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218 lines
7 KiB
C
218 lines
7 KiB
C
/* Copyright (c) 2007-2008 CSIRO
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Copyright (c) 2007-2009 Xiph.Org Foundation
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Copyright (c) 2008 Gregory Maxwell
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Written by Jean-Marc Valin and Gregory Maxwell */
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/**
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@file celt.h
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@brief Contains all the functions for encoding and decoding audio
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CELT_H
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#define CELT_H
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#include "opus_types.h"
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#include "opus_defines.h"
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#include "opus_custom.h"
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#include "entenc.h"
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#include "entdec.h"
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#include "arch.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CELTEncoder OpusCustomEncoder
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#define CELTDecoder OpusCustomDecoder
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#define CELTMode OpusCustomMode
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typedef struct {
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int valid;
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float tonality;
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float tonality_slope;
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float noisiness;
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float activity;
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float music_prob;
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int bandwidth;
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}AnalysisInfo;
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#define __celt_check_mode_ptr_ptr(ptr) ((ptr) + ((ptr) - (const CELTMode**)(ptr)))
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#define __celt_check_analysis_ptr(ptr) ((ptr) + ((ptr) - (const AnalysisInfo*)(ptr)))
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/* Encoder/decoder Requests */
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/* Expose this option again when variable framesize actually works */
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#define OPUS_FRAMESIZE_VARIABLE 5010 /**< Optimize the frame size dynamically */
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#define CELT_SET_PREDICTION_REQUEST 10002
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/** Controls the use of interframe prediction.
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0=Independent frames
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1=Short term interframe prediction allowed
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2=Long term prediction allowed
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*/
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#define CELT_SET_PREDICTION(x) CELT_SET_PREDICTION_REQUEST, __opus_check_int(x)
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#define CELT_SET_INPUT_CLIPPING_REQUEST 10004
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#define CELT_SET_INPUT_CLIPPING(x) CELT_SET_INPUT_CLIPPING_REQUEST, __opus_check_int(x)
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#define CELT_GET_AND_CLEAR_ERROR_REQUEST 10007
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#define CELT_GET_AND_CLEAR_ERROR(x) CELT_GET_AND_CLEAR_ERROR_REQUEST, __opus_check_int_ptr(x)
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#define CELT_SET_CHANNELS_REQUEST 10008
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#define CELT_SET_CHANNELS(x) CELT_SET_CHANNELS_REQUEST, __opus_check_int(x)
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/* Internal */
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#define CELT_SET_START_BAND_REQUEST 10010
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#define CELT_SET_START_BAND(x) CELT_SET_START_BAND_REQUEST, __opus_check_int(x)
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#define CELT_SET_END_BAND_REQUEST 10012
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#define CELT_SET_END_BAND(x) CELT_SET_END_BAND_REQUEST, __opus_check_int(x)
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#define CELT_GET_MODE_REQUEST 10015
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/** Get the CELTMode used by an encoder or decoder */
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#define CELT_GET_MODE(x) CELT_GET_MODE_REQUEST, __celt_check_mode_ptr_ptr(x)
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#define CELT_SET_SIGNALLING_REQUEST 10016
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#define CELT_SET_SIGNALLING(x) CELT_SET_SIGNALLING_REQUEST, __opus_check_int(x)
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#define CELT_SET_TONALITY_REQUEST 10018
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#define CELT_SET_TONALITY(x) CELT_SET_TONALITY_REQUEST, __opus_check_int(x)
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#define CELT_SET_TONALITY_SLOPE_REQUEST 10020
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#define CELT_SET_TONALITY_SLOPE(x) CELT_SET_TONALITY_SLOPE_REQUEST, __opus_check_int(x)
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#define CELT_SET_ANALYSIS_REQUEST 10022
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#define CELT_SET_ANALYSIS(x) CELT_SET_ANALYSIS_REQUEST, __celt_check_analysis_ptr(x)
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#define OPUS_SET_LFE_REQUEST 10024
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#define OPUS_SET_LFE(x) OPUS_SET_LFE_REQUEST, __opus_check_int(x)
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#define OPUS_SET_ENERGY_MASK_REQUEST 10026
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#define OPUS_SET_ENERGY_MASK(x) OPUS_SET_ENERGY_MASK_REQUEST, __opus_check_val16_ptr(x)
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/* Encoder stuff */
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int celt_encoder_get_size(int channels);
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int celt_encode_with_ec(OpusCustomEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *enc);
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int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels,
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int arch);
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/* Decoder stuff */
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int celt_decoder_get_size(int channels);
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int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels);
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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);
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#define celt_encoder_ctl opus_custom_encoder_ctl
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#define celt_decoder_ctl opus_custom_decoder_ctl
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#ifdef CUSTOM_MODES
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#define OPUS_CUSTOM_NOSTATIC
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#else
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#define OPUS_CUSTOM_NOSTATIC static OPUS_INLINE
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#endif
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static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0};
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/* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */
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static const unsigned char spread_icdf[4] = {25, 23, 2, 0};
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static const unsigned char tapset_icdf[3]={2,1,0};
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#ifdef CUSTOM_MODES
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static const unsigned char toOpusTable[20] = {
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0xE0, 0xE8, 0xF0, 0xF8,
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0xC0, 0xC8, 0xD0, 0xD8,
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0xA0, 0xA8, 0xB0, 0xB8,
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0x00, 0x00, 0x00, 0x00,
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0x80, 0x88, 0x90, 0x98,
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};
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static const unsigned char fromOpusTable[16] = {
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0x80, 0x88, 0x90, 0x98,
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0x40, 0x48, 0x50, 0x58,
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0x20, 0x28, 0x30, 0x38,
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0x00, 0x08, 0x10, 0x18
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};
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static OPUS_INLINE int toOpus(unsigned char c)
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{
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int ret=0;
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if (c<0xA0)
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ret = toOpusTable[c>>3];
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if (ret == 0)
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return -1;
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else
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return ret|(c&0x7);
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}
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static OPUS_INLINE int fromOpus(unsigned char c)
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{
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if (c<0x80)
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return -1;
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else
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return fromOpusTable[(c>>3)-16] | (c&0x7);
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}
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#endif /* CUSTOM_MODES */
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#define COMBFILTER_MAXPERIOD 1024
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#define COMBFILTER_MINPERIOD 15
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extern const signed char tf_select_table[4][8];
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int resampling_factor(opus_int32 rate);
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void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RESTRICT inp,
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int N, int CC, int upsample, const opus_val16 *coef, celt_sig *mem, int clip);
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void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
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opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
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const opus_val16 *window, int overlap);
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void init_caps(const CELTMode *m,int *cap,int LM,int C);
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#ifdef RESYNTH
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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);
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void compute_inv_mdcts(const CELTMode *mode, int shortBlocks, celt_sig *X,
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celt_sig * OPUS_RESTRICT out_mem[], int C, int LM);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* CELT_H */
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