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Oboe improvements

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Add latency tuner
Read defaults from environment
This commit is contained in:
badaix 2020-01-30 08:46:38 +01:00
parent 75a0813fce
commit c9474c6d51
2 changed files with 49 additions and 19 deletions
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64
client/player/oboe_player.cpp
View file

@ -32,16 +32,41 @@ static constexpr double kDefaultLatency = 50;
OboePlayer::OboePlayer(const PcmDevice& pcmDevice, std::shared_ptr<Stream> stream) : Player(pcmDevice, stream)
{
LOG(DEBUG, LOG_TAG) << "Contructor\n";
oboe::AudioStreamBuilder builder;
char* env = getenv("SAMPLE_RATE");
if (env)
oboe::DefaultStreamValues::SampleRate = cpt::stoi(env, oboe::DefaultStreamValues::SampleRate);
env = getenv("FRAMES_PER_BUFFER");
if (env)
oboe::DefaultStreamValues::FramesPerBurst = cpt::stoi(env, oboe::DefaultStreamValues::FramesPerBurst);
LOG(INFO) << "DefaultStreamValues::SampleRate: " << oboe::DefaultStreamValues::SampleRate
<< ", DefaultStreamValues::FramesPerBurst: " << oboe::DefaultStreamValues::FramesPerBurst << "\n";
// The builder set methods can be chained for convenience.
builder.setSharingMode(oboe::SharingMode::Exclusive)
->setPerformanceMode(oboe::PerformanceMode::LowLatency)
->setChannelCount(stream->getFormat().channels)
->setSampleRate(stream->getFormat().rate)
->setFormat(oboe::AudioFormat::I16)
->setCallback(this)
//->setFramesPerCallback((20 * stream->getFormat().rate) / 1000)
->openManagedStream(out_stream_);
oboe::AudioStreamBuilder builder;
auto result = builder.setSharingMode(oboe::SharingMode::Exclusive)
->setPerformanceMode(oboe::PerformanceMode::LowLatency)
->setChannelCount(stream->getFormat().channels)
->setSampleRate(stream->getFormat().rate)
->setFormat(oboe::AudioFormat::I16)
->setCallback(this)
->setDirection(oboe::Direction::Output)
->setFramesPerCallback((16 * stream->getFormat().rate) / 1000)
//->setFramesPerCallback(2 * oboe::DefaultStreamValues::FramesPerBurst)
//->setFramesPerCallback(960) // 2*192)
->openManagedStream(out_stream_);
LOG(INFO) << "BufferSizeInFrames: " << out_stream_->getBufferSizeInFrames() << ", FramesPerBurst: " << out_stream_->getFramesPerBurst() << "\n";
if (result != oboe::Result::OK)
LOG(ERROR, LOG_TAG) << "Error building AudioStream: " << oboe::convertToText(result) << "\n";
if (out_stream_->getAudioApi() == oboe::AudioApi::AAudio)
{
mLatencyTuner = std::make_unique<oboe::LatencyTuner>(*out_stream_);
}
else
{
out_stream_->setBufferSizeInFrames(4 * out_stream_->getFramesPerBurst());
}
}
@ -49,7 +74,9 @@ OboePlayer::~OboePlayer()
{
LOG(DEBUG, LOG_TAG) << "Destructor\n";
stop();
out_stream_->stop(std::chrono::nanoseconds(100ms).count());
auto result = out_stream_->stop(std::chrono::nanoseconds(100ms).count());
if (result != oboe::Result::OK)
LOG(ERROR, LOG_TAG) << "Error in AudioStream::stop: " << oboe::convertToText(result) << "\n";
}
@ -87,14 +114,11 @@ double OboePlayer::getCurrentOutputLatencyMillis() const
oboe::DataCallbackResult OboePlayer::onAudioReady(oboe::AudioStream* /*oboeStream*/, void* audioData, int32_t numFrames)
{
if (mLatencyTuner)
mLatencyTuner->tune();
// int32_t buffer_fill_size = oboeStream->getBufferCapacityInFrames() - numFrames;
// double delay_ms = static_cast<double>(oboeStream->getBufferCapacityInFrames()) / stream_->getFormat().msRate();
// LOG(INFO, LOG_TAG) << "onAudioReady frames: " << numFrames << ", capacity: " << oboeStream->getBufferCapacityInFrames() << ", size: " <<
// oboeStream->getBufferSizeInFrames() << ", available: " << oboeStream->getAvailableFrames() << ", delay ms: " << delay_ms << "\n";
double output_latency = getCurrentOutputLatencyMillis();
// LOG(INFO, LOG_TAG) << "getCurrentOutputLatencyMillis: " << output_latency << "\n";
// LOG(INFO, LOG_TAG) << "getCurrentOutputLatencyMillis: " << output_latency << ", frames: " << numFrames << "\n";
chronos::usec delay(static_cast<int>(output_latency * 1000.));
if (!stream_->getPlayerChunk(audioData, delay, numFrames))
@ -115,14 +139,18 @@ void OboePlayer::start()
{
// Typically, start the stream after querying some stream information, as well as some input from the user
LOG(INFO, LOG_TAG) << "Start\n";
out_stream_->requestStart();
auto result = out_stream_->requestStart();
if (result != oboe::Result::OK)
LOG(ERROR, LOG_TAG) << "Error in requestStart: " << oboe::convertToText(result) << "\n";
}
void OboePlayer::stop()
{
LOG(INFO, LOG_TAG) << "Stop\n";
out_stream_->requestStop();
auto result = out_stream_->requestStop();
if (result != oboe::Result::OK)
LOG(ERROR, LOG_TAG) << "Error in requestStop: " << oboe::convertToText(result) << "\n";
}

4
client/player/oboe_player.hpp
View file

@ -19,6 +19,7 @@
#ifndef OBOE_PLAYER_HPP
#define OBOE_PLAYER_HPP
#include <oboe/LatencyTuner.h>
#include <oboe/Oboe.h>
#include "player.hpp"
@ -44,8 +45,9 @@ protected:
double getCurrentOutputLatencyMillis() const;
void worker() override;
oboe::ManagedStream out_stream_;
std::unique_ptr<oboe::LatencyTuner> mLatencyTuner;
};