mirror of
https://github.com/mpv-player/mpv.git
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c2d0d7818f
This has no reason to be there. Put the functionality into another function instead. While we're at it, also adjust for possible accuracy issues with high bit depth YUV (matters for rendering subtitles into screenshots only).
579 lines
19 KiB
C
579 lines
19 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stddef.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <math.h>
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#include <inttypes.h>
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#include <libswscale/swscale.h>
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#include <libavutil/common.h>
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#include "common/common.h"
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#include "draw_bmp.h"
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#include "img_convert.h"
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#include "video/mp_image.h"
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#include "video/sws_utils.h"
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#include "video/img_format.h"
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#include "video/csputils.h"
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const bool mp_draw_sub_formats[SUBBITMAP_COUNT] = {
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[SUBBITMAP_LIBASS] = true,
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[SUBBITMAP_RGBA] = true,
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};
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struct sub_cache {
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struct mp_image *i, *a;
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};
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struct part {
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int change_id;
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int imgfmt;
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enum mp_csp colorspace;
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enum mp_csp_levels levels;
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int num_imgs;
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struct sub_cache *imgs;
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};
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struct mp_draw_sub_cache
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{
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struct part *parts[MAX_OSD_PARTS];
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struct mp_image *upsample_img;
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struct mp_image upsample_temp;
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};
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static struct part *get_cache(struct mp_draw_sub_cache *cache,
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struct sub_bitmaps *sbs, struct mp_image *format);
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static bool get_sub_area(struct mp_rect bb, struct mp_image *temp,
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struct sub_bitmap *sb, struct mp_image *out_area,
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int *out_src_x, int *out_src_y);
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#define ACCURATE
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#define CONDITIONAL
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static void blend_const16_alpha(void *dst, int dst_stride, uint16_t srcp,
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uint8_t *srca, int srca_stride, uint8_t srcamul,
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int w, int h)
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{
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if (!srcamul)
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return;
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for (int y = 0; y < h; y++) {
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uint16_t *dst_r = (uint16_t *)((uint8_t *)dst + dst_stride * y);
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uint8_t *srca_r = srca + srca_stride * y;
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for (int x = 0; x < w; x++) {
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uint32_t srcap = srca_r[x];
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#ifdef CONDITIONAL
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if (!srcap)
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continue;
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#endif
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srcap *= srcamul; // now 0..65025
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dst_r[x] = (srcp * srcap + dst_r[x] * (65025 - srcap) + 32512) / 65025;
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}
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}
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}
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static void blend_const8_alpha(void *dst, int dst_stride, uint16_t srcp,
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uint8_t *srca, int srca_stride, uint8_t srcamul,
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int w, int h)
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{
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if (!srcamul)
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return;
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for (int y = 0; y < h; y++) {
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uint8_t *dst_r = (uint8_t *)dst + dst_stride * y;
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uint8_t *srca_r = srca + srca_stride * y;
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for (int x = 0; x < w; x++) {
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uint32_t srcap = srca_r[x];
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#ifdef CONDITIONAL
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if (!srcap)
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continue;
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#endif
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#ifdef ACCURATE
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srcap *= srcamul; // now 0..65025
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dst_r[x] = (srcp * srcap + dst_r[x] * (65025 - srcap) + 32512) / 65025;
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#else
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srcap = (srcap * srcamul + 255) >> 8;
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dst_r[x] = (srcp * srcap + dst_r[x] * (255 - srcap) + 255) >> 8;
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#endif
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}
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}
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}
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static void blend_const_alpha(void *dst, int dst_stride, int srcp,
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uint8_t *srca, int srca_stride, uint8_t srcamul,
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int w, int h, int bytes)
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{
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if (bytes == 2) {
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blend_const16_alpha(dst, dst_stride, srcp, srca, srca_stride, srcamul,
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w, h);
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} else if (bytes == 1) {
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blend_const8_alpha(dst, dst_stride, srcp, srca, srca_stride, srcamul,
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w, h);
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}
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}
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static void blend_src16_alpha(void *dst, int dst_stride, void *src,
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int src_stride, uint8_t *srca, int srca_stride,
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int w, int h)
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{
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for (int y = 0; y < h; y++) {
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uint16_t *dst_r = (uint16_t *)((uint8_t *)dst + dst_stride * y);
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uint16_t *src_r = (uint16_t *)((uint8_t *)src + src_stride * y);
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uint8_t *srca_r = srca + srca_stride * y;
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for (int x = 0; x < w; x++) {
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uint32_t srcap = srca_r[x];
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#ifdef CONDITIONAL
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if (!srcap)
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continue;
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#endif
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dst_r[x] = (src_r[x] * srcap + dst_r[x] * (255 - srcap) + 127) / 255;
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}
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}
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}
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static void blend_src8_alpha(void *dst, int dst_stride, void *src,
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int src_stride, uint8_t *srca, int srca_stride,
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int w, int h)
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{
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for (int y = 0; y < h; y++) {
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uint8_t *dst_r = (uint8_t *)dst + dst_stride * y;
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uint8_t *src_r = (uint8_t *)src + src_stride * y;
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uint8_t *srca_r = srca + srca_stride * y;
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for (int x = 0; x < w; x++) {
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uint16_t srcap = srca_r[x];
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#ifdef CONDITIONAL
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if (!srcap)
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continue;
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#endif
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#ifdef ACCURATE
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dst_r[x] = (src_r[x] * srcap + dst_r[x] * (255 - srcap) + 127) / 255;
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#else
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dst_r[x] = (src_r[x] * srcap + dst_r[x] * (255 - srcap) + 255) >> 8;
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#endif
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}
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}
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}
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static void blend_src_alpha(void *dst, int dst_stride, void *src,
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int src_stride, uint8_t *srca, int srca_stride,
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int w, int h, int bytes)
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{
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if (bytes == 2) {
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blend_src16_alpha(dst, dst_stride, src, src_stride, srca, srca_stride,
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w, h);
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} else if (bytes == 1) {
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blend_src8_alpha(dst, dst_stride, src, src_stride, srca, srca_stride,
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w, h);
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}
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}
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static void unpremultiply_and_split_BGR32(struct mp_image *img,
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struct mp_image *alpha)
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{
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for (int y = 0; y < img->h; ++y) {
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uint32_t *irow = (uint32_t *) &img->planes[0][img->stride[0] * y];
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uint8_t *arow = &alpha->planes[0][alpha->stride[0] * y];
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for (int x = 0; x < img->w; ++x) {
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uint32_t pval = irow[x];
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uint8_t aval = (pval >> 24);
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uint8_t rval = (pval >> 16) & 0xFF;
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uint8_t gval = (pval >> 8) & 0xFF;
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uint8_t bval = pval & 0xFF;
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// multiplied = separate * alpha / 255
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// separate = rint(multiplied * 255 / alpha)
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// = floor(multiplied * 255 / alpha + 0.5)
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// = floor((multiplied * 255 + 0.5 * alpha) / alpha)
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// = floor((multiplied * 255 + floor(0.5 * alpha)) / alpha)
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int div = (int) aval;
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int add = div / 2;
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if (aval) {
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rval = FFMIN(255, (rval * 255 + add) / div);
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gval = FFMIN(255, (gval * 255 + add) / div);
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bval = FFMIN(255, (bval * 255 + add) / div);
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irow[x] = bval + (gval << 8) + (rval << 16) + (aval << 24);
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}
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arow[x] = aval;
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}
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}
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}
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// dst_format merely contains the target colorspace/format information
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static void scale_sb_rgba(struct sub_bitmap *sb, struct mp_image *dst_format,
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struct mp_image **out_sbi, struct mp_image **out_sba)
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{
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struct mp_image sbisrc = {0};
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mp_image_setfmt(&sbisrc, IMGFMT_BGR32);
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mp_image_set_size(&sbisrc, sb->w, sb->h);
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sbisrc.planes[0] = sb->bitmap;
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sbisrc.stride[0] = sb->stride;
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struct mp_image *sbisrc2 = mp_image_alloc(IMGFMT_BGR32, sb->dw, sb->dh);
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struct mp_image *sba = mp_image_alloc(IMGFMT_Y8, sb->dw, sb->dh);
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struct mp_image *sbi = mp_image_alloc(dst_format->imgfmt, sb->dw, sb->dh);
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if (!sbisrc2 || !sba || !sbi) {
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talloc_free(sbisrc2);
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talloc_free(sba);
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talloc_free(sbi);
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return;
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}
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mp_image_swscale(sbisrc2, &sbisrc, SWS_BILINEAR);
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unpremultiply_and_split_BGR32(sbisrc2, sba);
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sbi->params.colorspace = dst_format->params.colorspace;
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sbi->params.colorlevels = dst_format->params.colorlevels;
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mp_image_swscale(sbi, sbisrc2, SWS_BILINEAR);
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talloc_free(sbisrc2);
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*out_sbi = sbi;
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*out_sba = sba;
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}
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static void draw_rgba(struct mp_draw_sub_cache *cache, struct mp_rect bb,
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struct mp_image *temp, int bits,
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struct sub_bitmaps *sbs)
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{
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struct part *part = get_cache(cache, sbs, temp);
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assert(part);
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for (int i = 0; i < sbs->num_parts; ++i) {
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struct sub_bitmap *sb = &sbs->parts[i];
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if (sb->w < 1 || sb->h < 1)
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continue;
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struct mp_image dst;
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int src_x, src_y;
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if (!get_sub_area(bb, temp, sb, &dst, &src_x, &src_y))
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continue;
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struct mp_image *sbi = part->imgs[i].i;
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struct mp_image *sba = part->imgs[i].a;
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if (!(sbi && sba))
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scale_sb_rgba(sb, temp, &sbi, &sba);
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// on OOM, skip drawing
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if (!(sbi && sba))
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continue;
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int bytes = (bits + 7) / 8;
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uint8_t *alpha_p = sba->planes[0] + src_y * sba->stride[0] + src_x;
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for (int p = 0; p < (temp->num_planes > 2 ? 3 : 1); p++) {
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void *src = sbi->planes[p] + src_y * sbi->stride[p] + src_x * bytes;
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blend_src_alpha(dst.planes[p], dst.stride[p], src, sbi->stride[p],
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alpha_p, sba->stride[0], dst.w, dst.h, bytes);
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}
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part->imgs[i].i = talloc_steal(part, sbi);
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part->imgs[i].a = talloc_steal(part, sba);
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}
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}
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static void draw_ass(struct mp_draw_sub_cache *cache, struct mp_rect bb,
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struct mp_image *temp, int bits, struct sub_bitmaps *sbs)
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{
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struct mp_csp_params cspar = MP_CSP_PARAMS_DEFAULTS;
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mp_csp_set_image_params(&cspar, &temp->params);
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cspar.levels_out = MP_CSP_LEVELS_PC; // RGB (libass.color)
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cspar.input_bits = bits;
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cspar.texture_bits = (bits + 7) / 8 * 8;
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struct mp_cmat yuv2rgb, rgb2yuv;
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bool need_conv = temp->fmt.flags & MP_IMGFLAG_YUV;
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if (need_conv) {
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mp_get_yuv2rgb_coeffs(&cspar, &yuv2rgb);
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mp_invert_yuv2rgb(&rgb2yuv, &yuv2rgb);
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}
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for (int i = 0; i < sbs->num_parts; ++i) {
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struct sub_bitmap *sb = &sbs->parts[i];
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struct mp_image dst;
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int src_x, src_y;
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if (!get_sub_area(bb, temp, sb, &dst, &src_x, &src_y))
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continue;
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int r = (sb->libass.color >> 24) & 0xFF;
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int g = (sb->libass.color >> 16) & 0xFF;
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int b = (sb->libass.color >> 8) & 0xFF;
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int a = 255 - (sb->libass.color & 0xFF);
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int color_yuv[3];
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if (need_conv) {
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int rgb[3] = {r, g, b};
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mp_map_fixp_color(&rgb2yuv, 8, rgb, cspar.texture_bits, color_yuv);
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} else {
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color_yuv[0] = g;
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color_yuv[1] = b;
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color_yuv[2] = r;
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}
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int bytes = (bits + 7) / 8;
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uint8_t *alpha_p = (uint8_t *)sb->bitmap + src_y * sb->stride + src_x;
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for (int p = 0; p < (temp->num_planes > 2 ? 3 : 1); p++) {
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blend_const_alpha(dst.planes[p], dst.stride[p], color_yuv[p],
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alpha_p, sb->stride, a, dst.w, dst.h, bytes);
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}
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}
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}
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static void get_swscale_alignment(const struct mp_image *img, int *out_xstep,
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int *out_ystep)
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{
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int sx = (1 << img->fmt.chroma_xs);
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int sy = (1 << img->fmt.chroma_ys);
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for (int p = 0; p < img->num_planes; ++p) {
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int bits = img->fmt.bpp[p];
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// the * 2 fixes problems with writing past the destination width
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while (((sx >> img->fmt.chroma_xs) * bits) % (SWS_MIN_BYTE_ALIGN * 8 * 2))
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sx *= 2;
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}
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*out_xstep = sx;
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*out_ystep = sy;
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}
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static void align_bbox(int xstep, int ystep, struct mp_rect *rc)
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{
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rc->x0 = rc->x0 & ~(xstep - 1);
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rc->y0 = rc->y0 & ~(ystep - 1);
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rc->x1 = FFALIGN(rc->x1, xstep);
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rc->y1 = FFALIGN(rc->y1, ystep);
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}
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// Post condition, if true returned: rc is inside img
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static bool align_bbox_for_swscale(struct mp_image *img, struct mp_rect *rc)
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{
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struct mp_rect img_rect = {0, 0, img->w, img->h};
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// Get rid of negative coordinates
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if (!mp_rect_intersection(rc, &img_rect))
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return false;
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int xstep, ystep;
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get_swscale_alignment(img, &xstep, &ystep);
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align_bbox(xstep, ystep, rc);
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return mp_rect_intersection(rc, &img_rect);
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}
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// Try to find best/closest YUV 444 format (or similar) for imgfmt
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static void get_closest_y444_format(int imgfmt, int *out_format, int *out_bits)
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{
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struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(imgfmt);
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if (desc.flags & MP_IMGFLAG_RGB) {
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*out_format = IMGFMT_GBRP;
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*out_bits = 8;
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return;
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} else if (desc.flags & MP_IMGFLAG_YUV_P) {
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*out_format = mp_imgfmt_find_yuv_planar(0, 0, desc.num_planes,
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desc.plane_bits);
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if (*out_format && mp_sws_supported_format(*out_format)) {
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*out_bits = mp_imgfmt_get_desc(*out_format).plane_bits;
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return;
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}
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}
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// fallback
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*out_format = IMGFMT_444P;
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*out_bits = 8;
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}
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static struct part *get_cache(struct mp_draw_sub_cache *cache,
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struct sub_bitmaps *sbs, struct mp_image *format)
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{
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struct part *part = NULL;
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bool use_cache = sbs->format == SUBBITMAP_RGBA;
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if (use_cache) {
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part = cache->parts[sbs->render_index];
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if (part) {
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if (part->change_id != sbs->change_id
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|| part->imgfmt != format->imgfmt
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|| part->colorspace != format->params.colorspace
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|| part->levels != format->params.colorlevels)
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{
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talloc_free(part);
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part = NULL;
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}
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}
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if (!part) {
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part = talloc(cache, struct part);
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*part = (struct part) {
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.change_id = sbs->change_id,
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.num_imgs = sbs->num_parts,
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.imgfmt = format->imgfmt,
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.levels = format->params.colorlevels,
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.colorspace = format->params.colorspace,
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};
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part->imgs = talloc_zero_array(part, struct sub_cache,
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part->num_imgs);
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}
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assert(part->num_imgs == sbs->num_parts);
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cache->parts[sbs->render_index] = part;
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}
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return part;
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}
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// Return area of intersection between target and sub-bitmap as cropped image
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static bool get_sub_area(struct mp_rect bb, struct mp_image *temp,
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struct sub_bitmap *sb, struct mp_image *out_area,
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int *out_src_x, int *out_src_y)
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{
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// coordinates are relative to the bbox
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struct mp_rect dst = {sb->x - bb.x0, sb->y - bb.y0};
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dst.x1 = dst.x0 + sb->dw;
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dst.y1 = dst.y0 + sb->dh;
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if (!mp_rect_intersection(&dst, &(struct mp_rect){0, 0, temp->w, temp->h}))
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return false;
|
|
|
|
*out_src_x = (dst.x0 - sb->x) + bb.x0;
|
|
*out_src_y = (dst.y0 - sb->y) + bb.y0;
|
|
*out_area = *temp;
|
|
mp_image_crop_rc(out_area, dst);
|
|
|
|
return true;
|
|
}
|
|
|
|
// Convert the src image to imgfmt (which should be a 444 format)
|
|
static struct mp_image *chroma_up(struct mp_draw_sub_cache *cache, int imgfmt,
|
|
struct mp_image *src)
|
|
{
|
|
if (src->imgfmt == imgfmt)
|
|
return src;
|
|
|
|
if (!cache->upsample_img || cache->upsample_img->imgfmt != imgfmt ||
|
|
cache->upsample_img->w < src->w || cache->upsample_img->h < src->h)
|
|
{
|
|
talloc_free(cache->upsample_img);
|
|
cache->upsample_img = mp_image_alloc(imgfmt, src->w, src->h);
|
|
talloc_steal(cache, cache->upsample_img);
|
|
if (!cache->upsample_img)
|
|
return NULL;
|
|
}
|
|
|
|
cache->upsample_temp = *cache->upsample_img;
|
|
struct mp_image *temp = &cache->upsample_temp;
|
|
mp_image_set_size(temp, src->w, src->h);
|
|
|
|
// The temp image is always YUV, but src not necessarily.
|
|
// Reduce amount of conversions in YUV case (upsampling/shifting only)
|
|
if (src->fmt.flags & MP_IMGFLAG_YUV) {
|
|
temp->params.colorspace = src->params.colorspace;
|
|
temp->params.colorlevels = src->params.colorlevels;
|
|
}
|
|
|
|
if (src->imgfmt == IMGFMT_420P) {
|
|
assert(imgfmt == IMGFMT_444P);
|
|
// Faster upsampling: keep Y plane, upsample chroma planes only
|
|
// The whole point is not having swscale copy the Y plane
|
|
struct mp_image t_dst = *temp;
|
|
mp_image_setfmt(&t_dst, IMGFMT_Y8);
|
|
mp_image_set_size(&t_dst, temp->w, temp->h);
|
|
struct mp_image t_src = t_dst;
|
|
mp_image_set_size(&t_src, src->w >> 1, src->h >> 1);
|
|
for (int c = 0; c < 2; c++) {
|
|
t_dst.planes[0] = temp->planes[1 + c];
|
|
t_dst.stride[0] = temp->stride[1 + c];
|
|
t_src.planes[0] = src->planes[1 + c];
|
|
t_src.stride[0] = src->stride[1 + c];
|
|
mp_image_swscale(&t_dst, &t_src, SWS_POINT);
|
|
}
|
|
temp->planes[0] = src->planes[0];
|
|
temp->stride[0] = src->stride[0];
|
|
} else {
|
|
mp_image_swscale(temp, src, SWS_POINT);
|
|
}
|
|
|
|
return temp;
|
|
}
|
|
|
|
// Undo chroma_up() (copy temp to old_src if needed)
|
|
static void chroma_down(struct mp_image *old_src, struct mp_image *temp)
|
|
{
|
|
assert(old_src->w == temp->w && old_src->h == temp->h);
|
|
if (temp != old_src) {
|
|
if (old_src->imgfmt == IMGFMT_420P) {
|
|
// Downsampling, skipping the Y plane (see chroma_up())
|
|
assert(temp->imgfmt == IMGFMT_444P);
|
|
assert(temp->planes[0] == old_src->planes[0]);
|
|
struct mp_image t_dst = *temp;
|
|
mp_image_setfmt(&t_dst, IMGFMT_Y8);
|
|
mp_image_set_size(&t_dst, old_src->w >> 1, old_src->h >> 1);
|
|
struct mp_image t_src = t_dst;
|
|
mp_image_set_size(&t_src, temp->w, temp->h);
|
|
for (int c = 0; c < 2; c++) {
|
|
t_dst.planes[0] = old_src->planes[1 + c];
|
|
t_dst.stride[0] = old_src->stride[1 + c];
|
|
t_src.planes[0] = temp->planes[1 + c];
|
|
t_src.stride[0] = temp->stride[1 + c];
|
|
mp_image_swscale(&t_dst, &t_src, SWS_AREA);
|
|
}
|
|
} else {
|
|
mp_image_swscale(old_src, temp, SWS_AREA); // chroma down
|
|
}
|
|
}
|
|
}
|
|
|
|
// cache: if not NULL, the function will set *cache to a talloc-allocated cache
|
|
// containing scaled versions of sbs contents - free the cache with
|
|
// talloc_free()
|
|
void mp_draw_sub_bitmaps(struct mp_draw_sub_cache **cache, struct mp_image *dst,
|
|
struct sub_bitmaps *sbs)
|
|
{
|
|
assert(mp_draw_sub_formats[sbs->format]);
|
|
if (!mp_sws_supported_format(dst->imgfmt))
|
|
return;
|
|
|
|
struct mp_draw_sub_cache *cache_ = cache ? *cache : NULL;
|
|
if (!cache_)
|
|
cache_ = talloc_zero(NULL, struct mp_draw_sub_cache);
|
|
|
|
int format, bits;
|
|
get_closest_y444_format(dst->imgfmt, &format, &bits);
|
|
|
|
struct mp_rect rc_list[MP_SUB_BB_LIST_MAX];
|
|
int num_rc = mp_get_sub_bb_list(sbs, rc_list, MP_SUB_BB_LIST_MAX);
|
|
|
|
for (int r = 0; r < num_rc; r++) {
|
|
struct mp_rect bb = rc_list[r];
|
|
|
|
if (!align_bbox_for_swscale(dst, &bb))
|
|
return;
|
|
|
|
struct mp_image dst_region = *dst;
|
|
mp_image_crop_rc(&dst_region, bb);
|
|
struct mp_image *temp = chroma_up(cache_, format, &dst_region);
|
|
if (!temp)
|
|
continue; // on OOM, skip region
|
|
|
|
if (sbs->format == SUBBITMAP_RGBA) {
|
|
draw_rgba(cache_, bb, temp, bits, sbs);
|
|
} else if (sbs->format == SUBBITMAP_LIBASS) {
|
|
draw_ass(cache_, bb, temp, bits, sbs);
|
|
}
|
|
|
|
chroma_down(&dst_region, temp);
|
|
}
|
|
|
|
if (cache) {
|
|
*cache = cache_;
|
|
} else {
|
|
talloc_free(cache_);
|
|
}
|
|
}
|
|
|
|
// vim: ts=4 sw=4 et tw=80
|