1 files changed, 123 insertions, 0 deletions
diff --git a/examples/irixread.c b/examples/irixread.c
new file mode 100644
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+++ b/examples/irixread.c
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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., 59 Temple Place, Suite 330, Boston,
+	MA 02111-1307, USA.
+*/
+
+/*
+	irixread.c
+
+	This program reads and plays a given audio file using Irix's
+	default audio output device.  This file will not work on any
+	operating system other than Irix.
+
+	The only difference between this program and irixtest is that this
+	program does not load the entire audio track into memory at once.
+	Only a small number of frames are read into a buffer and then
+	written to the audio port.  While there are more frames to be
+	read, this process is repeated.
+*/
+
+#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 BUFFERED_FRAME_COUNT = 65536;
+
+void usage (void)
+{
+	fprintf(stderr, "usage: irixread filename\n");
+	exit(EXIT_FAILURE);
+}
+
+main (int argc, char **argv)
+{
+	AFfilehandle	file;
+	AFframecount	count, frameCount;
+	int		channelCount, sampleFormat, sampleWidth;
+	float		frameSize;
+	void		*buffer;
+	double		sampleRate;
+
+	ALport		outport;
+	ALconfig	outportconfig;
+
+	if (argc < 2)
+		usage();
+
+	file = afOpenFile(argv[1], "r", NULL);
+	if (file == AF_NULL_FILEHANDLE)
+	{
+		fprintf(stderr, "Could not open file %s.\n", argv[1]);
+		exit(EXIT_FAILURE);
+	}
+
+	frameCount = afGetFrameCount(file, AF_DEFAULT_TRACK);
+	frameSize = afGetVirtualFrameSize(file, AF_DEFAULT_TRACK, 1);
+	channelCount = afGetVirtualChannels(file, AF_DEFAULT_TRACK);
+	sampleRate = afGetRate(file, AF_DEFAULT_TRACK);
+	afGetVirtualSampleFormat(file, AF_DEFAULT_TRACK, &sampleFormat,
+		&sampleWidth);
+
+	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", (int) frameSize);
+	printf("channel count: %d\n", channelCount);
+	printf("sample rate: %.2f Hz\n", sampleRate);
+	buffer = malloc(BUFFERED_FRAME_COUNT * frameSize);
+
+	outportconfig = alNewConfig();
+	setwidth(outportconfig, sampleWidth);
+	setsampleformat(outportconfig, sampleFormat);
+	alSetChannels(outportconfig, channelCount);
+
+	count = afReadFrames(file, AF_DEFAULT_TRACK, buffer, BUFFERED_FRAME_COUNT);
+
+	outport = alOpenPort("irixread", "w", outportconfig);
+	setrate(outport, sampleRate);
+
+	do
+	{
+		printf("count = %lld\n", count);
+		alWriteFrames(outport, buffer, count);
+
+		count = afReadFrames(file, AF_DEFAULT_TRACK, buffer,
+			BUFFERED_FRAME_COUNT);
+	} while (count > 0);
+
+	waitport(outport);
+
+	alClosePort(outport);
+	alFreeConfig(outportconfig);
+
+	afCloseFile(file);
+}