aiff.c

radius协议源码÷The Radius Stack will connect to a Radius Server. This stack implementation is built upo

/*
** Copyright (C) 1999-2000 Erik de Castro Lopo <[e-mail]>
**  
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
** 
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU Lesser General Public License for more details.
** 
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software 
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/


#include	<stdio.h>
#include	<unistd.h>
#include	<string.h>
#include	<ctype.h>

#include	"sndfile.h"
#include	"config.h"
#include	"sfendian.h"
#include	"common.h"
#include	"pcm.h"


/*------------------------------------------------------------------------------
 * Macros to handle big/little endian issues.
 */

#if (CPU_IS_LITTLE_ENDIAN == 1)
	#define	MAKE_MARKER(a,b,c,d)		((a)|((b)<<8)|((c)<<16)|((d)<<24))
#elif (CPU_IS_BIG_ENDIAN == 1)
	#define	MAKE_MARKER(a,b,c,d)		(((a)<<24)|((b)<<16)|((c)<<8)|(d))
#else
	#error "Cannot determine endian-ness of processor."
#endif

#define FORM_MARKER	(MAKE_MARKER ('F', 'O', 'R', 'M')) 
#define AIFF_MARKER	(MAKE_MARKER ('A', 'I', 'F', 'F')) 
#define AIFC_MARKER	(MAKE_MARKER ('A', 'I', 'F', 'C')) 
#define COMM_MARKER	(MAKE_MARKER ('C', 'O', 'M', 'M')) 
#define SSND_MARKER	(MAKE_MARKER ('S', 'S', 'N', 'D')) 
#define MARK_MARKER	(MAKE_MARKER ('M', 'A', 'R', 'K')) 
#define INST_MARKER	(MAKE_MARKER ('I', 'N', 'S', 'T')) 
#define APPL_MARKER	(MAKE_MARKER ('A', 'P', 'P', 'L')) 

#define c_MARKER	(MAKE_MARKER ('(', 'c', ')', ' ')) 
#define NAME_MARKER	(MAKE_MARKER ('N', 'A', 'M', 'E')) 
#define AUTH_MARKER	(MAKE_MARKER ('A', 'U', 'T', 'H')) 
#define ANNO_MARKER	(MAKE_MARKER ('A', 'N', 'N', 'O')) 
#define FVER_MARKER	(MAKE_MARKER ('F', 'V', 'E', 'R')) 

#define NONE_MARKER	(MAKE_MARKER ('N', 'O', 'N', 'E')) 

#define	REAL_COMM_SIZE			(2+4+2+10)

/*------------------------------------------------------------------------------
 * Typedefs for file chunks.
 */

typedef struct
{	short			numChannels ;
	unsigned int	numSampleFrames ;
	short			sampleSize ;
	unsigned char	sampleRate [10] ;
} COMM_CHUNK ; 

typedef struct
{	unsigned int	offset ;
	unsigned int	blocksize ;
} SSND_CHUNK ; 


typedef struct 
{	short           playMode;
    int		        beginLoop;
	int		        endLoop;
} INST_CHUNK ;

/*------------------------------------------------------------------------------
 * Private static functions.
 */

static	int		aiff_close	(SF_PRIVATE  *psf) ;

static	int     tenbytefloat2int (unsigned char *bytes) ;
static	void	uint2tenbytefloat (unsigned int num, unsigned char *bytes) ;

static 
void    endswap_comm_fmt (COMM_CHUNK *comm)
{	comm->numChannels     = ENDSWAP_SHORT (comm->numChannels) ;
	comm->numSampleFrames = ENDSWAP_INT (comm->numSampleFrames) ;
	comm->sampleSize      = ENDSWAP_SHORT (comm->sampleSize) ;
} /* endswap_comm_fmt */

static 
void    endswap_ssnd_fmt (SSND_CHUNK *ssnd)
{	ssnd->offset 	= ENDSWAP_INT (ssnd->offset) ;
	ssnd->blocksize = ENDSWAP_INT (ssnd->blocksize) ;
} /* endswap_ssnd_fmt */


/*------------------------------------------------------------------------------
** Public functions.
*/

int 	aiff_open_read	(SF_PRIVATE *psf)
{	COMM_CHUNK	comm_fmt ;
	SSND_CHUNK	ssnd_fmt ;
	int			marker, dword ;
	long		FORMsize, commsize, SSNDsize ;
	int			filetype, parsestage = 0, done = 0 ;
	
	while (! done)
	{	fread (&marker, sizeof (marker), 1, psf->file) ;
		switch (marker)
		{	case FORM_MARKER :
					if (parsestage != 0)
						return SFE_AIFF_NO_FORM ;
					fread (&dword, sizeof (dword), 1, psf->file) ;
					FORMsize = BE2H_INT (dword) ;

					if (FORMsize != psf->filelength - 2 * sizeof (dword))
					{	dword = psf->filelength - 2 * sizeof (dword);
						psf_sprintf (psf, "FORM : %d (should be %d)\n", FORMsize, dword) ;
						FORMsize = dword ;
						}
					else
						psf_sprintf (psf, "FORM : %d\n", FORMsize) ;
					parsestage = 1 ;
					break ;
					
			case AIFC_MARKER :
			case AIFF_MARKER :
					if (parsestage != 1)
						return SFE_AIFF_NO_FORM ;
					filetype = marker ;
					psf_sprintf (psf, " %D\n", marker) ;
					parsestage = 2 ;
					break ;

			case COMM_MARKER :
					if (parsestage != 2)
						return SFE_AIFF_NO_FORM ;
					fread (&dword, sizeof (dword), 1, psf->file) ;
					commsize = BE2H_INT (dword) ;
					
					/* The COMM chunk has an int aligned to a word boundary. Some procesors 
					** are not able to deal with this (ie bus fault) so we have to take
					** special care.
					*/

					fread (&(comm_fmt.numChannels), sizeof (comm_fmt.numChannels), 1, psf->file) ;
					fread (&(comm_fmt.numSampleFrames), sizeof (comm_fmt.numSampleFrames), 1, psf->file) ;
					fread (&(comm_fmt.sampleSize), sizeof (comm_fmt.sampleSize), 1, psf->file) ;
					fread (&(comm_fmt.sampleRate), sizeof (comm_fmt.sampleRate), 1, psf->file) ;

					if (CPU_IS_LITTLE_ENDIAN)
						endswap_comm_fmt (&comm_fmt) ;

					psf->sf.samplerate 		= tenbytefloat2int (comm_fmt.sampleRate) ;
					psf->sf.samples 		= comm_fmt.numSampleFrames ;
					psf->sf.channels 		= comm_fmt.numChannels ;
					psf->sf.pcmbitwidth 	= comm_fmt.sampleSize ;
					psf->sf.format 			= (SF_FORMAT_AIFF | SF_FORMAT_PCM);
					psf->sf.sections 		= 1 ;
					
					psf_sprintf (psf, " COMM : %d\n", commsize) ;
					psf_sprintf (psf, "  Sample Rate : %d\n", psf->sf.samplerate) ;
					psf_sprintf (psf, "  Samples     : %d\n", comm_fmt.numSampleFrames) ;
					psf_sprintf (psf, "  Channels    : %d\n", comm_fmt.numChannels) ;
					psf_sprintf (psf, "  Sample Size : %d\n", comm_fmt.sampleSize) ;
					
					if (commsize > REAL_COMM_SIZE)
					{	fread (&dword, sizeof (dword), 1, psf->file) ;
						if (dword != NONE_MARKER)
						{	psf_sprintf (psf, "AIFC : Unimplemented format : %D\n", dword) ;
							return SFE_UNIMPLEMENTED ;
							} ;
						fseek (psf->file, commsize - (long) (sizeof (dword) + REAL_COMM_SIZE), SEEK_CUR) ;
						} ;
					
					parsestage = 3 ;
					break ;

			case SSND_MARKER :
					if (parsestage != 3)
						return SFE_AIFF_NO_SSND ;
					fread (&dword, sizeof (dword), 1, psf->file) ;
					SSNDsize = BE2H_INT (dword) ;
					
					fread (&ssnd_fmt, sizeof (SSND_CHUNK), 1, psf->file) ;
					if (CPU_IS_LITTLE_ENDIAN)
						endswap_ssnd_fmt (&ssnd_fmt) ;
						
					psf->dataoffset = ftell (psf->file) ;
					psf->datalength = psf->filelength - psf->dataoffset ;
					if (SSNDsize != psf->datalength + sizeof (SSND_CHUNK))
						psf_sprintf (psf, " SSND : %d (should be %d)\n", SSNDsize, psf->datalength + sizeof (SSND_CHUNK)) ;
					else
						psf_sprintf (psf, " SSND : %d\n", SSNDsize) ;
					
					psf_sprintf (psf, "  Offset     : %d\n", ssnd_fmt.offset) ;
					psf_sprintf (psf, "  Block Size : %d\n", ssnd_fmt.blocksize) ;
					

					fseek (psf->file, psf->datalength, SEEK_CUR) ;
					dword = ftell (psf->file) ;
					if (dword != (off_t) (psf->dataoffset + psf->datalength))
						psf_sprintf (psf, "*** fseek past end error ***\n", dword, psf->dataoffset + psf->datalength) ;
					parsestage = 4 ;
					break ;

			case NAME_MARKER :
			case AUTH_MARKER :
			case ANNO_MARKER :
			case c_MARKER :
			case FVER_MARKER :
					if (parsestage < 2)
						return SFE_AIFF_NO_FORM ;
					fread (&dword, sizeof (dword), 1, psf->file) ;
					dword = BE2H_INT (dword) ;
					psf_sprintf (psf, " %D : %d\n", marker, dword) ;
					fseek (psf->file, dword, SEEK_CUR) ;					
					break ;

			case MARK_MARKER :
			case INST_MARKER :
			case APPL_MARKER :
					if (parsestage < 2)
						return SFE_AIFF_NO_FORM ;
					fread (&dword, sizeof (dword), 1, psf->file) ;
					dword = BE2H_INT (dword) ;
					psf_sprintf (psf, " %D : %d\n", marker, dword) ;
					fseek (psf->file, dword, SEEK_CUR) ;					
					break ;

			default : 
					if (isprint ((marker >> 24) & 0xFF) && isprint ((marker >> 16) & 0xFF)
						&& isprint ((marker >> 8) & 0xFF) && isprint (marker & 0xFF))
					{	fread (&dword, sizeof (dword), 1, psf->file) ;
						psf_sprintf (psf, "%D : %d (unknown marker)\n", marker, dword) ;
						fseek (psf->file, dword, SEEK_CUR) ;
						break ;
						} ;
					if ((dword = ftell (psf->file)) & 0x03)
					{	psf_sprintf (psf, "  Unknown chunk marker at position %d. Resynching.\n", dword - 4) ;
						fseek (psf->file, -3, SEEK_CUR) ;
						break ;
						} ;
					psf_sprintf (psf, "*** Unknown chunk marker : %X. Exiting parser.\n", marker) ;