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video-scaler: fix scaling of odd width for YUY2 formats

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We need to scale groups of 4 bytes for YUY2 formats so round up to 4.
It's possible that there is no Y byte for the last pixel so make sure
we clamp correctly.
This commit is contained in:
Wim Taymans 2015-06-17 16:43:03 +02:00
parent 70363766cd
commit f4a5277340
1 changed files with 21 additions and 23 deletions
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44
gst-libs/gst/video/video-scaler.c
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@ -1121,7 +1121,7 @@ gst_video_scaler_combine_packed_YUV (GstVideoScaler * y_scale,
resampler = &scale->resampler;
out_size = y_scale->resampler.out_size * 2;
out_size = GST_ROUND_UP_4 (y_scale->resampler.out_size * 2);
max_taps = y_scale->resampler.max_taps;
n_phases = out_size;
offset = g_malloc (sizeof (guint32) * out_size);
@ -1142,15 +1142,18 @@ gst_video_scaler_combine_packed_YUV (GstVideoScaler * y_scale,
scale->inc = y_scale->inc;
for (i = 0; i < out_size; i++) {
gint ic;
if ((i & 1) == scale->out_y_offset) {
offset[i] = y_scale->resampler.offset[i / 2] * 2 + scale->in_y_offset;
ic = CLAMP (i / 2, 0, y_scale->resampler.out_size - 1);
offset[i] = y_scale->resampler.offset[ic] * 2 + scale->in_y_offset;
memcpy (taps + i * max_taps, y_scale->resampler.taps +
y_scale->resampler.phase[i / 2] * max_taps,
max_taps * sizeof (gdouble));
y_scale->resampler.phase[ic] * max_taps, max_taps * sizeof (gdouble));
} else {
offset[i] = uv_scale->resampler.offset[i / 4] * 4 + (i & 3);
ic = CLAMP (i / 4, 0, uv_scale->resampler.out_size - 1);
offset[i] = uv_scale->resampler.offset[ic] * 4 + (i & 3);
memcpy (taps + i * max_taps, uv_scale->resampler.taps +
uv_scale->resampler.phase[i / 4] * max_taps,
uv_scale->resampler.phase[ic] * max_taps,
max_taps * sizeof (gdouble));
}
phase[i] = i;
@ -1165,23 +1168,23 @@ static gboolean
get_functions (GstVideoScaler * hscale, GstVideoScaler * vscale,
GstVideoFormat format,
GstVideoScalerHFunc * hfunc, GstVideoScalerVFunc * vfunc,
gint * n_elems, gint * width_mult)
gint * n_elems, guint * width)
{
gint bits;
*width_mult = 1;
gboolean mono = FALSE;
switch (format) {
case GST_VIDEO_FORMAT_GRAY8:
bits = 8;
*n_elems = 1;
mono = TRUE;
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_YVYU:
case GST_VIDEO_FORMAT_UYVY:
bits = 8;
*n_elems = 1;
*width_mult = 2;
*width = GST_ROUND_UP_4 (*width * 2);
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
@ -1210,6 +1213,7 @@ get_functions (GstVideoScaler * hscale, GstVideoScaler * vscale,
case GST_VIDEO_FORMAT_GRAY16_BE:
bits = 16;
*n_elems = 1;
mono = TRUE;
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV16:
@ -1237,7 +1241,7 @@ get_functions (GstVideoScaler * hscale, GstVideoScaler * vscale,
*hfunc = video_scale_h_near_u32;
break;
case 2:
if (*n_elems == 1 && *width_mult == 1)
if (*n_elems == 1 && mono)
*hfunc = video_scale_h_2tap_1u8;
else if (*n_elems == 4)
*hfunc = video_scale_h_2tap_4u8;
@ -1311,7 +1315,7 @@ void
gst_video_scaler_horizontal (GstVideoScaler * scale, GstVideoFormat format,
gpointer src, gpointer dest, guint dest_offset, guint width)
{
gint n_elems, mult;
gint n_elems;
GstVideoScalerHFunc func;
g_return_if_fail (scale != NULL);
@ -1319,11 +1323,9 @@ gst_video_scaler_horizontal (GstVideoScaler * scale, GstVideoFormat format,
g_return_if_fail (dest != NULL);
g_return_if_fail (dest_offset + width <= scale->resampler.out_size);
if (!get_functions (scale, NULL, format, &func, NULL, &n_elems, &mult))
if (!get_functions (scale, NULL, format, &func, NULL, &n_elems, &width))
goto no_func;
width *= mult;
if (scale->tmpwidth < width)
realloc_tmplines (scale, n_elems, width);
@ -1354,7 +1356,7 @@ void
gst_video_scaler_vertical (GstVideoScaler * scale, GstVideoFormat format,
gpointer src_lines[], gpointer dest, guint dest_offset, guint width)
{
gint n_elems, mult;
gint n_elems;
GstVideoScalerVFunc func;
g_return_if_fail (scale != NULL);
@ -1362,11 +1364,9 @@ gst_video_scaler_vertical (GstVideoScaler * scale, GstVideoFormat format,
g_return_if_fail (dest != NULL);
g_return_if_fail (dest_offset < scale->resampler.out_size);
if (!get_functions (NULL, scale, format, NULL, &func, &n_elems, &mult))
if (!get_functions (NULL, scale, format, NULL, &func, &n_elems, &width))
goto no_func;
width *= mult;
if (scale->tmpwidth < width)
realloc_tmplines (scale, n_elems, width);
@ -1409,7 +1409,7 @@ gst_video_scaler_2d (GstVideoScaler * hscale, GstVideoScaler * vscale,
gpointer dest, gint dest_stride, guint x, guint y,
guint width, guint height)
{
gint n_elems, mult;
gint n_elems;
GstVideoScalerHFunc hfunc;
GstVideoScalerVFunc vfunc;
gint i;
@ -1417,11 +1417,9 @@ gst_video_scaler_2d (GstVideoScaler * hscale, GstVideoScaler * vscale,
g_return_if_fail (src != NULL);
g_return_if_fail (dest != NULL);
if (!get_functions (hscale, vscale, format, &hfunc, &vfunc, &n_elems, &mult))
if (!get_functions (hscale, vscale, format, &hfunc, &vfunc, &n_elems, &width))
goto no_func;
width *= mult;
#define LINE(s,ss,i) ((guint8 *)(s) + ((i) * (ss)))
#define TMP_LINE(s,i,v) ((guint8 *)(s->tmpline1) + (((i) % (v)) * (sizeof (gint32) * width * n_elems)))