ffmpeg / libavcodec / imgconvert.c @ a80f74c5
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/*
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* Misc image conversion routines
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* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* misc image conversion routines
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*/
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/* TODO:
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* - write 'ffimg' program to test all the image related stuff
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* - move all api to slice based system
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* - integrate deinterlacing, postprocessing and scaling in the conversion process
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*/
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "internal.h" |
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#include "imgconvert.h" |
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#include "libavutil/colorspace.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/imgutils.h" |
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#if HAVE_MMX && HAVE_YASM
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#include "x86/dsputil_mmx.h" |
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#endif
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#define xglue(x, y) x ## y |
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#define glue(x, y) xglue(x, y)
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#define FF_COLOR_RGB 0 /**< RGB color space */ |
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#define FF_COLOR_GRAY 1 /**< gray color space */ |
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#define FF_COLOR_YUV 2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */ |
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#define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */ |
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#define FF_PIXEL_PLANAR 0 /**< each channel has one component in AVPicture */ |
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#define FF_PIXEL_PACKED 1 /**< only one components containing all the channels */ |
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#define FF_PIXEL_PALETTE 2 /**< one components containing indexes for a palette */ |
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#if HAVE_MMX && HAVE_YASM
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#define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
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#define deinterlace_line ff_deinterlace_line_mmx
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#else
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#define deinterlace_line_inplace deinterlace_line_inplace_c
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#define deinterlace_line deinterlace_line_c
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#endif
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typedef struct PixFmtInfo { |
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uint8_t nb_channels; /**< number of channels (including alpha) */
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uint8_t color_type; /**< color type (see FF_COLOR_xxx constants) */
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uint8_t pixel_type; /**< pixel storage type (see FF_PIXEL_xxx constants) */
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uint8_t is_alpha : 1; /**< true if alpha can be specified */ |
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uint8_t depth; /**< bit depth of the color components */
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} PixFmtInfo; |
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/* this table gives more information about formats */
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static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = { |
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/* YUV formats */
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[PIX_FMT_YUV420P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUV422P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUV444P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUYV422] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_UYVY422] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_YUV410P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUV411P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUV440P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUV420P16LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_YUV422P16LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_YUV444P16LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_YUV420P16BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_YUV422P16BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_YUV444P16BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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/* YUV formats with alpha plane */
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[PIX_FMT_YUVA420P] = { |
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.nb_channels = 4,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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/* JPEG YUV */
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[PIX_FMT_YUVJ420P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV_JPEG, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUVJ422P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV_JPEG, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUVJ444P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV_JPEG, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_YUVJ440P] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_YUV_JPEG, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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/* RGB formats */
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[PIX_FMT_RGB24] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_BGR24] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_ARGB] = { |
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.nb_channels = 4, .is_alpha = 1, |
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_RGB48BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 16,
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}, |
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[PIX_FMT_RGB48LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 16,
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}, |
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[PIX_FMT_RGB565BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_RGB565LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_RGB555BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_RGB555LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_RGB444BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 4,
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}, |
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[PIX_FMT_RGB444LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 4,
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}, |
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/* gray / mono formats */
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[PIX_FMT_GRAY16BE] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_GRAY, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_GRAY16LE] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_GRAY, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 16,
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}, |
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[PIX_FMT_GRAY8] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_GRAY, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_MONOWHITE] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_GRAY, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 1,
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}, |
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[PIX_FMT_MONOBLACK] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_GRAY, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 1,
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}, |
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/* paletted formats */
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[PIX_FMT_PAL8] = { |
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.nb_channels = 4, .is_alpha = 1, |
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PALETTE, |
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.depth = 8,
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}, |
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[PIX_FMT_UYYVYY411] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_ABGR] = { |
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.nb_channels = 4, .is_alpha = 1, |
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_BGR565BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_BGR565LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_BGR555BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_BGR555LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 5,
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}, |
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[PIX_FMT_BGR444BE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 4,
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}, |
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[PIX_FMT_BGR444LE] = { |
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.nb_channels = 3,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 4,
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}, |
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[PIX_FMT_RGB8] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_RGB4] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 4,
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}, |
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[PIX_FMT_RGB4_BYTE] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_BGR8] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_BGR4] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 4,
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}, |
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[PIX_FMT_BGR4_BYTE] = { |
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.nb_channels = 1,
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_NV12] = { |
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.nb_channels = 2,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_NV21] = { |
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.nb_channels = 2,
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.color_type = FF_COLOR_YUV, |
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.pixel_type = FF_PIXEL_PLANAR, |
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.depth = 8,
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}, |
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[PIX_FMT_BGRA] = { |
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.nb_channels = 4, .is_alpha = 1, |
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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[PIX_FMT_RGBA] = { |
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.nb_channels = 4, .is_alpha = 1, |
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.color_type = FF_COLOR_RGB, |
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.pixel_type = FF_PIXEL_PACKED, |
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.depth = 8,
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}, |
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}; |
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void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift) |
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{ |
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*h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w; |
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*v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h; |
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} |
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const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt) |
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{ |
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if ((unsigned)pix_fmt >= PIX_FMT_NB) |
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return NULL; |
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else
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return av_pix_fmt_descriptors[pix_fmt].name;
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} |
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int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt) |
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{ |
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return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
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} |
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int avpicture_fill(AVPicture *picture, uint8_t *ptr,
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enum PixelFormat pix_fmt, int width, int height) |
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{ |
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int ret;
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if ((ret = av_image_check_size(width, height, 0, NULL)) < 0) |
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return ret;
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if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0) |
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return ret;
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return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
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} |
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int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height, |
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unsigned char *dest, int dest_size) |
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{ |
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int i, j, nb_planes = 0, linesizes[4]; |
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const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
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int size = avpicture_get_size(pix_fmt, width, height);
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if (size > dest_size || size < 0) |
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return AVERROR(EINVAL);
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for (i = 0; i < desc->nb_components; i++) |
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nb_planes = FFMAX(desc->comp[i].plane, nb_planes); |
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nb_planes++; |
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av_image_fill_linesizes(linesizes, pix_fmt, width); |
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for (i = 0; i < nb_planes; i++) { |
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int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; |
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const unsigned char *s = src->data[i]; |
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h = (height + (1 << shift) - 1) >> shift; |
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for (j = 0; j < h; j++) { |
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memcpy(dest, s, linesizes[i]); |
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dest += linesizes[i]; |
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s += src->linesize[i]; |
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} |
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} |
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if (desc->flags & PIX_FMT_PAL)
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memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4); |
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return size;
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} |
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|
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int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height) |
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{ |
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AVPicture dummy_pict; |
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if(av_image_check_size(width, height, 0, NULL)) |
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return -1; |
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switch (pix_fmt) {
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case PIX_FMT_RGB8:
|
487 |
case PIX_FMT_BGR8:
|
488 |
case PIX_FMT_RGB4_BYTE:
|
489 |
case PIX_FMT_BGR4_BYTE:
|
490 |
case PIX_FMT_GRAY8:
|
491 |
// do not include palette for these pseudo-paletted formats
|
492 |
return width * height;
|
493 |
} |
494 |
return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height); |
495 |
} |
496 |
|
497 |
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt, |
498 |
int has_alpha)
|
499 |
{ |
500 |
const PixFmtInfo *pf, *ps;
|
501 |
const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
|
502 |
const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
|
503 |
int loss;
|
504 |
|
505 |
ps = &pix_fmt_info[src_pix_fmt]; |
506 |
|
507 |
/* compute loss */
|
508 |
loss = 0;
|
509 |
pf = &pix_fmt_info[dst_pix_fmt]; |
510 |
if (pf->depth < ps->depth ||
|
511 |
((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE || |
512 |
dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) && |
513 |
(src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE || |
514 |
src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE))) |
515 |
loss |= FF_LOSS_DEPTH; |
516 |
if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
|
517 |
dst_desc->log2_chroma_h > src_desc->log2_chroma_h) |
518 |
loss |= FF_LOSS_RESOLUTION; |
519 |
switch(pf->color_type) {
|
520 |
case FF_COLOR_RGB:
|
521 |
if (ps->color_type != FF_COLOR_RGB &&
|
522 |
ps->color_type != FF_COLOR_GRAY) |
523 |
loss |= FF_LOSS_COLORSPACE; |
524 |
break;
|
525 |
case FF_COLOR_GRAY:
|
526 |
if (ps->color_type != FF_COLOR_GRAY)
|
527 |
loss |= FF_LOSS_COLORSPACE; |
528 |
break;
|
529 |
case FF_COLOR_YUV:
|
530 |
if (ps->color_type != FF_COLOR_YUV)
|
531 |
loss |= FF_LOSS_COLORSPACE; |
532 |
break;
|
533 |
case FF_COLOR_YUV_JPEG:
|
534 |
if (ps->color_type != FF_COLOR_YUV_JPEG &&
|
535 |
ps->color_type != FF_COLOR_YUV && |
536 |
ps->color_type != FF_COLOR_GRAY) |
537 |
loss |= FF_LOSS_COLORSPACE; |
538 |
break;
|
539 |
default:
|
540 |
/* fail safe test */
|
541 |
if (ps->color_type != pf->color_type)
|
542 |
loss |= FF_LOSS_COLORSPACE; |
543 |
break;
|
544 |
} |
545 |
if (pf->color_type == FF_COLOR_GRAY &&
|
546 |
ps->color_type != FF_COLOR_GRAY) |
547 |
loss |= FF_LOSS_CHROMA; |
548 |
if (!pf->is_alpha && (ps->is_alpha && has_alpha))
|
549 |
loss |= FF_LOSS_ALPHA; |
550 |
if (pf->pixel_type == FF_PIXEL_PALETTE &&
|
551 |
(ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY)) |
552 |
loss |= FF_LOSS_COLORQUANT; |
553 |
return loss;
|
554 |
} |
555 |
|
556 |
static int avg_bits_per_pixel(enum PixelFormat pix_fmt) |
557 |
{ |
558 |
int bits;
|
559 |
const PixFmtInfo *pf;
|
560 |
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
|
561 |
|
562 |
pf = &pix_fmt_info[pix_fmt]; |
563 |
switch(pf->pixel_type) {
|
564 |
case FF_PIXEL_PACKED:
|
565 |
switch(pix_fmt) {
|
566 |
case PIX_FMT_YUYV422:
|
567 |
case PIX_FMT_UYVY422:
|
568 |
case PIX_FMT_RGB565BE:
|
569 |
case PIX_FMT_RGB565LE:
|
570 |
case PIX_FMT_RGB555BE:
|
571 |
case PIX_FMT_RGB555LE:
|
572 |
case PIX_FMT_RGB444BE:
|
573 |
case PIX_FMT_RGB444LE:
|
574 |
case PIX_FMT_BGR565BE:
|
575 |
case PIX_FMT_BGR565LE:
|
576 |
case PIX_FMT_BGR555BE:
|
577 |
case PIX_FMT_BGR555LE:
|
578 |
case PIX_FMT_BGR444BE:
|
579 |
case PIX_FMT_BGR444LE:
|
580 |
bits = 16;
|
581 |
break;
|
582 |
case PIX_FMT_UYYVYY411:
|
583 |
bits = 12;
|
584 |
break;
|
585 |
default:
|
586 |
bits = pf->depth * pf->nb_channels; |
587 |
break;
|
588 |
} |
589 |
break;
|
590 |
case FF_PIXEL_PLANAR:
|
591 |
if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) { |
592 |
bits = pf->depth * pf->nb_channels; |
593 |
} else {
|
594 |
bits = pf->depth + ((2 * pf->depth) >>
|
595 |
(desc->log2_chroma_w + desc->log2_chroma_h)); |
596 |
} |
597 |
break;
|
598 |
case FF_PIXEL_PALETTE:
|
599 |
bits = 8;
|
600 |
break;
|
601 |
default:
|
602 |
bits = -1;
|
603 |
break;
|
604 |
} |
605 |
return bits;
|
606 |
} |
607 |
|
608 |
static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask, |
609 |
enum PixelFormat src_pix_fmt,
|
610 |
int has_alpha,
|
611 |
int loss_mask)
|
612 |
{ |
613 |
int dist, i, loss, min_dist;
|
614 |
enum PixelFormat dst_pix_fmt;
|
615 |
|
616 |
/* find exact color match with smallest size */
|
617 |
dst_pix_fmt = PIX_FMT_NONE; |
618 |
min_dist = 0x7fffffff;
|
619 |
for(i = 0;i < PIX_FMT_NB; i++) { |
620 |
if (pix_fmt_mask & (1ULL << i)) { |
621 |
loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask; |
622 |
if (loss == 0) { |
623 |
dist = avg_bits_per_pixel(i); |
624 |
if (dist < min_dist) {
|
625 |
min_dist = dist; |
626 |
dst_pix_fmt = i; |
627 |
} |
628 |
} |
629 |
} |
630 |
} |
631 |
return dst_pix_fmt;
|
632 |
} |
633 |
|
634 |
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt, |
635 |
int has_alpha, int *loss_ptr) |
636 |
{ |
637 |
enum PixelFormat dst_pix_fmt;
|
638 |
int loss_mask, i;
|
639 |
static const int loss_mask_order[] = { |
640 |
~0, /* no loss first */ |
641 |
~FF_LOSS_ALPHA, |
642 |
~FF_LOSS_RESOLUTION, |
643 |
~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION), |
644 |
~FF_LOSS_COLORQUANT, |
645 |
~FF_LOSS_DEPTH, |
646 |
0,
|
647 |
}; |
648 |
|
649 |
/* try with successive loss */
|
650 |
i = 0;
|
651 |
for(;;) {
|
652 |
loss_mask = loss_mask_order[i++]; |
653 |
dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt, |
654 |
has_alpha, loss_mask); |
655 |
if (dst_pix_fmt >= 0) |
656 |
goto found;
|
657 |
if (loss_mask == 0) |
658 |
break;
|
659 |
} |
660 |
return PIX_FMT_NONE;
|
661 |
found:
|
662 |
if (loss_ptr)
|
663 |
*loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha); |
664 |
return dst_pix_fmt;
|
665 |
} |
666 |
|
667 |
void av_picture_copy(AVPicture *dst, const AVPicture *src, |
668 |
enum PixelFormat pix_fmt, int width, int height) |
669 |
{ |
670 |
av_image_copy(dst->data, dst->linesize, src->data, |
671 |
src->linesize, pix_fmt, width, height); |
672 |
} |
673 |
|
674 |
/* 2x2 -> 1x1 */
|
675 |
void ff_shrink22(uint8_t *dst, int dst_wrap, |
676 |
const uint8_t *src, int src_wrap, |
677 |
int width, int height) |
678 |
{ |
679 |
int w;
|
680 |
const uint8_t *s1, *s2;
|
681 |
uint8_t *d; |
682 |
|
683 |
for(;height > 0; height--) { |
684 |
s1 = src; |
685 |
s2 = s1 + src_wrap; |
686 |
d = dst; |
687 |
for(w = width;w >= 4; w-=4) { |
688 |
d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; |
689 |
d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2; |
690 |
d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2; |
691 |
d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2; |
692 |
s1 += 8;
|
693 |
s2 += 8;
|
694 |
d += 4;
|
695 |
} |
696 |
for(;w > 0; w--) { |
697 |
d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; |
698 |
s1 += 2;
|
699 |
s2 += 2;
|
700 |
d++; |
701 |
} |
702 |
src += 2 * src_wrap;
|
703 |
dst += dst_wrap; |
704 |
} |
705 |
} |
706 |
|
707 |
/* 4x4 -> 1x1 */
|
708 |
void ff_shrink44(uint8_t *dst, int dst_wrap, |
709 |
const uint8_t *src, int src_wrap, |
710 |
int width, int height) |
711 |
{ |
712 |
int w;
|
713 |
const uint8_t *s1, *s2, *s3, *s4;
|
714 |
uint8_t *d; |
715 |
|
716 |
for(;height > 0; height--) { |
717 |
s1 = src; |
718 |
s2 = s1 + src_wrap; |
719 |
s3 = s2 + src_wrap; |
720 |
s4 = s3 + src_wrap; |
721 |
d = dst; |
722 |
for(w = width;w > 0; w--) { |
723 |
d[0] = (s1[0] + s1[1] + s1[2] + s1[3] + |
724 |
s2[0] + s2[1] + s2[2] + s2[3] + |
725 |
s3[0] + s3[1] + s3[2] + s3[3] + |
726 |
s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4; |
727 |
s1 += 4;
|
728 |
s2 += 4;
|
729 |
s3 += 4;
|
730 |
s4 += 4;
|
731 |
d++; |
732 |
} |
733 |
src += 4 * src_wrap;
|
734 |
dst += dst_wrap; |
735 |
} |
736 |
} |
737 |
|
738 |
/* 8x8 -> 1x1 */
|
739 |
void ff_shrink88(uint8_t *dst, int dst_wrap, |
740 |
const uint8_t *src, int src_wrap, |
741 |
int width, int height) |
742 |
{ |
743 |
int w, i;
|
744 |
|
745 |
for(;height > 0; height--) { |
746 |
for(w = width;w > 0; w--) { |
747 |
int tmp=0; |
748 |
for(i=0; i<8; i++){ |
749 |
tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7]; |
750 |
src += src_wrap; |
751 |
} |
752 |
*(dst++) = (tmp + 32)>>6; |
753 |
src += 8 - 8*src_wrap; |
754 |
} |
755 |
src += 8*src_wrap - 8*width; |
756 |
dst += dst_wrap - width; |
757 |
} |
758 |
} |
759 |
|
760 |
|
761 |
int avpicture_alloc(AVPicture *picture,
|
762 |
enum PixelFormat pix_fmt, int width, int height) |
763 |
{ |
764 |
int ret;
|
765 |
|
766 |
if ((ret = av_image_alloc(picture->data, picture->linesize, width, height, pix_fmt, 1)) < 0) { |
767 |
memset(picture, 0, sizeof(AVPicture)); |
768 |
return ret;
|
769 |
} |
770 |
|
771 |
return 0; |
772 |
} |
773 |
|
774 |
void avpicture_free(AVPicture *picture)
|
775 |
{ |
776 |
av_free(picture->data[0]);
|
777 |
} |
778 |
|
779 |
/* return true if yuv planar */
|
780 |
static inline int is_yuv_planar(const PixFmtInfo *ps) |
781 |
{ |
782 |
return (ps->color_type == FF_COLOR_YUV ||
|
783 |
ps->color_type == FF_COLOR_YUV_JPEG) && |
784 |
ps->pixel_type == FF_PIXEL_PLANAR; |
785 |
} |
786 |
|
787 |
int av_picture_crop(AVPicture *dst, const AVPicture *src, |
788 |
enum PixelFormat pix_fmt, int top_band, int left_band) |
789 |
{ |
790 |
int y_shift;
|
791 |
int x_shift;
|
792 |
|
793 |
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB) |
794 |
return -1; |
795 |
|
796 |
y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h; |
797 |
x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w; |
798 |
|
799 |
if (is_yuv_planar(&pix_fmt_info[pix_fmt])) {
|
800 |
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; |
801 |
dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift); |
802 |
dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift); |
803 |
} else{
|
804 |
if(top_band % (1<<y_shift) || left_band % (1<<x_shift)) |
805 |
return -1; |
806 |
if(left_band) //FIXME add support for this too |
807 |
return -1; |
808 |
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; |
809 |
} |
810 |
|
811 |
dst->linesize[0] = src->linesize[0]; |
812 |
dst->linesize[1] = src->linesize[1]; |
813 |
dst->linesize[2] = src->linesize[2]; |
814 |
return 0; |
815 |
} |
816 |
|
817 |
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, |
818 |
enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, |
819 |
int *color)
|
820 |
{ |
821 |
uint8_t *optr; |
822 |
int y_shift;
|
823 |
int x_shift;
|
824 |
int yheight;
|
825 |
int i, y;
|
826 |
|
827 |
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || |
828 |
!is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1; |
829 |
|
830 |
for (i = 0; i < 3; i++) { |
831 |
x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
|
832 |
y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
|
833 |
|
834 |
if (padtop || padleft) {
|
835 |
memset(dst->data[i], color[i], |
836 |
dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift)); |
837 |
} |
838 |
|
839 |
if (padleft || padright) {
|
840 |
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + |
841 |
(dst->linesize[i] - (padright >> x_shift)); |
842 |
yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
|
843 |
for (y = 0; y < yheight; y++) { |
844 |
memset(optr, color[i], (padleft + padright) >> x_shift); |
845 |
optr += dst->linesize[i]; |
846 |
} |
847 |
} |
848 |
|
849 |
if (src) { /* first line */ |
850 |
uint8_t *iptr = src->data[i]; |
851 |
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + |
852 |
(padleft >> x_shift); |
853 |
memcpy(optr, iptr, (width - padleft - padright) >> x_shift); |
854 |
iptr += src->linesize[i]; |
855 |
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + |
856 |
(dst->linesize[i] - (padright >> x_shift)); |
857 |
yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
|
858 |
for (y = 0; y < yheight; y++) { |
859 |
memset(optr, color[i], (padleft + padright) >> x_shift); |
860 |
memcpy(optr + ((padleft + padright) >> x_shift), iptr, |
861 |
(width - padleft - padright) >> x_shift); |
862 |
iptr += src->linesize[i]; |
863 |
optr += dst->linesize[i]; |
864 |
} |
865 |
} |
866 |
|
867 |
if (padbottom || padright) {
|
868 |
optr = dst->data[i] + dst->linesize[i] * |
869 |
((height - padbottom) >> y_shift) - (padright >> x_shift); |
870 |
memset(optr, color[i],dst->linesize[i] * |
871 |
(padbottom >> y_shift) + (padright >> x_shift)); |
872 |
} |
873 |
} |
874 |
return 0; |
875 |
} |
876 |
|
877 |
/* NOTE: we scan all the pixels to have an exact information */
|
878 |
static int get_alpha_info_pal8(const AVPicture *src, int width, int height) |
879 |
{ |
880 |
const unsigned char *p; |
881 |
int src_wrap, ret, x, y;
|
882 |
unsigned int a; |
883 |
uint32_t *palette = (uint32_t *)src->data[1];
|
884 |
|
885 |
p = src->data[0];
|
886 |
src_wrap = src->linesize[0] - width;
|
887 |
ret = 0;
|
888 |
for(y=0;y<height;y++) { |
889 |
for(x=0;x<width;x++) { |
890 |
a = palette[p[0]] >> 24; |
891 |
if (a == 0x00) { |
892 |
ret |= FF_ALPHA_TRANSP; |
893 |
} else if (a != 0xff) { |
894 |
ret |= FF_ALPHA_SEMI_TRANSP; |
895 |
} |
896 |
p++; |
897 |
} |
898 |
p += src_wrap; |
899 |
} |
900 |
return ret;
|
901 |
} |
902 |
|
903 |
int img_get_alpha_info(const AVPicture *src, |
904 |
enum PixelFormat pix_fmt, int width, int height) |
905 |
{ |
906 |
const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
|
907 |
int ret;
|
908 |
|
909 |
/* no alpha can be represented in format */
|
910 |
if (!pf->is_alpha)
|
911 |
return 0; |
912 |
switch(pix_fmt) {
|
913 |
case PIX_FMT_PAL8:
|
914 |
ret = get_alpha_info_pal8(src, width, height); |
915 |
break;
|
916 |
default:
|
917 |
/* we do not know, so everything is indicated */
|
918 |
ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP; |
919 |
break;
|
920 |
} |
921 |
return ret;
|
922 |
} |
923 |
|
924 |
#if !(HAVE_MMX && HAVE_YASM)
|
925 |
/* filter parameters: [-1 4 2 4 -1] // 8 */
|
926 |
static void deinterlace_line_c(uint8_t *dst, |
927 |
const uint8_t *lum_m4, const uint8_t *lum_m3, |
928 |
const uint8_t *lum_m2, const uint8_t *lum_m1, |
929 |
const uint8_t *lum,
|
930 |
int size)
|
931 |
{ |
932 |
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
933 |
int sum;
|
934 |
|
935 |
for(;size > 0;size--) { |
936 |
sum = -lum_m4[0];
|
937 |
sum += lum_m3[0] << 2; |
938 |
sum += lum_m2[0] << 1; |
939 |
sum += lum_m1[0] << 2; |
940 |
sum += -lum[0];
|
941 |
dst[0] = cm[(sum + 4) >> 3]; |
942 |
lum_m4++; |
943 |
lum_m3++; |
944 |
lum_m2++; |
945 |
lum_m1++; |
946 |
lum++; |
947 |
dst++; |
948 |
} |
949 |
} |
950 |
|
951 |
static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3, |
952 |
uint8_t *lum_m2, uint8_t *lum_m1, |
953 |
uint8_t *lum, int size)
|
954 |
{ |
955 |
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
956 |
int sum;
|
957 |
|
958 |
for(;size > 0;size--) { |
959 |
sum = -lum_m4[0];
|
960 |
sum += lum_m3[0] << 2; |
961 |
sum += lum_m2[0] << 1; |
962 |
lum_m4[0]=lum_m2[0]; |
963 |
sum += lum_m1[0] << 2; |
964 |
sum += -lum[0];
|
965 |
lum_m2[0] = cm[(sum + 4) >> 3]; |
966 |
lum_m4++; |
967 |
lum_m3++; |
968 |
lum_m2++; |
969 |
lum_m1++; |
970 |
lum++; |
971 |
} |
972 |
} |
973 |
#endif
|
974 |
|
975 |
/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
|
976 |
top field is copied as is, but the bottom field is deinterlaced
|
977 |
against the top field. */
|
978 |
static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap, |
979 |
const uint8_t *src1, int src_wrap, |
980 |
int width, int height) |
981 |
{ |
982 |
const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
|
983 |
int y;
|
984 |
|
985 |
src_m2 = src1; |
986 |
src_m1 = src1; |
987 |
src_0=&src_m1[src_wrap]; |
988 |
src_p1=&src_0[src_wrap]; |
989 |
src_p2=&src_p1[src_wrap]; |
990 |
for(y=0;y<(height-2);y+=2) { |
991 |
memcpy(dst,src_m1,width); |
992 |
dst += dst_wrap; |
993 |
deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width); |
994 |
src_m2 = src_0; |
995 |
src_m1 = src_p1; |
996 |
src_0 = src_p2; |
997 |
src_p1 += 2*src_wrap;
|
998 |
src_p2 += 2*src_wrap;
|
999 |
dst += dst_wrap; |
1000 |
} |
1001 |
memcpy(dst,src_m1,width); |
1002 |
dst += dst_wrap; |
1003 |
/* do last line */
|
1004 |
deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width); |
1005 |
} |
1006 |
|
1007 |
static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap, |
1008 |
int width, int height) |
1009 |
{ |
1010 |
uint8_t *src_m1, *src_0, *src_p1, *src_p2; |
1011 |
int y;
|
1012 |
uint8_t *buf; |
1013 |
buf = (uint8_t*)av_malloc(width); |
1014 |
|
1015 |
src_m1 = src1; |
1016 |
memcpy(buf,src_m1,width); |
1017 |
src_0=&src_m1[src_wrap]; |
1018 |
src_p1=&src_0[src_wrap]; |
1019 |
src_p2=&src_p1[src_wrap]; |
1020 |
for(y=0;y<(height-2);y+=2) { |
1021 |
deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width); |
1022 |
src_m1 = src_p1; |
1023 |
src_0 = src_p2; |
1024 |
src_p1 += 2*src_wrap;
|
1025 |
src_p2 += 2*src_wrap;
|
1026 |
} |
1027 |
/* do last line */
|
1028 |
deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width); |
1029 |
av_free(buf); |
1030 |
} |
1031 |
|
1032 |
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, |
1033 |
enum PixelFormat pix_fmt, int width, int height) |
1034 |
{ |
1035 |
int i;
|
1036 |
|
1037 |
if (pix_fmt != PIX_FMT_YUV420P &&
|
1038 |
pix_fmt != PIX_FMT_YUVJ420P && |
1039 |
pix_fmt != PIX_FMT_YUV422P && |
1040 |
pix_fmt != PIX_FMT_YUVJ422P && |
1041 |
pix_fmt != PIX_FMT_YUV444P && |
1042 |
pix_fmt != PIX_FMT_YUV411P && |
1043 |
pix_fmt != PIX_FMT_GRAY8) |
1044 |
return -1; |
1045 |
if ((width & 3) != 0 || (height & 3) != 0) |
1046 |
return -1; |
1047 |
|
1048 |
for(i=0;i<3;i++) { |
1049 |
if (i == 1) { |
1050 |
switch(pix_fmt) {
|
1051 |
case PIX_FMT_YUVJ420P:
|
1052 |
case PIX_FMT_YUV420P:
|
1053 |
width >>= 1;
|
1054 |
height >>= 1;
|
1055 |
break;
|
1056 |
case PIX_FMT_YUV422P:
|
1057 |
case PIX_FMT_YUVJ422P:
|
1058 |
width >>= 1;
|
1059 |
break;
|
1060 |
case PIX_FMT_YUV411P:
|
1061 |
width >>= 2;
|
1062 |
break;
|
1063 |
default:
|
1064 |
break;
|
1065 |
} |
1066 |
if (pix_fmt == PIX_FMT_GRAY8) {
|
1067 |
break;
|
1068 |
} |
1069 |
} |
1070 |
if (src == dst) {
|
1071 |
deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i], |
1072 |
width, height); |
1073 |
} else {
|
1074 |
deinterlace_bottom_field(dst->data[i],dst->linesize[i], |
1075 |
src->data[i], src->linesize[i], |
1076 |
width, height); |
1077 |
} |
1078 |
} |
1079 |
emms_c(); |
1080 |
return 0; |
1081 |
} |
1082 |
|