GPU (Linux): rewrite; drop libpci dependency

2026-11-07 05:34:20 +01:00 · 2024-01-31 10:20:49 +08:00
parent 736d5316cc
commit b01d2bdd8c
3 changed files with 191 additions and 300 deletions
@@ -118,3 +118,73 @@ const char* ffDetectGPU(const FFGPUOptions* options, FFlist* result)

    return "GPU detection failed";
 }
+
+void ffGPUParsePciIds(FFstrbuf* content, uint8_t subclass, uint16_t vendor, uint16_t device, FFGPUResult* gpu)
+{
+    if (content->length)
+    {
+        char buffer[32];
+        uint32_t len = (uint32_t) snprintf(buffer, sizeof(buffer), "\n%04x  ", vendor);
+        char* start = (char*) memmem(content->chars, content->length, buffer, len);
+        char* end = content->chars + content->length;
+        if (start)
+        {
+            start += len;
+            end = memchr(start, '\n', (uint32_t) (end - start));
+            if (!end)
+                end = content->chars + content->length;
+            if (!gpu->vendor.length)
+                ffStrbufSetNS(&gpu->vendor, (uint32_t) (end - start), start);
+
+            start = end; // point to '\n' of vendor
+            end = start + 1; // point to start of devices
+            // find the start of next vendor
+            while (end[0] == '\t' || end[0] == '#')
+            {
+                end = strchr(end, '\n');
+                if (!end)
+                {
+                    end = content->chars + content->length;
+                    break;
+                }
+                else
+                    end++;
+            }
+
+            len = (uint32_t) snprintf(buffer, sizeof(buffer), "\n\t%04x  ", device);
+            start = memmem(start, (size_t) (end - start), buffer, len);
+            if (start)
+            {
+                start += len;
+                end = memchr(start, '\n', (uint32_t) (end - start));
+                if (!end)
+                    end = content->chars + content->length;
+
+                char* openingBracket = memchr(start, '[', (uint32_t) (end - start));
+                if (openingBracket)
+                {
+                    openingBracket++;
+                    char* closingBracket = memchr(openingBracket, ']', (uint32_t) (end - openingBracket));
+                    if (closingBracket)
+                        ffStrbufSetNS(&gpu->name, (uint32_t) (closingBracket - openingBracket), openingBracket);
+                }
+                if (!gpu->name.length)
+                    ffStrbufSetNS(&gpu->name, (uint32_t) (end - start), start);
+            }
+        }
+    }
+
+    if (!gpu->name.length)
+    {
+        const char* subclassStr;
+        switch (subclass)
+        {
+        case 0 /*PCI_CLASS_DISPLAY_VGA*/: subclassStr = " (VGA compatible)"; break;
+        case 1 /*PCI_CLASS_DISPLAY_XGA*/: subclassStr = " (XGA compatible)"; break;
+        case 2 /*PCI_CLASS_DISPLAY_3D*/: subclassStr = " (3D)"; break;
+        default: subclassStr = ""; break;
+        }
+
+        ffStrbufSetF(&gpu->name, "%s Device %04X%s", gpu->vendor.length ? gpu->vendor.chars : "Unknown", device, subclassStr);
+    }
+}