70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2020 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#pragma once
|
|
#include <memory>
|
|
#include <tinyalsa/asoundlib.h>
|
|
|
|
namespace android {
|
|
namespace hardware {
|
|
namespace audio {
|
|
namespace CPP_VERSION {
|
|
namespace implementation {
|
|
namespace talsa {
|
|
|
|
constexpr unsigned int kPcmDevice = 0;
|
|
constexpr unsigned int kPcmCard = 0;
|
|
|
|
struct PcmPeriodSettings {
|
|
unsigned periodCount;
|
|
unsigned periodSizeMultiplier;
|
|
};
|
|
|
|
void init();
|
|
PcmPeriodSettings pcmGetPcmPeriodSettings();
|
|
unsigned pcmGetHostLatencyMs();
|
|
|
|
typedef struct pcm pcm_t;
|
|
struct PcmDeleter { void operator()(pcm_t *x) const; };
|
|
typedef std::unique_ptr<pcm_t, PcmDeleter> PcmPtr;
|
|
PcmPtr pcmOpen(unsigned int dev, unsigned int card, unsigned int nChannels,
|
|
size_t sampleRateHz, size_t frameCount, bool isOut);
|
|
bool pcmRead(pcm_t *pcm, void *data, unsigned int count);
|
|
bool pcmWrite(pcm_t *pcm, const void *data, unsigned int count);
|
|
|
|
class Mixer {
|
|
public:
|
|
Mixer(unsigned card);
|
|
~Mixer();
|
|
|
|
operator bool() const { return mMixer != nullptr; }
|
|
|
|
Mixer(const Mixer &) = delete;
|
|
Mixer &operator=(const Mixer &) = delete;
|
|
Mixer(Mixer &&) = delete;
|
|
Mixer &operator=(Mixer &&) = delete;
|
|
|
|
private:
|
|
struct mixer *mMixer;
|
|
};
|
|
|
|
} // namespace talsa
|
|
} // namespace implementation
|
|
} // namespace CPP_VERSION
|
|
} // namespace audio
|
|
} // namespace hardware
|
|
} // namespace android
|