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1 /* Copyright (c) 2007-2008 CSIRO | 1 /* Copyright (c) 2007-2008 CSIRO |
2 Copyright (c) 2007-2009 Xiph.Org Foundation | 2 Copyright (c) 2007-2009 Xiph.Org Foundation |
3 Copyright (c) 2008 Gregory Maxwell | 3 Copyright (c) 2008 Gregory Maxwell |
4 Written by Jean-Marc Valin and Gregory Maxwell */ | 4 Written by Jean-Marc Valin and Gregory Maxwell */ |
5 /** | 5 /** |
6 @file celt.h | 6 @file celt.h |
7 @brief Contains all the functions for encoding and decoding audio | 7 @brief Contains all the functions for encoding and decoding audio |
8 */ | 8 */ |
9 | 9 |
10 /* | 10 /* |
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43 #include "arch.h" | 43 #include "arch.h" |
44 | 44 |
45 #ifdef __cplusplus | 45 #ifdef __cplusplus |
46 extern "C" { | 46 extern "C" { |
47 #endif | 47 #endif |
48 | 48 |
49 #define CELTEncoder OpusCustomEncoder | 49 #define CELTEncoder OpusCustomEncoder |
50 #define CELTDecoder OpusCustomDecoder | 50 #define CELTDecoder OpusCustomDecoder |
51 #define CELTMode OpusCustomMode | 51 #define CELTMode OpusCustomMode |
52 | 52 |
53 #define _celt_check_mode_ptr_ptr(ptr) ((ptr) + ((ptr) - (const CELTMode**)(ptr))
) | 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*)(p
tr))) |
54 | 66 |
55 /* Encoder/decoder Requests */ | 67 /* Encoder/decoder Requests */ |
56 | 68 |
57 #define CELT_SET_PREDICTION_REQUEST 10002 | 69 #define CELT_SET_PREDICTION_REQUEST 10002 |
58 /** Controls the use of interframe prediction. | 70 /** Controls the use of interframe prediction. |
59 0=Independent frames | 71 0=Independent frames |
60 1=Short term interframe prediction allowed | 72 1=Short term interframe prediction allowed |
61 2=Long term prediction allowed | 73 2=Long term prediction allowed |
62 */ | 74 */ |
63 #define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x) | 75 #define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x) |
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74 | 86 |
75 /* Internal */ | 87 /* Internal */ |
76 #define CELT_SET_START_BAND_REQUEST 10010 | 88 #define CELT_SET_START_BAND_REQUEST 10010 |
77 #define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x) | 89 #define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x) |
78 | 90 |
79 #define CELT_SET_END_BAND_REQUEST 10012 | 91 #define CELT_SET_END_BAND_REQUEST 10012 |
80 #define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x) | 92 #define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x) |
81 | 93 |
82 #define CELT_GET_MODE_REQUEST 10015 | 94 #define CELT_GET_MODE_REQUEST 10015 |
83 /** Get the CELTMode used by an encoder or decoder */ | 95 /** Get the CELTMode used by an encoder or decoder */ |
84 #define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, _celt_check_mode_ptr_ptr(x) | 96 #define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, __celt_check_mode_ptr_ptr(x) |
85 | 97 |
86 #define CELT_SET_SIGNALLING_REQUEST 10016 | 98 #define CELT_SET_SIGNALLING_REQUEST 10016 |
87 #define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x) | 99 #define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x) |
88 | 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) |
89 | 105 |
| 106 #define CELT_SET_ANALYSIS_REQUEST 10022 |
| 107 #define CELT_SET_ANALYSIS(x) CELT_SET_ANALYSIS_REQUEST, __celt_check_analysis_pt
r(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) |
90 | 114 |
91 /* Encoder stuff */ | 115 /* Encoder stuff */ |
92 | 116 |
93 int celt_encoder_get_size(int channels); | 117 int celt_encoder_get_size(int channels); |
94 | 118 |
95 int celt_encode_with_ec(OpusCustomEncoder * OPUS_RESTRICT st, const opus_val16 *
pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *
enc); | 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); |
96 | 120 |
97 int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels); | 121 int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels); |
98 | 122 |
99 | 123 |
100 | 124 |
101 /* Decoder stuff */ | 125 /* Decoder stuff */ |
102 | 126 |
103 int celt_decoder_get_size(int channels); | 127 int celt_decoder_get_size(int channels); |
104 | 128 |
105 | 129 |
106 int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels); | 130 int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels); |
107 | 131 |
108 int celt_decode_with_ec(OpusCustomDecoder * OPUS_RESTRICT st, const unsigned cha
r *data, int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec); | 132 int celt_decode_with_ec(OpusCustomDecoder * OPUS_RESTRICT st, const unsigned cha
r *data, int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec); |
109 | 133 |
110 #define celt_encoder_ctl opus_custom_encoder_ctl | 134 #define celt_encoder_ctl opus_custom_encoder_ctl |
111 #define celt_decoder_ctl opus_custom_decoder_ctl | 135 #define celt_decoder_ctl opus_custom_decoder_ctl |
112 | 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 |
| 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 |
| 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, cel
t_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, c
onst 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 |
113 #ifdef __cplusplus | 209 #ifdef __cplusplus |
114 } | 210 } |
115 #endif | 211 #endif |
116 | 212 |
117 #endif /* CELT_H */ | 213 #endif /* CELT_H */ |
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