Files
scene-actor-extraction/src/main.cpp
T
dtourolle a5ee3c05ce feat(benchmark): per-node cost and bottleneck attribution for a run
--benchmark <path> reports cumulative CPU and wall time per node and
names the node pacing the run. The pacing node is located from sampled
channel occupancy, not from time-in-node: backpressure inflates
time-in-node for everything downstream of the real bottleneck, so the
obvious measure names the victim rather than the cause.

Sampling starts with the network and stops before it is destroyed.
Channel fill is instantaneous and everything has drained by shutdown, so
a single read at the end reports an idle pipeline however congested it
was.

kill -USR1 dumps the table from a running or wedged process. Channel
occupancy identifies a stalled node -- full input, empty output --
without a debug build or a debugger, which is the difference between
diagnosing the AR-004 hang in seconds and reproducing it under gdb.

Two knobs this exposes for measurement rather than sets: SAE_CV_THREADS,
because OpenCV's TBB arena and KPN's thread-per-node are two schedulers
unaware of each other on the same cores; and SAE_CUDA_BLOCKING_SYNC,
because the default spin-wait held the embedder thread at 99.7% user
time while nvidia-powerd cut the GPU's clock from 1005 to 210 MHz.
Neither default changes until a measurement says it should.

TRACES: VR-015 | PR-004
2026-08-05 14:38:15 +02:00

588 lines
32 KiB
C++

// scene_analyze — identify actors in a movie using a KPN pipeline
//
// TRACES: DP-001, DP-002 | PR-004
// One analysis core; the CLI is a front-end over it and must not fork pipeline
// logic. Other deployment modes (DP-003, DP-004) wrap this same core.
//
// KPN topology (release build):
//
// [frame_source] ──Frame──► [face_detector] ──SceneFrame──► [face_aligner]
// ──AlignedSceneFrame──► [embedder] ──EmbeddedSceneFrame──►
// [identity_matcher] ──MatchedSceneFrame──► [scene_tracker]
// ──SceneAnnotation──► [result_sink]
//
// Debug build (SAE_DEBUG=1):
// [identity_matcher] output fans out to both [scene_tracker] AND [debug_renderer].
// FanoutNode<MatchedSceneFrame, 2> is auto-inserted by make_network().
//
// Usage:
// scene_analyze --movie <path> --gallery <gallery.json> [options]
//
// Options:
// --output <path> output JSON (default: annotations.json)
// --fps <N> sample rate in frames/sec (default: 1.0)
// --verbosity <0|1|2> 0=minimal, 1=standard, 2=jellyfin-xray (default: 0)
// --match-threshold <f> cosine dist threshold (default: 0.45)
// --extinction <f> actor extinction window in seconds (default: 5.0)
// --detector <path> override SCRFD detector model path
// --arcface <path> override ArcFace model path
// --scene-detect enable TransNetV2 shot-boundary detection (dense decode;
// writes <output>.scenes.json). Off by default.
// --scene-detector <path> override TransNetV2 .onnx model path
// --scene-detector-engine <path> pre-built TransNetV2 TRT engine (TRT backend)
// --scene-threshold <f> boundary sigmoid prob above this → cut (default: 0.60)
// --scene-stride <N> frames between TransNetV2 windows (default: 50, ≤100)
// --scene-decode-fps <f> dense decode rate in scene-detect mode (default: 0 =
// native, the only rate TransNetV2 is calibrated for;
// AR-011). Lowering it runs the model off-distribution.
// --dense-scale <f> downscale decoded frames in scene-detect mode (0<f≤1,
// default 1=off). Speeds decode; keep ≥0.5 on 1080p.
// --max-faces <N> max faces kept per frame (default: 10)
// --expand-gallery enable per-film gallery expansion from track continuity
// --expand-buffer <N> per-track diversity buffer size (default: 20)
// --expand-band-lo <p> store admission floor, P(same person) (default: 0.90)
// --expand-band-hi <p> store admission ceiling, P(same person) (default: 0.95)
// --expand-min-anchor <N> accepted frames before a track confirms (default: 3)
// --expand-debug-dir <p> dump promoted mugshots + embeddings here (SAE_DEBUG)
// --benchmark <path> write a per-node timing + bottleneck report (JSON) and
// print it at shutdown. Says where the run's time went
// and which node is pacing it. See src/benchmark.hpp.
// --benchmark-interval-ms <N> channel-occupancy sampling period (default: 100)
// (SAE_DEBUG only)
// --debug-dir <path> debug frames output dir (default: debug_frames)
// --crop-context <f> bbox expansion factor for context crops (default: 1.5)
#include "benchmark.hpp"
#include "config.hpp"
#include "types.hpp"
#include "gallery/embedder_stamp.hpp"
#include "gallery/gallery_store.hpp"
#include "nodes/frame_source_node.hpp"
#include "nodes/camera_position_change_detector_node.hpp"
#include "nodes/face_detector_node.hpp"
#include "nodes/face_aligner_node.hpp"
#include "nodes/embedder_node.hpp"
#include "nodes/face_tracker_node.hpp"
#include "nodes/identity_matcher_node.hpp"
#include "nodes/scene_tracker_node.hpp"
#include "nodes/scene_detector_node.hpp"
#include "scene_boundaries.hpp"
#include "nodes/scene_boundary_annotator_node.hpp"
#include "nodes/result_sink_node.hpp"
#include "nodes/embedding_dump_node.hpp"
#ifdef SAE_DEBUG
#include "nodes/debug_renderer_node.hpp"
#endif
#include <kpn/kpn.hpp>
#include <opencv2/core/utility.hpp> // cv::setNumThreads (SAE_CV_THREADS)
#include <atomic>
#include <chrono>
#include <csignal>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <map>
#include <mutex>
#include <stdexcept>
#include <string>
#include <string_view>
#include <thread>
// ── CLI parsing ───────────────────────────────────────────────────────────────
/// TRACES: AR-010, AR-004 | SR-002
/// How deeply the sampled branch is buffered behind the dense one. TransNetV2
/// needs kWindow (100) dense frames before it can score any of them, so the face
/// branch must lag by at least that much or it asks about frames nobody has
/// looked at yet. Backpressure turns depth into lag: the fanout blocks on the
/// slower branch rather than dropping, so the detector simply runs ahead.
static constexpr std::size_t kSceneJoinDepth = 256;
/// Set when the scene branch is built, so shutdown can report whether the join
/// actually worked.
static std::shared_ptr<SceneBoundaries> scene_stats;
/// TRACES: VR-015, AR-004 | PR-004
/// Set by SIGUSR1, serviced by the wait loop. `kill -USR1 <pid>` on a running
/// or WEDGED run prints the benchmark table immediately — channel occupancy
/// names the stalled node (full input, empty output) without a debug build or a
/// debugger, which is the difference between diagnosing the AR-004 hang in
/// seconds and reproducing it under gdb.
///
/// The handler only stores a flag; all printing happens on the main thread,
/// since nothing in the report is async-signal-safe.
static std::atomic<bool> g_dump_request{false};
extern "C" void sae_on_dump_signal(int) {
g_dump_request.store(true, std::memory_order_relaxed);
}
static Config parse_args(int argc, char** argv) {
Config cfg;
cfg.detector_model = kDefaultDetectorModel;
cfg.arcface_model = kDefaultArcfaceModel;
cfg.scene_model = kDefaultSceneModel;
cfg.output_path = "annotations.json";
for (int i = 1; i < argc; ++i) {
auto arg = [&](const char* flag) { return std::strcmp(argv[i], flag) == 0; };
auto next = [&]() -> std::string {
if (++i >= argc) throw std::runtime_error(std::string("missing arg after ") + argv[i-1]);
return argv[i];
};
if (arg("--movie")) cfg.movie_path = next();
else if (arg("--gallery")) cfg.gallery_path = next();
else if (arg("--output")) cfg.output_path = next();
else if (arg("--dump-embeddings")) cfg.dump_embeddings_path = next();
else if (arg("--benchmark")) cfg.benchmark_path = next();
else if (arg("--benchmark-interval-ms")) cfg.benchmark_interval_ms = std::stoi(next());
else if (arg("--fps")) cfg.sample_fps = std::stof(next());
else if (arg("--max-decode-fps")) cfg.max_decode_fps = std::stof(next());
else if (arg("--start")) cfg.start_sec = std::stod(next());
else if (arg("--end")) cfg.end_sec = std::stod(next());
else if (arg("--cut-threshold")) cfg.cut_threshold = std::stof(next());
else if (arg("--scene-detect")) cfg.scene_detect = true;
else if (arg("--scene-detector")) cfg.scene_model = next();
else if (arg("--scene-detector-engine")) cfg.scene_engine = next();
else if (arg("--scene-threshold")) cfg.scene_threshold = std::stof(next());
else if (arg("--scene-stride")) cfg.scene_stride = std::stoi(next());
else if (arg("--scene-decode-fps")) cfg.scene_decode_fps = std::stof(next());
else if (arg("--dense-scale")) cfg.dense_scale = std::stof(next());
else if (arg("--verbosity")) { int v = std::stoi(next()); cfg.verbosity = v == 2 ? Verbosity::xray : v == 1 ? Verbosity::standard : Verbosity::minimal; }
else if (arg("--prior")) cfg.match_prior = std::stof(next());
else if (arg("--prob-threshold")) cfg.prob_threshold = std::stof(next());
else if (arg("--match-threshold")) cfg.match_threshold = std::stof(next());
else if (arg("--extinction")) cfg.extinction_sec = std::stod(next());
else if (arg("--detector")) cfg.detector_model = next();
else if (arg("--detector-engine")) cfg.detector_engine = next();
else if (arg("--arcface")) cfg.arcface_model = next();
else if (arg("--require-gallery-stamp")) cfg.require_gallery_stamp = true;
else if (arg("--arcface-engine")) cfg.arcface_engine = next();
else if (arg("--conf")) cfg.detector_conf = std::stof(next());
else if (arg("--max-faces")) cfg.max_faces = std::stoi(next());
else if (arg("--min-face-px")) cfg.min_face_px = std::stof(next());
else if (arg("--ratio")) cfg.match_ratio = std::stof(next());
else if (arg("--ratio-ceil")) cfg.match_ratio_ceil = std::stof(next());
else if (arg("--track-alpha")) cfg.track_alpha = std::stof(next());
else if (arg("--track-min-iou")) cfg.track_min_iou = std::stof(next());
else if (arg("--track-min-prob")) cfg.track_assoc_min_prob = std::stof(next());
else if (arg("--track-extinction")) cfg.track_extinction_sec = std::stod(next());
else if (arg("--anneal")) cfg.anneal_sec = std::stod(next());
else if (arg("--expand-gallery")) cfg.expand_gallery = true;
else if (arg("--expand-buffer")) cfg.expand_buffer_size = std::stoi(next());
else if (arg("--expand-band-lo")) cfg.expand_band_lo = std::stof(next());
else if (arg("--expand-band-hi")) cfg.expand_band_hi = std::stof(next());
else if (arg("--expand-min-anchor")) cfg.expand_min_anchor_frames = std::stoi(next());
else if (arg("--expand-debug-dir")) cfg.expand_debug_dir = next();
else if (arg("--trt-cache")) cfg.trt.cache_dir = next();
else if (arg("--trt-fp16")) cfg.trt.fp16 = true;
else if (arg("--no-trt-fp16")) cfg.trt.fp16 = false;
else if (arg("--trt-int8")) cfg.trt.int8 = true;
else if (arg("--embed-batch")) cfg.embed_batch_size = std::stoi(next());
#ifdef SAE_DEBUG
else if (arg("--debug-dir")) cfg.debug_dir = next();
else if (arg("--crop-context")) cfg.crop_context = std::stof(next());
#endif
else {
std::cerr << "[warn] unknown flag: " << argv[i] << "\n";
}
}
if (cfg.movie_path.empty()) throw std::runtime_error("--movie is required");
if (cfg.gallery_path.empty()) throw std::runtime_error("--gallery is required");
return cfg;
}
// ── Main ──────────────────────────────────────────────────────────────────────
int main(int argc, char** argv) {
/// TRACES: VR-015 | PR-004
// OpenCV here is built against TBB, so cv::parallel_for_ opens an arena of
// nproc-1 workers (19 on a 20-core box) *on top of* KPN's one thread per
// node. Two schedulers, neither aware of the other, on the same cores.
//
// SAE_CV_THREADS=1 hands concurrency entirely to KPN, which is where this
// pipeline's parallelism is supposed to come from. Worth measuring rather
// than assuming: TBB fan-out inside warpAffine is free speed when the
// pipeline is otherwise idle, so this can cut either way. Unset = default.
if (const char* t = std::getenv("SAE_CV_THREADS")) {
const int n = std::atoi(t);
cv::setNumThreads(n);
std::cerr << "[opencv] cv::setNumThreads(" << n << ")\n";
}
Config cfg;
try {
cfg = parse_args(argc, argv);
} catch (const std::exception& e) {
std::cerr << "Usage error: " << e.what() << "\n";
return 1;
}
// Load actor gallery
ActorGallery gallery;
try {
gallery = load_gallery(cfg.gallery_path);
/// TRACES: GR-004 | SR-001
// Hard startup error before a single frame is decoded: a gallery built
// with another embedder yields plausible-looking, meaningless matches.
verify_gallery_embedder(gallery, cfg.gallery_path, cfg.arcface_model,
cfg.require_gallery_stamp);
} catch (const std::exception& e) {
std::cerr << "Gallery error: " << e.what() << "\n";
return 1;
}
std::cerr << "[main] gallery loaded: " << gallery.actors.size() << " actors\n";
// ── Construct node functors ───────────────────────────────────────────────
std::atomic<bool> done{false}; // set by result_sink (face branch)
std::atomic<bool> scene_done{true}; // set by scene_detector; true when disabled
FrameSourceFunc source_fn {cfg};
CameraPositionChangeDetectorFunc campos_fn {cfg};
FaceDetectorFunc detector_fn{cfg};
FaceAlignerFunc aligner_fn;
EmbedderFunc embedder_fn{cfg};
// Constructed before the tracker: it fits (or loads) the calibration, and
// the tracker must decide in that same probability space (AR-024).
IdentityMatcherFunc matcher_fn {gallery, cfg};
/// TRACES: AR-007, AR-008, AR-012, AR-024 | SR-002
// The registry is created here and shared, not owned by a node: track state
// is not a stage in the stream, it is state several stages read and write,
// and its final answer is only known when a track dies.
auto same_person = same_person_probability(matcher_fn.calibration());
TrackRegistry::Config reg_cfg;
reg_cfg.extinction_sec = cfg.track_extinction_sec;
auto registry = std::make_shared<TrackRegistry>(
reg_cfg, EvidenceDiscounter(same_person));
matcher_fn.set_registry(registry);
FaceTrackerFunc ftracker_fn{cfg, registry, same_person};
SceneTrackerFunc tracker_fn {cfg};
ResultSinkFunc sink_fn {cfg, done};
/// TRACES: AR-012, AR-016 | IR-002, IR-003 | SR-002
// A reaped track goes straight to the aggregator, so the registry holds only
// live tracks and its size is bounded by concurrent on-screen faces rather
// than growing with the film.
registry->on_track_dead([&sink_fn](const DeadTrack& d) { sink_fn.add_claim(d); });
// AR-016: a film ends with faces on screen and those tracks have not timed
// out. Without this flush the closing scene's cast is silently never
// emitted — a loss that reads as a recognition miss, not a bookkeeping bug.
/// TRACES: VR-015 | PR-004
// Last timestamp the pipeline reached, latched on the way out. It is what
// turns wall-clock seconds into the number that matters — seconds of film
// per second of run — and the sink is the only node that knows it.
std::atomic<double> film_sec{0.0};
sink_fn.set_pre_write_hook([registry, &film_sec](double last_ts) {
film_sec.store(last_ts, std::memory_order_release);
registry->flush(last_ts);
});
#ifdef SAE_DEBUG
DebugRendererFunc debug_fn {cfg};
#endif
// ── Wrap in KPN ObjectNodes ───────────────────────────────────────────────
// Queue sizes tuned to the pipeline's speed profile:
// embedder (16ms) is the slowest GPU node — buffer before it must be largest
// to prevent face_aligner pool overflows and frame drops.
kpn::ObjectNode<FrameSourceFunc, kpn::in<>, kpn::out<"raw">, "frame_source", 0> source (source_fn, 32);
kpn::ObjectNode<CameraPositionChangeDetectorFunc, kpn::in<"raw">, kpn::out<"frame">, "camera_pos", 0> campos (campos_fn, 32);
kpn::ObjectNode<FaceDetectorFunc, kpn::in<"frame">, kpn::out<"scene">, "face_detector", 0> detector (detector_fn, 64);
kpn::ObjectNode<FaceAlignerFunc, kpn::in<"scene">, kpn::out<"aligned">, "face_aligner", 0> aligner (aligner_fn, 64);
kpn::ObjectNode<EmbedderFunc, kpn::in<"aligned">, kpn::out<"embedded">, "embedder", 0> embedder (embedder_fn, 32);
kpn::ObjectNode<FaceTrackerFunc, kpn::in<"embedded">, kpn::out<"tracked">, "face_tracker", 0> ftracker (ftracker_fn, 16);
kpn::ObjectNode<IdentityMatcherFunc, kpn::in<"tracked">, kpn::out<"matched">, "identity_matcher", 0> matcher (matcher_fn, 16);
kpn::ObjectNode<SceneTrackerFunc, kpn::in<"matched">, kpn::out<"annotation">, "scene_tracker", 0> tracker (tracker_fn, 16);
kpn::ObjectNode<ResultSinkFunc, kpn::in<"annotation">,kpn::out<>, "result_sink", 0> sink (sink_fn, 16);
// ── Pipeline observability + run loop (topology-agnostic) ──────────────────
// Factored into a lambda so the two topologies (with/without the scene-detect
// branch) share identical event handling, wait loop, and teardown. Any
// make_network result type binds to `Net&&`.
std::mutex event_mtx;
std::map<std::string, long> overflow_counts;
std::atomic<bool> node_crashed{false};
auto run_net = [&](auto&& net) -> int {
// Tally per-node channel overflow, and treat any non-result_sink Closed
// event as a crash so the wait loop below can't hang on `done` forever.
net.set_event_handler(
[&](std::string_view node_name, kpn::NodeEvent ev,
std::chrono::steady_clock::time_point) {
if (ev == kpn::NodeEvent::Overflow) {
std::lock_guard<std::mutex> lk(event_mtx);
++overflow_counts[std::string(node_name)];
} else { // NodeEvent::Closed
if (node_name == "result_sink" && done.load(std::memory_order_acquire))
return;
std::cerr << "[main] node '" << node_name
<< "' stopped unexpectedly — aborting pipeline\n";
node_crashed.store(true, std::memory_order_release);
}
});
// Report *why* a node died. A Closed event alone says only that one
// stopped; the exception it carried is what identifies the fault, and
// without this listener it is discarded at the node boundary. Returning
// false keeps the existing semantics — the node still stops and the
// Closed handler above still aborts the run — but the run now names the
// cause instead of leaving it to be reconstructed from a debugger.
net.set_error_handler(
[&](std::string_view node_name, std::exception_ptr eptr) {
std::string what = "unknown exception";
try {
if (eptr) std::rethrow_exception(eptr);
} catch (const std::exception& e) {
what = e.what();
} catch (...) {
}
std::lock_guard<std::mutex> lk(event_mtx);
std::cerr << "[main] node '" << node_name << "' threw: " << what << "\n";
return false;
});
/// TRACES: VR-015 | PR-004
// Sampling must start with the network and stop before it is destroyed:
// channel fill is instantaneous, and by the time a run ends everything
// has drained, so a single read at shutdown reports an idle pipeline no
// matter how congested it was.
sae::bench::BenchmarkRecorder bench{cfg.benchmark_interval_ms};
const bool benchmarking = !cfg.benchmark_path.empty();
std::cerr << "[main] starting pipeline…\n";
net.start();
if (benchmarking) {
bench.start([&net] { return net.network_snapshot(); });
std::signal(SIGUSR1, sae_on_dump_signal);
std::cerr << "[benchmark] sampling every " << cfg.benchmark_interval_ms
<< "ms — `kill -USR1 " << getpid()
<< "` to dump the table now (works while hung)\n";
}
// Wait until BOTH terminal branches finish: result_sink (face pipeline)
// and, when enabled, scene_detector (the dense TransNetV2 branch, which
// runs much slower and must not be torn down mid-stream). scene_done is
// pre-set true when scene detection is disabled.
while ((!done.load(std::memory_order_acquire) ||
!scene_done.load(std::memory_order_acquire)) &&
!node_crashed.load(std::memory_order_acquire)) {
std::this_thread::sleep_for(std::chrono::milliseconds(100));
/// TRACES: VR-015, AR-004 | PR-004
if (g_dump_request.exchange(false, std::memory_order_relaxed))
bench.dump_live(std::cerr, film_sec.load(std::memory_order_acquire));
}
// Latch the counters before stop(): they stay readable afterwards, but
// only while the network object is alive, and this keeps the numbers
// describing the run rather than the teardown.
if (benchmarking) bench.stop();
net.stop();
net.print_diagnostics();
/// TRACES: VR-015 | PR-004
if (benchmarking && bench.has_data()) {
const double film = film_sec.load(std::memory_order_acquire);
bench.print(std::cerr, film);
nlohmann::json run_cfg{
{"movie", cfg.movie_path},
{"gallery", cfg.gallery_path},
{"gallery_actors", gallery.actors.size()},
{"sample_fps", cfg.sample_fps},
{"min_face_px", cfg.min_face_px},
{"max_faces", cfg.max_faces},
{"embed_batch", cfg.embed_batch_size},
{"expand_gallery", cfg.expand_gallery},
{"scene_detect", cfg.scene_detect},
{"detector_engine", cfg.detector_engine},
{"arcface_engine", cfg.arcface_engine},
{"detector_model", cfg.detector_model},
{"arcface_model", cfg.arcface_model},
};
std::ofstream bf(cfg.benchmark_path);
if (bf) {
bf << bench.to_json(run_cfg, film).dump(2) << "\n";
std::cerr << "[benchmark] wrote " << cfg.benchmark_path << "\n";
} else {
std::cerr << "[benchmark] ERROR: could not write "
<< cfg.benchmark_path << "\n";
}
}
/// TRACES: AR-004 | SR-002
// A dropped frame does not degrade a result, it silently changes one —
// the output is a claim about footage that was never analysed, and
// nothing in the file says so. Since AR-004 made data pushes block, a
// drop can no longer happen on the data path, so any drop here means
// either that fix regressed (it lives in the KPN submodule, one line,
// easy to lose in an update) or a channel was disabled mid-run.
//
// Reporting it in a footer and exiting 0 made both invisible: the run
// "succeeded" and the truth file looked complete. Fail instead.
/// TRACES: AR-010 | SR-002
if (scene_stats) {
std::cerr << "[scene_annotate] boundaries=" << scene_stats->count()
<< " scored_through=" << scene_stats->scored_through() << "s";
// The tail is expected: frames after the detector's last full
// window are never covered, and no amount of buffering changes
// that. They are counted rather than silently treated as
// boundary-free, which is the distinction that matters.
if (scene_stats->outran() > 0)
std::cerr << " unscored=" << scene_stats->outran()
<< " frame(s) past the detector's last window — treated as"
" boundary-free, which is unverified rather than known";
std::cerr << "\n";
}
bool dropped = false;
{
std::lock_guard<std::mutex> lk(event_mtx);
if (!overflow_counts.empty()) {
dropped = true;
std::cerr << "[main] ERROR: frames were dropped (channel overflow):\n";
for (const auto& [name, count] : overflow_counts)
std::cerr << " " << name << ": " << count << "\n";
std::cerr << "[main] The output would describe footage that was never "
"analysed. Refusing to report success.\n";
}
}
if (node_crashed.load(std::memory_order_acquire)) return 1;
return dropped ? 2 : 0;
};
// ── Build static network and run ──────────────────────────────────────────
// Common face-analysis chain (campos → … → sink) is identical in all cases;
// the scene-detect branch and the debug fanout are spliced on conditionally.
// Topology:
// plain: source → campos → detector → … → sink
// scene-detect: source ─┬→ campos → decimate(filter) → detector → … → sink
// └→ scene_detector (TransNetV2 sink → scenes.json)
// The fanout after `source` is auto-inserted by make_network when its output
// feeds two edges. In dense mode campos still sees native-rate frames (so it
// detects angle changes correctly); a FilterNode then thins to sample_fps
// before face detection.
#ifdef SAE_DEBUG
kpn::ObjectNode<DebugRendererFunc, kpn::in<"matched">, kpn::out<>, "debug_renderer", 1> debug_node(debug_fn, 16);
#define SAE_DEBUG_EDGE , kpn::edge(matcher.output<"matched">(), debug_node.input<"matched">())
#else
#define SAE_DEBUG_EDGE
#endif
int rc = 0;
if (!cfg.dump_embeddings_path.empty()) {
// Dump-only topology: run the expensive front half and tee the embedder
// output to an HDF5 dump for offline sweep replay (sae_kpn). Downstream
// matching is skipped — the sweep re-runs it from the dump.
EmbeddingDumpFunc dump_fn{cfg, done};
kpn::ObjectNode<EmbeddingDumpFunc, kpn::in<"embedded">, kpn::out<>, "embedding_dump", 0>
dump_node(dump_fn, 32);
auto net = kpn::make_network(
kpn::edge(source.output<"raw">(), campos.input<"raw">()),
kpn::edge(campos.output<"frame">(), detector.input<"frame">()),
kpn::edge(detector.output<"scene">(), aligner.input<"scene">()),
kpn::edge(aligner.output<"aligned">(), embedder.input<"aligned">()),
kpn::edge(embedder.output<"embedded">(), dump_node.input<"embedded">())
);
return run_net(std::move(net));
}
if (cfg.scene_detect) {
scene_done.store(false, std::memory_order_release); // now a real terminal branch
SceneDetectorFunc scene_fn{cfg, scene_done};
/// TRACES: AR-010 | SR-002
// The join of the decode butterfly. source fans out to the dense
// TransNetV2 branch and the sampled face branch; boundaries found on the
// first have to reach the second, and cannot ride the frames because the
// branches run in parallel.
//
// TransNetV2 buffers kWindow frames before it can score any of them, so
// the face branch must lag by at least that much or it will ask about
// frames nobody has looked at yet. Channel depth is what creates the lag:
// with backpressure (AR-004) the fanout blocks on the slower branch, so
// a deep face-branch channel lets the detector run ahead by its window
// rather than dropping anything.
auto boundaries = std::make_shared<SceneBoundaries>();
scene_fn.set_boundaries(boundaries);
kpn::ObjectNode<SceneDetectorFunc, kpn::in<"dense">, kpn::out<>, "scene_detector", 0>
scene_node(scene_fn, 128);
// Decimator: keep frames on the sample_fps cadence, drop the rest.
// eof always passes so downstream shuts down cleanly. Stateful — one
// instance, mutable via shared_ptr so the std::function stays copyable.
auto decim_state = std::make_shared<double>(-1e18);
const double interval = 1.0 / cfg.sample_fps;
auto decimate = kpn::make_filter<Frame>(
[decim_state, interval](const Frame& f) {
if (f.eof) return true;
if (f.timestamp_sec - *decim_state >= interval - 1e-6) {
*decim_state = f.timestamp_sec;
return true;
}
return false;
}, kSceneJoinDepth);
/// TRACES: AR-010 | SR-002
// Stamp is_scene_boundary from the detector's published verdict. tol is
// half a sample interval: the two branches sample at different rates, so
// a boundary found on a dense frame rarely lands exactly on a sampled
// one, and half an interval attributes it to the nearest sampled frame
// and no further.
//
// outran() counts frames that arrived before the detector had scored
// them. Nonzero means the join depth is too shallow for the window, and
// those frames were annotated from an incomplete verdict — which would
// otherwise look exactly like "no boundary here".
SceneBoundaryAnnotatorFunc annotate_fn{boundaries, 0.5 / cfg.sample_fps};
kpn::ObjectNode<SceneBoundaryAnnotatorFunc, kpn::in<"frame">, kpn::out<"frame">,
"scene_annotate", 0> annotate(annotate_fn, kSceneJoinDepth);
// Reported at shutdown: without this the join is unverifiable, and an
// annotator that never fired looks identical to footage with no
// boundaries.
scene_stats = boundaries;
auto net = kpn::make_network(
kpn::edge(source.output<"raw">(), campos.input<"raw">()),
kpn::edge(source.output<"raw">(), scene_node.input<"dense">()),
kpn::edge(campos.output<"frame">(), decimate.input<0>()),
kpn::edge(decimate.output<0>(), annotate.input<"frame">()),
kpn::edge(annotate.output<"frame">(), detector.input<"frame">()),
kpn::edge(detector.output<"scene">(), aligner.input<"scene">()),
kpn::edge(aligner.output<"aligned">(), embedder.input<"aligned">()),
kpn::edge(embedder.output<"embedded">(), ftracker.input<"embedded">()),
kpn::edge(ftracker.output<"tracked">(), matcher.input<"tracked">()),
kpn::edge(matcher.output<"matched">(), tracker.input<"matched">()),
kpn::edge(tracker.output<"annotation">(), sink.input<"annotation">())
SAE_DEBUG_EDGE
);
rc = run_net(std::move(net));
} else {
auto net = kpn::make_network(
kpn::edge(source.output<"raw">(), campos.input<"raw">()),
kpn::edge(campos.output<"frame">(), detector.input<"frame">()),
kpn::edge(detector.output<"scene">(), aligner.input<"scene">()),
kpn::edge(aligner.output<"aligned">(), embedder.input<"aligned">()),
kpn::edge(embedder.output<"embedded">(), ftracker.input<"embedded">()),
kpn::edge(ftracker.output<"tracked">(), matcher.input<"tracked">()),
kpn::edge(matcher.output<"matched">(), tracker.input<"matched">()),
kpn::edge(tracker.output<"annotation">(), sink.input<"annotation">())
SAE_DEBUG_EDGE
);
rc = run_net(std::move(net));
}
#undef SAE_DEBUG_EDGE
return rc;
}