audio/utilities/AudioLib.cc

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
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/*
 * Copyright (c) 1990-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <Audio.h>
#include <AudioFile.h>
#include <AudioList.h>
#include <AudioLib.h>

// Generic Audio functions


// Open an audio file readonly, and return an AudioList referencing it.
AudioError
Audio_OpenInputFile(
    const char  *path,      // input filename
    Audio*&     ap)     // returned AudioList pointer
{
    AudioFile*  inf;
    AudioList*  lp;
    AudioError  err;

    // Open file and decode the header
    inf = new AudioFile(path, (FileAccess)ReadOnly);
    if (inf == 0)
        return (AUDIO_UNIXERROR);
    err = inf->Open();
    if (err) {
        delete inf;
        return (err);
    }

    // Create a list object and set it up to reference the file
    lp = new AudioList;
    if (lp == 0) {
        delete inf;
        return (AUDIO_UNIXERROR);
    }
    lp->Insert(inf);
    ap = lp;
    return (AUDIO_SUCCESS);
}


// Create an output file and copy an input stream to it.
// If an error occurs during output, leave a partially written file.
AudioError
Audio_WriteOutputFile(
    const char  *path,      // output filename
    const AudioHdr& hdr,        // output data header
    Audio*      input)      // input data stream
{
    AudioFile*  outf;
    AudioError  err;

    // Create output file object
    outf = new AudioFile(path, (FileAccess)WriteOnly);
    if (outf == 0)
        return (AUDIO_UNIXERROR);

    // Set audio file header and create file
    if ((err = outf->SetHeader(hdr)) || (err = outf->Create())) {
        delete outf;
        return (err);
    }

    // Copy data to file
    err = AudioCopy(input, outf);

    // Close output file and clean up.  If error, leave partial file.
    delete outf;
    return (err);
}