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v4l2bufferpool: set buffer interlace flags when field is V4L2_FIELD_INTERLACED

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If v4l2_buffer.field is V4L2_FIELD_INTERLACED, we set corresponding
GstVideoBuffer flags depending on the video standard.
According to V4L2 specification, M/NTSC transmits the bottom field
first, all other standards the top field first.

https://bugzilla.gnome.org/show_bug.cgi?id=737603
This commit is contained in:
Aurélien Zanelli 2014-12-09 14:01:50 +01:00 committed by Nicolas Dufresne
parent fef1a8d88a
commit 62193129c5
1 changed files with 10 additions and 0 deletions
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10
sys/v4l2/gstv4l2bufferpool.c
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@ -1130,6 +1130,16 @@ gst_v4l2_buffer_pool_dqbuf (GstV4l2BufferPool * pool, GstBuffer ** buffer)
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_INTERLACED);
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
break;
case V4L2_FIELD_INTERLACED:
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_INTERLACED);
if (obj->tv_norm == V4L2_STD_NTSC_M ||
obj->tv_norm == V4L2_STD_NTSC_M_JP ||
obj->tv_norm == V4L2_STD_NTSC_M_KR) {
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
} else {
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
}
break;
default:
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_INTERLACED);
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);