🛠️🐜 Antkeeper superbuild with dependencies included
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384 lines
13 KiB
384 lines
13 KiB
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#include "config.h"
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#include "oboe.h"
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#include <cassert>
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#include <cstring>
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#include <stdint.h>
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#include "alnumeric.h"
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#include "core/device.h"
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#include "core/logging.h"
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#include "oboe/Oboe.h"
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namespace {
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constexpr char device_name[] = "Oboe Default";
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struct OboePlayback final : public BackendBase, public oboe::AudioStreamCallback {
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OboePlayback(DeviceBase *device) : BackendBase{device} { }
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oboe::ManagedStream mStream;
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oboe::DataCallbackResult onAudioReady(oboe::AudioStream *oboeStream, void *audioData,
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int32_t numFrames) override;
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void open(const char *name) override;
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bool reset() override;
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void start() override;
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void stop() override;
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};
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oboe::DataCallbackResult OboePlayback::onAudioReady(oboe::AudioStream *oboeStream, void *audioData,
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int32_t numFrames)
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{
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assert(numFrames > 0);
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const int32_t numChannels{oboeStream->getChannelCount()};
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mDevice->renderSamples(audioData, static_cast<uint32_t>(numFrames),
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static_cast<uint32_t>(numChannels));
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return oboe::DataCallbackResult::Continue;
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}
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void OboePlayback::open(const char *name)
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{
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if(!name)
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name = device_name;
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else if(std::strcmp(name, device_name) != 0)
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throw al::backend_exception{al::backend_error::NoDevice, "Device name \"%s\" not found",
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name};
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/* Open a basic output stream, just to ensure it can work. */
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oboe::ManagedStream stream;
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oboe::Result result{oboe::AudioStreamBuilder{}.setDirection(oboe::Direction::Output)
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->setPerformanceMode(oboe::PerformanceMode::LowLatency)
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->openManagedStream(stream)};
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to create stream: %s",
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oboe::convertToText(result)};
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mDevice->DeviceName = name;
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}
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bool OboePlayback::reset()
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{
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oboe::AudioStreamBuilder builder;
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builder.setDirection(oboe::Direction::Output);
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builder.setPerformanceMode(oboe::PerformanceMode::LowLatency);
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/* Don't let Oboe convert. We should be able to handle anything it gives
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* back.
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*/
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builder.setSampleRateConversionQuality(oboe::SampleRateConversionQuality::None);
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builder.setChannelConversionAllowed(false);
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builder.setFormatConversionAllowed(false);
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builder.setCallback(this);
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if(mDevice->Flags.test(FrequencyRequest))
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builder.setSampleRate(static_cast<int32_t>(mDevice->Frequency));
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if(mDevice->Flags.test(ChannelsRequest))
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{
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/* Only use mono or stereo at user request. There's no telling what
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* other counts may be inferred as.
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*/
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builder.setChannelCount((mDevice->FmtChans==DevFmtMono) ? oboe::ChannelCount::Mono
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: (mDevice->FmtChans==DevFmtStereo) ? oboe::ChannelCount::Stereo
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: oboe::ChannelCount::Unspecified);
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}
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if(mDevice->Flags.test(SampleTypeRequest))
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{
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oboe::AudioFormat format{oboe::AudioFormat::Unspecified};
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switch(mDevice->FmtType)
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{
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case DevFmtByte:
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case DevFmtUByte:
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case DevFmtShort:
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case DevFmtUShort:
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format = oboe::AudioFormat::I16;
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break;
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case DevFmtInt:
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case DevFmtUInt:
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case DevFmtFloat:
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format = oboe::AudioFormat::Float;
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break;
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}
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builder.setFormat(format);
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}
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oboe::Result result{builder.openManagedStream(mStream)};
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/* If the format failed, try asking for the defaults. */
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while(result == oboe::Result::ErrorInvalidFormat)
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{
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if(builder.getFormat() != oboe::AudioFormat::Unspecified)
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builder.setFormat(oboe::AudioFormat::Unspecified);
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else if(builder.getSampleRate() != oboe::kUnspecified)
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builder.setSampleRate(oboe::kUnspecified);
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else if(builder.getChannelCount() != oboe::ChannelCount::Unspecified)
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builder.setChannelCount(oboe::ChannelCount::Unspecified);
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else
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break;
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result = builder.openManagedStream(mStream);
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}
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to create stream: %s",
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oboe::convertToText(result)};
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mStream->setBufferSizeInFrames(mini(static_cast<int32_t>(mDevice->BufferSize),
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mStream->getBufferCapacityInFrames()));
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TRACE("Got stream with properties:\n%s", oboe::convertToText(mStream.get()));
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if(static_cast<uint>(mStream->getChannelCount()) != mDevice->channelsFromFmt())
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{
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if(mStream->getChannelCount() >= 2)
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mDevice->FmtChans = DevFmtStereo;
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else if(mStream->getChannelCount() == 1)
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mDevice->FmtChans = DevFmtMono;
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else
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throw al::backend_exception{al::backend_error::DeviceError,
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"Got unhandled channel count: %d", mStream->getChannelCount()};
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}
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setDefaultWFXChannelOrder();
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switch(mStream->getFormat())
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{
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case oboe::AudioFormat::I16:
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mDevice->FmtType = DevFmtShort;
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break;
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case oboe::AudioFormat::Float:
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mDevice->FmtType = DevFmtFloat;
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break;
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case oboe::AudioFormat::Unspecified:
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case oboe::AudioFormat::Invalid:
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throw al::backend_exception{al::backend_error::DeviceError,
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"Got unhandled sample type: %s", oboe::convertToText(mStream->getFormat())};
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}
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mDevice->Frequency = static_cast<uint32_t>(mStream->getSampleRate());
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/* Ensure the period size is no less than 10ms. It's possible for FramesPerCallback to be 0
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* indicating variable updates, but OpenAL should have a reasonable minimum update size set.
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* FramesPerBurst may not necessarily be correct, but hopefully it can act as a minimum
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* update size.
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*/
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mDevice->UpdateSize = maxu(mDevice->Frequency / 100,
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static_cast<uint32_t>(mStream->getFramesPerBurst()));
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mDevice->BufferSize = maxu(mDevice->UpdateSize * 2,
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static_cast<uint32_t>(mStream->getBufferSizeInFrames()));
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return true;
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}
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void OboePlayback::start()
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{
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const oboe::Result result{mStream->start()};
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to start stream: %s",
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oboe::convertToText(result)};
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}
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void OboePlayback::stop()
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{
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oboe::Result result{mStream->stop()};
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to stop stream: %s",
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oboe::convertToText(result)};
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}
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struct OboeCapture final : public BackendBase {
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OboeCapture(DeviceBase *device) : BackendBase{device} { }
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oboe::ManagedStream mStream;
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std::vector<al::byte> mSamples;
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uint mLastAvail{0u};
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void open(const char *name) override;
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void start() override;
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void stop() override;
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void captureSamples(al::byte *buffer, uint samples) override;
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uint availableSamples() override;
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};
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void OboeCapture::open(const char *name)
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{
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if(!name)
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name = device_name;
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else if(std::strcmp(name, device_name) != 0)
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throw al::backend_exception{al::backend_error::NoDevice, "Device name \"%s\" not found",
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name};
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oboe::AudioStreamBuilder builder;
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builder.setDirection(oboe::Direction::Input)
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->setPerformanceMode(oboe::PerformanceMode::LowLatency)
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->setSampleRateConversionQuality(oboe::SampleRateConversionQuality::High)
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->setChannelConversionAllowed(true)
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->setFormatConversionAllowed(true)
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->setBufferCapacityInFrames(static_cast<int32_t>(mDevice->BufferSize))
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->setSampleRate(static_cast<int32_t>(mDevice->Frequency));
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/* Only use mono or stereo at user request. There's no telling what
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* other counts may be inferred as.
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*/
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switch(mDevice->FmtChans)
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{
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case DevFmtMono:
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builder.setChannelCount(oboe::ChannelCount::Mono);
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break;
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case DevFmtStereo:
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builder.setChannelCount(oboe::ChannelCount::Stereo);
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break;
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case DevFmtQuad:
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case DevFmtX51:
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case DevFmtX61:
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case DevFmtX71:
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case DevFmtAmbi3D:
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throw al::backend_exception{al::backend_error::DeviceError, "%s capture not supported",
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DevFmtChannelsString(mDevice->FmtChans)};
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}
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/* FIXME: This really should support UByte, but Oboe doesn't. We'll need to
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* use a temp buffer and convert.
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*/
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switch(mDevice->FmtType)
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{
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case DevFmtShort:
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builder.setFormat(oboe::AudioFormat::I16);
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break;
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case DevFmtFloat:
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builder.setFormat(oboe::AudioFormat::Float);
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break;
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case DevFmtByte:
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case DevFmtUByte:
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case DevFmtUShort:
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case DevFmtInt:
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case DevFmtUInt:
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throw al::backend_exception{al::backend_error::DeviceError,
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"%s capture samples not supported", DevFmtTypeString(mDevice->FmtType)};
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}
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oboe::Result result{builder.openManagedStream(mStream)};
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to create stream: %s",
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oboe::convertToText(result)};
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if(static_cast<int32_t>(mDevice->BufferSize) > mStream->getBufferCapacityInFrames())
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throw al::backend_exception{al::backend_error::DeviceError,
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"Buffer size too large (%u > %d)", mDevice->BufferSize,
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mStream->getBufferCapacityInFrames()};
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auto buffer_result = mStream->setBufferSizeInFrames(static_cast<int32_t>(mDevice->BufferSize));
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if(!buffer_result)
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to set buffer size: %s", oboe::convertToText(buffer_result.error())};
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else if(buffer_result.value() < static_cast<int32_t>(mDevice->BufferSize))
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to set large enough buffer size (%u > %d)", mDevice->BufferSize,
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buffer_result.value()};
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mDevice->BufferSize = static_cast<uint>(buffer_result.value());
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TRACE("Got stream with properties:\n%s", oboe::convertToText(mStream.get()));
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mDevice->DeviceName = name;
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}
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void OboeCapture::start()
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{
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const oboe::Result result{mStream->start()};
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to start stream: %s",
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oboe::convertToText(result)};
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}
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void OboeCapture::stop()
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{
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/* Capture any unread samples before stopping. Oboe drops whatever's left
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* in the stream.
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*/
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if(auto availres = mStream->getAvailableFrames())
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{
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const auto avail = std::max(static_cast<uint>(availres.value()), mLastAvail);
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const size_t frame_size{static_cast<uint32_t>(mStream->getBytesPerFrame())};
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const size_t pos{mSamples.size()};
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mSamples.resize(pos + avail*frame_size);
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auto result = mStream->read(&mSamples[pos], availres.value(), 0);
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uint got{bool{result} ? static_cast<uint>(result.value()) : 0u};
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if(got < avail)
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std::fill_n(&mSamples[pos + got*frame_size], (avail-got)*frame_size, al::byte{});
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mLastAvail = 0;
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}
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const oboe::Result result{mStream->stop()};
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if(result != oboe::Result::OK)
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throw al::backend_exception{al::backend_error::DeviceError, "Failed to stop stream: %s",
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oboe::convertToText(result)};
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}
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uint OboeCapture::availableSamples()
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{
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/* Keep track of the max available frame count, to ensure it doesn't go
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* backwards.
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*/
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if(auto result = mStream->getAvailableFrames())
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mLastAvail = std::max(static_cast<uint>(result.value()), mLastAvail);
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const auto frame_size = static_cast<uint32_t>(mStream->getBytesPerFrame());
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return static_cast<uint>(mSamples.size()/frame_size) + mLastAvail;
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}
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void OboeCapture::captureSamples(al::byte *buffer, uint samples)
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{
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const auto frame_size = static_cast<uint>(mStream->getBytesPerFrame());
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if(const size_t storelen{mSamples.size()})
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{
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const auto instore = static_cast<uint>(storelen / frame_size);
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const uint tocopy{std::min(samples, instore) * frame_size};
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std::copy_n(mSamples.begin(), tocopy, buffer);
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mSamples.erase(mSamples.begin(), mSamples.begin() + tocopy);
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buffer += tocopy;
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samples -= tocopy/frame_size;
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if(!samples) return;
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}
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auto result = mStream->read(buffer, static_cast<int32_t>(samples), 0);
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uint got{bool{result} ? static_cast<uint>(result.value()) : 0u};
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if(got < samples)
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std::fill_n(buffer + got*frame_size, (samples-got)*frame_size, al::byte{});
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mLastAvail = std::max(mLastAvail, samples) - samples;
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}
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} // namespace
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bool OboeBackendFactory::init() { return true; }
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bool OboeBackendFactory::querySupport(BackendType type)
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{ return type == BackendType::Playback || type == BackendType::Capture; }
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std::string OboeBackendFactory::probe(BackendType type)
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{
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switch(type)
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{
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case BackendType::Playback:
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case BackendType::Capture:
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/* Includes null char. */
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return std::string{device_name, sizeof(device_name)};
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}
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return std::string{};
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}
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BackendPtr OboeBackendFactory::createBackend(DeviceBase *device, BackendType type)
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{
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if(type == BackendType::Playback)
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return BackendPtr{new OboePlayback{device}};
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if(type == BackendType::Capture)
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return BackendPtr{new OboeCapture{device}};
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return BackendPtr{};
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}
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BackendFactory &OboeBackendFactory::getFactory()
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{
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static OboeBackendFactory factory{};
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return factory;
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}
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