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video-converter: don't do gamma on alpha channel

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The alpha channel is not supposed to be gamma encoded.
This commit is contained in:
Wim Taymans 2015-02-24 09:54:18 +01:00
parent 561ddabd97
commit bf916a244d
1 changed files with 18 additions and 6 deletions
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24
gst-libs/gst/video/video-converter.c
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@ -1089,8 +1089,12 @@ gamma_convert_u8_u16 (GammaData * data, gpointer dest, gpointer src)
guint16 *table = data->gamma_table;
gint width = data->width * 4;
for (i = 0; i < width; i++)
d[i] = table[s[i]];
for (i = 0; i < width; i += 4) {
d[i + 0] = (s[i] << 8) | s[i];
d[i + 1] = table[s[i + 1]];
d[i + 2] = table[s[i + 2]];
d[i + 3] = table[s[i + 3]];
}
}
static void
@ -1102,8 +1106,12 @@ gamma_convert_u16_u8 (GammaData * data, gpointer dest, gpointer src)
guint8 *table = data->gamma_table;
gint width = data->width * 4;
for (i = 0; i < width; i++)
d[i] = table[s[i]];
for (i = 0; i < width; i += 4) {
d[i + 0] = s[i] >> 8;
d[i + 1] = table[s[i + 1]];
d[i + 2] = table[s[i + 2]];
d[i + 3] = table[s[i + 3]];
}
}
static void
@ -1115,8 +1123,12 @@ gamma_convert_u16_u16 (GammaData * data, gpointer dest, gpointer src)
guint16 *table = data->gamma_table;
gint width = data->width * 4;
for (i = 0; i < width; i++)
d[i] = table[s[i]];
for (i = 0; i < width; i += 4) {
d[i + 0] = s[i];
d[i + 1] = table[s[i + 1]];
d[i + 2] = table[s[i + 2]];
d[i + 3] = table[s[i + 3]];
}
}
static void