JohannesItten
ca682eaf0a
- NodeBase, Signal, FlowDef, V210 shared headers - testpattern node: SMPTE 75% color bars writer at 25fps - fakesink node: non-blocking MXL reader with per-second stats - studio-manager: FlowGraph data model, graph-driven fork/exec launcher - mxl pinned as submodule at 0ae1dc5 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
#include <string>
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#include <mxl/flow.h>
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#include <mxl/time.h>
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#include "NodeBase.hpp"
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#include "FlowDef.hpp"
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#include "V210.hpp"
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class TestPatternNode : public dmf::NodeBase {
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void run() override {
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const auto flow_info = config().at("flow_id");
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const auto flow_id = flow_info.at("id").get<std::string>();
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const int width = flow_info.value("width", 1920);
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const int height = flow_info.value("height", 1080);
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const int fps_num = flow_info.value("fps_num", 25);
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const int fps_den = flow_info.value("fps_den", 1);
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log("flow=%s %dx%d @ %d/%d fps", flow_id.c_str(), width, height, fps_num, fps_den);
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const std::string flow_def =
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dmf::make_video_flow_def(flow_id, node_id(), width, height, fps_num, fps_den);
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mxlFlowWriter writer{};
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mxlFlowConfigInfo cfg_info{};
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bool created = false;
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mxlStatus st = mxlCreateFlowWriter(
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instance(), flow_def.c_str(), nullptr, &writer, &cfg_info, &created);
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if (st != MXL_STATUS_OK) {
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log("mxlCreateFlowWriter failed (status=%d)", st);
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return;
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}
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const uint32_t stride = cfg_info.discrete.sliceSizes[0];
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log("stride=%u B/line grain=%u B ring=%u grains",
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stride, stride * static_cast<uint32_t>(height), cfg_info.discrete.grainCount);
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const mxlRational rate = {fps_num, fps_den};
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uint64_t index = mxlGetCurrentIndex(&rate);
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log("start index=%llu", index);
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while (dmf::g_running.load(std::memory_order_relaxed)) {
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mxlGrainInfo grain{};
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uint8_t* buf = nullptr;
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st = mxlFlowWriterOpenGrain(writer, index, &grain, &buf);
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if (st != MXL_STATUS_OK) {
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log("OpenGrain failed (status=%d), skipping index=%llu", st, index);
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index++;
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continue;
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}
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dmf::v210::fill_frame(buf, width, height, stride);
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grain.flags = 0;
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grain.validSlices = grain.totalSlices; // mark grain complete so readers can consume it
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mxlFlowWriterCommitGrain(writer, &grain);
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const uint64_t ns = mxlGetNsUntilIndex(index + 1, &rate);
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if (ns > 0 && ns < 2'000'000'000ULL) mxlSleepForNs(ns);
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index++;
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}
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log("stopped at index=%llu", index);
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mxlReleaseFlowWriter(instance(), writer);
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}
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};
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int main() {
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TestPatternNode node;
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return node.execute();
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}
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