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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/libspeex/ltp.h | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'lib/rbcodec/codecs/libspeex/ltp.h')
-rw-r--r-- | lib/rbcodec/codecs/libspeex/ltp.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspeex/ltp.h b/lib/rbcodec/codecs/libspeex/ltp.h new file mode 100644 index 0000000000..872f072e4e --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/ltp.h | |||
@@ -0,0 +1,141 @@ | |||
1 | /* Copyright (C) 2002 Jean-Marc Valin */ | ||
2 | /** | ||
3 | @file ltp.h | ||
4 | @brief Long-Term Prediction functions | ||
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 | #include "speex/speex_bits.h" | ||
36 | #include "arch.h" | ||
37 | |||
38 | /** LTP parameters. */ | ||
39 | typedef struct { | ||
40 | const signed char *gain_cdbk; | ||
41 | int gain_bits; | ||
42 | int pitch_bits; | ||
43 | } ltp_params; | ||
44 | |||
45 | #ifdef FIXED_POINT | ||
46 | #define gain_3tap_to_1tap(g) (ABS(g[1]) + (g[0]>0 ? g[0] : -SHR16(g[0],1)) + (g[2]>0 ? g[2] : -SHR16(g[2],1))) | ||
47 | #else | ||
48 | #define gain_3tap_to_1tap(g) (ABS(g[1]) + (g[0]>0 ? g[0] : -.5*g[0]) + (g[2]>0 ? g[2] : -.5*g[2])) | ||
49 | #endif | ||
50 | |||
51 | spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len); | ||
52 | void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack); | ||
53 | |||
54 | void open_loop_nbest_pitch(spx_word16_t *sw, int start, int end, int len, int *pitch, spx_word16_t *gain, int N, char *stack); | ||
55 | |||
56 | |||
57 | /** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */ | ||
58 | int pitch_search_3tap( | ||
59 | spx_word16_t target[], /* Target vector */ | ||
60 | spx_word16_t *sw, | ||
61 | spx_coef_t ak[], /* LPCs for this subframe */ | ||
62 | spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */ | ||
63 | spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */ | ||
64 | spx_sig_t exc[], /* Overlapping codebook */ | ||
65 | const void *par, | ||
66 | int start, /* Smallest pitch value allowed */ | ||
67 | int end, /* Largest pitch value allowed */ | ||
68 | spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */ | ||
69 | int p, /* Number of LPC coeffs */ | ||
70 | int nsf, /* Number of samples in subframe */ | ||
71 | SpeexBits *bits, | ||
72 | char *stack, | ||
73 | spx_word16_t *exc2, | ||
74 | spx_word16_t *r, | ||
75 | int complexity, | ||
76 | int cdbk_offset, | ||
77 | int plc_tuning, | ||
78 | spx_word32_t *cumul_gain | ||
79 | ); | ||
80 | |||
81 | /*Unquantize adaptive codebook and update pitch contribution*/ | ||
82 | void pitch_unquant_3tap( | ||
83 | spx_word16_t exc[], /* Input excitation */ | ||
84 | spx_word32_t exc_out[], /* Output excitation */ | ||
85 | int start, /* Smallest pitch value allowed */ | ||
86 | int end, /* Largest pitch value allowed */ | ||
87 | spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */ | ||
88 | const void *par, | ||
89 | int nsf, /* Number of samples in subframe */ | ||
90 | int *pitch_val, | ||
91 | spx_word16_t *gain_val, | ||
92 | SpeexBits *bits, | ||
93 | char *stack, | ||
94 | int lost, | ||
95 | int subframe_offset, | ||
96 | spx_word16_t last_pitch_gain, | ||
97 | int cdbk_offset | ||
98 | ); | ||
99 | |||
100 | /** Forced pitch delay and gain */ | ||
101 | int forced_pitch_quant( | ||
102 | spx_word16_t target[], /* Target vector */ | ||
103 | spx_word16_t *sw, | ||
104 | spx_coef_t ak[], /* LPCs for this subframe */ | ||
105 | spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */ | ||
106 | spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */ | ||
107 | spx_sig_t exc[], /* Excitation */ | ||
108 | const void *par, | ||
109 | int start, /* Smallest pitch value allowed */ | ||
110 | int end, /* Largest pitch value allowed */ | ||
111 | spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */ | ||
112 | int p, /* Number of LPC coeffs */ | ||
113 | int nsf, /* Number of samples in subframe */ | ||
114 | SpeexBits *bits, | ||
115 | char *stack, | ||
116 | spx_word16_t *exc2, | ||
117 | spx_word16_t *r, | ||
118 | int complexity, | ||
119 | int cdbk_offset, | ||
120 | int plc_tuning, | ||
121 | spx_word32_t *cumul_gain | ||
122 | ); | ||
123 | |||
124 | /** Unquantize forced pitch delay and gain */ | ||
125 | void forced_pitch_unquant( | ||
126 | spx_word16_t exc[], /* Input excitation */ | ||
127 | spx_word32_t exc_out[], /* Output excitation */ | ||
128 | int start, /* Smallest pitch value allowed */ | ||
129 | int end, /* Largest pitch value allowed */ | ||
130 | spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */ | ||
131 | const void *par, | ||
132 | int nsf, /* Number of samples in subframe */ | ||
133 | int *pitch_val, | ||
134 | spx_word16_t *gain_val, | ||
135 | SpeexBits *bits, | ||
136 | char *stack, | ||
137 | int lost, | ||
138 | int subframe_offset, | ||
139 | spx_word16_t last_pitch_gain, | ||
140 | int cdbk_offset | ||
141 | ); | ||