FFmpegUtilities.h
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/**
* @file
* @brief Header file for FFmpegUtilities
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @section LICENSE
*
* Copyright (c) 2008-2014 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser 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 (libopenshot) 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 <libavresample/avresample.h>
#include <libavutil/mathematics.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
// libavutil changed folders at some point
#if LIBAVFORMAT_VERSION_MAJOR >= 53
#include <libavutil/opt.h>
#else
#include <libavcodec/opt.h>
#endif
// channel header refactored
#if LIBAVFORMAT_VERSION_MAJOR >= 54
#include <libavutil/channel_layout.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
#ifndef AUDIO_PACKET_ENCODING_SIZE
#define AUDIO_PACKET_ENCODING_SIZE 768000 // 48khz * S16 (2 bytes) * max channels (8)
#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);
std::string errstring(errbuf);
return errstring;
}
// Redefine the C macro to use our new C++ function
#undef av_err2str
#define av_err2str(errnum) av_make_error_string(errnum).c_str()
// Define this for compatibility
#ifndef PixelFormat
#define PixelFormat AVPixelFormat
#endif
#ifndef PIX_FMT_RGBA
#define PIX_FMT_RGBA AV_PIX_FMT_RGBA
#endif
#ifndef PIX_FMT_NONE
#define PIX_FMT_NONE AV_PIX_FMT_NONE
#endif
#ifndef PIX_FMT_RGB24
#define PIX_FMT_RGB24 AV_PIX_FMT_RGB24
#endif
#ifndef PIX_FMT_YUV420P
#define PIX_FMT_YUV420P AV_PIX_FMT_YUV420P
#endif
#if LIBAVFORMAT_VERSION_MAJOR >= 55
#define AV_ALLOCATE_FRAME() av_frame_alloc()
#define AV_RESET_FRAME(av_frame) av_frame_unref(av_frame)
#define AV_FREE_FRAME(av_frame) av_frame_free(av_frame)
#define AV_FREE_PACKET(av_packet) av_packet_unref(av_packet)
#else
#define AV_ALLOCATE_FRAME() avcodec_alloc_frame()
#define AV_RESET_FRAME(av_frame) avcodec_get_frame_defaults(av_frame)
#define AV_FREE_FRAME(av_frame) avcodec_free_frame(av_frame)
#define AV_FREE_PACKET(av_packet) av_free_packet(av_packet)
#endif
#endif
AV_ERROR_MAX_STRING_SIZE
#define AV_ERROR_MAX_STRING_SIZE
Definition: FFmpegUtilities.h:65