/* calculate how much loss a conversion would be */
static void score_value(GstBaseTransform * base, const GstVideoFormatInfo * in_info, const GValue * val, gint * min_loss, const GstVideoFormatInfo ** out_info)
{
const gchar *fname;
const GstVideoFormatInfo *t_info;
GstVideoFormatFlags in_flags, t_flags;
gint loss;
fname = g_value_get_string(val);
t_info = gst_video_format_get_info(gst_video_format_from_string(fname));
if (!t_info)
return;
/* accept input format immediately without loss */
if (in_info == t_info)
{
*min_loss = 0;
*out_info = t_info;
return;
}
loss = 1;
in_flags = GST_VIDEO_FORMAT_INFO_FLAGS(in_info);
in_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;
in_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;
in_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;
t_flags = GST_VIDEO_FORMAT_INFO_FLAGS(t_info);
t_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;
t_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;
t_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;
if ((t_flags & PALETTE_MASK) != (in_flags & PALETTE_MASK))
loss += SCORE_PALETTE_LOSS;
if ((t_flags & COLOR_MASK) != (in_flags & COLOR_MASK))
loss += SCORE_COLOR_LOSS;
if ((t_flags & ALPHA_MASK) != (in_flags & ALPHA_MASK))
loss += SCORE_ALPHA_LOSS;
if ((in_info->h_sub[1]) < (t_info->h_sub[1]))
loss += SCORE_CHROMA_H_LOSS;
if ((in_info->w_sub[1]) < (t_info->w_sub[1]))
loss += SCORE_CHROMA_W_LOSS;
if ((in_info->bits) > (t_info->bits))
loss += SCORE_DEPTH_LOSS;
GST_DEBUG_OBJECT(base, "score %s -> %s = %d",
GST_VIDEO_FORMAT_INFO_NAME(in_info),
GST_VIDEO_FORMAT_INFO_NAME(t_info), loss);
if (loss < *min_loss)
{
GST_DEBUG_OBJECT(base, "found new best %d", loss);
*out_info = t_info;
*min_loss = loss;
}
}
void
gst_video_info_change_format (GstVideoInfo * vip, GstVideoFormat format,
guint width, guint height)
{
GstVideoInfo vi = *vip;
gst_video_info_set_format (vip, format, width, height);
GST_VIDEO_INFO_INTERLACE_MODE (vip) = GST_VIDEO_INFO_INTERLACE_MODE (&vi);
GST_VIDEO_FORMAT_INFO_FLAGS (vip) = GST_VIDEO_FORMAT_INFO_FLAGS (&vi);
GST_VIDEO_INFO_VIEWS (vip) = GST_VIDEO_INFO_VIEWS (&vi);
GST_VIDEO_INFO_PAR_N (vip) = GST_VIDEO_INFO_PAR_N (&vi);
GST_VIDEO_INFO_PAR_D (vip) = GST_VIDEO_INFO_PAR_D (&vi);
GST_VIDEO_INFO_FPS_N (vip) = GST_VIDEO_INFO_FPS_N (&vi);
GST_VIDEO_INFO_FPS_D (vip) = GST_VIDEO_INFO_FPS_D (&vi);
GST_VIDEO_INFO_MULTIVIEW_MODE (vip) = GST_VIDEO_INFO_MULTIVIEW_MODE (&vi);
GST_VIDEO_INFO_MULTIVIEW_FLAGS (vip) = GST_VIDEO_INFO_MULTIVIEW_FLAGS (&vi);
}
