110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AOM_DSP_BITWRITER_H_
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#define AOM_AOM_DSP_BITWRITER_H_
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#include <assert.h>
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#include "config/aom_config.h"
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#include "aom_dsp/entenc.h"
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#include "aom_dsp/prob.h"
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#if CONFIG_RD_DEBUG
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#include "av1/common/blockd.h"
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#include "av1/encoder/cost.h"
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#endif
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#if CONFIG_BITSTREAM_DEBUG
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#include "aom_util/debug_util.h"
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#endif // CONFIG_BITSTREAM_DEBUG
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct aom_writer {
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unsigned int pos;
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uint8_t *buffer;
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od_ec_enc ec;
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uint8_t allow_update_cdf;
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};
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typedef struct aom_writer aom_writer;
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typedef struct TOKEN_STATS {
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int cost;
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#if CONFIG_RD_DEBUG
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int txb_coeff_cost_map[TXB_COEFF_COST_MAP_SIZE][TXB_COEFF_COST_MAP_SIZE];
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#endif
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} TOKEN_STATS;
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static inline void init_token_stats(TOKEN_STATS *token_stats) {
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#if CONFIG_RD_DEBUG
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int r, c;
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for (r = 0; r < TXB_COEFF_COST_MAP_SIZE; ++r) {
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for (c = 0; c < TXB_COEFF_COST_MAP_SIZE; ++c) {
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token_stats->txb_coeff_cost_map[r][c] = 0;
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}
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}
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#endif
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token_stats->cost = 0;
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}
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void aom_start_encode(aom_writer *w, uint8_t *buffer);
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// Returns a negative number on error. Caller must check the return value and
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// handle error.
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int aom_stop_encode(aom_writer *w);
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int aom_tell_size(aom_writer *w);
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static inline void aom_write(aom_writer *w, int bit, int probability) {
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int p = (0x7FFFFF - (probability << 15) + probability) >> 8;
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#if CONFIG_BITSTREAM_DEBUG
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aom_cdf_prob cdf[2] = { (aom_cdf_prob)p, 32767 };
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bitstream_queue_push(bit, cdf, 2);
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#endif
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od_ec_encode_bool_q15(&w->ec, bit, p);
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}
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static inline void aom_write_bit(aom_writer *w, int bit) {
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aom_write(w, bit, 128); // aom_prob_half
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}
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static inline void aom_write_literal(aom_writer *w, int data, int bits) {
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int bit;
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for (bit = bits - 1; bit >= 0; bit--) aom_write_bit(w, 1 & (data >> bit));
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}
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static inline void aom_write_cdf(aom_writer *w, int symb,
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const aom_cdf_prob *cdf, int nsymbs) {
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#if CONFIG_BITSTREAM_DEBUG
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bitstream_queue_push(symb, cdf, nsymbs);
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#endif
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od_ec_encode_cdf_q15(&w->ec, symb, cdf, nsymbs);
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}
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static inline void aom_write_symbol(aom_writer *w, int symb, aom_cdf_prob *cdf,
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int nsymbs) {
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aom_write_cdf(w, symb, cdf, nsymbs);
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if (w->allow_update_cdf) update_cdf(cdf, symb, nsymbs);
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_AOM_DSP_BITWRITER_H_
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