mirror of https://github.com/odrling/Aegisub
Removed the old libass cpp to avoid confusion.
Originally committed to SVN as r1001.
This commit is contained in:
Rodrigo Braz Monteiro
parent
29072f75af
commit
f15c03b1cc
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// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
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// Copyright (c) 2006, Evgeniy Stepanov
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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///////////
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// Headers
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#ifdef HAVE_LIBASS
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#include <wx/wxprec.h>
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#include <wx/image.h>
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#include "subtitle_provider.h"
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#include "video_provider.h"
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#include "ass_file.h"
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extern "C" {
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#include <ass/ass.h>
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}
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class SubtitleProviderLibASS : public SubtitleProvider, SubtitleProvider::Overlay {
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private:
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class MyClass : public Class {
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public:
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MyClass() : Class(L"libass") {
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ass_library = ass_library_init();
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if (!ass_library) throw _T("ass_library_init failed");
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ass_set_fonts_dir(ass_library, "");
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ass_set_extract_fonts(ass_library, 0);
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ass_set_style_overrides(ass_library, NULL);
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};
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virtual SubtitleProvider *Get(AssFile *subs) { return new SubtitleProviderLibASS(subs); };
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};
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static MyClass me;
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static ass_library_t* ass_library;
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ass_renderer_t* ass_renderer;
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ass_track_t* ass_track;
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wxString last_sub;
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AssFile *subs;
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VideoProvider *vpro;
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public:
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SubtitleProviderLibASS(AssFile *_subs);
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virtual ~SubtitleProviderLibASS();
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virtual void Bind(VideoProvider *_vpro);
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virtual void SetParams(int width, int height);
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virtual void Render(wxImage &frame, int ms);
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virtual void Unbind();
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};
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SubtitleProviderLibASS::MyClass SubtitleProviderLibASS::me;
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ass_library_t* SubtitleProviderLibASS::ass_library;
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SubtitleProviderLibASS::SubtitleProviderLibASS(AssFile *_subs) : ass_track(NULL)
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{
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subs = _subs;
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wxString text = subs->GetString();
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ass_renderer = ass_renderer_init(ass_library);
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if (!ass_renderer) throw _T("ass_renderer_init failed");
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//ass_set_margins(ass_renderer, 0, 0, 0, 0);
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//ass_set_use_margins(ass_renderer, 0);
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ass_set_font_scale(ass_renderer, 1.);
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ass_set_fonts(ass_renderer, NULL, "Sans");
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};
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SubtitleProviderLibASS::~SubtitleProviderLibASS()
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{
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Unbind();
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//asa_close(inst);
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};
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void SubtitleProviderLibASS::Bind(VideoProvider *_vpro)
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{
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vpro = _vpro;
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vpro->AttachOverlay(this);
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}
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void SubtitleProviderLibASS::SetParams(int width, int height)
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{
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ass_set_frame_size(ass_renderer, width, height);
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}
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#define _r(c) ((c)>>24)
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#define _g(c) (((c)>>16)&0xFF)
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#define _b(c) (((c)>>8)&0xFF)
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#define _a(c) ((c)&0xFF)
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static void blend_single(wxImage &frame, ass_image_t* img) {
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unsigned char opacity = 255 - _a(img->color);
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unsigned char r = _r(img->color);
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unsigned char g = _g(img->color);
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unsigned char b = _b(img->color);
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int dst_stride = frame.GetWidth() * 3;
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unsigned char* src;
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unsigned char* dst;
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src = img->bitmap;
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dst = frame.GetData() + img->dst_y * dst_stride + img->dst_x * 3;
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for (int y = 0; y < img->h; ++y) {
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for (int x = 0; x < img->w; ++x) {
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unsigned k = ((unsigned)src[x]) * opacity / 255;
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// possible endianness problems
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dst[x*3] = (k*r + (255-k)*dst[x*3]) / 255;
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dst[x*3+1] = (k*g + (255-k)*dst[x*3+1]) / 255;
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dst[x*3+2] = (k*b + (255-k)*dst[x*3+2]) / 255;
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}
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src += img->stride;
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dst += dst_stride;
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}
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}
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static void blend(wxImage &frame, ass_image_t* img) {
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int cnt = 0;
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while (img) {
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blend_single(frame, img);
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++cnt;
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img = img->next;
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}
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}
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void SubtitleProviderLibASS::Render(wxImage &frame, int ms)
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{
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wxString text = subs->GetString();
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if (text != last_sub) { // almost always true because of "Video Position" header
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if (ass_track)
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ass_free_track(ass_track);
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ass_track = ass_read_memory(ass_library, ((char*)text.GetData()) + 4, sizeof(wchar_t) * text.Length() - 4, "UCS-4LE");
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}
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if (!ass_track)
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throw _T("libass parse error");
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ass_image_t* img = ass_render_frame(ass_renderer, ass_track, ms);
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blend(frame, img);
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}
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void SubtitleProviderLibASS::Unbind()
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{
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if (vpro)
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vpro->AttachOverlay(NULL);
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vpro = NULL;
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}
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#endif /* HAVE_LIBASS */
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