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[Linphone-developers] problem with video output filter?
From: |
Vadim Lebedev |
Subject: |
[Linphone-developers] problem with video output filter? |
Date: |
Wed, 03 Dec 2008 16:22:16 +0100 |
User-agent: |
Thunderbird 2.0.0.17 (X11/20080925) |
Hello,
I've built mediastreamer2 (on linux) from latest linphone svn
And i'm testing video functionality with videodisplay.c test app (i'm
attaching modfiied source)
It mostly works but there are couple of quirks:
When i start the app the it shows the camera feed in the window
After "attaching tee filter message" the window is black for 400 frames
Then for 4 periods of 400 frames i see the small ovrelay window in each
of the 4 corners
then 400 more frames without corner overlay
after the message "detaching tee filter" the window becomes black.
It seems something bad happens when attaching/detaching tee filter and
which fixes itself when SET_CORNER is done
Thanks
Vadim
/*
mediastreamer2 library - modular sound and video processing and streaming
Copyright (C) 2006 Simon MORLAT (address@hidden)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "mediastreamer2/mediastream.h"
#include "mediastreamer2/msvideoout.h"
#include "mediastreamer2/msv4l.h"
int main(int argc, char *argv[]){
VideoStream *vs;
MSWebCam *cam;
MSVideoSize vsize;
int i;
vsize.width=MS_VIDEO_SIZE_CIF_W;
vsize.height=MS_VIDEO_SIZE_CIF_H;
ortp_init();
ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR|ORTP_FATAL);
ms_init();
cam=ms_web_cam_manager_get_default_cam(ms_web_cam_manager_get());
/* this is to test the sequence start/stop */
for(i=0;i<1;++i){
int n;
vs=video_preview_start(cam,vsize);
for(n=0;n<3200;++n){
#ifdef WIN32
MSG msg;
Sleep(100);
while (PeekMessage(&msg, NULL, 0, 0,1)){
TranslateMessage(&msg);
DispatchMessage(&msg);
}
#else
struct timespec ts;
ts.tv_sec=0;
ts.tv_nsec=10000000;
nanosleep(&ts,NULL);
if (vs) video_stream_iterate(vs);
#endif
/* test code */
if (n==400)
{
ortp_message("attaching tee filter\n");
ms_ticker_detach (vs->ticker, vs->source);
vs->tee = ms_filter_new(MS_TEE_ID);
ms_filter_unlink(vs->pixconv,0, vs->output,0);
ms_filter_link(vs->pixconv,0,vs->tee,0);
ms_filter_link(vs->tee,0,vs->output,0);
ms_filter_link(vs->tee,1,vs->output,1);
//ms_filter_unlink(vs->tee,0,vs->output,0);
ms_ticker_attach (vs->ticker, vs->source);
}
if (n==800)
{
int corner=0;
ortp_message("setting corner to 0\n");
ms_filter_call_method(vs->output,MS_VIDEO_OUT_SET_CORNER,&corner);
}
if (n==1200)
{
ortp_message("setting corner to 1\n");
int corner=1;
ms_filter_call_method(vs->output,MS_VIDEO_OUT_SET_CORNER,&corner);
}
if (n==1600)
{
int corner=2;
ortp_message("setting corner to 2\n");
ms_filter_call_method(vs->output,MS_VIDEO_OUT_SET_CORNER,&corner);
}
if (n==2000)
{
int corner=3;
ortp_message("setting corner to 3\n");
ms_filter_call_method(vs->output,MS_VIDEO_OUT_SET_CORNER,&corner);
}
if (n==2400)
{
int corner=-1;
ortp_message("setting corner to -1\n");
ms_filter_call_method(vs->output,MS_VIDEO_OUT_SET_CORNER,&corner);
}
if (n==2800)
{
ortp_message("detaching tee filter\n");
ms_ticker_detach (vs->ticker, vs->source);
ms_filter_unlink(vs->pixconv,0,vs->tee,0);
ms_filter_unlink(vs->tee,0,vs->output,0);
ms_filter_unlink(vs->tee,1,vs->output,1);
ms_filter_destroy(vs->tee);
vs->tee=NULL;
ms_filter_link(vs->pixconv,0, vs->output,0);
ms_ticker_attach (vs->ticker, vs->source);
}
}
video_preview_stop(vs);
}
return 0;
}
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