Masktools2 2.2.20

v2.2.20 (20200303)

• new "yscalef" and "yscaleb" keywords similar to "scalef" and "scaleb" but scaling is forced to use rules for Y (non-UV) planes
• mt_lutspa: add parameters "scale_inputs", "clamp_float" and "clamp_float_UV"
• new predefined constants in expressions: yrange_min, yrange_half, yrange_max
  Unlike range_min, range_half, range_max the y-prefixed versions do not depend on whether the currently
  processed plane is luma(Y) or chroma(U/V). They are always returning the values of Y plane.
• new parameter to lut functions: Boolean "clamp_float_UV": default false, as an addition to clamp_float (since v2.2.20).
• New: Parameter "scale_inputs" can now be set to "floatUV" (chroma pre-shift by 0.5 for 32 bit float pixels)
• Fix: mt_motion mask contained out-of range pixels for 10-14 bit inputs
• Fix: mt_edge convolution mode incorrect result on 10-32 bits when normalizer weight is not power of 2
  e.g. mode = "1 2 1 0 0 0 -1 -2 -1 15.0" (normalizer: 10th parameter or maximum of (sum_positive/sum_negative))
  Note: when processing chroma (u=3,v=3) on 32 bit float clip will result 0..1.0 ranged masks in chroma planes as well.
• Source:
  • add LLVM-clangCl to VC project configuration (built-in clang support in VS2019)
  • fix LLVM build for VS2019
  • silence many warnings
  • project configurations: use current SDK version 10.0.18362.0

v2.2.19 (20190710 - not released)

• Fix: mt_infix to recognize scaleb and scalef
• Fix: mt_infix to recognize ymin, ymax, abs, atan, etc... tokens beginning with 'a' and 'y' were not converted
• Move project to VS2019 v142 toolset, xp builds still at v141_xp
• update current Avisynth+ headers
• update source to use boost 1.70 lib v142 for non-xp builds

v2.2.18 (20180905)

• mt_merge: fix right side artifacts for non-mod16 width, AVX2 and luma=false (regression in 2.2.16)
• mt_adddiff: fix 32 bit chroma (still used 0.5 centered chroma instead of 0.0)

v2.2.17 (20180710)

• mt_convolution: check plane dimensions to exceed convolution horizontal/vertical size
• lut functions: plane order to RGBA from BGRA like in Expr.
  expr parameters y-u-v-a naming matches now to r-g-b-a
• for luts: use_expr=3: always send expression(s) to Expr

v2.2.16 (20180702)

• mt_merge new parameter hint for chroma placement when luma=true and 4:2:0/4:2:2
  String 'cplace': possible values "mpeg1" or "mpeg2" (default)
  Parameter is effective only for 420 and 422 formats, otherwise ignored.
  Default "mpeg1" is using fast 2x2 pixel (1x2 for 4:2:2) averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format (old behaviour)
  420 schema:
  +------+------+
  | 0.25 | 0.25 |
  |------+------|
  | 0.25 | 0.25 |
  +------+------+

  "mpeg2" is using 2x3 (1x3 for 4:2:2) pixel weighted averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format
  420 schema:
  ------+------+-------+
  0.125 | 0.25 | 0.125 |
  ------|------+-------|
  0.125 | 0.25 | 0.125 |
  ------+------+-------+

• 32 bit float U and V chroma channels are now zero based (+/-0.5 for full scale). Was: 0..1, same as luma
  Since internal format changed, use Avisynth+ r2724 or newer for this masktools2 2.2.16.
  Affected predefined expression constants when plane is U or V:
  cmin and cmax (limited range (16-128)/255 and (240-128)/255 instead of 16/255.0 and 240/255.0
  range_max: 0.5 instead of 1.0
  new: introduce range_min: -0.5 for float U/V chroma, 0 otherwise
  range_half (0.0 instead of 0.5)
  (range_size remained 1.0)

• New expression syntax for Lut expressions: autoscale any input (x,y,z,a) bit depths to 8-16 bits for internal
  expression use. The primary reason of this feature is the "easy" usage of formerly written 8 bit optimized expressions. Parameters for lut functions: scale_inputs, clamp_float (similar to avs+ r2728) and use_expr

• New parameter: String "scale_inputs": "all","allf","int","intf","float","floatf","none", default "none". See Readme!

• New parameter: Boolean "clamp_float": default false, but treated as always true (and thus ignored) when scale_inputs involves a float autoscale.

• New parameter: Boolean "use_expr": default 0, calls fast JIT-compiled "Expr" in Avisynth+ for mt_lut, lutxy, lutxyz, lutxyza
  0: no Expr, use slow internal realtime calc if needed (as before)
  1: call Expr for bits>8 or lutxyza
  2: call Expr, when masktools would do its slow realtime calc (see 'realtime' column in the table above)
  Extends and replaces experimental clamp_xxxx keywords.

v2.2.15 (skipped, test versions)

v2.2.14 (20180225)

• Fix: mt_convolution invalid instruction on processors below SSE4.1

v2.2.13 (20180201)

• Fix: rare crash in multithreading environment at the very first frames
  (keeping XP compatibility with /Z:threadsafeinit- caused troubles!)
• mt_edge: AVX2 (1.4-1.9x speed) for 8 and 10-16 bits
• fix: "chroma" parameter with negative (memset) values were not working properly for 10-14 bits and 32bit float

v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.18

Changelog

v2.2.18 (20180905)

• mt_merge: fix right side artifacts for non-mod16 width, AVX2 and luma=false (regression in 2.2.16)
• mt_adddiff: fix 32 bit chroma (still used 0.5 centered chroma instead of 0.0)

v2.2.17 (20180710)

• mt_convolution: check plane dimensions to exceed convolution horizontal/vertical size
• lut functions: plane order to RGBA from BGRA like in Expr.
  expr parameters y-u-v-a naming matches now to r-g-b-a
• for luts: use_expr=3: always send expression(s) to Expr

v2.2.16 (20180702)

• mt_merge new parameter hint for chroma placement when luma=true and 4:2:0/4:2:2
  String 'cplace': possible values "mpeg1" or "mpeg2" (default)
  Parameter is effective only for 420 and 422 formats, otherwise ignored.
  Default "mpeg1" is using fast 2x2 pixel (1x2 for 4:2:2) averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format (old behaviour)
  420 schema:
  +------+------+
  | 0.25 | 0.25 |
  |------+------|
  | 0.25 | 0.25 |
  +------+------+

  "mpeg2" is using 2x3 (1x3 for 4:2:2) pixel weighted averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format
  420 schema:
  ------+------+-------+
  0.125 | 0.25 | 0.125 |
  ------|------+-------|
  0.125 | 0.25 | 0.125 |
  ------+------+-------+

• 32 bit float U and V chroma channels are now zero based (+/-0.5 for full scale). Was: 0..1, same as luma
  Since internal format changed, use Avisynth+ r2724 or newer for this masktools2 2.2.16.
  Affected predefined expression constants when plane is U or V:
  cmin and cmax (limited range (16-128)/255 and (240-128)/255 instead of 16/255.0 and 240/255.0
  range_max: 0.5 instead of 1.0
  new: introduce range_min: -0.5 for float U/V chroma, 0 otherwise
  range_half (0.0 instead of 0.5)
  (range_size remained 1.0)

• New expression syntax for Lut expressions: autoscale any input (x,y,z,a) bit depths to 8-16 bits for internal
  expression use. The primary reason of this feature is the "easy" usage of formerly written 8 bit optimized expressions. Parameters for lut functions: scale_inputs, clamp_float (similar to avs+ r2728) and use_expr

• New parameter: String "scale_inputs": "all","allf","int","intf","float","floatf","none", default "none". See Readme!

• New parameter: Boolean "clamp_float": default false, but treated as always true (and thus ignored) when scale_inputs involves a float autoscale.

• New parameter: Boolean "use_expr": default 0, calls fast JIT-compiled "Expr" in Avisynth+ for mt_lut, lutxy, lutxyz, lutxyza
  0: no Expr, use slow internal realtime calc if needed (as before)
  1: call Expr for bits>8 or lutxyza
  2: call Expr, when masktools would do its slow realtime calc (see 'realtime' column in the table above)
  Extends and replaces experimental clamp_xxxx keywords.

v2.2.15 (skipped, test versions)

v2.2.14 (20180225)

• Fix: mt_convolution invalid instruction on processors below SSE4.1

v2.2.13 (20180201)

• Fix: rare crash in multithreading environment at the very first frames
  (keeping XP compatibility with /Z:threadsafeinit- caused troubles!)
• mt_edge: AVX2 (1.4-1.9x speed) for 8 and 10-16 bits
• fix: "chroma" parameter with negative (memset) values were not working properly for 10-14 bits and 32bit float

v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.17

Changelog

v2.2.17 (20180710)

• mt_convolution: check plane dimensions to exceed convolution horizontal/vertical size
• lut functions: plane order to RGBA from BGRA like in Expr.
  expr parameters y-u-v-a naming matches now to r-g-b-a
• for luts: use_expr=3: always send expression(s) to Expr

v2.2.16 (20180702)

• mt_merge new parameter hint for chroma placement when luma=true and 4:2:0/4:2:2
  String 'cplace': possible values "mpeg1" or "mpeg2" (default)
  Parameter is effective only for 420 and 422 formats, otherwise ignored.
  Default "mpeg1" is using fast 2x2 pixel (1x2 for 4:2:2) averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format (old behaviour)
  420 schema:
  +------+------+
  | 0.25 | 0.25 |
  |------+------|
  | 0.25 | 0.25 |
  +------+------+

  "mpeg2" is using 2x3 (1x3 for 4:2:2) pixel weighted averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format
  420 schema:
  ------+------+-------+
  0.125 | 0.25 | 0.125 |
  ------|------+-------|
  0.125 | 0.25 | 0.125 |
  ------+------+-------+

• 32 bit float U and V chroma channels are now zero based (+/-0.5 for full scale). Was: 0..1, same as luma
  Since internal format changed, use Avisynth+ r2724 or newer for this masktools2 2.2.16.
  Affected predefined expression constants when plane is U or V:
  cmin and cmax (limited range (16-128)/255 and (240-128)/255 instead of 16/255.0 and 240/255.0
  range_max: 0.5 instead of 1.0
  new: introduce range_min: -0.5 for float U/V chroma, 0 otherwise
  range_half (0.0 instead of 0.5)
  (range_size remained 1.0)

• New expression syntax for Lut expressions: autoscale any input (x,y,z,a) bit depths to 8-16 bits for internal
  expression use. The primary reason of this feature is the "easy" usage of formerly written 8 bit optimized expressions. Parameters for lut functions: scale_inputs, clamp_float (similar to avs+ r2728) and use_expr

• New parameter: String "scale_inputs": "all","allf","int","intf","float","floatf","none", default "none". See Readme!

• New parameter: Boolean "clamp_float": default false, but treated as always true (and thus ignored) when scale_inputs involves a float autoscale.

• New parameter: Boolean "use_expr": default 0, calls fast JIT-compiled "Expr" in Avisynth+ for mt_lut, lutxy, lutxyz, lutxyza
  0: no Expr, use slow internal realtime calc if needed (as before)
  1: call Expr for bits>8 or lutxyza
  2: call Expr, when masktools would do its slow realtime calc (see 'realtime' column in the table above)
  Extends and replaces experimental clamp_xxxx keywords.

v2.2.15 (skipped, test versions)

v2.2.14 (20180225)

• Fix: mt_convolution invalid instruction on processors below SSE4.1

v2.2.13 (20180201)

• Fix: rare crash in multithreading environment at the very first frames
  (keeping XP compatibility with /Z:threadsafeinit- caused troubles!)
• mt_edge: AVX2 (1.4-1.9x speed) for 8 and 10-16 bits
• fix: "chroma" parameter with negative (memset) values were not working properly for 10-14 bits and 32bit float

v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.16

Changelog

v2.2.16 (20180702)

• mt_merge new parameter hint for chroma placement when luma=true and 4:2:0/4:2:2
  String 'cplace': possible values "mpeg1" or "mpeg2" (default)
  Parameter is effective only for 420 and 422 formats, otherwise ignored.
  Default "mpeg1" is using fast 2x2 pixel (1x2 for 4:2:2) averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format (old behaviour)
  420 schema:
  +------+------+
  | 0.25 | 0.25 |
  |------+------|
  | 0.25 | 0.25 |
  +------+------+

  "mpeg2" is using 2x3 (1x3 for 4:2:2) pixel weighted averaging when converting a 4:4:4 mask to a 4:2:0 or 4:2:2 format
  420 schema:
  ------+------+-------+
  0.125 | 0.25 | 0.125 |
  ------|------+-------|
  0.125 | 0.25 | 0.125 |
  ------+------+-------+

• 32 bit float U and V chroma channels are now zero based (+/-0.5 for full scale). Was: 0..1, same as luma
  Since internal format changed, use Avisynth+ r2724 or newer for this masktools2 2.2.16.
  Affected predefined expression constants when plane is U or V:
  cmin and cmax (limited range (16-128)/255 and (240-128)/255 instead of 16/255.0 and 240/255.0
  range_max: 0.5 instead of 1.0
  new: introduce range_min: -0.5 for float U/V chroma, 0 otherwise
  range_half (0.0 instead of 0.5)
  (range_size remained 1.0)

• New expression syntax for Lut expressions: autoscale any input (x,y,z,a) bit depths to 8-16 bits for internal
  expression use. The primary reason of this feature is the "easy" usage of formerly written 8 bit optimized expressions. Parameters for lut functions: scale_inputs, clamp_float (similar to avs+ r2728) and use_expr

• New parameter: String "scale_inputs": "all","allf","int","intf","float","floatf","none", default "none". See Readme!

• New parameter: Boolean "clamp_float": default false, but treated as always true (and thus ignored) when scale_inputs involves a float autoscale.

• New parameter: Boolean "use_expr": default 0, calls fast JIT-compiled "Expr" in Avisynth+ for mt_lut, lutxy, lutxyz, lutxyza
  0: no Expr, use slow internal realtime calc if needed (as before)
  1: call Expr for bits>8 or lutxyza
  2: call Expr, when masktools would do its slow realtime calc (see 'realtime' column in the table above)
  Extends and replaces experimental clamp_xxxx keywords.

v2.2.15 (skipped, test versions)

v2.2.14 (20180225)

• Fix: mt_convolution invalid instruction on processors below SSE4.1

v2.2.13 (20180201)

• Fix: rare crash in multithreading environment at the very first frames
  (keeping XP compatibility with /Z:threadsafeinit- caused troubles!)
• mt_edge: AVX2 (1.4-1.9x speed) for 8 and 10-16 bits
• fix: "chroma" parameter with negative (memset) values were not working properly for 10-14 bits and 32bit float

v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.14

Changelog
v2.2.14 (20180225)

• Fix: mt_convolution invalid instruction on processors below SSE4.1

v2.2.13 (20180201)

• Fix: rare crash in multithreading environment at the very first frames
  (keeping XP compatibility with /Z:threadsafeinit- caused troubles!)
• mt_edge: AVX2 (1.4-1.9x speed) for 8 and 10-16 bits
• fix: "chroma" parameter with negative (memset) values were not working properly for 10-14 bits and 32bit float

v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.13

Changelog
v2.2.13 (20180201)

• Fix: rare crash in multithreading environment at the very first frames
  (keeping XP compatibility with /Z:threadsafeinit- caused troubles!)
• mt_edge: AVX2 (1.4-1.9x speed) for 8 and 10-16 bits
• fix: "chroma" parameter with negative (memset) values were not working properly for 10-14 bits and 32bit float

v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.12

Changelog
v2.2.12 (20180107)

• Fix: mt_merge 10-16 bits: right side artifacts when clip is non-mod 8 (non-AVX2) or mod16 (AVX2) widths

Earlier changes
v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.11

Changelog
**v2.2.11 (20180105)

• Fix: mt_merge luma=true: broken output when: 8-16 bits AVX2, 32 bit float: SSE2, AVX
• move project to VS2017, vs141_xp toolset

Earlier changes
v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

Masktools2 2.2.10

Changelog
v2.2.10 (20170612)

• Fix: luts internal buffer overflow (crash)
• Speed: mt_inpand/mt_expand: 10-16 bits SSE4 (10-15x speed)
• Speed: mt_inflate/mt_deflate 10-16 bits SSE4 (4x speed)

v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

v2.2.8 (20170427)

• Fix: "chroma" and "alpha" parameter should be scaled like "Y","U","V" and "A" when providing negative (memset) values

v2.2.7 (20170421)

• fix: mt_edge 10,12,14 bits: clamp mask value from 65535 to 1023 (10 bits), 4095 (12 bits) and 16383 (14 bits)
• fix: mt_merge 10-16 bits + non mod-16 width + luma=true + 4:2:2 colorspace, correct right side pixels
• fix: mt_merge 8 bit clips: keep original pixels from clip1/2 when mask is exactly 0 or 255
• YUVA, RGBAP support 8-32 bits
  • "A" parameter like "Y", "U" and "V". Default value for "A" is 1 (do nothing, same as for "U" and "V")
  • "alpha" parameter like "chroma" - overrides default plane mode
  • aExpr parameter for lut-type filters like uExpr, and vExpr
  • awExpr parameter for mt_luts like uwExpr, and vwExpr
  • dual signature filters (both integer and float) are provided in separate binaries
    In some cases specifying two different parameter lists with the same variables can cause troubles.
    (dual signature version can be used to override an earlierly loaded different masktools version
    (e.g. a 2.5 plugin) by defining the filters with both integer parameters AND the new float parameter lists)
• Make "scaleparams" to work consistent with all filters and parameters:
  parameters "Y","U","V" and "A" negative (memset) values are scaled automatically to the current bit depth from a default 8-bit value.
• New plane mode: 6 (copy from fourth clip) for "Y", "U", "V" and "A"
  New "chroma" and "alpha" plane mode override: "copy fourth"
  Use for mt_lutxyza which has four clips

For earlier changes see readme

Masktools2 2.2.9

Changelog
v2.2.9 (20170608)

• Add "none" and "ignore" to valid values for "chroma" and "alpha" parameters.
• Report error for invalid "chroma" or "alpha" parameter values instead of exception

v2.2.8 (20170427)

• Fix: "chroma" and "alpha" parameter should be scaled like "Y","U","V" and "A" when providing negative (memset) values

v2.2.7 (20170421)

• fix: mt_edge 10,12,14 bits: clamp mask value from 65535 to 1023 (10 bits), 4095 (12 bits) and 16383 (14 bits)
• fix: mt_merge 10-16 bits + non mod-16 width + luma=true + 4:2:2 colorspace, correct right side pixels
• fix: mt_merge 8 bit clips: keep original pixels from clip1/2 when mask is exactly 0 or 255
• YUVA, RGBAP support 8-32 bits
  • "A" parameter like "Y", "U" and "V". Default value for "A" is 1 (do nothing, same as for "U" and "V")
  • "alpha" parameter like "chroma" - overrides default plane mode
  • aExpr parameter for lut-type filters like uExpr, and vExpr
  • awExpr parameter for mt_luts like uwExpr, and vwExpr
  • dual signature filters (both integer and float) are provided in separate binaries
    In some cases specifying two different parameter lists with the same variables can cause troubles.
    (dual signature version can be used to override an earlierly loaded different masktools version
    (e.g. a 2.5 plugin) by defining the filters with both integer parameters AND the new float parameter lists)
• Make "scaleparams" to work consistent with all filters and parameters:
  parameters "Y","U","V" and "A" negative (memset) values are scaled automatically to the current bit depth from a default 8-bit value.
• New plane mode: 6 (copy from fourth clip) for "Y", "U", "V" and "A"
  New "chroma" and "alpha" plane mode override: "copy fourth"
  Use for mt_lutxyza which has four clips

For earlier changes see readme