 14); |
57 } | 57 } |
58 | 58 |
59 WebRtcSpl_VectorBitShiftW32(z, N, z, left_shifts); | 59 WebRtcSpl_VectorBitShiftW32(z, N, z, left_shifts); |
60 | 60 |
61 return; | 61 return; |
62 } | 62 } |
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