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/*
* 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
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1992-2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _MULTIMEDIA_AUDIOUNIXFILE_H
#define _MULTIMEDIA_AUDIOUNIXFILE_H
#include <AudioStream.h>
#ifdef __cplusplus
extern "C" {
#endif
// This is the abstract base class for all file descriptor based audio i/o.
// It is invalid to create an object of type AudioUnixfile.
class AudioUnixfile : public AudioStream {
private:
FileAccess mode; // access mode
Boolean block; // FALSE if fd set non-blocking
Boolean filehdrset; // TRUE if file hdr read/written
int fd; // file descriptor
char *infostring; // Info string from header
unsigned int infolength; // Info string length
AudioUnixfile() {} // Constructor w/no args
protected:
// Constructor
AudioUnixfile(
const char *path, // pathname
const FileAccess acc); // access mode
int getfd() const; // Return descriptor
void setfd(int d); // Set descriptor
virtual AudioError decode_filehdr(); // Get header from file
virtual AudioError encode_filehdr(); // Write file header
// Seek in input stream
virtual AudioError seekread(
Double pos, // position to seek to
off_t& offset); // returned byte offset
// Seek in output stream
virtual AudioError seekwrite(
Double pos, // position to seek to
off_t& offset); // returned byte offset
virtual Boolean isfdset() const; // TRUE if fd is valid
virtual Boolean isfilehdrset() const; // TRUE if file hdr r/w
// class AudioStream methods specialized here
virtual Boolean opened() const; // TRUE, if open
public:
virtual ~AudioUnixfile(); // Destructor
virtual FileAccess GetAccess() const; // Get mode
virtual Boolean GetBlocking() const; // TRUE, if blocking i/o
virtual void SetBlocking(Boolean b); // Set block/non-block
virtual AudioError Create() = 0; // Create file
virtual AudioError Open() = 0; // Open file
// ... with search path
virtual AudioError OpenPath(
const char *path = 0);
virtual AudioError Close(); // Close file
// Methods specific to the audio file format
// Get info string
virtual char *GetInfostring(
int& len) const; // return length
// Set info string
virtual void SetInfostring(
const char *str, // ptr to info data
int len = -1); // optional length
// class Audio methods specialized here
// Read from position
virtual AudioError ReadData(
void* buf, // buffer to fill
size_t& len, // buffer length (updated)
Double& pos); // start position (updated)
// Write at position
virtual AudioError WriteData(
void* buf, // buffer to copy
size_t& len, // buffer length (updated)
Double& pos); // start position (updated)
};
#include <AudioUnixfile_inline.h>
#ifdef __cplusplus
}
#endif
#endif /* !_MULTIMEDIA_AUDIOUNIXFILE_H */
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