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214 lines
6.6 KiB
C
214 lines
6.6 KiB
C
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/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
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* *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
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* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
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* *
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********************************************************************
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function: libvorbis codec headers
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********************************************************************/
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#ifndef _V_CODECI_H_
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#define _V_CODECI_H_
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#define CHUNKSIZE 1024
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#include "codebook.h"
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#include "ivorbiscodec.h"
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#define VI_TRANSFORMB 1
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#define VI_WINDOWB 1
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#define VI_TIMEB 1
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#define VI_FLOORB 2
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#define VI_RESB 3
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#define VI_MAPB 1
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typedef void vorbis_info_floor;
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/* vorbis_dsp_state buffers the current vorbis audio
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analysis/synthesis state. The DSP state belongs to a specific
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logical bitstream ****************************************************/
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struct vorbis_dsp_state{
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vorbis_info *vi;
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oggpack_buffer opb;
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ogg_int32_t **work;
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ogg_int32_t **mdctright;
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int out_begin;
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int out_end;
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long lW;
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long W;
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ogg_int64_t granulepos;
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ogg_int64_t sequence;
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ogg_int64_t sample_count;
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};
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/* Floor backend generic *****************************************/
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extern vorbis_info_floor *floor0_info_unpack(vorbis_info *,oggpack_buffer *);
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extern void floor0_free_info(vorbis_info_floor *);
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extern int floor0_memosize(vorbis_info_floor *);
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extern ogg_int32_t *floor0_inverse1(struct vorbis_dsp_state *,
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vorbis_info_floor *,ogg_int32_t *);
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extern int floor0_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *,
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ogg_int32_t *buffer,ogg_int32_t *);
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extern vorbis_info_floor *floor1_info_unpack(vorbis_info *,oggpack_buffer *);
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extern void floor1_free_info(vorbis_info_floor *);
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extern int floor1_memosize(vorbis_info_floor *);
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extern ogg_int32_t *floor1_inverse1(struct vorbis_dsp_state *,
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vorbis_info_floor *,ogg_int32_t *);
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extern int floor1_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *,
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ogg_int32_t *buffer,ogg_int32_t *);
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typedef struct{
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int order;
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long rate;
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long barkmap;
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int ampbits;
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int ampdB;
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int numbooks; /* <= 16 */
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char books[16];
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} vorbis_info_floor0;
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typedef struct{
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char class_dim; /* 1 to 8 */
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char class_subs; /* 0,1,2,3 (bits: 1<<n poss) */
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unsigned char class_book; /* subs ^ dim entries */
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unsigned char class_subbook[8]; /* [VIF_CLASS][subs] */
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} floor1class;
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typedef struct{
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floor1class *class; /* [VIF_CLASS] */
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char *partitionclass; /* [VIF_PARTS]; 0 to 15 */
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ogg_uint16_t *postlist; /* [VIF_POSIT+2]; first two implicit */
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char *forward_index; /* [VIF_POSIT+2]; */
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char *hineighbor; /* [VIF_POSIT]; */
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char *loneighbor; /* [VIF_POSIT]; */
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int partitions; /* 0 to 31 */
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int posts;
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int mult; /* 1 2 3 or 4 */
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} vorbis_info_floor1;
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/* Residue backend generic *****************************************/
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typedef struct vorbis_info_residue{
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int type;
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unsigned char *stagemasks;
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unsigned char *stagebooks;
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/* block-partitioned VQ coded straight residue */
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long begin;
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long end;
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/* first stage (lossless partitioning) */
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int grouping; /* group n vectors per partition */
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char partitions; /* possible codebooks for a partition */
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unsigned char groupbook; /* huffbook for partitioning */
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char stages;
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} vorbis_info_residue;
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extern void res_clear_info(vorbis_info_residue *info);
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extern int res_unpack(vorbis_info_residue *info,
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vorbis_info *vi,oggpack_buffer *opb);
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extern int res_inverse(vorbis_dsp_state *,vorbis_info_residue *info,
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ogg_int32_t **in,int *nonzero,int ch);
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/* mode ************************************************************/
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typedef struct {
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unsigned char blockflag;
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unsigned char mapping;
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} vorbis_info_mode;
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/* Mapping backend generic *****************************************/
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typedef struct coupling_step{
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unsigned char mag;
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unsigned char ang;
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} coupling_step;
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typedef struct submap{
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char floor;
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char residue;
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} submap;
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typedef struct vorbis_info_mapping{
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int submaps;
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unsigned char *chmuxlist;
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submap *submaplist;
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int coupling_steps;
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coupling_step *coupling;
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} vorbis_info_mapping;
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extern int mapping_info_unpack(vorbis_info_mapping *,vorbis_info *,
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oggpack_buffer *);
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extern void mapping_clear_info(vorbis_info_mapping *);
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extern int mapping_inverse(struct vorbis_dsp_state *,vorbis_info_mapping *);
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/* codec_setup_info contains all the setup information specific to the
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specific compression/decompression mode in progress (eg,
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psychoacoustic settings, channel setup, options, codebook
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etc).
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*********************************************************************/
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typedef struct codec_setup_info {
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/* Vorbis supports only short and long blocks, but allows the
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encoder to choose the sizes */
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long blocksizes[2];
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/* modes are the primary means of supporting on-the-fly different
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blocksizes, different channel mappings (LR or M/A),
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different residue backends, etc. Each mode consists of a
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blocksize flag and a mapping (along with the mapping setup */
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int modes;
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int maps;
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int floors;
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int residues;
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int books;
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vorbis_info_mode *mode_param;
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vorbis_info_mapping *map_param;
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char *floor_type;
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vorbis_info_floor **floor_param;
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vorbis_info_residue *residue_param;
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codebook *book_param;
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} codec_setup_info;
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extern vorbis_dsp_state *vorbis_dsp_create(vorbis_info *vi);
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extern void vorbis_dsp_destroy(vorbis_dsp_state *v);
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extern int vorbis_dsp_headerin(vorbis_info *vi,vorbis_comment *vc,
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ogg_packet *op);
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extern int vorbis_dsp_restart(vorbis_dsp_state *v);
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extern int vorbis_dsp_synthesis(vorbis_dsp_state *vd,
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ogg_packet *op,int decodep);
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extern int vorbis_dsp_pcmout(vorbis_dsp_state *v,
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ogg_int16_t *pcm,int samples);
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extern int vorbis_dsp_read(vorbis_dsp_state *v,int samples);
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extern long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op);
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#endif
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