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 /* Expose this option again when variable framesize actually works */ 70 #define OPUS_FRAMESIZE_VARIABLE 5010 /**< Optimize the frame size dynamically */ 71 72 73 #define CELT_SET_PREDICTION_REQUEST 10002 74 /** Controls the use of interframe prediction. 75 0=Independent frames 76 1=Short term interframe prediction allowed 77 2=Long term prediction allowed 78 */ 79 #define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x) 80 81 #define CELT_SET_INPUT_CLIPPING_REQUEST 10004 82 #define CELT_SET_INPUT_CLIPPING(x) CELT_SET_INPUT_CLIPPING_REQUEST, __opus_check_int(x) 83 84 #define CELT_GET_AND_CLEAR_ERROR_REQUEST 10007 85 #define CELT_GET_AND_CLEAR_ERROR(x) CELT_GET_AND_CLEAR_ERROR_REQUEST, __opus_check_int_ptr(x) 86 87 #define CELT_SET_CHANNELS_REQUEST 10008 88 #define CELT_SET_CHANNELS(x) CELT_SET_CHANNELS_REQUEST, __opus_check_int(x) 89 90 91 /* Internal */ 92 #define CELT_SET_START_BAND_REQUEST 10010 93 #define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x) 94 95 #define CELT_SET_END_BAND_REQUEST 10012 96 #define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x) 97 98 #define CELT_GET_MODE_REQUEST 10015 99 /** Get the CELTMode used by an encoder or decoder */ 100 #define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, __celt_check_mode_ptr_ptr(x) 101 102 #define CELT_SET_SIGNALLING_REQUEST 10016 103 #define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x) 104 105 #define CELT_SET_TONALITY_REQUEST 10018 106 #define CELT_SET_TONALITY(x) CELT_SET_TONALITY_REQUEST, __opus_check_int(x) 107 #define CELT_SET_TONALITY_SLOPE_REQUEST 10020 108 #define CELT_SET_TONALITY_SLOPE(x) CELT_SET_TONALITY_SLOPE_REQUEST, __opus_check_int(x) 109 110 #define CELT_SET_ANALYSIS_REQUEST 10022 111 #define CELT_SET_ANALYSIS(x) CELT_SET_ANALYSIS_REQUEST, __celt_check_analysis_ptr(x) 112 113 #define OPUS_SET_LFE_REQUEST 10024 114 #define OPUS_SET_LFE(x) OPUS_SET_LFE_REQUEST, __opus_check_int(x) 115 116 #define OPUS_SET_ENERGY_MASK_REQUEST 10026 117 #define OPUS_SET_ENERGY_MASK(x) OPUS_SET_ENERGY_MASK_REQUEST, __opus_check_val16_ptr(x) 118 119 /* Encoder stuff */ 120 121 int celt_encoder_get_size(int channels); 122 123 int celt_encode_with_ec(OpusCustomEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *enc); 124 125 int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels, 126 int arch); 127 128 129 130 /* Decoder stuff */ 131 132 int celt_decoder_get_size(int channels); 133 134 135 int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels); 136 137 int celt_decode_with_ec(OpusCustomDecoder * OPUS_RESTRICT st, const unsigned char *data, 138 int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec, int accum); 139 140 #define celt_encoder_ctl opus_custom_encoder_ctl 141 #define celt_decoder_ctl opus_custom_decoder_ctl 142 143 144 #ifdef CUSTOM_MODES 145 #define OPUS_CUSTOM_NOSTATIC 146 #else 147 #define OPUS_CUSTOM_NOSTATIC static OPUS_INLINE 148 #endif 149 150 static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0}; 151 /* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */ 152 static const unsigned char spread_icdf[4] = {25, 23, 2, 0}; 153 154 static const unsigned char tapset_icdf[3]={2,1,0}; 155 156 #ifdef CUSTOM_MODES 157 static const unsigned char toOpusTable[20] = { 158 0xE0, 0xE8, 0xF0, 0xF8, 159 0xC0, 0xC8, 0xD0, 0xD8, 160 0xA0, 0xA8, 0xB0, 0xB8, 161 0x00, 0x00, 0x00, 0x00, 162 0x80, 0x88, 0x90, 0x98, 163 }; 164 165 static const unsigned char fromOpusTable[16] = { 166 0x80, 0x88, 0x90, 0x98, 167 0x40, 0x48, 0x50, 0x58, 168 0x20, 0x28, 0x30, 0x38, 169 0x00, 0x08, 0x10, 0x18 170 }; 171 172 static OPUS_INLINE int toOpus(unsigned char c) 173 { 174 int ret=0; 175 if (c<0xA0) 176 ret = toOpusTable[c>>3]; 177 if (ret == 0) 178 return -1; 179 else 180 return ret|(c&0x7); 181 } 182 183 static OPUS_INLINE int fromOpus(unsigned char c) 184 { 185 if (c<0x80) 186 return -1; 187 else 188 return fromOpusTable[(c>>3)-16] | (c&0x7); 189 } 190 #endif /* CUSTOM_MODES */ 191 192 #define COMBFILTER_MAXPERIOD 1024 193 #define COMBFILTER_MINPERIOD 15 194 195 extern const signed char tf_select_table[4][8]; 196 197 int resampling_factor(opus_int32 rate); 198 199 void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RESTRICT inp, 200 int N, int CC, int upsample, const opus_val16 *coef, celt_sig *mem, int clip); 201 202 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, 203 opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, 204 const opus_val16 *window, int overlap, int arch); 205 206 #ifdef NON_STATIC_COMB_FILTER_CONST_C 207 void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N, 208 opus_val16 g10, opus_val16 g11, opus_val16 g12); 209 #endif 210 211 #ifndef OVERRIDE_COMB_FILTER_CONST 212 # define comb_filter_const(y, x, T, N, g10, g11, g12, arch) \ 213 ((void)(arch),comb_filter_const_c(y, x, T, N, g10, g11, g12)) 214 #endif 215 216 void init_caps(const CELTMode *m,int *cap,int LM,int C); 217 218 #ifdef RESYNTH 219 void deemphasis(celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem); 220 void celt_synthesis(const CELTMode *mode, celt_norm *X, celt_sig * out_syn[], 221 opus_val16 *oldBandE, int start, int effEnd, int C, int CC, int isTransient, 222 int LM, int downsample, int silence); 223 #endif 224 225 #ifdef __cplusplus 226 } 227 #endif 228 229 #endif /* CELT_H */ 230
