deploy: current vibn theia state

Made-with: Cursor

dev-packages/ffmpeg/native/win-ffmpeg.c

@@ -0,0 +1,77 @@
+// *****************************************************************************
+// Copyright (C) 2019 Ericsson and others.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License v. 2.0 which is available at
+// http://www.eclipse.org/legal/epl-2.0.
+//
+// This Source Code may also be made available under the following Secondary
+// Licenses when the conditions for such availability set forth in the Eclipse
+// Public License v. 2.0 are satisfied: GNU General Public License, version 2
+// with the GNU Classpath Exception which is available at
+// https://www.gnu.org/software/classpath/license.html.
+//
+// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
+// *****************************************************************************
+#ifndef WIN_FFMPEG
+#define WIN_FFMPEG
+
+#include <windows.h>
+
+#include "ffmpeg.h"
+
+static char *error_library_not_found = "shared library not found";
+static char *error_function_not_found = "function not found in shared library";
+static char *error_cannot_free_library = "cannot free shared library";
+
+char *load_ffmpeg_library(struct FFMPEG_Library *library, char *library_path)
+{
+    char *error = NULL;
+
+    HMODULE handle = LoadLibrary(library_path);
+    if (!handle)
+    {
+        error = error_library_not_found;
+        goto error;
+    }
+
+    struct AVCodecDescriptor *(*av_codec_next)(const struct AVCodecDescriptor *) = (struct AVCodecDescriptor * (*)(const struct AVCodecDescriptor *))
+        GetProcAddress(handle, "avcodec_descriptor_next");
+    if (!av_codec_next)
+    {
+        error = error_function_not_found;
+        goto error;
+    }
+
+    struct AVCodec *(*avcodec_find_decoder)(enum AVCodecID) = (struct AVCodec * (*)(enum AVCodecID))
+        GetProcAddress(handle, "avcodec_find_decoder");
+    if (!avcodec_find_decoder)
+    {
+        error = error_function_not_found;
+        goto error;
+    }
+
+    library->handle = handle;
+    library->avcodec_descriptor_next = av_codec_next;
+    library->avcodec_find_decoder = avcodec_find_decoder;
+    return NULL;
+
+error:
+    if (handle)
+    {
+        FreeLibrary(handle);
+    }
+    return error;
+}
+
+char *unload_ffmpeg_library(struct FFMPEG_Library *library)
+{
+    if (library->handle && FreeLibrary(library->handle))
+    {
+        *library = NULL_FFMPEG_LIBRARY;
+        return NULL;
+    }
+    return error_cannot_free_library;
+}
+
+#endif // WIN_FFMPEG guard