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dvdsubdec: make up clut values if they weren't set

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This commit is contained in:
David Schleef 2011-02-16 21:17:57 -08:00
parent 455aaa3fbd
commit 0a786810af
1 changed files with 26 additions and 8 deletions
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34
gst/dvdspu/gstspu-vobsub-render.c
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@ -37,15 +37,33 @@ gstspu_vobsub_recalc_palette (GstDVDSpu * dvdspu,
SpuState *state = &dvdspu->spu_state; SpuState *state = &dvdspu->spu_state;
gint i; gint i;
for (i = 0; i < 4; i++, dest++) { if (state->vobsub.current_clut[idx[0]] != 0) {
guint32 col = state->vobsub.current_clut[idx[i]]; for (i = 0; i < 4; i++, dest++) {
guint32 col = state->vobsub.current_clut[idx[i]];
/* Convert incoming 4-bit alpha to 8 bit for blending */ /* Convert incoming 4-bit alpha to 8 bit for blending */
dest->A = (alpha[i] << 4) | alpha[i]; dest->A = (alpha[i] << 4) | alpha[i];
dest->Y = ((guint16) ((col >> 16) & 0xff)) * dest->A; dest->Y = ((guint16) ((col >> 16) & 0xff)) * dest->A;
/* U/V are stored as V/U in the clut words, so switch them */ /* U/V are stored as V/U in the clut words, so switch them */
dest->V = ((guint16) ((col >> 8) & 0xff)) * dest->A; dest->V = ((guint16) ((col >> 8) & 0xff)) * dest->A;
dest->U = ((guint16) (col & 0xff)) * dest->A; dest->U = ((guint16) (col & 0xff)) * dest->A;
}
} else {
int y = 240;
/* The CLUT presumably hasn't been set, so we'll just guess some
* values for the non-transparent colors (white, grey, black) */
for (i = 0; i < 4; i++, dest++) {
dest->A = (alpha[i] << 4) | alpha[i];
if (alpha[i] != 0) {
dest[0].Y = y * dest[0].A;
y -= 112;
if (y < 0)
y = 0;
}
dest[0].U = 128 * dest[0].A;
dest[0].V = 128 * dest[0].A;
}
} }
} }