Re: [libdc1394-devel] Problems running libdc1394 on intel Mac under rosetta

[Damien D. <ddo...@is...>]

Hello David,

On Tue, 2007-09-25 at 22:11 -0400, David Rokeby wrote:
> I have been trying to get libdc1394 working within a plugin that must
> stay PowerPC native. It works fine on PowerPC machines. On Intel
> machines, it runs properly until the final buffer of the ring buffer,
> then stops. That is to say, if I have 8 DMA buffers, I get seven
> images, and then the capture callback ceases being called, and
> capture_dequeue reports no frame available.
> 
> 
> The capture needs to be set up again before I can read another set of
> images.
> 
> 
> As my immediate needs are only for single images at 30 second
> intervals, I thought I might set up a call to my capture setup code
> (which is based on "InitIOneIDCCamera" from one of the examples) each
> time I wanted a new image, but I have found that this process leaks 2
> mach ports per setup which makes me worry about running this long term
> (which is my intention).
> 
> 
> Any ideas regarding the Rosetta problem or the apparent port leak
> would be appreciated. I am no expert on mach ports, but I am guessing
> the ports are related to either the pipe and/or the socket set up in
> capture_setup. These appear to be being correctly disposed of, but I
> am over my head when it comes to really verifying this.
> 
> 
> basically the setup routine does the following (I am leaving out lots
> of configuration stuff local to my code)
> 
> 
> if( camera -> capture_is_set )
> {
> dc1394_video_set_transmission(camera, DC1394_OFF);
> dc1394_capture_stop( camera); 
> }
> dc1394_video_set_iso_speed( camera, isoSpeed ); 
> dc1394_video_set_mode( camera, mode );
> dc1394_video_set_framerate( v -> camera, rate );
> dc1394_capture_setup( camera, 8, DC1394_CAPTURE_FLAGS_DEFAULT );
> dc1394_video_set_transmission(camera, DC1394_ON);
> 
> 
> It looks to me like dc1394_capture_stop() cleans up all the possible
> ports created by dc1394_capture_setup(), but I must be missing
> something...

Are you regularly enqueuing the buffers that you have dequeued? I
suppose you do since it works on mac but it's better to check this
twice ;) 

Damien


-- 
  _    Damien 高原 Douxchamps
 ('-   Assistant Professor
 //\   Image Processing Laboratory, NAIST
 V_/_  http://damien.douxchamps.net/