mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 20:28:54 +01:00
122 lines
3.9 KiB
C++
Vendored
122 lines
3.9 KiB
C++
Vendored
/*
|
|
* Copyright 2019 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.
|
|
*/
|
|
|
|
#ifndef OBOE_QUIRKS_MANAGER_H
|
|
#define OBOE_QUIRKS_MANAGER_H
|
|
|
|
#include <memory>
|
|
#include "oboe_oboe_AudioStreamBuilder_android.h"
|
|
#include "oboe_aaudio_AudioStreamAAudio_android.h"
|
|
|
|
namespace oboe {
|
|
|
|
/**
|
|
* INTERNAL USE ONLY.
|
|
*
|
|
* Based on manufacturer, model and Android version number
|
|
* decide whether data conversion needs to occur.
|
|
*
|
|
* This also manages device and version specific workarounds.
|
|
*/
|
|
|
|
class QuirksManager {
|
|
public:
|
|
|
|
static QuirksManager &getInstance() {
|
|
static QuirksManager instance; // singleton
|
|
return instance;
|
|
}
|
|
|
|
QuirksManager();
|
|
virtual ~QuirksManager() = default;
|
|
|
|
/**
|
|
* Do we need to do channel, format or rate conversion to provide a low latency
|
|
* stream for this builder? If so then provide a builder for the native child stream
|
|
* that will be used to get low latency.
|
|
*
|
|
* @param builder builder provided by application
|
|
* @param childBuilder modified builder appropriate for the underlying device
|
|
* @return true if conversion is needed
|
|
*/
|
|
bool isConversionNeeded(const AudioStreamBuilder &builder, AudioStreamBuilder &childBuilder);
|
|
|
|
static bool isMMapUsed(AudioStream &stream) {
|
|
bool answer = false;
|
|
if (stream.getAudioApi() == AudioApi::AAudio) {
|
|
AudioStreamAAudio *streamAAudio =
|
|
reinterpret_cast<AudioStreamAAudio *>(&stream);
|
|
answer = streamAAudio->isMMapUsed();
|
|
}
|
|
return answer;
|
|
}
|
|
|
|
virtual int32_t clipBufferSize(AudioStream &stream, int32_t bufferSize) {
|
|
return mDeviceQuirks->clipBufferSize(stream, bufferSize);
|
|
}
|
|
|
|
class DeviceQuirks {
|
|
public:
|
|
virtual ~DeviceQuirks() = default;
|
|
|
|
/**
|
|
* Restrict buffer size. This is mainly to avoid glitches caused by MMAP
|
|
* timestamp inaccuracies.
|
|
* @param stream
|
|
* @param requestedSize
|
|
* @return
|
|
*/
|
|
int32_t clipBufferSize(AudioStream &stream, int32_t requestedSize);
|
|
|
|
// Exclusive MMAP streams can have glitches because they are using a timing
|
|
// model of the DSP to control IO instead of direct synchronization.
|
|
virtual int32_t getExclusiveBottomMarginInBursts() const {
|
|
return kDefaultBottomMarginInBursts;
|
|
}
|
|
|
|
virtual int32_t getExclusiveTopMarginInBursts() const {
|
|
return kDefaultTopMarginInBursts;
|
|
}
|
|
|
|
// On some devices, you can open a mono stream but it is actually running in stereo!
|
|
virtual bool isMonoMMapActuallyStereo() const {
|
|
return false;
|
|
}
|
|
|
|
virtual bool isAAudioMMapPossible(const AudioStreamBuilder &builder) const;
|
|
|
|
static constexpr int32_t kDefaultBottomMarginInBursts = 0;
|
|
static constexpr int32_t kDefaultTopMarginInBursts = 0;
|
|
|
|
// For Legacy streams, do not let the buffer go below one burst.
|
|
// b/129545119 | AAudio Legacy allows setBufferSizeInFrames too low
|
|
// Fixed in Q
|
|
static constexpr int32_t kLegacyBottomMarginInBursts = 1;
|
|
static constexpr int32_t kCommonNativeRate = 48000; // very typical native sample rate
|
|
};
|
|
|
|
private:
|
|
|
|
static constexpr int32_t kChannelCountMono = 1;
|
|
static constexpr int32_t kChannelCountStereo = 2;
|
|
|
|
std::unique_ptr<DeviceQuirks> mDeviceQuirks{};
|
|
|
|
};
|
|
|
|
}
|
|
#endif //OBOE_QUIRKS_MANAGER_H
|