//  Copyright (c) 2007-2011 Fredrik Mellbin
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.

#ifndef FFMSCOMPAT_H
#define	FFMSCOMPAT_H

// Defaults to libav compatibility, uncomment (when building with msvc) to force ffmpeg compatibility.
//#define FFMS_USE_FFMPEG_COMPAT

// Attempt to auto-detect whether or not we are using ffmpeg.  Newer versions of ffmpeg have their micro versions 100+
#if LIBAVFORMAT_VERSION_MICRO > 99 || LIBAVUTIL_VERSION_MICRO > 99 || LIBAVCODEC_VERSION_MICRO > 99 || LIBSWSCALE_VERSION_MICRO > 99
#	ifndef FFMS_USE_FFMPEG_COMPAT
#		define FFMS_USE_FFMPEG_COMPAT
#	endif
#endif

// Helper to handle checking for different versions in libav and ffmpeg
// First version is required libav versio, second is required ffmpeg version
#ifdef FFMS_USE_FFMPEG_COMPAT
#  define VERSION_CHECK(LIB, cmp, u1, u2, u3, major, minor, micro) ((LIB) cmp (AV_VERSION_INT(major, minor, micro)))
#else
#  define VERSION_CHECK(LIB, cmp, major, minor, micro, u1, u2, u3) ((LIB) cmp (AV_VERSION_INT(major, minor, micro)))
#endif

#if defined(_WIN32) && !defined(__MINGW64_VERSION_MAJOR)
#	define snprintf _snprintf
#	ifdef __MINGW32__
#		define fseeko fseeko64
#		define ftello ftello64
#	else
#		define fseeko _fseeki64
#		define ftello _ftelli64
#	endif
#endif

// Compatibility with older/newer ffmpegs
#ifdef LIBAVFORMAT_VERSION_INT
#	if VERSION_CHECK(LIBAVFORMAT_VERSION_INT, <, 53, 17, 0, 53, 25, 0)
#		define avformat_close_input(c) av_close_input_file(*c)
#	endif
#	if (LIBAVFORMAT_VERSION_INT) < (AV_VERSION_INT(54,2,0))
#		define AV_DISPOSITION_ATTACHED_PIC 0xBEEFFACE
#	endif
#endif

#ifdef LIBAVCODEC_VERSION_INT
#	undef SampleFormat
#	define FFMS_CALCULATE_DELAY (CodecContext->has_b_frames + (CodecContext->thread_count - 1))
#   if VERSION_CHECK(LIBAVCODEC_VERSION_INT, <, 54, 25, 0, 54, 51, 100)
#       define FFMS_ID(x) (CODEC_ID_##x)
#       define FFMS_CodecID CodecID
#   else
#       define FFMS_ID(x) (AV_CODEC_ID_##x)
#       define FFMS_CodecID AVCodecID
#       undef CodecID
#   endif
#   if VERSION_CHECK(LIBAVCODEC_VERSION_INT, <, 54, 28, 0, 54, 59, 100)
static void avcodec_free_frame(AVFrame **frame) { av_freep(frame); }
#   endif
#endif

#ifdef LIBAVUTIL_VERSION_INT
#	if VERSION_CHECK(LIBAVUTIL_VERSION_INT, <, 51, 27, 0, 51, 46, 100)
#		define av_get_packed_sample_fmt(fmt) (fmt < AV_SAMPLE_FMT_U8P ? fmt : fmt - (AV_SAMPLE_FMT_U8P - AV_SAMPLE_FMT_U8))
#	endif
#	if VERSION_CHECK(LIBAVUTIL_VERSION_INT, <, 51, 44, 0, 51, 76, 100)
#		include <libavutil/pixdesc.h>

#		if VERSION_CHECK(LIBAVUTIL_VERSION_INT, <, 51, 42, 0, 51, 74, 100)
#			define AVPixelFormat PixelFormat
#			define AV_PIX_FMT_NB PIX_FMT_NB
#		endif

static const AVPixFmtDescriptor *av_pix_fmt_desc_get(AVPixelFormat pix_fmt) {
	if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
		return NULL;

	return &av_pix_fmt_descriptors[pix_fmt];
}

#	endif
#	if VERSION_CHECK(LIBAVUTIL_VERSION_INT, <, 52, 9, 0, 52, 20, 100)
#		define av_frame_alloc avcodec_alloc_frame
#	endif
#endif

#endif // FFMSCOMPAT_H