| /* |
| * 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_BITREADER_H_ |
| #define AOM_AOM_DSP_BITREADER_H_ |
| |
| #include <assert.h> |
| #include <limits.h> |
| |
| #include "config/aom_config.h" |
| |
| #include "aom/aomdx.h" |
| #include "aom/aom_integer.h" |
| #include "aom_dsp/daalaboolreader.h" |
| #include "aom_dsp/prob.h" |
| #include "av1/common/odintrin.h" |
| |
| #if CONFIG_ACCOUNTING |
| #include "av1/decoder/accounting.h" |
| #define ACCT_STR_NAME acct_str |
| #define ACCT_STR_PARAM , const char *ACCT_STR_NAME |
| #define ACCT_STR_ARG(s) , s |
| #else |
| #define ACCT_STR_PARAM |
| #define ACCT_STR_ARG(s) |
| #endif |
| #if CONFIG_INTRA_ENTROPY |
| #include "av1/common/entropymode.h" |
| #endif // CONFIG_INTRA_ENTROPY |
| |
| #define aom_read(r, prob, ACCT_STR_NAME) \ |
| aom_read_(r, prob ACCT_STR_ARG(ACCT_STR_NAME)) |
| #define aom_read_bit(r, ACCT_STR_NAME) \ |
| aom_read_bit_(r ACCT_STR_ARG(ACCT_STR_NAME)) |
| #define aom_read_tree(r, tree, probs, ACCT_STR_NAME) \ |
| aom_read_tree_(r, tree, probs ACCT_STR_ARG(ACCT_STR_NAME)) |
| #define aom_read_literal(r, bits, ACCT_STR_NAME) \ |
| aom_read_literal_(r, bits ACCT_STR_ARG(ACCT_STR_NAME)) |
| #define aom_read_cdf(r, cdf, nsymbs, ACCT_STR_NAME) \ |
| aom_read_cdf_(r, cdf, nsymbs ACCT_STR_ARG(ACCT_STR_NAME)) |
| #define aom_read_symbol(r, cdf, nsymbs, ACCT_STR_NAME) \ |
| aom_read_symbol_(r, cdf, nsymbs ACCT_STR_ARG(ACCT_STR_NAME)) |
| #if CONFIG_INTRA_ENTROPY |
| #define aom_read_symbol_nn(r, cdf, nn_model, nsymbs, ACCT_STR_NAME) \ |
| aom_read_symbol_nn_(r, cdf, nn_model, nsymbs ACCT_STR_ARG(ACCT_STR_NAME)) |
| #endif // CONFIG_INTRA_ENTROPY |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| typedef struct daala_reader aom_reader; |
| |
| static INLINE int aom_reader_init(aom_reader *r, const uint8_t *buffer, |
| size_t size) { |
| return aom_daala_reader_init(r, buffer, (int)size); |
| } |
| |
| static INLINE const uint8_t *aom_reader_find_begin(aom_reader *r) { |
| return aom_daala_reader_find_begin(r); |
| } |
| |
| static INLINE const uint8_t *aom_reader_find_end(aom_reader *r) { |
| return aom_daala_reader_find_end(r); |
| } |
| |
| // Returns true if the bit reader has tried to decode more data from the buffer |
| // than was actually provided. |
| static INLINE int aom_reader_has_overflowed(const aom_reader *r) { |
| return aom_daala_reader_has_overflowed(r); |
| } |
| |
| // Returns the position in the bit reader in bits. |
| static INLINE uint32_t aom_reader_tell(const aom_reader *r) { |
| return aom_daala_reader_tell(r); |
| } |
| |
| // Returns the position in the bit reader in 1/8th bits. |
| static INLINE uint32_t aom_reader_tell_frac(const aom_reader *r) { |
| return aom_daala_reader_tell_frac(r); |
| } |
| |
| #if CONFIG_ACCOUNTING |
| static INLINE void aom_process_accounting(const aom_reader *r ACCT_STR_PARAM) { |
| if (r->accounting != NULL) { |
| uint32_t tell_frac; |
| tell_frac = aom_reader_tell_frac(r); |
| aom_accounting_record(r->accounting, ACCT_STR_NAME, |
| tell_frac - r->accounting->last_tell_frac); |
| r->accounting->last_tell_frac = tell_frac; |
| } |
| } |
| |
| static INLINE void aom_update_symb_counts(const aom_reader *r, int is_binary) { |
| if (r->accounting != NULL) { |
| r->accounting->syms.num_multi_syms += !is_binary; |
| r->accounting->syms.num_binary_syms += !!is_binary; |
| } |
| } |
| #endif |
| |
| static INLINE int aom_read_(aom_reader *r, int prob ACCT_STR_PARAM) { |
| int ret; |
| ret = aom_daala_read(r, prob); |
| #if CONFIG_ACCOUNTING |
| if (ACCT_STR_NAME) aom_process_accounting(r, ACCT_STR_NAME); |
| aom_update_symb_counts(r, 1); |
| #endif |
| return ret; |
| } |
| |
| static INLINE int aom_read_bit_(aom_reader *r ACCT_STR_PARAM) { |
| int ret; |
| ret = aom_read(r, 128, NULL); // aom_prob_half |
| #if CONFIG_ACCOUNTING |
| if (ACCT_STR_NAME) aom_process_accounting(r, ACCT_STR_NAME); |
| #endif |
| return ret; |
| } |
| |
| static INLINE int aom_read_literal_(aom_reader *r, int bits ACCT_STR_PARAM) { |
| int literal = 0, bit; |
| |
| for (bit = bits - 1; bit >= 0; bit--) literal |= aom_read_bit(r, NULL) << bit; |
| #if CONFIG_ACCOUNTING |
| if (ACCT_STR_NAME) aom_process_accounting(r, ACCT_STR_NAME); |
| #endif |
| return literal; |
| } |
| |
| static INLINE int aom_read_cdf_(aom_reader *r, const aom_cdf_prob *cdf, |
| int nsymbs ACCT_STR_PARAM) { |
| int ret; |
| ret = daala_read_symbol(r, cdf, nsymbs); |
| |
| #if CONFIG_ACCOUNTING |
| if (ACCT_STR_NAME) aom_process_accounting(r, ACCT_STR_NAME); |
| aom_update_symb_counts(r, (nsymbs == 2)); |
| #endif |
| return ret; |
| } |
| |
| static INLINE int aom_read_symbol_(aom_reader *r, aom_cdf_prob *cdf, |
| int nsymbs ACCT_STR_PARAM) { |
| int ret; |
| ret = aom_read_cdf(r, cdf, nsymbs, ACCT_STR_NAME); |
| if (r->allow_update_cdf) update_cdf(cdf, ret, nsymbs); |
| return ret; |
| } |
| |
| #if CONFIG_INTRA_ENTROPY |
| static INLINE int aom_read_symbol_nn_(aom_reader *r, aom_cdf_prob *cdf, |
| NN_CONFIG_EM *nn_model, |
| int nsymbs ACCT_STR_PARAM) { |
| const int ret = aom_read_cdf(r, cdf, nsymbs, ACCT_STR_NAME); |
| if (r->allow_update_cdf) { |
| av1_nn_backprop_em(nn_model, ret); |
| av1_nn_update_em(nn_model, nn_model->lr); |
| } |
| return ret; |
| } |
| #endif // CONFIG_INTRA_ENTROPY |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AOM_DSP_BITREADER_H_ |