Aegisub/aegisub/libmedia/common/video_frame.cpp

117 lines
2.7 KiB
C++

// Copyright (c) 2007, Rodrigo Braz Monteiro <amz@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// $Id$
/// @file video_frame.cpp
/// @brief Wrapper around a frame of video data
/// @ingroup video
///
#include "config.h"
#include "libmedia/video_frame.h"
#ifndef LAGI_PRE
#include <assert.h>
#include <string.h>
#endif
namespace media {
void AegiVideoFrame::Reset() {
// Zero variables
data = 0;
pitch = 0;
memSize = 0;
w = 0;
h = 0;
// Set properties
flipped = false;
invertChannels = true;
ownMem = true;
}
AegiVideoFrame::AegiVideoFrame() {
Reset();
}
/// @brief Create a solid black frame of the request size and format
/// @param width
/// @param height
AegiVideoFrame::AegiVideoFrame(unsigned int width, unsigned int height) {
assert(width > 0 && width < 10000);
assert(height > 0 && height < 10000);
Reset();
// Set format
w = width;
h = height;
pitch = w * GetBpp();
Allocate();
memset(data, 0, pitch * height);
}
void AegiVideoFrame::Allocate() {
assert(pitch > 0 && pitch < 10000);
assert(w > 0 && w < 10000);
assert(h > 0 && h < 10000);
unsigned int size = pitch * h;
// Reallocate, if necessary
if (memSize != size || !ownMem) {
if (ownMem) {
delete[] data;
}
data = new unsigned char[size];
memSize = size;
}
ownMem = true;
}
void AegiVideoFrame::Clear() {
if (ownMem) delete[] data;
Reset();
}
void AegiVideoFrame::CopyFrom(const AegiVideoFrame &source) {
w = source.w;
h = source.h;
pitch = source.pitch;
Allocate();
memcpy(data, source.data, memSize);
flipped = source.flipped;
invertChannels = source.invertChannels;
}
void AegiVideoFrame::SetTo(const unsigned char *source, unsigned int width, unsigned int height, unsigned int pitch) {
assert(pitch > 0 && pitch < 10000);
assert(width > 0 && width < 10000);
assert(height > 0 && height < 10000);
ownMem = false;
w = width;
h = height;
// Note that despite this cast, the contents of data should still never be modified
data = const_cast<unsigned char*>(source);
this->pitch = pitch;
}
} // namespace media