1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp9/encoder/vp9_boolhuff.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,68 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +#include <assert.h>
1.15 +#include "vp9/encoder/vp9_boolhuff.h"
1.16 +#include "vp9/common/vp9_entropy.h"
1.17 +
1.18 +#if defined(SECTIONBITS_OUTPUT)
1.19 +unsigned __int64 Sectionbits[500];
1.20 +
1.21 +#endif
1.22 +
1.23 +#ifdef ENTROPY_STATS
1.24 +unsigned int active_section = 0;
1.25 +#endif
1.26 +
1.27 +const unsigned int vp9_prob_cost[256] = {
1.28 + 2047, 2047, 1791, 1641, 1535, 1452, 1385, 1328, 1279, 1235, 1196, 1161,
1.29 + 1129, 1099, 1072, 1046, 1023, 1000, 979, 959, 940, 922, 905, 889,
1.30 + 873, 858, 843, 829, 816, 803, 790, 778, 767, 755, 744, 733,
1.31 + 723, 713, 703, 693, 684, 675, 666, 657, 649, 641, 633, 625,
1.32 + 617, 609, 602, 594, 587, 580, 573, 567, 560, 553, 547, 541,
1.33 + 534, 528, 522, 516, 511, 505, 499, 494, 488, 483, 477, 472,
1.34 + 467, 462, 457, 452, 447, 442, 437, 433, 428, 424, 419, 415,
1.35 + 410, 406, 401, 397, 393, 389, 385, 381, 377, 373, 369, 365,
1.36 + 361, 357, 353, 349, 346, 342, 338, 335, 331, 328, 324, 321,
1.37 + 317, 314, 311, 307, 304, 301, 297, 294, 291, 288, 285, 281,
1.38 + 278, 275, 272, 269, 266, 263, 260, 257, 255, 252, 249, 246,
1.39 + 243, 240, 238, 235, 232, 229, 227, 224, 221, 219, 216, 214,
1.40 + 211, 208, 206, 203, 201, 198, 196, 194, 191, 189, 186, 184,
1.41 + 181, 179, 177, 174, 172, 170, 168, 165, 163, 161, 159, 156,
1.42 + 154, 152, 150, 148, 145, 143, 141, 139, 137, 135, 133, 131,
1.43 + 129, 127, 125, 123, 121, 119, 117, 115, 113, 111, 109, 107,
1.44 + 105, 103, 101, 99, 97, 95, 93, 92, 90, 88, 86, 84,
1.45 + 82, 81, 79, 77, 75, 73, 72, 70, 68, 66, 65, 63,
1.46 + 61, 60, 58, 56, 55, 53, 51, 50, 48, 46, 45, 43,
1.47 + 41, 40, 38, 37, 35, 33, 32, 30, 29, 27, 25, 24,
1.48 + 22, 21, 19, 18, 16, 15, 13, 12, 10, 9, 7, 6,
1.49 + 4, 3, 1, 1};
1.50 +
1.51 +void vp9_start_encode(vp9_writer *br, uint8_t *source) {
1.52 + br->lowvalue = 0;
1.53 + br->range = 255;
1.54 + br->value = 0;
1.55 + br->count = -24;
1.56 + br->buffer = source;
1.57 + br->pos = 0;
1.58 + vp9_write_bit(br, 0);
1.59 +}
1.60 +
1.61 +void vp9_stop_encode(vp9_writer *br) {
1.62 + int i;
1.63 +
1.64 + for (i = 0; i < 32; i++)
1.65 + vp9_write_bit(br, 0);
1.66 +
1.67 + // Ensure there's no ambigous collision with any index marker bytes
1.68 + if ((br->buffer[br->pos - 1] & 0xe0) == 0xc0)
1.69 + br->buffer[br->pos++] = 0;
1.70 +}
1.71 +
