1 /* Copyright (c) 2007-2008 CSIRO
2 Copyright (c) 2007-2009 Xiph.Org Foundation
3 Copyright (c) 2008 Gregory Maxwell
4 Written by Jean-Marc Valin and Gregory Maxwell */
5 /**
6 @file celt.h
7 @brief Contains all the functions for encoding and decoding audio
8 */
9
10 /*
11 Redistribution and use in source and binary forms, with or without
12 modification, are permitted provided that the following conditions
13 are met:
14
15 - Redistributions of source code must retain the above copyright
16 notice, this list of conditions and the following disclaimer.
17
18 - Redistributions in binary form must reproduce the above copyright
19 notice, this list of conditions and the following disclaimer in the
20 documentation and/or other materials provided with the distribution.
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 COPYRIGHT OWNER
26 OR 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 CELT_H
36 #define CELT_H
37
38 #include "opus_types.h"
39 #include "opus_defines.h"
40 #include "opus_custom.h"
41 #include "entenc.h"
42 #include "entdec.h"
43 #include "arch.h"
44
45 #ifdef __cplusplus
46 extern "C" {
47 #endif
48
49 #define CELTEncoder OpusCustomEncoder
50 #define CELTDecoder OpusCustomDecoder
51 #define CELTMode OpusCustomMode
52
53 #define LEAK_BANDS 19
54
55 typedef struct {
56 int valid;
57 float tonality;
58 float tonality_slope;
59 float noisiness;
60 float activity;
61 float music_prob;
62 float music_prob_min;
63 float music_prob_max;
64 int bandwidth;
65 float activity_probability;
66 float max_pitch_ratio;
67 /* Store as Q6 char to save space. */
68 unsigned char leak_boost[LEAK_BANDS];
69 } AnalysisInfo;
70
71 typedef struct {
72 int signalType;
73 int offset;
74 } SILKInfo;
75
76 #define __celt_check_mode_ptr_ptr(ptr) ((ptr) + ((ptr) - (const CELTMode**)(ptr)))
77
78 #define __celt_check_analysis_ptr(ptr) ((ptr) + ((ptr) - (const AnalysisInfo*)(ptr)))
79
80 #define __celt_check_silkinfo_ptr(ptr) ((ptr) + ((ptr) - (const SILKInfo*)(ptr)))
81
82 /* Encoder/decoder Requests */
83
84
85 #define CELT_SET_PREDICTION_REQUEST 10002
86 /** Controls the use of interframe prediction.
87 0=Independent frames
88 1=Short term interframe prediction allowed
89 2=Long term prediction allowed
90 */
91 #define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x)
92
93 #define CELT_SET_INPUT_CLIPPING_REQUEST 10004
94 #define CELT_SET_INPUT_CLIPPING(x) CELT_SET_INPUT_CLIPPING_REQUEST, __opus_check_int(x)
95
96 #define CELT_GET_AND_CLEAR_ERROR_REQUEST 10007
97 #define CELT_GET_AND_CLEAR_ERROR(x) CELT_GET_AND_CLEAR_ERROR_REQUEST, __opus_check_int_ptr(x)
98
99 #define CELT_SET_CHANNELS_REQUEST 10008
100 #define CELT_SET_CHANNELS(x) CELT_SET_CHANNELS_REQUEST, __opus_check_int(x)
101
102
103 /* Internal */
104 #define CELT_SET_START_BAND_REQUEST 10010
105 #define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x)
106
107 #define CELT_SET_END_BAND_REQUEST 10012
108 #define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x)
109
110 #define CELT_GET_MODE_REQUEST 10015
111 /** Get the CELTMode used by an encoder or decoder */
112 #define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, __celt_check_mode_ptr_ptr(x)
113
114 #define CELT_SET_SIGNALLING_REQUEST 10016
115 #define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x)
116
117 #define CELT_SET_TONALITY_REQUEST 10018
118 #define CELT_SET_TONALITY(x) CELT_SET_TONALITY_REQUEST, __opus_check_int(x)
119 #define CELT_SET_TONALITY_SLOPE_REQUEST 10020
120 #define CELT_SET_TONALITY_SLOPE(x) CELT_SET_TONALITY_SLOPE_REQUEST, __opus_check_int(x)
121
122 #define CELT_SET_ANALYSIS_REQUEST 10022
123 #define CELT_SET_ANALYSIS(x) CELT_SET_ANALYSIS_REQUEST, __celt_check_analysis_ptr(x)
124
125 #define OPUS_SET_LFE_REQUEST 10024
126 #define OPUS_SET_LFE(x) OPUS_SET_LFE_REQUEST, __opus_check_int(x)
127
128 #define OPUS_SET_ENERGY_MASK_REQUEST 10026
129 #define OPUS_SET_ENERGY_MASK(x) OPUS_SET_ENERGY_MASK_REQUEST, __opus_check_val16_ptr(x)
130
131 #define CELT_SET_SILK_INFO_REQUEST 10028
132 #define CELT_SET_SILK_INFO(x) CELT_SET_SILK_INFO_REQUEST, __celt_check_silkinfo_ptr(x)
133
134 /* Encoder stuff */
135
136 int celt_encoder_get_size(int channels);
137
138 int celt_encode_with_ec(OpusCustomEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *enc);
139
140 int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels,
141 int arch);
142
143
144
145 /* Decoder stuff */
146
147 int celt_decoder_get_size(int channels);
148
149
150 int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels);
151
152 int celt_decode_with_ec(OpusCustomDecoder * OPUS_RESTRICT st, const unsigned char *data,
153 int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec, int accum);
154
155 #define celt_encoder_ctl opus_custom_encoder_ctl
156 #define celt_decoder_ctl opus_custom_decoder_ctl
157
158
159 #ifdef CUSTOM_MODES
160 #define OPUS_CUSTOM_NOSTATIC
161 #else
162 #define OPUS_CUSTOM_NOSTATIC static OPUS_INLINE
163 #endif
164
165 static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0};
166 /* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */
167 static const unsigned char spread_icdf[4] = {25, 23, 2, 0};
168
169 static const unsigned char tapset_icdf[3]={2,1,0};
170
171 #ifdef CUSTOM_MODES
172 static const unsigned char toOpusTable[20] = {
173 0xE0, 0xE8, 0xF0, 0xF8,
174 0xC0, 0xC8, 0xD0, 0xD8,
175 0xA0, 0xA8, 0xB0, 0xB8,
176 0x00, 0x00, 0x00, 0x00,
177 0x80, 0x88, 0x90, 0x98,
178 };
179
180 static const unsigned char fromOpusTable[16] = {
181 0x80, 0x88, 0x90, 0x98,
182 0x40, 0x48, 0x50, 0x58,
183 0x20, 0x28, 0x30, 0x38,
184 0x00, 0x08, 0x10, 0x18
185 };
186
toOpus(unsigned char c)187 static OPUS_INLINE int toOpus(unsigned char c)
188 {
189 int ret=0;
190 if (c<0xA0)
191 ret = toOpusTable[c>>3];
192 if (ret == 0)
193 return -1;
194 else
195 return ret|(c&0x7);
196 }
197
fromOpus(unsigned char c)198 static OPUS_INLINE int fromOpus(unsigned char c)
199 {
200 if (c<0x80)
201 return -1;
202 else
203 return fromOpusTable[(c>>3)-16] | (c&0x7);
204 }
205 #endif /* CUSTOM_MODES */
206
207 #define COMBFILTER_MAXPERIOD 1024
208 #define COMBFILTER_MINPERIOD 15
209
210 extern const signed char tf_select_table[4][8];
211
212 #if defined(ENABLE_HARDENING) || defined(ENABLE_ASSERTIONS)
213 void validate_celt_decoder(CELTDecoder *st);
214 #define VALIDATE_CELT_DECODER(st) validate_celt_decoder(st)
215 #else
216 #define VALIDATE_CELT_DECODER(st)
217 #endif
218
219 int resampling_factor(opus_int32 rate);
220
221 void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RESTRICT inp,
222 int N, int CC, int upsample, const opus_val16 *coef, celt_sig *mem, int clip);
223
224 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
225 opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
226 const opus_val16 *window, int overlap, int arch);
227
228 #ifdef NON_STATIC_COMB_FILTER_CONST_C
229 void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N,
230 opus_val16 g10, opus_val16 g11, opus_val16 g12);
231 #endif
232
233 #ifndef OVERRIDE_COMB_FILTER_CONST
234 # define comb_filter_const(y, x, T, N, g10, g11, g12, arch) \
235 ((void)(arch),comb_filter_const_c(y, x, T, N, g10, g11, g12))
236 #endif
237
238 void init_caps(const CELTMode *m,int *cap,int LM,int C);
239
240 #ifdef RESYNTH
241 void deemphasis(celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem);
242 void celt_synthesis(const CELTMode *mode, celt_norm *X, celt_sig * out_syn[],
243 opus_val16 *oldBandE, int start, int effEnd, int C, int CC, int isTransient,
244 int LM, int downsample, int silence);
245 #endif
246
247 #ifdef __cplusplus
248 }
249 #endif
250
251 #endif /* CELT_H */
252