forked from mia/Aegisub
118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
// Copyright (c) 2007, Rodrigo Braz Monteiro <amz@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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// $Id$
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/// @file video_frame.cpp
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/// @brief Wrapper around a frame of video data
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/// @ingroup video
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///
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#include "config.h"
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#include "libaegisub/media_video_frame.h"
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#ifndef LAGI_PRE
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#include <assert.h>
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#include <string.h>
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#endif
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namespace agi {
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namespace media {
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void AegiVideoFrame::Reset() {
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// Zero variables
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data = 0;
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pitch = 0;
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memSize = 0;
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w = 0;
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h = 0;
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// Set properties
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flipped = false;
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invertChannels = true;
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ownMem = true;
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}
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AegiVideoFrame::AegiVideoFrame() {
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Reset();
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}
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/// @brief Create a solid black frame of the request size and format
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/// @param width
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/// @param height
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AegiVideoFrame::AegiVideoFrame(unsigned int width, unsigned int height) {
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assert(width > 0 && width < 10000);
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assert(height > 0 && height < 10000);
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Reset();
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// Set format
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w = width;
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h = height;
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pitch = w * GetBpp();
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Allocate();
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memset(data, 0, pitch * height);
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}
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void AegiVideoFrame::Allocate() {
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assert(pitch > 0 && pitch < 10000);
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assert(w > 0 && w < 10000);
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assert(h > 0 && h < 10000);
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unsigned int size = pitch * h;
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// Reallocate, if necessary
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if (memSize != size || !ownMem) {
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if (ownMem) {
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delete[] data;
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}
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data = new unsigned char[size];
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memSize = size;
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}
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ownMem = true;
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}
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void AegiVideoFrame::Clear() {
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if (ownMem) delete[] data;
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Reset();
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}
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void AegiVideoFrame::CopyFrom(const AegiVideoFrame &source) {
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w = source.w;
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h = source.h;
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pitch = source.pitch;
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Allocate();
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memcpy(data, source.data, memSize);
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flipped = source.flipped;
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invertChannels = source.invertChannels;
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}
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void AegiVideoFrame::SetTo(const unsigned char *source, unsigned int width, unsigned int height, unsigned int pitch) {
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assert(pitch > 0 && pitch < 10000);
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assert(width > 0 && width < 10000);
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assert(height > 0 && height < 10000);
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ownMem = false;
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w = width;
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h = height;
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// Note that despite this cast, the contents of data should still never be modified
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data = const_cast<unsigned char*>(source);
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this->pitch = pitch;
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}
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} // namespace media
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} // namespace agi
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