123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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Audio File Library
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Copyright (C) 1998-1999, Michael Pruett <michael@68k.org>
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Copyright (C) 2001, Silicon Graphics, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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irixread.c
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This program reads and plays a given audio file using Irix's
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default audio output device. This file will not work on any
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operating system other than Irix.
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The only difference between this program and irixtest is that this
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program does not load the entire audio track into memory at once.
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Only a small number of frames are read into a buffer and then
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written to the audio port. While there are more frames to be
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read, this process is repeated.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <dmedia/audio.h>
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#include <dmedia/audiofile.h>
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#include "sgi.h"
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const int BUFFERED_FRAME_COUNT = 65536;
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void usage (void)
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{
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fprintf(stderr, "usage: irixread filename\n");
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exit(EXIT_FAILURE);
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}
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main (int argc, char **argv)
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{
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AFfilehandle file;
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AFframecount count, frameCount;
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int channelCount, sampleFormat, sampleWidth;
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float frameSize;
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void *buffer;
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double sampleRate;
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ALport outport;
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ALconfig outportconfig;
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if (argc < 2)
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usage();
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file = afOpenFile(argv[1], "r", NULL);
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if (file == AF_NULL_FILEHANDLE)
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{
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fprintf(stderr, "Could not open file %s.\n", argv[1]);
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exit(EXIT_FAILURE);
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}
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frameCount = afGetFrameCount(file, AF_DEFAULT_TRACK);
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frameSize = afGetVirtualFrameSize(file, AF_DEFAULT_TRACK, 1);
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channelCount = afGetVirtualChannels(file, AF_DEFAULT_TRACK);
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sampleRate = afGetRate(file, AF_DEFAULT_TRACK);
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afGetVirtualSampleFormat(file, AF_DEFAULT_TRACK, &sampleFormat,
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&sampleWidth);
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if (sampleFormat == AF_SAMPFMT_UNSIGNED)
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{
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afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK,
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AF_SAMPFMT_TWOSCOMP, sampleWidth);
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}
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printf("frame count: %lld\n", frameCount);
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printf("frame size: %d bytes\n", (int) frameSize);
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printf("channel count: %d\n", channelCount);
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printf("sample rate: %.2f Hz\n", sampleRate);
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buffer = malloc(BUFFERED_FRAME_COUNT * frameSize);
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outportconfig = alNewConfig();
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setwidth(outportconfig, sampleWidth);
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setsampleformat(outportconfig, sampleFormat);
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alSetChannels(outportconfig, channelCount);
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count = afReadFrames(file, AF_DEFAULT_TRACK, buffer, BUFFERED_FRAME_COUNT);
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outport = alOpenPort("irixread", "w", outportconfig);
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setrate(outport, sampleRate);
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do
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{
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printf("count = %lld\n", count);
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alWriteFrames(outport, buffer, count);
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count = afReadFrames(file, AF_DEFAULT_TRACK, buffer,
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BUFFERED_FRAME_COUNT);
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} while (count > 0);
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waitport(outport);
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alClosePort(outport);
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alFreeConfig(outportconfig);
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afCloseFile(file);
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}
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