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Diffstat (limited to '')
| -rw-r--r-- | sub/ass_mp.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/sub/ass_mp.c b/sub/ass_mp.c new file mode 100644 index 0000000..634681f --- /dev/null +++ b/sub/ass_mp.c @@ -0,0 +1,422 @@ +/* + * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com> + * + * This file is part of mpv. + * + * 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 + * GNU Lesser General Public License for more details. + * + * 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 <inttypes.h> +#include <string.h> +#include <stdlib.h> +#include <stdarg.h> +#include <stdbool.h> +#include <assert.h> +#include <math.h> + +#include <ass/ass.h> +#include <ass/ass_types.h> + +#include "common/common.h" +#include "common/global.h" +#include "common/msg.h" +#include "options/path.h" +#include "ass_mp.h" +#include "img_convert.h" +#include "osd.h" +#include "stream/stream.h" +#include "options/options.h" +#include "video/out/bitmap_packer.h" +#include "video/mp_image.h" + +// res_y should be track->PlayResY +// It determines scaling of font sizes and more. +void mp_ass_set_style(ASS_Style *style, double res_y, + const struct osd_style_opts *opts) +{ + if (!style) + return; + + if (opts->font) { + if (!style->FontName || strcmp(style->FontName, opts->font) != 0) { + free(style->FontName); + style->FontName = strdup(opts->font); + } + } + + // libass_font_size = FontSize * (window_height / res_y) + // scale translates parameters from PlayResY=720 to res_y + double scale = res_y / 720.0; + + style->FontSize = opts->font_size * scale; + style->PrimaryColour = MP_ASS_COLOR(opts->color); + style->SecondaryColour = style->PrimaryColour; + style->OutlineColour = MP_ASS_COLOR(opts->border_color); + if (opts->back_color.a) { + style->BackColour = MP_ASS_COLOR(opts->back_color); + style->BorderStyle = 4; // opaque box + } else { + style->BackColour = MP_ASS_COLOR(opts->shadow_color); + style->BorderStyle = 1; // outline + } + style->Outline = opts->border_size * scale; + style->Shadow = opts->shadow_offset * scale; + style->Spacing = opts->spacing * scale; + style->MarginL = opts->margin_x * scale; + style->MarginR = style->MarginL; + style->MarginV = opts->margin_y * scale; + style->ScaleX = 1.; + style->ScaleY = 1.; + style->Alignment = 1 + (opts->align_x + 1) + (opts->align_y + 2) % 3 * 4; +#ifdef ASS_JUSTIFY_LEFT + style->Justify = opts->justify; +#endif + style->Blur = opts->blur; + style->Bold = opts->bold; + style->Italic = opts->italic; +} + +void mp_ass_configure_fonts(ASS_Renderer *priv, struct osd_style_opts *opts, + struct mpv_global *global, struct mp_log *log) +{ + void *tmp = talloc_new(NULL); + char *default_font = mp_find_config_file(tmp, global, "subfont.ttf"); + char *config = mp_find_config_file(tmp, global, "fonts.conf"); + + if (default_font && !mp_path_exists(default_font)) + default_font = NULL; + + int font_provider = ASS_FONTPROVIDER_AUTODETECT; + if (opts->font_provider == 1) + font_provider = ASS_FONTPROVIDER_NONE; + if (opts->font_provider == 2) + font_provider = ASS_FONTPROVIDER_FONTCONFIG; + + mp_verbose(log, "Setting up fonts...\n"); + ass_set_fonts(priv, default_font, opts->font, font_provider, config, 1); + mp_verbose(log, "Done.\n"); + + talloc_free(tmp); +} + +static const int map_ass_level[] = { + MSGL_ERR, // 0 "FATAL errors" + MSGL_WARN, + MSGL_INFO, + MSGL_V, + MSGL_V, + MSGL_DEBUG, // 5 application recommended level + MSGL_TRACE, + MSGL_TRACE, // 7 "verbose DEBUG" +}; + +static void message_callback(int level, const char *format, va_list va, void *ctx) +{ + struct mp_log *log = ctx; + if (!log) + return; + level = map_ass_level[level]; + mp_msg_va(log, level, format, va); + // libass messages lack trailing \n + mp_msg(log, level, "\n"); +} + +ASS_Library *mp_ass_init(struct mpv_global *global, + struct osd_style_opts *opts, struct mp_log *log) +{ + char *path = opts->fonts_dir && opts->fonts_dir[0] ? + mp_get_user_path(NULL, global, opts->fonts_dir) : + mp_find_config_file(NULL, global, "fonts"); + mp_dbg(log, "ASS library version: 0x%x (runtime 0x%x)\n", + (unsigned)LIBASS_VERSION, ass_library_version()); + ASS_Library *priv = ass_library_init(); + if (!priv) + abort(); + ass_set_message_cb(priv, message_callback, log); + if (path) + ass_set_fonts_dir(priv, path); + talloc_free(path); + return priv; +} + +void mp_ass_flush_old_events(ASS_Track *track, long long ts) +{ + int n = 0; + for (; n < track->n_events; n++) { + if ((track->events[n].Start + track->events[n].Duration) >= ts) + break; + ass_free_event(track, n); + track->n_events--; + } + for (int i = 0; n > 0 && i < track->n_events; i++) { + track->events[i] = track->events[i+n]; + } +} + +static void draw_ass_rgba(unsigned char *src, int src_w, int src_h, + int src_stride, unsigned char *dst, size_t dst_stride, + int dst_x, int dst_y, uint32_t color) +{ + const unsigned int r = (color >> 24) & 0xff; + const unsigned int g = (color >> 16) & 0xff; + const unsigned int b = (color >> 8) & 0xff; + const unsigned int a = 0xff - (color & 0xff); + + dst += dst_y * dst_stride + dst_x * 4; + + for (int y = 0; y < src_h; y++, dst += dst_stride, src += src_stride) { + uint32_t *dstrow = (uint32_t *) dst; + for (int x = 0; x < src_w; x++) { + const unsigned int v = src[x]; + int rr = (r * a * v); + int gg = (g * a * v); + int bb = (b * a * v); + int aa = a * v; + uint32_t dstpix = dstrow[x]; + unsigned int dstb = dstpix & 0xFF; + unsigned int dstg = (dstpix >> 8) & 0xFF; + unsigned int dstr = (dstpix >> 16) & 0xFF; + unsigned int dsta = (dstpix >> 24) & 0xFF; + dstb = (bb + dstb * (255 * 255 - aa)) / (255 * 255); + dstg = (gg + dstg * (255 * 255 - aa)) / (255 * 255); + dstr = (rr + dstr * (255 * 255 - aa)) / (255 * 255); + dsta = (aa * 255 + dsta * (255 * 255 - aa)) / (255 * 255); + dstrow[x] = dstb | (dstg << 8) | (dstr << 16) | (dsta << 24); + } + } +} + +struct mp_ass_packer { + struct sub_bitmap *cached_parts; // only for the array memory + struct mp_image *cached_img; + struct sub_bitmaps cached_subs; + bool cached_subs_valid; + struct sub_bitmap rgba_imgs[MP_SUB_BB_LIST_MAX]; + struct bitmap_packer *packer; +}; + +// Free with talloc_free(). +struct mp_ass_packer *mp_ass_packer_alloc(void *ta_parent) +{ + struct mp_ass_packer *p = talloc_zero(ta_parent, struct mp_ass_packer); + p->packer = talloc_zero(p, struct bitmap_packer); + return p; +} + +static bool pack(struct mp_ass_packer *p, struct sub_bitmaps *res, int imgfmt) +{ + packer_set_size(p->packer, res->num_parts); + + for (int n = 0; n < res->num_parts; n++) + p->packer->in[n] = (struct pos){res->parts[n].w, res->parts[n].h}; + + if (p->packer->count == 0 || packer_pack(p->packer) < 0) + return false; + + struct pos bb[2]; + packer_get_bb(p->packer, bb); + + res->packed_w = bb[1].x; + res->packed_h = bb[1].y; + + if (!p->cached_img || p->cached_img->w < res->packed_w || + p->cached_img->h < res->packed_h || + p->cached_img->imgfmt != imgfmt) + { + talloc_free(p->cached_img); + p->cached_img = mp_image_alloc(imgfmt, p->packer->w, p->packer->h); + if (!p->cached_img) { + packer_reset(p->packer); + return false; + } + talloc_steal(p, p->cached_img); + } + + if (!mp_image_make_writeable(p->cached_img)) { + packer_reset(p->packer); + return false; + } + + res->packed = p->cached_img; + + for (int n = 0; n < res->num_parts; n++) { + struct sub_bitmap *b = &res->parts[n]; + struct pos pos = p->packer->result[n]; + + b->src_x = pos.x; + b->src_y = pos.y; + } + + return true; +} + +static bool pack_libass(struct mp_ass_packer *p, struct sub_bitmaps *res) +{ + if (!pack(p, res, IMGFMT_Y8)) + return false; + + for (int n = 0; n < res->num_parts; n++) { + struct sub_bitmap *b = &res->parts[n]; + + int stride = res->packed->stride[0]; + void *pdata = + (uint8_t *)res->packed->planes[0] + b->src_y * stride + b->src_x; + memcpy_pic(pdata, b->bitmap, b->w, b->h, stride, b->stride); + + b->bitmap = pdata; + b->stride = stride; + } + + return true; +} + +static bool pack_rgba(struct mp_ass_packer *p, struct sub_bitmaps *res) +{ + struct mp_rect bb_list[MP_SUB_BB_LIST_MAX]; + int num_bb = mp_get_sub_bb_list(res, bb_list, MP_SUB_BB_LIST_MAX); + + struct sub_bitmaps imgs = { + .change_id = res->change_id, + .format = SUBBITMAP_BGRA, + .parts = p->rgba_imgs, + .num_parts = num_bb, + }; + + for (int n = 0; n < imgs.num_parts; n++) { + imgs.parts[n].w = bb_list[n].x1 - bb_list[n].x0; + imgs.parts[n].h = bb_list[n].y1 - bb_list[n].y0; + } + + if (!pack(p, &imgs, IMGFMT_BGRA)) + return false; + + for (int n = 0; n < num_bb; n++) { + struct mp_rect bb = bb_list[n]; + struct sub_bitmap *b = &imgs.parts[n]; + + b->x = bb.x0; + b->y = bb.y0; + b->w = b->dw = bb.x1 - bb.x0; + b->h = b->dh = bb.y1 - bb.y0; + b->stride = imgs.packed->stride[0]; + b->bitmap = (uint8_t *)imgs.packed->planes[0] + + b->stride * b->src_y + b->src_x * 4; + + memset_pic(b->bitmap, 0, b->w * 4, b->h, b->stride); + + for (int i = 0; i < res->num_parts; i++) { + struct sub_bitmap *s = &res->parts[i]; + + // Assume mp_get_sub_bb_list() never splits sub bitmaps + // So we don't clip/adjust the size of the sub bitmap + if (s->x > bb.x1 || s->x + s->w < bb.x0 || + s->y > bb.y1 || s->y + s->h < bb.y0) + continue; + + draw_ass_rgba(s->bitmap, s->w, s->h, s->stride, + b->bitmap, b->stride, + s->x - bb.x0, s->y - bb.y0, + s->libass.color); + } + } + + *res = imgs; + return true; +} + +// Pack the contents of image_lists[0] to image_lists[num_image_lists-1] into +// a single image, and make *out point to it. *out is completely overwritten. +// If libass reported any change, image_lists_changed must be set (it then +// repacks all images). preferred_osd_format can be set to a desired +// sub_bitmap_format. Currently, only SUBBITMAP_LIBASS is supported. +void mp_ass_packer_pack(struct mp_ass_packer *p, ASS_Image **image_lists, + int num_image_lists, bool image_lists_changed, + int preferred_osd_format, struct sub_bitmaps *out) +{ + int format = preferred_osd_format == SUBBITMAP_BGRA ? SUBBITMAP_BGRA + : SUBBITMAP_LIBASS; + + if (p->cached_subs_valid && !image_lists_changed && + p->cached_subs.format == format) + { + *out = p->cached_subs; + return; + } + + *out = (struct sub_bitmaps){.change_id = 1}; + p->cached_subs_valid = false; + + struct sub_bitmaps res = { + .change_id = image_lists_changed, + .format = SUBBITMAP_LIBASS, + .parts = p->cached_parts, + }; + + for (int n = 0; n < num_image_lists; n++) { + for (struct ass_image *img = image_lists[n]; img; img = img->next) { + if (img->w == 0 || img->h == 0) + continue; + MP_TARRAY_GROW(p, p->cached_parts, res.num_parts); + res.parts = p->cached_parts; + struct sub_bitmap *b = &res.parts[res.num_parts]; + b->bitmap = img->bitmap; + b->stride = img->stride; + b->libass.color = img->color; + b->dw = b->w = img->w; + b->dh = b->h = img->h; + b->x = img->dst_x; + b->y = img->dst_y; + res.num_parts++; + } + } + + bool r = false; + if (format == SUBBITMAP_BGRA) { + r = pack_rgba(p, &res); + } else { + r = pack_libass(p, &res); + } + + if (!r) + return; + + *out = res; + p->cached_subs = res; + p->cached_subs.change_id = 0; + p->cached_subs_valid = true; +} + +// Set *out_rc to [x0, y0, x1, y1] of the graphical bounding box in script +// coordinates. +// Set it to [inf, inf, -inf, -inf] if empty. +void mp_ass_get_bb(ASS_Image *image_list, ASS_Track *track, + struct mp_osd_res *res, double *out_rc) +{ + double rc[4] = {INFINITY, INFINITY, -INFINITY, -INFINITY}; + + for (ASS_Image *img = image_list; img; img = img->next) { + if (img->w == 0 || img->h == 0) + continue; + rc[0] = MPMIN(rc[0], img->dst_x); + rc[1] = MPMIN(rc[1], img->dst_y); + rc[2] = MPMAX(rc[2], img->dst_x + img->w); + rc[3] = MPMAX(rc[3], img->dst_y + img->h); + } + + double scale = track->PlayResY / (double)MPMAX(res->h, 1); + if (scale > 0) { + for (int i = 0; i < 4; i++) + out_rc[i] = rc[i] * scale; + } +} |