#include <stdio.h>
#include <string.h>
#include "common.h"
#include "pixfmt.h"
#include "pixdesc.h"
#include "intreadwrite.h"

Macros
#define	X_NE(be, le) le

Functions
void	av_read_image_line (uint16_t dst, const uint8_t data[4], const int linesize[4], const AVPixFmtDescriptor *desc, int x, int y, int c, int w, int read_pal_component)
	Read a line from an image, and write the values of the pixel format component c to dst.

void	av_write_image_line (const uint16_t src, uint8_t data[4], const int linesize[4], const AVPixFmtDescriptor *desc, int x, int y, int c, int w)
	Write the values from src to the pixel format component c of an image line.

static enum AVPixelFormat	get_pix_fmt_internal (const char *name)

const char *	av_get_pix_fmt_name (enum AVPixelFormat pix_fmt)
	Return the short name for a pixel format, NULL in case pix_fmt is unknown.

enum AVPixelFormat	av_get_pix_fmt (const char *name)
	Return the pixel format corresponding to name.

int	av_get_bits_per_pixel (const AVPixFmtDescriptor *pixdesc)
	Return the number of bits per pixel used by the pixel format described by pixdesc.

int	av_get_padded_bits_per_pixel (const AVPixFmtDescriptor *pixdesc)
	Return the number of bits per pixel for the pixel format described by pixdesc, including any padding or unused bits.

char *	av_get_pix_fmt_string (char *buf, int buf_size, enum AVPixelFormat pix_fmt)
	Print in buf the string corresponding to the pixel format with number pix_fmt, or an header if pix_fmt is negative.

const AVPixFmtDescriptor *	av_pix_fmt_desc_get (enum AVPixelFormat pix_fmt)

const AVPixFmtDescriptor *	av_pix_fmt_desc_next (const AVPixFmtDescriptor *prev)
	Iterate over all pixel format descriptors known to libavutil.

enum AVPixelFormat	av_pix_fmt_desc_get_id (const AVPixFmtDescriptor *desc)

int	av_pix_fmt_get_chroma_sub_sample (enum AVPixelFormat pix_fmt, int h_shift, int v_shift)
	Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.

Variables
const AVPixFmtDescriptor	av_pix_fmt_descriptors [AV_PIX_FMT_NB]

Macro Definition Documentation

#define X_NE	(	be,
		le
	)	le

Definition at line 1686 of file pixdesc.c.

Referenced by av_get_pix_fmt().

Function Documentation

void av_read_image_line	(	uint16_t *	dst,
		const uint8_t *	data[4],
		const int	linesize[4],
		const AVPixFmtDescriptor *	desc,
		int	x,
		int	y,
		int	c,
		int	w,
		int	read_pal_component
	)

Read a line from an image, and write the values of the pixel format component c to dst.

Parameters

data	the array containing the pointers to the planes of the image
linesize	the array containing the linesizes of the image
desc	the pixel format descriptor for the image
x	the horizontal coordinate of the first pixel to read
y	the vertical coordinate of the first pixel to read
w	the width of the line to read, that is the number of values to write to dst
read_pal_component	if not zero and the format is a paletted format writes the values corresponding to the palette component c in data[1] to dst, rather than the palette indexes in data[0]. The behavior is undefined if the format is not paletted.

Definition at line 31 of file pixdesc.c.

Referenced by filter_frame().

void av_write_image_line	(	const uint16_t *	src,
		uint8_t *	data[4],
		const int	linesize[4],
		const AVPixFmtDescriptor *	desc,
		int	x,
		int	y,
		int	c,
		int	w
	)

Write the values from src to the pixel format component c of an image line.

Parameters

src	array containing the values to write
data	the array containing the pointers to the planes of the image to write into. It is supposed to be zeroed.
linesize	the array containing the linesizes of the image
desc	the pixel format descriptor for the image
x	the horizontal coordinate of the first pixel to write
y	the vertical coordinate of the first pixel to write
w	the width of the line to write, that is the number of values to write to the image line

Definition at line 79 of file pixdesc.c.

Referenced by filter_frame().

static enum AVPixelFormat get_pix_fmt_internal ( const char * name )

static

Definition at line 1665 of file pixdesc.c.

Referenced by av_get_pix_fmt().

const char* av_get_pix_fmt_name ( enum AVPixelFormat pix_fmt )

Return the short name for a pixel format, NULL in case pix_fmt is unknown.

See Also: av_get_pix_fmt(), av_get_pix_fmt_string()

Examples:: doc/examples/demuxing.c, and doc/examples/scaling_video.c.

Definition at line 1677 of file pixdesc.c.

Referenced by av_opt_get(), avcodec_default_reget_buffer(), avcodec_open2(), avcodec_string(), caca_write_header(), choose_pix_fmts(), choose_pixel_fmt(), config_input_overlay(), config_output(), config_props(), dc1394_read_common(), decode_video(), device_try_init(), dshow_cycle_formats(), dvvideo_init_encoder(), fbdev_read_header(), ff_dv_print_profiles(), ff_scale_image(), ff_tlog_link(), ff_yuv2packedX_altivec(), ff_yuv2rgb_get_func_ptr(), ff_yuv2rgb_get_func_ptr_bfin(), init_video(), libopenjpeg_encode_frame(), list_formats(), main(), mj2_create_image(), palToRgbWrapper(), pick_format(), planarRgbToRgbWrapper(), print_link_prop(), rgbToPlanarRgbWrapper(), rgbToRgbWrapper(), sdl_write_header(), show_frame(), show_stream(), sws_init_context(), targa_encode_frame(), and video_thread().

enum AVPixelFormat av_get_pix_fmt ( const char * name )

Return the pixel format corresponding to name.

If there is no pixel format with name name, then looks for a pixel format with the name corresponding to the native endian format of name. For example in a little-endian system, first looks for "gray16", then for "gray16le".

Finally if no pixel format has been found, returns AV_PIX_FMT_NONE.

Definition at line 1689 of file pixdesc.c.

Referenced by av_opt_set(), dc1394_read_common(), ff_parse_pixel_format(), fileTest(), img_read_header(), main(), new_video_stream(), rawvideo_read_header(), and v4l2_read_header().

int av_get_bits_per_pixel ( const AVPixFmtDescriptor * pixdesc )

Return the number of bits per pixel used by the pixel format described by pixdesc.

The returned number of bits refers to the number of bits actually used for storing the pixel information, that is padding bits are not counted.

Definition at line 1708 of file pixdesc.c.

Referenced by av_get_pix_fmt_string(), caca_write_header(), config_input(), config_props(), decode_frame(), encode_frame(), ff_fill_line_with_color(), raw_init_encoder(), show_pix_fmts(), sws_init_context(), sws_setColorspaceDetails(), targa_encode_frame(), and xwd_encode_frame().

int av_get_padded_bits_per_pixel ( const AVPixFmtDescriptor * pixdesc )

Return the number of bits per pixel for the pixel format described by pixdesc, including any padding or unused bits.

Definition at line 1721 of file pixdesc.c.

Referenced by avcodec_find_best_pix_fmt_of_2(), and lavfi_read_header().

char* av_get_pix_fmt_string	(	char *	buf,
		int	buf_size,
		enum AVPixelFormat	pix_fmt
	)

Print in buf the string corresponding to the pixel format with number pix_fmt, or an header if pix_fmt is negative.

Parameters

buf	the buffer where to write the string
buf_size	the size of buf
pix_fmt	the number of the pixel format to print the corresponding info string, or a negative value to print the corresponding header.

Definition at line 1741 of file pixdesc.c.

const AVPixFmtDescriptor* av_pix_fmt_desc_get ( enum AVPixelFormat pix_fmt )

Returns: a pixel format descriptor for provided pixel format or NULL if this pixel format is unknown.

Definition at line 1755 of file pixdesc.c.

Referenced by alloc_buffer(), av_image_alloc(), av_image_copy(), av_image_copy_to_buffer(), av_image_fill_linesizes(), av_image_fill_pointers(), av_image_get_buffer_size(), av_image_get_linesize(), av_picture_crop(), av_picture_pad(), av_pix_fmt_get_chroma_sub_sample(), avcodec_align_dimensions(), avcodec_find_best_pix_fmt_of_2(), avcodec_get_chroma_sub_sample(), avcodec_string(), avpriv_color_frame(), caca_write_header(), check_image_pointers(), choose_pixel_fmt(), config_input(), config_input_main(), config_input_overlay(), config_input_top(), config_out_props(), config_props(), config_props_output(), copy_picture_field(), create_all_formats(), decode_frame(), decode_slice(), decode_thread(), doTest(), encode_frame(), encode_init(), encode_slice(), ff_all_formats(), ff_draw_horiz_band(), ff_draw_init(), ff_fill_line_with_color(), ff_get_unscaled_swscale(), ff_h264_draw_horiz_band(), ff_merge_formats(), ff_MPV_frame_end(), ff_pnm_decode_header(), ff_sws_init_output_funcs(), filter_frame(), geq_config_props(), get_pix_fmt_depth(), get_pix_fmt_score(), getSubSampleFactors(), hScale16To15_c(), hScale16To19_c(), is16BPS(), is9_OR_10BPS(), is_hwaccel_pix_fmt(), isALPHA(), isBE(), isPackedRGB(), isPlanar(), isPlanarRGB(), isPlanarYUV(), isRGB(), isYUV(), lavfi_read_header(), libopenjpeg_decode_frame(), libopenjpeg_ispacked(), libopenjpeg_matches_pix_fmt(), main(), mj2_create_image(), pick_format(), planarCopyWrapper(), pnm_encode_frame(), print_digraph(), query_formats(), raw_decode(), raw_init_encoder(), rgbToRgbWrapper(), selfTest(), sws_format_name(), sws_init_context(), sws_setColorspaceDetails(), swScale(), targa_encode_frame(), usePal(), video_get_buffer(), write_header(), write_packet(), xwd_encode_frame(), and yuv2gbrp_full_X_c().

const AVPixFmtDescriptor* av_pix_fmt_desc_next ( const AVPixFmtDescriptor * prev )

Iterate over all pixel format descriptors known to libavutil.

Parameters

prev	previous descriptor. NULL to get the first descriptor.

Returns: next descriptor or NULL after the last descriptor

Definition at line 1762 of file pixdesc.c.

Referenced by show_pix_fmts().

enum AVPixelFormat av_pix_fmt_desc_get_id ( const AVPixFmtDescriptor * desc )

Returns: an AVPixelFormat id described by desc, or AV_PIX_FMT_NONE if desc is not a valid pointer to a pixel format descriptor.

Definition at line 1774 of file pixdesc.c.

Referenced by show_pix_fmts().

int av_pix_fmt_get_chroma_sub_sample	(	enum AVPixelFormat	pix_fmt,
		int *	h_shift,
		int *	v_shift
	)

Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.

See avcodec_get_chroma_sub_sample() for a function that asserts a valid pixel format instead of returning an error code. Its recommanded that you use avcodec_get_chroma_sub_sample unless you do check the return code!

Parameters

[in]	pix_fmt	the pixel format
[out]	h_shift	store log2_chroma_h
[out]	v_shift	store log2_chroma_w

Returns: 0 on success, AVERROR(ENOSYS) on invalid or unknown pixel format

Definition at line 1783 of file pixdesc.c.

Referenced by ff_MPV_frame_start(), h264_slice_header_init(), load_input_picture(), and video_get_buffer().

Variable Documentation

const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB]

Definition at line 130 of file pixdesc.c.

Referenced by av_pix_fmt_desc_get_id().

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation