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/wrap_VideoStream.cpp

@@ -0,0 +1,131 @@
+/**
+ * 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 "wrap_VideoStream.h"
+
+namespace love
+{
+namespace video
+{
+
+VideoStream *luax_checkvideostream(lua_State *L, int idx)
+{
+	return luax_checktype<VideoStream>(L, idx, VIDEO_VIDEO_STREAM_ID);
+}
+
+int w_VideoStream_setSync(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+
+	if (luax_istype(L, 2, AUDIO_SOURCE_ID))
+	{
+		auto src = luax_totype<love::audio::Source>(L, 2, AUDIO_SOURCE_ID);
+		auto sync = new VideoStream::SourceSync(src);
+		stream->setSync(sync);
+		sync->release();
+	}
+	else if (luax_istype(L, 2, VIDEO_VIDEO_STREAM_ID))
+	{
+		auto other = luax_totype<VideoStream>(L, 2, VIDEO_VIDEO_STREAM_ID);
+		stream->setSync(other->getSync());
+	}
+	else if (lua_isnoneornil(L, 2))
+	{
+		auto newSync = new VideoStream::DeltaSync();
+		newSync->copyState(stream->getSync());
+		stream->setSync(newSync);
+		newSync->release();
+	}
+	else
+		return luax_typerror(L, 2, "Source or VideoStream or nil");
+
+	return 0;
+}
+
+int w_VideoStream_getFilename(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	luax_pushstring(L, stream->getFilename());
+	return 1;
+}
+
+int w_VideoStream_play(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	stream->play();
+	return 0;
+}
+
+int w_VideoStream_pause(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	stream->pause();
+	return 0;
+}
+
+int w_VideoStream_seek(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	double offset = luaL_checknumber(L, 2);
+	stream->seek(offset);
+	return 0;
+}
+
+int w_VideoStream_rewind(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	stream->seek(0);
+	return 0;
+}
+
+int w_VideoStream_tell(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	lua_pushnumber(L, stream->tell());
+	return 1;
+}
+
+int w_VideoStream_isPlaying(lua_State *L)
+{
+	auto stream = luax_checkvideostream(L, 1);
+	luax_pushboolean(L, stream->isPlaying());
+	return 1;
+}
+
+static const luaL_Reg videostream_functions[] =
+{
+	{ "setSync", w_VideoStream_setSync },
+	{ "getFilename", w_VideoStream_getFilename },
+	{ "play", w_VideoStream_play },
+	{ "pause", w_VideoStream_pause },
+	{ "seek", w_VideoStream_seek },
+	{ "rewind", w_VideoStream_rewind },
+	{ "tell", w_VideoStream_tell },
+	{ "isPlaying", w_VideoStream_isPlaying },
+	{ 0, 0 }
+};
+
+int luaopen_videostream(lua_State *L)
+{
+	return luax_register_type(L, VIDEO_VIDEO_STREAM_ID, "VideoStream", videostream_functions, nullptr);
+}
+
+} // video
+} // love