forked from mia/Aegisub
4bdccb889c
At least on OS X, allocating the buffers is one of the more expensive parts of video playback, and on an arbitrary 720p H.264 file with simple subtitles this cuts CPU usage while playing by about 30%.
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// Aegisub Project http://www.aegisub.org/
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#include "video_frame.h"
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#include <boost/gil/gil_all.hpp>
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#include <wx/image.h>
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namespace {
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// We actually have bgr_, not bgra, so we need a custom converter which ignores the alpha channel
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struct color_converter {
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template <typename P1, typename P2>
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void operator()(P1 const& src, P2& dst) const {
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using namespace boost::gil;
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dst = rgb8_pixel_t(
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get_color(src, red_t()),
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get_color(src, green_t()),
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get_color(src, blue_t()));
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}
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};
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}
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wxImage GetImage(VideoFrame const& frame) {
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using namespace boost::gil;
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wxImage img(frame.width, frame.height);
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auto src = interleaved_view(frame.width, frame.height, (bgra8_pixel_t*)frame.data.data(), frame.pitch);
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auto dst = interleaved_view(frame.width, frame.height, (rgb8_pixel_t*)img.GetData(), 3 * frame.width);
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if (frame.flipped)
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src = flipped_up_down_view(src);
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copy_and_convert_pixels(src, dst, color_converter());
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return img;
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}
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