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/*
* 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_AOM_DSP_BITWRITER_H_
#define AOM_AOM_DSP_BITWRITER_H_
#include <assert.h>
#include "config/aom_config.h"
#include "aom_dsp/entenc.h"
#include "aom_dsp/prob.h"
#if CONFIG_RD_DEBUG
#include "av1/common/blockd.h"
#include "av1/encoder/cost.h"
#endif
#if CONFIG_BITSTREAM_DEBUG
#include "aom_util/debug_util.h"
#endif // CONFIG_BITSTREAM_DEBUG
#ifdef __cplusplus
extern "C" {
#endif
struct aom_writer {
unsigned int pos;
uint8_t *buffer;
od_ec_enc ec;
uint8_t allow_update_cdf;
};
typedef struct aom_writer aom_writer;
typedef struct TOKEN_STATS {
int cost;
#if CONFIG_RD_DEBUG
int txb_coeff_cost_map[TXB_COEFF_COST_MAP_SIZE][TXB_COEFF_COST_MAP_SIZE];
#endif
} TOKEN_STATS;
static inline void init_token_stats(TOKEN_STATS *token_stats) {
#if CONFIG_RD_DEBUG
int r, c;
for (r = 0; r < TXB_COEFF_COST_MAP_SIZE; ++r) {
for (c = 0; c < TXB_COEFF_COST_MAP_SIZE; ++c) {
token_stats->txb_coeff_cost_map[r][c] = 0;
}
}
#endif
token_stats->cost = 0;
}
void aom_start_encode(aom_writer *w, uint8_t *buffer);
// Returns a negative number on error. Caller must check the return value and
// handle error.
int aom_stop_encode(aom_writer *w);
int aom_tell_size(aom_writer *w);
static inline void aom_write(aom_writer *w, int bit, int probability) {
int p = (0x7FFFFF - (probability << 15) + probability) >> 8;
#if CONFIG_BITSTREAM_DEBUG
aom_cdf_prob cdf[2] = { (aom_cdf_prob)p, 32767 };
bitstream_queue_push(bit, cdf, 2);
#endif
od_ec_encode_bool_q15(&w->ec, bit, p);
}
static inline void aom_write_bit(aom_writer *w, int bit) {
aom_write(w, bit, 128); // aom_prob_half
}
static inline void aom_write_literal(aom_writer *w, int data, int bits) {
int bit;
for (bit = bits - 1; bit >= 0; bit--) aom_write_bit(w, 1 & (data >> bit));
}
static inline void aom_write_cdf(aom_writer *w, int symb,
const aom_cdf_prob *cdf, int nsymbs) {
#if CONFIG_BITSTREAM_DEBUG
bitstream_queue_push(symb, cdf, nsymbs);
#endif
od_ec_encode_cdf_q15(&w->ec, symb, cdf, nsymbs);
}
static inline void aom_write_symbol(aom_writer *w, int symb, aom_cdf_prob *cdf,
int nsymbs) {
aom_write_cdf(w, symb, cdf, nsymbs);
if (w->allow_update_cdf) update_cdf(cdf, symb, nsymbs);
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AOM_DSP_BITWRITER_H_