/**
 * @file
 * @brief Header file for FFmpegUtilities
 * @author Jonathan Thomas <jonathan@openshot.org>
 *
 * @section LICENSE
 *
 * Copyright (c) 2008-2013 OpenShot Studios, LLC
 * (http://www.openshotstudios.com). This file is part of
 * OpenShot Library (http://www.openshot.org), an open-source project
 * dedicated to delivering high quality video editing and animation solutions
 * to the world.
 *
 * OpenShot Library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OpenShot Library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenShot Library.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef OPENSHOT_FFMPEG_UTILITIES_H
#define OPENSHOT_FFMPEG_UTILITIES_H

	// Required for libavformat to build on Windows
	#ifndef INT64_C
	#define INT64_C(c) (c ## LL)
	#define UINT64_C(c) (c ## ULL)
	#endif

	// Include the FFmpeg headers
	extern "C" {
		#include <libavcodec/avcodec.h>
		#include <libavformat/avformat.h>
		#include <libswscale/swscale.h>
		#include <libavutil/mathematics.h>

		// libavutil changed folders at some point
		#if LIBAVFORMAT_VERSION_MAJOR >= 53
			#include <libavutil/opt.h>
		#else
			#include <libavcodec/opt.h>
		#endif

	}

	// This was removed from newer versions of FFmpeg (but still used in libopenshot)
	#ifndef AVCODEC_MAX_AUDIO_FRAME_SIZE
		#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
	#endif
	#ifndef AV_ERROR_MAX_STRING_SIZE
		#define AV_ERROR_MAX_STRING_SIZE 64
	#endif

	// This wraps an unsafe C macro to be C++ compatible function
	static const std::string av_make_error_string(int errnum)
	{
		char errbuf[AV_ERROR_MAX_STRING_SIZE];
		av_strerror(errnum, errbuf, AV_ERROR_MAX_STRING_SIZE);
		return (std::string)errbuf;
	}

	// Redefine the C macro to use our new C++ function
	#undef av_err2str
	#define av_err2str(errnum) av_make_error_string(errnum).c_str()

#endif