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167 lines
5.3 KiB
C
167 lines
5.3 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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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 SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
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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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last mod: $Id: codec_internal.h 16227 2009-07-08 06:58:46Z xiphmont $
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********************************************************************/
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#ifndef _V_CODECI_H_
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#define _V_CODECI_H_
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#include "envelope.h"
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#include "codebook.h"
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#define BLOCKTYPE_IMPULSE 0
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#define BLOCKTYPE_PADDING 1
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#define BLOCKTYPE_TRANSITION 0
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#define BLOCKTYPE_LONG 1
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#define PACKETBLOBS 15
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typedef struct vorbis_block_internal{
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float **pcmdelay; /* this is a pointer into local storage */
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float ampmax;
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int blocktype;
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oggpack_buffer *packetblob[PACKETBLOBS]; /* initialized, must be freed;
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blob [PACKETBLOBS/2] points to
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the oggpack_buffer in the
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main vorbis_block */
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} vorbis_block_internal;
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typedef void vorbis_look_floor;
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typedef void vorbis_look_residue;
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typedef void vorbis_look_transform;
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/* mode ************************************************************/
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typedef struct {
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int blockflag;
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int windowtype;
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int transformtype;
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int mapping;
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} vorbis_info_mode;
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typedef void vorbis_info_floor;
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typedef void vorbis_info_residue;
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typedef void vorbis_info_mapping;
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#include "psy.h"
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#include "bitrate.h"
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typedef struct private_state {
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/* local lookup storage */
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envelope_lookup *ve; /* envelope lookup */
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int window[2];
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vorbis_look_transform **transform[2]; /* block, type */
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drft_lookup fft_look[2];
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int modebits;
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vorbis_look_floor **flr;
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vorbis_look_residue **residue;
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vorbis_look_psy *psy;
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vorbis_look_psy_global *psy_g_look;
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/* local storage, only used on the encoding side. This way the
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application does not need to worry about freeing some packets'
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memory and not others'; packet storage is always tracked.
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Cleared next call to a _dsp_ function */
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unsigned char *header;
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unsigned char *header1;
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unsigned char *header2;
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bitrate_manager_state bms;
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ogg_int64_t sample_count;
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} private_state;
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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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#include "highlevel.h"
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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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int psys; /* encode only */
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vorbis_info_mode *mode_param[64];
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int map_type[64];
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vorbis_info_mapping *map_param[64];
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int floor_type[64];
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vorbis_info_floor *floor_param[64];
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int residue_type[64];
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vorbis_info_residue *residue_param[64];
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static_codebook *book_param[256];
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codebook *fullbooks;
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vorbis_info_psy *psy_param[4]; /* encode only */
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vorbis_info_psy_global psy_g_param;
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bitrate_manager_info bi;
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highlevel_encode_setup hi; /* used only by vorbisenc.c. It's a
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highly redundant structure, but
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improves clarity of program flow. */
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int halfrate_flag; /* painless downsample for decode */
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} codec_setup_info;
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extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi);
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extern void _vp_global_free(vorbis_look_psy_global *look);
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typedef struct {
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int sorted_index[VIF_POSIT+2];
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int forward_index[VIF_POSIT+2];
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int reverse_index[VIF_POSIT+2];
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int hineighbor[VIF_POSIT];
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int loneighbor[VIF_POSIT];
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int posts;
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int n;
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int quant_q;
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vorbis_info_floor1 *vi;
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long phrasebits;
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long postbits;
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long frames;
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} vorbis_look_floor1;
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extern int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look,
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const float *logmdct, /* in */
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const float *logmask);
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extern int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look,
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int *A,int *B,
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int del);
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extern int floor1_encode(oggpack_buffer *opb,vorbis_block *vb,
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vorbis_look_floor1 *look,
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int *post,int *ilogmask);
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#endif
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