150 lines
4.1 KiB
C
150 lines
4.1 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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irixtestloop.c
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This file reads the loop points from a file (presumably AIFF) and
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loops that part of the file several times. Audio output is routed
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to IRIX's default audio output device. This program will not
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compile on any platform other than IRIX.
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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 REPEAT_COUNT = 3;
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void usage (void)
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{
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printf("usage: irixtestloop file\n");
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printf("where file is of a format which contains a loop (e.g. AIFF)\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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void *buffer;
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AFframecount frameCount;
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int sampleFormat, sampleWidth, channelCount;
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float frameSize;
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double sampleRate;
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int *loopids, *markids;
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int i, loopCount, markCount;
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int startmarkid, endmarkid;
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AFframecount startloop, endloop;
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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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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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afGetVirtualSampleFormat(file, AF_DEFAULT_TRACK, &sampleFormat, &sampleWidth);
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sampleRate = afGetRate(file, AF_DEFAULT_TRACK);
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/*
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If the file's sample format is unsigned integer data,
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change the virtual sample format to two's complement
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since the SGI Audio Library won't accept unsigned
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data.
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*/
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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", 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(frameCount * frameSize);
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afReadFrames(file, AF_DEFAULT_TRACK, buffer, frameCount);
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loopCount = afGetLoopIDs(file, AF_DEFAULT_INST, NULL);
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loopids = malloc(sizeof (int) * loopCount);
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afGetLoopIDs(file, AF_DEFAULT_INST, loopids);
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markCount = afGetMarkIDs(file, AF_DEFAULT_TRACK, NULL);
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markids = malloc(sizeof (int) * markCount);
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afGetMarkIDs(file, AF_DEFAULT_TRACK, markids);
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printf("loop ids:");
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for (i=0; i<loopCount; i++)
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printf(" %d", loopids[i]);
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printf("\n");
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printf("mark ids:");
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for (i=0; i<markCount; i++)
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printf(" %d", markids[i]);
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printf("\n");
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startmarkid = afGetLoopStart(file, AF_DEFAULT_INST, 1);
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endmarkid = afGetLoopEnd(file, AF_DEFAULT_INST, 1);
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startloop = afGetMarkPosition(file, AF_DEFAULT_TRACK, startmarkid);
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endloop = afGetMarkPosition(file, AF_DEFAULT_TRACK, endmarkid);
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afCloseFile(file);
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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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outport = alOpenPort("irixtestloop", "w", outportconfig);
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setrate(outport, sampleRate);
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alWriteFrames(outport, buffer, startloop);
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for (i=0; i<REPEAT_COUNT; i++)
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{
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printf("iteration %d: start %lld, end %lld, length %lld\n",
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i, endloop, startloop, endloop - startloop);
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alWriteFrames(outport,
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(char *) buffer + (int) (startloop * frameSize),
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endloop - startloop);
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}
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waitport(outport);
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alClosePort(outport);
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alFreeConfig(outportconfig);
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free(buffer);
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}
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