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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/aom/av1/encoder/cost.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/aom/av1/encoder/cost.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/cost.h b/third_party/aom/av1/encoder/cost.h new file mode 100644 index 0000000000..be0241a820 --- /dev/null +++ b/third_party/aom/av1/encoder/cost.h @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#ifndef AOM_AV1_ENCODER_COST_H_ +#define AOM_AV1_ENCODER_COST_H_ + +#include "aom_dsp/prob.h" +#include "aom/aom_integer.h" + +#ifdef __cplusplus +extern "C" { +#endif + +extern const uint16_t av1_prob_cost[128]; + +// The factor to scale from cost in bits to cost in av1_prob_cost units. +#define AV1_PROB_COST_SHIFT 9 + +// Cost of coding an n bit literal, using 128 (i.e. 50%) probability +// for each bit. +#define av1_cost_literal(n) ((n) * (1 << AV1_PROB_COST_SHIFT)) + +// Calculate the cost of a symbol with probability p15 / 2^15 +static INLINE int av1_cost_symbol(aom_cdf_prob p15) { + // p15 can be out of range [1, CDF_PROB_TOP - 1]. Clamping it, so that the + // following cost calculation works correctly. Otherwise, if p15 = + // CDF_PROB_TOP, shift would be -1, and "p15 << shift" would be wrong. + p15 = (aom_cdf_prob)clamp(p15, 1, CDF_PROB_TOP - 1); + assert(0 < p15 && p15 < CDF_PROB_TOP); + const int shift = CDF_PROB_BITS - 1 - get_msb(p15); + const int prob = get_prob(p15 << shift, CDF_PROB_TOP); + assert(prob >= 128); + return av1_prob_cost[prob - 128] + av1_cost_literal(shift); +} + +void av1_cost_tokens_from_cdf(int *costs, const aom_cdf_prob *cdf, + const int *inv_map); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AOM_AV1_ENCODER_COST_H_ |