mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-25 19:01:51 +02:00
734 lines
27 KiB
C
734 lines
27 KiB
C
/*
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* Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it>
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* Copyright 2012 Nicolas George <nicolas.george normalesup org>
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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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#include <string.h>
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#include "libavutil/avassert.h"
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#include "libavutil/avutil.h"
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#include "libavutil/colorspace.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "libavutil/pixdesc.h"
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#include "drawutils.h"
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#include "formats.h"
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enum { RED = 0, GREEN, BLUE, ALPHA };
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int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
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{
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switch (pix_fmt) {
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case AV_PIX_FMT_0RGB:
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case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
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case AV_PIX_FMT_0BGR:
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case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
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case AV_PIX_FMT_RGB48LE:
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case AV_PIX_FMT_RGB48BE:
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case AV_PIX_FMT_RGBA64BE:
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case AV_PIX_FMT_RGBA64LE:
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case AV_PIX_FMT_RGB0:
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case AV_PIX_FMT_RGBA:
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case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
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case AV_PIX_FMT_BGR48LE:
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case AV_PIX_FMT_BGR48BE:
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case AV_PIX_FMT_BGRA64BE:
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case AV_PIX_FMT_BGRA64LE:
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case AV_PIX_FMT_BGRA:
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case AV_PIX_FMT_BGR0:
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case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
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case AV_PIX_FMT_GBRP9LE:
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case AV_PIX_FMT_GBRP9BE:
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case AV_PIX_FMT_GBRP10LE:
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case AV_PIX_FMT_GBRP10BE:
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case AV_PIX_FMT_GBRP12LE:
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case AV_PIX_FMT_GBRP12BE:
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case AV_PIX_FMT_GBRP14LE:
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case AV_PIX_FMT_GBRP14BE:
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case AV_PIX_FMT_GBRP16LE:
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case AV_PIX_FMT_GBRP16BE:
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case AV_PIX_FMT_GBRAP:
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case AV_PIX_FMT_GBRAP12LE:
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case AV_PIX_FMT_GBRAP12BE:
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case AV_PIX_FMT_GBRAP16LE:
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case AV_PIX_FMT_GBRAP16BE:
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case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
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default: /* unsupported */
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return AVERROR(EINVAL);
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}
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return 0;
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}
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int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
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enum AVPixelFormat pix_fmt, uint8_t rgba_color[4],
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int *is_packed_rgba, uint8_t rgba_map_ptr[4])
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{
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uint8_t rgba_map[4] = {0};
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int i;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);
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int hsub;
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av_assert0(pix_desc);
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hsub = pix_desc->log2_chroma_w;
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*is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
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if (*is_packed_rgba) {
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pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
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for (i = 0; i < 4; i++)
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dst_color[rgba_map[i]] = rgba_color[i];
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line[0] = av_malloc_array(w, pixel_step[0]);
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if (!line[0])
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return AVERROR(ENOMEM);
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for (i = 0; i < w; i++)
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memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
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if (rgba_map_ptr)
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memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
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} else {
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int plane;
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dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
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dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
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dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
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dst_color[3] = rgba_color[3];
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for (plane = 0; plane < 4; plane++) {
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int line_size;
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int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
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pixel_step[plane] = 1;
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line_size = AV_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];
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line[plane] = av_malloc(line_size);
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if (!line[plane]) {
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while(plane && line[plane-1])
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av_freep(&line[--plane]);
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return AVERROR(ENOMEM);
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}
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memset(line[plane], dst_color[plane], line_size);
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}
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}
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return 0;
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}
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void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int pixelstep[4],
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int hsub, int vsub, int x, int y, int w, int h)
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{
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int i, plane;
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uint8_t *p;
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for (plane = 0; plane < 4 && dst[plane]; plane++) {
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int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
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int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
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int width = AV_CEIL_RSHIFT(w, hsub1);
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int height = AV_CEIL_RSHIFT(h, vsub1);
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p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
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for (i = 0; i < height; i++) {
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memcpy(p + (x >> hsub1) * pixelstep[plane],
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src[plane], width * pixelstep[plane]);
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p += dst_linesize[plane];
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}
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}
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}
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void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int src_linesize[4], int pixelstep[4],
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int hsub, int vsub, int x, int y, int y2, int w, int h)
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{
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int i, plane;
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uint8_t *p;
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for (plane = 0; plane < 4 && dst[plane]; plane++) {
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int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
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int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
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int width = AV_CEIL_RSHIFT(w, hsub1);
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int height = AV_CEIL_RSHIFT(h, vsub1);
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p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
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for (i = 0; i < height; i++) {
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memcpy(p + (x >> hsub1) * pixelstep[plane],
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src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]);
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p += dst_linesize[plane];
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}
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}
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}
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int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
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const AVComponentDescriptor *c;
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unsigned i, nb_planes = 0;
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int pixelstep[MAX_PLANES] = { 0 };
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if (!desc || !desc->name)
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return AVERROR(EINVAL);
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if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA))
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return AVERROR(ENOSYS);
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if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE)
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return AVERROR(ENOSYS);
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for (i = 0; i < desc->nb_components; i++) {
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c = &desc->comp[i];
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/* for now, only 8-16 bits formats */
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if (c->depth < 8 || c->depth > 16)
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return AVERROR(ENOSYS);
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if (desc->flags & AV_PIX_FMT_FLAG_BE)
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return AVERROR(ENOSYS);
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if (c->plane >= MAX_PLANES)
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return AVERROR(ENOSYS);
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/* strange interleaving */
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if (pixelstep[c->plane] != 0 &&
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pixelstep[c->plane] != c->step)
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return AVERROR(ENOSYS);
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if (pixelstep[c->plane] == 6 &&
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c->depth == 16)
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return AVERROR(ENOSYS);
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pixelstep[c->plane] = c->step;
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if (pixelstep[c->plane] >= 8)
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return AVERROR(ENOSYS);
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nb_planes = FFMAX(nb_planes, c->plane + 1);
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}
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memset(draw, 0, sizeof(*draw));
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draw->desc = desc;
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draw->format = format;
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draw->nb_planes = nb_planes;
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draw->flags = flags;
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memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
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draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
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draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
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for (i = 0; i < (desc->nb_components - !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(flags & FF_DRAW_PROCESS_ALPHA))); i++)
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draw->comp_mask[desc->comp[i].plane] |=
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1 << desc->comp[i].offset;
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return 0;
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}
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void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
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{
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unsigned i;
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uint8_t rgba_map[4];
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if (rgba != color->rgba)
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memcpy(color->rgba, rgba, sizeof(color->rgba));
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if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) &&
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ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
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if (draw->nb_planes == 1) {
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for (i = 0; i < 4; i++) {
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color->comp[0].u8[rgba_map[i]] = rgba[i];
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if (draw->desc->comp[rgba_map[i]].depth > 8) {
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color->comp[0].u16[rgba_map[i]] = color->comp[0].u8[rgba_map[i]] << 8;
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}
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}
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} else {
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for (i = 0; i < 4; i++) {
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color->comp[rgba_map[i]].u8[0] = rgba[i];
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if (draw->desc->comp[rgba_map[i]].depth > 8)
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color->comp[rgba_map[i]].u16[0] = color->comp[rgba_map[i]].u8[0] << (draw->desc->comp[rgba_map[i]].depth - 8);
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}
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}
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} else if (draw->nb_planes >= 2) {
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/* assume YUV */
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const AVPixFmtDescriptor *desc = draw->desc;
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color->comp[desc->comp[0].plane].u8[desc->comp[0].offset] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
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color->comp[desc->comp[1].plane].u8[desc->comp[1].offset] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
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color->comp[desc->comp[2].plane].u8[desc->comp[2].offset] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
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color->comp[3].u8[0] = rgba[3];
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#define EXPAND(compn) \
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if (desc->comp[compn].depth > 8) \
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color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \
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color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << \
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(draw->desc->comp[compn].depth + draw->desc->comp[compn].shift - 8)
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EXPAND(3);
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EXPAND(2);
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EXPAND(1);
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EXPAND(0);
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} else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A) {
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color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
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color->comp[1].u8[0] = rgba[3];
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} else if (draw->format == AV_PIX_FMT_GRAY16LE || draw->format == AV_PIX_FMT_YA16LE) {
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color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
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color->comp[0].u16[0] = color->comp[0].u8[0] << 8;
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color->comp[1].u8[0] = rgba[3];
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color->comp[1].u16[0] = color->comp[1].u8[0] << 8;
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} else {
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av_log(NULL, AV_LOG_WARNING,
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"Color conversion not implemented for %s\n", draw->desc->name);
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memset(color, 128, sizeof(*color));
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}
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}
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static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
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int plane, int x, int y)
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{
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return data[plane] +
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(y >> draw->vsub[plane]) * linesize[plane] +
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(x >> draw->hsub[plane]) * draw->pixelstep[plane];
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}
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void ff_copy_rectangle2(FFDrawContext *draw,
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uint8_t *dst[], int dst_linesize[],
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uint8_t *src[], int src_linesize[],
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int dst_x, int dst_y, int src_x, int src_y,
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int w, int h)
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{
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int plane, y, wp, hp;
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uint8_t *p, *q;
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for (plane = 0; plane < draw->nb_planes; plane++) {
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p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
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q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
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wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];
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hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
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for (y = 0; y < hp; y++) {
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memcpy(q, p, wp);
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p += src_linesize[plane];
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q += dst_linesize[plane];
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}
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}
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}
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void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
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uint8_t *dst[], int dst_linesize[],
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int dst_x, int dst_y, int w, int h)
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{
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int plane, x, y, wp, hp;
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uint8_t *p0, *p;
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FFDrawColor color_tmp = *color;
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for (plane = 0; plane < draw->nb_planes; plane++) {
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p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
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wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]);
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hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
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if (!hp)
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return;
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p = p0;
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if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) {
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for (x = 0; 2*x < draw->pixelstep[plane]; x++)
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color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]);
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}
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/* copy first line from color */
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for (x = 0; x < wp; x++) {
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memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]);
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p += draw->pixelstep[plane];
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}
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wp *= draw->pixelstep[plane];
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/* copy next lines from first line */
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p = p0 + dst_linesize[plane];
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for (y = 1; y < hp; y++) {
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memcpy(p, p0, wp);
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p += dst_linesize[plane];
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}
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}
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}
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/**
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* Clip interval [x; x+w[ within [0; wmax[.
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* The resulting w may be negative if the final interval is empty.
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* dx, if not null, return the difference between in and out value of x.
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*/
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static void clip_interval(int wmax, int *x, int *w, int *dx)
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{
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if (dx)
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*dx = 0;
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if (*x < 0) {
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if (dx)
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*dx = -*x;
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*w += *x;
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*x = 0;
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}
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if (*x + *w > wmax)
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*w = wmax - *x;
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}
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/**
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* Decompose w pixels starting at x
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* into start + (w starting at x) + end
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* with x and w aligned on multiples of 1<<sub.
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*/
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static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
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{
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int mask = (1 << sub) - 1;
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*start = (-*x) & mask;
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*x += *start;
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*start = FFMIN(*start, *w);
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*w -= *start;
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*end = *w & mask;
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*w >>= sub;
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}
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static int component_used(FFDrawContext *draw, int plane, int comp)
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{
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return (draw->comp_mask[plane] >> comp) & 1;
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}
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/* If alpha is in the [ 0 ; 0x1010101 ] range,
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then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
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and >> 24 gives a correct rounding. */
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static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
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int dx, int w, unsigned hsub, int left, int right)
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{
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unsigned asrc = alpha * src;
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unsigned tau = 0x1010101 - alpha;
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int x;
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if (left) {
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unsigned suba = (left * alpha) >> hsub;
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*dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
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dst += dx;
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}
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for (x = 0; x < w; x++) {
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*dst = (*dst * tau + asrc) >> 24;
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dst += dx;
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}
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if (right) {
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unsigned suba = (right * alpha) >> hsub;
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*dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
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}
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}
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static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha,
|
|
int dx, int w, unsigned hsub, int left, int right)
|
|
{
|
|
unsigned asrc = alpha * src;
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|
unsigned tau = 0x10001 - alpha;
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|
int x;
|
|
|
|
if (left) {
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|
unsigned suba = (left * alpha) >> hsub;
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|
uint16_t value = AV_RL16(dst);
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|
AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
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|
dst += dx;
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|
}
|
|
for (x = 0; x < w; x++) {
|
|
uint16_t value = AV_RL16(dst);
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|
AV_WL16(dst, (value * tau + asrc) >> 16);
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|
dst += dx;
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|
}
|
|
if (right) {
|
|
unsigned suba = (right * alpha) >> hsub;
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|
uint16_t value = AV_RL16(dst);
|
|
AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
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|
}
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|
}
|
|
|
|
void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
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uint8_t *dst[], int dst_linesize[],
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int dst_w, int dst_h,
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|
int x0, int y0, int w, int h)
|
|
{
|
|
unsigned alpha, nb_planes, nb_comp, plane, comp;
|
|
int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
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|
uint8_t *p0, *p;
|
|
|
|
/* TODO optimize if alpha = 0xFF */
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|
clip_interval(dst_w, &x0, &w, NULL);
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|
clip_interval(dst_h, &y0, &h, NULL);
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|
if (w <= 0 || h <= 0 || !color->rgba[3])
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|
return;
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|
if (draw->desc->comp[0].depth <= 8) {
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|
/* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
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|
alpha = 0x10203 * color->rgba[3] + 0x2;
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|
} else {
|
|
/* 0x101 * alpha is in the [ 2 ; 0x1001] range */
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|
alpha = 0x101 * color->rgba[3] + 0x2;
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|
}
|
|
nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
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|
nb_planes += !nb_planes;
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|
for (plane = 0; plane < nb_planes; plane++) {
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|
nb_comp = draw->pixelstep[plane];
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|
p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
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|
w_sub = w;
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|
h_sub = h;
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|
x_sub = x0;
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|
y_sub = y0;
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|
subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
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|
subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
|
|
for (comp = 0; comp < nb_comp; comp++) {
|
|
const int depth = draw->desc->comp[comp].depth;
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|
|
|
if (!component_used(draw, plane, comp))
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|
continue;
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|
p = p0 + comp;
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|
if (top) {
|
|
if (depth <= 8) {
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|
blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
|
|
draw->pixelstep[plane], w_sub,
|
|
draw->hsub[plane], left, right);
|
|
} else {
|
|
blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
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|
draw->pixelstep[plane], w_sub,
|
|
draw->hsub[plane], left, right);
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|
}
|
|
p += dst_linesize[plane];
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|
}
|
|
if (depth <= 8) {
|
|
for (y = 0; y < h_sub; y++) {
|
|
blend_line(p, color->comp[plane].u8[comp], alpha,
|
|
draw->pixelstep[plane], w_sub,
|
|
draw->hsub[plane], left, right);
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|
p += dst_linesize[plane];
|
|
}
|
|
} else {
|
|
for (y = 0; y < h_sub; y++) {
|
|
blend_line16(p, color->comp[plane].u16[comp], alpha,
|
|
draw->pixelstep[plane], w_sub,
|
|
draw->hsub[plane], left, right);
|
|
p += dst_linesize[plane];
|
|
}
|
|
}
|
|
if (bottom) {
|
|
if (depth <= 8) {
|
|
blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
|
|
draw->pixelstep[plane], w_sub,
|
|
draw->hsub[plane], left, right);
|
|
} else {
|
|
blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
|
|
draw->pixelstep[plane], w_sub,
|
|
draw->hsub[plane], left, right);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha,
|
|
const uint8_t *mask, int mask_linesize, int l2depth,
|
|
unsigned w, unsigned h, unsigned shift, unsigned xm0)
|
|
{
|
|
unsigned xm, x, y, t = 0;
|
|
unsigned xmshf = 3 - l2depth;
|
|
unsigned xmmod = 7 >> l2depth;
|
|
unsigned mbits = (1 << (1 << l2depth)) - 1;
|
|
unsigned mmult = 255 / mbits;
|
|
uint16_t value = AV_RL16(dst);
|
|
|
|
for (y = 0; y < h; y++) {
|
|
xm = xm0;
|
|
for (x = 0; x < w; x++) {
|
|
t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
|
|
* mmult;
|
|
xm++;
|
|
}
|
|
mask += mask_linesize;
|
|
}
|
|
alpha = (t >> shift) * alpha;
|
|
AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16);
|
|
}
|
|
|
|
static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
|
|
const uint8_t *mask, int mask_linesize, int l2depth,
|
|
unsigned w, unsigned h, unsigned shift, unsigned xm0)
|
|
{
|
|
unsigned xm, x, y, t = 0;
|
|
unsigned xmshf = 3 - l2depth;
|
|
unsigned xmmod = 7 >> l2depth;
|
|
unsigned mbits = (1 << (1 << l2depth)) - 1;
|
|
unsigned mmult = 255 / mbits;
|
|
|
|
for (y = 0; y < h; y++) {
|
|
xm = xm0;
|
|
for (x = 0; x < w; x++) {
|
|
t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
|
|
* mmult;
|
|
xm++;
|
|
}
|
|
mask += mask_linesize;
|
|
}
|
|
alpha = (t >> shift) * alpha;
|
|
*dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
|
|
}
|
|
|
|
static void blend_line_hv16(uint8_t *dst, int dst_delta,
|
|
unsigned src, unsigned alpha,
|
|
const uint8_t *mask, int mask_linesize, int l2depth, int w,
|
|
unsigned hsub, unsigned vsub,
|
|
int xm, int left, int right, int hband)
|
|
{
|
|
int x;
|
|
|
|
if (left) {
|
|
blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
|
|
left, hband, hsub + vsub, xm);
|
|
dst += dst_delta;
|
|
xm += left;
|
|
}
|
|
for (x = 0; x < w; x++) {
|
|
blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
|
|
1 << hsub, hband, hsub + vsub, xm);
|
|
dst += dst_delta;
|
|
xm += 1 << hsub;
|
|
}
|
|
if (right)
|
|
blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
|
|
right, hband, hsub + vsub, xm);
|
|
}
|
|
|
|
static void blend_line_hv(uint8_t *dst, int dst_delta,
|
|
unsigned src, unsigned alpha,
|
|
const uint8_t *mask, int mask_linesize, int l2depth, int w,
|
|
unsigned hsub, unsigned vsub,
|
|
int xm, int left, int right, int hband)
|
|
{
|
|
int x;
|
|
|
|
if (left) {
|
|
blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
|
|
left, hband, hsub + vsub, xm);
|
|
dst += dst_delta;
|
|
xm += left;
|
|
}
|
|
for (x = 0; x < w; x++) {
|
|
blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
|
|
1 << hsub, hband, hsub + vsub, xm);
|
|
dst += dst_delta;
|
|
xm += 1 << hsub;
|
|
}
|
|
if (right)
|
|
blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
|
|
right, hband, hsub + vsub, xm);
|
|
}
|
|
|
|
void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
|
|
uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
|
|
const uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
|
|
int l2depth, unsigned endianness, int x0, int y0)
|
|
{
|
|
unsigned alpha, nb_planes, nb_comp, plane, comp;
|
|
int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
|
|
uint8_t *p0, *p;
|
|
const uint8_t *m;
|
|
|
|
clip_interval(dst_w, &x0, &mask_w, &xm0);
|
|
clip_interval(dst_h, &y0, &mask_h, &ym0);
|
|
mask += ym0 * mask_linesize;
|
|
if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
|
|
return;
|
|
if (draw->desc->comp[0].depth <= 8) {
|
|
/* alpha is in the [ 0 ; 0x10203 ] range,
|
|
alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
|
|
alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
|
|
} else {
|
|
alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
|
|
}
|
|
nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
|
|
nb_planes += !nb_planes;
|
|
for (plane = 0; plane < nb_planes; plane++) {
|
|
nb_comp = draw->pixelstep[plane];
|
|
p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
|
|
w_sub = mask_w;
|
|
h_sub = mask_h;
|
|
x_sub = x0;
|
|
y_sub = y0;
|
|
subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
|
|
subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
|
|
for (comp = 0; comp < nb_comp; comp++) {
|
|
const int depth = draw->desc->comp[comp].depth;
|
|
|
|
if (!component_used(draw, plane, comp))
|
|
continue;
|
|
p = p0 + comp;
|
|
m = mask;
|
|
if (top) {
|
|
if (depth <= 8) {
|
|
blend_line_hv(p, draw->pixelstep[plane],
|
|
color->comp[plane].u8[comp], alpha,
|
|
m, mask_linesize, l2depth, w_sub,
|
|
draw->hsub[plane], draw->vsub[plane],
|
|
xm0, left, right, top);
|
|
} else {
|
|
blend_line_hv16(p, draw->pixelstep[plane],
|
|
color->comp[plane].u16[comp], alpha,
|
|
m, mask_linesize, l2depth, w_sub,
|
|
draw->hsub[plane], draw->vsub[plane],
|
|
xm0, left, right, top);
|
|
}
|
|
p += dst_linesize[plane];
|
|
m += top * mask_linesize;
|
|
}
|
|
if (depth <= 8) {
|
|
for (y = 0; y < h_sub; y++) {
|
|
blend_line_hv(p, draw->pixelstep[plane],
|
|
color->comp[plane].u8[comp], alpha,
|
|
m, mask_linesize, l2depth, w_sub,
|
|
draw->hsub[plane], draw->vsub[plane],
|
|
xm0, left, right, 1 << draw->vsub[plane]);
|
|
p += dst_linesize[plane];
|
|
m += mask_linesize << draw->vsub[plane];
|
|
}
|
|
} else {
|
|
for (y = 0; y < h_sub; y++) {
|
|
blend_line_hv16(p, draw->pixelstep[plane],
|
|
color->comp[plane].u16[comp], alpha,
|
|
m, mask_linesize, l2depth, w_sub,
|
|
draw->hsub[plane], draw->vsub[plane],
|
|
xm0, left, right, 1 << draw->vsub[plane]);
|
|
p += dst_linesize[plane];
|
|
m += mask_linesize << draw->vsub[plane];
|
|
}
|
|
}
|
|
if (bottom) {
|
|
if (depth <= 8) {
|
|
blend_line_hv(p, draw->pixelstep[plane],
|
|
color->comp[plane].u8[comp], alpha,
|
|
m, mask_linesize, l2depth, w_sub,
|
|
draw->hsub[plane], draw->vsub[plane],
|
|
xm0, left, right, bottom);
|
|
} else {
|
|
blend_line_hv16(p, draw->pixelstep[plane],
|
|
color->comp[plane].u16[comp], alpha,
|
|
m, mask_linesize, l2depth, w_sub,
|
|
draw->hsub[plane], draw->vsub[plane],
|
|
xm0, left, right, bottom);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
|
|
int value)
|
|
{
|
|
unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
|
|
|
|
if (!shift)
|
|
return value;
|
|
if (round_dir >= 0)
|
|
value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
|
|
return (value >> shift) << shift;
|
|
}
|
|
|
|
AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
|
|
{
|
|
enum AVPixelFormat i;
|
|
FFDrawContext draw;
|
|
AVFilterFormats *fmts = NULL;
|
|
int ret;
|
|
|
|
for (i = 0; av_pix_fmt_desc_get(i); i++)
|
|
if (ff_draw_init(&draw, i, flags) >= 0 &&
|
|
(ret = ff_add_format(&fmts, i)) < 0)
|
|
return NULL;
|
|
return fmts;
|
|
}
|