alsa-utils/amixer/amixer.h

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C
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1998-08-13 17:43:39 +02:00
/*
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "atypes.h"
#define E_MIXER_SUCCESS 1
#define E_MIXER_NEED_CLOSE 2
#define E_MIXER_RECORD SND_MIXER_FLG_RECORD
#define E_MIXER_MUTE_LEFT SND_MIXER_FLG_MUTE_LEFT
#define E_MIXER_MUTE_RIGHT SND_MIXER_FLG_MUTE_RIGHT
#define E_MIXER_MUTE SND_MIXER_FLG_MUTE
class Mixer
{
public:
Mixer(int card = 0, int device = 0);
~Mixer();
bool Init();
bool Open(int card, int device);
void Close();
void DeviceSet(int32 device) {
current_device = device;
Update();
}
char* Name(int32 device);
char* Name();
int32 NumDevices() { return nr_devices; }
void Update();
void DeviceRead(int32 device, int32 *left, int32 *right, int32 *flag);
void DeviceWrite(int32 device, int32 left, int32 right, int32 flag);
void Read(int32 *left, int32 *right, int32 *flags) {
DeviceRead(current_device, left, right, flags);
}
void Read_dB(int32 *left_dB, int32 *right_dB) {
*left_dB = ch_data.left_dB;
*right_dB = ch_data.right_dB;
}
void Write(int32 left, int32 right, int32 flags) {
DeviceWrite(current_device, left, right, flags);
}
int Left() { return ch_data.left; }
int Right() { return ch_data.right; }
Mixer& operator[](int32 device) {
DeviceSet(device);
return (*this);
}
private:
snd_mixer_info_t info;
snd_mixer_channel_t ch_data;
snd_mixer_channel_info_t ch_info;
void * mixer_handle;
int32 mixer_status;
int32 current_device;
int32 nr_devices;
};