551 lines
19 KiB
C
551 lines
19 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 "libavutil/avutil.h"
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#include "libavutil/colorspace.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 PixelFormat pix_fmt)
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{
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switch (pix_fmt) {
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case PIX_FMT_0RGB:
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case 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 PIX_FMT_0BGR:
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case 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 PIX_FMT_RGB0:
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case PIX_FMT_RGBA:
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case 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 PIX_FMT_BGRA:
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case PIX_FMT_BGR0:
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case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 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 PixelFormat 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_descriptors[pix_fmt];
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int 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(w * pixel_step[0]);
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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 = (w >> hsub1) * pixel_step[plane];
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line[plane] = av_malloc(line_size);
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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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p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
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for (i = 0; i < (h >> vsub1); i++) {
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memcpy(p + (x >> hsub1) * pixelstep[plane],
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src[plane], (w >> hsub1) * 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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p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
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for (i = 0; i < (h >> vsub1); i++) {
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memcpy(p + (x >> hsub1) * pixelstep[plane],
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src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), (w >> hsub1) * 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 PixelFormat format, unsigned flags)
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{
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const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[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->name)
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return AVERROR(EINVAL);
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if (desc->flags & ~(PIX_FMT_PLANAR | PIX_FMT_RGB | PIX_FMT_PSEUDOPAL))
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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-bits formats */
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if (c->depth_minus1 != 8 - 1)
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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_minus1 + 1)
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return AVERROR(ENOSYS);
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pixelstep[c->plane] = c->step_minus1 + 1;
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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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if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3)
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return AVERROR(ENOSYS); /* exclude NV12 and NV21 */
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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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memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
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if (nb_planes >= 3 && !(desc->flags & PIX_FMT_RGB)) {
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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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}
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for (i = 0; i < ((desc->nb_components - 1) | 1); i++)
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draw->comp_mask[desc->comp[i].plane] |=
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1 << (desc->comp[i].offset_plus1 - 1);
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return 0;
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}
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void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, 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 & PIX_FMT_RGB) && draw->nb_planes == 1 &&
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ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
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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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} else if (draw->nb_planes == 3 || draw->nb_planes == 4) {
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/* assume YUV */
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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] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
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color->comp[2].u8[0] = 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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} else if (draw->format == PIX_FMT_GRAY8 || draw->format == 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 {
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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 = (w >> draw->hsub[plane]) * draw->pixelstep[plane];
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hp = (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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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 = (w >> draw->hsub[plane]);
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hp = (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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/* copy first line from color */
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for (x = 0; x < wp; x++) {
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memcpy(p, color->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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src *= alpha;
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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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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)
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{
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unsigned alpha, nb_planes, nb_comp, plane, comp;
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int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
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uint8_t *p0, *p;
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/* 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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/* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
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alpha = 0x10203 * color->rgba[3] + 0x2;
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nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */
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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);
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for (comp = 0; comp < nb_comp; comp++) {
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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) {
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blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
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draw->pixelstep[plane], w_sub,
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draw->hsub[plane], left, right);
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p += dst_linesize[plane];
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}
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for (y = 0; y < h_sub; y++) {
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blend_line(p, color->comp[plane].u8[comp], alpha,
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draw->pixelstep[plane], w_sub,
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draw->hsub[plane], left, right);
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p += dst_linesize[plane];
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}
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if (bottom)
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blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
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draw->pixelstep[plane], w_sub,
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draw->hsub[plane], left, right);
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}
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}
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}
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static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
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uint8_t *mask, int mask_linesize, int l2depth,
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unsigned w, unsigned h, unsigned shift, unsigned xm0)
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{
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unsigned xm, x, y, t = 0;
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unsigned xmshf = 3 - l2depth;
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unsigned xmmod = 7 >> l2depth;
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unsigned mbits = (1 << (1 << l2depth)) - 1;
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unsigned mmult = 255 / mbits;
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for (y = 0; y < h; y++) {
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xm = xm0;
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for (x = 0; x < w; x++) {
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t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
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* mmult;
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xm++;
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}
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mask += mask_linesize;
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}
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alpha = (t >> shift) * alpha;
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*dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
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}
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static void blend_line_hv(uint8_t *dst, int dst_delta,
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unsigned src, unsigned alpha,
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uint8_t *mask, int mask_linesize, int l2depth, int w,
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unsigned hsub, unsigned vsub,
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int xm, int left, int right, int hband)
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{
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int x;
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if (left) {
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blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
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left, hband, hsub + vsub, xm);
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dst += dst_delta;
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xm += left;
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}
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for (x = 0; x < w; x++) {
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blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
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1 << hsub, hband, hsub + vsub, xm);
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dst += dst_delta;
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xm += 1 << hsub;
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}
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if (right)
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blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
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right, hband, hsub + vsub, xm);
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}
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void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
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uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
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uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
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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, *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;
|
|
/* alpha is in the [ 0 ; 0x10203 ] range,
|
|
alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
|
|
alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
|
|
nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */
|
|
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++) {
|
|
if (!component_used(draw, plane, comp))
|
|
continue;
|
|
p = p0 + comp;
|
|
m = mask;
|
|
if (top) {
|
|
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);
|
|
p += dst_linesize[plane];
|
|
m += top * mask_linesize;
|
|
}
|
|
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];
|
|
}
|
|
if (bottom)
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
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 PixelFormat i, pix_fmts[PIX_FMT_NB + 1];
|
|
unsigned n = 0;
|
|
FFDrawContext draw;
|
|
|
|
for (i = 0; i < PIX_FMT_NB; i++)
|
|
if (ff_draw_init(&draw, i, flags) >= 0)
|
|
pix_fmts[n++] = i;
|
|
pix_fmts[n++] = PIX_FMT_NONE;
|
|
return ff_make_format_list(pix_fmts);
|
|
}
|
|
|
|
#ifdef TEST
|
|
|
|
#undef printf
|
|
|
|
int main(void)
|
|
{
|
|
enum PixelFormat f;
|
|
const AVPixFmtDescriptor *desc;
|
|
FFDrawContext draw;
|
|
FFDrawColor color;
|
|
int r, i;
|
|
|
|
for (f = 0; f < PIX_FMT_NB; f++) {
|
|
desc = &av_pix_fmt_descriptors[f];
|
|
if (!desc->name)
|
|
continue;
|
|
printf("Testing %s...%*s", desc->name,
|
|
(int)(16 - strlen(desc->name)), "");
|
|
r = ff_draw_init(&draw, f, 0);
|
|
if (r < 0) {
|
|
char buf[128];
|
|
av_strerror(r, buf, sizeof(buf));
|
|
printf("no: %s\n", buf);
|
|
continue;
|
|
}
|
|
ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 });
|
|
for (i = 0; i < sizeof(color); i++)
|
|
if (((uint8_t *)&color)[i] != 128)
|
|
break;
|
|
if (i == sizeof(color)) {
|
|
printf("fallback color\n");
|
|
continue;
|
|
}
|
|
printf("ok\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif
|