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/*
Audio File Library
Copyright (C) 2001, Silicon Graphics, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*/
/*
ircamwrite.c
This file contains routines for writing to Berkeley/IRCAM/CARL
format files.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#include "afinternal.h"
#include "audiofile.h"
#include "util.h"
#include "byteorder.h"
#include "setup.h"
#include "track.h"
#include "marker.h"
#include "ircam.h"
/*
These magic numbers are fucking stupid.
Here ircam_mips_magic refers to little-endian MIPS, not SGI IRIX,
which uses big-endian MIPS.
*/
extern const u_int8_t _af_ircam_vax_magic[4], _af_ircam_sun_magic[4],
_af_ircam_mips_magic[4], _af_ircam_next_magic[4];
/* We write IRCAM files using the native byte order. */
status _af_ircam_write_init (AFfilesetup setup, AFfilehandle handle)
{
_Track *track;
const u_int8_t *magic;
float rate;
u_int32_t channels;
u_int32_t packMode;
u_int32_t dataOffset;
u_int8_t zeros[SIZEOF_BSD_HEADER];
float maxAmp = 1.0;
bool isSwapped, isLittleEndian;
assert(handle->fileFormat == AF_FILE_IRCAM);
if (_af_filesetup_make_handle(setup, handle) == AF_FAIL)
return AF_FAIL;
dataOffset = SIZEOF_BSD_HEADER;
track = &handle->tracks[0];
track->totalfframes = 0;
track->fpos_first_frame = dataOffset;
track->nextfframe = 0;
track->fpos_next_frame = track->fpos_first_frame;
handle->formatSpecific = NULL;
/* Choose the magic number appropriate for the byte order. */
#ifdef WORDS_BIGENDIAN
magic = _af_ircam_sun_magic;
#else
magic = _af_ircam_vax_magic;
#endif
channels = track->f.channelCount;
rate = track->f.sampleRate;
assert(track->f.compressionType == AF_COMPRESSION_NONE);
if (track->f.sampleFormat == AF_SAMPFMT_TWOSCOMP)
{
assert(track->f.sampleWidth == 16);
packMode = SF_SHORT;
}
else if (track->f.sampleFormat == AF_SAMPFMT_FLOAT)
{
assert(track->f.sampleWidth == 32);
packMode = SF_FLOAT;
}
af_fseek(handle->fh, 0, SEEK_SET);
af_fwrite(magic, 4, 1, handle->fh);
af_fwrite(&rate, 4, 1, handle->fh);
af_fwrite(&channels, 4, 1, handle->fh);
af_fwrite(&packMode, 4, 1, handle->fh);
/* Zero the entire description block. */
memset(zeros, 0, SIZEOF_BSD_HEADER);
af_fwrite(zeros, SIZEOF_BSD_HEADER - 4*4, 1, handle->fh);
return AF_SUCCEED;
}
status _af_ircam_update (AFfilehandle file)
{
return AF_SUCCEED;
}
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