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v4l2: rework size detection 

This fixes my TV card, and should be backported after testing
This commit is contained in:
Pierre Ynard 2009-10-16 19:21:51 +02:00
parent b4433daad4
commit 881aa894c5
1 changed files with 21 additions and 19 deletions
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40
modules/access/v4l2.c
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@ -2003,7 +2003,7 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
memset( &fmt, 0, sizeof(fmt) );
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if( p_sys->i_width == 0 || p_sys->i_height == 0 )
if( p_sys->i_width <= 0 || p_sys->i_height <= 0 )
{
/* Use current width and height settings */
if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
@ -2012,26 +2012,22 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
goto open_failed;
}
p_sys->i_width = fmt.fmt.pix.width;
p_sys->i_height = fmt.fmt.pix.height;
msg_Dbg( p_obj, "found default width and height of %ux%u",
fmt.fmt.pix.width, fmt.fmt.pix.height );
if( fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE )
if( p_sys->i_width < 0 || p_sys->i_height < 0 )
{
p_sys->i_height = p_sys->i_height * 2;
msg_Dbg( p_obj, "will try to find optimal width and height." );
}
}
else if( p_sys->i_width < 0 || p_sys->i_height < 0 )
{
msg_Dbg( p_obj, "will try to find optimal width and height." );
}
else
{
/* Use user specified width and height */
msg_Dbg( p_obj, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
fmt.fmt.pix.width = p_sys->i_width;
fmt.fmt.pix.height = p_sys->i_height;
}
fmt.fmt.pix.width = __MAX(0, p_sys->i_width);
fmt.fmt.pix.height = __MAX(0, p_sys->i_height);
fmt.fmt.pix.field = V4L2_FIELD_NONE;
if (b_demux)
@ -2114,23 +2110,28 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
&i_width, &i_height );
if( i_width || i_height )
{
msg_Dbg( p_demux, "Found optimal dimensions for framerate %f of %dx%d",
p_sys->f_fps, i_width, i_height );
msg_Dbg( p_demux, "Found optimal dimensions for framerate %f "
"of %ux%u", p_sys->f_fps, i_width, i_height );
fmt.fmt.pix.width = i_width;
fmt.fmt.pix.height = i_height;
if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) {;}
if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
{
msg_Err( p_obj, "Cannot set size to optimal dimensions "
"%ux%u", i_width, i_height );
goto open_failed;
}
}
else
{
msg_Warn( p_obj, "Could not find optimal width and height." );
msg_Warn( p_obj, "Could not find optimal width and height, "
"falling back to driver default." );
}
}
/* Reassign width, height and chroma incase driver override */
p_sys->i_width = fmt.fmt.pix.width;
p_sys->i_height = fmt.fmt.pix.height;
}
p_sys->i_width = fmt.fmt.pix.width;
p_sys->i_height = fmt.fmt.pix.height;
if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
/* Print extra info */
msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
@ -2161,6 +2162,7 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
break;
case V4L2_FIELD_ALTERNATE:
msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
p_sys->i_height = p_sys->i_height * 2;
break;
case V4L2_FIELD_INTERLACED_TB:
msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );