1 /************************************************************************ 2 * Copyright (C) 2002-2009, Xiph.org Foundation 3 * Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following disclaimer 14 * in the documentation and/or other materials provided with the 15 * distribution. 16 * * Neither the names of the Xiph.org Foundation nor Pinknoise 17 * Productions Ltd nor the names of its contributors may be used to 18 * endorse or promote products derived from this software without 19 * specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 ************************************************************************ 33 34 function: libvorbis codec headers 35 36 ************************************************************************/ 37 38 #ifndef _V_CODECI_H_ 39 #define _V_CODECI_H_ 40 41 #define CHUNKSIZE 1024 42 43 #include "codebook.h" 44 #include "ivorbiscodec.h" 45 46 #define VI_TRANSFORMB 1 47 #define VI_WINDOWB 1 48 #define VI_TIMEB 1 49 #define VI_FLOORB 2 50 #define VI_RESB 3 51 #define VI_MAPB 1 52 53 typedef void vorbis_info_floor; 54 55 /* vorbis_dsp_state buffers the current vorbis audio 56 analysis/synthesis state. The DSP state belongs to a specific 57 logical bitstream ****************************************************/ 58 struct vorbis_dsp_state{ 59 vorbis_info *vi; 60 oggpack_buffer opb; 61 62 ogg_int32_t **work; 63 ogg_int32_t **mdctright; 64 int out_begin; 65 int out_end; 66 67 long lW; 68 long W; 69 70 ogg_int64_t granulepos; 71 ogg_int64_t sequence; 72 ogg_int64_t sample_count; 73 74 }; 75 76 77 /* Floor backend generic *****************************************/ 78 79 extern vorbis_info_floor *floor0_info_unpack(vorbis_info *,oggpack_buffer *); 80 extern void floor0_free_info(vorbis_info_floor *); 81 extern int floor0_memosize(vorbis_info_floor *); 82 extern ogg_int32_t *floor0_inverse1(struct vorbis_dsp_state *, 83 vorbis_info_floor *,ogg_int32_t *); 84 extern int floor0_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *, 85 ogg_int32_t *buffer,ogg_int32_t *); 86 87 extern vorbis_info_floor *floor1_info_unpack(vorbis_info *,oggpack_buffer *); 88 extern void floor1_free_info(vorbis_info_floor *); 89 extern int floor1_memosize(vorbis_info_floor *); 90 extern ogg_int32_t *floor1_inverse1(struct vorbis_dsp_state *, 91 vorbis_info_floor *,ogg_int32_t *); 92 extern int floor1_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *, 93 ogg_int32_t *buffer,ogg_int32_t *); 94 95 typedef struct{ 96 int order; 97 long rate; 98 long barkmap; 99 100 int ampbits; 101 int ampdB; 102 103 int numbooks; /* <= 16 */ 104 char books[16]; 105 106 } vorbis_info_floor0; 107 108 typedef struct{ 109 char class_dim; /* 1 to 8 */ 110 char class_subs; /* 0,1,2,3 (bits: 1<<n poss) */ 111 unsigned char class_book; /* subs ^ dim entries */ 112 unsigned char class_subbook[8]; /* [VIF_CLASS][subs] */ 113 } floor1class; 114 115 typedef struct{ 116 floor1class *klass; /* [VIF_CLASS] */ 117 ogg_uint8_t *partitionclass; /* [VIF_PARTS]; 0 to 15 */ 118 ogg_uint16_t *postlist; /* [VIF_POSIT+2]; first two implicit */ 119 ogg_uint8_t *forward_index; /* [VIF_POSIT+2]; */ 120 ogg_uint8_t *hineighbor; /* [VIF_POSIT]; */ 121 ogg_uint8_t *loneighbor; /* [VIF_POSIT]; */ 122 123 int partitions; /* 0 to 31 */ 124 int posts; 125 int mult; /* 1 2 3 or 4 */ 126 127 } vorbis_info_floor1; 128 129 /* Residue backend generic *****************************************/ 130 131 typedef struct vorbis_info_residue{ 132 int type; 133 unsigned char *stagemasks; 134 unsigned char *stagebooks; 135 136 /* block-partitioned VQ coded straight residue */ 137 long begin; 138 long end; 139 140 /* first stage (lossless partitioning) */ 141 int grouping; /* group n vectors per partition */ 142 char partitions; /* possible codebooks for a partition */ 143 unsigned char groupbook; /* huffbook for partitioning */ 144 char stages; 145 } vorbis_info_residue; 146 147 extern void res_clear_info(vorbis_info_residue *info); 148 extern int res_unpack(vorbis_info_residue *info, 149 vorbis_info *vi,oggpack_buffer *opb); 150 extern int res_inverse(vorbis_dsp_state *,vorbis_info_residue *info, 151 ogg_int32_t **in,int *nonzero,int ch); 152 153 /* mode ************************************************************/ 154 typedef struct { 155 unsigned char blockflag; 156 unsigned char mapping; 157 } vorbis_info_mode; 158 159 /* Mapping backend generic *****************************************/ 160 typedef struct coupling_step{ 161 unsigned char mag; 162 unsigned char ang; 163 } coupling_step; 164 165 typedef struct submap{ 166 char floor; 167 char residue; 168 } submap; 169 170 typedef struct vorbis_info_mapping{ 171 int submaps; 172 173 unsigned char *chmuxlist; 174 submap *submaplist; 175 176 int coupling_steps; 177 coupling_step *coupling; 178 } vorbis_info_mapping; 179 180 extern int mapping_info_unpack(vorbis_info_mapping *,vorbis_info *, 181 oggpack_buffer *); 182 extern void mapping_clear_info(vorbis_info_mapping *); 183 extern int mapping_inverse(struct vorbis_dsp_state *,vorbis_info_mapping *); 184 185 /* codec_setup_info contains all the setup information specific to the 186 specific compression/decompression mode in progress (eg, 187 psychoacoustic settings, channel setup, options, codebook 188 etc). 189 *********************************************************************/ 190 191 typedef struct codec_setup_info { 192 193 /* Vorbis supports only short and long blocks, but allows the 194 encoder to choose the sizes */ 195 196 long blocksizes[2]; 197 198 /* modes are the primary means of supporting on-the-fly different 199 blocksizes, different channel mappings (LR or M/A), 200 different residue backends, etc. Each mode consists of a 201 blocksize flag and a mapping (along with the mapping setup */ 202 203 int modes; 204 int maps; 205 int floors; 206 int residues; 207 int books; 208 209 vorbis_info_mode *mode_param; 210 vorbis_info_mapping *map_param; 211 char *floor_type; 212 vorbis_info_floor **floor_param; 213 vorbis_info_residue *residue_param; 214 codebook *book_param; 215 216 } codec_setup_info; 217 218 extern int vorbis_dsp_init(vorbis_dsp_state *v, vorbis_info *vi); 219 extern void vorbis_dsp_clear(vorbis_dsp_state *v); 220 extern vorbis_dsp_state *vorbis_dsp_create(vorbis_info *vi); 221 extern void vorbis_dsp_destroy(vorbis_dsp_state *v); 222 extern int vorbis_dsp_headerin(vorbis_info *vi,vorbis_comment *vc, 223 ogg_packet *op); 224 225 extern int vorbis_dsp_restart(vorbis_dsp_state *v); 226 extern int vorbis_dsp_synthesis(vorbis_dsp_state *vd, 227 ogg_packet *op,int decodep); 228 extern int vorbis_dsp_pcmout(vorbis_dsp_state *v, 229 ogg_int16_t *pcm,int samples); 230 extern int vorbis_dsp_read(vorbis_dsp_state *v,int samples); 231 extern long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op); 232 233 234 235 #endif 236
