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comparison: media/libopus/celt/celt.h
media/libopus/celt/celt.h
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| 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 */ |
