1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 #include <memory>
19 #include <tinyalsa/asoundlib.h>
20 
21 namespace android {
22 namespace hardware {
23 namespace audio {
24 namespace V6_0 {
25 namespace implementation {
26 namespace talsa {
27 
28 constexpr unsigned int kPcmDevice = 0;
29 constexpr unsigned int kPcmCard = 0;
30 
31 typedef struct pcm pcm_t;
32 struct PcmDeleter { void operator()(pcm_t *x) const; };
33 typedef std::unique_ptr<pcm_t, PcmDeleter> PcmPtr;
34 PcmPtr pcmOpen(unsigned int dev, unsigned int card, unsigned int nChannels, size_t sampleRateHz, size_t frameCount, bool isOut);
35 
36 class Mixer {
37 public:
38     Mixer(unsigned card);
39     ~Mixer();
40 
41     operator bool() const { return mMixer != nullptr; }
42 
43     Mixer(const Mixer &) = delete;
44     Mixer &operator=(const Mixer &) = delete;
45     Mixer(Mixer &&) = delete;
46     Mixer &operator=(Mixer &&) = delete;
47 
48 private:
49     struct mixer *mMixer;
50 };
51 
52 }  // namespace talsa
53 }  // namespace implementation
54 }  // namespace V6_0
55 }  // namespace audio
56 }  // namespace hardware
57 }  // namespace android
58