vf_colorspace: Added linear trc.

This patch adds the coefficients for the linear gamma function (1,0,1,0)
to the colorspace filter.

Signed-off-by: Andrew Klaassen <clawsoon@yahoo.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

diff --git a/libavfilter/vf_colorspace.c b/libavfilter/vf_colorspace.c
index 34f13d9d3cf9115ff8f2acc72944922f5ece928e..39af74c221af7d4e6961a0541959cc0a6dd7f5ff 100644 (file)
--- a/libavfilter/vf_colorspace.c
+++ b/libavfilter/vf_colorspace.c
@@ -179,6 +179,7 @@ static const struct TransferCharacteristics transfer_characteristics[AVCOL_TRC_N
     [AVCOL_TRC_GAMMA28]   = { 1.0,    0.0,    1.0 / 2.8, 0.0 },
     [AVCOL_TRC_SMPTE170M] = { 1.099,  0.018,  0.45, 4.5 },
     [AVCOL_TRC_SMPTE240M] = { 1.1115, 0.0228, 0.45, 4.0 },
+    [AVCOL_TRC_LINEAR]    = { 1.0,    0.0,    1.0,  0.0 },
     [AVCOL_TRC_IEC61966_2_1] = { 1.055, 0.0031308, 1.0 / 2.4, 12.92 },
     [AVCOL_TRC_IEC61966_2_4] = { 1.099, 0.018, 0.45, 4.5 },
     [AVCOL_TRC_BT2020_10] = { 1.099,  0.018,  0.45, 4.5 },
@@ -990,6 +991,7 @@ static const AVOption colorspace_options[] = {
     ENUM("gamma28",      AVCOL_TRC_GAMMA28,      "trc"),
     ENUM("smpte170m",    AVCOL_TRC_SMPTE170M,    "trc"),
     ENUM("smpte240m",    AVCOL_TRC_SMPTE240M,    "trc"),
+    ENUM("linear",       AVCOL_TRC_LINEAR,       "trc"),
     ENUM("srgb",         AVCOL_TRC_IEC61966_2_1, "trc"),
     ENUM("iec61966-2-1", AVCOL_TRC_IEC61966_2_1, "trc"),
     ENUM("xvycc",        AVCOL_TRC_IEC61966_2_4, "trc"),