/src/libjxl/third_party/brotli/c/enc/cluster.c
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1 | | /* Copyright 2013 Google Inc. All Rights Reserved. |
2 | | |
3 | | Distributed under MIT license. |
4 | | See file LICENSE for detail or copy at https://opensource.org/licenses/MIT |
5 | | */ |
6 | | |
7 | | /* Functions for clustering similar histograms together. */ |
8 | | |
9 | | #include "cluster.h" |
10 | | |
11 | | #include "../common/platform.h" |
12 | | #include "bit_cost.h" /* BrotliPopulationCost */ |
13 | | #include "fast_log.h" |
14 | | #include "histogram.h" |
15 | | #include "memory.h" |
16 | | |
17 | | #if defined(__cplusplus) || defined(c_plusplus) |
18 | | extern "C" { |
19 | | #endif |
20 | | |
21 | | static BROTLI_INLINE BROTLI_BOOL HistogramPairIsLess( |
22 | 0 | const HistogramPair* p1, const HistogramPair* p2) { |
23 | 0 | if (p1->cost_diff != p2->cost_diff) { |
24 | 0 | return TO_BROTLI_BOOL(p1->cost_diff > p2->cost_diff); |
25 | 0 | } |
26 | 0 | return TO_BROTLI_BOOL((p1->idx2 - p1->idx1) > (p2->idx2 - p2->idx1)); |
27 | 0 | } |
28 | | |
29 | | /* Returns entropy reduction of the context map when we combine two clusters. */ |
30 | 0 | static BROTLI_INLINE double ClusterCostDiff(size_t size_a, size_t size_b) { |
31 | 0 | size_t size_c = size_a + size_b; |
32 | 0 | return (double)size_a * FastLog2(size_a) + |
33 | 0 | (double)size_b * FastLog2(size_b) - |
34 | 0 | (double)size_c * FastLog2(size_c); |
35 | 0 | } |
36 | | |
37 | 0 | #define CODE(X) X Unexecuted instantiation: BrotliCompareAndPushToQueueLiteral Unexecuted instantiation: BrotliHistogramCombineLiteral Unexecuted instantiation: BrotliHistogramBitCostDistanceLiteral Unexecuted instantiation: BrotliHistogramRemapLiteral Unexecuted instantiation: BrotliHistogramReindexLiteral Unexecuted instantiation: BrotliClusterHistogramsLiteral Unexecuted instantiation: BrotliCompareAndPushToQueueCommand Unexecuted instantiation: BrotliHistogramCombineCommand Unexecuted instantiation: BrotliHistogramBitCostDistanceCommand Unexecuted instantiation: BrotliHistogramRemapCommand Unexecuted instantiation: BrotliHistogramReindexCommand Unexecuted instantiation: BrotliClusterHistogramsCommand Unexecuted instantiation: BrotliCompareAndPushToQueueDistance Unexecuted instantiation: BrotliHistogramCombineDistance Unexecuted instantiation: BrotliHistogramBitCostDistanceDistance Unexecuted instantiation: BrotliHistogramRemapDistance Unexecuted instantiation: BrotliHistogramReindexDistance Unexecuted instantiation: BrotliClusterHistogramsDistance |
38 | | |
39 | | #define FN(X) X ## Literal |
40 | | #include "cluster_inc.h" /* NOLINT(build/include) */ |
41 | | #undef FN |
42 | | |
43 | | #define FN(X) X ## Command |
44 | | #include "cluster_inc.h" /* NOLINT(build/include) */ |
45 | | #undef FN |
46 | | |
47 | | #define FN(X) X ## Distance |
48 | | #include "cluster_inc.h" /* NOLINT(build/include) */ |
49 | | #undef FN |
50 | | |
51 | | #undef CODE |
52 | | |
53 | | #if defined(__cplusplus) || defined(c_plusplus) |
54 | | } /* extern "C" */ |
55 | | #endif |