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/***************************************************************************
* Copyright (C) 2006-2021 by Ilya Kotov *
* forkotov02@ya.ru *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef OUTPUTALSA_H
#define OUTPUTALSA_H
class OutputALSA;
extern "C"
{
#include <alsa/asoundlib.h>
}
#include <QHash>
#include <qmmp/output.h>
#include <qmmp/volume.h>
class OutputALSA : public Output
{
public:
OutputALSA();
~OutputALSA();
bool initialize(quint32, ChannelMap map, Qmmp::AudioFormat format) override;
//output api
qint64 latency() override;
qint64 writeAudio(unsigned char *data, qint64 maxSize) override;
void drain() override;
void reset() override;
void suspend() override;
void resume() override;
private:
// helper functions
long alsa_write(unsigned char *data, long size);
void uninitialize();
bool m_inited = false;
bool m_use_mmap;
//alsa
snd_pcm_t *pcm_handle = nullptr;
char *pcm_name;
snd_pcm_uframes_t m_chunk_size = 0;
//prebuffer
uchar *m_prebuf = nullptr;
qint64 m_prebuf_size = 0;
qint64 m_prebuf_fill = 0;
bool m_can_pause = false;
//channel conversions
QHash <quint16, Qmmp::ChannelPosition> m_alsa_channels;
};
class VolumeALSA : public Volume
{
Q_OBJECT
public:
VolumeALSA();
virtual ~VolumeALSA();
void setVolume(const VolumeSettings &vol) override;
VolumeSettings volume() const override;
VolumeFlags flags() const override;
private:
//alsa mixer
int setupMixer(QString card, QString device);
void parseMixerName(char *str, char **name, int *index);
int getMixer(snd_mixer_t **m_mixer, QString card);
snd_mixer_elem_t* getMixerElem(snd_mixer_t *m_mixer, char *name, int index);
snd_mixer_t *m_mixer = nullptr;
snd_mixer_elem_t *pcm_element = nullptr;
};
#endif // OUTPUTALSA_H
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