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330 lines
18 KiB
330 lines
18 KiB
#include "call_video_engine.h" |
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#include "call_video_encoder.h" |
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#include "call_video_decoder.h" |
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#include "call_video_cadence.h" |
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#include "call_camera_capture.h" |
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#include "../../../src/call/call_video_port.h" |
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#include "../../../src/call/call_video_playout.h" |
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#include "../../../src/call/call_audio.h" |
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#include "debug_config.h" |
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#include "mem.h" |
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#include <thread> |
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#include <mutex> |
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#include <condition_variable> |
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#include <atomic> |
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#include <deque> |
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#include <chrono> |
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namespace { |
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int64_t nowUs() { return call_video_playout_now_us(); } |
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} |
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struct CallVideoEngine::Impl { |
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std::mutex lock; |
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std::condition_variable wake; |
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uint64_t wakeSerial = 0; |
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std::thread tx, rx; |
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std::atomic<bool> running{false}; |
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uint64_t id = 0, revision = 1; |
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bool enabled = false; |
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int width = 640, height = 480, codec = 0; |
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int64_t pts = -1; |
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int64_t clockCorrection = 0; |
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QImage capturedImage; |
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QByteArray cameraId; |
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bool captureActive = false; |
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uint64_t captured = 0; |
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QImage shown; |
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int64_t shownPts = -1; |
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uint64_t publicationEpoch = 0; |
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bool publicationPending = false; |
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int64_t shownAt = 0; |
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int64_t previewReportAt = 0, previewMaxUs = 0; |
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unsigned previewFrames = 0; |
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QString status; |
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bool statusDirty = false; |
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void report(const QString& text) { |
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std::lock_guard<std::mutex> guard(lock); status = text; statusDirty = true; |
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DEBUG_INFO(DEBUG_CATEGORY_CALL, "desktop video: %s", qPrintable(text)); |
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} |
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#ifdef HAVE_STREAM_CAPTURE |
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std::unique_ptr<CallCameraCapture> capture; |
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#endif |
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}; |
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CallVideoEngine::CallVideoEngine(QObject* parent) : QObject(parent), m(std::make_unique<Impl>()) { |
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m_timer.setInterval(20); |
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m_timer.setTimerType(Qt::PreciseTimer); |
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connect(&m_timer, &QTimer::timeout, this, [this] { |
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QString status; bool report = false; |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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if (m->statusDirty) { status = m->status; m->statusDirty = false; report = true; } } |
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if (report) emit statusChanged(status); |
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}); |
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#ifdef HAVE_STREAM_CAPTURE |
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m->capture = std::make_unique<CallCameraCapture>(); |
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connect(m->capture.get(), &CallCameraCapture::devicesChanged, this, &CallVideoEngine::camerasChanged); |
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connect(m->capture.get(), &CallCameraCapture::failed, this, [this](const QString& error) { |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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m->enabled = false; ++m->revision; ++m->wakeSerial; m->capturedImage = {}; m->pts = -1; } |
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m->captureActive = false; m->wake.notify_one(); emit localImageChanged({}); |
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m->report(error); emit statusChanged(error); |
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}); |
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connect(m->capture.get(), &CallCameraCapture::frameReady, this, [this](const QImage& image, qint64 pts, qint64 correction) { |
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const int64_t now = nowUs(); |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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if (!m->running || !m->enabled || pts <= m->pts) return; |
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m->capturedImage = image; m->pts = pts; m->clockCorrection = correction; ++m->captured; ++m->wakeSerial; } |
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m->wake.notify_one(); |
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emit localImageChanged(image.scaled(320, 240, Qt::KeepAspectRatio, Qt::FastTransformation)); |
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++m->previewFrames; m->previewMaxUs = std::max(m->previewMaxUs, nowUs() - now); |
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if (now - m->previewReportAt >= 1000000) { |
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DEBUG_DEBUG(DEBUG_CATEGORY_CALL, "video local preview call=%llu frames=%u update_max_us=%lld capture_age_us=%lld", |
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(unsigned long long)m->id, m->previewFrames, (long long)m->previewMaxUs, (long long)(now - pts)); |
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m->previewReportAt = now; m->previewFrames = 0; m->previewMaxUs = 0; |
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} |
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}); |
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#endif |
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} |
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CallVideoEngine::~CallVideoEngine() { stop(); } |
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// В GUI одновременно не больше одного уведомления; при паузе UI остаётся последний выбранный кадр. |
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void CallVideoEngine::publishImage(const QImage& image, int64_t pts) { |
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uint64_t epoch; |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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m->shown = image; m->shownPts = pts; m->shownAt = nowUs(); |
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if (m->publicationPending) return; |
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m->publicationPending = true; epoch = m->publicationEpoch; } |
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QMetaObject::invokeMethod(this, [this, epoch] { |
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QImage image; int64_t pts, selected; |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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if (epoch != m->publicationEpoch) return; |
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image = m->shown; pts = m->shownPts; selected = m->shownAt; m->publicationPending = false; } |
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emit imageChanged(image); |
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if (!image.isNull() && pts >= 0 && pts % 1000000 < 34000) |
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DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "video timing stage=publish call=%llu pts=%lld mono_us=%lld ui_wait_us=%lld", |
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(unsigned long long)m->id, (long long)pts, (long long)nowUs(), (long long)(nowUs() - selected)); |
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}, Qt::QueuedConnection); |
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} |
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void CallVideoEngine::start(quint64 id) { |
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if (m->running && m->id == id) return; |
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stop(); m->id = id; m->running = true; m_timer.start(); |
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try { m->tx = std::thread(&CallVideoEngine::transmit, this); m->rx = std::thread(&CallVideoEngine::receive, this); } |
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catch (const std::exception& error) { DEBUG_ERROR(DEBUG_CATEGORY_CALL, "video worker start: %s", error.what()); stop(); emit statusChanged(error.what()); } |
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} |
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void CallVideoEngine::closeCamera() { |
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#ifdef HAVE_STREAM_CAPTURE |
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if (m->captureActive) m->capture->configure(false, m->cameraId, m->width, m->height); |
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#endif |
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m->captureActive = false; |
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{ std::lock_guard<std::mutex> guard(m->lock); m->capturedImage = {}; m->pts = -1; ++m->wakeSerial; } |
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m->wake.notify_one(); emit localImageChanged({}); |
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} |
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void CallVideoEngine::stop() { |
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m->running = false; m_timer.stop(); closeCamera(); |
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if (m->tx.joinable()) m->tx.join(); |
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if (m->rx.joinable()) m->rx.join(); |
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if (m->id) call_video_port_close(m->id); |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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++m->publicationEpoch; m->publicationPending = false; m->shown = {}; m->shownPts = -1; } |
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m->id = 0; m->enabled = false; emit imageChanged({}); |
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} |
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void CallVideoEngine::setVideo(bool enabled, const QByteArray& cameraId, int width, int height, int codec) { |
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const bool active = enabled && m->running; |
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const bool captureChanged = active != m->captureActive || cameraId != m->cameraId || width != m->width || height != m->height; |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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if (m->enabled == enabled && cameraId == m->cameraId && width == m->width && height == m->height && codec == m->codec |
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&& !captureChanged) return; |
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m->enabled = enabled; m->width = width; m->height = height; m->codec = codec; ++m->revision; ++m->wakeSerial; |
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if (captureChanged) { m->capturedImage = {}; m->pts = -1; } } |
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m->cameraId = cameraId; m->captureActive = active; m->wake.notify_one(); |
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if (!captureChanged) return; |
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emit localImageChanged({}); |
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#ifdef HAVE_STREAM_CAPTURE |
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m->capture->configure(active, cameraId, width, height); |
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#else |
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if (active) m->report(tr("Video capture is unavailable in this build")); |
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#endif |
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} |
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void CallVideoEngine::transmit() { |
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call_video_caps caps = CallVideoDecoder::capabilities(); |
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// Не связываем приём с наличием собственного encoder. |
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for (unsigned codec = 1; codec <= 2 && m->running; ++codec) { |
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call_video_format probe{1, 1280, 720, 30, 0, (uint8_t)codec, (uint8_t)(codec == 1 ? 31 : 93), 4000000, |
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(uint8_t)(codec == 1 ? CALL_VIDEO_CONSTRAINED_BASELINE : CALL_VIDEO_MAIN)}; |
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CallVideoEncoder encoder; |
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if (encoder.open(probe, 1000000)) { |
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call_video_limit limit{1280, 720, 30, 1280 * 720 * 30, 4000000, probe.profile, probe.level}; |
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caps.encode[codec - 1] = limit; |
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} else DEBUG_WARN(DEBUG_CATEGORY_CALL, "call codec probe unavailable codec=%u: %s", codec, qPrintable(encoder.error())); |
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} |
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if (!m->running) return; |
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if (call_video_port_open(m->id, &caps) < 0) { m->report(tr("Video transport is unavailable")); return; } |
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CallVideoEncoder encoder; |
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call_video_format format{}; |
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uint64_t appliedRevision = 0, keySerial = 0, request = 0, frameId = 0; |
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uint64_t userRevision = 0, rejectedGeneration = 0; |
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unsigned excluded = 0; |
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int64_t lastPts = -1; |
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bool forceKey = true; |
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int64_t reportAt = nowUs(), encodeMax = 0; |
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uint64_t captureBase = 0; |
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unsigned encodedCount = 0, keyCount = 0, sendBusy = 0, paced = 0; |
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CallVideoCadence cadence; |
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uint64_t wakeSerial = 0; |
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auto idle = [this, &wakeSerial] { |
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std::unique_lock<std::mutex> guard(m->lock); |
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m->wake.wait_for(guard, std::chrono::milliseconds(5), [&] { return !m->running || m->wakeSerial != wakeSerial; }); |
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}; |
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while (m->running) { |
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struct call_video_port_status state{}; |
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if (call_video_port_status(m->id, &state) < 0) break; |
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if (state.error) { m->report(tr("Core rejected video format")); break; } |
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uint64_t revision, captured; bool enabled; int width, height, codec; int64_t pts, clockCorrection; |
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QImage image; |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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revision = m->revision; enabled = m->enabled; width = m->width; height = m->height; codec = m->codec; pts = m->pts; |
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captured = m->captured; |
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clockCorrection = m->clockCorrection; image = m->capturedImage; wakeSerial = m->wakeSerial; |
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} |
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int64_t now = nowUs(); |
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if (now - reportAt >= 1000000) { |
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DEBUG_DEBUG(DEBUG_CATEGORY_CALL, |
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"video capture flow call=%llu interval_us=%lld captured=%llu encoded=%u keys=%u send_busy=%u paced=%u " |
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"encode_max_us=%lld capture_age_us=%lld pts=%lld clock_correction_us=%lld", |
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(unsigned long long)m->id, (long long)(now - reportAt), (unsigned long long)(captured - captureBase), |
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encodedCount, keyCount, sendBusy, paced, (long long)encodeMax, |
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(long long)(pts >= 0 ? now - pts : 0), (long long)pts, (long long)clockCorrection); |
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reportAt = now; captureBase = captured; encodedCount = keyCount = sendBusy = paced = 0; encodeMax = 0; |
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} |
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if (revision != userRevision) { userRevision = revision; excluded = 0; } |
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if (format.generation && state.decoded_generation == format.generation && !state.decoded_accepted |
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&& rejectedGeneration != format.generation) { |
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rejectedGeneration = format.generation; excluded |= 1u << format.codec; |
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if (!codec) { appliedRevision = 0; m->report(tr("Receiver rejected video; selecting fallback")); } |
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else { |
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m->report(tr("Receiver cannot decode selected codec")); |
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std::lock_guard<std::mutex> guard(m->lock); m->enabled = false; continue; |
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} |
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} |
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if (format.generation && state.have_peer && !call_video_format_supported(&caps, &state.peer, &format)) appliedRevision = 0; |
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if (!enabled || !state.have_peer || pts <= lastPts) { idle(); continue; } |
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if (revision != appliedRevision) { |
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call_video_format next{format.generation + 1, (uint16_t)width, (uint16_t)height, 30, 0, (uint8_t)codec, 0, 4000000, 0}; |
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bool opened = false; |
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uint32_t minimum = state.minimum_bps ? state.minimum_bps : 300000; |
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uint32_t maximum = state.maximum_bps ? state.maximum_bps : 4000000; |
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uint32_t initialRate = std::max(minimum, std::min(maximum, encoder.bitrate() ? encoder.bitrate() : 1000000)); |
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for (int candidate = 2; candidate >= 1; --candidate) { |
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if ((codec && codec != candidate) || (excluded & (1u << candidate))) continue; |
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next.codec = candidate; next.level = next.profile = 0; |
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if (call_video_choose(&caps, &state.peer, &next) > 0 && encoder.open(next, initialRate)) { opened = true; break; } |
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} |
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if (!opened) { |
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m->report(tr("Selected video mode is unavailable to the peer")); |
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std::lock_guard<std::mutex> guard(m->lock); if (m->revision == revision) m->enabled = false; |
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continue; |
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} |
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format = next; appliedRevision = revision; forceKey = true; request = 0; |
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if (call_video_port_format(m->id, &format, encoder.bitrate()) < 0) break; |
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m->report(QString("%1 · %2×%3 · %4 kbit/s").arg(format.codec == 2 ? "H.265" : "H.264").arg(width).arg(height).arg(encoder.bitrate() / 1000)); |
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} |
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if (state.configured_generation != format.generation) { idle(); continue; } |
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if (state.key_serial != keySerial) { keySerial = state.key_serial; forceKey = true; } |
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if (state.rate_generation == format.generation && state.rate_request > request) { |
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request = state.rate_request; |
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if (!encoder.requestBitrate(format.generation, request, state.rate_bps)) |
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call_video_port_applied(m->id, format.generation, request, 0); |
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} |
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#ifdef HAVE_STREAM_CAPTURE |
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if (!cadence.accept(pts)) { lastPts = pts; ++paced; idle(); continue; } |
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if (image.isNull() || nowUs() - pts > CallCameraMaxFrameAgeUs) { |
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DEBUG_WARN(DEBUG_CATEGORY_CALL, "video TX skips old capture age_us=%lld", (long long)(nowUs() - pts)); |
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lastPts = pts; continue; |
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} |
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LiveEncodedFrame output; CallVideoRateCompletion completion; |
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int64_t encodeStarted = nowUs(); |
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bool encoded = encoder.encode(image, pts, forceKey, output, completion); lastPts = pts; |
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encodeMax = std::max(encodeMax, nowUs() - encodeStarted); |
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if (completion.request) { |
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call_video_port_applied(m->id, completion.generation, completion.request, completion.bitrate); |
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m->report(QString("%1 · %2×%3 · %4 kbit/s").arg(format.codec == 2 ? "H.265" : "H.264") |
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.arg(format.width).arg(format.height).arg(encoder.bitrate() / 1000)); |
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} |
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if (!encoded) { forceKey = true; m->report(encoder.error()); continue; } |
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++encodedCount; if (output.key) ++keyCount; |
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call_video_frame packet{}; |
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packet.call_id = m->id; packet.frame_id = ++frameId; packet.pts_us = pts; packet.format = format; |
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packet.size = packet.length = output.data.size(); packet.data = reinterpret_cast<const uint8_t*>(output.data.constData()); |
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packet.flags = output.key ? CALL_VIDEO_KEY : 0; |
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{ std::lock_guard<std::mutex> guard(m->lock); |
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if (!m->running || !m->enabled || m->revision != revision || nowUs() - pts > CallCameraMaxFrameAgeUs) { |
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DEBUG_WARN(DEBUG_CATEGORY_CALL, "video TX discards obsolete encoded frame revision=%llu/%llu enabled=%d age_us=%lld", |
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(unsigned long long)revision, (unsigned long long)m->revision, m->enabled, (long long)(nowUs() - pts)); |
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forceKey = true; continue; |
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} |
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forceKey = call_video_port_send(&packet) != 1; } |
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// Одинаковое окно исходного PTS на всех этапах: примерно один кадр в секунду, без трассы каждого кадра. |
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if (pts % 1000000 < 34000) |
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DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, |
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"video timing stage=encode call=%llu frame=%llu pts=%lld mono_us=%lld encode_us=%lld accepted=%d", |
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(unsigned long long)m->id, (unsigned long long)frameId, (long long)pts, (long long)nowUs(), |
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(long long)(nowUs() - encodeStarted), !forceKey); |
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if (forceKey) ++sendBusy; |
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#else |
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idle(); |
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#endif |
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} |
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} |
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void CallVideoEngine::receive() { |
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struct Picture { call_video_playout_frame timing; QImage image; }; |
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std::deque<Picture> pictures; |
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CallVideoDecoder decoder; |
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call_video_playout playout; call_video_playout_init(&playout, m->id); |
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int64_t lastPictureAt = 0; |
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uint64_t reportedGeneration = 0, rejectedGeneration = 0; |
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while (m->running) { |
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// Один кадр ждёт своего срока, второй позволяет пропустить устаревший показ после паузы CPU. |
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while (pictures.size() < 2 && m->running) { |
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call_video_frame packet{}; |
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if (call_video_port_pull(m->id, &packet) == 1) { |
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if (packet.format.generation == rejectedGeneration) { u_free((void*)packet.data); continue; } |
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QImage image; |
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const int64_t decodeStarted = nowUs(); |
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if (decoder.decode(packet, image)) { |
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pictures.push_back({{packet.pts_us, packet.received_us}, image}); |
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if (packet.pts_us % 1000000 < 34000) |
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DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, |
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"video timing stage=decode call=%llu frame=%llu pts=%lld mono_us=%lld decode_us=%lld queue=%zu", |
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(unsigned long long)m->id, (unsigned long long)packet.frame_id, (long long)packet.pts_us, |
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(long long)nowUs(), (long long)(nowUs() - decodeStarted), pictures.size()); |
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if (reportedGeneration != packet.format.generation) { |
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reportedGeneration = packet.format.generation; call_video_port_decoded(m->id, reportedGeneration, 1); |
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} |
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} else { |
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rejectedGeneration = packet.format.generation; call_video_port_decoded(m->id, rejectedGeneration, 0); |
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} |
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u_free((void*)packet.data); |
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} else break; |
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} |
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int64_t now = nowUs(); call_clock_snapshot clock{}; |
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call_audio_get_clock(m->id, now, &clock); |
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auto action = call_video_playout_poll(&playout, pictures.empty() ? nullptr : &pictures.front().timing, |
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pictures.size() > 1 ? &pictures[1].timing : nullptr, now, clock.valid, clock.pts_us); |
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if (action != CALL_VIDEO_PLAYOUT_WAIT) { |
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if (action == CALL_VIDEO_PLAYOUT_SHOW) { |
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const auto& f = pictures.front(); publishImage(f.image, f.timing.pts_us); lastPictureAt = now; |
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if (f.timing.pts_us % 1000000 < 34000) |
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DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "video timing stage=select call=%llu pts=%lld mono_us=%lld audio_pts=%lld", |
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(unsigned long long)m->id, (long long)f.timing.pts_us, (long long)now, (long long)clock.pts_us); |
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} |
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pictures.pop_front(); |
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continue; |
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} |
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// VIDEO_OFF пока отсутствует в протоколе: убираем застывшую картинку после прекращения показа. |
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if (lastPictureAt && now - lastPictureAt >= 5000000) { |
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publishImage({}, -1); lastPictureAt = 0; |
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DEBUG_INFO(DEBUG_CATEGORY_CALL, "video playback hidden: no playable frame for 5s"); |
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} |
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std::this_thread::sleep_for(std::chrono::microseconds(std::max<int64_t>(100, std::min<int64_t>(5000, playout.deadline_us - nowUs())))); |
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} |
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}
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