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+/* Copyright (C) 2002-2006 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 first; /**< First frame? */
+ spx_word16_t 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_word16_t *high; /**< High-band signal (buffer) */
+ spx_word16_t *h0_mem, *h1_mem;
+
+ const spx_word16_t *window; /**< LPC analysis window */
+ const spx_word16_t *lagWindow; /**< Auto-correlation window */
+ spx_lsp_t *old_lsp; /**< LSPs of previous frame */
+ spx_lsp_t *old_qlsp; /**< Quantized LSPs of previous frame */
+ spx_coef_t *interp_qlpc; /**< Interpolated quantized LPCs for current sub-frame */
+
+ 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;
+ spx_word16_t *exc_rms;
+ spx_word16_t *innov_rms_save; /**< If non-NULL, innovation is copied here */
+
+#ifndef DISABLE_VBR
+ float vbr_quality; /**< Quality setting for VBR encoding */
+ int vbr_enabled; /**< 1 for enabling VBR, 0 otherwise */
+ spx_int32_t vbr_max; /**< Max bit-rate allowed in VBR mode (total) */
+ spx_int32_t vbr_max_high; /**< Max bit-rate allowed in VBR mode for the high-band */
+ spx_int32_t 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;
+#endif /* #ifndef DISABLE_VBR */
+
+ int encode_submode;
+ const SpeexSubmode * const *submodes;
+ int submodeID;
+ int submodeSelect;
+ int complexity;
+ spx_int32_t 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;
+ spx_int32_t sampling_rate;
+ int lpc_enh_enabled;
+
+ char *stack;
+ spx_word16_t *g0_mem, *g1_mem;
+
+ spx_word16_t *excBuf;
+ spx_lsp_t *old_qlsp;
+ spx_coef_t *interp_qlpc;
+
+ spx_mem_t *mem_sp;
+ spx_word32_t *pi_gain;
+ spx_word16_t *exc_rms;
+ spx_word16_t *innov_save; /** If non-NULL, innovation is copied here */
+
+ spx_word16_t last_ener;
+ spx_int32_t seed;
+
+ 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