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 vad_prob; 63 int bandwidth; 64 float activity_probability; 65 /* Store as Q6 char to save space. */ 66 unsigned char leak_boost[LEAK_BANDS]; 67 } AnalysisInfo; 68 69 typedef struct { 70 int signalType; 71 int offset; 72 } SILKInfo; 73 74 #define __celt_check_mode_ptr_ptr(ptr) ((ptr) + ((ptr) - (const CELTMode**)(ptr))) 75 76 #define __celt_check_analysis_ptr(ptr) ((ptr) + ((ptr) - (const AnalysisInfo*)(ptr))) 77 78 #define __celt_check_silkinfo_ptr(ptr) ((ptr) + ((ptr) - (const SILKInfo*)(ptr))) 79 80 /* Encoder/decoder Requests */ 81 82 83 #define CELT_SET_PREDICTION_REQUEST 10002 84 /** Controls the use of interframe prediction. 85 0=Independent frames 86 1=Short term interframe prediction allowed 87 2=Long term prediction allowed 88 */ 89 #define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x) 90 91 #define CELT_SET_INPUT_CLIPPING_REQUEST 10004 92 #define CELT_SET_INPUT_CLIPPING(x) CELT_SET_INPUT_CLIPPING_REQUEST, __opus_check_int(x) 93 94 #define CELT_GET_AND_CLEAR_ERROR_REQUEST 10007 95 #define CELT_GET_AND_CLEAR_ERROR(x) CELT_GET_AND_CLEAR_ERROR_REQUEST, __opus_check_int_ptr(x) 96 97 #define CELT_SET_CHANNELS_REQUEST 10008 98 #define CELT_SET_CHANNELS(x) CELT_SET_CHANNELS_REQUEST, __opus_check_int(x) 99 100 101 /* Internal */ 102 #define CELT_SET_START_BAND_REQUEST 10010 103 #define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x) 104 105 #define CELT_SET_END_BAND_REQUEST 10012 106 #define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x) 107 108 #define CELT_GET_MODE_REQUEST 10015 109 /** Get the CELTMode used by an encoder or decoder */ 110 #define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, __celt_check_mode_ptr_ptr(x) 111 112 #define CELT_SET_SIGNALLING_REQUEST 10016 113 #define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x) 114 115 #define CELT_SET_TONALITY_REQUEST 10018 116 #define CELT_SET_TONALITY(x) CELT_SET_TONALITY_REQUEST, __opus_check_int(x) 117 #define CELT_SET_TONALITY_SLOPE_REQUEST 10020 118 #define CELT_SET_TONALITY_SLOPE(x) CELT_SET_TONALITY_SLOPE_REQUEST, __opus_check_int(x) 119 120 #define CELT_SET_ANALYSIS_REQUEST 10022 121 #define CELT_SET_ANALYSIS(x) CELT_SET_ANALYSIS_REQUEST, __celt_check_analysis_ptr(x) 122 123 #define OPUS_SET_LFE_REQUEST 10024 124 #define OPUS_SET_LFE(x) OPUS_SET_LFE_REQUEST, __opus_check_int(x) 125 126 #define OPUS_SET_ENERGY_MASK_REQUEST 10026 127 #define OPUS_SET_ENERGY_MASK(x) OPUS_SET_ENERGY_MASK_REQUEST, __opus_check_val16_ptr(x) 128 129 #define CELT_SET_SILK_INFO_REQUEST 10028 130 #define CELT_SET_SILK_INFO(x) CELT_SET_SILK_INFO_REQUEST, __celt_check_silkinfo_ptr(x) 131 132 /* Encoder stuff */ 133 134 int celt_encoder_get_size(int channels); 135 136 int celt_encode_with_ec(OpusCustomEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *enc); 137 138 int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels, 139 int arch); 140 141 142 143 /* Decoder stuff */ 144 145 int celt_decoder_get_size(int channels); 146 147 148 int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels); 149 150 int celt_decode_with_ec(OpusCustomDecoder * OPUS_RESTRICT st, const unsigned char *data, 151 int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec, int accum); 152 153 #define celt_encoder_ctl opus_custom_encoder_ctl 154 #define celt_decoder_ctl opus_custom_decoder_ctl 155 156 157 #ifdef CUSTOM_MODES 158 #define OPUS_CUSTOM_NOSTATIC 159 #else 160 #define OPUS_CUSTOM_NOSTATIC static OPUS_INLINE 161 #endif 162 163 static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0}; 164 /* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */ 165 static const unsigned char spread_icdf[4] = {25, 23, 2, 0}; 166 167 static const unsigned char tapset_icdf[3]={2,1,0}; 168 169 #ifdef CUSTOM_MODES 170 static const unsigned char toOpusTable[20] = { 171 0xE0, 0xE8, 0xF0, 0xF8, 172 0xC0, 0xC8, 0xD0, 0xD8, 173 0xA0, 0xA8, 0xB0, 0xB8, 174 0x00, 0x00, 0x00, 0x00, 175 0x80, 0x88, 0x90, 0x98, 176 }; 177 178 static const unsigned char fromOpusTable[16] = { 179 0x80, 0x88, 0x90, 0x98, 180 0x40, 0x48, 0x50, 0x58, 181 0x20, 0x28, 0x30, 0x38, 182 0x00, 0x08, 0x10, 0x18 183 }; 184 185 static OPUS_INLINE int toOpus(unsigned char c) 186 { 187 int ret=0; 188 if (c<0xA0) 189 ret = toOpusTable[c>>3]; 190 if (ret == 0) 191 return -1; 192 else 193 return ret|(c&0x7); 194 } 195 196 static OPUS_INLINE int fromOpus(unsigned char c) 197 { 198 if (c<0x80) 199 return -1; 200 else 201 return fromOpusTable[(c>>3)-16] | (c&0x7); 202 } 203 #endif /* CUSTOM_MODES */ 204 205 #define COMBFILTER_MAXPERIOD 1024 206 #define COMBFILTER_MINPERIOD 15 207 208 extern const signed char tf_select_table[4][8]; 209 210 int resampling_factor(opus_int32 rate); 211 212 void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RESTRICT inp, 213 int N, int CC, int upsample, const opus_val16 *coef, celt_sig *mem, int clip); 214 215 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, 216 opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, 217 const opus_val16 *window, int overlap, int arch); 218 219 #ifdef NON_STATIC_COMB_FILTER_CONST_C 220 void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N, 221 opus_val16 g10, opus_val16 g11, opus_val16 g12); 222 #endif 223 224 #ifndef OVERRIDE_COMB_FILTER_CONST 225 # define comb_filter_const(y, x, T, N, g10, g11, g12, arch) \ 226 ((void)(arch),comb_filter_const_c(y, x, T, N, g10, g11, g12)) 227 #endif 228 229 void init_caps(const CELTMode *m,int *cap,int LM,int C); 230 231 #ifdef RESYNTH 232 void deemphasis(celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem); 233 void celt_synthesis(const CELTMode *mode, celt_norm *X, celt_sig * out_syn[], 234 opus_val16 *oldBandE, int start, int effEnd, int C, int CC, int isTransient, 235 int LM, int downsample, int silence); 236 #endif 237 238 #ifdef __cplusplus 239 } 240 #endif 241 242 #endif /* CELT_H */ 243
