Pixel formats

Functions for working with pixel formats. Подробнее...

Граф связей класса Pixel formats:

Функции
attribute_deprecated void	avcodec_get_chroma_sub_sample (enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
unsigned int	avcodec_pix_fmt_to_codec_tag (enum AVPixelFormat pix_fmt)
int	avcodec_get_pix_fmt_loss (enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, int has_alpha)
enum AVPixelFormat	avcodec_find_best_pix_fmt_of_list (const enum AVPixelFormat *pix_fmt_list, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
enum AVPixelFormat	avcodec_find_best_pix_fmt_of_2 (enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
attribute_deprecated enum AVPixelFormat	avcodec_find_best_pix_fmt2 (enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
enum AVPixelFormat	avcodec_default_get_format (struct AVCodecContext *s, const enum AVPixelFormat *fmt)

Подробное описание

Functions for working with pixel formats.

Функции

avcodec_get_chroma_sub_sample()

attribute_deprecated void avcodec_get_chroma_sub_sample	(	enum AVPixelFormat	pix_fmt,
		int *	h_shift,
		int *	v_shift
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>

Уст.:

Use av_pix_fmt_get_chroma_sub_sample

avcodec_pix_fmt_to_codec_tag()

unsigned int avcodec_pix_fmt_to_codec_tag

(

enum AVPixelFormat

pix_fmt

)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>

Return a value representing the fourCC code associated to the pixel format pix_fmt, or 0 if no associated fourCC code can be found.

avcodec_get_pix_fmt_loss()

int avcodec_get_pix_fmt_loss	(	enum AVPixelFormat	dst_pix_fmt,
		enum AVPixelFormat	src_pix_fmt,
		int	has_alpha
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>

Уст.:

see av_get_pix_fmt_loss()

avcodec_find_best_pix_fmt_of_list()

enum AVPixelFormat avcodec_find_best_pix_fmt_of_list	(	const enum AVPixelFormat *	pix_fmt_list,
		enum AVPixelFormat	src_pix_fmt,
		int	has_alpha,
		int *	loss_ptr
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>

Find the best pixel format to convert to given a certain source pixel format. When converting from one pixel format to another, information loss may occur. For example, when converting from RGB24 to GRAY, the color information will be lost. Similarly, other losses occur when converting from some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of the given pixel formats should be used to suffer the least amount of loss. The pixel formats from which it chooses one, are determined by the pix_fmt_list parameter.

Аргументы

[in]	pix_fmt_list	AV_PIX_FMT_NONE terminated array of pixel formats to choose from
[in]	src_pix_fmt	source pixel format
[in]	has_alpha	Whether the source pixel format alpha channel is used.
[out]	loss_ptr	Combination of flags informing you what kind of losses will occur.

Возвращает

The best pixel format to convert to or -1 if none was found.

avcodec_find_best_pix_fmt_of_2()

enum AVPixelFormat avcodec_find_best_pix_fmt_of_2	(	enum AVPixelFormat	dst_pix_fmt1,
		enum AVPixelFormat	dst_pix_fmt2,
		enum AVPixelFormat	src_pix_fmt,
		int	has_alpha,
		int *	loss_ptr
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>

Уст.:

see av_find_best_pix_fmt_of_2()

avcodec_find_best_pix_fmt2()

attribute_deprecated enum AVPixelFormat avcodec_find_best_pix_fmt2	(	enum AVPixelFormat	dst_pix_fmt1,
		enum AVPixelFormat	dst_pix_fmt2,
		enum AVPixelFormat	src_pix_fmt,
		int	has_alpha,
		int *	loss_ptr
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>

avcodec_default_get_format()

enum AVPixelFormat avcodec_default_get_format	(	struct AVCodecContext *	s,
		const enum AVPixelFormat *	fmt
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavcodec/avcodec.h>