static gboolean
check_fourcc_list (const GValue * format_value)
{
const GValue *fourcc_value;
gboolean got_yv12 = FALSE;
gboolean got_i420 = FALSE;
gboolean got_yuy2 = FALSE;
guint32 fourcc;
fourcc_value = gst_value_list_get_value (format_value, 0);
fail_unless (fourcc_value != NULL);
fail_unless (GST_VALUE_HOLDS_FOURCC (fourcc_value));
fourcc = gst_value_get_fourcc (fourcc_value);
fail_unless (fourcc != 0);
got_i420 = got_i420 || (fourcc == GST_STR_FOURCC ("I420"));
got_yuy2 = got_yuy2 || (fourcc == GST_STR_FOURCC ("YUY2"));
got_yv12 = got_yv12 || (fourcc == GST_STR_FOURCC ("YV12"));
fourcc_value = gst_value_list_get_value (format_value, 1);
fail_unless (fourcc_value != NULL);
fail_unless (GST_VALUE_HOLDS_FOURCC (fourcc_value));
fourcc = gst_value_get_fourcc (fourcc_value);
fail_unless (fourcc != 0);
got_i420 = got_i420 || (fourcc == GST_STR_FOURCC ("I420"));
got_yuy2 = got_yuy2 || (fourcc == GST_STR_FOURCC ("YUY2"));
got_yv12 = got_yv12 || (fourcc == GST_STR_FOURCC ("YV12"));
fourcc_value = gst_value_list_get_value (format_value, 2);
fail_unless (fourcc_value != NULL);
fail_unless (GST_VALUE_HOLDS_FOURCC (fourcc_value));
fourcc = gst_value_get_fourcc (fourcc_value);
fail_unless (fourcc != 0);
got_i420 = got_i420 || (fourcc == GST_STR_FOURCC ("I420"));
got_yuy2 = got_yuy2 || (fourcc == GST_STR_FOURCC ("YUY2"));
got_yv12 = got_yv12 || (fourcc == GST_STR_FOURCC ("YV12"));
return (got_i420 && got_yuy2 && got_yv12);
}
/* this function is a bit of a last resort */
static void
gst_v4lsrc_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
int i;
int targetwidth, targetheight;
GstV4lSrc *v4lsrc = GST_V4LSRC (bsrc);
struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
struct video_window *vwin = &GST_V4LELEMENT (v4lsrc)->vwin;
if (GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lsrc))) {
GST_DEBUG_OBJECT (v4lsrc, "device reported w: %d-%d, h: %d-%d",
vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight);
targetwidth = vcap->minwidth;
targetheight = vcap->minheight;
/* if we can get the current vwin settings, we use those to fixate */
if (!gst_v4l_get_capabilities (GST_V4LELEMENT (v4lsrc)))
GST_DEBUG_OBJECT (v4lsrc, "failed getting capabilities");
else {
targetwidth = vwin->width;
targetheight = vwin->height;
}
} else {
GST_DEBUG_OBJECT (v4lsrc, "device closed, guessing");
targetwidth = 320;
targetheight = 200;
}
GST_DEBUG_OBJECT (v4lsrc, "targetting %dx%d", targetwidth, targetheight);
for (i = 0; i < gst_caps_get_size (caps); ++i) {
const GValue *v;
structure = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_int (structure, "width", targetwidth);
gst_structure_fixate_field_nearest_int (structure, "height", targetheight);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 15, 2);
v = gst_structure_get_value (structure, "format");
if (v && G_VALUE_TYPE (v) != GST_TYPE_FOURCC) {
guint32 fourcc;
g_return_if_fail (G_VALUE_TYPE (v) == GST_TYPE_LIST);
fourcc = gst_value_get_fourcc (gst_value_list_get_value (v, 0));
gst_structure_set (structure, "format", GST_TYPE_FOURCC, fourcc, NULL);
}
}
}
/* this function is a bit of a last resort */
static void
gst_v4l2src_fixate (GstBaseSrc * basesrc, GstCaps * caps)
{
GstStructure *structure;
gint i;
GST_DEBUG_OBJECT (basesrc, "fixating caps %" GST_PTR_FORMAT, caps);
for (i = 0; i < gst_caps_get_size (caps); ++i) {
const GValue *v;
structure = gst_caps_get_structure (caps, i);
/* FIXME such sizes? we usually fixate to something in the 320x200
* range... */
/* We are fixating to greater possble size (limited to GST_V4L2_MAX_SIZE)
and the maximum framerate resolution for that size */
gst_structure_fixate_field_nearest_int (structure, "width",
GST_V4L2_MAX_SIZE);
gst_structure_fixate_field_nearest_int (structure, "height",
GST_V4L2_MAX_SIZE);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
G_MAXINT, 1);
v = gst_structure_get_value (structure, "format");
if (v && G_VALUE_TYPE (v) != GST_TYPE_FOURCC) {
guint32 fourcc;
g_return_if_fail (G_VALUE_TYPE (v) == GST_TYPE_LIST);
fourcc = gst_value_get_fourcc (gst_value_list_get_value (v, 0));
gst_structure_set (structure, "format", GST_TYPE_FOURCC, fourcc, NULL);
}
}
GST_DEBUG_OBJECT (basesrc, "fixated caps %" GST_PTR_FORMAT, caps);
}
static VALUE
fourcc_to_i(VALUE self)
{
return UINT2NUM(gst_value_get_fourcc(DATA_PTR(self)));
}
static void
fourcc_rvalue2gvalue(VALUE value, GValue *result)
{
gst_value_set_fourcc(result,
gst_value_get_fourcc(RVAL2GOBJ(value)));
}
