obs-studio/libobs/obs-ffmpeg-compat.h

#pragma once

#include <libavcodec/avcodec.h>

/* LIBAVCODEC_VERSION_CHECK checks for the right version of libav and FFmpeg
 * a is the major version
 * b and c the minor and micro versions of libav
 * d and e the minor and micro versions of FFmpeg */
#define LIBAVCODEC_VERSION_CHECK(a, b, c, d, e)                 \
	((LIBAVCODEC_VERSION_MICRO < 100 &&                     \
	  LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(a, b, c)) || \
	 (LIBAVCODEC_VERSION_MICRO >= 100 &&                    \
	  LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(a, d, e)))

#if !LIBAVCODEC_VERSION_CHECK(54, 28, 0, 59, 100)
#define avcodec_free_frame av_freep
#endif

#if LIBAVCODEC_VERSION_INT < 0x371c01
#define av_frame_alloc avcodec_alloc_frame
#define av_frame_unref avcodec_get_frame_defaults
#define av_frame_free avcodec_free_frame
#endif

#if LIBAVCODEC_VERSION_MAJOR >= 58
#define CODEC_CAP_TRUNC AV_CODEC_CAP_TRUNCATED
#define CODEC_FLAG_TRUNC AV_CODEC_FLAG_TRUNCATED
#define INPUT_BUFFER_PADDING_SIZE AV_INPUT_BUFFER_PADDING_SIZE
#else
#define CODEC_CAP_TRUNC CODEC_CAP_TRUNCATED
#define CODEC_FLAG_TRUNC CODEC_FLAG_TRUNCATED
#define INPUT_BUFFER_PADDING_SIZE FF_INPUT_BUFFER_PADDING_SIZE
#endif