Add initial video playback support for Ogg Theora videos (resolves issue #66.)

The basic APIs are:

video = love.graphics.newVideo("myvideo.ogv")

love.graphics.draw(video, ...) -- Video objects are Drawables.

video:play(), video:pause()

video:getDuration(), video:tell(), video:rewind(), video:seek(seconds)

video:getSource()

video:getWidth(), video:getHeight(), video:setFilter(min, mag)

More advanced APIs include video:setSource(source), video:getStream(), and videostream:setSync.

To use a custom pixel shader when drawing a Video, call the new TexelVideo(texcoords) function instead of Texel(texture, texcoords) in order to get the pixel colors of a video frame.

src/modules/video/VideoStream.cpp

@@ -0,0 +1,168 @@
+/**
+ * Copyright (c) 2006-2015 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#include "VideoStream.h"
+
+using love::thread::Lock;
+
+namespace love
+{
+namespace video
+{
+
+void VideoStream::setSync(VideoStream::FrameSync *frameSync)
+{
+	this->frameSync = frameSync;
+}
+
+VideoStream::FrameSync *VideoStream::getSync() const
+{
+	return frameSync;
+}
+
+void VideoStream::play()
+{
+	frameSync->play();
+}
+
+void VideoStream::pause()
+{
+	frameSync->pause();
+}
+
+void VideoStream::seek(double offset)
+{
+	frameSync->seek(offset);
+}
+
+double VideoStream::tell()
+{
+	return frameSync->tell();
+}
+
+bool VideoStream::isPlaying()
+{
+	return frameSync->isPlaying();
+}
+
+VideoStream::Frame::Frame()
+	: yplane(nullptr)
+	, cbplane(nullptr)
+	, crplane(nullptr)
+{
+}
+
+VideoStream::Frame::~Frame()
+{
+	delete[] yplane;
+	delete[] cbplane;
+	delete[] crplane;
+}
+
+void VideoStream::FrameSync::copyState(const VideoStream::FrameSync *other)
+{
+	seek(other->tell());
+	if (other->isPlaying())
+		play();
+	else
+		pause();
+}
+
+double VideoStream::FrameSync::tell() const
+{
+	return getPosition();
+}
+
+VideoStream::DeltaSync::DeltaSync()
+	: playing(false)
+	, position(0)
+	, speed(1)
+{
+}
+
+VideoStream::DeltaSync::~DeltaSync()
+{
+}
+
+double VideoStream::DeltaSync::getPosition() const
+{
+	return position;
+}
+
+void VideoStream::DeltaSync::update(double dt)
+{
+	Lock l(mutex);
+	if (playing)
+		position += dt*speed;
+}
+
+void VideoStream::DeltaSync::play()
+{
+	playing = true;
+}
+
+void VideoStream::DeltaSync::pause()
+{
+	playing = false;
+}
+
+void VideoStream::DeltaSync::seek(double time)
+{
+	Lock l(mutex);
+	position = time;
+}
+
+bool VideoStream::DeltaSync::isPlaying() const
+{
+	return playing;
+}
+
+VideoStream::SourceSync::SourceSync(love::audio::Source *source)
+	: source(source)
+{
+}
+
+double VideoStream::SourceSync::getPosition() const
+{
+	return source->tell(love::audio::Source::UNIT_SECONDS);
+}
+
+void VideoStream::SourceSync::play()
+{
+	source->play();
+}
+
+void VideoStream::SourceSync::pause()
+{
+	source->pause();
+}
+
+void VideoStream::SourceSync::seek(double time)
+{
+	source->seek(time, love::audio::Source::UNIT_SECONDS);
+}
+
+bool VideoStream::SourceSync::isPlaying() const
+{
+	return !source->isStopped() && !source->isPaused();
+}
+
+} // video
+} // love