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videolevels: skip LUT calculation if in passthrough mode

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This commit is contained in:
Joshua M. Doe 2017-09-25 15:02:16 -04:00
parent 741f91f488
commit 034971d860
1 changed files with 21 additions and 17 deletions
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38
gst/videoadjust/gstvideolevels.c
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@ -602,27 +602,29 @@ gst_videolevels_calculate_lut_uint16_to_uint8 (GstVideoLevels * videolevels,
gst_videolevels_check_passthrough (videolevels); gst_videolevels_check_passthrough (videolevels);
low_in = videolevels->lower_input; if (!videolevels->passthrough) {
high_in = videolevels->upper_input; low_in = videolevels->lower_input;
high_in = videolevels->upper_input;
GST_LOG_OBJECT (videolevels, "Make linear LUT mapping (%d, %d) -> (%d, %d)", GST_LOG_OBJECT (videolevels, "Make linear LUT mapping (%d, %d) -> (%d, %d)",
low_in, high_in, low_out, high_out); low_in, high_in, low_out, high_out);
if (low_in == high_in) if (low_in == high_in)
m = 0.0; m = 0.0;
else else
m = (high_out - low_out) / (gdouble) (high_in - low_in); m = (high_out - low_out) / (gdouble) (high_in - low_in);
b = low_out - m * low_in; b = low_out - m * low_in;
if (endianness == G_LITTLE_ENDIAN) if (endianness == G_LITTLE_ENDIAN)
for (i = 0; i < G_MAXUINT16; i++) for (i = 0; i < G_MAXUINT16; i++)
lut[i] = GUINT8_CLAMP (m * GUINT16_FROM_LE (i) + b, low_out, high_out); lut[i] = GUINT8_CLAMP (m * GUINT16_FROM_LE (i) + b, low_out, high_out);
else if (endianness == G_BIG_ENDIAN) else if (endianness == G_BIG_ENDIAN)
for (i = 0; i < G_MAXUINT16; i++) for (i = 0; i < G_MAXUINT16; i++)
lut[i] = GUINT8_CLAMP (m * GUINT16_FROM_BE (i) + b, low_out, high_out); lut[i] = GUINT8_CLAMP (m * GUINT16_FROM_BE (i) + b, low_out, high_out);
else else
g_assert_not_reached (); g_assert_not_reached ();
}
} }
/** /**
@ -802,6 +804,8 @@ gst_videolevels_check_passthrough (GstVideoLevels * levels)
passthrough = FALSE; passthrough = FALSE;
} }
if (passthrough != levels->passthrough) { if (passthrough != levels->passthrough) {
GST_DEBUG_OBJECT (levels, "Passthrough mode: %s",
passthrough ? "ENABLED" : "DISABLED");
levels->passthrough = passthrough; levels->passthrough = passthrough;
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (levels), gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (levels),
levels->passthrough); levels->passthrough);