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Diffstat (limited to 'lib/rbcodec/codecs/libspeex/filters.h')
-rw-r--r-- | lib/rbcodec/codecs/libspeex/filters.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspeex/filters.h b/lib/rbcodec/codecs/libspeex/filters.h new file mode 100644 index 0000000000..e3a5980e70 --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/filters.h | |||
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1 | /* Copyright (C) 2002 Jean-Marc Valin */ | ||
2 | /** | ||
3 | @file filters.h | ||
4 | @brief Various analysis/synthesis filters | ||
5 | */ | ||
6 | /* | ||
7 | Redistribution and use in source and binary forms, with or without | ||
8 | modification, are permitted provided that the following conditions | ||
9 | are met: | ||
10 | |||
11 | - Redistributions of source code must retain the above copyright | ||
12 | notice, this list of conditions and the following disclaimer. | ||
13 | |||
14 | - Redistributions in binary form must reproduce the above copyright | ||
15 | notice, this list of conditions and the following disclaimer in the | ||
16 | documentation and/or other materials provided with the distribution. | ||
17 | |||
18 | - Neither the name of the Xiph.org Foundation nor the names of its | ||
19 | contributors may be used to endorse or promote products derived from | ||
20 | this software without specific prior written permission. | ||
21 | |||
22 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
23 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
24 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
25 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR | ||
26 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
27 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
28 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
29 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
30 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
31 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
32 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
33 | */ | ||
34 | |||
35 | #ifndef FILTERS_H | ||
36 | #define FILTERS_H | ||
37 | |||
38 | #include "arch.h" | ||
39 | |||
40 | spx_word16_t compute_rms(const spx_sig_t *x, int len); | ||
41 | spx_word16_t compute_rms16(const spx_word16_t *x, int len); | ||
42 | void signal_mul(const spx_sig_t *x, spx_sig_t *y, spx_word32_t scale, int len); | ||
43 | void signal_div(const spx_word16_t *x, spx_word16_t *y, spx_word32_t scale, int len); | ||
44 | |||
45 | #ifdef FIXED_POINT | ||
46 | |||
47 | int normalize16(const spx_sig_t *x, spx_word16_t *y, spx_sig_t max_scale, int len); | ||
48 | |||
49 | #endif | ||
50 | |||
51 | |||
52 | #define HIGHPASS_NARROWBAND 0 | ||
53 | #define HIGHPASS_WIDEBAND 2 | ||
54 | #define HIGHPASS_INPUT 0 | ||
55 | #define HIGHPASS_OUTPUT 1 | ||
56 | #define HIGHPASS_IRS 4 | ||
57 | |||
58 | void highpass(const spx_word16_t *x, spx_word16_t *y, int len, int filtID, spx_mem_t *mem); | ||
59 | |||
60 | |||
61 | void qmf_decomp(const spx_word16_t *xx, const spx_word16_t *aa, spx_word16_t *, spx_word16_t *y2, int N, int M, spx_word16_t *mem, char *stack); | ||
62 | void qmf_synth(const spx_word16_t *x1, const spx_word16_t *x2, const spx_word16_t *a, spx_word16_t *y, int N, int M, spx_word16_t *mem1, spx_word16_t *mem2, char *stack); | ||
63 | |||
64 | void filter_mem16(const spx_word16_t *x, const spx_coef_t *num, const spx_coef_t *den, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack); | ||
65 | void iir_mem16(const spx_word16_t *x, const spx_coef_t *den, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack); | ||
66 | void fir_mem16(const spx_word16_t *x, const spx_coef_t *num, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack); | ||
67 | |||
68 | /* Apply bandwidth expansion on LPC coef */ | ||
69 | void bw_lpc(spx_word16_t , const spx_coef_t *lpc_in, spx_coef_t *lpc_out, int order); | ||
70 | void sanitize_values32(spx_word32_t *vec, spx_word32_t min_val, spx_word32_t max_val, int len); | ||
71 | |||
72 | |||
73 | void syn_percep_zero16(const spx_word16_t *xx, const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack); | ||
74 | void residue_percep_zero16(const spx_word16_t *xx, const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack); | ||
75 | |||
76 | void compute_impulse_response(const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack); | ||
77 | |||
78 | void multicomb( | ||
79 | spx_word16_t *exc, /*decoded excitation*/ | ||
80 | spx_word16_t *new_exc, /*enhanced excitation*/ | ||
81 | spx_coef_t *ak, /*LPC filter coefs*/ | ||
82 | int p, /*LPC order*/ | ||
83 | int nsf, /*sub-frame size*/ | ||
84 | int pitch, /*pitch period*/ | ||
85 | int max_pitch, /*pitch gain (3-tap)*/ | ||
86 | spx_word16_t comb_gain, /*gain of comb filter*/ | ||
87 | char *stack | ||
88 | ); | ||
89 | |||
90 | #endif | ||