mirror of
https://github.com/gnif/LookingGlass.git
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348f92d8b6
Add optional playback and capture streams to the LGMP transport. Negotiate ownership over the existing control path and keep audio availability isolated from display transport readiness. Route broker packets through public LGMP stream APIs without changing the LGMP queue table or shared-memory mapping.
1759 lines
55 KiB
C++
1759 lines
55 KiB
C++
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <ntstatus.h>
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#include "transport/lgmp/CLGMPAudioTransport.h"
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#include <wudfwdm.h>
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#include "CDebug.h"
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#include "WCWrite.h"
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#include "transport/lgmp/CLGMPControl.h"
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#include "transport/lgmp/CLGMPHost.h"
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#include <initializer_list>
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#include <limits>
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#include <string.h>
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namespace
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{
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static_assert(AUDIO_MAX_CHANNELS == KVMFR_AUDIO_MAX_CHANNELS,
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"audio channel limits differ");
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static_assert(AUDIO_STREAM_MAX_CHANNELS ==
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KVMFR_AUDIO_STREAM_MAX_CHANNELS,
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"audio stream channel limits differ");
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static_assert(AUDIO_MAX_FRAMES_PER_PACKET ==
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KVMFR_AUDIO_MAX_FRAMES_PER_PACKET,
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"audio packet limits differ");
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static_assert(AUDIO_MAX_PCM_BYTES == KVMFR_AUDIO_PCM_BYTES,
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"audio PCM limits differ");
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static_assert(static_cast<uint32_t>(AUDIO_CAP_PLAYBACK) ==
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static_cast<uint32_t>(KVMFR_AUDIO_CAP_PLAYBACK) &&
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static_cast<uint32_t>(AUDIO_CAP_CAPTURE) ==
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static_cast<uint32_t>(KVMFR_AUDIO_CAP_CAPTURE) &&
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static_cast<uint32_t>(AUDIO_CAP_CLOCK_FEEDBACK) ==
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static_cast<uint32_t>(KVMFR_AUDIO_CAP_CLOCK_FEEDBACK),
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"audio capability bits differ");
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static_assert(sizeof(LGMPStreamDescriptor) ==
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sizeof(KVMFRStreamDescriptor),
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"LGMP and KVMFR stream descriptor sizes differ");
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constexpr uint32_t AUDIO_CAPABILITY_MASK =
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KVMFR_AUDIO_CAP_PLAYBACK | KVMFR_AUDIO_CAP_CAPTURE |
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KVMFR_AUDIO_CAP_CLOCK_FEEDBACK;
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constexpr uint32_t AUDIO_DIRECTION_MASK =
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KVMFR_AUDIO_CAP_PLAYBACK | KVMFR_AUDIO_CAP_CAPTURE;
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constexpr uint32_t AUDIO_PACKET_FLAG_MASK =
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AUDIO_PACKET_DISCONTINUITY | AUDIO_PACKET_SILENT |
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AUDIO_PACKET_CLOCK_VALID | AUDIO_PACKET_CLOCK_STABLE;
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constexpr uint32_t WIRE_PACKET_FLAG_MASK =
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KVMFR_AUDIO_MESSAGE_DISCONTINUITY |
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KVMFR_AUDIO_MESSAGE_SILENT |
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KVMFR_AUDIO_MESSAGE_CLOCK_VALID |
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KVMFR_AUDIO_MESSAGE_CLOCK_STABLE;
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constexpr size_t AUDIO_SHARED_MEMORY_PREFLIGHT =
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2U * 1024U * 1024U;
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uint32_t ChannelCount(uint32_t mask)
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{
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uint32_t count = 0;
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while (mask)
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{
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count += mask & 1U;
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mask >>= 1;
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}
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return count;
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}
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uint64_t NextSerial(uint64_t serial)
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{
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++serial;
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return serial ? serial : 1;
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}
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bool RequestNewer(uint32_t candidate, uint32_t previous)
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{
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return candidate != previous &&
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static_cast<int32_t>(candidate - previous) > 0;
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}
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}
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CLGMPAudioTransport::~CLGMPAudioTransport()
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{
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TransportStop();
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CSRWExclusiveLock lock(m_lock);
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for (ResponseMemory& response : m_responseMemory)
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lgmpHostMemFree(&response.memory);
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FreeStreams();
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m_initialized = false;
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}
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bool CLGMPAudioTransport::SameFormat(
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const AudioFormat& left, const AudioFormat& right)
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{
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return left.sampleRate == right.sampleRate &&
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left.channelMask == right.channelMask &&
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left.channels == right.channels &&
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left.containerBits == right.containerBits &&
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left.validBits == right.validBits &&
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left.blockAlign == right.blockAlign;
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}
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bool CLGMPAudioTransport::SamePacket(
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const AudioPacket& left, const AudioPacket& right)
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{
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return left.endpointGeneration == right.endpointGeneration &&
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left.streamGeneration == right.streamGeneration &&
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left.flags == right.flags && left.frames == right.frames &&
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left.position == right.position && left.timeNs == right.timeNs &&
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left.rateQ32 == right.rateQ32 &&
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SameFormat(left.format, right.format);
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}
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bool CLGMPAudioTransport::ValidFormat(const AudioFormat& format)
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{
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if (!format.sampleRate ||
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format.sampleRate > KVMFR_AUDIO_MAX_SAMPLE_RATE ||
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!format.channels ||
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format.channels > KVMFR_AUDIO_STREAM_MAX_CHANNELS ||
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!format.channelMask ||
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(format.channelMask & ~KVMFR_AUDIO_CHANNEL_POSITION_MASK) ||
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ChannelCount(format.channelMask) != format.channels)
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return false;
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const bool s16 = format.containerBits == 16 && format.validBits == 16;
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const bool s24 = format.containerBits == 24 && format.validBits == 24;
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const uint16_t bytes = static_cast<uint16_t>(
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format.channels * (format.containerBits / 8U));
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return (s16 || s24) && format.blockAlign == bytes;
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}
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KVMFRAudioFormat CLGMPAudioTransport::WireFormat(
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const AudioFormat& format)
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{
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KVMFRAudioFormat result = {};
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result.version = KVMFR_AUDIO_FORMAT_VERSION;
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result.size = sizeof(result);
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result.sampleFormat = format.containerBits == 16 ?
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KVMFR_AUDIO_SAMPLE_S16_LE : KVMFR_AUDIO_SAMPLE_S24_LE;
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result.sampleRate = format.sampleRate;
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result.channelMask = format.channelMask;
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result.channelCount = format.channels;
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result.validBits = format.validBits;
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result.containerBits = format.containerBits;
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result.blockAlign = format.blockAlign;
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return result;
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}
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KVMFRAudioStreamState CLGMPAudioTransport::WireState(
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AudioStreamState state)
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{
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switch (state)
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{
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case AudioStreamState::ACQUIRED:
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return KVMFR_AUDIO_STREAM_ACQUIRED;
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case AudioStreamState::PAUSED:
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return KVMFR_AUDIO_STREAM_PAUSED;
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case AudioStreamState::RUNNING:
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return KVMFR_AUDIO_STREAM_RUNNING;
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default:
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return KVMFR_AUDIO_STREAM_STOPPED;
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}
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}
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KVMFRStreamDescriptor CLGMPAudioTransport::WireDescriptor(
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const LGMPStreamDescriptor& descriptor)
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{
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KVMFRStreamDescriptor wire = {};
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wire.magic = descriptor.magic;
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wire.version = descriptor.version;
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wire.size = descriptor.size;
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wire.offset = descriptor.offset;
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wire.regionSize = descriptor.regionSize;
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wire.direction = descriptor.direction;
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wire.policy = descriptor.policy;
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wire.slotCount = descriptor.slotCount;
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wire.slotSize = descriptor.slotSize;
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return wire;
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}
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bool CLGMPAudioTransport::InitializeStreams()
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{
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const LGMPStreamConfig hostToClient =
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{
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LGMP_STREAM_HOST_TO_CLIENT,
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LGMP_STREAM_RELIABLE_FIFO,
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KVMFR_AUDIO_STREAM_SLOT_COUNT,
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static_cast<uint32_t>(KVMFR_AUDIO_STREAM_SLOT_BYTES),
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};
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LGMP_STATUS status = m_host.CreateStream(
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hostToClient, &m_hostToClientStream);
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if (status != LGMP_OK)
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{
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DEBUG_ERROR("Failed to create host-to-client audio stream: %s",
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lgmpStatusString(status));
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return false;
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}
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const LGMPStreamConfig clientToHost =
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{
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LGMP_STREAM_CLIENT_TO_HOST,
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LGMP_STREAM_RELIABLE_FIFO,
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KVMFR_AUDIO_STREAM_SLOT_COUNT,
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static_cast<uint32_t>(KVMFR_AUDIO_STREAM_SLOT_BYTES),
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};
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status = m_host.CreateStream(clientToHost, &m_clientToHostStream);
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if (status != LGMP_OK)
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{
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DEBUG_ERROR("Failed to create client-to-host audio stream: %s",
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lgmpStatusString(status));
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lgmpHostStreamFree(&m_hostToClientStream);
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return false;
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}
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LGMPStreamDescriptor descriptor = {};
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lgmpHostStreamGetDescriptor(m_hostToClientStream, &descriptor);
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m_hostToClientDescriptor = WireDescriptor(descriptor);
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lgmpHostStreamGetDescriptor(m_clientToHostStream, &descriptor);
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m_clientToHostDescriptor = WireDescriptor(descriptor);
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return true;
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}
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void CLGMPAudioTransport::FreeStreams()
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{
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lgmpHostStreamFree(&m_clientToHostStream);
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lgmpHostStreamFree(&m_hostToClientStream);
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m_clientToHostDescriptor = {};
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m_hostToClientDescriptor = {};
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}
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bool CLGMPAudioTransport::Initialize()
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{
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CSRWExclusiveLock lifecycleLock(m_lifecycleLock);
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CSRWExclusiveLock lock(m_lock);
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if (m_initialized)
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return true;
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// LGMP shared allocations are monotonic. Reserve conservatively before
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// the first one so ordinary shared-memory exhaustion cannot strand a
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// partial optional layout. A later local handle allocation can still fail
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// with LGMP_ERR_NO_MEM, but that is independent of shared capacity.
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if (m_host.Available() < AUDIO_SHARED_MEMORY_PREFLIGHT)
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{
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DEBUG_WARN("LGMP audio requires at least %zu bytes of available "
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"shared memory", AUDIO_SHARED_MEMORY_PREFLIGHT);
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return false;
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}
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if (!InitializeStreams())
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return false;
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LGMP_STATUS status = LGMP_OK;
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for (ResponseMemory& response : m_responseMemory)
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{
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status = m_host.Allocate(sizeof(KVMFRAudioStreamResponse),
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&response.memory);
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if (status != LGMP_OK)
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break;
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memset(lgmpHostMemPtr(response.memory), 0,
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sizeof(KVMFRAudioStreamResponse));
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}
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if (status != LGMP_OK)
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{
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DEBUG_ERROR("Failed to allocate audio response memory: %s",
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lgmpStatusString(status));
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for (ResponseMemory& response : m_responseMemory)
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lgmpHostMemFree(&response.memory);
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FreeStreams();
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return false;
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}
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m_state.generation = 1;
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m_initialized = true;
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return true;
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}
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bool CLGMPAudioTransport::BindStreams(uint32_t clientID)
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{
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LGMP_STATUS status = lgmpHostStreamBind(
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m_hostToClientStream, clientID, nullptr);
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if (status != LGMP_OK)
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{
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DEBUG_WARN("Failed to bind host-to-client audio stream for client "
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"%u: %s", clientID, lgmpStatusString(status));
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return false;
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}
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status = lgmpHostStreamBind(m_clientToHostStream, clientID, nullptr);
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if (status == LGMP_OK)
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return true;
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DEBUG_WARN("Failed to bind client-to-host audio stream for client "
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"%u: %s", clientID, lgmpStatusString(status));
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const LGMP_STATUS rollback =
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lgmpHostStreamUnbind(m_hostToClientStream);
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if (rollback != LGMP_OK && rollback != LGMP_ERR_STREAM_UNBOUND)
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DEBUG_WARN("Failed to roll back the audio stream binding: %s",
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lgmpStatusString(rollback));
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return false;
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}
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bool CLGMPAudioTransport::TryUnbindStreams()
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{
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bool complete = true;
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for (PLGMPHostStream stream :
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{ m_clientToHostStream, m_hostToClientStream })
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{
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if (!stream)
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continue;
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const LGMP_STATUS status = lgmpHostStreamUnbind(stream);
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if (status == LGMP_ERR_STREAM_BUSY)
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complete = false;
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else if (status != LGMP_OK && status != LGMP_ERR_STREAM_UNBOUND)
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{
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Fail("lgmpHostStreamUnbind", status);
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complete = false;
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}
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}
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return complete;
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}
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void CLGMPAudioTransport::ForceUnbindStreams()
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{
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for (PLGMPHostStream stream :
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{ m_clientToHostStream, m_hostToClientStream })
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{
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if (!stream)
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continue;
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const LGMP_STATUS status = lgmpHostStreamForceUnbind(stream);
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if (status != LGMP_OK && status != LGMP_ERR_STREAM_UNBOUND)
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DEBUG_WARN("Failed to force-unbind an audio stream: %s",
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lgmpStatusString(status));
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}
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}
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bool CLGMPAudioTransport::ValidateClaim(
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const KVMFRAudioClaim& claim) const
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{
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if (claim.messageType != KVMFR_MESSAGE_AUDIO_CLAIM ||
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claim.version != KVMFR_AUDIO_CONTROL_VERSION ||
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claim.size != sizeof(claim) || !claim.requestGeneration ||
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claim.flags != KVMFR_AUDIO_CLAIM_BIND || !claim.claimToken ||
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!claim.protocolMin || claim.protocolMin > claim.protocolMax ||
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claim.protocolMin > KVMFR_AUDIO_PROTOCOL_MAX ||
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claim.protocolMax < KVMFR_AUDIO_PROTOCOL_MIN ||
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(claim.clientCapabilities & ~AUDIO_CAPABILITY_MASK) ||
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!(claim.clientCapabilities & AUDIO_DIRECTION_MASK) ||
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claim.reserved0)
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return false;
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for (uint64_t reserved : claim.reserved)
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if (reserved)
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return false;
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return true;
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}
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bool CLGMPAudioTransport::ResponsePending(uint32_t clientID,
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const KVMFRAudioStreamResponse& candidate) const
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{
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for (const PendingResponse& pending : m_pendingResponse)
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if (pending.valid && pending.clientID == clientID &&
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pending.response.requestGeneration ==
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candidate.requestGeneration &&
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pending.response.claimToken == candidate.claimToken &&
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pending.response.result == candidate.result)
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return true;
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for (const ResponseMemory& response : m_responseMemory)
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if (response.valid && response.clientID == clientID &&
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response.requestGeneration == candidate.requestGeneration &&
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response.claimToken == candidate.claimToken &&
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response.result == candidate.result)
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return true;
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return false;
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}
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bool CLGMPAudioTransport::QueueResponse(uint32_t clientID,
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const KVMFRAudioStreamResponse& response)
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{
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if (ResponsePending(clientID, response))
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return true;
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PendingResponse * available = nullptr;
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PendingResponse * sameClient = nullptr;
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for (PendingResponse& pending : m_pendingResponse)
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{
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if (pending.valid && pending.clientID == clientID)
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{
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if (pending.response.result == KVMFR_AUDIO_RESPONSE_BOUND)
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return false;
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if (!sameClient)
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sameClient = &pending;
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continue;
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}
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if (!pending.valid && !available)
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available = &pending;
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}
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if (sameClient)
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available = sameClient;
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if (!available)
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return false;
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available->valid = true;
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available->clientID = clientID;
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available->response = response;
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return true;
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}
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void CLGMPAudioTransport::CleanupResponseMemory()
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{
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for (ResponseMemory& response : m_responseMemory)
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{
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if (!response.valid ||
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m_control.PayloadPending(response.memory))
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continue;
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response.valid = false;
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response.clientID = 0;
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response.requestGeneration = 0;
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response.claimToken = 0;
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response.result = 0;
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}
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}
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void CLGMPAudioTransport::PumpResponses()
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{
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CleanupResponseMemory();
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for (PendingResponse& pending : m_pendingResponse)
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{
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if (!pending.valid)
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continue;
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ResponseMemory * available = nullptr;
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for (ResponseMemory& response : m_responseMemory)
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if (response.memory && !response.valid)
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{
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available = &response;
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break;
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}
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if (!available)
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return;
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memcpy(lgmpHostMemPtr(available->memory), &pending.response,
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sizeof(pending.response));
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WCWrite::Flush();
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unsigned recipients = 0;
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const LGMP_STATUS status = m_control.PostForClient(
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KVMFR_AUDIO_CONTROL_UDATA, available->memory,
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pending.clientID, recipients);
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if (status == LGMP_ERR_QUEUE_FULL)
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return;
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if (status != LGMP_OK)
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{
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Fail("lgmpHostQueuePostForClients(audio)", status);
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return;
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}
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const bool bound =
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pending.response.result == KVMFR_AUDIO_RESPONSE_BOUND;
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if (recipients)
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{
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available->valid = true;
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available->clientID = pending.clientID;
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available->requestGeneration =
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pending.response.requestGeneration;
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available->claimToken = pending.response.claimToken;
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available->result = pending.response.result;
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if (bound && m_ownerState == OwnerState::BOUND &&
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m_ownerClientID == pending.clientID &&
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m_ownerGeneration == pending.response.requestGeneration &&
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m_ownerToken == pending.response.claimToken)
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{
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m_responseAdmitted = true;
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m_statusDirty = true;
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}
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}
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else if (bound && m_ownerState == OwnerState::BOUND &&
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m_ownerClientID == pending.clientID &&
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m_ownerGeneration == pending.response.requestGeneration &&
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m_ownerToken == pending.response.claimToken)
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BeginRelease("audio claimant disappeared");
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pending = {};
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}
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}
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|
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bool CLGMPAudioTransport::OwnerSubscribed() const
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{
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if (!m_ownerClientID)
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return false;
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|
|
uint32_t clients[LGMP_MAX_CLIENTS] = {};
|
|
unsigned count = 0;
|
|
const LGMP_STATUS status = m_control.GetClientIDs(clients, count);
|
|
if (status != LGMP_OK)
|
|
{
|
|
DEBUG_WARN("Failed to query audio owner subscription: %s",
|
|
lgmpStatusString(status));
|
|
return true;
|
|
}
|
|
for (unsigned index = 0; index < count; ++index)
|
|
if (clients[index] == m_ownerClientID)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void CLGMPAudioTransport::RenewLease()
|
|
{
|
|
m_ownerDeadline = GetTickCount64() + KVMFR_AUDIO_OWNER_LEASE_MS;
|
|
}
|
|
|
|
void CLGMPAudioTransport::ReleasePendingCapture()
|
|
{
|
|
if (!m_pendingCapture.valid)
|
|
return;
|
|
const LGMP_STATUS status = lgmpHostStreamReadRelease(
|
|
m_clientToHostStream, &m_pendingCapture.buffer);
|
|
if (status != LGMP_OK && status != LGMP_ERR_STREAM_UNBOUND &&
|
|
status != LGMP_ERR_STREAM_STALE)
|
|
Fail("lgmpHostStreamReadRelease(audio)", status);
|
|
m_pendingCapture = {};
|
|
}
|
|
|
|
void CLGMPAudioTransport::CancelPlaybackCredit()
|
|
{
|
|
if (!m_playbackCreditValid)
|
|
return;
|
|
|
|
const LGMP_STATUS status = lgmpHostStreamWriteCancel(
|
|
m_hostToClientStream, &m_playbackCredit);
|
|
if (status != LGMP_OK && status != LGMP_ERR_STREAM_UNBOUND &&
|
|
status != LGMP_ERR_STREAM_STALE)
|
|
{
|
|
DEBUG_WARN("Failed to cancel an audio playback reservation: %s",
|
|
lgmpStatusString(status));
|
|
m_failed = true;
|
|
}
|
|
m_playbackCredit = {};
|
|
m_playbackCreditValid = false;
|
|
}
|
|
|
|
void CLGMPAudioTransport::ClearBlockedPlayback(bool notify)
|
|
{
|
|
const bool blocked = m_playbackBlocked;
|
|
CancelPlaybackCredit();
|
|
m_playbackBlocked = false;
|
|
m_blockedPlayback = {};
|
|
m_blockedPlaybackSize = 0;
|
|
if (notify && blocked)
|
|
m_playbackReadyPending = true;
|
|
}
|
|
|
|
bool CLGMPAudioTransport::RememberBlockedPlayback(
|
|
const AudioPacket& packet, size_t size)
|
|
{
|
|
if (m_playbackBlocked)
|
|
return size == m_blockedPlaybackSize &&
|
|
SamePacket(packet, m_blockedPlayback);
|
|
|
|
m_playbackBlocked = true;
|
|
m_blockedPlayback = packet;
|
|
m_blockedPlaybackSize = size;
|
|
return true;
|
|
}
|
|
|
|
void CLGMPAudioTransport::BeginRelease(const char * reason)
|
|
{
|
|
if (m_ownerState == OwnerState::NONE)
|
|
return;
|
|
if (m_ownerState != OwnerState::RELEASING)
|
|
{
|
|
DEBUG_INFO("Audio owner %u generation %u releasing: %s",
|
|
m_ownerClientID, m_ownerGeneration, reason);
|
|
m_ownerState = OwnerState::RELEASING;
|
|
m_releaseGeneration = m_state.generation;
|
|
m_deactivationIssued = false;
|
|
m_statusDirty = false;
|
|
m_announcedPlayback = 0;
|
|
m_announcedCapture = 0;
|
|
ClearBlockedPlayback(true);
|
|
ReleasePendingCapture();
|
|
|
|
for (PendingResponse& pending : m_pendingResponse)
|
|
if (pending.valid && pending.clientID == m_ownerClientID &&
|
|
pending.response.result == KVMFR_AUDIO_RESPONSE_BOUND)
|
|
pending = {};
|
|
}
|
|
}
|
|
|
|
void CLGMPAudioTransport::ResetOwner()
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
for (ClaimRecord& record : m_claimRecord)
|
|
if (record.valid && record.clientID == m_ownerClientID &&
|
|
record.requestGeneration == m_ownerGeneration &&
|
|
record.claimToken == m_ownerToken)
|
|
{
|
|
record.closed = true;
|
|
break;
|
|
}
|
|
|
|
m_ownerState = OwnerState::NONE;
|
|
m_ownerClientID = 0;
|
|
m_ownerGeneration = 0;
|
|
m_clientCapabilities = 0;
|
|
m_ownerToken = 0;
|
|
m_ownerDeadline = 0;
|
|
m_releaseGeneration = 0;
|
|
m_responseAdmitted = false;
|
|
m_clientReady = false;
|
|
m_activationIssued = false;
|
|
m_deactivationIssued = false;
|
|
m_ownerResponse = {};
|
|
m_statusDirty = false;
|
|
m_announcedPlayback = 0;
|
|
m_announcedCapture = 0;
|
|
m_hostSequence = 0;
|
|
m_nextClientSequence = 0;
|
|
m_clientSequenceKnown = false;
|
|
m_captureDiscontinuity = false;
|
|
m_pendingCapture = {};
|
|
m_ownerSerial = NextSerial(m_ownerSerial);
|
|
}
|
|
|
|
void CLGMPAudioTransport::MaintainOwner(uint64_t now)
|
|
{
|
|
if (m_ownerState == OwnerState::NONE)
|
|
return;
|
|
if (m_ownerState != OwnerState::RELEASING)
|
|
{
|
|
if (!OwnerSubscribed())
|
|
BeginRelease("audio pointer subscriber disappeared");
|
|
else if (m_pendingCapture.valid)
|
|
RenewLease();
|
|
else if (now >= m_ownerDeadline)
|
|
BeginRelease("audio owner lease expired");
|
|
}
|
|
|
|
if (m_ownerState != OwnerState::RELEASING)
|
|
return;
|
|
|
|
const bool streamsUnbound = TryUnbindStreams();
|
|
|
|
const bool inactive = !m_started || !m_activationIssued ||
|
|
(m_stateKnown && !m_state.active &&
|
|
m_state.generation != m_releaseGeneration);
|
|
if (streamsUnbound && inactive)
|
|
{
|
|
DEBUG_INFO("Audio owner %u generation %u released",
|
|
m_ownerClientID, m_ownerGeneration);
|
|
ResetOwner();
|
|
}
|
|
}
|
|
|
|
void CLGMPAudioTransport::InitializeOwner(uint32_t clientID,
|
|
const KVMFRAudioClaim& claim)
|
|
{
|
|
m_ownerState = OwnerState::BOUND;
|
|
m_ownerClientID = clientID;
|
|
m_ownerGeneration = claim.requestGeneration;
|
|
m_clientCapabilities = claim.clientCapabilities;
|
|
m_ownerToken = claim.claimToken;
|
|
m_responseAdmitted = false;
|
|
m_clientReady = false;
|
|
m_activationIssued = false;
|
|
m_deactivationIssued = false;
|
|
m_statusDirty = true;
|
|
m_announcedPlayback = 0;
|
|
m_announcedCapture = 0;
|
|
m_hostSequence = 0;
|
|
m_nextClientSequence = 0;
|
|
m_clientSequenceKnown = false;
|
|
m_captureDiscontinuity = false;
|
|
ClearBlockedPlayback(false);
|
|
m_pendingCapture = {};
|
|
m_ownerSerial = NextSerial(m_ownerSerial);
|
|
RenewLease();
|
|
}
|
|
|
|
void CLGMPAudioTransport::HandleClaim(
|
|
uint32_t clientID, const KVMFRAudioClaim& claim)
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_initialized)
|
|
return;
|
|
|
|
KVMFRAudioStreamResponse response = {};
|
|
response.magic = KVMFR_AUDIO_RESPONSE_MAGIC;
|
|
response.version = KVMFR_AUDIO_CONTROL_VERSION;
|
|
response.size = sizeof(response);
|
|
response.requestGeneration = claim.requestGeneration;
|
|
response.boundClientID = clientID;
|
|
response.endpointGeneration = m_state.generation;
|
|
response.claimToken = claim.claimToken;
|
|
|
|
ClaimRecord * claimRecord = nullptr;
|
|
ClaimRecord * claimSlot = nullptr;
|
|
for (ClaimRecord& record : m_claimRecord)
|
|
{
|
|
if (record.valid && record.clientID == clientID)
|
|
claimRecord = &record;
|
|
if (!record.valid && !claimSlot)
|
|
claimSlot = &record;
|
|
}
|
|
if (claimRecord)
|
|
claimSlot = claimRecord;
|
|
|
|
const bool claimValid = ValidateClaim(claim);
|
|
if (!claimValid)
|
|
response.result = KVMFR_AUDIO_RESPONSE_INCOMPATIBLE;
|
|
else if (m_failed || !m_started || !m_stateKnown)
|
|
response.result = KVMFR_AUDIO_RESPONSE_ERROR;
|
|
else if (m_ownerState != OwnerState::NONE)
|
|
{
|
|
if (m_ownerState != OwnerState::RELEASING &&
|
|
m_ownerClientID == clientID &&
|
|
m_ownerGeneration == claim.requestGeneration &&
|
|
m_ownerToken == claim.claimToken)
|
|
{
|
|
RenewLease();
|
|
response = m_ownerResponse;
|
|
}
|
|
else
|
|
response.result = KVMFR_AUDIO_RESPONSE_BUSY;
|
|
}
|
|
else if (claimRecord &&
|
|
claimRecord->requestGeneration == claim.requestGeneration &&
|
|
claimRecord->claimToken == claim.claimToken)
|
|
{
|
|
if (claimRecord->response.result == KVMFR_AUDIO_RESPONSE_ERROR)
|
|
response = claimRecord->response;
|
|
else
|
|
response.result = KVMFR_AUDIO_RESPONSE_BUSY;
|
|
}
|
|
else if (claimRecord && !RequestNewer(
|
|
claim.requestGeneration, claimRecord->requestGeneration))
|
|
response.result = KVMFR_AUDIO_RESPONSE_BUSY;
|
|
else if (!claimSlot)
|
|
{
|
|
DEBUG_WARN("Audio claim history is full for client %u", clientID);
|
|
response.result = KVMFR_AUDIO_RESPONSE_ERROR;
|
|
}
|
|
else if (BindStreams(clientID))
|
|
{
|
|
InitializeOwner(clientID, claim);
|
|
response.result = KVMFR_AUDIO_RESPONSE_BOUND;
|
|
response.protocolVersion = KVMFR_AUDIO_PROTOCOL_MAX;
|
|
response.hostToClient = m_hostToClientDescriptor;
|
|
response.clientToHost = m_clientToHostDescriptor;
|
|
m_ownerResponse = response;
|
|
claimSlot->valid = true;
|
|
claimSlot->closed = false;
|
|
claimSlot->clientID = clientID;
|
|
claimSlot->requestGeneration = claim.requestGeneration;
|
|
claimSlot->claimToken = claim.claimToken;
|
|
claimSlot->response = response;
|
|
DEBUG_INFO("Audio owner %u generation %u admitted",
|
|
m_ownerClientID, m_ownerGeneration);
|
|
}
|
|
else
|
|
response.result = KVMFR_AUDIO_RESPONSE_ERROR;
|
|
|
|
if (claimValid && claimSlot &&
|
|
response.result == KVMFR_AUDIO_RESPONSE_ERROR &&
|
|
(!claimRecord || RequestNewer(claim.requestGeneration,
|
|
claimRecord->requestGeneration)))
|
|
{
|
|
claimSlot->valid = true;
|
|
claimSlot->closed = true;
|
|
claimSlot->clientID = clientID;
|
|
claimSlot->requestGeneration = claim.requestGeneration;
|
|
claimSlot->claimToken = claim.claimToken;
|
|
claimSlot->response = response;
|
|
}
|
|
|
|
if (!QueueResponse(clientID, response))
|
|
{
|
|
DEBUG_WARN("Audio response queue is full for client %u", clientID);
|
|
if (response.result == KVMFR_AUDIO_RESPONSE_BOUND &&
|
|
m_ownerClientID == clientID)
|
|
BeginRelease("audio response queue exhausted");
|
|
}
|
|
PumpResponses();
|
|
}
|
|
|
|
KVMFRAudioStatus CLGMPAudioTransport::WireStatus() const
|
|
{
|
|
KVMFRAudioStatus status = {};
|
|
status.version = KVMFR_AUDIO_STATUS_VERSION;
|
|
status.size = sizeof(status);
|
|
status.protocolVersion = KVMFR_AUDIO_PROTOCOL_MAX;
|
|
status.requestGeneration = m_ownerGeneration;
|
|
status.capabilities =
|
|
m_state.capabilities & m_clientCapabilities;
|
|
status.ownerClientID = m_ownerClientID;
|
|
status.ownerGeneration = m_ownerGeneration;
|
|
status.endpointGeneration = m_state.generation;
|
|
status.playbackGeneration = m_state.playback.generation;
|
|
status.captureGeneration = m_state.capture.generation;
|
|
status.playbackState = WireState(m_state.playback.state);
|
|
status.captureState = WireState(m_state.capture.state);
|
|
if (m_state.playback.formatValid &&
|
|
ValidFormat(m_state.playback.format))
|
|
status.playbackFormat = WireFormat(m_state.playback.format);
|
|
if (m_state.capture.formatValid &&
|
|
ValidFormat(m_state.capture.format))
|
|
status.captureFormat = WireFormat(m_state.capture.format);
|
|
|
|
if (m_state.available)
|
|
status.flags |= KVMFR_AUDIO_STATUS_AVAILABLE;
|
|
if (m_ownerState != OwnerState::NONE)
|
|
status.flags |= KVMFR_AUDIO_STATUS_HAS_OWNER;
|
|
if (status.capabilities & KVMFR_AUDIO_CAP_PLAYBACK)
|
|
status.flags |= KVMFR_AUDIO_STATUS_PLAYBACK_AVAILABLE;
|
|
if (status.capabilities & KVMFR_AUDIO_CAP_CAPTURE)
|
|
status.flags |= KVMFR_AUDIO_STATUS_CAPTURE_AVAILABLE;
|
|
if ((status.capabilities & KVMFR_AUDIO_CAP_PLAYBACK) &&
|
|
m_state.available && m_state.active &&
|
|
m_state.playback.state != AudioStreamState::UNAVAILABLE &&
|
|
m_state.playback.state != AudioStreamState::STOPPED)
|
|
status.flags |= KVMFR_AUDIO_STATUS_PLAYBACK_ACTIVE;
|
|
if ((status.capabilities & KVMFR_AUDIO_CAP_CAPTURE) &&
|
|
m_state.available && m_state.active &&
|
|
m_state.capture.state != AudioStreamState::UNAVAILABLE &&
|
|
m_state.capture.state != AudioStreamState::STOPPED)
|
|
status.flags |= KVMFR_AUDIO_STATUS_CAPTURE_ACTIVE;
|
|
return status;
|
|
}
|
|
|
|
bool CLGMPAudioTransport::CommitMessage(LGMPStreamBuffer& buffer,
|
|
KVMFRAudioMessageType type, uint64_t streamGeneration,
|
|
KVMFRAudioMessageFlags flags, uint64_t position, int64_t timeNs,
|
|
uint64_t rateQ32, uint32_t frames, const void * payload,
|
|
uint32_t length)
|
|
{
|
|
const uint32_t bytes = static_cast<uint32_t>(
|
|
sizeof(KVMFRAudioMessage) + length);
|
|
if (!buffer.data || buffer.capacity < bytes)
|
|
{
|
|
const LGMP_STATUS cancel = lgmpHostStreamWriteCancel(
|
|
m_hostToClientStream, &buffer);
|
|
if (cancel != LGMP_OK)
|
|
DEBUG_WARN("Failed to cancel an undersized audio stream "
|
|
"reservation: %s", lgmpStatusString(cancel));
|
|
Fail("undersized host-to-client audio stream slot",
|
|
LGMP_ERR_INVALID_SIZE);
|
|
return false;
|
|
}
|
|
|
|
KVMFRAudioMessage message = {};
|
|
message.version = KVMFR_AUDIO_MESSAGE_VERSION;
|
|
message.size = sizeof(message);
|
|
message.type = type;
|
|
message.streamGeneration = streamGeneration;
|
|
message.flags = flags;
|
|
message.sequence = m_hostSequence;
|
|
message.position = position;
|
|
message.timeNs = timeNs;
|
|
message.rateQ32 = rateQ32;
|
|
message.frames = frames;
|
|
message.length = length;
|
|
memcpy(buffer.data, &message, sizeof(message));
|
|
if (length)
|
|
WCWrite::Copy(static_cast<uint8_t *>(buffer.data) + sizeof(message),
|
|
payload, length);
|
|
|
|
const LGMP_STATUS status = lgmpHostStreamWriteCommit(
|
|
m_hostToClientStream, &buffer, bytes);
|
|
if (status == LGMP_OK)
|
|
{
|
|
++m_hostSequence;
|
|
return true;
|
|
}
|
|
if (status == LGMP_ERR_STREAM_UNBOUND ||
|
|
status == LGMP_ERR_STREAM_STALE)
|
|
{
|
|
BeginRelease("host-to-client audio stream binding lost");
|
|
return false;
|
|
}
|
|
Fail("lgmpHostStreamWriteCommit(audio)", status);
|
|
return false;
|
|
}
|
|
|
|
bool CLGMPAudioTransport::WriteMessage(KVMFRAudioMessageType type,
|
|
uint64_t streamGeneration, KVMFRAudioMessageFlags flags,
|
|
uint64_t position, int64_t timeNs, uint64_t rateQ32,
|
|
uint32_t frames, const void * payload, uint32_t length)
|
|
{
|
|
if (m_playbackCreditValid)
|
|
return false;
|
|
|
|
LGMPStreamBuffer buffer = {};
|
|
const LGMP_STATUS status = lgmpHostStreamWriteAcquire(
|
|
m_hostToClientStream, &buffer);
|
|
if (status == LGMP_ERR_STREAM_FULL)
|
|
return false;
|
|
if (status == LGMP_ERR_STREAM_UNBOUND ||
|
|
status == LGMP_ERR_STREAM_STALE)
|
|
{
|
|
BeginRelease("host-to-client audio stream binding lost");
|
|
return false;
|
|
}
|
|
if (status != LGMP_OK)
|
|
{
|
|
Fail("lgmpHostStreamWriteAcquire(audio)", status);
|
|
return false;
|
|
}
|
|
|
|
return CommitMessage(buffer, type, streamGeneration, flags,
|
|
position, timeNs, rateQ32, frames, payload, length);
|
|
}
|
|
|
|
void CLGMPAudioTransport::PumpState()
|
|
{
|
|
if (m_ownerState != OwnerState::BOUND || !m_responseAdmitted ||
|
|
!m_clientReady || !m_stateKnown || m_failed ||
|
|
m_playbackCreditValid)
|
|
return;
|
|
|
|
const bool playbackCurrent = m_state.available && m_state.active &&
|
|
(m_clientCapabilities & KVMFR_AUDIO_CAP_PLAYBACK) &&
|
|
(m_state.capabilities & AUDIO_CAP_PLAYBACK) &&
|
|
m_state.playback.formatValid &&
|
|
ValidFormat(m_state.playback.format) &&
|
|
m_state.playback.state != AudioStreamState::UNAVAILABLE &&
|
|
m_state.playback.state != AudioStreamState::STOPPED;
|
|
if (m_announcedPlayback &&
|
|
(!playbackCurrent ||
|
|
m_announcedPlayback != m_state.playback.generation))
|
|
{
|
|
if (!WriteMessage(KVMFR_AUDIO_MESSAGE_PLAYBACK_STOP,
|
|
m_announcedPlayback, 0, 0, 0, 0, 0, nullptr, 0))
|
|
return;
|
|
m_announcedPlayback = 0;
|
|
}
|
|
|
|
const bool captureCurrent = m_state.available && m_state.active &&
|
|
(m_clientCapabilities & KVMFR_AUDIO_CAP_CAPTURE) &&
|
|
(m_state.capabilities & AUDIO_CAP_CAPTURE) &&
|
|
m_state.capture.formatValid &&
|
|
ValidFormat(m_state.capture.format) &&
|
|
m_state.capture.state != AudioStreamState::UNAVAILABLE &&
|
|
m_state.capture.state != AudioStreamState::STOPPED;
|
|
if (m_announcedCapture &&
|
|
(!captureCurrent ||
|
|
m_announcedCapture != m_state.capture.generation))
|
|
{
|
|
if (!WriteMessage(KVMFR_AUDIO_MESSAGE_CAPTURE_STOP,
|
|
m_announcedCapture, 0, 0, 0, 0, 0, nullptr, 0))
|
|
return;
|
|
m_announcedCapture = 0;
|
|
}
|
|
|
|
if (playbackCurrent &&
|
|
m_announcedPlayback != m_state.playback.generation)
|
|
{
|
|
const KVMFRAudioFormat format = WireFormat(m_state.playback.format);
|
|
if (!WriteMessage(KVMFR_AUDIO_MESSAGE_PLAYBACK_START,
|
|
m_state.playback.generation, 0, 0, 0, 0, 0,
|
|
&format, sizeof(format)))
|
|
return;
|
|
m_announcedPlayback = m_state.playback.generation;
|
|
}
|
|
|
|
if (captureCurrent &&
|
|
m_announcedCapture != m_state.capture.generation)
|
|
{
|
|
const KVMFRAudioFormat format = WireFormat(m_state.capture.format);
|
|
if (!WriteMessage(KVMFR_AUDIO_MESSAGE_CAPTURE_START,
|
|
m_state.capture.generation, 0, 0, 0, 0, 0,
|
|
&format, sizeof(format)))
|
|
return;
|
|
m_announcedCapture = m_state.capture.generation;
|
|
}
|
|
|
|
if (!m_statusDirty)
|
|
return;
|
|
const KVMFRAudioStatus status = WireStatus();
|
|
if (WriteMessage(KVMFR_AUDIO_MESSAGE_STATUS,
|
|
0, 0, 0, 0, 0, 0, &status, sizeof(status)))
|
|
m_statusDirty = false;
|
|
}
|
|
|
|
void CLGMPAudioTransport::CheckPlaybackCredit()
|
|
{
|
|
if (!m_playbackBlocked || m_playbackCreditValid ||
|
|
m_playbackReadyPending || m_statusDirty ||
|
|
m_ownerState != OwnerState::BOUND || !m_responseAdmitted ||
|
|
!m_clientReady || !m_stateKnown || !m_state.available ||
|
|
!m_state.active ||
|
|
!(m_clientCapabilities & KVMFR_AUDIO_CAP_PLAYBACK) ||
|
|
!(m_state.capabilities & AUDIO_CAP_PLAYBACK) ||
|
|
m_blockedPlayback.endpointGeneration != m_state.generation ||
|
|
m_blockedPlayback.streamGeneration !=
|
|
m_state.playback.generation ||
|
|
!m_state.playback.formatValid ||
|
|
m_state.playback.state != AudioStreamState::RUNNING ||
|
|
!SameFormat(m_blockedPlayback.format,
|
|
m_state.playback.format) ||
|
|
m_announcedPlayback != m_blockedPlayback.streamGeneration)
|
|
return;
|
|
|
|
m_playbackCredit = {};
|
|
const LGMP_STATUS status = lgmpHostStreamWriteAcquire(
|
|
m_hostToClientStream, &m_playbackCredit);
|
|
if (status == LGMP_ERR_STREAM_FULL)
|
|
return;
|
|
if (status == LGMP_ERR_STREAM_UNBOUND ||
|
|
status == LGMP_ERR_STREAM_STALE)
|
|
{
|
|
BeginRelease("host-to-client audio credit binding lost");
|
|
return;
|
|
}
|
|
if (status != LGMP_OK)
|
|
{
|
|
Fail("lgmpHostStreamWriteAcquire(audio credit)", status);
|
|
return;
|
|
}
|
|
|
|
const size_t required = sizeof(KVMFRAudioMessage) +
|
|
m_blockedPlaybackSize;
|
|
if (!m_playbackCredit.data ||
|
|
m_playbackCredit.capacity < required)
|
|
{
|
|
const LGMP_STATUS cancel = lgmpHostStreamWriteCancel(
|
|
m_hostToClientStream, &m_playbackCredit);
|
|
m_playbackCredit = {};
|
|
if (cancel != LGMP_OK)
|
|
DEBUG_WARN("Failed to cancel an undersized audio credit: %s",
|
|
lgmpStatusString(cancel));
|
|
Fail("undersized host-to-client audio stream slot",
|
|
LGMP_ERR_INVALID_SIZE);
|
|
return;
|
|
}
|
|
|
|
m_playbackCreditValid = true;
|
|
m_playbackReadyPending = true;
|
|
}
|
|
|
|
bool CLGMPAudioTransport::ParseInbound(
|
|
const LGMPStreamBuffer& buffer, KVMFRAudioMessage& message) const
|
|
{
|
|
if (!buffer.data || buffer.size < sizeof(message) ||
|
|
buffer.size > buffer.capacity)
|
|
return false;
|
|
memcpy(&message, buffer.data, sizeof(message));
|
|
if (message.version != KVMFR_AUDIO_MESSAGE_VERSION ||
|
|
message.size != sizeof(message) || message.reserved0 ||
|
|
message.length > KVMFR_AUDIO_PCM_BYTES ||
|
|
message.length >
|
|
(std::numeric_limits<uint32_t>::max)() - sizeof(message))
|
|
return false;
|
|
return buffer.size == sizeof(message) + message.length;
|
|
}
|
|
|
|
bool CLGMPAudioTransport::PendingCaptureCurrent() const
|
|
{
|
|
if (!m_pendingCapture.valid)
|
|
return false;
|
|
|
|
const AudioPacket& packet = m_pendingCapture.packet;
|
|
return m_stateKnown && m_state.available && m_state.active &&
|
|
(m_clientCapabilities & KVMFR_AUDIO_CAP_CAPTURE) &&
|
|
(m_state.capabilities & AUDIO_CAP_CAPTURE) &&
|
|
m_state.capture.formatValid &&
|
|
ValidFormat(m_state.capture.format) &&
|
|
m_state.capture.state == AudioStreamState::RUNNING &&
|
|
packet.endpointGeneration == m_state.generation &&
|
|
packet.streamGeneration == m_state.capture.generation &&
|
|
SameFormat(packet.format, m_state.capture.format);
|
|
}
|
|
|
|
bool CLGMPAudioTransport::PrepareCapture(
|
|
const KVMFRAudioMessage& message, const LGMPStreamBuffer& buffer)
|
|
{
|
|
if (!m_stateKnown || !m_state.available || !m_state.active ||
|
|
!(m_state.capabilities & AUDIO_CAP_CAPTURE) ||
|
|
!m_state.capture.formatValid ||
|
|
!ValidFormat(m_state.capture.format) ||
|
|
m_state.capture.state != AudioStreamState::RUNNING ||
|
|
message.streamGeneration != m_state.capture.generation)
|
|
return false;
|
|
|
|
const bool silent =
|
|
(message.flags & KVMFR_AUDIO_MESSAGE_SILENT) != 0;
|
|
const uint32_t bytes =
|
|
message.frames * m_state.capture.format.blockAlign;
|
|
if (bytes > KVMFR_AUDIO_PCM_BYTES ||
|
|
(silent ? message.length != 0 : message.length != bytes))
|
|
return false;
|
|
|
|
AudioPacket packet;
|
|
packet.endpointGeneration = m_state.generation;
|
|
packet.streamGeneration = message.streamGeneration;
|
|
if (message.flags & KVMFR_AUDIO_MESSAGE_DISCONTINUITY)
|
|
packet.flags |= AUDIO_PACKET_DISCONTINUITY;
|
|
if (message.flags & KVMFR_AUDIO_MESSAGE_SILENT)
|
|
packet.flags |= AUDIO_PACKET_SILENT;
|
|
if (message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_VALID)
|
|
packet.flags |= AUDIO_PACKET_CLOCK_VALID;
|
|
if (message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_STABLE)
|
|
packet.flags |= AUDIO_PACKET_CLOCK_STABLE;
|
|
if (m_captureDiscontinuity ||
|
|
(m_clientSequenceKnown &&
|
|
message.sequence != m_nextClientSequence) ||
|
|
(!m_clientSequenceKnown && message.sequence != 0))
|
|
packet.flags |= AUDIO_PACKET_DISCONTINUITY;
|
|
packet.frames = message.frames;
|
|
packet.position = message.position;
|
|
packet.timeNs = message.timeNs;
|
|
packet.rateQ32 = message.rateQ32;
|
|
packet.format = m_state.capture.format;
|
|
|
|
m_pendingCapture.valid = true;
|
|
m_pendingCapture.buffer = buffer;
|
|
m_pendingCapture.packet = packet;
|
|
m_pendingCapture.data = silent ? nullptr :
|
|
static_cast<const uint8_t *>(buffer.data) +
|
|
sizeof(KVMFRAudioMessage);
|
|
m_pendingCapture.size = message.length;
|
|
m_pendingCapture.readySerial = m_captureReadySerial;
|
|
m_nextClientSequence = message.sequence + 1;
|
|
m_clientSequenceKnown = true;
|
|
return true;
|
|
}
|
|
|
|
void CLGMPAudioTransport::DrainInbound()
|
|
{
|
|
for (unsigned count = 0; count < INBOUND_DRAIN_MAX; ++count)
|
|
{
|
|
CSRWSharedLock callbackLock(m_callbackLock);
|
|
IAudioTarget * target = nullptr;
|
|
AudioClockFeedback feedback;
|
|
bool callCapture = false;
|
|
bool callClock = false;
|
|
uint64_t ownerSerial = 0;
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (m_ownerState != OwnerState::BOUND ||
|
|
!m_responseAdmitted || m_failed)
|
|
return;
|
|
|
|
target = m_started ? m_target : nullptr;
|
|
ownerSerial = m_ownerSerial;
|
|
if (m_pendingCapture.valid)
|
|
{
|
|
if (!PendingCaptureCurrent())
|
|
{
|
|
ReleasePendingCapture();
|
|
m_captureDiscontinuity = true;
|
|
continue;
|
|
}
|
|
if (m_pendingCapture.readySerial == m_captureReadySerial)
|
|
return;
|
|
m_pendingCapture.readySerial = m_captureReadySerial;
|
|
callCapture = true;
|
|
}
|
|
else
|
|
{
|
|
LGMPStreamBuffer buffer = {};
|
|
const LGMP_STATUS status = lgmpHostStreamReadPeek(
|
|
m_clientToHostStream, &buffer);
|
|
if (status == LGMP_ERR_STREAM_EMPTY)
|
|
return;
|
|
if (status == LGMP_ERR_STREAM_UNBOUND ||
|
|
status == LGMP_ERR_STREAM_STALE)
|
|
{
|
|
BeginRelease("client-to-host audio stream binding lost");
|
|
return;
|
|
}
|
|
if (status != LGMP_OK)
|
|
{
|
|
Fail("lgmpHostStreamReadPeek(audio)", status);
|
|
return;
|
|
}
|
|
|
|
KVMFRAudioMessage message = {};
|
|
if (!ParseInbound(buffer, message))
|
|
{
|
|
const LGMP_STATUS release = lgmpHostStreamReadRelease(
|
|
m_clientToHostStream, &buffer);
|
|
if (release != LGMP_OK)
|
|
Fail("lgmpHostStreamReadRelease(audio invalid)", release);
|
|
BeginRelease("malformed client-to-host audio record");
|
|
return;
|
|
}
|
|
|
|
const bool sequenceGap =
|
|
(m_clientSequenceKnown &&
|
|
message.sequence != m_nextClientSequence) ||
|
|
(!m_clientSequenceKnown && message.sequence != 0);
|
|
const auto consume = [&]() -> bool
|
|
{
|
|
const LGMP_STATUS release = lgmpHostStreamReadRelease(
|
|
m_clientToHostStream, &buffer);
|
|
if (release != LGMP_OK)
|
|
{
|
|
Fail("lgmpHostStreamReadRelease(audio)", release);
|
|
return false;
|
|
}
|
|
m_nextClientSequence = message.sequence + 1;
|
|
m_clientSequenceKnown = true;
|
|
return true;
|
|
};
|
|
|
|
if (!m_clientReady &&
|
|
message.type != KVMFR_AUDIO_MESSAGE_KEEPALIVE &&
|
|
message.type != KVMFR_AUDIO_MESSAGE_RELEASE)
|
|
{
|
|
if (!consume())
|
|
return;
|
|
BeginRelease("audio data received before client readiness");
|
|
return;
|
|
}
|
|
|
|
switch (message.type)
|
|
{
|
|
case KVMFR_AUDIO_MESSAGE_CAPTURE_DATA:
|
|
{
|
|
const bool clockStable =
|
|
(message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_STABLE) != 0;
|
|
const bool clockValid =
|
|
(message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_VALID) != 0;
|
|
if (!(m_clientCapabilities & KVMFR_AUDIO_CAP_CAPTURE) ||
|
|
(message.flags & ~WIRE_PACKET_FLAG_MASK) ||
|
|
(clockStable && !clockValid) ||
|
|
(!clockValid && (message.position || message.timeNs ||
|
|
message.rateQ32)) || !message.streamGeneration ||
|
|
!message.frames ||
|
|
message.frames > KVMFR_AUDIO_MAX_FRAMES_PER_PACKET)
|
|
{
|
|
consume();
|
|
BeginRelease("invalid capture audio record");
|
|
return;
|
|
}
|
|
RenewLease();
|
|
|
|
const bool captureCurrent = m_stateKnown &&
|
|
m_state.available && m_state.active &&
|
|
(m_state.capabilities & AUDIO_CAP_CAPTURE) &&
|
|
m_state.capture.formatValid &&
|
|
ValidFormat(m_state.capture.format) &&
|
|
m_state.capture.state == AudioStreamState::RUNNING &&
|
|
message.streamGeneration ==
|
|
m_state.capture.generation;
|
|
if (captureCurrent)
|
|
{
|
|
const bool silent = (message.flags &
|
|
KVMFR_AUDIO_MESSAGE_SILENT) != 0;
|
|
const uint32_t bytes = message.frames *
|
|
m_state.capture.format.blockAlign;
|
|
if (bytes > KVMFR_AUDIO_PCM_BYTES ||
|
|
(silent ? message.length != 0 :
|
|
message.length != bytes))
|
|
{
|
|
consume();
|
|
BeginRelease("invalid capture audio payload");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (!PrepareCapture(message, buffer))
|
|
{
|
|
consume();
|
|
m_captureDiscontinuity = true;
|
|
continue;
|
|
}
|
|
if (sequenceGap)
|
|
m_pendingCapture.packet.flags |=
|
|
AUDIO_PACKET_DISCONTINUITY;
|
|
callCapture = true;
|
|
break;
|
|
}
|
|
|
|
case KVMFR_AUDIO_MESSAGE_CLOCK_FEEDBACK:
|
|
{
|
|
const uint32_t validFlags =
|
|
KVMFR_AUDIO_MESSAGE_CLOCK_VALID |
|
|
KVMFR_AUDIO_MESSAGE_CLOCK_STABLE |
|
|
KVMFR_AUDIO_MESSAGE_DISCONTINUITY;
|
|
KVMFRAudioClockFeedback wire = {};
|
|
if (message.length == sizeof(wire))
|
|
memcpy(&wire, static_cast<const uint8_t *>(buffer.data) +
|
|
sizeof(message), sizeof(wire));
|
|
const bool valid =
|
|
(m_clientCapabilities &
|
|
KVMFR_AUDIO_CAP_CLOCK_FEEDBACK) &&
|
|
message.flags && !(message.flags & ~validFlags) &&
|
|
(message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_VALID) &&
|
|
(!(message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_STABLE) ||
|
|
(message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_VALID)) &&
|
|
message.streamGeneration && !message.frames &&
|
|
message.length == sizeof(wire) && !wire.reserved &&
|
|
wire.targetRateQ32;
|
|
if (!valid)
|
|
{
|
|
consume();
|
|
BeginRelease("invalid audio clock feedback");
|
|
return;
|
|
}
|
|
|
|
const bool current = m_stateKnown && m_state.available &&
|
|
m_state.active && (m_state.capabilities &
|
|
AUDIO_CAP_CLOCK_FEEDBACK) &&
|
|
message.streamGeneration ==
|
|
m_state.playback.generation;
|
|
if (!consume())
|
|
return;
|
|
RenewLease();
|
|
if (sequenceGap)
|
|
m_captureDiscontinuity = true;
|
|
if (!current)
|
|
continue;
|
|
feedback.endpointGeneration = m_state.generation;
|
|
feedback.playbackGeneration = message.streamGeneration;
|
|
feedback.position = message.position;
|
|
feedback.timeNs = message.timeNs;
|
|
feedback.rateQ32 = message.rateQ32;
|
|
feedback.targetRateQ32 = wire.targetRateQ32;
|
|
feedback.flags = AUDIO_CLOCK_VALID;
|
|
if (message.flags & KVMFR_AUDIO_MESSAGE_CLOCK_STABLE)
|
|
feedback.flags |= AUDIO_CLOCK_STABLE;
|
|
if (sequenceGap ||
|
|
(message.flags &
|
|
KVMFR_AUDIO_MESSAGE_DISCONTINUITY))
|
|
feedback.flags |= AUDIO_CLOCK_DISCONTINUITY;
|
|
callClock = true;
|
|
break;
|
|
}
|
|
|
|
case KVMFR_AUDIO_MESSAGE_KEEPALIVE:
|
|
case KVMFR_AUDIO_MESSAGE_RELEASE:
|
|
{
|
|
const bool empty = !message.streamGeneration &&
|
|
!message.flags && !message.position && !message.timeNs &&
|
|
!message.rateQ32 && !message.frames && !message.length;
|
|
if (!consume())
|
|
return;
|
|
if (!empty)
|
|
{
|
|
BeginRelease("invalid audio owner control record");
|
|
return;
|
|
}
|
|
if (message.type == KVMFR_AUDIO_MESSAGE_RELEASE)
|
|
{
|
|
BeginRelease("client audio release");
|
|
return;
|
|
}
|
|
if (!m_clientReady)
|
|
{
|
|
if (sequenceGap)
|
|
{
|
|
BeginRelease("invalid initial audio keepalive sequence");
|
|
return;
|
|
}
|
|
m_clientReady = true;
|
|
DEBUG_INFO("Audio owner %u generation %u is ready",
|
|
m_ownerClientID, m_ownerGeneration);
|
|
}
|
|
if (sequenceGap)
|
|
m_captureDiscontinuity = true;
|
|
RenewLease();
|
|
continue;
|
|
}
|
|
|
|
default:
|
|
consume();
|
|
BeginRelease("unsupported client-to-host audio record");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
AudioResult result = AudioResult::UNAVAILABLE;
|
|
if (target && callCapture)
|
|
result = target->SendCapture(m_pendingCapture.packet,
|
|
m_pendingCapture.data, m_pendingCapture.size);
|
|
else if (target && callClock)
|
|
result = target->SetClockFeedback(feedback);
|
|
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (ownerSerial != m_ownerSerial ||
|
|
m_ownerState != OwnerState::BOUND)
|
|
return;
|
|
if (callClock)
|
|
{
|
|
if (result == AudioResult::FAILED)
|
|
BeginRelease("audio clock target failed");
|
|
continue;
|
|
}
|
|
if (!callCapture || !m_pendingCapture.valid)
|
|
continue;
|
|
if (!PendingCaptureCurrent())
|
|
{
|
|
ReleasePendingCapture();
|
|
m_captureDiscontinuity = true;
|
|
continue;
|
|
}
|
|
if (result == AudioResult::BUSY)
|
|
return;
|
|
|
|
const LGMP_STATUS release = lgmpHostStreamReadRelease(
|
|
m_clientToHostStream, &m_pendingCapture.buffer);
|
|
if (release != LGMP_OK)
|
|
{
|
|
m_pendingCapture = {};
|
|
Fail("lgmpHostStreamReadRelease(audio capture)", release);
|
|
return;
|
|
}
|
|
m_pendingCapture = {};
|
|
m_captureDiscontinuity = result != AudioResult::ACCEPTED;
|
|
if (result == AudioResult::FAILED ||
|
|
result == AudioResult::REJECTED)
|
|
{
|
|
BeginRelease("audio capture target failed");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void CLGMPAudioTransport::ProcessActivation()
|
|
{
|
|
CSRWSharedLock callbackLock(m_callbackLock);
|
|
IAudioTarget * target = nullptr;
|
|
bool activate = false;
|
|
uint64_t ownerSerial = 0;
|
|
{
|
|
CSRWSharedLock lock(m_lock);
|
|
if (!m_started || !m_target || m_failed ||
|
|
m_ownerState == OwnerState::NONE)
|
|
return;
|
|
if (m_ownerState == OwnerState::BOUND &&
|
|
m_responseAdmitted && m_clientReady &&
|
|
!m_activationIssued)
|
|
activate = true;
|
|
else if (m_ownerState != OwnerState::RELEASING ||
|
|
!m_activationIssued || m_deactivationIssued)
|
|
return;
|
|
target = m_target;
|
|
ownerSerial = m_ownerSerial;
|
|
}
|
|
|
|
const AudioResult result = target->SetAudioActive(activate);
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (ownerSerial != m_ownerSerial ||
|
|
m_ownerState == OwnerState::NONE)
|
|
return;
|
|
if (activate)
|
|
{
|
|
if (m_ownerState != OwnerState::BOUND || m_activationIssued)
|
|
return;
|
|
if (result == AudioResult::ACCEPTED)
|
|
m_activationIssued = true;
|
|
else if (result == AudioResult::FAILED ||
|
|
result == AudioResult::REJECTED)
|
|
BeginRelease("audio endpoint activation failed");
|
|
}
|
|
else if (m_ownerState == OwnerState::RELEASING &&
|
|
(result == AudioResult::ACCEPTED ||
|
|
result == AudioResult::UNAVAILABLE ||
|
|
result == AudioResult::STALE))
|
|
m_deactivationIssued = true;
|
|
}
|
|
|
|
void CLGMPAudioTransport::NotifyPlaybackReady()
|
|
{
|
|
CSRWSharedLock callbackLock(m_callbackLock);
|
|
IAudioTarget * target = nullptr;
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_playbackReadyPending)
|
|
return;
|
|
m_playbackReadyPending = false;
|
|
if (m_started)
|
|
target = m_target;
|
|
}
|
|
if (target)
|
|
target->PlaybackReceiveReady();
|
|
}
|
|
|
|
void CLGMPAudioTransport::NotifyFailure()
|
|
{
|
|
CSRWSharedLock callbackLock(m_callbackLock);
|
|
IAudioTarget * target = nullptr;
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_failed || m_failureNotified)
|
|
return;
|
|
m_failureNotified = true;
|
|
if (m_started)
|
|
target = m_target;
|
|
}
|
|
if (target)
|
|
target->AudioFailed();
|
|
}
|
|
|
|
void CLGMPAudioTransport::Fail(
|
|
const char * operation, LGMP_STATUS status)
|
|
{
|
|
if (!m_failed)
|
|
DEBUG_ERROR("%s Failed (Audio): %s",
|
|
operation, lgmpStatusString(status));
|
|
ClearBlockedPlayback(true);
|
|
m_failed = true;
|
|
}
|
|
|
|
void CLGMPAudioTransport::Process()
|
|
{
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_initialized)
|
|
return;
|
|
PumpResponses();
|
|
}
|
|
|
|
DrainInbound();
|
|
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
MaintainOwner(GetTickCount64());
|
|
PumpResponses();
|
|
PumpState();
|
|
CheckPlaybackCredit();
|
|
}
|
|
ProcessActivation();
|
|
NotifyPlaybackReady();
|
|
NotifyFailure();
|
|
}
|
|
|
|
bool CLGMPAudioTransport::Start(IAudioTarget& target)
|
|
{
|
|
CSRWExclusiveLock lifecycleLock(m_lifecycleLock);
|
|
CSRWExclusiveLock callbackLock(m_callbackLock);
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_initialized || m_failed)
|
|
return false;
|
|
if (m_started)
|
|
return m_target == ⌖
|
|
m_target = ⌖
|
|
m_started = true;
|
|
m_stateKnown = false;
|
|
m_failureNotified = false;
|
|
return true;
|
|
}
|
|
|
|
void CLGMPAudioTransport::Stop()
|
|
{
|
|
CSRWExclusiveLock lifecycleLock(m_lifecycleLock);
|
|
CSRWExclusiveLock callbackLock(m_callbackLock);
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_started && !m_target)
|
|
return;
|
|
if (m_ownerState != OwnerState::NONE)
|
|
BeginRelease("audio source stopped");
|
|
else
|
|
ClearBlockedPlayback(false);
|
|
m_started = false;
|
|
m_target = nullptr;
|
|
m_playbackReadyPending = false;
|
|
}
|
|
|
|
void CLGMPAudioTransport::TransportStop()
|
|
{
|
|
CSRWExclusiveLock lifecycleLock(m_lifecycleLock);
|
|
CSRWExclusiveLock callbackLock(m_callbackLock);
|
|
CSRWExclusiveLock lock(m_lock);
|
|
m_started = false;
|
|
m_target = nullptr;
|
|
m_playbackReadyPending = false;
|
|
ClearBlockedPlayback(false);
|
|
ReleasePendingCapture();
|
|
ForceUnbindStreams();
|
|
ResetOwner();
|
|
for (PendingResponse& response : m_pendingResponse)
|
|
response = {};
|
|
for (ClaimRecord& record : m_claimRecord)
|
|
record = {};
|
|
}
|
|
|
|
void CLGMPAudioTransport::AudioState(
|
|
const AudioEndpointStatus& state)
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (!m_started)
|
|
return;
|
|
|
|
if (m_playbackBlocked)
|
|
{
|
|
const bool playbackCurrent = state.available && state.active &&
|
|
(m_clientCapabilities & KVMFR_AUDIO_CAP_PLAYBACK) &&
|
|
(state.capabilities & AUDIO_CAP_PLAYBACK) &&
|
|
state.playback.formatValid &&
|
|
ValidFormat(state.playback.format) &&
|
|
state.playback.state == AudioStreamState::RUNNING &&
|
|
state.generation == m_blockedPlayback.endpointGeneration &&
|
|
state.playback.generation ==
|
|
m_blockedPlayback.streamGeneration &&
|
|
SameFormat(state.playback.format, m_blockedPlayback.format);
|
|
if (!playbackCurrent)
|
|
ClearBlockedPlayback(true);
|
|
}
|
|
|
|
m_state = state;
|
|
m_stateKnown = true;
|
|
if (m_ownerState == OwnerState::BOUND && m_responseAdmitted)
|
|
m_statusDirty = true;
|
|
}
|
|
|
|
AudioResult CLGMPAudioTransport::SendPlayback(
|
|
const AudioPacket& packet, const uint8_t * data, size_t size)
|
|
{
|
|
if ((packet.flags & ~AUDIO_PACKET_FLAG_MASK) ||
|
|
((packet.flags & AUDIO_PACKET_CLOCK_STABLE) &&
|
|
!(packet.flags & AUDIO_PACKET_CLOCK_VALID)) ||
|
|
!packet.frames ||
|
|
packet.frames > AUDIO_MAX_FRAMES_PER_PACKET ||
|
|
!ValidFormat(packet.format))
|
|
return AudioResult::REJECTED;
|
|
|
|
const size_t pcmBytes = static_cast<size_t>(packet.frames) *
|
|
packet.format.blockAlign;
|
|
const bool silent = (packet.flags & AUDIO_PACKET_SILENT) != 0;
|
|
if (pcmBytes > AUDIO_MAX_PCM_BYTES ||
|
|
(silent ? size != 0 : (size != pcmBytes || !data)))
|
|
return AudioResult::REJECTED;
|
|
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (m_playbackBlocked &&
|
|
(size != m_blockedPlaybackSize ||
|
|
!SamePacket(packet, m_blockedPlayback)))
|
|
{
|
|
DEBUG_WARN("Audio playback retry did not match the retained packet");
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::REJECTED;
|
|
}
|
|
if (!m_started)
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::UNAVAILABLE;
|
|
}
|
|
if (m_failed)
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::FAILED;
|
|
}
|
|
if (m_ownerState != OwnerState::BOUND ||
|
|
!(m_clientCapabilities & KVMFR_AUDIO_CAP_PLAYBACK))
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::ACCEPTED;
|
|
}
|
|
if (!m_responseAdmitted || !m_clientReady || !m_stateKnown)
|
|
{
|
|
if (!RememberBlockedPlayback(packet, size))
|
|
return AudioResult::REJECTED;
|
|
return AudioResult::BUSY;
|
|
}
|
|
if (!m_state.available || !m_state.active)
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::UNAVAILABLE;
|
|
}
|
|
if (packet.endpointGeneration != m_state.generation ||
|
|
packet.streamGeneration != m_state.playback.generation)
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::STALE;
|
|
}
|
|
if (!(m_state.capabilities & AUDIO_CAP_PLAYBACK) ||
|
|
!m_state.playback.formatValid ||
|
|
m_state.playback.state != AudioStreamState::RUNNING ||
|
|
!SameFormat(packet.format, m_state.playback.format))
|
|
{
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::UNAVAILABLE;
|
|
}
|
|
|
|
KVMFRAudioMessageFlags flags = 0;
|
|
if (packet.flags & AUDIO_PACKET_DISCONTINUITY)
|
|
flags |= KVMFR_AUDIO_MESSAGE_DISCONTINUITY;
|
|
if (packet.flags & AUDIO_PACKET_SILENT)
|
|
flags |= KVMFR_AUDIO_MESSAGE_SILENT;
|
|
if (packet.flags & AUDIO_PACKET_CLOCK_VALID)
|
|
flags |= KVMFR_AUDIO_MESSAGE_CLOCK_VALID;
|
|
if (packet.flags & AUDIO_PACKET_CLOCK_STABLE)
|
|
flags |= KVMFR_AUDIO_MESSAGE_CLOCK_STABLE;
|
|
|
|
if (m_playbackCreditValid)
|
|
{
|
|
LGMPStreamBuffer buffer = m_playbackCredit;
|
|
m_playbackCredit = {};
|
|
m_playbackCreditValid = false;
|
|
const bool committed = CommitMessage(buffer,
|
|
KVMFR_AUDIO_MESSAGE_PLAYBACK_DATA, packet.streamGeneration,
|
|
flags, packet.position, packet.timeNs, packet.rateQ32,
|
|
packet.frames, data, static_cast<uint32_t>(size));
|
|
ClearBlockedPlayback(false);
|
|
if (committed)
|
|
return AudioResult::ACCEPTED;
|
|
if (m_failed)
|
|
return AudioResult::FAILED;
|
|
return m_ownerState == OwnerState::BOUND ?
|
|
AudioResult::BUSY : AudioResult::ACCEPTED;
|
|
}
|
|
|
|
PumpState();
|
|
if (m_failed)
|
|
return AudioResult::FAILED;
|
|
if (m_ownerState != OwnerState::BOUND)
|
|
return AudioResult::ACCEPTED;
|
|
if (m_statusDirty ||
|
|
m_announcedPlayback != packet.streamGeneration)
|
|
{
|
|
if (!RememberBlockedPlayback(packet, size))
|
|
return AudioResult::REJECTED;
|
|
return AudioResult::BUSY;
|
|
}
|
|
|
|
if (!WriteMessage(KVMFR_AUDIO_MESSAGE_PLAYBACK_DATA,
|
|
packet.streamGeneration, flags, packet.position, packet.timeNs,
|
|
packet.rateQ32, packet.frames, data, static_cast<uint32_t>(size)))
|
|
{
|
|
if (m_failed)
|
|
return AudioResult::FAILED;
|
|
if (m_ownerState != OwnerState::BOUND)
|
|
return AudioResult::ACCEPTED;
|
|
if (!RememberBlockedPlayback(packet, size))
|
|
return AudioResult::REJECTED;
|
|
return AudioResult::BUSY;
|
|
}
|
|
ClearBlockedPlayback(false);
|
|
return AudioResult::ACCEPTED;
|
|
}
|
|
|
|
void CLGMPAudioTransport::CaptureReceiveReady()
|
|
{
|
|
CSRWExclusiveLock lock(m_lock);
|
|
if (m_started)
|
|
m_captureReadySerial = NextSerial(m_captureReadySerial);
|
|
}
|