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video-scaler: fix taps in interlaced mode

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This commit is contained in:
Wim Taymans 2014-11-04 11:02:49 +01:00
parent 562416bb94
commit 67a4702b19
1 changed files with 10 additions and 2 deletions
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12
gst-libs/gst/video/video-scaler.c
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@ -283,7 +283,7 @@ resampler_convert_coeff (const gdouble * src,
static void static void
make_s16_taps (GstVideoScaler * scale, gint precision) make_s16_taps (GstVideoScaler * scale, gint precision)
{ {
gint i, j, max_taps, n_phases, out_size; gint i, j, max_taps, n_phases, out_size, src_inc;
gint16 *taps_s16, *taps_s16_4; gint16 *taps_s16, *taps_s16_4;
gdouble *taps; gdouble *taps;
guint32 *phase, *offset, *offset_n; guint32 *phase, *offset, *offset_n;
@ -291,6 +291,13 @@ make_s16_taps (GstVideoScaler * scale, gint precision)
n_phases = scale->resampler.n_phases; n_phases = scale->resampler.n_phases;
max_taps = scale->resampler.max_taps; max_taps = scale->resampler.max_taps;
if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
src_inc = 2;
else
src_inc = 1;
max_taps /= src_inc;
taps = scale->resampler.taps; taps = scale->resampler.taps;
taps_s16 = scale->taps_s16 = g_malloc (sizeof (gint16) * n_phases * max_taps); taps_s16 = scale->taps_s16 = g_malloc (sizeof (gint16) * n_phases * max_taps);
@ -312,11 +319,12 @@ make_s16_taps (GstVideoScaler * scale, gint precision)
offset_n = scale->offset_n = offset_n = scale->offset_n =
g_malloc (sizeof (guint32) * out_size * max_taps); g_malloc (sizeof (guint32) * out_size * max_taps);
for (j = 0; j < max_taps; j++) { for (j = 0; j < max_taps; j++) {
for (i = 0; i < out_size; i++) { for (i = 0; i < out_size; i++) {
gint16 tap; gint16 tap;
offset_n[j * out_size + i] = offset[i] + j; offset_n[j * out_size + i] = offset[i] + j * src_inc;
tap = taps_s16[phase[i] * max_taps + j]; tap = taps_s16[phase[i] * max_taps + j];
taps_s16_4[(j * out_size + i) * 4 + 0] = tap; taps_s16_4[(j * out_size + i) * 4 + 0] = tap;
taps_s16_4[(j * out_size + i) * 4 + 1] = tap; taps_s16_4[(j * out_size + i) * 4 + 1] = tap;