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