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add libsndifle 1.0.17 to in tree libs
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3761 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Michael Jerris
199
libs/libsndfile/src/pvf.c
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199
libs/libsndfile/src/pvf.c
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/*
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** Copyright (C) 2002-2004 Erik de Castro Lopo <erikd@mega-nerd.com>
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU Lesser General Public License as published by
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** the Free Software Foundation; either version 2.1 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "sfconfig.h"
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <ctype.h>
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#include "sndfile.h"
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#include "sfendian.h"
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#include "common.h"
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/*------------------------------------------------------------------------------
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** Macros to handle big/little endian issues.
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*/
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#define PVF1_MARKER (MAKE_MARKER ('P', 'V', 'F', '1'))
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/*------------------------------------------------------------------------------
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** Private static functions.
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*/
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static int pvf_close (SF_PRIVATE *psf) ;
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static int pvf_write_header (SF_PRIVATE *psf, int calc_length) ;
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static int pvf_read_header (SF_PRIVATE *psf) ;
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/*------------------------------------------------------------------------------
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** Public function.
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*/
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int
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pvf_open (SF_PRIVATE *psf)
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{ int subformat ;
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int error = 0 ;
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if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
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{ if ((error = pvf_read_header (psf)))
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return error ;
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} ;
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subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
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if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
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{ if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_PVF)
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return SFE_BAD_OPEN_FORMAT ;
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psf->endian = SF_ENDIAN_BIG ;
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if (pvf_write_header (psf, SF_FALSE))
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return psf->error ;
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psf->write_header = pvf_write_header ;
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} ;
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psf->container_close = pvf_close ;
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psf->blockwidth = psf->bytewidth * psf->sf.channels ;
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switch (subformat)
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{ case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */
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case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
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case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
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error = pcm_init (psf) ;
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break ;
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default : break ;
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} ;
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return error ;
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} /* pvf_open */
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/*------------------------------------------------------------------------------
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*/
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static int
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pvf_close (SF_PRIVATE *psf)
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{
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psf = psf ;
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return 0 ;
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} /* pvf_close */
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static int
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pvf_write_header (SF_PRIVATE *psf, int calc_length)
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{ sf_count_t current ;
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if (psf->pipeoffset > 0)
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return 0 ;
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calc_length = calc_length ; /* Avoid a compiler warning. */
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current = psf_ftell (psf) ;
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/* Reset the current header length to zero. */
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psf->header [0] = 0 ;
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psf->headindex = 0 ;
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if (psf->is_pipe == SF_FALSE)
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psf_fseek (psf, 0, SEEK_SET) ;
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LSF_SNPRINTF ((char*) psf->header, sizeof (psf->header), "PVF1\n%d %d %d\n",
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psf->sf.channels, psf->sf.samplerate, psf->bytewidth * 8) ;
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psf->headindex = strlen ((char*) psf->header) ;
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/* Header construction complete so write it out. */
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psf_fwrite (psf->header, psf->headindex, 1, psf) ;
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if (psf->error)
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return psf->error ;
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psf->dataoffset = psf->headindex ;
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if (current > 0)
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psf_fseek (psf, current, SEEK_SET) ;
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return psf->error ;
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} /* pvf_write_header */
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static int
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pvf_read_header (SF_PRIVATE *psf)
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{ char buffer [32] ;
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int marker, channels, samplerate, bitwidth ;
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psf_binheader_readf (psf, "pmj", 0, &marker, 1) ;
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psf_log_printf (psf, "%M\n", marker) ;
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if (marker != PVF1_MARKER)
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return SFE_PVF_NO_PVF1 ;
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/* Grab characters up until a newline which is replaced by an EOS. */
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psf_binheader_readf (psf, "G", buffer, sizeof (buffer)) ;
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if (sscanf (buffer, "%d %d %d", &channels, &samplerate, &bitwidth) != 3)
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return SFE_PVF_BAD_HEADER ;
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psf_log_printf (psf, " Channels : %d\n Sample rate : %d\n Bit width : %d\n",
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channels, samplerate, bitwidth) ;
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psf->sf.channels = channels ;
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psf->sf.samplerate = samplerate ;
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switch (bitwidth)
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{ case 8 :
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psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_S8 ;
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psf->bytewidth = 1 ;
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break ;
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case 16 :
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psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_16 ;
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psf->bytewidth = 2 ;
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break ;
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case 32 :
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psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_32 ;
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psf->bytewidth = 4 ;
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break ;
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default :
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return SFE_PVF_BAD_BITWIDTH ;
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} ;
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psf->dataoffset = psf_ftell (psf) ;
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psf_log_printf (psf, " Data Offset : %D\n", psf->dataoffset) ;
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psf->endian = SF_ENDIAN_BIG ;
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psf->datalength = psf->filelength - psf->dataoffset ;
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psf->blockwidth = psf->sf.channels * psf->bytewidth ;
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if (! psf->sf.frames && psf->blockwidth)
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psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
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return 0 ;
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} /* pvf_read_header */
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/*
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** Do not edit or modify anything in this comment block.
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** The arch-tag line is a file identity tag for the GNU Arch
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** revision control system.
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**
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** arch-tag: 20a26761-8bc1-41d7-b1f3-9793bf3d9864
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*/
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