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Diffstat (limited to 'chromium/third_party/brotli/src/brotli/enc/literal_cost.h')
-rw-r--r-- | chromium/third_party/brotli/src/brotli/enc/literal_cost.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/chromium/third_party/brotli/src/brotli/enc/literal_cost.h b/chromium/third_party/brotli/src/brotli/enc/literal_cost.h new file mode 100644 index 00000000000..5c1eca4c247 --- /dev/null +++ b/chromium/third_party/brotli/src/brotli/enc/literal_cost.h @@ -0,0 +1,38 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// +// Literal cost model to allow backward reference replacement to be efficient. + +#ifndef BROTLI_ENC_LITERAL_COST_H_ +#define BROTLI_ENC_LITERAL_COST_H_ + +#include <stddef.h> +#include <stdint.h> + +namespace brotli { + +// Estimates how many bits the literals in the interval [pos, pos + len) in the +// ringbuffer (data, mask) will take entropy coded and writes these estimates +// to the ringbuffer (cost, mask). +void EstimateBitCostsForLiterals(size_t pos, size_t len, size_t mask, + size_t cost_mask, const uint8_t *data, + float *cost); + +void EstimateBitCostsForLiteralsUTF8(size_t pos, size_t len, size_t mask, + size_t cost_mask, const uint8_t *data, + float *cost); + +} // namespace brotli + +#endif // BROTLI_ENC_LITERAL_COST_H_ |