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B44: replace tables with math #2125

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B44: replace tables with math #2125

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1898899
B44: replace expTable with math
aras-p Sep 8, 2025
e2812f3
B44: replace logTable with math
aras-p Sep 8, 2025
98d1a50
Remove unused b44ExpLogTable.cpp
aras-p Sep 8, 2025
179792c
B44: SIMD code paths in b44_convertFromLinear_16 / b44_convertToLinea…
aras-p Sep 10, 2025
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2 changes: 1 addition & 1 deletion BUILD.bazel
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Original file line number Diff line number Diff line change
Expand Up @@ -175,7 +175,7 @@ cc_library(
"src/lib/OpenEXRCore/float_vector.c",
"src/lib/OpenEXRCore/internal_attr.h",
"src/lib/OpenEXRCore/internal_b44.c",
"src/lib/OpenEXRCore/internal_b44_table.c",
"src/lib/OpenEXRCore/internal_b44_math.c",
"src/lib/OpenEXRCore/internal_bytes.h",
"src/lib/OpenEXRCore/internal_channel_list.h",
"src/lib/OpenEXRCore/internal_coding.h",
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108 changes: 0 additions & 108 deletions src/lib/OpenEXR/b44ExpLogTable.cpp
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This file was deleted.

2 changes: 1 addition & 1 deletion src/lib/OpenEXRCore/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@ openexr_define_library(OpenEXRCore
internal_zip.c
internal_pxr24.c
internal_b44.c
internal_b44_table.c
internal_b44_math.c
internal_piz.c
internal_ht.cpp
internal_ht_common.cpp
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22 changes: 4 additions & 18 deletions src/lib/OpenEXRCore/internal_b44.c
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Expand Up @@ -13,22 +13,8 @@

/**************************************/

extern const uint16_t* exrcore_expTable;
extern const uint16_t* exrcore_logTable;

static inline void
convertFromLinear (uint16_t s[16])
{
for (int i = 0; i < 16; ++i)
s[i] = exrcore_expTable[s[i]];
}

static inline void
convertToLinear (uint16_t s[16])
{
for (int i = 0; i < 16; ++i)
s[i] = exrcore_logTable[s[i]];
}
extern void b44_convertFromLinear_16 (uint16_t s[16]);
extern void b44_convertToLinear_16 (uint16_t s[16]);

/**************************************/

Expand Down Expand Up @@ -477,7 +463,7 @@ compress_b44_impl (exr_encode_pipeline_t* encode, int flat_field)
// results to the output buffer.
//

if (curc->p_linear) convertFromLinear (s);
if (curc->p_linear) b44_convertFromLinear_16 (s);

wcount = pack (s, out, flat_field, !(curc->p_linear));
out += wcount;
Expand Down Expand Up @@ -578,7 +564,7 @@ uncompress_b44_impl (
bIn += 14;
}

if (curc->p_linear) convertToLinear (s);
if (curc->p_linear) b44_convertToLinear_16 (s);

priv_from_native16 (s, 16);

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