usr/src/cmd/audio/include/AudioExtent.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1990-2001 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ifndef _MULTIMEDIA_AUDIOEXTENT_H
  28 #define _MULTIMEDIA_AUDIOEXTENT_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <values.h>
  33 #include <Audio.h>
  34
  35 #ifdef __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 // This class defines an extent of a referenced audio class
  40 class AudioExtent : public Audio {
  41 private:
  42         Audio*                  ref;            // reference to audio object
  43         Double                  start;          // start time
  44         Double                  end;            // end time
  45
  46         AudioExtent operator=(AudioExtent);     // Assignment is illegal
  47
  48 public:
  49         // Constructor
  50         AudioExtent(
  51             Audio* obj,                         // audio object
  52             double s = 0.,                      // start time
  53             double e = AUDIO_UNKNOWN_TIME);     // end time
  54         virtual ~AudioExtent();                         // Destructor
  55
  56         Audio* GetRef() const;                          // Get audio obj
  57         void SetRef(Audio* r);                          // Set audio obj
  58         Double GetStart() const;                        // Get start time
  59         void SetStart(Double s);                        // Set start time
  60         Double GetEnd() const;                          // Get end time
  61         void SetEnd(Double e);                          // Set end time
  62
  63         // class Audio methods specialized here
  64         virtual Double GetLength() const;               // Get length, in secs
  65         virtual char *GetName() const;                  // Get name string
  66         virtual AudioHdr GetHeader();                   // Get header
  67         virtual AudioHdr GetHeader(Double pos);         // Get header at pos
  68
  69         // Read from position
  70         virtual AudioError ReadData(
  71             void* buf,                          // buffer to fill
  72             size_t& len,                        // buffer length (updated)
  73             Double& pos);                       // start position (updated)
  74
  75         // Write is prohibited
  76         virtual AudioError WriteData(
  77             void* buf,                          // buffer to copy
  78             size_t& len,                        // buffer length (updated)
  79             Double& pos);                       // start position (updated)
  80
  81         virtual Boolean isExtent() const { return (TRUE); }
  82 };
  83
  84 #ifdef __cplusplus
  85 }
  86 #endif
  87
  88 #endif /* !_MULTIMEDIA_AUDIOEXTENT_H */