061991fe60
it appears a one-character typo in the cmake_minimum_required line prevents it from compiling under CMake 4.0. in order to fix that, I had to take this thing out of submodules... it is recommended to do this after you pull; git submodule deinit extern/libsndfile
130 lines
4.4 KiB
C
130 lines
4.4 KiB
C
/*
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* This source code is a product of Sun Microsystems, Inc. and is provided
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* for unrestricted use. Users may copy or modify this source code without
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* charge.
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*
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* SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING
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* THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun source code is provided with no support and without any obligation on
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* the part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#ifndef G72X_PRIVATE_H
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#define G72X_PRIVATE_H
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#ifdef __cplusplus
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#error "This code is not designed to be compiled with a C++ compiler."
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#endif
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/*
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** The following is the definition of the state structure used by the
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** G.721/G.723 encoder and decoder to preserve their internal state
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** between successive calls. The meanings of the majority of the state
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** structure fields are explained in detail in the CCITT Recommendation
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** G.721. The field names are essentially identical to variable names
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** in the bit level description of the coding algorithm included in this
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** Recommendation.
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*/
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struct g72x_state
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{ long yl ; /* Locked or steady state step size multiplier. */
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short yu ; /* Unlocked or non-steady state step size multiplier. */
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short dms ; /* Short term energy estimate. */
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short dml ; /* Long term energy estimate. */
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short ap ; /* Linear weighting coefficient of 'yl' and 'yu'. */
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short a [2] ; /* Coefficients of pole portion of prediction filter. */
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short b [6] ; /* Coefficients of zero portion of prediction filter. */
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short pk [2] ; /*
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** Signs of previous two samples of a partially
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** reconstructed signal.
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**/
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short dq [6] ; /*
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** Previous 6 samples of the quantized difference
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** signal represented in an internal floating point
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** format.
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**/
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short sr [2] ; /*
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** Previous 2 samples of the quantized difference
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** signal represented in an internal floating point
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** format.
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*/
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char td ; /* delayed tone detect, new in 1988 version */
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/* The following struct members were added for libsndfile. The original
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** code worked by calling a set of functions on a sample by sample basis
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** which is slow on architectures like Intel x86. For libsndfile, this
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** was changed so that the encoding and decoding routines could work on
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** a block of samples at a time to reduce the function call overhead.
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*/
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int (*encoder) (int, struct g72x_state* state) ;
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int (*decoder) (int, struct g72x_state* state) ;
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int codec_bits, blocksize, samplesperblock ;
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} ;
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typedef struct g72x_state G72x_STATE ;
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int predictor_zero (G72x_STATE *state_ptr) ;
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int predictor_pole (G72x_STATE *state_ptr) ;
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int step_size (G72x_STATE *state_ptr) ;
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int quantize (int d, int y, short *table, int size) ;
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int reconstruct (int sign, int dqln, int y) ;
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void update (int code_size, int y, int wi, int fi, int dq, int sr, int dqsez, G72x_STATE *state_ptr) ;
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int g721_encoder (int sample, G72x_STATE *state_ptr) ;
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int g721_decoder (int code, G72x_STATE *state_ptr) ;
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int g723_16_encoder (int sample, G72x_STATE *state_ptr) ;
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int g723_16_decoder (int code, G72x_STATE *state_ptr) ;
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int g723_24_encoder (int sample, G72x_STATE *state_ptr) ;
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int g723_24_decoder (int code, G72x_STATE *state_ptr) ;
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int g723_40_encoder (int sample, G72x_STATE *state_ptr) ;
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int g723_40_decoder (int code, G72x_STATE *state_ptr) ;
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void private_init_state (G72x_STATE *state_ptr) ;
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#if __GNUC__
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#define ALWAYS_INLINE __attribute__ ((always_inline))
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#elif defined _MSC_VER
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#define ALWAYS_INLINE __forceinline
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#else
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#define ALWAYS_INLINE
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#endif
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static inline int ALWAYS_INLINE
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arith_shift_left (int x, int shift)
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{ return (int) (((unsigned int) x) << shift) ;
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} /* arith_shift_left */
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static inline int ALWAYS_INLINE
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arith_shift_right (int x, int shift)
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{ if (x >= 0)
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return x << shift ;
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return ~ ((~x) << shift) ;
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} /* arith_shift_right */
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#endif /* G72X_PRIVATE_H */
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