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113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/**
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* @file
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* @brief Header file for FFmpegUtilities
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* @author Jonathan Thomas <jonathan@openshot.org>
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*
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* @section LICENSE
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*
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* Copyright (c) 2008-2014 OpenShot Studios, LLC
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* <http://www.openshotstudios.com/>. This file is part of
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* OpenShot Library (libopenshot), an open-source project dedicated to
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* delivering high quality video editing and animation solutions to the
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* world. For more information visit <http://www.openshot.org/>.
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*
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* OpenShot Library (libopenshot) is free software: you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* OpenShot Library (libopenshot) is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPENSHOT_FFMPEG_UTILITIES_H
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#define OPENSHOT_FFMPEG_UTILITIES_H
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// Required for libavformat to build on Windows
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#ifndef INT64_C
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#define INT64_C(c) (c ## LL)
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#define UINT64_C(c) (c ## ULL)
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#endif
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// Include the FFmpeg headers
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extern "C" {
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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#include <libavresample/avresample.h>
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#include <libavutil/mathematics.h>
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#include <libavutil/pixfmt.h>
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#include <libavutil/pixdesc.h>
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// libavutil changed folders at some point
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#if LIBAVFORMAT_VERSION_MAJOR >= 53
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#include <libavutil/opt.h>
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#else
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#include <libavcodec/opt.h>
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#endif
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// channel header refactored
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#if LIBAVFORMAT_VERSION_MAJOR >= 54
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#include <libavutil/channel_layout.h>
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#endif
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}
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// This was removed from newer versions of FFmpeg (but still used in libopenshot)
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#ifndef AVCODEC_MAX_AUDIO_FRAME_SIZE
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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#endif
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#ifndef AV_ERROR_MAX_STRING_SIZE
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#define AV_ERROR_MAX_STRING_SIZE 64
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#endif
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#ifndef AUDIO_PACKET_ENCODING_SIZE
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#define AUDIO_PACKET_ENCODING_SIZE 768000 // 48khz * S16 (2 bytes) * max channels (8)
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#endif
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// This wraps an unsafe C macro to be C++ compatible function
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static const std::string av_make_error_string(int errnum)
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{
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char errbuf[AV_ERROR_MAX_STRING_SIZE];
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av_strerror(errnum, errbuf, AV_ERROR_MAX_STRING_SIZE);
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std::string errstring(errbuf);
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return errstring;
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}
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// Redefine the C macro to use our new C++ function
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#undef av_err2str
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#define av_err2str(errnum) av_make_error_string(errnum).c_str()
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// Define this for compatibility
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#ifndef PixelFormat
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#define PixelFormat AVPixelFormat
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#endif
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#ifndef PIX_FMT_RGBA
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#define PIX_FMT_RGBA AV_PIX_FMT_RGBA
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#endif
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#ifndef PIX_FMT_NONE
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#define PIX_FMT_NONE AV_PIX_FMT_NONE
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#endif
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#ifndef PIX_FMT_RGB24
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#define PIX_FMT_RGB24 AV_PIX_FMT_RGB24
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#endif
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#ifndef PIX_FMT_YUV420P
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#define PIX_FMT_YUV420P AV_PIX_FMT_YUV420P
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#endif
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#if LIBAVFORMAT_VERSION_MAJOR >= 55
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#define AV_ALLOCATE_FRAME() av_frame_alloc()
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#define AV_RESET_FRAME(av_frame) av_frame_unref(av_frame)
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#define AV_FREE_FRAME(av_frame) av_frame_free(av_frame)
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#else
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#define AV_ALLOCATE_FRAME() avcodec_alloc_frame()
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#define AV_RESET_FRAME(av_frame) avcodec_get_frame_defaults(av_frame)
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#define AV_FREE_FRAME(av_frame) avcodec_free_frame(av_frame)
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#endif
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#endif
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