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/*
Audio File Library
Copyright (C) 1998-2000, Michael Pruett <michael@68k.org>
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.
*/
/*
nextwrite.c
This file contains routines for writing NeXT/Sun format sound files.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#include "audiofile.h"
#include "afinternal.h"
#include "next.h"
#include "byteorder.h"
#include "util.h"
#include "setup.h"
status _af_next_update (AFfilehandle file);
static u_int32_t nextencodingtype (_AudioFormat *format);
static status next_write_header (AFfilehandle file);
/* A return value of zero indicates successful synchronisation. */
status _af_next_update (AFfilehandle file)
{
next_write_header(file);
return AF_SUCCEED;
}
static status next_write_header (AFfilehandle file)
{
_Track *track;
int frameSize;
u_int32_t offset, length, encoding, sampleRate, channelCount;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
frameSize = _af_format_frame_size(&track->f, AF_FALSE);
offset = HOST_TO_BENDIAN_INT32(track->fpos_first_frame);
length = HOST_TO_BENDIAN_INT32(track->totalfframes * frameSize);
encoding = HOST_TO_BENDIAN_INT32(nextencodingtype(&track->f));
sampleRate = HOST_TO_BENDIAN_INT32(track->f.sampleRate);
channelCount = HOST_TO_BENDIAN_INT32(track->f.channelCount);
if (af_fseek(file->fh, 0, SEEK_SET) != 0)
_af_error(AF_BAD_LSEEK, "bad seek");
af_fwrite(".snd", 4, 1, file->fh);
af_fwrite(&offset, 4, 1, file->fh);
af_fwrite(&length, 4, 1, file->fh);
af_fwrite(&encoding, 4, 1, file->fh);
af_fwrite(&sampleRate, 4, 1, file->fh);
af_fwrite(&channelCount, 4, 1, file->fh);
return AF_SUCCEED;
}
static u_int32_t nextencodingtype (_AudioFormat *format)
{
u_int32_t encoding = 0;
if (format->compressionType != AF_COMPRESSION_NONE)
{
if (format->compressionType == AF_COMPRESSION_G711_ULAW)
encoding = _AU_FORMAT_MULAW_8;
else if (format->compressionType == AF_COMPRESSION_G711_ALAW)
encoding = _AU_FORMAT_ALAW_8;
}
else if (format->sampleFormat == AF_SAMPFMT_TWOSCOMP)
{
if (format->sampleWidth == 8)
encoding = _AU_FORMAT_LINEAR_8;
else if (format->sampleWidth == 16)
encoding = _AU_FORMAT_LINEAR_16;
else if (format->sampleWidth == 24)
encoding = _AU_FORMAT_LINEAR_24;
else if (format->sampleWidth == 32)
encoding = _AU_FORMAT_LINEAR_32;
}
else if (format->sampleFormat == AF_SAMPFMT_FLOAT)
encoding = _AU_FORMAT_FLOAT;
else if (format->sampleFormat == AF_SAMPFMT_DOUBLE)
encoding = _AU_FORMAT_DOUBLE;
return encoding;
}
status _af_next_write_init (AFfilesetup setup, AFfilehandle filehandle)
{
_Track *track;
if (_af_filesetup_make_handle(setup, filehandle) == AF_FAIL)
return AF_FAIL;
filehandle->formatSpecific = NULL;
if (filehandle->miscellaneousCount > 0)
{
_af_error(AF_BAD_NUMMISC, "NeXT format supports no miscellaneous chunks");
return AF_FAIL;
}
next_write_header(filehandle);
track = _af_filehandle_get_track(filehandle, AF_DEFAULT_TRACK);
track->fpos_first_frame = 28;
track->f.byteOrder = AF_BYTEORDER_BIGENDIAN;
return AF_SUCCEED;
}
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