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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 typedef struct {
54    int valid;
55    float tonality;
56    float tonality_slope;
57    float noisiness;
58    float activity;
59    float music_prob;
60    int        bandwidth;
61 }AnalysisInfo;
62 
63 #define __celt_check_mode_ptr_ptr(ptr) ((ptr) + ((ptr) - (const CELTMode**)(ptr)))
64 
65 #define __celt_check_analysis_ptr(ptr) ((ptr) + ((ptr) - (const AnalysisInfo*)(ptr)))
66 
67 /* Encoder/decoder Requests */
68 
69 #define CELT_SET_PREDICTION_REQUEST    10002
70 /** Controls the use of interframe prediction.
71     0=Independent frames
72     1=Short term interframe prediction allowed
73     2=Long term prediction allowed
74  */
75 #define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x)
76 
77 #define CELT_SET_INPUT_CLIPPING_REQUEST    10004
78 #define CELT_SET_INPUT_CLIPPING(x) CELT_SET_INPUT_CLIPPING_REQUEST, __opus_check_int(x)
79 
80 #define CELT_GET_AND_CLEAR_ERROR_REQUEST   10007
81 #define CELT_GET_AND_CLEAR_ERROR(x) CELT_GET_AND_CLEAR_ERROR_REQUEST, __opus_check_int_ptr(x)
82 
83 #define CELT_SET_CHANNELS_REQUEST    10008
84 #define CELT_SET_CHANNELS(x) CELT_SET_CHANNELS_REQUEST, __opus_check_int(x)
85 
86 
87 /* Internal */
88 #define CELT_SET_START_BAND_REQUEST    10010
89 #define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x)
90 
91 #define CELT_SET_END_BAND_REQUEST    10012
92 #define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x)
93 
94 #define CELT_GET_MODE_REQUEST    10015
95 /** Get the CELTMode used by an encoder or decoder */
96 #define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, __celt_check_mode_ptr_ptr(x)
97 
98 #define CELT_SET_SIGNALLING_REQUEST    10016
99 #define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x)
100 
101 #define CELT_SET_TONALITY_REQUEST    10018
102 #define CELT_SET_TONALITY(x) CELT_SET_TONALITY_REQUEST, __opus_check_int(x)
103 #define CELT_SET_TONALITY_SLOPE_REQUEST    10020
104 #define CELT_SET_TONALITY_SLOPE(x) CELT_SET_TONALITY_SLOPE_REQUEST, __opus_check_int(x)
105 
106 #define CELT_SET_ANALYSIS_REQUEST    10022
107 #define CELT_SET_ANALYSIS(x) CELT_SET_ANALYSIS_REQUEST, __celt_check_analysis_ptr(x)
108 
109 #define OPUS_SET_LFE_REQUEST    10024
110 #define OPUS_SET_LFE(x) OPUS_SET_LFE_REQUEST, __opus_check_int(x)
111 
112 #define OPUS_SET_ENERGY_MASK_REQUEST    10026
113 #define OPUS_SET_ENERGY_MASK(x) OPUS_SET_ENERGY_MASK_REQUEST, __opus_check_val16_ptr(x)
114 
115 /* Encoder stuff */
116 
117 int celt_encoder_get_size(int channels);
118 
119 int celt_encode_with_ec(OpusCustomEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *enc);
120 
121 int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels);
122 
123 
124 
125 /* Decoder stuff */
126 
127 int celt_decoder_get_size(int channels);
128 
129 
130 int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels);
131 
132 int celt_decode_with_ec(OpusCustomDecoder * OPUS_RESTRICT st, const unsigned char *data, int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec);
133 
134 #define celt_encoder_ctl opus_custom_encoder_ctl
135 #define celt_decoder_ctl opus_custom_decoder_ctl
136 
137 
138 #ifdef CUSTOM_MODES
139 #define OPUS_CUSTOM_NOSTATIC
140 #else
141 #define OPUS_CUSTOM_NOSTATIC static inline
142 #endif
143 
144 static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0};
145 /* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */
146 static const unsigned char spread_icdf[4] = {25, 23, 2, 0};
147 
148 static const unsigned char tapset_icdf[3]={2,1,0};
149 
150 #ifdef CUSTOM_MODES
151 static const unsigned char toOpusTable[20] = {
152       0xE0, 0xE8, 0xF0, 0xF8,
153       0xC0, 0xC8, 0xD0, 0xD8,
154       0xA0, 0xA8, 0xB0, 0xB8,
155       0x00, 0x00, 0x00, 0x00,
156       0x80, 0x88, 0x90, 0x98,
157 };
158 
159 static const unsigned char fromOpusTable[16] = {
160       0x80, 0x88, 0x90, 0x98,
161       0x40, 0x48, 0x50, 0x58,
162       0x20, 0x28, 0x30, 0x38,
163       0x00, 0x08, 0x10, 0x18
164 };
165 
toOpus(unsigned char c)166 static inline int toOpus(unsigned char c)
167 {
168    int ret=0;
169    if (c<0xA0)
170       ret = toOpusTable[c>>3];
171    if (ret == 0)
172       return -1;
173    else
174       return ret|(c&0x7);
175 }
176 
fromOpus(unsigned char c)177 static inline int fromOpus(unsigned char c)
178 {
179    if (c<0x80)
180       return -1;
181    else
182       return fromOpusTable[(c>>3)-16] | (c&0x7);
183 }
184 #endif /* CUSTOM_MODES */
185 
186 #define COMBFILTER_MAXPERIOD 1024
187 #define COMBFILTER_MINPERIOD 15
188 
189 extern const signed char tf_select_table[4][8];
190 
191 int resampling_factor(opus_int32 rate);
192 
193 void preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RESTRICT inp,
194                         int N, int CC, int upsample, const opus_val16 *coef, celt_sig *mem, int clip);
195 
196 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
197       opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
198       const opus_val16 *window, int overlap);
199 
200 void init_caps(const CELTMode *m,int *cap,int LM,int C);
201 
202 #ifdef RESYNTH
203 void deemphasis(celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem, celt_sig * OPUS_RESTRICT scratch);
204 
205 void compute_inv_mdcts(const CELTMode *mode, int shortBlocks, celt_sig *X,
206       celt_sig * OPUS_RESTRICT out_mem[], int C, int LM);
207 #endif
208 
209 #ifdef __cplusplus
210 }
211 #endif
212 
213 #endif /* CELT_H */
214