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167 lines
6.5 KiB
167 lines
6.5 KiB
/* 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_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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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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float gamma1; /**< Perceptual weighting coef 1 */ |
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float gamma2; /**< Perceptual weighting coef 2 */ |
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char *stack; /**< Temporary allocation stack */ |
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float *x0d, *x1d; /**< QMF filter signals*/ |
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float *high; /**< High-band signal (buffer) */ |
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float *y0, *y1; /**< QMF synthesis signals */ |
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float *h0_mem, *h1_mem, *g0_mem, *g1_mem; /**< QMF memories */ |
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float *excBuf; /**< High-band excitation */ |
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float *exc; /**< High-band excitation (for QMF only)*/ |
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float *buf; /**< Temporary buffer */ |
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float *res; /**< Zero-input response (ringing) */ |
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float *sw; /**< Perceptually weighted signal */ |
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float *target; /**< Weighted target signal (analysis by synthesis) */ |
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float *window; /**< LPC analysis window */ |
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float *lagWindow; /**< Auto-correlation window */ |
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float *autocorr; /**< Auto-correlation (for LPC analysis) */ |
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float *rc; /**< Reflection coefficients (unused) */ |
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float *lpc; /**< LPC coefficients */ |
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float *lsp; /**< LSP coefficients */ |
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float *qlsp; /**< Quantized LSPs */ |
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float *old_lsp; /**< LSPs of previous frame */ |
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float *old_qlsp; /**< Quantized LSPs of previous frame */ |
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float *interp_lsp; /**< Interpolated LSPs for current sub-frame */ |
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float *interp_qlsp; /**< Interpolated quantized LSPs for current sub-frame */ |
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float *interp_lpc; /**< Interpolated LPCs for current sub-frame */ |
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float *interp_qlpc; /**< Interpolated quantized LPCs for current sub-frame */ |
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float *bw_lpc1; /**< Bandwidth-expanded version of LPCs (#1) */ |
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float *bw_lpc2; /**< Bandwidth-expanded version of LPCs (#2) */ |
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float *mem_sp; /**< Synthesis signal memory */ |
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float *mem_sp2; |
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float *mem_sw; /**< Perceptual signal memory */ |
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float *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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SpeexSubmode **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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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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float *x0d, *x1d; |
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float *high; |
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float *y0, *y1; |
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float *h0_mem, *h1_mem, *g0_mem, *g1_mem; |
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float *exc; |
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float *qlsp; |
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float *old_qlsp; |
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float *interp_qlsp; |
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float *interp_qlpc; |
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float *mem_sp; |
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float *pi_gain; |
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SpeexSubmode **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(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, float *in, SpeexBits *bits); |
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/**Initializes decoder state*/ |
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void *sb_decoder_init(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, float *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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