diff src/libsndfile-1.0.27/src/wve.c @ 40:1df64224f5ac

Current libsndfile source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libsndfile-1.0.27/src/wve.c	Tue Oct 18 13:22:47 2016 +0100
@@ -0,0 +1,209 @@
+/*
+** Copyright (C) 2002-2011 Erik de Castro Lopo <[e-mail]>
+** Copyright (C) 2007 Reuben Thomas
+**
+** 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, and other magic numbers.
+*/
+
+#define ALAW_MARKER			MAKE_MARKER ('A', 'L', 'a', 'w')
+#define SOUN_MARKER			MAKE_MARKER ('S', 'o', 'u', 'n')
+#define DFIL_MARKER			MAKE_MARKER ('d', 'F', 'i', 'l')
+#define ESSN_MARKER			MAKE_MARKER ('e', '*', '*', '\0')
+#define PSION_VERSION		((unsigned short) 3856)
+#define PSION_DATAOFFSET	0x20
+
+/*------------------------------------------------------------------------------
+** Private static functions.
+*/
+
+static int	wve_read_header (SF_PRIVATE *psf) ;
+static int	wve_write_header (SF_PRIVATE *psf, int calc_length) ;
+static int	wve_close (SF_PRIVATE *psf) ;
+
+/*------------------------------------------------------------------------------
+** Public function.
+*/
+
+int
+wve_open (SF_PRIVATE *psf)
+{	int	error = 0 ;
+
+	if (psf->is_pipe)
+		return SFE_WVE_NO_PIPE ;
+
+	if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
+	{	if ((error = wve_read_header (psf)))
+			return error ;
+		} ;
+
+	if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
+	{	if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_WVE)
+			return	SFE_BAD_OPEN_FORMAT ;
+
+		psf->endian = SF_ENDIAN_BIG ;
+
+		if ((error = wve_write_header (psf, SF_FALSE)))
+			return error ;
+
+		psf->write_header = wve_write_header ;
+		} ;
+
+	psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+
+	psf->container_close = wve_close ;
+
+	error = alaw_init (psf) ;
+
+	return error ;
+} /* wve_open */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+wve_read_header (SF_PRIVATE *psf)
+{	int marker ;
+	unsigned short version, padding, repeats, trash ;
+	unsigned datalength ;
+
+	/* Set position to start of file to begin reading header. */
+	psf_binheader_readf (psf, "pm", 0, &marker) ;
+	if (marker != ALAW_MARKER)
+	{	psf_log_printf (psf, "Could not find '%M'\n", ALAW_MARKER) ;
+		return SFE_WVE_NOT_WVE ;
+		} ;
+
+	psf_binheader_readf (psf, "m", &marker) ;
+	if (marker != SOUN_MARKER)
+	{	psf_log_printf (psf, "Could not find '%M'\n", SOUN_MARKER) ;
+		return SFE_WVE_NOT_WVE ;
+		} ;
+
+	psf_binheader_readf (psf, "m", &marker) ;
+	if (marker != DFIL_MARKER)
+	{	psf_log_printf (psf, "Could not find '%M'\n", DFIL_MARKER) ;
+		return SFE_WVE_NOT_WVE ;
+		} ;
+
+	psf_binheader_readf (psf, "m", &marker) ;
+	if (marker != ESSN_MARKER)
+	{	psf_log_printf (psf, "Could not find '%M'\n", ESSN_MARKER) ;
+		return SFE_WVE_NOT_WVE ;
+		} ;
+
+	psf_binheader_readf (psf, "E2", &version) ;
+
+	psf_log_printf (psf, "Psion Palmtop Alaw (.wve)\n"
+			"  Sample Rate : 8000\n"
+			"  Channels    : 1\n"
+			"  Encoding    : A-law\n") ;
+
+	if (version != PSION_VERSION)
+		psf_log_printf (psf, "Psion version %d should be %d\n", version, PSION_VERSION) ;
+
+	psf_binheader_readf (psf, "E4", &datalength) ;
+	psf->dataoffset = PSION_DATAOFFSET ;
+	if (datalength != psf->filelength - psf->dataoffset)
+	{	psf->datalength = psf->filelength - psf->dataoffset ;
+		psf_log_printf (psf, "Data length %d should be %D\n", datalength, psf->datalength) ;
+		}
+	else
+		psf->datalength = datalength ;
+
+	psf_binheader_readf (psf, "E22222", &padding, &repeats, &trash, &trash, &trash) ;
+
+	psf->sf.format		= SF_FORMAT_WVE | SF_FORMAT_ALAW ;
+	psf->sf.samplerate	= 8000 ;
+	psf->sf.frames		= psf->datalength ;
+	psf->sf.channels	= 1 ;
+
+	return SFE_NO_ERROR ;
+} /* wve_read_header */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+wve_write_header (SF_PRIVATE *psf, int calc_length)
+{	sf_count_t	current ;
+	unsigned datalen ;
+
+	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 ;
+	psf_fseek (psf, 0, SEEK_SET) ;
+
+	/* Write header. */
+	datalen = psf->datalength ;
+	psf_binheader_writef (psf, "Emmmm", ALAW_MARKER, SOUN_MARKER, DFIL_MARKER, ESSN_MARKER) ;
+	psf_binheader_writef (psf, "E2422222", PSION_VERSION, datalen, 0, 0, 0, 0, 0) ;
+	psf_fwrite (psf->header, psf->headindex, 1, psf) ;
+
+	if (psf->sf.channels != 1)
+		return SFE_CHANNEL_COUNT ;
+
+	if (psf->error)
+		return psf->error ;
+
+	psf->dataoffset = psf->headindex ;
+
+	if (current > 0)
+		psf_fseek (psf, current, SEEK_SET) ;
+
+	return psf->error ;
+} /* wve_write_header */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+wve_close (SF_PRIVATE *psf)
+{
+	if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
+	{	/*  Now we know for certain the length of the file we can re-write
+		**	the header.
+		*/
+		wve_write_header (psf, SF_TRUE) ;
+		} ;
+
+	return 0 ;
+} /* wve_close */