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Cream of the Crop 26
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timidsrc.zip
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raw_a.c
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1997-01-16
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/*
TiMidity -- Experimental MIDI to WAVE converter
Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
raw_audio.c
Functions to output raw sound data to a file or stdout.
*/
#ifdef __EMX__
#include <stdlib.h>
#endif
#ifdef __WIN32__
#include <stdlib.h>
#include <io.h>
#include <string.h>
#else
#include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>
#ifdef __FreeBSD__
#include <stdio.h>
#endif
#include "config.h"
#include "output.h"
#include "controls.h"
#ifdef __WIN32__
#define OPEN_MODE O_WRONLY | O_CREAT | O_TRUNC | O_BINARY
#else
#define OPEN_MODE O_WRONLY | O_CREAT | O_TRUNC
#endif
static int open_output(void); /* 0=success, 1=warning, -1=fatal error */
static void close_output(void);
static void output_data(int32 *buf, int32 count);
static void flush_output(void);
static void purge_output(void);
/* export the playback mode */
#define dpm raw_play_mode
PlayMode dpm = {
DEFAULT_RATE, PE_16BIT|PE_SIGNED,
-1,
{0,0,0,0,0},
"raw waveform data", 'r',
"output.raw",
open_output,
close_output,
output_data,
flush_output,
purge_output
};
/*************************************************************************/
static int open_output(void)
{
if (dpm.encoding & PE_ULAW)
dpm.encoding &= ~PE_16BIT;
if (!(dpm.encoding & PE_16BIT))
dpm.encoding &= ~PE_BYTESWAP;
if (dpm.name && dpm.name[0]=='-' && dpm.name[1]=='\0')
dpm.fd=1; /* data to stdout */
else
{
/* Open the audio file */
dpm.fd=open(dpm.name, OPEN_MODE, 0644);
if (dpm.fd<0)
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: %s",
dpm.name, sys_errlist[errno]);
return -1;
}
}
return 0;
}
static void output_data(int32 *buf, int32 count)
{
if (!(dpm.encoding & PE_MONO)) count*=2; /* Stereo samples */
if (dpm.encoding & PE_16BIT)
{
if (dpm.encoding & PE_BYTESWAP)
{
if (dpm.encoding & PE_SIGNED)
s32tos16x(buf, count);
else
s32tou16x(buf, count);
}
else
{
if (dpm.encoding & PE_SIGNED)
s32tos16(buf, count);
else
s32tou16(buf, count);
}
while ((-1==write(dpm.fd, buf, count * 2)) && errno==EINTR)
;
}
else
{
if (dpm.encoding & PE_ULAW)
{
s32toulaw(buf, count);
}
else
{
if (dpm.encoding & PE_SIGNED)
s32tos8(buf, count);
else
s32tou8(buf, count);
}
while ((-1==write(dpm.fd, buf, count)) && errno==EINTR)
;
}
}
static void close_output(void)
{
if (dpm.fd != 1) /* We don't close stdout */
close(dpm.fd);
}
static void flush_output(void) { }
static void purge_output(void) { }