phi_axit.h
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上传日期:2007-02-02
资源大小:6116k
文件大小:6k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*====================================================================*/
- /* MPEG-4 Audio (ISO/IEC 14496-3) Copyright Header */
- /*====================================================================*/
- /*
- This software module was originally developed by Rakesh Taori and Andy
- Gerrits (Philips Research Laboratories, Eindhoven, The Netherlands) in
- the course of development of the MPEG-4 Audio (ISO/IEC 14496-3). This
- software module is an implementation of a part of one or more MPEG-4
- Audio (ISO/IEC 14496-3) tools as specified by the MPEG-4 Audio
- (ISO/IEC 14496-3). ISO/IEC gives users of the MPEG-4 Audio (ISO/IEC
- 14496-3) free license to this software module or modifications thereof
- for use in hardware or software products claiming conformance to the
- MPEG-4 Audio (ISO/IEC 14496-3). Those intending to use this software
- module in hardware or software products are advised that its use may
- infringe existing patents. The original developer of this software
- module and his/her company, the subsequent editors and their
- companies, and ISO/IEC have no liability for use of this software
- module or modifications thereof in an implementation. Copyright is not
- released for non MPEG-4 Audio (ISO/IEC 14496-3) conforming products.
- CN1 retains full right to use the code for his/her own purpose, assign
- or donate the code to a third party and to inhibit third parties from
- using the code for non MPEG-4 Audio (ISO/IEC 14496-3) conforming
- products. This copyright notice must be included in all copies or
- derivative works. Copyright 1996.
- */
- /*====================================================================*/
- /*======================================================================*/
- /* */
- /* INCLUDE_FILE: PHI_AXIT.H */
- /* PACKAGE: WDBxx */
- /* COMPONENT: Excitation Analysis Modules */
- /* */
- /*======================================================================*/
- #ifndef _phi_axit_h_
- #define _phi_axit_h_
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*======================================================================*/
- /* Function Prototype : PHI_init_excitation_analysis */
- /*======================================================================*/
- void
- PHI_init_excitation_analysis
- (
- const long max_lag, /* In:Maximum permitted lag in the adaptive cbk */
- const long lpc_order, /* In:The LPC order */
- const long sbfrm_size,/* In:Size of subframe in samples */
- const long RPE_configuration /* In:Confguration */
- );
- /*======================================================================*/
- /* Function Prototype : celp_excitation_analysis */
- /*======================================================================*/
- void celp_excitation_analysis
- (
- /* -----------------------------------*/
- /* INPUT PARAMETERS */
- /* -----------------------------------*/
- float PP_InputSignal[], /* Preprocessed Input signal */
- float lpc_residual[], /* Inverse Filtered Signal */
- float int_Qlpc_coefficients[], /* Interpolated LPC Coeffs */
- long lpc_order, /* Order of LPC */
- float Wnum_coeff[], /* Weighting Filter: Numerator */
- float Wden_coeff[], /* Weighting Filter: Denominator */
- float first_order_lpc_par, /* apar corresponding to 1st-order fit*/
- long lag_candidates[], /* Array of Lag candidates */
- long n_lag_candidates, /* Number of lag candidates */
- long frame_size, /* Number of samples in the frame */
- long sbfrm_size, /* Number of samples in the subframe */
- long n_subframes, /* Number of subframes */
- long signal_mode, /* Configuration Input */
- long frame_bit_allocation[], /* Configuration Input */
- /* -----------------------------------*/
- /* OUTPUT PARAMETERS */
- /* -----------------------------------*/
- long shape_indices[], /* Adaptive and Fixed codebook lags */
- long gain_indices[], /* Adaptive and Fixed codebook gains */
- long num_shape_cbks, /* Number of shape codebooks */
- long num_gain_cbks, /* Number of gain codebooks */
- long *rms_index, /* RMS Value ???? */
- float decoded_excitation[] /* Synthesised Signal */
- );
- /*======================================================================*/
- /* Function Prototype : PHI_close_excitation_analysis */
- /*======================================================================*/
- void PHI_close_excitation_analysis(void);
- #ifdef __cplusplus
- }
- #endif
- #endif /* #ifndef _phi_axit_h_ */
- /*======================================================================*/
- /* H I S T O R Y */
- /*======================================================================*/
- /* 17-04-96 R. Taori Initial Version */
- /* 30-06-96 R. Taori Modified interface to meet the MPEG-4 requirement*/
- /* 20-08-96 R. Taori Modified interface to accomodate Tampere results */