Tarball conversion

1 files changed, 322 insertions, 0 deletions

diff --git a/src/ircam.c b/src/ircam.c
new file mode 100644
index 0000000..4aa1173
--- /dev/null
+++ b/src/ircam.c
@@ -0,0 +1,322 @@
+/*
+** Copyright (C) 2001-2011 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	<fcntl.h>
+#include	<string.h>
+#include	<ctype.h>
+
+#include	"sndfile.h"
+#include	"sfendian.h"
+#include	"common.h"
+
+/*------------------------------------------------------------------------------
+** Macros to handle big/little endian issues.
+*/
+
+/* The IRCAM magic number is weird in that one byte in the number can have
+** values of 0x1, 0x2, 0x03 or 0x04. Hence the need for a marker and a mask.
+*/
+
+#define IRCAM_BE_MASK		(MAKE_MARKER (0xFF, 0xFF, 0x00, 0xFF))
+#define IRCAM_BE_MARKER		(MAKE_MARKER (0x64, 0xA3, 0x00, 0x00))
+
+#define IRCAM_LE_MASK		(MAKE_MARKER (0xFF, 0x00, 0xFF, 0xFF))
+#define IRCAM_LE_MARKER		(MAKE_MARKER (0x00, 0x00, 0xA3, 0x64))
+
+#define IRCAM_02B_MARKER	(MAKE_MARKER (0x64, 0xA3, 0x02, 0x00))
+#define IRCAM_03L_MARKER	(MAKE_MARKER (0x64, 0xA3, 0x03, 0x00))
+
+#define IRCAM_DATA_OFFSET	(1024)
+
+/*------------------------------------------------------------------------------
+** Typedefs.
+*/
+
+enum
+{	IRCAM_PCM_16	= 0x00002,
+	IRCAM_FLOAT		= 0x00004,
+	IRCAM_ALAW		= 0x10001,
+	IRCAM_ULAW		= 0x20001,
+	IRCAM_PCM_32	= 0x40004
+} ;
+
+
+/*------------------------------------------------------------------------------
+** Private static functions.
+*/
+
+static	int		ircam_close			(SF_PRIVATE *psf) ;
+static	int		ircam_write_header	(SF_PRIVATE *psf, int calc_length) ;
+static	int		ircam_read_header	(SF_PRIVATE *psf) ;
+
+static	int		get_encoding (int subformat) ;
+
+static	const char*	get_encoding_str (int encoding) ;
+
+/*------------------------------------------------------------------------------
+** Public function.
+*/
+
+int
+ircam_open	(SF_PRIVATE *psf)
+{	int		subformat ;
+	int		error = SFE_NO_ERROR ;
+
+	if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
+	{	if ((error = ircam_read_header (psf)))
+			return error ;
+		} ;
+
+	subformat = SF_CODEC (psf->sf.format) ;
+
+	if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
+	{	if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_IRCAM)
+			return	SFE_BAD_OPEN_FORMAT ;
+
+		psf->endian = SF_ENDIAN (psf->sf.format) ;
+		if (psf->endian == 0 || psf->endian == SF_ENDIAN_CPU)
+			psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ;
+
+	 	psf->dataoffset = IRCAM_DATA_OFFSET ;
+
+		if ((error = ircam_write_header (psf, SF_FALSE)))
+			return error ;
+
+		psf->write_header = ircam_write_header ;
+		} ;
+
+	psf->container_close = ircam_close ;
+
+	switch (subformat)
+	{	case SF_FORMAT_ULAW :		/* 8-bit Ulaw encoding. */
+				error = ulaw_init (psf) ;
+				break ;
+
+		case SF_FORMAT_ALAW :		/* 8-bit Alaw encoding. */
+				error = alaw_init (psf) ;
+				break ;
+
+		case SF_FORMAT_PCM_16 :	/* 16-bit linear PCM. */
+		case SF_FORMAT_PCM_32 :	/* 32-bit linear PCM. */
+				error = pcm_init (psf) ;
+				break ;
+
+		case SF_FORMAT_FLOAT :	/* 32-bit linear PCM. */
+				error = float32_init (psf) ;
+				break ;
+
+		default : break ;
+		} ;
+
+	return error ;
+} /* ircam_open */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+ircam_read_header	(SF_PRIVATE *psf)
+{	unsigned int	marker, encoding ;
+	float			samplerate ;
+	int				error = SFE_NO_ERROR ;
+
+	psf_binheader_readf (psf, "epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
+
+	if (((marker & IRCAM_BE_MASK) != IRCAM_BE_MARKER) && ((marker & IRCAM_LE_MASK) != IRCAM_LE_MARKER))
+	{	psf_log_printf (psf, "marker: 0x%X\n", marker) ;
+		return SFE_IRCAM_NO_MARKER ;
+		} ;
+
+	psf->endian = SF_ENDIAN_LITTLE ;
+
+	if (psf->sf.channels > 256)
+	{	psf_binheader_readf (psf, "Epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
+
+		/* Sanity checking for endian-ness detection. */
+		if (psf->sf.channels > 256)
+		{	psf_log_printf (psf, "marker: 0x%X\n", marker) ;
+			return SFE_IRCAM_BAD_CHANNELS ;
+			} ;
+
+		psf->endian = SF_ENDIAN_BIG ;
+		} ;
+
+	psf_log_printf (psf, "marker: 0x%X\n", marker) ;
+
+	psf->sf.samplerate = (int) samplerate ;
+
+	psf_log_printf (psf, "  Sample Rate : %d\n"
+						 "  Channels    : %d\n"
+						 "  Encoding    : %X => %s\n", psf->sf.samplerate, psf->sf.channels, encoding, get_encoding_str (encoding)) ;
+
+	switch (encoding)
+	{	case IRCAM_PCM_16 :
+				psf->bytewidth = 2 ;
+				psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+				psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_16 ;
+				break ;
+
+		case IRCAM_PCM_32 :
+				psf->bytewidth = 4 ;
+				psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+				psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_32 ;
+				break ;
+
+		case IRCAM_FLOAT :
+				psf->bytewidth = 4 ;
+				psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+				psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_FLOAT ;
+				break ;
+
+		case IRCAM_ALAW :
+				psf->bytewidth = 1 ;
+				psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+				psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ALAW ;
+				break ;
+
+		case IRCAM_ULAW :
+				psf->bytewidth = 1 ;
+				psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+				psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ULAW ;
+				break ;
+
+		default :
+				error = SFE_IRCAM_UNKNOWN_FORMAT ;
+				break ;
+		} ;
+
+	if (psf->endian == SF_ENDIAN_BIG)
+		psf->sf.format |= SF_ENDIAN_BIG ;
+	else
+		psf->sf.format |= SF_ENDIAN_LITTLE ;
+
+	if (error)
+		return error ;
+
+	psf->dataoffset = IRCAM_DATA_OFFSET ;
+	psf->datalength = psf->filelength - psf->dataoffset ;
+
+	if (psf->sf.frames == 0 && psf->blockwidth)
+		psf->sf.frames = psf->datalength / psf->blockwidth ;
+
+	psf_log_printf (psf, "  Samples     : %d\n", psf->sf.frames) ;
+
+	psf_binheader_readf (psf, "p", IRCAM_DATA_OFFSET) ;
+
+	return 0 ;
+} /* ircam_read_header */
+
+static int
+ircam_close	(SF_PRIVATE *psf)
+{
+	psf_log_printf (psf, "close\n") ;
+
+	return 0 ;
+} /* ircam_close */
+
+static int
+ircam_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
+{	int			encoding ;
+	float		samplerate ;
+	sf_count_t	current ;
+
+	if (psf->pipeoffset > 0)
+		return 0 ;
+
+	current = psf_ftell (psf) ;
+
+	/* This also sets psf->endian. */
+	encoding = get_encoding (SF_CODEC (psf->sf.format)) ;
+
+	if (encoding == 0)
+		return SFE_BAD_OPEN_FORMAT ;
+
+	/* Reset the current header length to zero. */
+	psf->header [0] = 0 ;
+	psf->headindex = 0 ;
+
+	if (psf->is_pipe == SF_FALSE)
+		psf_fseek (psf, 0, SEEK_SET) ;
+
+	samplerate = psf->sf.samplerate ;
+
+	switch (psf->endian)
+	{	case SF_ENDIAN_BIG :
+			psf_binheader_writef (psf, "Emf", IRCAM_02B_MARKER, samplerate) ;
+			psf_binheader_writef (psf, "E44", psf->sf.channels, encoding) ;
+			break ;
+
+		case SF_ENDIAN_LITTLE :
+			psf_binheader_writef (psf, "emf", IRCAM_03L_MARKER, samplerate) ;
+			psf_binheader_writef (psf, "e44", psf->sf.channels, encoding) ;
+			break ;
+
+		default : return SFE_BAD_OPEN_FORMAT ;
+		} ;
+
+	psf_binheader_writef (psf, "z", (size_t) (IRCAM_DATA_OFFSET - psf->headindex)) ;
+
+	/* Header construction complete so write it out. */
+	psf_fwrite (psf->header, psf->headindex, 1, psf) ;
+
+	if (psf->error)
+		return psf->error ;
+
+	if (current > 0)
+		psf_fseek (psf, current, SEEK_SET) ;
+
+	return psf->error ;
+} /* ircam_write_header */
+
+static int
+get_encoding (int subformat)
+{	switch (subformat)
+	{	case SF_FORMAT_PCM_16 :	return IRCAM_PCM_16 ;
+		case SF_FORMAT_PCM_32 :	return IRCAM_PCM_32 ;
+
+		case SF_FORMAT_FLOAT :	return IRCAM_FLOAT ;
+
+		case SF_FORMAT_ULAW :	return IRCAM_ULAW ;
+		case SF_FORMAT_ALAW :	return IRCAM_ALAW ;
+
+		default : break ;
+		} ;
+
+	return 0 ;
+} /* get_encoding */
+
+static const char*
+get_encoding_str (int encoding)
+{	switch (encoding)
+	{	case IRCAM_PCM_16	: return "16 bit PCM" ;
+		case IRCAM_FLOAT	: return "32 bit float" ;
+		case IRCAM_ALAW		: return "A law" ;
+		case IRCAM_ULAW		: return "u law" ;
+		case IRCAM_PCM_32	: return "32 bit PCM" ;
+		} ;
+	return "Unknown encoding" ;
+} /* get_encoding_str */
+