$10+$10 Lua or c++: Read A->B Loop times at runtime programmatically
Posted: 09 May 2017 07:03
I am not a programmer, sorry, i'm just hacking together a tool to make my life easier, and maybe a couple of other peepz on reddit it's just auto layout of A-B loops saving and restoring, nothing fancy.I will award $10 (PayPal etc) to the provider of the solution, and also donate $10 to VideoLAN/VLC and send proof here.
- I don't really want to use the Clipper Addon, it's too much for what I need and the interface is just a tad confusing. - I'll only use/mod it, if this method does not work.
Requirement:
I need to pragmatically read the two A->B Loop time variables from running VLC instances on Windows 10, from outside VLC/like when I run an AHK script.
I literally just need the code to read timeA from lua interface and I'm golden but any advice welcome.
Problem is I can't find how to access them from Lua, and not sure if it's even possbile without editing c++ source and compiling etc:
The Private VARIABLES in the SOURCE are:
timeA
timeB
Seems to me they are part of some kind of object called InputManager, which is in the qt4 gui module which I think is an interface.
In the source tree, they are in the following two files (these are code extracts just showing where they occur, with unnecessary code omitted.
vlc-2.2.4\modules\gui\qt4\input_manager.hpp
(near the bottom of this extract)
Code: Select all
public:
InputManager( QObject *, intf_thread_t * );
virtual ~InputManager();
void delInput();
bool hasInput()
{
return p_input /* We have an input */
&& !p_input->b_dead /* not dead yet, */
&& !p_input->b_eof /* not EOF either */;
}
int playingStatus();
bool hasAudio();
bool hasVideo() { return hasInput() && b_video; }
bool hasVisualisation();
void requestArtUpdate( input_item_t *p_item, bool b_forced );
void setArt( input_item_t *p_item, QString fileUrl );
QString getName() { return oldName; }
static const QString decodeArtURL( input_item_t *p_item );
private:
intf_thread_t *p_intf;
input_thread_t *p_input;
vlc_object_t *p_input_vbi;
input_item_t *p_item;
int i_old_playing_status;
QString oldName;
QString lastURI;
QString artUrl;
float f_rate;
float f_cache;
bool b_video;
mtime_t timeA, timeB;
void customEvent( QEvent * );Code: Select all
InputManager::InputManager( QObject *parent, intf_thread_t *_p_intf) :
QObject( parent ), p_intf( _p_intf )
{
i_old_playing_status = END_S;
oldName = "";
artUrl = "";
p_input = NULL;
p_input_vbi = NULL;
f_rate = 0.;
p_item = NULL;
b_video = false;
timeA = 0;
timeB = 0;
f_cache = -1.; /* impossible initial value, different from all */
registerAndCheckEventIds( IMEvent::PositionUpdate, IMEvent::FullscreenControlPlanHide );
registerAndCheckEventIds( PLEvent::PLItemAppended, PLEvent::PLEmpty );
}
.. code removed for convenience ..
delCallbacks();
i_old_playing_status = END_S;
p_item = NULL;
oldName = "";
artUrl = "";
b_video = false;
timeA = 0;
timeB = 0;
f_rate = 0. ;
.. code rermoved for convenience ...
void InputManager::setAtoB()
{
if( !timeA )
{
timeA = var_GetTime( THEMIM->getInput(), "time" );
}
else if( !timeB )
{
timeB = var_GetTime( THEMIM->getInput(), "time" );
var_SetTime( THEMIM->getInput(), "time" , timeA );
CONNECT( this, positionUpdated( float, int64_t, int ),
this, AtoBLoop( float, int64_t, int ) );
}
else
{
timeA = 0;
timeB = 0;
disconnect( this, SIGNAL( positionUpdated( float, int64_t, int ) ),
this, SLOT( AtoBLoop( float, int64_t, int ) ) );
}
emit AtoBchanged( (timeA != 0 ), (timeB != 0 ) );
}
/* Function called regularly when in an AtoB loop */
void InputManager::AtoBLoop( float, int64_t i_time, int )
{
if( timeB && i_time >= timeB )
var_SetTime( THEMIM->getInput(), "time" , timeA );
- Provide the required code to read the variables from the Lua interface - I should be able to do the rest.
- (Mod the c++/source & compile) to expose the values to Lua or otherwise programmatically get the values out to somewhere at runtime. Values can be 0 or time values.
- Mod the c++ source to put the A/B time values in the VLC window title or somewhere in running meta data accessible in Lua - I can happily extrapolate at runtime as i'll be using cmdow https://ritchielawrence.github.io/cmdow/ already which can also list full window titles.
- .. any other ideas..
In VLC main (qt4 gui) interface If you cannot see the A->B Loop Button you have to click View->Advanced Controls and it comes up on an extra bar controls, near snapshot i think, also shift+L is the hotkey for it, it adds A then B then clears.
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Thanks for your time!!