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| 1 /* Copyright (C) 2002-2006 Jean-Marc Valin */ |
| 2 /** |
| 3 @file sb_celp.h |
| 4 @brief Sub-band CELP mode used for wideband encoding |
| 5 */ |
| 6 /* |
| 7 Redistribution and use in source and binary forms, with or without |
| 8 modification, are permitted provided that the following conditions |
| 9 are met: |
| 10 |
| 11 - Redistributions of source code must retain the above copyright |
| 12 notice, this list of conditions and the following disclaimer. |
| 13 |
| 14 - Redistributions in binary form must reproduce the above copyright |
| 15 notice, this list of conditions and the following disclaimer in the |
| 16 documentation and/or other materials provided with the distribution. |
| 17 |
| 18 - Neither the name of the Xiph.org Foundation nor the names of its |
| 19 contributors may be used to endorse or promote products derived from |
| 20 this software without specific prior written permission. |
| 21 |
| 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 |
| 34 */ |
| 35 |
| 36 #ifndef SB_CELP_H |
| 37 #define SB_CELP_H |
| 38 |
| 39 #include "modes.h" |
| 40 #include <speex/speex_bits.h> |
| 41 #include "nb_celp.h" |
| 42 |
| 43 /**Structure representing the full state of the sub-band encoder*/ |
| 44 typedef struct SBEncState { |
| 45 const SpeexMode *mode; /**< Pointer to the mode (containing for vtabl
e info) */ |
| 46 void *st_low; /**< State of the low-band (narrowband) encode
r */ |
| 47 int full_frame_size; /**< Length of full-band frames*/ |
| 48 int frame_size; /**< Length of high-band frames*/ |
| 49 int subframeSize; /**< Length of high-band sub-frames*/ |
| 50 int nbSubframes; /**< Number of high-band sub-frames*/ |
| 51 int windowSize; /**< Length of high-band LPC window*/ |
| 52 int lpcSize; /**< Order of high-band LPC analysis */ |
| 53 int first; /**< First frame? */ |
| 54 spx_word16_t lpc_floor; /**< Controls LPC analysis noise floor */ |
| 55 spx_word16_t gamma1; /**< Perceptual weighting coef 1 */ |
| 56 spx_word16_t gamma2; /**< Perceptual weighting coef 2 */ |
| 57 |
| 58 char *stack; /**< Temporary allocation stack */ |
| 59 spx_word16_t *high; /**< High-band signal (buffer) */ |
| 60 spx_word16_t *h0_mem, *h1_mem; |
| 61 |
| 62 const spx_word16_t *window; /**< LPC analysis window */ |
| 63 const spx_word16_t *lagWindow; /**< Auto-correlation window */ |
| 64 spx_lsp_t *old_lsp; /**< LSPs of previous frame */ |
| 65 spx_lsp_t *old_qlsp; /**< Quantized LSPs of previous frame */ |
| 66 spx_coef_t *interp_qlpc; /**< Interpolated quantized LPCs for current s
ub-frame */ |
| 67 |
| 68 spx_mem_t *mem_sp; /**< Synthesis signal memory */ |
| 69 spx_mem_t *mem_sp2; |
| 70 spx_mem_t *mem_sw; /**< Perceptual signal memory */ |
| 71 spx_word32_t *pi_gain; |
| 72 spx_word16_t *exc_rms; |
| 73 spx_word16_t *innov_rms_save; /**< If non-NULL, innovation is copied
here */ |
| 74 |
| 75 #ifndef DISABLE_VBR |
| 76 float vbr_quality; /**< Quality setting for VBR encoding */ |
| 77 int vbr_enabled; /**< 1 for enabling VBR, 0 otherwise */ |
| 78 spx_int32_t vbr_max; /**< Max bit-rate allowed in VBR mode (total)
*/ |
| 79 spx_int32_t vbr_max_high; /**< Max bit-rate allowed in VBR mode for the
high-band */ |
| 80 spx_int32_t abr_enabled; /**< ABR setting (in bps), 0 if off */ |
| 81 float abr_drift; |
| 82 float abr_drift2; |
| 83 float abr_count; |
| 84 int vad_enabled; /**< 1 for enabling VAD, 0 otherwise */ |
| 85 float relative_quality; |
| 86 #endif /* #ifndef DISABLE_VBR */ |
| 87 |
| 88 int encode_submode; |
| 89 const SpeexSubmode * const *submodes; |
| 90 int submodeID; |
| 91 int submodeSelect; |
| 92 int complexity; |
| 93 spx_int32_t sampling_rate; |
| 94 |
| 95 } SBEncState; |
| 96 |
| 97 |
| 98 /**Structure representing the full state of the sub-band decoder*/ |
| 99 typedef struct SBDecState { |
| 100 const SpeexMode *mode; /**< Pointer to the mode (containing for vt
able info) */ |
| 101 void *st_low; /**< State of the low-band (narrowband) encoder *
/ |
| 102 int full_frame_size; |
| 103 int frame_size; |
| 104 int subframeSize; |
| 105 int nbSubframes; |
| 106 int lpcSize; |
| 107 int first; |
| 108 spx_int32_t sampling_rate; |
| 109 int lpc_enh_enabled; |
| 110 |
| 111 char *stack; |
| 112 spx_word16_t *g0_mem, *g1_mem; |
| 113 |
| 114 spx_word16_t *excBuf; |
| 115 spx_lsp_t *old_qlsp; |
| 116 spx_coef_t *interp_qlpc; |
| 117 |
| 118 spx_mem_t *mem_sp; |
| 119 spx_word32_t *pi_gain; |
| 120 spx_word16_t *exc_rms; |
| 121 spx_word16_t *innov_save; /** If non-NULL, innovation is copied here */ |
| 122 |
| 123 spx_word16_t last_ener; |
| 124 spx_int32_t seed; |
| 125 |
| 126 int encode_submode; |
| 127 const SpeexSubmode * const *submodes; |
| 128 int submodeID; |
| 129 } SBDecState; |
| 130 |
| 131 |
| 132 /**Initializes encoder state*/ |
| 133 void *sb_encoder_init(const SpeexMode *m); |
| 134 |
| 135 /**De-allocates encoder state resources*/ |
| 136 void sb_encoder_destroy(void *state); |
| 137 |
| 138 /**Encodes one frame*/ |
| 139 int sb_encode(void *state, void *in, SpeexBits *bits); |
| 140 |
| 141 |
| 142 /**Initializes decoder state*/ |
| 143 void *sb_decoder_init(const SpeexMode *m); |
| 144 |
| 145 /**De-allocates decoder state resources*/ |
| 146 void sb_decoder_destroy(void *state); |
| 147 |
| 148 /**Decodes one frame*/ |
| 149 int sb_decode(void *state, SpeexBits *bits, void *out); |
| 150 |
| 151 int sb_encoder_ctl(void *state, int request, void *ptr); |
| 152 |
| 153 int sb_decoder_ctl(void *state, int request, void *ptr); |
| 154 |
| 155 #endif |
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