ref: 397265f5791291defa76487c2388e1898e2e433c
dir: /include/cst_sts.h/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2001 */
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/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: January 2001 */
/*************************************************************************/
/* */
/* Short term signals */
/* */
/*************************************************************************/
#ifndef _CST_STS_H__
#define _CST_STS_H__
/* Need some lower level functions in case we are doing streaming */
#include "cst_wave.h"
#include "cst_audio.h"
/* The short term signal (sts) structure is the basic unit data info */
/* it may be diphones or general units. Indexes and names are held */
/* else where, this information plus the indexes in the Unit relation */
/* allow reconstruction of the signal itself */
struct cst_sts_struct {
const unsigned short *frame;
const int size; /* in samples */
const unsigned char *residual;
};
typedef struct cst_sts_struct cst_sts;
/* Because many C compilers can't compile when there are 100Ks of symbols */
/* We store the sts in pages. Each page of stss gets compiled into an */
/* array in separate files thus reducing the number of symbols -- but */
/* introducing an extra dereference */
struct cst_sts_paged_struct {
/* const unsigned short frame_offset; */
const unsigned int frame_offset;
const unsigned short res_size;
const unsigned int res_offset;
const unsigned short *frame_page;
const unsigned char *res_page;
};
typedef struct cst_sts_paged_struct cst_sts_paged;
/* This represents a database of short-term signals. */
struct cst_sts_list_struct {
/* If the sts are compiled in, this will point to them. */
const cst_sts *sts;
/* Or if the data is paged in different structures */
const cst_sts_paged *sts_paged;
/* Or we could have these set (or set later) */
const unsigned short *frames;
const unsigned char *residuals;
const unsigned int *resoffs;
const unsigned char *ressizes;
int num_sts; /* But I don't think you need that number */
int num_channels; /* typically lpc order */
int sample_rate;
float coeff_min; /* used for decoding the short representation */
float coeff_range; /* for coefficients */
const char *codec; /* encoding type for residual */
};
typedef struct cst_sts_list_struct cst_sts_list;
/* This is used to represent a newly constructed waveform to be synthed */
struct cst_lpcres_struct {
const unsigned short **frames;
int *times;
int num_frames;
int num_channels;
float lpc_min;
float lpc_range;
int num_samples;
int sample_rate;
int *sizes;
unsigned char *residual;
/* Optional call back function */
cst_audio_streaming_info *asi;
/* Expensive decoding can be delayed until resynthesis, hence */
/* streaming will be more useful as the decoding will happen */
/* during playback time */
const unsigned char **packed_residuals;
int delayed_decoding; /* 1 if decoding happens at streaming time */
};
typedef struct cst_lpcres_struct cst_lpcres;
cst_lpcres *new_lpcres(void);
void delete_lpcres(cst_lpcres *l);
float lpcres_frame_shift(cst_lpcres *t, int frame);
void lpcres_resize_frames(cst_lpcres *l,int num_frames);
void lpcres_resize_samples(cst_lpcres *l,int num_samples);
cst_sts_list *new_sts_list(void);
void delete_sts_list(cst_sts_list *l);
const unsigned short * get_sts_frame(const cst_sts_list *sts_list, int frame);
const unsigned char * get_sts_residual(const cst_sts_list *sts_list, int frame);
const unsigned char * get_sts_residual_fixed(const cst_sts_list *sts_list, int frame);
int get_frame_size(const cst_sts_list *sts_list, int frame);
int get_unit_size(const cst_sts_list *s,int start, int end);
CST_VAL_USER_TYPE_DCLS(lpcres,cst_lpcres)
CST_VAL_USER_TYPE_DCLS(sts_list,cst_sts_list)
#endif