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) 1992-2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _MULTIMEDIA_AUDIOUNIXFILE_H 28 #define _MULTIMEDIA_AUDIOUNIXFILE_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <AudioStream.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 // This is the abstract base class for all file descriptor based audio i/o. 39 // It is invalid to create an object of type AudioUnixfile. 40 41 class AudioUnixfile : public AudioStream { 42 private: 43 FileAccess mode; // access mode 44 Boolean block; // FALSE if fd set non-blocking 45 Boolean filehdrset; // TRUE if file hdr read/written 46 int fd; // file descriptor 47 char *infostring; // Info string from header 48 unsigned int infolength; // Info string length 49 50 AudioUnixfile() {} // Constructor w/no args 51 52 protected: 53 // Constructor 54 AudioUnixfile( 55 const char *path, // pathname 56 const FileAccess acc); // access mode 57 58 int getfd() const; // Return descriptor 59 void setfd(int d); // Set descriptor 60 61 virtual AudioError decode_filehdr(); // Get header from file 62 virtual AudioError encode_filehdr(); // Write file header 63 64 // Seek in input stream 65 virtual AudioError seekread( 66 Double pos, // position to seek to 67 off_t& offset); // returned byte offset 68 69 // Seek in output stream 70 virtual AudioError seekwrite( 71 Double pos, // position to seek to 72 off_t& offset); // returned byte offset 73 74 virtual Boolean isfdset() const; // TRUE if fd is valid 75 virtual Boolean isfilehdrset() const; // TRUE if file hdr r/w 76 77 // class AudioStream methods specialized here 78 virtual Boolean opened() const; // TRUE, if open 79 80 public: 81 virtual ~AudioUnixfile(); // Destructor 82 83 virtual FileAccess GetAccess() const; // Get mode 84 virtual Boolean GetBlocking() const; // TRUE, if blocking i/o 85 virtual void SetBlocking(Boolean b); // Set block/non-block 86 87 virtual AudioError Create() = 0; // Create file 88 virtual AudioError Open() = 0; // Open file 89 90 // ... with search path 91 virtual AudioError OpenPath( 92 const char *path = 0); 93 virtual AudioError Close(); // Close file 94 95 // Methods specific to the audio file format 96 // Get info string 97 virtual char *const GetInfostring( 98 int& len) const; // return length 99 100 // Set info string 101 virtual void SetInfostring( 102 const char *str, // ptr to info data 103 int len = -1); // optional length 104 105 // class Audio methods specialized here 106 // Read from position 107 virtual AudioError ReadData( 108 void* buf, // buffer to fill 109 size_t& len, // buffer length (updated) 110 Double& pos); // start position (updated) 111 112 // Write at position 113 virtual AudioError WriteData( 114 void* buf, // buffer to copy 115 size_t& len, // buffer length (updated) 116 Double& pos); // start position (updated) 117 }; 118 119 #include <AudioUnixfile_inline.h> 120 121 #ifdef __cplusplus 122 } 123 #endif 124 125 #endif /* !_MULTIMEDIA_AUDIOUNIXFILE_H */ 126