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gstvalue: add internal _list_concat() that takes ownership of input values

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Avoids unnecessary copies.
This commit is contained in:
Tim-Philipp Müller 2014-06-19 08:03:37 +01:00
parent 5f6088f039
commit adcbe94aff
1 changed files with 58 additions and 17 deletions
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75
gst/gstvalue.c
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@ -121,8 +121,9 @@ struct _GstValueSubtractInfo
#define FUNDAMENTAL_TYPE_ID(type) \
((type) >> G_TYPE_FUNDAMENTAL_SHIFT)
#define VALUE_LIST_SIZE(v) (((GArray *) (v)->data[0].v_pointer)->len)
#define VALUE_LIST_GET_VALUE(v, index) ((const GValue *) &g_array_index ((GArray *) (v)->data[0].v_pointer, GValue, (index)))
#define VALUE_LIST_ARRAY(v) ((GArray *) (v)->data[0].v_pointer)
#define VALUE_LIST_SIZE(v) (VALUE_LIST_ARRAY(v)->len)
#define VALUE_LIST_GET_VALUE(v, index) ((const GValue *) &g_array_index (VALUE_LIST_ARRAY(v), GValue, (index)))
static GArray *gst_value_table;
static GHashTable *gst_value_hash;
@ -531,6 +532,56 @@ gst_value_list_concat (GValue * dest, const GValue * value1,
}
}
/* same as gst_value_list_concat() but takes ownership of GValues */
static void
gst_value_list_concat_and_take_values (GValue * dest, GValue * val1,
GValue * val2)
{
guint i, val1_length, val2_length;
gboolean val1_is_list;
gboolean val2_is_list;
GArray *array;
g_assert (dest != NULL);
g_assert (G_VALUE_TYPE (dest) == 0);
g_assert (G_IS_VALUE (val1));
g_assert (G_IS_VALUE (val2));
g_assert (gst_value_list_or_array_are_compatible (val1, val2));
val1_is_list = GST_VALUE_HOLDS_LIST (val1);
val1_length = (val1_is_list ? VALUE_LIST_SIZE (val1) : 1);
val2_is_list = GST_VALUE_HOLDS_LIST (val2);
val2_length = (val2_is_list ? VALUE_LIST_SIZE (val2) : 1);
g_value_init (dest, GST_TYPE_LIST);
array = (GArray *) dest->data[0].v_pointer;
g_array_set_size (array, val1_length + val2_length);
if (val1_is_list) {
for (i = 0; i < val1_length; i++) {
g_array_index (array, GValue, i) = *VALUE_LIST_GET_VALUE (val1, i);
}
g_array_set_size (VALUE_LIST_ARRAY (val1), 0);
g_value_unset (val1);
} else {
g_array_index (array, GValue, 0) = *val1;
G_VALUE_TYPE (val1) = G_TYPE_INVALID;
}
if (val2_is_list) {
for (i = 0; i < val2_length; i++) {
const GValue *v2 = VALUE_LIST_GET_VALUE (val2, i);
g_array_index (array, GValue, i + val1_length) = *v2;
}
g_array_set_size (VALUE_LIST_ARRAY (val2), 0);
g_value_unset (val2);
} else {
g_array_index (array, GValue, val1_length) = *val2;
G_VALUE_TYPE (val2) = G_TYPE_INVALID;
}
}
/**
* gst_value_list_merge:
* @dest: (out caller-allocates): an uninitialized #GValue to take the result
@ -3853,9 +3904,7 @@ gst_value_create_new_range (GValue * dest, gint min1, gint max1, gint min2,
}
if (min1 <= max1 && min2 <= max2) {
gst_value_list_concat (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (pv2);
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
@ -4002,9 +4051,7 @@ gst_value_create_new_int64_range (GValue * dest, gint64 min1, gint64 max1,
}
if (min1 <= max1 && min2 <= max2) {
gst_value_list_concat (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (pv2);
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
@ -4150,9 +4197,7 @@ gst_value_subtract_double_range_double_range (GValue * dest,
}
if (min1 < max1 && min2 < max2) {
gst_value_list_concat (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (pv2);
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
@ -4192,9 +4237,7 @@ gst_value_subtract_from_list (GValue * dest, const GValue * minuend,
GValue temp;
gst_value_move (&temp, dest);
gst_value_list_concat (dest, &temp, &subtraction);
g_value_unset (&temp);
g_value_unset (&subtraction);
gst_value_list_concat_and_take_values (dest, &temp, &subtraction);
}
}
}
@ -4328,9 +4371,7 @@ gst_value_subtract_fraction_range_fraction_range (GValue * dest,
}
if (cmp1 == GST_VALUE_LESS_THAN && cmp2 == GST_VALUE_LESS_THAN) {
gst_value_list_concat (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (pv2);
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}