author | Wuzzy <almikes@aol.com> |
Sat, 15 Apr 2017 06:52:14 +0200 | |
changeset 12256 | 789277d46784 |
parent 7813 | 7ac83d79b897 |
permissions | -rw-r--r-- |
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/* |
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* 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 |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_AVUTIL_H |
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#define AVUTIL_AVUTIL_H |
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/** |
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* @file |
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* external API header |
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*/ |
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/** |
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* @mainpage |
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* |
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* @section libav_intro Introduction |
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* |
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* This document describes the usage of the different libraries |
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* provided by Libav. |
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* |
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* @li @ref libavc "libavcodec" encoding/decoding library |
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* @li @subpage libavfilter graph based frame editing library |
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* @li @ref libavf "libavformat" I/O and muxing/demuxing library |
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* @li @ref lavd "libavdevice" special devices muxing/demuxing library |
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* @li @ref lavu "libavutil" common utility library |
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* @li @subpage libswscale color conversion and scaling library |
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*/ |
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/** |
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* @defgroup lavu Common utility functions |
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* |
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* @brief |
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* libavutil contains the code shared across all the other Libav |
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* libraries |
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* |
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* @note In order to use the functions provided by avutil you must include |
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* the specific header. |
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* |
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* @{ |
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* |
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* @defgroup lavu_crypto Crypto and Hashing |
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* |
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* @{ |
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* @} |
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* |
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* @defgroup lavu_math Maths |
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* @{ |
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* |
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* @} |
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* |
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* @defgroup lavu_string String Manipulation |
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* |
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* @{ |
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* |
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* @} |
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* |
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* @defgroup lavu_mem Memory Management |
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* |
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* @{ |
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* |
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* @} |
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* |
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* @defgroup lavu_data Data Structures |
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* @{ |
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* |
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* @} |
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* |
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* @defgroup lavu_audio Audio related |
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* @{ |
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* |
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* @} |
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* |
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* @defgroup lavu_error Error Codes |
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* @{ |
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* |
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* @} |
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* @defgroup lavu_misc Other |
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* |
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* @{ |
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* |
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* @defgroup lavu_internal Internal |
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* |
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* Not exported functions, for internal usage only |
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* |
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* @{ |
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* |
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* @} |
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*/ |
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/** |
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* @defgroup preproc_misc Preprocessor String Macros |
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* |
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* String manipulation macros |
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* |
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* @{ |
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*/ |
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#define AV_STRINGIFY(s) AV_TOSTRING(s) |
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#define AV_TOSTRING(s) #s |
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#define AV_GLUE(a, b) a ## b |
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#define AV_JOIN(a, b) AV_GLUE(a, b) |
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#define AV_PRAGMA(s) _Pragma(#s) |
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/** |
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* @} |
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*/ |
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/** |
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* @defgroup version_utils Library Version Macros |
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* |
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* Useful to check and match library version in order to maintain |
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* backward compatibility. |
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* |
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* @{ |
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*/ |
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#define AV_VERSION_INT(a, b, c) (a<<16 | b<<8 | c) |
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#define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c |
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#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c) |
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/** |
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* @} |
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*/ |
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/** |
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* @addtogroup lavu_ver |
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* @{ |
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*/ |
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/** |
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* Return the LIBAVUTIL_VERSION_INT constant. |
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unsigned avutil_version(void); |
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/** |
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* Return the libavutil build-time configuration. |
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*/ |
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const char *avutil_configuration(void); |
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/** |
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* Return the libavutil license. |
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const char *avutil_license(void); |
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* @} |
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*/ |
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/** |
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* @addtogroup lavu_media Media Type |
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* @brief Media Type |
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*/ |
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enum AVMediaType { |
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AVMEDIA_TYPE_UNKNOWN = -1, ///< Usually treated as AVMEDIA_TYPE_DATA |
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AVMEDIA_TYPE_VIDEO, |
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AVMEDIA_TYPE_AUDIO, |
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AVMEDIA_TYPE_DATA, ///< Opaque data information usually continuous |
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AVMEDIA_TYPE_SUBTITLE, |
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AVMEDIA_TYPE_ATTACHMENT, ///< Opaque data information usually sparse |
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AVMEDIA_TYPE_NB |
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}; |
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/** |
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* @defgroup lavu_const Constants |
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* @{ |
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* |
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* @defgroup lavu_enc Encoding specific |
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* |
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* @note those definition should move to avcodec |
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* @{ |
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*/ |
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#define FF_LAMBDA_SHIFT 7 |
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#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT) |
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#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda |
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#define FF_LAMBDA_MAX (256*128-1) |
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#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove |
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/** |
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* @} |
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* @defgroup lavu_time Timestamp specific |
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* |
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* Libav internal timebase and timestamp definitions |
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* |
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* @{ |
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*/ |
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/** |
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* @brief Undefined timestamp value |
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* |
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* Usually reported by demuxer that work on containers that do not provide |
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* either pts or dts. |
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*/ |
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#define AV_NOPTS_VALUE INT64_C(0x8000000000000000) |
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/** |
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* Internal time base represented as integer |
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*/ |
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#define AV_TIME_BASE 1000000 |
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/** |
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* Internal time base represented as fractional value |
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*/ |
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#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE} |
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/** |
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* @} |
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* @} |
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* @defgroup lavu_picture Image related |
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* |
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* AVPicture types, pixel formats and basic image planes manipulation. |
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* |
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* @{ |
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*/ |
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enum AVPictureType { |
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AV_PICTURE_TYPE_I = 1, ///< Intra |
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AV_PICTURE_TYPE_P, ///< Predicted |
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AV_PICTURE_TYPE_B, ///< Bi-dir predicted |
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AV_PICTURE_TYPE_S, ///< S(GMC)-VOP MPEG4 |
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AV_PICTURE_TYPE_SI, ///< Switching Intra |
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AV_PICTURE_TYPE_SP, ///< Switching Predicted |
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AV_PICTURE_TYPE_BI, ///< BI type |
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}; |
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/** |
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* Return a single letter to describe the given picture type |
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* pict_type. |
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* |
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* @param[in] pict_type the picture type @return a single character |
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* representing the picture type, '?' if pict_type is unknown |
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*/ |
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char av_get_picture_type_char(enum AVPictureType pict_type); |
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/** |
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* @} |
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*/ |
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#include "error.h" |
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#include "version.h" |
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/** |
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* @} |
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* @} |
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*/ |
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#endif /* AVUTIL_AVUTIL_H */ |