sb_celp.h
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上传日期:2014-04-03
资源大小:7248k
文件大小:7k
源码类别:
Windows CE
开发平台:
C/C++
- /* Copyright (C) 2002 Jean-Marc Valin */
- /**
- @file sb_celp.h
- @brief Sub-band CELP mode used for wideband encoding
- */
- /*
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- - Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- - Neither the name of the Xiph.org Foundation nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef SB_CELP_H
- #define SB_CELP_H
- #include "modes.h"
- #include <speex/speex_bits.h>
- #include "nb_celp.h"
- /**Structure representing the full state of the sub-band encoder*/
- typedef struct SBEncState {
- const SpeexMode *mode; /**< Pointer to the mode (containing for vtable info) */
- void *st_low; /**< State of the low-band (narrowband) encoder */
- int full_frame_size; /**< Length of full-band frames*/
- int frame_size; /**< Length of high-band frames*/
- int subframeSize; /**< Length of high-band sub-frames*/
- int nbSubframes; /**< Number of high-band sub-frames*/
- int windowSize; /**< Length of high-band LPC window*/
- int lpcSize; /**< Order of high-band LPC analysis */
- int bufSize; /**< Buffer size */
- int first; /**< First frame? */
- float lag_factor; /**< Lag-windowing control parameter */
- float lpc_floor; /**< Controls LPC analysis noise floor */
- spx_word16_t gamma1; /**< Perceptual weighting coef 1 */
- spx_word16_t gamma2; /**< Perceptual weighting coef 2 */
- char *stack; /**< Temporary allocation stack */
- spx_sig_t *x0d, *x1d; /**< QMF filter signals*/
- spx_sig_t *high; /**< High-band signal (buffer) */
- spx_sig_t *y0, *y1; /**< QMF synthesis signals */
- spx_word16_t *h0_mem, *h1_mem;
- spx_word32_t *g0_mem, *g1_mem; /**< QMF memories */
- spx_sig_t *excBuf; /**< High-band excitation */
- spx_sig_t *exc; /**< High-band excitation (for QMF only)*/
- spx_sig_t *buf; /**< Temporary buffer */
- spx_sig_t *res; /**< Zero-input response (ringing) */
- spx_sig_t *sw; /**< Perceptually weighted signal */
- spx_sig_t *target; /**< Weighted target signal (analysis by synthesis) */
- spx_word16_t *window; /**< LPC analysis window */
- spx_word16_t *lagWindow; /**< Auto-correlation window */
- spx_word16_t *autocorr; /**< Auto-correlation (for LPC analysis) */
- spx_coef_t *lpc; /**< LPC coefficients */
- spx_lsp_t *lsp; /**< LSP coefficients */
- spx_lsp_t *qlsp; /**< Quantized LSPs */
- spx_lsp_t *old_lsp; /**< LSPs of previous frame */
- spx_lsp_t *old_qlsp; /**< Quantized LSPs of previous frame */
- spx_lsp_t *interp_lsp; /**< Interpolated LSPs for current sub-frame */
- spx_lsp_t *interp_qlsp; /**< Interpolated quantized LSPs for current sub-frame */
- spx_coef_t *interp_lpc; /**< Interpolated LPCs for current sub-frame */
- spx_coef_t *interp_qlpc; /**< Interpolated quantized LPCs for current sub-frame */
- spx_coef_t *bw_lpc1; /**< Bandwidth-expanded version of LPCs (#1) */
- spx_coef_t *bw_lpc2; /**< Bandwidth-expanded version of LPCs (#2) */
- spx_mem_t *mem_sp; /**< Synthesis signal memory */
- spx_mem_t *mem_sp2;
- spx_mem_t *mem_sw; /**< Perceptual signal memory */
- spx_word32_t *pi_gain;
- float vbr_quality; /**< Quality setting for VBR encoding */
- int vbr_enabled; /**< 1 for enabling VBR, 0 otherwise */
- int abr_enabled; /**< ABR setting (in bps), 0 if off */
- float abr_drift;
- float abr_drift2;
- float abr_count;
- int vad_enabled; /**< 1 for enabling VAD, 0 otherwise */
- float relative_quality;
- int encode_submode;
- const SpeexSubmode * const *submodes;
- int submodeID;
- int submodeSelect;
- int complexity;
- int sampling_rate;
- } SBEncState;
- /**Structure representing the full state of the sub-band decoder*/
- typedef struct SBDecState {
- const SpeexMode *mode; /**< Pointer to the mode (containing for vtable info) */
- void *st_low; /**< State of the low-band (narrowband) encoder */
- int full_frame_size;
- int frame_size;
- int subframeSize;
- int nbSubframes;
- int lpcSize;
- int first;
- int sampling_rate;
- int lpc_enh_enabled;
- char *stack;
- spx_sig_t *x0d, *x1d;
- spx_sig_t *high;
- spx_sig_t *y0, *y1;
- spx_word32_t *g0_mem, *g1_mem;
- spx_sig_t *exc;
- spx_lsp_t *qlsp;
- spx_lsp_t *old_qlsp;
- spx_lsp_t *interp_qlsp;
- spx_coef_t *interp_qlpc;
- spx_mem_t *mem_sp;
- spx_word32_t *pi_gain;
- int encode_submode;
- const SpeexSubmode * const *submodes;
- int submodeID;
- } SBDecState;
- /**Initializes encoder state*/
- void *sb_encoder_init(const SpeexMode *m);
- /**De-allocates encoder state resources*/
- void sb_encoder_destroy(void *state);
- /**Encodes one frame*/
- int sb_encode(void *state, void *in, SpeexBits *bits);
- /**Initializes decoder state*/
- void *sb_decoder_init(const SpeexMode *m);
- /**De-allocates decoder state resources*/
- void sb_decoder_destroy(void *state);
- /**Decodes one frame*/
- int sb_decode(void *state, SpeexBits *bits, void *out);
- int sb_encoder_ctl(void *state, int request, void *ptr);
- int sb_decoder_ctl(void *state, int request, void *ptr);
- #endif