/* * copyright (c) 2006 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg 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 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVUTIL_AVUTIL_H #define AVUTIL_AVUTIL_H /** * @file * external API header */ /** * @mainpage * * @section ffmpeg_intro Introduction * * This document describes the usage of the different libraries * provided by FFmpeg. * * @li @ref libavc "libavcodec" encoding/decoding library * @li @ref lavfi "libavfilter" graph-based frame editing library * @li @ref libavf "libavformat" I/O and muxing/demuxing library * @li @ref lavd "libavdevice" special devices muxing/demuxing library * @li @ref lavu "libavutil" common utility library * @li @ref lswr "libswresample" audio resampling, format conversion and mixing * @li @ref lpp "libpostproc" post processing library * @li @ref lsws "libswscale" color conversion and scaling library */ /** * @defgroup lavu Common utility functions * * @brief * libavutil contains the code shared across all the other FFmpeg * libraries * * @note In order to use the functions provided by avutil you must include * the specific header. * * @{ * * @defgroup lavu_crypto Crypto and Hashing * * @{ * @} * * @defgroup lavu_math Maths * @{ * * @} * * @defgroup lavu_string String Manipulation * * @{ * * @} * * @defgroup lavu_mem Memory Management * * @{ * * @} * * @defgroup lavu_data Data Structures * @{ * * @} * * @defgroup lavu_audio Audio related * * @{ * * @} * * @defgroup lavu_error Error Codes * * @{ * * @} * * @defgroup lavu_misc Other * * @{ * * @defgroup lavu_internal Internal * * Not exported functions, for internal usage only * * @{ * * @} */ /** * @addtogroup lavu_ver * @{ */ /** * Return the LIBAVUTIL_VERSION_INT constant. */ unsigned avutil_version(void); /** * Return the libavutil build-time configuration. */ const char *avutil_configuration(void); /** * Return the libavutil license. */ const char *avutil_license(void); /** * @} */ /** * @addtogroup lavu_media Media Type * @brief Media Type */ enum AVMediaType { AVMEDIA_TYPE_UNKNOWN = -1, ///< Usually treated as AVMEDIA_TYPE_DATA AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA, ///< Opaque data information usually continuous AVMEDIA_TYPE_SUBTITLE, AVMEDIA_TYPE_ATTACHMENT, ///< Opaque data information usually sparse AVMEDIA_TYPE_NB }; /** * Return a string describing the media_type enum, NULL if media_type * is unknown. */ const char *av_get_media_type_string(enum AVMediaType media_type); /** * @defgroup lavu_const Constants * @{ * * @defgroup lavu_enc Encoding specific * * @note those definition should move to avcodec * @{ */ #define FF_LAMBDA_SHIFT 7 #define FF_LAMBDA_SCALE (1<