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 }; 165 166 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, 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
