MythTV: audioinput.h Source File

00001 /*
00002  * Copyright (C) 2007  Anand K. Mistry
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License
00006  * as published by the Free Software Foundation; either version 2
00007  * of the License, or (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  */
00019 /* vim: set expandtab tabstop=4 shiftwidth=4: */
00020 
00021 #ifndef _AUDIOINPUT_H_
00022 #define _AUDIOINPUT_H_
00023 
00024 #include <QString>
00025 #include <unistd.h>
00026 
00027 class AudioInput
00028 {
00029   public:
00030     virtual ~AudioInput() {}
00031 
00032     virtual bool Open(uint sample_bits, uint sample_rate, uint channels) = 0;
00033     virtual bool IsOpen(void) = 0;
00034     virtual void Close(void) = 0;
00035 
00036     virtual bool Start(void) = 0;
00037     virtual bool Stop(void) = 0;
00038 
00039     virtual int GetBlockSize(void) = 0;
00040     virtual int GetSamples(void *buf, uint nbytes) = 0;
00041     virtual int GetNumReadyBytes(void) = 0;
00042 
00043     // Factory function
00044     static AudioInput *CreateDevice(const QByteArray &device);
00045 
00046   protected:
00047     AudioInput(const QString &device);
00048 
00049     QByteArray m_audio_device;
00050     int        m_audio_channels;
00051     int        m_audio_sample_bits;
00052     int        m_audio_sample_rate;
00053 };
00054 #endif /* _AUDIOINPUT_H_ */