Init foo_input_joc

tests/scan_selftest.cpp

@@ -0,0 +1,46 @@
+// Standalone self-test for the JOC bitstream gate.
+//
+//   scan_selftest <file.eac3> [more files...]
+//
+// Prints, per file, how many of the first syncframes carry the JOC EMDF container.
+// Run it against a known JOC stream and against one whose extension has been
+// stripped (ffmpeg -c copy -bsf:a eac3_core): the first must report every frame
+// with JOC, the second none.
+
+#include <cstdio>
+#include <cstdlib>
+#include <vector>
+
+#include "../src/eac3_scan.h"
+
+int main(int argc, char** argv) {
+    if (argc < 2) {
+        std::fprintf(stderr, "usage: scan_selftest <file> [more files...]\n");
+        return 2;
+    }
+    int failures = 0;
+    for (int i = 1; i < argc; ++i) {
+        std::FILE* file = std::fopen(argv[i], "rb");
+        if (file == nullptr) {
+            std::fprintf(stderr, "%s: cannot open\n", argv[i]);
+            ++failures;
+            continue;
+        }
+        std::vector<unsigned char> buffer(256u * 1024u);
+        const std::size_t got = std::fread(buffer.data(), 1, buffer.size(), file);
+        std::fclose(file);
+
+        const joc_eac3::ScanResult result = joc_eac3::scan(buffer.data(), got, 64);
+        const char* state = "unknown";
+        if (result.joc == joc_eac3::JocState::kYes) state = "JOC";
+        else if (result.joc == joc_eac3::JocState::kNo) state = "not-JOC";
+
+        std::printf("%-28s %-8s frames=%llu with_joc=%llu first_frame=%llu same_size=%s\n",
+                    argv[i], state, static_cast<unsigned long long>(result.frames_examined),
+                    static_cast<unsigned long long>(result.frames_with_joc),
+                    static_cast<unsigned long long>(result.first_frame_bytes),
+                    result.all_frames_same_size ? "yes" : "no");
+        std::printf("%-28s   %s\n", "", result.detail);
+    }
+    return failures == 0 ? 0 : 1;
+}