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v4l2object: Split out saving format from set_format()

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=720568
This commit is contained in:
Nicolas Dufresne 2013-12-10 14:34:17 -05:00
parent 582f913667
commit 41c37a2c6c
1 changed files with 63 additions and 40 deletions
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103
sys/v4l2/gstv4l2object.c
View file

@ -2494,6 +2494,68 @@ no_supported_capture_method:
}
}
static void
gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
GstVideoInfo * info)
{
const GstVideoFormatInfo *finfo = info->finfo;
gint i;
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
/* figure out the frame layout */
v4l2object->n_v4l2_planes = MAX (1, format->fmt.pix_mp.num_planes);
v4l2object->sizeimage = 0;
for (i = 0; i < format->fmt.pix_mp.num_planes; i++) {
v4l2object->bytesperline[i] =
format->fmt.pix_mp.plane_fmt[i].bytesperline;
v4l2object->sizeimage += format->fmt.pix_mp.plane_fmt[i].sizeimage;
}
} else {
/* only one plane in non-MPLANE mode */
v4l2object->n_v4l2_planes = 1;
/* figure out the frame layout */
for (i = 0; i < finfo->n_planes; i++) {
guint stride = format->fmt.pix.bytesperline;
switch (finfo->format) {
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
case GST_VIDEO_FORMAT_NV16:
case GST_VIDEO_FORMAT_NV24:
v4l2object->bytesperline[i] = (i == 0 ? 1 : 2) *
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, stride);
break;
default:
v4l2object->bytesperline[i] =
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, stride);
break;
}
GST_DEBUG_OBJECT (v4l2object->element,
"Extrapolated stride for plane %d from %d to %d", i, stride,
v4l2object->bytesperline[i]);
}
v4l2object->sizeimage = format->fmt.pix.sizeimage;
}
GST_DEBUG_OBJECT (v4l2object->element, "Got sizeimage %u",
v4l2object->sizeimage);
v4l2object->info = *info;
v4l2object->fmtdesc = fmtdesc;
/* if we have a framerate pre-calculate duration */
if (info->fps_n > 0 && info->fps_d > 0) {
v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, info->fps_d,
info->fps_n);
} else {
v4l2object->duration = GST_CLOCK_TIME_NONE;
}
}
gboolean
gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
{
@ -2676,40 +2738,8 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
if (format.fmt.pix.pixelformat != pixelformat)
goto invalid_pixelformat;
}
/* only one plane in non-MPLANE mode */
v4l2object->n_v4l2_planes = 1;
/* figure out the frame layout */
for (i = 0; i < info.finfo->n_planes; i++) {
const GstVideoFormatInfo *finfo = info.finfo;
guint stride = format.fmt.pix.bytesperline;
switch (info.finfo->format) {
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
case GST_VIDEO_FORMAT_NV16:
case GST_VIDEO_FORMAT_NV24:
v4l2object->bytesperline[i] = (i == 0 ? 1 : 2) *
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, stride);
break;
default:
v4l2object->bytesperline[i] =
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, stride);
break;
}
GST_DEBUG_OBJECT (v4l2object->element,
"Extrapolated stride for plane %d from %d to %d", i, stride,
v4l2object->bytesperline[i]);
}
v4l2object->sizeimage = format.fmt.pix.sizeimage;
}
GST_DEBUG_OBJECT (v4l2object->element, "Got sizeimage %u",
v4l2object->sizeimage);
/* Is there a reason we require the caller to always specify a framerate? */
GST_DEBUG_OBJECT (v4l2object->element, "Desired framerate: %u/%u", fps_n,
fps_d);
@ -2765,14 +2795,7 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
}
done:
/* if we have a framerate pre-calculate duration */
if (fps_n > 0 && fps_d > 0) {
v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n);
} else {
v4l2object->duration = GST_CLOCK_TIME_NONE;
}
v4l2object->info = info;
v4l2object->fmtdesc = fmtdesc;
gst_v4l2_object_save_format (v4l2object, fmtdesc, &format, &info);
/* now configure ther pools */
if (!gst_v4l2_object_setup_pool (v4l2object, caps))