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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_AUDIOBUFFER_H
#define _MULTIMEDIA_AUDIOBUFFER_H
#include <AudioStream.h>
#ifdef __cplusplus
extern "C" {
#endif
// This is the class describing a mapped buffer of audio data.
// In addition to the standard Read and Write methods, the address
// of the buffer may be obtained and the data accessed directly.
class AudioBuffer : public AudioStream {
private:
Double buflen; // buffer size, in seconds
int zflag; // malloc'd with zmalloc?
protected:
size_t bufsize; // buffer size, in bytes
void* bufaddr; // buffer address
// class AudioStream methods specialized here
virtual Boolean opened() const; // TRUE, if open
virtual AudioError alloc(); // Allocate buffer
public:
// Constructor
AudioBuffer(
double len = 0., // buffer size, in seconds
const char *name = "(buffer)"); // name
~AudioBuffer(); // Destructor
virtual void* GetAddress() const; // Get buffer address
virtual void* GetAddress(Double) const; // Get address at offset
virtual AudioError SetSize(Double len); // Change buffer size
virtual Double GetSize() const; // Get buffer size
virtual size_t GetByteCount() const; // Get size, in bytes
// class AudioStream methods specialized here
// Set header
virtual AudioError SetHeader(
const AudioHdr& h); // header to copy
// Set data length
virtual void SetLength(
Double len); // new length, in secs
// 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)
// Append at position
virtual AudioError AppendData(
void* buf, // buffer to copy
size_t& len, // buffer length (updated)
Double& pos); // start position (updated)
// copy to another audio obj.
virtual AudioError AsyncCopy(
Audio* to, // dest audio object
Double& frompos,
Double& topos,
Double& limit);
virtual Boolean isBuffer() const { return (TRUE); }
};
#ifdef __cplusplus
}
#endif
#endif /* !_MULTIMEDIA_AUDIOBUFFER_H */
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