e8482f24cf
Added contrib configure Made wxSocket sample compile Made OGL compile Modified main configure to pass some more parameter to children Changed the wxProcess doc according to the modification Still some win makefiles to come git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6461 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
124 lines
4.1 KiB
C
124 lines
4.1 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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/*
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* g72x.h
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*
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* Header file for CCITT conversion routines.
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*
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*/
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#ifndef _G72X_H
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#define _G72X_H
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#define AUDIO_ENCODING_ULAW (1) /* ISDN u-law */
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#define AUDIO_ENCODING_ALAW (2) /* ISDN A-law */
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#define AUDIO_ENCODING_LINEAR (3) /* PCM 2's-complement (0-center) */
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/*
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* The following is the definition of the state structure
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* used by the G.721/G.723 encoder and decoder to preserve their internal
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* state between successive calls. The meanings of the majority
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* of the state structure fields are explained in detail in the
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* CCITT Recommendation G.721. The field names are essentially indentical
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* to variable names in the bit level description of the coding algorithm
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* included in this 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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};
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/* External function definitions. */
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extern unsigned char linear2alaw (int pcm_val); /* 2's complement (16-bit range) */
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extern int alaw2linear (unsigned char a_val);
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extern unsigned char linear2ulaw (int pcm_val); /* 2's complement (16-bit range) */
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extern int ulaw2linear (unsigned char u_val);
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extern int predictor_zero (struct g72x_state *state_ptr);
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extern int predictor_pole (struct g72x_state *state_ptr);
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extern int step_size (struct g72x_state *state_ptr);
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extern int quantize (int d, int y, short *table, int size);
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extern int reconstruct (int sign, int dqln, int y);
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extern void update
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( int code_size, int y, int wi, int fi, int dq
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, int sr, int dqsez, struct g72x_state *state_ptr);
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int tandem_adjust_alaw
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(int sr, int se, int y, int i, int sign, short *qtab);
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int tandem_adjust_ulaw
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(int sr, int se, int y, int i, int sign, short *qtab);
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extern void g72x_init_state (struct g72x_state *);
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extern int g721_encoder(
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int sample,
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int in_coding,
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struct g72x_state *state_ptr);
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extern int g721_decoder(
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int code,
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int out_coding,
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struct g72x_state *state_ptr);
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extern int g723_24_encoder(
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int sample,
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int in_coding,
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struct g72x_state *state_ptr);
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extern int g723_24_decoder(
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int code,
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int out_coding,
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struct g72x_state *state_ptr);
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extern int g723_40_encoder(
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int sample,
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int in_coding,
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struct g72x_state *state_ptr);
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extern int g723_40_decoder(
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int code,
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int out_coding,
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struct g72x_state *state_ptr);
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#endif /* !_G72X_H */
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