blob: c7585e05833f21f7da4dbe5af1644c4865cab5b9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* alsa.h
*
* Do 21. Jan 16:48:32 CET 2016
* Copyright 2016 Christian Glöckner
* cgloeckner@freenet.de
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#pragma once
// Use the newer ALSA API
#define ALSA_PCM_NEW_HW_PARAMS_API
#include <audiotypes.h>
#include <alsa/asoundlib.h>
#include "audiooutputengine.h"
class AlsaOutputEngine
: public AudioOutputEngine {
public:
AlsaOutputEngine();
~AlsaOutputEngine();
// based on AudioOutputEngine
bool init(Channels chan) override;
void setParm(std::string parm, std::string value) override;
bool start() override;
void stop() override;
void pre(size_t nsamples) override;
void run(int ch, sample_t* samples, size_t nsamples) override;
void post(size_t nsamples) override;
size_t samplerate() override;
private:
snd_pcm_t* handle;
snd_pcm_hw_params_t* params;
std::vector<sample_t> data;
size_t num_channels;
std::string dev;
unsigned int srate; // samplerate
snd_pcm_uframes_t frames;
};
|
