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Diffstat (limited to '')
-rw-r--r-- | third_party/aom/aom_dsp/entcode.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/entcode.h b/third_party/aom/aom_dsp/entcode.h new file mode 100644 index 0000000000..526ca598d3 --- /dev/null +++ b/third_party/aom/aom_dsp/entcode.h @@ -0,0 +1,41 @@ +/* + * Copyright (c) 2001-2016, 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_AOM_DSP_ENTCODE_H_ +#define AOM_AOM_DSP_ENTCODE_H_ + +#include <limits.h> +#include <stddef.h> +#include "aom_dsp/odintrin.h" +#include "aom_dsp/prob.h" + +#define EC_PROB_SHIFT 6 +#define EC_MIN_PROB 4 // must be <= (1<<EC_PROB_SHIFT)/16 + +/*OPT: od_ec_window must be at least 32 bits, but if you have fast arithmetic + on a larger type, you can speed up the decoder by using it here.*/ +typedef uint32_t od_ec_window; + +/*The size in bits of od_ec_window.*/ +#define OD_EC_WINDOW_SIZE ((int)sizeof(od_ec_window) * CHAR_BIT) + +/*The resolution of fractional-precision bit usage measurements, i.e., + 3 => 1/8th bits.*/ +#define OD_BITRES (3) + +#define OD_ICDF AOM_ICDF + +/*See entcode.c for further documentation.*/ + +OD_WARN_UNUSED_RESULT uint32_t od_ec_tell_frac(uint32_t nbits_total, + uint32_t rng); + +#endif // AOM_AOM_DSP_ENTCODE_H_ |