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playsink: pass translated color balance value to channel

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We found a case where untranslated values were being passed from the
proxy to the underlying channel, causing bad color balance values
in some setups.

Thanks to Sebastian Dröge for clarifying how the code works, and
suggesting the fix.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=701202
This commit is contained in:
Daniel Drake 2013-05-29 10:33:48 -06:00 committed by Sebastian Dröge
parent 96aab6d8a5
commit d32d2f0b14
1 changed files with 12 additions and 1 deletions
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13
gst/playback/gstplaysink.c
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@ -1543,6 +1543,7 @@ update_colorbalance (GstPlaySink * playsink)
GstColorBalanceChannel *proxy = l->data;
GstColorBalanceChannel *channel = NULL;
const GList *channels, *k;
gdouble new_val;
channels = gst_color_balance_list_channels (balance);
for (k = channels; k; k = k->next) {
@ -1556,8 +1557,18 @@ update_colorbalance (GstPlaySink * playsink)
g_assert (channel);
/* Convert to [0, 1] range */
new_val =
((gdouble) playsink->colorbalance_values[i] -
(gdouble) proxy->min_value) / ((gdouble) proxy->max_value -
(gdouble) proxy->min_value);
/* Convert to channel range */
new_val =
channel->min_value + new_val * ((gdouble) channel->max_value -
(gdouble) channel->min_value);
gst_color_balance_set_value (balance, channel,
playsink->colorbalance_values[i]);
(gint) (new_val + 0.5));
}
g_signal_handler_unblock (balance, playsink->colorbalance_value_changed_id);