125 lines
5.1 KiB
C++
125 lines
5.1 KiB
C++
// Copyright (c) 2007, Rodrigo Braz Monteiro
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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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// Aegisub Project http://www.aegisub.org/
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/// @file video_provider_dummy.cpp
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/// @brief Video provider returning a constant frame
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/// @ingroup video_input
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///
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#include "video_provider_dummy.h"
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#include "colorspace.h"
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#include "video_frame.h"
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#include <libaegisub/color.h>
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#include <libaegisub/fs.h>
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#include <libaegisub/util.h>
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#include <boost/algorithm/string/classification.hpp>
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/algorithm/string/split.hpp>
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#include <boost/format.hpp>
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#include <boost/gil/gil_all.hpp>
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DummyVideoProvider::DummyVideoProvider(double fps, int frames, int width, int height, agi::Color colour, bool pattern)
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: framecount(frames)
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, fps(fps)
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, width(width)
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, height(height)
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{
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data.resize(width * height * 4);
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auto red = colour.r;
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auto green = colour.g;
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auto blue = colour.b;
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using namespace boost::gil;
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auto dst = interleaved_view(width, height, (bgra8_pixel_t*)data.data(), 4 * width);
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bgra8_pixel_t colors[2] = {
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bgra8_pixel_t(blue, green, red, 0),
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bgra8_pixel_t(blue, green, red, 0)
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};
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if (pattern) {
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// Generate light version
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unsigned char h, s, l;
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rgb_to_hsl(red, blue, green, &h, &s, &l);
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l += 24;
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if (l < 24) l -= 48;
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hsl_to_rgb(h, s, l, &red, &blue, &green);
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colors[1] = bgra8_pixel_t(blue, green, red, 0);
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// Divide into a 8x8 grid and use light colours when row % 2 != col % 2
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auto out = dst.begin();
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for (int y = 0; y < height; ++y)
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for (int x = 0; x < width; ++x)
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*out++ = colors[((y / 8) & 1) != ((x / 8) & 1)];
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}
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else {
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fill_pixels(dst, colors[0]);
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}
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}
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std::string DummyVideoProvider::MakeFilename(double fps, int frames, int width, int height, agi::Color colour, bool pattern) {
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return str(boost::format("?dummy:%f:%d:%d:%d:%d:%d:%d:%s") % fps % frames % width % height % (int)colour.r % (int)colour.g % (int)colour.b % (pattern ? "c" : ""));
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}
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std::shared_ptr<VideoFrame> DummyVideoProvider::GetFrame(int) {
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return std::make_shared<VideoFrame>(data.data(), width, height, width * 4, false);
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}
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namespace agi { class BackgroundRunner; }
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std::unique_ptr<VideoProvider> CreateDummyVideoProvider(agi::fs::path const& filename, std::string const&, agi::BackgroundRunner *) {
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if (!boost::starts_with(filename.string(), "?dummy"))
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return {};
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std::vector<std::string> toks;
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auto const& fields = filename.string().substr(7);
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boost::split(toks, fields, boost::is_any_of(":"));
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if (toks.size() != 8)
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throw VideoOpenError("Too few fields in dummy video parameter list");
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size_t i = 0;
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double fps;
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int frames, width, height, red, green, blue;
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using agi::util::try_parse;
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if (!try_parse(toks[i++], &fps)) throw VideoOpenError("Unable to parse fps field in dummy video parameter list");
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if (!try_parse(toks[i++], &frames)) throw VideoOpenError("Unable to parse framecount field in dummy video parameter list");
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if (!try_parse(toks[i++], &width)) throw VideoOpenError("Unable to parse width field in dummy video parameter list");
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if (!try_parse(toks[i++], &height)) throw VideoOpenError("Unable to parse height field in dummy video parameter list");
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if (!try_parse(toks[i++], &red)) throw VideoOpenError("Unable to parse red colour field in dummy video parameter list");
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if (!try_parse(toks[i++], &green)) throw VideoOpenError("Unable to parse green colour field in dummy video parameter list");
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if (!try_parse(toks[i++], &blue)) throw VideoOpenError("Unable to parse blue colour field in dummy video parameter list");
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bool pattern = toks[i] == "c";
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return agi::util::make_unique<DummyVideoProvider>(fps, frames, width, height, agi::Color(red, green, blue), pattern);
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}
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