phi_lsfr.h
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上传日期:2007-02-02
资源大小:6116k
文件大小:3k
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 P. Kabal, McGill University,
- 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_LSFR.H */
- /* */
- /*======================================================================*/
- #ifndef _phi_lsfr_h_
- #define _phi_lsfr_h_
- #ifdef __cplusplus
- extern "C" {
- #endif
- void PHI_lsf2pc
- (
- long order, /* input : predictor order */
- const float lsf[], /* input : line-spectral freqs [0,pi] */
- float pc[] /* output: predictor coeff: a_1,a_2...a_order */
- );
- void PHI_pc2lsf( /* ret 1 on succ, 0 on failure */
- long np, /* input : order = # of freq to cal. */
- const float pc[], /* input : the np predictor coeff. */
- float lsf[] /* output: the np line spectral freq. */
- );
- #ifdef __cplusplus
- }
- #endif
- #endif /* #ifndef _phi_lsfr_h_ */