--- /dev/null
+/*
+** Copyright (C) 2002-2011 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.
+*/
+
+#define PVF1_MARKER (MAKE_MARKER ('P', 'V', 'F', '1'))
+
+/*------------------------------------------------------------------------------
+** Private static functions.
+*/
+
+static int pvf_close (SF_PRIVATE *psf) ;
+
+static int pvf_write_header (SF_PRIVATE *psf, int calc_length) ;
+static int pvf_read_header (SF_PRIVATE *psf) ;
+
+/*------------------------------------------------------------------------------
+** Public function.
+*/
+
+int
+pvf_open (SF_PRIVATE *psf)
+{ int subformat ;
+ int error = 0 ;
+
+ if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
+ { if ((error = pvf_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_PVF)
+ return SFE_BAD_OPEN_FORMAT ;
+
+ psf->endian = SF_ENDIAN_BIG ;
+
+ if (pvf_write_header (psf, SF_FALSE))
+ return psf->error ;
+
+ psf->write_header = pvf_write_header ;
+ } ;
+
+ psf->container_close = pvf_close ;
+
+ psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+
+ switch (subformat)
+ { case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */
+ case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
+ case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
+ error = pcm_init (psf) ;
+ break ;
+
+ default : break ;
+ } ;
+
+ return error ;
+} /* pvf_open */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+pvf_close (SF_PRIVATE * UNUSED (psf))
+{
+ return 0 ;
+} /* pvf_close */
+
+static int
+pvf_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
+{ sf_count_t current ;
+
+ if (psf->pipeoffset > 0)
+ return 0 ;
+
+ current = psf_ftell (psf) ;
+
+ /* 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) ;
+
+ snprintf ((char*) psf->header, sizeof (psf->header), "PVF1\n%d %d %d\n",
+ psf->sf.channels, psf->sf.samplerate, psf->bytewidth * 8) ;
+
+ psf->headindex = strlen ((char*) psf->header) ;
+
+ /* 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 ;
+} /* pvf_write_header */
+
+static int
+pvf_read_header (SF_PRIVATE *psf)
+{ char buffer [32] ;
+ int marker, channels, samplerate, bitwidth ;
+
+ psf_binheader_readf (psf, "pmj", 0, &marker, 1) ;
+ psf_log_printf (psf, "%M\n", marker) ;
+
+ if (marker != PVF1_MARKER)
+ return SFE_PVF_NO_PVF1 ;
+
+ /* Grab characters up until a newline which is replaced by an EOS. */
+ psf_binheader_readf (psf, "G", buffer, sizeof (buffer)) ;
+
+ if (sscanf (buffer, "%d %d %d", &channels, &samplerate, &bitwidth) != 3)
+ return SFE_PVF_BAD_HEADER ;
+
+ psf_log_printf (psf, " Channels : %d\n Sample rate : %d\n Bit width : %d\n",
+ channels, samplerate, bitwidth) ;
+
+ psf->sf.channels = channels ;
+ psf->sf.samplerate = samplerate ;
+
+ switch (bitwidth)
+ { case 8 :
+ psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_S8 ;
+ psf->bytewidth = 1 ;
+ break ;
+
+ case 16 :
+ psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_16 ;
+ psf->bytewidth = 2 ;
+ break ;
+ case 32 :
+ psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_32 ;
+ psf->bytewidth = 4 ;
+ break ;
+
+ default :
+ return SFE_PVF_BAD_BITWIDTH ;
+ } ;
+
+ psf->dataoffset = psf_ftell (psf) ;
+ psf_log_printf (psf, " Data Offset : %D\n", psf->dataoffset) ;
+
+ psf->endian = SF_ENDIAN_BIG ;
+
+ psf->datalength = psf->filelength - psf->dataoffset ;
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ if (! psf->sf.frames && psf->blockwidth)
+ psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
+
+ return 0 ;
+} /* pvf_read_header */
projects / Faustine.git / blobdiff