170 lines
6.7 KiB
C
170 lines
6.7 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin */
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/**
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@file sb_celp.h
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@brief Sub-band CELP mode used for wideband encoding
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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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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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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 FOUNDATION OR
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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 SB_CELP_H
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#define SB_CELP_H
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#include "modes.h"
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#include <speex/speex_bits.h>
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#include "nb_celp.h"
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/**Structure representing the full state of the sub-band encoder*/
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typedef struct SBEncState {
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const SpeexMode *mode; /**< Pointer to the mode (containing for vtable info) */
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void *st_low; /**< State of the low-band (narrowband) encoder */
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int full_frame_size; /**< Length of full-band frames*/
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int frame_size; /**< Length of high-band frames*/
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int subframeSize; /**< Length of high-band sub-frames*/
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int nbSubframes; /**< Number of high-band sub-frames*/
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int windowSize; /**< Length of high-band LPC window*/
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int lpcSize; /**< Order of high-band LPC analysis */
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int bufSize; /**< Buffer size */
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int first; /**< First frame? */
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float lag_factor; /**< Lag-windowing control parameter */
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float lpc_floor; /**< Controls LPC analysis noise floor */
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spx_word16_t gamma1; /**< Perceptual weighting coef 1 */
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spx_word16_t gamma2; /**< Perceptual weighting coef 2 */
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char *stack; /**< Temporary allocation stack */
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spx_sig_t *x0d, *x1d; /**< QMF filter signals*/
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spx_sig_t *high; /**< High-band signal (buffer) */
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spx_sig_t *y0, *y1; /**< QMF synthesis signals */
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spx_word16_t *h0_mem, *h1_mem;
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spx_word32_t *g0_mem, *g1_mem; /**< QMF memories */
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spx_sig_t *excBuf; /**< High-band excitation */
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spx_sig_t *exc; /**< High-band excitation (for QMF only)*/
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spx_sig_t *buf; /**< Temporary buffer */
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spx_sig_t *res; /**< Zero-input response (ringing) */
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spx_sig_t *sw; /**< Perceptually weighted signal */
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spx_sig_t *target; /**< Weighted target signal (analysis by synthesis) */
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spx_word16_t *window; /**< LPC analysis window */
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spx_word16_t *lagWindow; /**< Auto-correlation window */
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spx_word16_t *autocorr; /**< Auto-correlation (for LPC analysis) */
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spx_coef_t *lpc; /**< LPC coefficients */
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spx_lsp_t *lsp; /**< LSP coefficients */
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spx_lsp_t *qlsp; /**< Quantized LSPs */
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spx_lsp_t *old_lsp; /**< LSPs of previous frame */
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spx_lsp_t *old_qlsp; /**< Quantized LSPs of previous frame */
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spx_lsp_t *interp_lsp; /**< Interpolated LSPs for current sub-frame */
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spx_lsp_t *interp_qlsp; /**< Interpolated quantized LSPs for current sub-frame */
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spx_coef_t *interp_lpc; /**< Interpolated LPCs for current sub-frame */
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spx_coef_t *interp_qlpc; /**< Interpolated quantized LPCs for current sub-frame */
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spx_coef_t *bw_lpc1; /**< Bandwidth-expanded version of LPCs (#1) */
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spx_coef_t *bw_lpc2; /**< Bandwidth-expanded version of LPCs (#2) */
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spx_mem_t *mem_sp; /**< Synthesis signal memory */
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spx_mem_t *mem_sp2;
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spx_mem_t *mem_sw; /**< Perceptual signal memory */
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spx_word32_t *pi_gain;
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float vbr_quality; /**< Quality setting for VBR encoding */
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int vbr_enabled; /**< 1 for enabling VBR, 0 otherwise */
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int abr_enabled; /**< ABR setting (in bps), 0 if off */
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float abr_drift;
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float abr_drift2;
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float abr_count;
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int vad_enabled; /**< 1 for enabling VAD, 0 otherwise */
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float relative_quality;
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int encode_submode;
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const SpeexSubmode * const *submodes;
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int submodeID;
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int submodeSelect;
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int complexity;
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int sampling_rate;
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} SBEncState;
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/**Structure representing the full state of the sub-band decoder*/
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typedef struct SBDecState {
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const SpeexMode *mode; /**< Pointer to the mode (containing for vtable info) */
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void *st_low; /**< State of the low-band (narrowband) encoder */
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int full_frame_size;
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int frame_size;
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int subframeSize;
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int nbSubframes;
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int lpcSize;
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int first;
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int sampling_rate;
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int lpc_enh_enabled;
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char *stack;
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spx_sig_t *x0d, *x1d;
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spx_sig_t *high;
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spx_sig_t *y0, *y1;
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spx_word32_t *g0_mem, *g1_mem;
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spx_sig_t *exc;
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spx_lsp_t *qlsp;
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spx_lsp_t *old_qlsp;
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spx_lsp_t *interp_qlsp;
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spx_coef_t *interp_qlpc;
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spx_mem_t *mem_sp;
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spx_word32_t *pi_gain;
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int encode_submode;
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const SpeexSubmode * const *submodes;
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int submodeID;
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} SBDecState;
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/**Initializes encoder state*/
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void *sb_encoder_init(const SpeexMode *m);
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/**De-allocates encoder state resources*/
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void sb_encoder_destroy(void *state);
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/**Encodes one frame*/
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int sb_encode(void *state, void *in, SpeexBits *bits);
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/**Initializes decoder state*/
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void *sb_decoder_init(const SpeexMode *m);
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/**De-allocates decoder state resources*/
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void sb_decoder_destroy(void *state);
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/**Decodes one frame*/
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int sb_decode(void *state, SpeexBits *bits, void *out);
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int sb_encoder_ctl(void *state, int request, void *ptr);
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int sb_decoder_ctl(void *state, int request, void *ptr);
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#endif
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