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, int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec); 138 139 #define celt_encoder_ctl opus_custom_encoder_ctl 140 #define celt_decoder_ctl opus_custom_decoder_ctl 141 142 143 #ifdef CUSTOM_MODES 144 #define OPUS_CUSTOM_NOSTATIC 145 #else 146 #define OPUS_CUSTOM_NOSTATIC static OPUS_INLINE 147 #endif 148 149 static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0}; 150 /* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */ 151 static const unsigned char spread_icdf[4] = {25, 23, 2, 0}; 152 153 static const unsigned char tapset_icdf[3]={2,1,0}; 154 155 #ifdef CUSTOM_MODES 156 static const unsigned char toOpusTable[20] = { 157 0xE0, 0xE8, 0xF0, 0xF8, 158 0xC0, 0xC8, 0xD0, 0xD8, 159 0xA0, 0xA8, 0xB0, 0xB8, 160 0x00, 0x00, 0x00, 0x00, 161 0x80, 0x88, 0x90, 0x98, 162 }; 163 164 static const unsigned char fromOpusTable[16] = { 165 0x80, 0x88, 0x90, 0x98, 166 0x40, 0x48, 0x50, 0x58, 167 0x20, 0x28, 0x30, 0x38, 168 0x00, 0x08, 0x10, 0x18 169 }; 170 171 static OPUS_INLINE int toOpus(unsigned char c) 172 { 173 int ret=0; 174 if (c<0xA0) 175 ret = toOpusTable[c>>3]; 176 if (ret == 0) 177 return -1; 178 else 179 return ret|(c&0x7); 180 } 181 182 static OPUS_INLINE int fromOpus(unsigned char c) 183 { 184 if (c<0x80) 185 return -1; 186 else 187 return fromOpusTable[(c>>3)-16] | (c&0x7); 188 } 189 #endif /* CUSTOM_MODES */ 190 191 #define COMBFILTER_MAXPERIOD 1024 192 #define COMBFILTER_MINPERIOD 15 193 194 extern const signed char tf_select_table[4][8]; 195 196 int resampling_factor(opus_int32 rate); 197 198 void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RESTRICT inp, 199 int N, int CC, int upsample, const opus_val16 *coef, celt_sig *mem, int clip); 200 201 void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, 202 opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, 203 const opus_val16 *window, int overlap); 204 205 void init_caps(const CELTMode *m,int *cap,int LM,int C); 206 207 #ifdef RESYNTH 208 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); 209 210 void compute_inv_mdcts(const CELTMode *mode, int shortBlocks, celt_sig *X, 211 celt_sig * OPUS_RESTRICT out_mem[], int C, int LM); 212 #endif 213 214 #ifdef __cplusplus 215 } 216 #endif 217 218 #endif /* CELT_H */ 219
