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_AUDIOSTREAM_H 28 #define _MULTIMEDIA_AUDIOSTREAM_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <Audio.h> 33 #include <AudioHdr.h> 34 #include <stdlib.h> 35 #include <AudioDebug.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 // This is the abstract base class for all audio data sources/sinks. 42 // It is invalid to create an object of type AudioStream. 43 44 class AudioStream : public Audio { 45 private: 46 AudioHdr hdr; // data encoding info 47 Double length; // length of data, in secs 48 49 protected: 50 51 Boolean hdrset() const; // TRUE if header valid 52 53 // Set header (always) 54 AudioError updateheader( 55 const AudioHdr& h); // header to copy 56 57 // Set data length 58 void setlength( 59 Double len); // new length, in secs 60 61 virtual Boolean opened() const = 0; // TRUE if stream 'open' 62 63 public: 64 AudioStream(const char *path = ""); // Constructor 65 66 // Set header 67 virtual AudioError SetHeader( 68 const AudioHdr& h); // header to copy 69 70 // Set data length 71 virtual void SetLength( 72 Double len); // new length, in secs 73 74 // XXX - is this needed? do we need time->sample frames? 75 virtual size_t GetByteCount() const; // Get length, in bytes 76 77 // class Audio methods specialized here 78 virtual AudioHdr GetHeader(); // Get header 79 80 virtual Double GetLength() const; // Get length, in secs 81 82 // Make sure endian of the data matches the current processor. 83 AudioError coerceEndian(unsigned char *buf, size_t len, 84 AudioEndian en); 85 86 virtual Boolean isEndianSensitive() const; 87 AudioEndian localByteOrder() const 88 { 89 return (hdr.localByteOrder()); 90 } 91 }; 92 93 #include <AudioStream_inline.h> 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* !_MULTIMEDIA_AUDIOSTREAM_H */ 100