FFmpeg: libavutil/avutil.h File Reference

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libavutil

avutil.h File Reference

external API header More...

#include "common.h"
#include "error.h"
#include "version.h"
#include "mathematics.h"
#include "rational.h"
#include "intfloat_readwrite.h"
#include "log.h"
#include "pixfmt.h"

Go to the source code of this file.

Macros

#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

#define AV_NOPTS_VALUE ((int64_t)UINT64_C(0x8000000000000000))

Undefined timestamp value.

#define AV_TIME_BASE 1000000

Internal time base represented as integer.

#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}

Internal time base represented as fractional value.

#define av_int_list_length(list, term) av_int_list_length_for_size(sizeof(*(list)), list, term)

Compute the length of an integer list.

Enumerations

enum AVMediaType {
AVMEDIA_TYPE_UNKNOWN = -1, AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA,
AVMEDIA_TYPE_SUBTITLE, AVMEDIA_TYPE_ATTACHMENT, AVMEDIA_TYPE_NB
}

enum AVPictureType {
AV_PICTURE_TYPE_NONE = 0, AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B,
AV_PICTURE_TYPE_S, AV_PICTURE_TYPE_SI, AV_PICTURE_TYPE_SP, AV_PICTURE_TYPE_BI
}

Functions

unsigned avutil_version (void)

Return the LIBAVUTIL_VERSION_INT constant.

const char * avutil_configuration (void)

Return the libavutil build-time configuration.

const char * avutil_license (void)

Return the libavutil license.

const char * av_get_media_type_string (enum AVMediaType media_type)

Return a string describing the media_type enum, NULL if media_type is unknown.

char av_get_picture_type_char (enum AVPictureType pict_type)

Return a single letter to describe the given picture type pict_type.

static void * av_x_if_null (const void *p, const void *x)

Return x default pointer in case p is NULL.

unsigned av_int_list_length_for_size (unsigned elsize, const void *list, uint64_t term) av_pure

Compute the length of an integer list.

Detailed Description

external API header

Definition in file avutil.h.

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