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_AUDIOBUFFER_H 28 #define _MULTIMEDIA_AUDIOBUFFER_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 class describing a mapped buffer of audio data. 39 // In addition to the standard Read and Write methods, the address 40 // of the buffer may be obtained and the data accessed directly. 41 42 class AudioBuffer : public AudioStream { 43 private: 44 Double buflen; // buffer size, in seconds 45 int zflag; // malloc'd with zmalloc? 46 protected: 47 size_t bufsize; // buffer size, in bytes 48 void* bufaddr; // buffer address 49 50 // class AudioStream methods specialized here 51 virtual Boolean opened() const; // TRUE, if open 52 virtual AudioError alloc(); // Allocate buffer 53 54 public: 55 // Constructor 56 AudioBuffer( 57 double len = 0., // buffer size, in seconds 58 const char *name = "(buffer)"); // name 59 ~AudioBuffer(); // Destructor 60 61 virtual void* GetAddress() const; // Get buffer address 62 virtual void* GetAddress(Double) const; // Get address at offset 63 virtual AudioError SetSize(Double len); // Change buffer size 64 virtual Double GetSize() const; // Get buffer size 65 virtual size_t GetByteCount() const; // Get size, in bytes 66 67 // class AudioStream methods specialized here 68 // Set header 69 virtual AudioError SetHeader( 70 const AudioHdr& h); // header to copy 71 72 // Set data length 73 virtual void SetLength( 74 Double len); // new length, in secs 75 76 // class Audio methods specialized here 77 78 // Read from position 79 virtual AudioError ReadData( 80 void* buf, // buffer to fill 81 size_t& len, // buffer length (updated) 82 Double& pos); // start position (updated) 83 84 // Write at position 85 virtual AudioError WriteData( 86 void* buf, // buffer to copy 87 size_t& len, // buffer length (updated) 88 Double& pos); // start position (updated) 89 90 // Append at position 91 virtual AudioError AppendData( 92 void* buf, // buffer to copy 93 size_t& len, // buffer length (updated) 94 Double& pos); // start position (updated) 95 96 // copy to another audio obj. 97 virtual AudioError AsyncCopy( 98 Audio* to, // dest audio object 99 Double& frompos, 100 Double& topos, 101 Double& limit); 102 isBuffer()103 virtual Boolean isBuffer() const { return (TRUE); } 104 }; 105 106 #ifdef __cplusplus 107 } 108 #endif 109 110 #endif /* !_MULTIMEDIA_AUDIOBUFFER_H */ 111