/*
 * libiax: An implementation of the Inter-Asterisk eXchange protocol
 *
 * Asterisk internal frame definitions.
 * 
 * Copyright (C) 1999, Mark Spencer
 *
 * Mark Spencer <markster@linux-support.net>
 *
 * This program is free software, distributed under the terms of
 * the GNU Lesser General Public License.  Other components of
 * Asterisk are distributed under The GNU General Public License
 * only.
 */

#ifndef _LIBIAX_FRAME_H
#define _LIBIAX_FRAME_H

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

/* Frame types */
#define AST_FRAME_DTMF		1		/* A DTMF digit, subclass is the digit */
#define AST_FRAME_VOICE		2		/* Voice data, subclass is AST_FORMAT_* */
#define AST_FRAME_VIDEO		3		/* Video frame, maybe?? :) */
#define AST_FRAME_CONTROL	4		/* A control frame, subclass is AST_CONTROL_* */
#define AST_FRAME_NULL		5		/* An empty, useless frame */
#define AST_FRAME_IAX		6		/* Inter Aterisk Exchange private frame type */
#define AST_FRAME_TEXT		7		/* Text messages */
#define AST_FRAME_IMAGE		8		/* Image Frames */
#define AST_FRAME_HTML		9		/* HTML Frames */
#define AST_FRAME_CNG           10		/* Comfort Noise frame (subclass is level of CNG in -dBov) */

/* HTML subclasses */
#define AST_HTML_URL		1		/* Sending a URL */
#define AST_HTML_DATA		2		/* Data frame */
#define AST_HTML_BEGIN		4		/* Beginning frame */
#define AST_HTML_END		8		/* End frame */
#define AST_HTML_LDCOMPLETE	16		/* Load is complete */
#define AST_HTML_NOSUPPORT	17		/* Peer is unable to support HTML */
#define AST_HTML_LINKURL	18		/* Send URL and track */
#define AST_HTML_UNLINK		19		/* Request no more linkage */
#define AST_HTML_LINKREJECT	20		/* Reject LINKURL */

/* Data formats for capabilities and frames alike */
/*! G.723.1 compression */
#define AST_FORMAT_G723_1       (1 << 0)
	/*! GSM compression */
#define AST_FORMAT_GSM          (1 << 1)
	/*! Raw mu-law data (G.711) */
#define AST_FORMAT_ULAW         (1 << 2)
	/*! Raw A-law data (G.711) */
#define AST_FORMAT_ALAW         (1 << 3)
	/*! ADPCM (G.726, 32kbps) */
#define AST_FORMAT_G726         (1 << 4)
	/*! ADPCM (IMA) */
#define AST_FORMAT_ADPCM        (1 << 5)
	/*! Raw 16-bit Signed Linear (8000 Hz) PCM */
#define AST_FORMAT_SLINEAR      (1 << 6)
	/*! LPC10, 180 samples/frame */
#define AST_FORMAT_LPC10        (1 << 7)
	/*! G.729A audio */
#define AST_FORMAT_G729A        (1 << 8)
	/*! SpeeX Free Compression */
#define AST_FORMAT_SPEEX        (1 << 9)
	/*! iLBC Free Compression */
#define AST_FORMAT_ILBC         (1 << 10)
	/*! Maximum audio format */
#define AST_FORMAT_MAX_AUDIO    (1 << 15)
	/*! JPEG Images */
#define AST_FORMAT_JPEG         (1 << 16)
	/*! PNG Images */
#define AST_FORMAT_PNG          (1 << 17)
	/*! H.261 Video */
#define AST_FORMAT_H261         (1 << 18)
	/*! H.263 Video */
#define AST_FORMAT_H263         (1 << 19)
	/*! Max one */
#define AST_FORMAT_MAX_VIDEO    (1 << 24)

/* Control frame types */
#define AST_CONTROL_HANGUP		1			/* Other end has hungup */
#define AST_CONTROL_RING		2			/* Local ring */
#define AST_CONTROL_RINGING 	3			/* Remote end is ringing */
#define AST_CONTROL_ANSWER		4			/* Remote end has answered */
#define AST_CONTROL_BUSY		5			/* Remote end is busy */
#define AST_CONTROL_TAKEOFFHOOK 6			/* Make it go off hook */
#define AST_CONTROL_OFFHOOK		7			/* Line is off hook */
#define AST_CONTROL_CONGESTION	8			/* Congestion (circuits busy) */
#define AST_CONTROL_FLASH		9			/* Flash hook */
#define AST_CONTROL_WINK		10			/* Wink */
#define AST_CONTROL_OPTION		11			/* Set an option */

#define AST_FRIENDLY_OFFSET		64			/* Reserved header space */

struct ast_frame {
        /*! Kind of frame */
        int frametype;
        /*! Subclass, frame dependent */
        int subclass;
        /*! Length of data */
        int datalen;
        /*! Number of 8khz samples in this frame */
        int samples;
        /*! Was the data malloc'd?  i.e. should we free it when we discard the f
rame? */
        int mallocd;
        /*! How far into "data" the data really starts */
        int offset;
        /*! Optional source of frame for debugging */
        char *src;
        /*! Pointer to actual data */
        void *data;
        /*! Next/Prev for linking stand alone frames */
        struct ast_frame *prev;
       /*! Next/Prev for linking stand alone frames */
        struct ast_frame *next;
                                                                /* Unused except
 if debugging is turned on, but left
                                                                   in the struct
 so that it can be turned on without
                                                                   requiring a r
ecompile of the whole thing */
};



#if defined(__cplusplus) || defined(c_plusplus)
}
#endif


#endif