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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/libwmavoice/acelp_vectors.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/libwmavoice/acelp_vectors.h')
-rw-r--r-- | lib/rbcodec/codecs/libwmavoice/acelp_vectors.h | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libwmavoice/acelp_vectors.h b/lib/rbcodec/codecs/libwmavoice/acelp_vectors.h new file mode 100644 index 0000000000..f3bc781446 --- /dev/null +++ b/lib/rbcodec/codecs/libwmavoice/acelp_vectors.h | |||
@@ -0,0 +1,264 @@ | |||
1 | /* | ||
2 | * adaptive and fixed codebook vector operations for ACELP-based codecs | ||
3 | * | ||
4 | * Copyright (c) 2008 Vladimir Voroshilov | ||
5 | * | ||
6 | * This file is part of FFmpeg. | ||
7 | * | ||
8 | * FFmpeg is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU Lesser General Public | ||
10 | * License as published by the Free Software Foundation; either | ||
11 | * version 2.1 of the License, or (at your option) any later version. | ||
12 | * | ||
13 | * FFmpeg is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
16 | * Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with FFmpeg; if not, write to the Free Software | ||
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
21 | */ | ||
22 | |||
23 | #ifndef AVCODEC_ACELP_VECTORS_H | ||
24 | #define AVCODEC_ACELP_VECTORS_H | ||
25 | |||
26 | #include <stdint.h> | ||
27 | |||
28 | /** Sparse representation for the algebraic codebook (fixed) vector */ | ||
29 | typedef struct { | ||
30 | int n; | ||
31 | int x[10]; | ||
32 | float y[10]; | ||
33 | int no_repeat_mask; | ||
34 | int pitch_lag; | ||
35 | float pitch_fac; | ||
36 | } AMRFixed; | ||
37 | |||
38 | /** | ||
39 | * Track|Pulse| Positions | ||
40 | * ------------------------------------------------------------------------- | ||
41 | * 1 | 0 | 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 | ||
42 | * ------------------------------------------------------------------------- | ||
43 | * 2 | 1 | 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76 | ||
44 | * ------------------------------------------------------------------------- | ||
45 | * 3 | 2 | 2, 7, 12, 17, 22, 27, 32, 37, 42, 47, 52, 57, 62, 67, 72, 77 | ||
46 | * ------------------------------------------------------------------------- | ||
47 | * | ||
48 | * Table contains only first the pulse indexes. | ||
49 | * | ||
50 | * Used in G.729 @@8k, G.729 @@4.4k, AMR @@7.95k, AMR @@7.40k | ||
51 | */ | ||
52 | extern const uint8_t ff_fc_4pulses_8bits_tracks_13[16]; | ||
53 | |||
54 | /** | ||
55 | * Track|Pulse| Positions | ||
56 | * ------------------------------------------------------------------------- | ||
57 | * 4 | 3 | 3, 8, 13, 18, 23, 28, 33, 38, 43, 48, 53, 58, 63, 68, 73, 78 | ||
58 | * | | 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79 | ||
59 | * ------------------------------------------------------------------------- | ||
60 | * | ||
61 | * @remark Track in the table should be read top-to-bottom, left-to-right. | ||
62 | * | ||
63 | * Used in G.729 @@8k, G.729 @@4.4k, AMR @@7.95k, AMR @@7.40k | ||
64 | */ | ||
65 | extern const uint8_t ff_fc_4pulses_8bits_track_4[32]; | ||
66 | |||
67 | /** | ||
68 | * Track|Pulse| Positions | ||
69 | * ----------------------------------------- | ||
70 | * 1 | 0 | 1, 6, 11, 16, 21, 26, 31, 36 | ||
71 | * | | 3, 8, 13, 18, 23, 28, 33, 38 | ||
72 | * ----------------------------------------- | ||
73 | * | ||
74 | * @remark Track in the table should be read top-to-bottom, left-to-right. | ||
75 | * | ||
76 | * @note (EE) Reference G.729D code also uses gray decoding for each | ||
77 | * pulse index before looking up the value in the table. | ||
78 | * | ||
79 | * Used in G.729 @@6.4k (with gray coding), AMR @@5.9k (without gray coding) | ||
80 | */ | ||
81 | extern const uint8_t ff_fc_2pulses_9bits_track1[16]; | ||
82 | extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16]; | ||
83 | |||
84 | /** | ||
85 | * Track|Pulse| Positions | ||
86 | * ----------------------------------------- | ||
87 | * 2 | 1 | 0, 7, 14, 20, 27, 34, 1, 21 | ||
88 | * | | 2, 9, 15, 22, 29, 35, 6, 26 | ||
89 | * | | 4,10, 17, 24, 30, 37, 11, 31 | ||
90 | * | | 5,12, 19, 25, 32, 39, 16, 36 | ||
91 | * ----------------------------------------- | ||
92 | * | ||
93 | * @remark Track in the table should be read top-to-bottom, left-to-right. | ||
94 | * | ||
95 | * @note (EE.1) This table (from the reference code) does not comply with | ||
96 | * the specification. | ||
97 | * The specification contains the following table: | ||
98 | * | ||
99 | * Track|Pulse| Positions | ||
100 | * ----------------------------------------- | ||
101 | * 2 | 1 | 0, 5, 10, 15, 20, 25, 30, 35 | ||
102 | * | | 1, 6, 11, 16, 21, 26, 31, 36 | ||
103 | * | | 2, 7, 12, 17, 22, 27, 32, 37 | ||
104 | * | | 4, 9, 14, 19, 24, 29, 34, 39 | ||
105 | * | ||
106 | * ----------------------------------------- | ||
107 | * | ||
108 | * @note (EE.2) Reference G.729D code also uses gray decoding for each | ||
109 | * pulse index before looking up the value in the table. | ||
110 | * | ||
111 | * Used in G.729 @@6.4k (with gray coding) | ||
112 | */ | ||
113 | extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32]; | ||
114 | |||
115 | /** | ||
116 | * b60 hamming windowed sinc function coefficients | ||
117 | */ | ||
118 | extern const float ff_b60_sinc[61]; | ||
119 | |||
120 | /** | ||
121 | * Table of pow(0.7,n) | ||
122 | */ | ||
123 | extern const float ff_pow_0_7[10]; | ||
124 | |||
125 | /** | ||
126 | * Table of pow(0.75,n) | ||
127 | */ | ||
128 | extern const float ff_pow_0_75[10]; | ||
129 | |||
130 | /** | ||
131 | * Table of pow(0.55,n) | ||
132 | */ | ||
133 | extern const float ff_pow_0_55[10]; | ||
134 | |||
135 | /** | ||
136 | * Decode fixed-codebook vector (3.8 and D.5.8 of G.729, 5.7.1 of AMR). | ||
137 | * @param[out] fc_v decoded fixed codebook vector (2.13) | ||
138 | * @param tab1 table used for first pulse_count pulses | ||
139 | * @param tab2 table used for last pulse | ||
140 | * @param pulse_indexes fixed codebook indexes | ||
141 | * @param pulse_signs signs of the excitation pulses (0 bit value | ||
142 | * means negative sign) | ||
143 | * @param bits number of bits per one pulse index | ||
144 | * @param pulse_count number of pulses decoded using first table | ||
145 | * @param bits length of one pulse index in bits | ||
146 | * | ||
147 | * Used in G.729 @@8k, G.729 @@4.4k, G.729 @@6.4k, AMR @@7.95k, AMR @@7.40k | ||
148 | */ | ||
149 | void ff_acelp_fc_pulse_per_track(int16_t* fc_v, | ||
150 | const uint8_t *tab1, | ||
151 | const uint8_t *tab2, | ||
152 | int pulse_indexes, | ||
153 | int pulse_signs, | ||
154 | int pulse_count, | ||
155 | int bits); | ||
156 | |||
157 | /** | ||
158 | * Decode the algebraic codebook index to pulse positions and signs and | ||
159 | * construct the algebraic codebook vector for MODE_12k2. | ||
160 | * | ||
161 | * @note: The positions and signs are explicitly coded in MODE_12k2. | ||
162 | * | ||
163 | * @param fixed_index positions of the ten pulses | ||
164 | * @param fixed_sparse pointer to the algebraic codebook vector | ||
165 | * @param gray_decode gray decoding table | ||
166 | * @param half_pulse_count number of couples of pulses | ||
167 | * @param bits length of one pulse index in bits | ||
168 | */ | ||
169 | void ff_decode_10_pulses_35bits(const int16_t *fixed_index, | ||
170 | AMRFixed *fixed_sparse, | ||
171 | const uint8_t *gray_decode, | ||
172 | int half_pulse_count, int bits); | ||
173 | |||
174 | |||
175 | /** | ||
176 | * weighted sum of two vectors with rounding. | ||
177 | * @param[out] out result of addition | ||
178 | * @param in_a first vector | ||
179 | * @param in_b second vector | ||
180 | * @param weight_coeff_a first vector weight coefficient | ||
181 | * @param weight_coeff_a second vector weight coefficient | ||
182 | * @param rounder this value will be added to the sum of the two vectors | ||
183 | * @param shift result will be shifted to right by this value | ||
184 | * @param length vectors length | ||
185 | * | ||
186 | * @note It is safe to pass the same buffer for out and in_a or in_b. | ||
187 | * | ||
188 | * out[i] = (in_a[i]*weight_a + in_b[i]*weight_b + rounder) >> shift | ||
189 | */ | ||
190 | void ff_acelp_weighted_vector_sum(int16_t* out, | ||
191 | const int16_t *in_a, | ||
192 | const int16_t *in_b, | ||
193 | int16_t weight_coeff_a, | ||
194 | int16_t weight_coeff_b, | ||
195 | int16_t rounder, | ||
196 | int shift, | ||
197 | int length); | ||
198 | |||
199 | /** | ||
200 | * float implementation of weighted sum of two vectors. | ||
201 | * @param[out] out result of addition | ||
202 | * @param in_a first vector | ||
203 | * @param in_b second vector | ||
204 | * @param weight_coeff_a first vector weight coefficient | ||
205 | * @param weight_coeff_a second vector weight coefficient | ||
206 | * @param length vectors length | ||
207 | * | ||
208 | * @note It is safe to pass the same buffer for out and in_a or in_b. | ||
209 | */ | ||
210 | void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b, | ||
211 | float weight_coeff_a, float weight_coeff_b, | ||
212 | int length); | ||
213 | |||
214 | /** | ||
215 | * Adaptive gain control (as used in AMR postfiltering) | ||
216 | * | ||
217 | * @param out output buffer for filtered speech data | ||
218 | * @param in the input speech buffer (may be the same as out) | ||
219 | * @param speech_energ input energy | ||
220 | * @param size the input buffer size | ||
221 | * @param alpha exponential filter factor | ||
222 | * @param gain_mem a pointer to the filter memory (single float of size) | ||
223 | */ | ||
224 | void ff_adaptive_gain_control(float *out, const float *in, float speech_energ, | ||
225 | int size, float alpha, float *gain_mem); | ||
226 | |||
227 | /** | ||
228 | * Set the sum of squares of a signal by scaling | ||
229 | * | ||
230 | * @param out output samples | ||
231 | * @param in input samples | ||
232 | * @param sum_of_squares new sum of squares | ||
233 | * @param n number of samples | ||
234 | * | ||
235 | * @note If the input is zero (or its energy underflows), the output is zero. | ||
236 | * This is the behavior of AGC in the AMR reference decoder. The QCELP | ||
237 | * reference decoder seems to have undefined behavior. | ||
238 | * | ||
239 | * TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6 | ||
240 | * 3GPP TS 26.090 6.1 (6) | ||
241 | */ | ||
242 | void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in, | ||
243 | float sum_of_squares, const int n); | ||
244 | |||
245 | /** | ||
246 | * Add fixed vector to an array from a sparse representation | ||
247 | * | ||
248 | * @param out fixed vector with pitch sharpening | ||
249 | * @param in sparse fixed vector | ||
250 | * @param scale number to multiply the fixed vector by | ||
251 | * @param size the output vector size | ||
252 | */ | ||
253 | void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size); | ||
254 | |||
255 | /** | ||
256 | * Clear array values set by set_fixed_vector | ||
257 | * | ||
258 | * @param out fixed vector to be cleared | ||
259 | * @param in sparse fixed vector | ||
260 | * @param size the output vector size | ||
261 | */ | ||
262 | void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size); | ||
263 | |||
264 | #endif /* AVCODEC_ACELP_VECTORS_H */ | ||