jni/libsndfile-1.0.25/src/avr.c - jami-client-android - Gitiles

 /*
 ** Copyright (C) 2004-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
 **
 ** 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 "sfconfig.h"

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

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

 #define TWOBIT_MARKER	(MAKE_MARKER ('2', 'B', 'I', 'T'))
 #define	AVR_HDR_SIZE	128

 #define	SFE_AVR_X	666

 /*
 ** From: hyc@hanauma.Jpl.Nasa.Gov (Howard Chu)
 **
 ** A lot of PD software exists to play Mac .snd files on the ST. One other
 ** format that seems pretty popular (used by a number of commercial packages)
 ** is the AVR format (from Audio Visual Research). This format has a 128 byte
 ** header that looks like this (its actually packed, but thats not portable):
 */

 typedef struct
 {	int		marker ;	/* 2BIT */
 	char	name [8] ;	/* null-padded sample name */
 	short	mono ;		/* 0 = mono, 0xffff = stereo */
 	short	rez ;		/* 8 = 8 bit, 16 = 16 bit */
 	short	sign ;		/* 0 = unsigned, 0xffff = signed */

 	short	loop ;		/* 0 = no loop, 0xffff = looping sample */
 	short	midi ;		/* 0xffff = no MIDI note assigned,  */
 						/*	0xffXX = single key note assignment */
 						/*	0xLLHH = key split, low/hi note */
 	int		srate ;		/* sample frequency in hertz */
 	int		frames ;	/* sample length in bytes or words (see rez) */
 	int		lbeg ;		/* offset to start of loop in bytes or words. */
 						/* set to zero if unused */
 	int		lend ;		/* offset to end of loop in bytes or words. */
 						/* set to sample length if unused */
 	short	res1 ;		/* Reserved, MIDI keyboard split */
 	short	res2 ;		/* Reserved, sample compression */
 	short	res3 ;		/* Reserved */
 	char	ext [20] ;	/* Additional filename space, used if (name[7] != 0) */
 	char	user [64] ; /* User defined. Typically ASCII message */
 } AVR_HEADER ;

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

 static int		avr_close (SF_PRIVATE *psf) ;

 static int		avr_read_header (SF_PRIVATE *psf) ;
 static int		avr_write_header (SF_PRIVATE *psf, int calc_length) ;

 /*------------------------------------------------------------------------------
 ** Public function.
 */

 int
 avr_open	(SF_PRIVATE *psf)
 {	int		error = 0 ;

 	if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
 	{	if ((error = avr_read_header (psf)))
 			return error ;
 		} ;

 	if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_AVR)
 		return	SFE_BAD_OPEN_FORMAT ;

 	if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
 	{	psf->endian = SF_ENDIAN (psf->sf.format) ;
 		psf->endian = SF_ENDIAN_BIG ;

 		if (avr_write_header (psf, SF_FALSE))
 			return psf->error ;

 		psf->write_header = avr_write_header ;
 		} ;

 	psf->container_close = avr_close ;

 	psf->blockwidth = psf->bytewidth * psf->sf.channels ;

 	error = pcm_init (psf) ;

 	return error ;
 } /* avr_open */

 static int
 avr_read_header (SF_PRIVATE *psf)
 {	AVR_HEADER	hdr ;

 	memset (&hdr, 0, sizeof (hdr)) ;

 	psf_binheader_readf (psf, "pmb", 0, &hdr.marker, &hdr.name, sizeof (hdr.name)) ;
 	psf_log_printf (psf, "%M\n", hdr.marker) ;

 	if (hdr.marker != TWOBIT_MARKER)
 		return SFE_AVR_X ;

 	psf_log_printf (psf, "  Name        : %s\n", hdr.name) ;

 	psf_binheader_readf (psf, "E22222", &hdr.mono, &hdr.rez, &hdr.sign, &hdr.loop, &hdr.midi) ;

 	psf->sf.channels = (hdr.mono & 1) + 1 ;

 	psf_log_printf (psf, "  Channels    : %d\n  Bit width   : %d\n  Signed      : %s\n",
 			(hdr.mono & 1) + 1, hdr.rez, hdr.sign ? "yes" : "no") ;

 	switch ((hdr.rez << 16) + (hdr.sign & 1))
 	{	case ((8 << 16) + 0) :
 			psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_U8 ;
 			psf->bytewidth = 1 ;
 			break ;

 		case ((8 << 16) + 1) :
 			psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_S8 ;
 			psf->bytewidth = 1 ;
 			break ;

 		case ((16 << 16) + 1) :
 			psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_16 ;
 			psf->bytewidth = 2 ;
 			break ;

 		default :
 			psf_log_printf (psf, "Error : bad rez/sign combination.\n") ;
 			return SFE_AVR_X ;
 		} ;

 	psf_binheader_readf (psf, "E4444", &hdr.srate, &hdr.frames, &hdr.lbeg, &hdr.lend) ;

 	psf->sf.frames = hdr.frames ;
 	psf->sf.samplerate = hdr.srate ;

 	psf_log_printf (psf, "  Frames      : %D\n", psf->sf.frames) ;
 	psf_log_printf (psf, "  Sample rate : %d\n", psf->sf.samplerate) ;

 	psf_binheader_readf (psf, "E222", &hdr.res1, &hdr.res2, &hdr.res3) ;
 	psf_binheader_readf (psf, "bb", hdr.ext, sizeof (hdr.ext), hdr.user, sizeof (hdr.user)) ;

 	psf_log_printf (psf, "  Ext         : %s\n  User        : %s\n", hdr.ext, hdr.user) ;

 	psf->endian = SF_ENDIAN_BIG ;

  	psf->dataoffset = AVR_HDR_SIZE ;
 	psf->datalength = hdr.frames * (hdr.rez / 8) ;

 	if (psf->fileoffset > 0)
 		psf->filelength = AVR_HDR_SIZE + psf->datalength ;

 	if (psf_ftell (psf) != psf->dataoffset)
 		psf_binheader_readf (psf, "j", psf->dataoffset - psf_ftell (psf)) ;

 	psf->blockwidth = psf->sf.channels * psf->bytewidth ;

 	if (psf->sf.frames == 0 && psf->blockwidth)
 		psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;

 	return 0 ;
 } /* avr_read_header */

 static int
 avr_write_header (SF_PRIVATE *psf, int calc_length)
 {	sf_count_t	current ;
 	int			sign ;

 	if (psf->pipeoffset > 0)
 		return 0 ;

 	current = psf_ftell (psf) ;

 	if (calc_length)
 	{	psf->filelength = psf_get_filelen (psf) ;

 		psf->datalength = psf->filelength - psf->dataoffset ;
 		if (psf->dataend)
 			psf->datalength -= psf->filelength - psf->dataend ;

 		psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
 		} ;

 	/* Reset the current header length to zero. */
 	psf->header [0] = 0 ;
 	psf->headindex = 0 ;

 	/*
 	** Only attempt to seek if we are not writng to a pipe. If we are
 	** writing to a pipe we shouldn't be here anyway.
 	*/
 	if (psf->is_pipe == SF_FALSE)
 		psf_fseek (psf, 0, SEEK_SET) ;

 	psf_binheader_writef (psf, "Emz22", TWOBIT_MARKER, make_size_t (8),
 			psf->sf.channels == 2 ? 0xFFFF : 0, psf->bytewidth * 8) ;

 	sign = ((SF_CODEC (psf->sf.format)) == SF_FORMAT_PCM_U8) ? 0 : 0xFFFF ;

 	psf_binheader_writef (psf, "E222", sign, 0, 0xFFFF) ;
 	psf_binheader_writef (psf, "E4444", psf->sf.samplerate, psf->sf.frames, 0, 0) ;

 	psf_binheader_writef (psf, "E222zz", 0, 0, 0, make_size_t (20), make_size_t (64)) ;

 	/* Header construction complete so write it out. */
 	psf_fwrite (psf->header, psf->headindex, 1, psf) ;

 	if (psf->error)
 		return psf->error ;

 	psf->dataoffset = psf->headindex ;

 	if (current > 0)
 		psf_fseek (psf, current, SEEK_SET) ;

 	return psf->error ;
 } /* avr_write_header */

 static int
 avr_close (SF_PRIVATE *psf)
 {
 	if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
 		avr_write_header (psf, SF_TRUE) ;

 	return 0 ;
 } /* avr_close */
	/*
	** Copyright (C) 2004-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
	**
	** 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 "sfconfig.h"

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

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

	#define TWOBIT_MARKER (MAKE_MARKER ('2', 'B', 'I', 'T'))
	#define AVR_HDR_SIZE 128

	#define SFE_AVR_X 666

	/*
	** From: hyc@hanauma.Jpl.Nasa.Gov (Howard Chu)
	**
	** A lot of PD software exists to play Mac .snd files on the ST. One other
	** format that seems pretty popular (used by a number of commercial packages)
	** is the AVR format (from Audio Visual Research). This format has a 128 byte
	** header that looks like this (its actually packed, but thats not portable):
	*/

	typedef struct
	{ int marker ; /* 2BIT */
	char name [8] ; /* null-padded sample name */
	short mono ; /* 0 = mono, 0xffff = stereo */
	short rez ; /* 8 = 8 bit, 16 = 16 bit */
	short sign ; /* 0 = unsigned, 0xffff = signed */

	short loop ; /* 0 = no loop, 0xffff = looping sample */
	short midi ; /* 0xffff = no MIDI note assigned, */
	/* 0xffXX = single key note assignment */
	/* 0xLLHH = key split, low/hi note */
	int srate ; /* sample frequency in hertz */
	int frames ; /* sample length in bytes or words (see rez) */
	int lbeg ; /* offset to start of loop in bytes or words. */
	/* set to zero if unused */
	int lend ; /* offset to end of loop in bytes or words. */
	/* set to sample length if unused */
	short res1 ; /* Reserved, MIDI keyboard split */
	short res2 ; /* Reserved, sample compression */
	short res3 ; /* Reserved */
	char ext [20] ; /* Additional filename space, used if (name[7] != 0) */
	char user [64] ; /* User defined. Typically ASCII message */
	} AVR_HEADER ;

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

	static int avr_close (SF_PRIVATE *psf) ;

	static int avr_read_header (SF_PRIVATE *psf) ;
	static int avr_write_header (SF_PRIVATE *psf, int calc_length) ;

	/*------------------------------------------------------------------------------
	** Public function.
	*/

	int
	avr_open (SF_PRIVATE *psf)
	{ int error = 0 ;

	if (psf->file.mode == SFM_READ \|\| (psf->file.mode == SFM_RDWR && psf->filelength > 0))
	{ if ((error = avr_read_header (psf)))
	return error ;
	} ;

	if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_AVR)
	return SFE_BAD_OPEN_FORMAT ;

	if (psf->file.mode == SFM_WRITE \|\| psf->file.mode == SFM_RDWR)
	{ psf->endian = SF_ENDIAN (psf->sf.format) ;
	psf->endian = SF_ENDIAN_BIG ;

	if (avr_write_header (psf, SF_FALSE))
	return psf->error ;

	psf->write_header = avr_write_header ;
	} ;

	psf->container_close = avr_close ;

	psf->blockwidth = psf->bytewidth * psf->sf.channels ;

	error = pcm_init (psf) ;

	return error ;
	} /* avr_open */

	static int
	avr_read_header (SF_PRIVATE *psf)
	{ AVR_HEADER hdr ;

	memset (&hdr, 0, sizeof (hdr)) ;

	psf_binheader_readf (psf, "pmb", 0, &hdr.marker, &hdr.name, sizeof (hdr.name)) ;
	psf_log_printf (psf, "%M\n", hdr.marker) ;

	if (hdr.marker != TWOBIT_MARKER)
	return SFE_AVR_X ;

	psf_log_printf (psf, " Name : %s\n", hdr.name) ;

	psf_binheader_readf (psf, "E22222", &hdr.mono, &hdr.rez, &hdr.sign, &hdr.loop, &hdr.midi) ;

	psf->sf.channels = (hdr.mono & 1) + 1 ;

	psf_log_printf (psf, " Channels : %d\n Bit width : %d\n Signed : %s\n",
	(hdr.mono & 1) + 1, hdr.rez, hdr.sign ? "yes" : "no") ;

	switch ((hdr.rez << 16) + (hdr.sign & 1))
	{ case ((8 << 16) + 0) :
	psf->sf.format = SF_FORMAT_AVR \| SF_FORMAT_PCM_U8 ;
	psf->bytewidth = 1 ;
	break ;

	case ((8 << 16) + 1) :
	psf->sf.format = SF_FORMAT_AVR \| SF_FORMAT_PCM_S8 ;
	psf->bytewidth = 1 ;
	break ;

	case ((16 << 16) + 1) :
	psf->sf.format = SF_FORMAT_AVR \| SF_FORMAT_PCM_16 ;
	psf->bytewidth = 2 ;
	break ;

	default :
	psf_log_printf (psf, "Error : bad rez/sign combination.\n") ;
	return SFE_AVR_X ;
	} ;

	psf_binheader_readf (psf, "E4444", &hdr.srate, &hdr.frames, &hdr.lbeg, &hdr.lend) ;

	psf->sf.frames = hdr.frames ;
	psf->sf.samplerate = hdr.srate ;

	psf_log_printf (psf, " Frames : %D\n", psf->sf.frames) ;
	psf_log_printf (psf, " Sample rate : %d\n", psf->sf.samplerate) ;

	psf_binheader_readf (psf, "E222", &hdr.res1, &hdr.res2, &hdr.res3) ;
	psf_binheader_readf (psf, "bb", hdr.ext, sizeof (hdr.ext), hdr.user, sizeof (hdr.user)) ;

	psf_log_printf (psf, " Ext : %s\n User : %s\n", hdr.ext, hdr.user) ;

	psf->endian = SF_ENDIAN_BIG ;

	psf->dataoffset = AVR_HDR_SIZE ;
	psf->datalength = hdr.frames * (hdr.rez / 8) ;

	if (psf->fileoffset > 0)
	psf->filelength = AVR_HDR_SIZE + psf->datalength ;

	if (psf_ftell (psf) != psf->dataoffset)
	psf_binheader_readf (psf, "j", psf->dataoffset - psf_ftell (psf)) ;

	psf->blockwidth = psf->sf.channels * psf->bytewidth ;

	if (psf->sf.frames == 0 && psf->blockwidth)
	psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;

	return 0 ;
	} /* avr_read_header */

	static int
	avr_write_header (SF_PRIVATE *psf, int calc_length)
	{ sf_count_t current ;
	int sign ;

	if (psf->pipeoffset > 0)
	return 0 ;

	current = psf_ftell (psf) ;

	if (calc_length)
	{ psf->filelength = psf_get_filelen (psf) ;

	psf->datalength = psf->filelength - psf->dataoffset ;
	if (psf->dataend)
	psf->datalength -= psf->filelength - psf->dataend ;

	psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
	} ;

	/* Reset the current header length to zero. */
	psf->header [0] = 0 ;
	psf->headindex = 0 ;

	/*
	** Only attempt to seek if we are not writng to a pipe. If we are
	** writing to a pipe we shouldn't be here anyway.
	*/
	if (psf->is_pipe == SF_FALSE)
	psf_fseek (psf, 0, SEEK_SET) ;

	psf_binheader_writef (psf, "Emz22", TWOBIT_MARKER, make_size_t (8),
	psf->sf.channels == 2 ? 0xFFFF : 0, psf->bytewidth * 8) ;

	sign = ((SF_CODEC (psf->sf.format)) == SF_FORMAT_PCM_U8) ? 0 : 0xFFFF ;

	psf_binheader_writef (psf, "E222", sign, 0, 0xFFFF) ;
	psf_binheader_writef (psf, "E4444", psf->sf.samplerate, psf->sf.frames, 0, 0) ;

	psf_binheader_writef (psf, "E222zz", 0, 0, 0, make_size_t (20), make_size_t (64)) ;

	/* Header construction complete so write it out. */
	psf_fwrite (psf->header, psf->headindex, 1, psf) ;

	if (psf->error)
	return psf->error ;

	psf->dataoffset = psf->headindex ;

	if (current > 0)
	psf_fseek (psf, current, SEEK_SET) ;

	return psf->error ;
	} /* avr_write_header */

	static int
	avr_close (SF_PRIVATE *psf)
	{
	if (psf->file.mode == SFM_WRITE \|\| psf->file.mode == SFM_RDWR)
	avr_write_header (psf, SF_TRUE) ;

	return 0 ;
	} /* avr_close */