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Diffstat (limited to 'third_party/aom/aom_dsp/bitwriter.h')
| -rw-r--r-- | third_party/aom/aom_dsp/bitwriter.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/bitwriter.h b/third_party/aom/aom_dsp/bitwriter.h new file mode 100644 index 000000000..6e3fac260 --- /dev/null +++ b/third_party/aom/aom_dsp/bitwriter.h @@ -0,0 +1,255 @@ +/* + * 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_DSP_BITWRITER_H_ +#define AOM_DSP_BITWRITER_H_ + +#include <assert.h> +#include "./aom_config.h" +#if CONFIG_EC_ADAPT && !CONFIG_EC_MULTISYMBOL +#error "CONFIG_EC_ADAPT is enabled without enabling CONFIG_EC_MULTISYMBOL" +#endif + +#if CONFIG_ANS +#include "aom_dsp/buf_ans.h" +#elif CONFIG_DAALA_EC +#include "aom_dsp/daalaboolwriter.h" +#else +#include "aom_dsp/dkboolwriter.h" +#endif +#include "aom_dsp/prob.h" + +#if CONFIG_RD_DEBUG +#include "av1/common/blockd.h" +#include "av1/encoder/cost.h" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#if CONFIG_ANS +typedef struct BufAnsCoder aom_writer; +#elif CONFIG_DAALA_EC +typedef struct daala_writer aom_writer; +#else +typedef struct aom_dk_writer aom_writer; +#endif + +typedef struct TOKEN_STATS { + int cost; +#if CONFIG_VAR_TX +#if CONFIG_RD_DEBUG + int txb_coeff_cost_map[TXB_COEFF_COST_MAP_SIZE][TXB_COEFF_COST_MAP_SIZE]; +#endif +#endif +} TOKEN_STATS; + +static INLINE void init_token_stats(TOKEN_STATS *token_stats) { +#if CONFIG_VAR_TX +#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 +#endif + token_stats->cost = 0; +} + +static INLINE void aom_start_encode(aom_writer *bc, uint8_t *buffer) { +#if CONFIG_ANS + (void)bc; + (void)buffer; + assert(0 && "buf_ans requires a more complicated startup procedure"); +#elif CONFIG_DAALA_EC + aom_daala_start_encode(bc, buffer); +#else + aom_dk_start_encode(bc, buffer); +#endif +} + +static INLINE void aom_stop_encode(aom_writer *bc) { +#if CONFIG_ANS + (void)bc; + assert(0 && "buf_ans requires a more complicated shutdown procedure"); +#elif CONFIG_DAALA_EC + aom_daala_stop_encode(bc); +#else + aom_dk_stop_encode(bc); +#endif +} + +static INLINE void aom_write(aom_writer *br, int bit, int probability) { +#if CONFIG_ANS + buf_rabs_write(br, bit, probability); +#elif CONFIG_DAALA_EC + aom_daala_write(br, bit, probability); +#else + aom_dk_write(br, bit, probability); +#endif +} + +static INLINE void aom_write_record(aom_writer *br, int bit, int probability, + TOKEN_STATS *token_stats) { + aom_write(br, bit, probability); +#if CONFIG_RD_DEBUG + token_stats->cost += av1_cost_bit(probability, bit); +#else + (void)token_stats; +#endif +} + +static INLINE void aom_write_bit(aom_writer *w, int bit) { +#if CONFIG_ANS + buf_rabs_write_bit(w, bit); +#elif CONFIG_DAALA_EC && CONFIG_RAWBITS + // Note this uses raw bits and is not the same as aom_daala_write(r, 128); + aom_daala_write_bit(w, bit); +#else + aom_write(w, bit, 128); // aom_prob_half +#endif +} + +static INLINE void aom_write_bit_record(aom_writer *w, int bit, + TOKEN_STATS *token_stats) { + aom_write_bit(w, bit); +#if CONFIG_RD_DEBUG + token_stats->cost += av1_cost_bit(128, bit); // aom_prob_half +#else + (void)token_stats; +#endif +} + +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_tree_as_bits(aom_writer *w, + const aom_tree_index *tr, + const aom_prob *probs, int bits, + int len, aom_tree_index i) { + do { + const int bit = (bits >> --len) & 1; + aom_write(w, bit, probs[i >> 1]); + i = tr[i + bit]; + } while (len); +} + +static INLINE void aom_write_tree_as_bits_record( + aom_writer *w, const aom_tree_index *tr, const aom_prob *probs, int bits, + int len, aom_tree_index i, TOKEN_STATS *token_stats) { + do { + const int bit = (bits >> --len) & 1; + aom_write_record(w, bit, probs[i >> 1], token_stats); + i = tr[i + bit]; + } while (len); +} + +#if CONFIG_EC_MULTISYMBOL +static INLINE void aom_write_cdf(aom_writer *w, int symb, + const aom_cdf_prob *cdf, int nsymbs) { +#if CONFIG_ANS + (void)nsymbs; + assert(cdf); + const aom_cdf_prob cum_prob = symb > 0 ? cdf[symb - 1] : 0; + const aom_cdf_prob prob = cdf[symb] - cum_prob; + buf_rans_write(w, cum_prob, prob); +#elif CONFIG_DAALA_EC + daala_write_symbol(w, symb, cdf, nsymbs); +#else +#error \ + "CONFIG_EC_MULTISYMBOL is selected without a valid backing entropy " \ + "coder. Enable daala_ec or ans for a valid configuration." +#endif +} + +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 CONFIG_EC_ADAPT + update_cdf(cdf, symb, nsymbs); +#endif +} + +static INLINE void aom_write_tree_as_cdf(aom_writer *w, + const aom_tree_index *tree, + const aom_prob *probs, int bits, + int len, aom_tree_index i) { + aom_tree_index root; + root = i; + do { + aom_cdf_prob cdf[16]; + aom_tree_index index[16]; + int path[16]; + int dist[16]; + int nsymbs; + int symb; + int j; + /* Compute the CDF of the binary tree using the given probabilities. */ + nsymbs = tree_to_cdf(tree, probs, root, cdf, index, path, dist); + /* Find the symbol to code. */ + symb = -1; + for (j = 0; j < nsymbs; j++) { + /* If this symbol codes a leaf node, */ + if (index[j] <= 0) { + if (len == dist[j] && path[j] == bits) { + symb = j; + break; + } + } else { + if (len > dist[j] && path[j] == bits >> (len - dist[j])) { + symb = j; + break; + } + } + } + OD_ASSERT(symb != -1); + aom_write_cdf(w, symb, cdf, nsymbs); + bits &= (1 << (len - dist[symb])) - 1; + len -= dist[symb]; + } while (len); +} + +#endif // CONFIG_EC_MULTISYMBOL + +static INLINE void aom_write_tree(aom_writer *w, const aom_tree_index *tree, + const aom_prob *probs, int bits, int len, + aom_tree_index i) { +#if CONFIG_EC_MULTISYMBOL + aom_write_tree_as_cdf(w, tree, probs, bits, len, i); +#else + aom_write_tree_as_bits(w, tree, probs, bits, len, i); +#endif +} + +static INLINE void aom_write_tree_record(aom_writer *w, + const aom_tree_index *tree, + const aom_prob *probs, int bits, + int len, aom_tree_index i, + TOKEN_STATS *token_stats) { +#if CONFIG_EC_MULTISYMBOL + (void)token_stats; + aom_write_tree_as_cdf(w, tree, probs, bits, len, i); +#else + aom_write_tree_as_bits_record(w, tree, probs, bits, len, i, token_stats); +#endif +} + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AOM_DSP_BITWRITER_H_ |