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/*************************************************************************
RecordThread.h - thread for lowlevel audio recording
-------------------
begin : Mon Oct 20 2003
copyright : (C) 2003 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef RECORD_THREAD_H
#define RECORD_THREAD_H
#include "config.h"
#include <QByteArray>
#include <QQueue>
#include <QRecursiveMutex>
#include "libkwave/WorkerThread.h"
namespace Kwave
{
class RecordDevice;
class RecordThread: public Kwave::WorkerThread
{
Q_OBJECT
public:
/** Constructor */
RecordThread();
/** Destructor */
~RecordThread() override;
/** does the recording */
void run() override;
/**
* Select a new record device.
* @param device a RecordDevice that is opened and set up for reading
* @note this must not be called during recording
*/
void setRecordDevice(Kwave::RecordDevice *device);
/**
* Set the number of buffers and their size
* @param count the number of buffer, minimum allowed is two
* @param size the number of bytes for each buffer
* @return number of allocated buffers or -ENOMEM if less than two
* @note this must not be called during recording
*/
int setBuffers(unsigned int count, unsigned int size);
/** Returns the amount of remaining empty buffers */
unsigned int remainingBuffers();
/** Returns the number of queued filled buffers */
unsigned int queuedBuffers();
/** De-queues a buffer from the m_full_queue. */
QByteArray dequeue();
signals:
/**
* emitted when a buffer was full and has been de-queued
* with dequeue()
*/
void bufferFull();
/**
* emitted when the recording stops or aborts
* @param errorcode zero if stopped normally or a negative
* error code if aborted
*/
void stopped(int errorcode);
private:
/** lock for protecting the queues */
QRecursiveMutex m_lock;
/** the device used as source */
Kwave::RecordDevice *m_device;
/** queue with empty buffers for raw input data */
QQueue<QByteArray>m_empty_queue;
/** queue with filled buffers with raw input data */
QQueue<QByteArray>m_full_queue;
/** number of buffers to allocate */
unsigned int m_buffer_count;
/** size of m_buffer in bytes */
unsigned int m_buffer_size;
};
}
#endif /* RECORD_THREAD_H */
//***************************************************************************
//***************************************************************************
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