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Diffstat (limited to 'Tremolo/codec_internal.h')
| -rw-r--r-- | Tremolo/codec_internal.h | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/Tremolo/codec_internal.h b/Tremolo/codec_internal.h new file mode 100644 index 0000000..6b3085b --- /dev/null +++ b/Tremolo/codec_internal.h @@ -0,0 +1,215 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * + * * + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * + * * + * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 * + * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * + * * + ******************************************************************** + + function: libvorbis codec headers + + ********************************************************************/ + +#ifndef _V_CODECI_H_ +#define _V_CODECI_H_ + +#define CHUNKSIZE 1024 + +#include "codebook.h" +#include "ivorbiscodec.h" + +#define VI_TRANSFORMB 1 +#define VI_WINDOWB 1 +#define VI_TIMEB 1 +#define VI_FLOORB 2 +#define VI_RESB 3 +#define VI_MAPB 1 + +typedef void vorbis_info_floor; + +/* vorbis_dsp_state buffers the current vorbis audio + analysis/synthesis state. The DSP state belongs to a specific + logical bitstream ****************************************************/ +struct vorbis_dsp_state{ + vorbis_info *vi; + oggpack_buffer opb; + + ogg_int32_t **work; + ogg_int32_t **mdctright; + int out_begin; + int out_end; + + long lW; + long W; + + ogg_int64_t granulepos; + ogg_int64_t sequence; + ogg_int64_t sample_count; + +}; + + +/* Floor backend generic *****************************************/ + +extern vorbis_info_floor *floor0_info_unpack(vorbis_info *,oggpack_buffer *); +extern void floor0_free_info(vorbis_info_floor *); +extern int floor0_memosize(vorbis_info_floor *); +extern ogg_int32_t *floor0_inverse1(struct vorbis_dsp_state *, + vorbis_info_floor *,ogg_int32_t *); +extern int floor0_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *, + ogg_int32_t *buffer,ogg_int32_t *); + +extern vorbis_info_floor *floor1_info_unpack(vorbis_info *,oggpack_buffer *); +extern void floor1_free_info(vorbis_info_floor *); +extern int floor1_memosize(vorbis_info_floor *); +extern ogg_int32_t *floor1_inverse1(struct vorbis_dsp_state *, + vorbis_info_floor *,ogg_int32_t *); +extern int floor1_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *, + ogg_int32_t *buffer,ogg_int32_t *); + +typedef struct{ + int order; + long rate; + long barkmap; + + int ampbits; + int ampdB; + + int numbooks; /* <= 16 */ + char books[16]; + +} vorbis_info_floor0; + +typedef struct{ + char class_dim; /* 1 to 8 */ + char class_subs; /* 0,1,2,3 (bits: 1<<n poss) */ + unsigned char class_book; /* subs ^ dim entries */ + unsigned char class_subbook[8]; /* [VIF_CLASS][subs] */ +} floor1class; + +typedef struct{ + floor1class *class; /* [VIF_CLASS] */ + char *partitionclass; /* [VIF_PARTS]; 0 to 15 */ + ogg_uint16_t *postlist; /* [VIF_POSIT+2]; first two implicit */ + char *forward_index; /* [VIF_POSIT+2]; */ + char *hineighbor; /* [VIF_POSIT]; */ + char *loneighbor; /* [VIF_POSIT]; */ + + int partitions; /* 0 to 31 */ + int posts; + int mult; /* 1 2 3 or 4 */ + +} vorbis_info_floor1; + +/* Residue backend generic *****************************************/ + +typedef struct vorbis_info_residue{ + int type; + unsigned char *stagemasks; + unsigned char *stagebooks; + +/* block-partitioned VQ coded straight residue */ + long begin; + long end; + + /* first stage (lossless partitioning) */ + int grouping; /* group n vectors per partition */ + char partitions; /* possible codebooks for a partition */ + unsigned char groupbook; /* huffbook for partitioning */ + char stages; +} vorbis_info_residue; + +extern void res_clear_info(vorbis_info_residue *info); +extern int res_unpack(vorbis_info_residue *info, + vorbis_info *vi,oggpack_buffer *opb); +extern int res_inverse(vorbis_dsp_state *,vorbis_info_residue *info, + ogg_int32_t **in,int *nonzero,int ch); + +/* mode ************************************************************/ +typedef struct { + unsigned char blockflag; + unsigned char mapping; +} vorbis_info_mode; + +/* Mapping backend generic *****************************************/ +typedef struct coupling_step{ + unsigned char mag; + unsigned char ang; +} coupling_step; + +typedef struct submap{ + char floor; + char residue; +} submap; + +typedef struct vorbis_info_mapping{ + int submaps; + + unsigned char *chmuxlist; + submap *submaplist; + + int coupling_steps; + coupling_step *coupling; +} vorbis_info_mapping; + +extern int mapping_info_unpack(vorbis_info_mapping *,vorbis_info *, + oggpack_buffer *); +extern void mapping_clear_info(vorbis_info_mapping *); +extern int mapping_inverse(struct vorbis_dsp_state *,vorbis_info_mapping *); + +/* codec_setup_info contains all the setup information specific to the + specific compression/decompression mode in progress (eg, + psychoacoustic settings, channel setup, options, codebook + etc). +*********************************************************************/ + +typedef struct codec_setup_info { + + /* Vorbis supports only short and long blocks, but allows the + encoder to choose the sizes */ + + long blocksizes[2]; + + /* modes are the primary means of supporting on-the-fly different + blocksizes, different channel mappings (LR or M/A), + different residue backends, etc. Each mode consists of a + blocksize flag and a mapping (along with the mapping setup */ + + int modes; + int maps; + int floors; + int residues; + int books; + + vorbis_info_mode *mode_param; + vorbis_info_mapping *map_param; + char *floor_type; + vorbis_info_floor **floor_param; + vorbis_info_residue *residue_param; + codebook *book_param; + +} codec_setup_info; + +extern int vorbis_dsp_init(vorbis_dsp_state *v, vorbis_info *vi); +extern void vorbis_dsp_clear(vorbis_dsp_state *v); +extern vorbis_dsp_state *vorbis_dsp_create(vorbis_info *vi); +extern void vorbis_dsp_destroy(vorbis_dsp_state *v); +extern int vorbis_dsp_headerin(vorbis_info *vi,vorbis_comment *vc, + ogg_packet *op); + +extern int vorbis_dsp_restart(vorbis_dsp_state *v); +extern int vorbis_dsp_synthesis(vorbis_dsp_state *vd, + ogg_packet *op,int decodep); +extern int vorbis_dsp_pcmout(vorbis_dsp_state *v, + ogg_int16_t *pcm,int samples); +extern int vorbis_dsp_read(vorbis_dsp_state *v,int samples); +extern long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op); + + + +#endif |