+
−/*
+
− * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+
− *
+
− * This file is part of Libav.
+
− *
+
− * Libav 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.
+
− *
+
− * Libav 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 Libav; 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 libav_intro Introduction
+
− *
+
− * This document describes the usage of the different libraries
+
− * provided by Libav.
+
− *
+
− * @li @ref libavc "libavcodec" encoding/decoding library
+
− * @li @subpage 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 @subpage libswscale  color conversion and scaling library
+
− */
+
−
+
−/**
+
− * @defgroup lavu Common utility functions
+
− *
+
− * @brief
+
− * libavutil contains the code shared across all the other Libav
+
− * 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
+
− *
+
− * @{
+
− *
+
− * @}
+
− */
+
−
+
−
+
−/**
+
− * @defgroup preproc_misc Preprocessor String Macros
+
− *
+
− * String manipulation macros
+
− *
+
− * @{
+
− */
+
−
+
−#define AV_STRINGIFY(s)         AV_TOSTRING(s)
+
−#define AV_TOSTRING(s) #s
+
−
+
−#define AV_GLUE(a, b) a ## b
+
−#define AV_JOIN(a, b) AV_GLUE(a, b)
+
−
+
−#define AV_PRAGMA(s) _Pragma(#s)
+
−
+
−/**
+
− * @}
+
− */
+
−
+
−/**
+
− * @defgroup version_utils Library Version Macros
+
− *
+
− * Useful to check and match library version in order to maintain
+
− * backward compatibility.
+
− *
+
− * @{
+
− */
+
−
+
−#define AV_VERSION_INT(a, b, c) (a<<16 | b<<8 | c)
+
−#define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
+
−#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
+
−
+
−/**
+
− * @}
+
− */
+
−
+
−/**
+
− * @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
+
−};
+
−
+
−/**
+
− * @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<<FF_LAMBDA_SHIFT)
+
−#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
+
−#define FF_LAMBDA_MAX (256*128-1)
+
−
+
−#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
+
−
+
−/**
+
− * @}
+
− * @defgroup lavu_time Timestamp specific
+
− *
+
− * Libav internal timebase and timestamp definitions
+
− *
+
− * @{
+
− */
+
−
+
−/**
+
− * @brief Undefined timestamp value
+
− *
+
− * Usually reported by demuxer that work on containers that do not provide
+
− * either pts or dts.
+
− */
+
−
+
−#define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
+
−
+
−/**
+
− * Internal time base represented as integer
+
− */
+
−
+
−#define AV_TIME_BASE            1000000
+
−
+
−/**
+
− * Internal time base represented as fractional value
+
− */
+
−
+
−#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
+
−
+
−/**
+
− * @}
+
− * @}
+
− * @defgroup lavu_picture Image related
+
− *
+
− * AVPicture types, pixel formats and basic image planes manipulation.
+
− *
+
− * @{
+
− */
+
−
+
−enum AVPictureType {
+
−    AV_PICTURE_TYPE_I = 1, ///< Intra
+
−    AV_PICTURE_TYPE_P,     ///< Predicted
+
−    AV_PICTURE_TYPE_B,     ///< Bi-dir predicted
+
−    AV_PICTURE_TYPE_S,     ///< S(GMC)-VOP MPEG4
+
−    AV_PICTURE_TYPE_SI,    ///< Switching Intra
+
−    AV_PICTURE_TYPE_SP,    ///< Switching Predicted
+
−    AV_PICTURE_TYPE_BI,    ///< BI type
+
−};
+
−
+
−/**
+
− * Return a single letter to describe the given picture type
+
− * pict_type.
+
− *
+
− * @param[in] pict_type the picture type @return a single character
+
− * representing the picture type, '?' if pict_type is unknown
+
− */
+
−char av_get_picture_type_char(enum AVPictureType pict_type);
+
−
+
−/**
+
− * @}
+
− */
+
−
+
−#include "error.h"
+
−#include "version.h"
+
−
+
−/**
+
− * @}
+
− * @}
+
− */
+
−
+
−#endif /* AVUTIL_AVUTIL_H */