1 files changed, 254 insertions, 0 deletions
diff --git a/nylsf/avr.c b/nylsf/avr.c
new file mode 100644
index 0000000..ad02c04
--- /dev/null
+++ b/nylsf/avr.c
@@ -0,0 +1,254 @@
+/*
+** Copyright (C) 2004-2006 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->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
+	{	if ((error = avr_read_header (psf)))
+			return error ;
+		} ;
+
+	if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_AVR)
+		return	SFE_BAD_OPEN_FORMAT ;
+
+	if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
+	{	psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ;
+		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 = ((psf->sf.format & SF_FORMAT_SUBMASK) == 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->mode == SFM_WRITE || psf->mode == SFM_RDWR)
+		avr_write_header (psf, SF_TRUE) ;
+
+	return 0 ;
+} /* avr_close */
+
+/*
+** Do not edit or modify anything in this comment block.
+** The arch-tag line is a file identity tag for the GNU Arch
+** revision control system.
+**
+** arch-tag: 0823d454-f39a-4a28-a776-607f1ef33b52
+*/