All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Data Fields
AVPixFmtDescriptor Struct Reference

Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes of an image. More...

#include <pixdesc.h>

Data Fields

const char * name
uint8_t nb_components
 The number of components each pixel has, (1-4) More...
uint8_t log2_chroma_w
 Amount to shift the luma width right to find the chroma width. More...
uint8_t log2_chroma_h
 Amount to shift the luma height right to find the chroma height. More...
uint64_t flags
 Combination of AV_PIX_FMT_FLAG_... More...
AVComponentDescriptor comp [4]
 Parameters that describe how pixels are packed. More...
const char * alias
 Alternative comma-separated names. More...

Detailed Description

Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes of an image.

It also stores the subsampling factors and number of components.

This is separate of the colorspace (RGB, YCbCr, YPbPr, JPEG-style YUV and all the YUV variants) AVPixFmtDescriptor just stores how values are stored not what these values represent.

Definition at line 81 of file pixdesc.h.

Field Documentation

const char* AVPixFmtDescriptor::name
uint8_t AVPixFmtDescriptor::nb_components
uint8_t AVPixFmtDescriptor::log2_chroma_w
uint8_t AVPixFmtDescriptor::log2_chroma_h

Amount to shift the luma height right to find the chroma height.

For YV12 this is 1 for example. chroma_height= AV_CEIL_RSHIFT(luma_height, log2_chroma_h) The note above is needed to ensure rounding up. This value only refers to the chroma components.

Definition at line 101 of file pixdesc.h.

Referenced by av_get_bits_per_pixel(), av_get_padded_bits_per_pixel(), av_image_copy(), av_image_copy_to_buffer(), av_image_fill_pointers(), av_picture_crop(), av_picture_pad(), av_pix_fmt_get_chroma_sub_sample(), avcodec_align_dimensions2(), avcodec_get_chroma_sub_sample(), config_input(), config_input_main(), config_input_overlay(), config_input_ref(), config_out_props(), config_output(), config_props(), config_props_output(), copy_picture_field(), create_filtergraph(), draw_horiz_band(), encode_init(), ff_check_pixfmt_descriptors(), ff_choose_chroma_location(), ff_color_frame(), ff_draw_horiz_band(), ff_draw_init(), ff_h264_draw_horiz_band(), ff_hevc_output_frame(), ff_opencl_deshake_process_inout_buf(), ff_sws_alphablendaway(), ff_video_frame_pool_init(), ffprobe_show_pixel_formats(), fill_picture_parameters(), filter(), filter_frame(), frame_end(), geq_config_props(), get_aspect_ratio(), get_pix_fmt_score(), get_video_buffer(), horizontal_frame_pack(), libopenjpeg_matches_pix_fmt(), map_pixel_format(), mj2_create_image(), opengl_get_plane_pointer(), opengl_init_context(), output_frame(), output_single_frame(), pix_fmt_match(), process_frame(), query_formats(), shuffleplanes_config_input(), smv_img_pnt(), smvjpeg_decode_frame(), utvideo_encode_init(), vaapi_build_decoder_config(), verify_md5(), vertical_frame_pack(), video_frame_cksum(), and write_packet().

uint64_t AVPixFmtDescriptor::flags
AVComponentDescriptor AVPixFmtDescriptor::comp[4]

Parameters that describe how pixels are packed.

If the format has 1 or 2 components, then luma is 0. If the format has 3 or 4 components: if the RGB flag is set then 0 is red, 1 is green and 2 is blue; otherwise 0 is luma, 1 is chroma-U and 2 is chroma-V.

If present, the Alpha channel is always the last component.

Definition at line 117 of file pixdesc.h.

Referenced by acolor(), acolor16(), aflat(), aflat16(), av_get_bits_per_pixel(), av_get_padded_bits_per_pixel(), av_image_copy(), av_image_copy_to_buffer(), av_image_fill_max_pixsteps(), av_image_fill_pointers(), av_pix_fmt_count_planes(), av_read_image_line(), av_write_image_line(), avcodec_open2(), avcodec_string(), check_image_pointers(), chroma(), chroma16(), color(), color16(), config_input(), config_input_ref(), config_output(), config_props(), create_filtergraph(), decode_frame(), decode_slice(), encode_frame(), encode_init(), encode_slice(), ff_blend_mask(), ff_blend_rectangle(), ff_bwdif_init_x86(), ff_check_pixfmt_descriptors(), ff_color_frame(), ff_draw_color(), ff_draw_init(), ff_fill_rectangle(), ff_hevc_output_frame(), ff_llviddsp_init_x86(), ff_mjpeg_decode_frame(), ff_sws_alphablendaway(), ff_sws_init_output_funcs(), ff_yadif_init_x86(), ffprobe_show_pixel_formats(), fill_picture_parameters(), filter_frame(), filter_slice(), flat(), get_bit_depth(), get_pix_fmt_depth(), get_pix_fmt_score(), hScale16To15_c(), hScale16To19_c(), is16BPS(), is9_OR_10BPS(), is_planar_yuv(), is_yuv_planar(), libopenjpeg_copy_to_packed16(), libopenjpeg_copyto16(), libopenjpeg_decode_frame(), libopenjpeg_ispacked(), libopenjpeg_matches_pix_fmt(), libx265_encode_frame(), libx265_encode_init(), lowpass16(), mj2_create_image(), mxf_write_header(), opengl_get_plane_pointer(), pick_color(), pix_fmt_match(), planarCopyWrapper(), planarRgb16ToRgb16Wrapper(), pnm_encode_frame(), query_formats(), reverse_color(), Rgb16ToPlanarRgb16Wrapper(), smv_img_pnt(), sws_init_context(), swscale(), vc2_encode_init(), verify_md5(), write_packet(), and yuv2gbrp_full_X_c().

const char* AVPixFmtDescriptor::alias

Alternative comma-separated names.

Definition at line 122 of file pixdesc.h.

The documentation for this struct was generated from the following file: