mpv/sub/draw_bmp.c

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/*
* This file is part of mpv.
*
Relicense some non-MPlayer source files to LGPL 2.1 or later This covers source files which were added in mplayer2 and mpv times only, and where all code is covered by LGPL relicensing agreements. There are probably more files to which this applies, but I'm being conservative here. A file named ao_sdl.c exists in MPlayer too, but the mpv one is a complete rewrite, and was added some time after the original ao_sdl.c was removed. The same applies to vo_sdl.c, for which the SDL2 API is radically different in addition (MPlayer supports SDL 1.2 only). common.c contains only code written by me. But common.h is a strange case: although it originally was named mp_common.h and exists in MPlayer too, by now it contains only definitions written by uau and me. The exceptions are the CONTROL_ defines - thus not changing the license of common.h yet. codec_tags.c contained once large tables generated from MPlayer's codecs.conf, but all of these tables were removed. From demux_playlist.c I'm removing a code fragment from someone who was not asked; this probably could be done later (see commit 15dccc37). misc.c is a bit complicated to reason about (it was split off mplayer.c and thus contains random functions out of this file), but actually all functions have been added post-MPlayer. Except get_relative_time(), which was written by uau, but looks similar to 3 different versions of something similar in each of the Unix/win32/OSX timer source files. I'm not sure what that means in regards to copyright, so I've just moved it into another still-GPL source file for now. screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but they're all gone.
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* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Relicense some non-MPlayer source files to LGPL 2.1 or later This covers source files which were added in mplayer2 and mpv times only, and where all code is covered by LGPL relicensing agreements. There are probably more files to which this applies, but I'm being conservative here. A file named ao_sdl.c exists in MPlayer too, but the mpv one is a complete rewrite, and was added some time after the original ao_sdl.c was removed. The same applies to vo_sdl.c, for which the SDL2 API is radically different in addition (MPlayer supports SDL 1.2 only). common.c contains only code written by me. But common.h is a strange case: although it originally was named mp_common.h and exists in MPlayer too, by now it contains only definitions written by uau and me. The exceptions are the CONTROL_ defines - thus not changing the license of common.h yet. codec_tags.c contained once large tables generated from MPlayer's codecs.conf, but all of these tables were removed. From demux_playlist.c I'm removing a code fragment from someone who was not asked; this probably could be done later (see commit 15dccc37). misc.c is a bit complicated to reason about (it was split off mplayer.c and thus contains random functions out of this file), but actually all functions have been added post-MPlayer. Except get_relative_time(), which was written by uau, but looks similar to 3 different versions of something similar in each of the Unix/win32/OSX timer source files. I'm not sure what that means in regards to copyright, so I've just moved it into another still-GPL source file for now. screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but they're all gone.
2016-01-19 17:36:06 +00:00
* GNU Lesser General Public License for more details.
*
Relicense some non-MPlayer source files to LGPL 2.1 or later This covers source files which were added in mplayer2 and mpv times only, and where all code is covered by LGPL relicensing agreements. There are probably more files to which this applies, but I'm being conservative here. A file named ao_sdl.c exists in MPlayer too, but the mpv one is a complete rewrite, and was added some time after the original ao_sdl.c was removed. The same applies to vo_sdl.c, for which the SDL2 API is radically different in addition (MPlayer supports SDL 1.2 only). common.c contains only code written by me. But common.h is a strange case: although it originally was named mp_common.h and exists in MPlayer too, by now it contains only definitions written by uau and me. The exceptions are the CONTROL_ defines - thus not changing the license of common.h yet. codec_tags.c contained once large tables generated from MPlayer's codecs.conf, but all of these tables were removed. From demux_playlist.c I'm removing a code fragment from someone who was not asked; this probably could be done later (see commit 15dccc37). misc.c is a bit complicated to reason about (it was split off mplayer.c and thus contains random functions out of this file), but actually all functions have been added post-MPlayer. Except get_relative_time(), which was written by uau, but looks similar to 3 different versions of something similar in each of the Unix/win32/OSX timer source files. I'm not sure what that means in regards to copyright, so I've just moved it into another still-GPL source file for now. screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but they're all gone.
2016-01-19 17:36:06 +00:00
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stddef.h>
#include <stdbool.h>
#include <assert.h>
#include <math.h>
#include <inttypes.h>
#include <libswscale/swscale.h>
#include <libavutil/common.h>
#include "common/common.h"
#include "draw_bmp.h"
#include "img_convert.h"
#include "video/mp_image.h"
#include "video/sws_utils.h"
#include "video/img_format.h"
#include "video/csputils.h"
const bool mp_draw_sub_formats[SUBBITMAP_COUNT] = {
[SUBBITMAP_LIBASS] = true,
[SUBBITMAP_RGBA] = true,
};
struct sub_cache {
struct mp_image *i, *a;
};
struct part {
int change_id;
int imgfmt;
enum mp_csp colorspace;
enum mp_csp_levels levels;
int num_imgs;
struct sub_cache *imgs;
};
struct mp_draw_sub_cache
{
struct part *parts[MAX_OSD_PARTS];
struct mp_image *upsample_img;
struct mp_image upsample_temp;
};
static struct part *get_cache(struct mp_draw_sub_cache *cache,
struct sub_bitmaps *sbs, struct mp_image *format);
static bool get_sub_area(struct mp_rect bb, struct mp_image *temp,
struct sub_bitmap *sb, struct mp_image *out_area,
int *out_src_x, int *out_src_y);
#define CONDITIONAL 1
#define BLEND_CONST_ALPHA(TYPE) \
TYPE *dst_r = dst_rp; \
for (int x = 0; x < w; x++) { \
uint32_t srcap = srca_r[x]; \
if (CONDITIONAL && !srcap) continue; \
srcap *= srcamul; /* now 0..65025 */ \
dst_r[x] = (srcp * srcap + dst_r[x] * (65025 - srcap) + 32512) / 65025; \
}
// dst = srcp * (srca * srcamul) + dst * (1 - (srca * srcamul))
static void blend_const_alpha(void *dst, int dst_stride, int srcp,
uint8_t *srca, int srca_stride, uint8_t srcamul,
int w, int h, int bytes)
{
if (!srcamul)
return;
for (int y = 0; y < h; y++) {
void *dst_rp = (uint8_t *)dst + dst_stride * y;
uint8_t *srca_r = srca + srca_stride * y;
if (bytes == 2) {
BLEND_CONST_ALPHA(uint16_t)
} else if (bytes == 1) {
BLEND_CONST_ALPHA(uint8_t)
}
}
}
#define BLEND_SRC_ALPHA(TYPE) \
TYPE *dst_r = dst_rp, *src_r = src_rp; \
for (int x = 0; x < w; x++) { \
uint32_t srcap = srca_r[x]; \
if (CONDITIONAL && !srcap) continue; \
dst_r[x] = (src_r[x] * srcap + dst_r[x] * (255 - srcap) + 127) / 255; \
}
// dst = src * srca + dst * (1 - srca)
static void blend_src_alpha(void *dst, int dst_stride, void *src,
int src_stride, uint8_t *srca, int srca_stride,
int w, int h, int bytes)
{
for (int y = 0; y < h; y++) {
void *dst_rp = (uint8_t *)dst + dst_stride * y;
void *src_rp = (uint8_t *)src + src_stride * y;
uint8_t *srca_r = srca + srca_stride * y;
if (bytes == 2) {
BLEND_SRC_ALPHA(uint16_t)
} else if (bytes == 1) {
BLEND_SRC_ALPHA(uint8_t)
}
}
}
#define BLEND_SRC_DST_MUL(TYPE, MAX) \
TYPE *dst_r = dst_rp; \
for (int x = 0; x < w; x++) { \
uint16_t srcp = src_r[x] * srcmul; /* now 0..65025 */ \
dst_r[x] = (srcp * (MAX) + dst_r[x] * (65025 - srcp) + 32512) / 65025; \
}
// dst = src * srcmul + dst * (1 - src * srcmul)
static void blend_src_dst_mul(void *dst, int dst_stride,
uint8_t *src, int src_stride, uint8_t srcmul,
int w, int h, int dst_bytes)
{
for (int y = 0; y < h; y++) {
void *dst_rp = (uint8_t *)dst + dst_stride * y;
uint8_t *src_r = (uint8_t *)src + src_stride * y;
if (dst_bytes == 2) {
BLEND_SRC_DST_MUL(uint16_t, 65025)
} else if (dst_bytes == 1) {
BLEND_SRC_DST_MUL(uint8_t, 255)
}
}
}
static void unpremultiply_and_split_BGR32(struct mp_image *img,
struct mp_image *alpha)
{
for (int y = 0; y < img->h; ++y) {
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uint32_t *irow = (uint32_t *) &img->planes[0][img->stride[0] * y];
uint8_t *arow = &alpha->planes[0][alpha->stride[0] * y];
for (int x = 0; x < img->w; ++x) {
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uint32_t pval = irow[x];
uint8_t aval = (pval >> 24);
uint8_t rval = (pval >> 16) & 0xFF;
uint8_t gval = (pval >> 8) & 0xFF;
uint8_t bval = pval & 0xFF;
// multiplied = separate * alpha / 255
// separate = rint(multiplied * 255 / alpha)
// = floor(multiplied * 255 / alpha + 0.5)
// = floor((multiplied * 255 + 0.5 * alpha) / alpha)
// = floor((multiplied * 255 + floor(0.5 * alpha)) / alpha)
int div = (int) aval;
int add = div / 2;
if (aval) {
rval = FFMIN(255, (rval * 255 + add) / div);
gval = FFMIN(255, (gval * 255 + add) / div);
bval = FFMIN(255, (bval * 255 + add) / div);
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irow[x] = bval + (gval << 8) + (rval << 16) + (aval << 24);
}
arow[x] = aval;
}
}
}
// dst_format merely contains the target colorspace/format information
static void scale_sb_rgba(struct sub_bitmap *sb, struct mp_image *dst_format,
struct mp_image **out_sbi, struct mp_image **out_sba)
{
struct mp_image sbisrc = {0};
mp_image_setfmt(&sbisrc, IMGFMT_BGR32);
mp_image_set_size(&sbisrc, sb->w, sb->h);
sbisrc.planes[0] = sb->bitmap;
sbisrc.stride[0] = sb->stride;
struct mp_image *sbisrc2 = mp_image_alloc(IMGFMT_BGR32, sb->dw, sb->dh);
struct mp_image *sba = mp_image_alloc(IMGFMT_Y8, sb->dw, sb->dh);
struct mp_image *sbi = mp_image_alloc(dst_format->imgfmt, sb->dw, sb->dh);
if (!sbisrc2 || !sba || !sbi) {
talloc_free(sbisrc2);
talloc_free(sba);
talloc_free(sbi);
return;
}
mp_image_swscale(sbisrc2, &sbisrc, SWS_BILINEAR);
unpremultiply_and_split_BGR32(sbisrc2, sba);
sbi->params.color = dst_format->params.color;
mp_image_swscale(sbi, sbisrc2, SWS_BILINEAR);
talloc_free(sbisrc2);
*out_sbi = sbi;
*out_sba = sba;
}
static void draw_rgba(struct mp_draw_sub_cache *cache, struct mp_rect bb,
struct mp_image *temp, int bits,
struct sub_bitmaps *sbs)
{
struct part *part = get_cache(cache, sbs, temp);
assert(part);
for (int i = 0; i < sbs->num_parts; ++i) {
struct sub_bitmap *sb = &sbs->parts[i];
if (sb->w < 1 || sb->h < 1)
continue;
struct mp_image dst;
int src_x, src_y;
if (!get_sub_area(bb, temp, sb, &dst, &src_x, &src_y))
continue;
struct mp_image *sbi = part->imgs[i].i;
struct mp_image *sba = part->imgs[i].a;
if (!(sbi && sba))
scale_sb_rgba(sb, temp, &sbi, &sba);
// on OOM, skip drawing
if (!(sbi && sba))
continue;
int bytes = (bits + 7) / 8;
uint8_t *alpha_p = sba->planes[0] + src_y * sba->stride[0] + src_x;
for (int p = 0; p < (temp->num_planes > 2 ? 3 : 1); p++) {
void *src = sbi->planes[p] + src_y * sbi->stride[p] + src_x * bytes;
blend_src_alpha(dst.planes[p], dst.stride[p], src, sbi->stride[p],
alpha_p, sba->stride[0], dst.w, dst.h, bytes);
}
if (temp->num_planes >= 4) {
blend_src_dst_mul(dst.planes[3], dst.stride[3], alpha_p,
sba->stride[0], 255, dst.w, dst.h, bytes);
}
part->imgs[i].i = talloc_steal(part, sbi);
part->imgs[i].a = talloc_steal(part, sba);
}
}
static void draw_ass(struct mp_draw_sub_cache *cache, struct mp_rect bb,
struct mp_image *temp, int bits, struct sub_bitmaps *sbs)
{
struct mp_csp_params cspar = MP_CSP_PARAMS_DEFAULTS;
mp_csp_set_image_params(&cspar, &temp->params);
cspar.levels_out = MP_CSP_LEVELS_PC; // RGB (libass.color)
cspar.input_bits = bits;
cspar.texture_bits = (bits + 7) / 8 * 8;
struct mp_cmat yuv2rgb, rgb2yuv;
bool need_conv = temp->fmt.flags & MP_IMGFLAG_YUV;
if (need_conv) {
mp_get_csp_matrix(&cspar, &yuv2rgb);
mp_invert_cmat(&rgb2yuv, &yuv2rgb);
}
for (int i = 0; i < sbs->num_parts; ++i) {
struct sub_bitmap *sb = &sbs->parts[i];
struct mp_image dst;
int src_x, src_y;
if (!get_sub_area(bb, temp, sb, &dst, &src_x, &src_y))
continue;
int r = (sb->libass.color >> 24) & 0xFF;
int g = (sb->libass.color >> 16) & 0xFF;
int b = (sb->libass.color >> 8) & 0xFF;
int a = 255 - (sb->libass.color & 0xFF);
int color_yuv[3];
if (need_conv) {
int rgb[3] = {r, g, b};
mp_map_fixp_color(&rgb2yuv, 8, rgb, cspar.texture_bits, color_yuv);
} else {
color_yuv[0] = g;
color_yuv[1] = b;
color_yuv[2] = r;
}
int bytes = (bits + 7) / 8;
uint8_t *alpha_p = (uint8_t *)sb->bitmap + src_y * sb->stride + src_x;
for (int p = 0; p < (temp->num_planes > 2 ? 3 : 1); p++) {
blend_const_alpha(dst.planes[p], dst.stride[p], color_yuv[p],
alpha_p, sb->stride, a, dst.w, dst.h, bytes);
}
if (temp->num_planes >= 4) {
blend_src_dst_mul(dst.planes[3], dst.stride[3], alpha_p,
sb->stride, a, dst.w, dst.h, bytes);
}
}
}
static void get_swscale_alignment(const struct mp_image *img, int *out_xstep,
int *out_ystep)
{
int sx = (1 << img->fmt.chroma_xs);
int sy = (1 << img->fmt.chroma_ys);
for (int p = 0; p < img->num_planes; ++p) {
int bits = img->fmt.bpp[p];
// the * 2 fixes problems with writing past the destination width
while (((sx >> img->fmt.chroma_xs) * bits) % (SWS_MIN_BYTE_ALIGN * 8 * 2))
sx *= 2;
}
*out_xstep = sx;
*out_ystep = sy;
}
static void align_bbox(int xstep, int ystep, struct mp_rect *rc)
{
rc->x0 = rc->x0 & ~(xstep - 1);
rc->y0 = rc->y0 & ~(ystep - 1);
rc->x1 = FFALIGN(rc->x1, xstep);
rc->y1 = FFALIGN(rc->y1, ystep);
}
// Post condition, if true returned: rc is inside img
static bool align_bbox_for_swscale(struct mp_image *img, struct mp_rect *rc)
{
struct mp_rect img_rect = {0, 0, img->w, img->h};
// Get rid of negative coordinates
if (!mp_rect_intersection(rc, &img_rect))
return false;
int xstep, ystep;
get_swscale_alignment(img, &xstep, &ystep);
align_bbox(xstep, ystep, rc);
return mp_rect_intersection(rc, &img_rect);
}
// Try to find best/closest YUV 444 format (or similar) for imgfmt
static void get_closest_y444_format(int imgfmt, int *out_format, int *out_bits)
{
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(imgfmt);
int planes = desc.flags & MP_IMGFLAG_ALPHA ? 4 : 3;
int bits = desc.component_bits > 8 ? 16 : 8;
if (desc.flags & MP_IMGFLAG_RGB) {
*out_format = mp_imgfmt_find(0, 0, planes, bits, MP_IMGFLAG_RGB_P);
if (!mp_sws_supported_format(*out_format))
*out_format = mp_imgfmt_find(0, 0, planes, 8, MP_IMGFLAG_RGB_P);
} else if (desc.flags & MP_IMGFLAG_YUV_P) {
*out_format = mp_imgfmt_find(0, 0, planes, bits, MP_IMGFLAG_YUV_P);
} else {
*out_format = 0;
}
if (!mp_sws_supported_format(*out_format))
*out_format = IMGFMT_444P; // generic fallback
*out_bits = mp_imgfmt_get_desc(*out_format).component_bits;
}
static struct part *get_cache(struct mp_draw_sub_cache *cache,
struct sub_bitmaps *sbs, struct mp_image *format)
{
struct part *part = NULL;
bool use_cache = sbs->format == SUBBITMAP_RGBA;
if (use_cache) {
part = cache->parts[sbs->render_index];
if (part) {
if (part->change_id != sbs->change_id
|| part->imgfmt != format->imgfmt
|| part->colorspace != format->params.color.space
|| part->levels != format->params.color.levels)
{
talloc_free(part);
part = NULL;
}
}
if (!part) {
part = talloc(cache, struct part);
*part = (struct part) {
.change_id = sbs->change_id,
.num_imgs = sbs->num_parts,
.imgfmt = format->imgfmt,
.levels = format->params.color.levels,
.colorspace = format->params.color.space,
};
part->imgs = talloc_zero_array(part, struct sub_cache,
part->num_imgs);
}
assert(part->num_imgs == sbs->num_parts);
cache->parts[sbs->render_index] = part;
}
return part;
}
// Return area of intersection between target and sub-bitmap as cropped image
static bool get_sub_area(struct mp_rect bb, struct mp_image *temp,
struct sub_bitmap *sb, struct mp_image *out_area,
int *out_src_x, int *out_src_y)
{
// coordinates are relative to the bbox
struct mp_rect dst = {sb->x - bb.x0, sb->y - bb.y0};
dst.x1 = dst.x0 + sb->dw;
dst.y1 = dst.y0 + sb->dh;
if (!mp_rect_intersection(&dst, &(struct mp_rect){0, 0, temp->w, temp->h}))
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;
}
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// 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.color = src->params.color;
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);
}
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return temp;
}
// Undo chroma_up() (copy temp to old_src if needed)
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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
}
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}
}
// 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