avutil

package
v0.0.0-...-e84a0dc Latest Latest
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 Go to latest Published: May 10, 2020 License: MIT Imports: 6 Imported by: 0

Documentation

Overview

Package avutil is a utility library to aid portable multimedia programming. It contains safe portable string functions, random number generators, data structures, additional mathematics functions, cryptography and multimedia related functionality. Some generic features and utilities provided by the libavutil library

Package avutil is a utility library to aid portable multimedia programming. It contains safe portable string functions, random number generators, data structures, additional mathematics functions, cryptography and multimedia related functionality. Some generic features and utilities provided by the libavutil library

Package avutil is a utility library to aid portable multimedia programming. It contains safe portable string functions, random number generators, data structures, additional mathematics functions, cryptography and multimedia related functionality. Some generic features and utilities provided by the libavutil library

Index

Constants

View Source 
const (
	AV_DICT_MATCH_CASE      = int(C.AV_DICT_MATCH_CASE)
	AV_DICT_IGNORE_SUFFIX   = int(C.AV_DICT_IGNORE_SUFFIX)
	AV_DICT_DONT_STRDUP_KEY = int(C.AV_DICT_DONT_STRDUP_KEY)
	AV_DICT_DONT_STRDUP_VAL = int(C.AV_DICT_DONT_STRDUP_VAL)
	AV_DICT_DONT_OVERWRITE  = int(C.AV_DICT_DONT_OVERWRITE)
	AV_DICT_APPEND          = int(C.AV_DICT_APPEND)
	AV_DICT_MULTIKEY        = int(C.AV_DICT_MULTIKEY)
)
View Source 
const (
	AvErrorEOF    = -('E' | ('O' << 8) | ('F' << 16) | (' ' << 24))
	AvErrorEAGAIN = -35
)
View Source 
const (
	AV_LOG_QUIET   = -8
	AV_LOG_PANIC   = 0
	AV_LOG_FATAL   = 8
	AV_LOG_ERROR   = 16
	AV_LOG_WARNING = 24
	AV_LOG_INFO    = 32
	AV_LOG_VERBOSE = 40
	AV_LOG_DEBUG   = 48
	AV_LOG_TRACE   = 56
)

Variables

This section is empty.

Functions

func AvCalloc 

func AvCalloc(n, s uintptr) unsafe.Pointer

Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block.

func AvDynarray2Add 

func AvDynarray2Add(t *unsafe.Pointer, n *int, e uintptr, d uint8) unsafe.Pointer

Add an element of size elem_size to a dynamic array.

func AvDynarrayAdd 

func AvDynarrayAdd(t unsafe.Pointer, n *int, e unsafe.Pointer)

Add an element to a dynamic array.

func AvDynarrayAddNofree 

func AvDynarrayAddNofree(p unsafe.Pointer, n *int, e unsafe.Pointer) int

Add an element to a dynamic array.

func AvFastMalloc 

func AvFastMalloc(p unsafe.Pointer, s *uint, m uintptr)

Allocate a buffer, reusing the given one if large enough.

func AvFastRealloc 

func AvFastRealloc(p unsafe.Pointer, s *uint, m uintptr) unsafe.Pointer

Reallocate the given block if it is not large enough, otherwise do nothing.

func AvFrameCopyProps 

func AvFrameCopyProps(d, s *Frame) int

Copy only "metadata" fields from src to dst.

func AvFrameFree 

func AvFrameFree(f *Frame)

Free the frame and any dynamically allocated objects in it, e.g.

func AvFrameGetBuffer 

func AvFrameGetBuffer(f *Frame, a int) int

Allocate new buffer(s) for audio or video data.

func AvFrameGetInfo 

func AvFrameGetInfo(f *Frame) (width int, height int, linesize [8]int32, data [8]*uint8)

func AvFrameGetQpTable 

func AvFrameGetQpTable(f *Frame, s, t *int) int8

func AvFrameIsWritable 

func AvFrameIsWritable(f *Frame) int

Check if the frame data is writable.

func AvFrameMakeWritable 

func AvFrameMakeWritable(f *Frame) int

Ensure that the frame data is writable, avoiding data copy if possible.

func AvFrameMoveRef 

func AvFrameMoveRef(d, s *Frame)

Move everythnig contained in src to dst and reset src.

func AvFrameRef 

func AvFrameRef(d, s *Frame) int

Setup a new reference to the data described by an given frame.

func AvFrameSetQpTable 

func AvFrameSetQpTable(f *Frame, b *AvBufferRef, s, q int) int

func AvFrameUnref 

func AvFrameUnref(f *Frame)

Unreference all the buffers referenced by frame and reset the frame fields.

func AvFree 

func AvFree(p unsafe.Pointer)

Free a memory block which has been allocated with av_malloc(z)() or av_realloc().

func AvFreep 

func AvFreep(p unsafe.Pointer)

Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer pointing to it to NULL.

func AvGetMediaTypeString 

func AvGetMediaTypeString(mt MediaType) string

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

func AvGetPictureTypeChar 

func AvGetPictureTypeChar(pt AvPictureType) string

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

func AvIntListLengthForSize 

func AvIntListLengthForSize(e uint, l int, t uint64) uint

Compute the length of an integer list.

func AvLogGetLevel 

func AvLogGetLevel() int

func AvLogSetLevel 

func AvLogSetLevel(level int)

func AvMalloc 

func AvMalloc(s uintptr) unsafe.Pointer

Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU).

func AvMallocArray 

func AvMallocArray(n, s uintptr) unsafe.Pointer

func AvMallocz 

func AvMallocz(s uintptr) unsafe.Pointer

Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block.

func AvMalloczArray 

func AvMalloczArray(n, s uintptr) unsafe.Pointer

func AvMaxAlloc 

func AvMaxAlloc(m uintptr)

Set the maximum size that may me allocated in one block.

func AvMemcpyBackptr 

func AvMemcpyBackptr(d *uintptr, b, c int)

deliberately overlapping memcpy implementation

func AvMemdup 

func AvMemdup(p *int, s uintptr) unsafe.Pointer

Duplicate the buffer p.

func AvRealloc 

func AvRealloc(p *int, s uintptr) unsafe.Pointer

Allocate or reallocate a block of memory.

func AvReallocArray 

func AvReallocArray(p int, n, s uintptr) unsafe.Pointer

func AvReallocF 

func AvReallocF(p int, n, e uintptr) unsafe.Pointer

Allocate or reallocate a block of memory.

func AvReallocp 

func AvReallocp(p int, s uintptr) int

Allocate or reallocate a block of memory.

func AvReallocpArray 

func AvReallocpArray(p int, n, s uintptr) int

func AvSetFrame 

func AvSetFrame(f *Frame, w int, h int, pixFmt int) (err error)

func AvSizeMult 

func AvSizeMult(a, b uintptr, r *uintptr) int

Multiply two size_t values checking for overflow.

func AvStrdup 

func AvStrdup(s string) string

Duplicate the string s.

func AvStrndup 

func AvStrndup(s string, l uintptr) string

char * av_strndup (const char *s, size_t len) av_malloc_attrib Duplicate a substring of the string s.

func AvXIfNull 

func AvXIfNull(p, x int)

Return x default pointer in case p is NULL.

func AvutilConfiguration 

func AvutilConfiguration() string

Return the libavutil build-time configuration.

func AvutilLicense 

func AvutilLicense() string

Return the libavutil license.

func AvutilVersion 

func AvutilVersion() uint

Return the LIBAvUTIL_VERSION_INT constant.

func Data 

func Data(f *Frame) (data [8]*uint8)

func ErrorFromCode 

func ErrorFromCode(code int) error

func GetBestEffortTimestamp 

func GetBestEffortTimestamp(f *Frame) int64

func GetPicture 

func GetPicture(f *Frame) (img *image.YCbCr, err error)

GetPicture creates a YCbCr image from the frame

func GetPictureRGB 

func GetPictureRGB(f *Frame) (img *image.RGBA, err error)

func Linesize 

func Linesize(f *Frame) (linesize [8]int32)

func SetPicture 

func SetPicture(f *Frame, img *image.YCbCr)

SetPicture sets the image pointer of |f| to the image pointers of |img|

Types

type AvBuffer 

type AvBuffer C.struct_AVBuffer

type AvBufferPool 

type AvBufferPool C.struct_AVBufferPool

type AvBufferRef 

type AvBufferRef C.struct_AVBufferRef

func AvFrameGetPlaneBuffer 

func AvFrameGetPlaneBuffer(f *Frame, p int) *AvBufferRef

Get the buffer reference a given data plane is stored in.

type AvFrameSideData 

type AvFrameSideData C.struct_AVFrameSideData

func AvFrameGetSideData 

func AvFrameGetSideData(f *Frame, t AvFrameSideDataType) *AvFrameSideData

func AvFrameNewSideData 

func AvFrameNewSideData(f *Frame, d AvFrameSideDataType, s int) *AvFrameSideData

Add a new side data to a frame.

type AvFrameSideDataType 

type AvFrameSideDataType C.enum_AVFrameSideDataType

type AvPictureType 

type AvPictureType C.enum_AVPictureType

type AvTree 

type AvTree C.struct_AVTree

type Dictionary 

type Dictionary C.struct_AVDictionary

func AvprivFrameGetMetadatap 

func AvprivFrameGetMetadatap(f *Frame) *Dictionary

func (*Dictionary) AvDictCopy 

func (d *Dictionary) AvDictCopy(src *Dictionary, flags int) int

func (*Dictionary) AvDictCount 

func (d *Dictionary) AvDictCount() int

func (*Dictionary) AvDictFree 

func (d *Dictionary) AvDictFree()

func (*Dictionary) AvDictGet 

func (d *Dictionary) AvDictGet(key string, prev *DictionaryEntry, flags int) *DictionaryEntry

func (*Dictionary) AvDictGetString 

func (d *Dictionary) AvDictGetString(key_val_sep, pairs_sep byte) (int, string)

func (*Dictionary) AvDictParseString 

func (d *Dictionary) AvDictParseString(str, key_val_sep, pairs_sep string, flags int) int

func (*Dictionary) AvDictSet 

func (d *Dictionary) AvDictSet(key, value string, flags int) int

func (*Dictionary) AvDictSetInt 

func (d *Dictionary) AvDictSetInt(key string, value int64, flags int) int

type DictionaryEntry 

type DictionaryEntry C.struct_AVDictionaryEntry

func (*DictionaryEntry) Key 

func (d *DictionaryEntry) Key() string

func (*DictionaryEntry) Value 

func (d *DictionaryEntry) Value() string

type File 

type File C.FILE

func AvFopenUtf8 

func AvFopenUtf8(p, m string) *File

Open a file using a UTF-8 filename.

type Frame 

type Frame C.struct_AVFrame

func AvFrameAlloc 

func AvFrameAlloc() *Frame

Allocate an Frame and set its fields to default values.

func AvFrameClone 

func AvFrameClone(f *Frame) *Frame

Create a new frame that references the same data as src.

type MediaType 

type MediaType C.enum_AVMediaType

type Options 

type Options C.struct_AVOptions

type PixelFormat 

type PixelFormat C.enum_AVPixelFormat

type Rational 

type Rational C.struct_AVRational

func AvGetTimeBaseQ 

func AvGetTimeBaseQ() Rational

Return the fractional representation of the internal time base.

Source Files

View all Source files

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