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/*
Audio File Library
Copyright (C) 1998-1999, Michael Pruett <michael@68k.org>
Copyright (C) 2001, Silicon Graphics, Inc.
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
irixtestloop.c
This file reads the loop points from a file (presumably AIFF) and
loops that part of the file several times. Audio output is routed
to IRIX's default audio output device. This program will not
compile on any platform other than IRIX.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dmedia/audio.h>
#include <dmedia/audiofile.h>
#include "sgi.h"
const int REPEAT_COUNT = 3;
void usage (void)
{
printf("usage: irixtestloop file\n");
printf("where file is of a format which contains a loop (e.g. AIFF)\n");
exit(EXIT_FAILURE);
}
main (int argc, char **argv)
{
AFfilehandle file;
void *buffer;
AFframecount frameCount;
int sampleFormat, sampleWidth, channelCount;
float frameSize;
double sampleRate;
int *loopids, *markids;
int i, loopCount, markCount;
int startmarkid, endmarkid;
AFframecount startloop, endloop;
ALport outport;
ALconfig outportconfig;
if (argc < 2)
usage();
file = afOpenFile(argv[1], "r", NULL);
frameCount = afGetFrameCount(file, AF_DEFAULT_TRACK);
frameSize = afGetVirtualFrameSize(file, AF_DEFAULT_TRACK, 1);
channelCount = afGetVirtualChannels(file, AF_DEFAULT_TRACK);
afGetVirtualSampleFormat(file, AF_DEFAULT_TRACK, &sampleFormat, &sampleWidth);
sampleRate = afGetRate(file, AF_DEFAULT_TRACK);
/*
If the file's sample format is unsigned integer data,
change the virtual sample format to two's complement
since the SGI Audio Library won't accept unsigned
data.
*/
if (sampleFormat == AF_SAMPFMT_UNSIGNED)
{
afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK,
AF_SAMPFMT_TWOSCOMP, sampleWidth);
}
printf("frame count: %lld\n", frameCount);
printf("frame size: %d bytes\n", frameSize);
printf("channel count: %d\n", channelCount);
printf("sample rate: %.2f Hz\n", sampleRate);
buffer = malloc(frameCount * frameSize);
afReadFrames(file, AF_DEFAULT_TRACK, buffer, frameCount);
loopCount = afGetLoopIDs(file, AF_DEFAULT_INST, NULL);
loopids = malloc(sizeof (int) * loopCount);
afGetLoopIDs(file, AF_DEFAULT_INST, loopids);
markCount = afGetMarkIDs(file, AF_DEFAULT_TRACK, NULL);
markids = malloc(sizeof (int) * markCount);
afGetMarkIDs(file, AF_DEFAULT_TRACK, markids);
printf("loop ids:");
for (i=0; i<loopCount; i++)
printf(" %d", loopids[i]);
printf("\n");
printf("mark ids:");
for (i=0; i<markCount; i++)
printf(" %d", markids[i]);
printf("\n");
startmarkid = afGetLoopStart(file, AF_DEFAULT_INST, 1);
endmarkid = afGetLoopEnd(file, AF_DEFAULT_INST, 1);
startloop = afGetMarkPosition(file, AF_DEFAULT_TRACK, startmarkid);
endloop = afGetMarkPosition(file, AF_DEFAULT_TRACK, endmarkid);
afCloseFile(file);
outportconfig = alNewConfig();
setwidth(outportconfig, sampleWidth);
setsampleformat(outportconfig, sampleFormat);
alSetChannels(outportconfig, channelCount);
outport = alOpenPort("irixtestloop", "w", outportconfig);
setrate(outport, sampleRate);
alWriteFrames(outport, buffer, startloop);
for (i=0; i<REPEAT_COUNT; i++)
{
printf("iteration %d: start %lld, end %lld, length %lld\n",
i, endloop, startloop, endloop - startloop);
alWriteFrames(outport,
(char *) buffer + (int) (startloop * frameSize),
endloop - startloop);
}
waitport(outport);
alClosePort(outport);
alFreeConfig(outportconfig);
free(buffer);
}
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