diff options
Diffstat (limited to 'third_party/aom/aom_dsp/dkboolreader.h')
-rw-r--r-- | third_party/aom/aom_dsp/dkboolreader.h | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/third_party/aom/aom_dsp/dkboolreader.h b/third_party/aom/aom_dsp/dkboolreader.h deleted file mode 100644 index f0bc84381..000000000 --- a/third_party/aom/aom_dsp/dkboolreader.h +++ /dev/null @@ -1,181 +0,0 @@ -/* - * 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_DKBOOLREADER_H_ -#define AOM_DSP_DKBOOLREADER_H_ - -#include <assert.h> -#include <stddef.h> -#include <limits.h> - -#include "./aom_config.h" -#if CONFIG_BITSTREAM_DEBUG -#include <assert.h> -#include <stdio.h> -#include "aom_util/debug_util.h" -#endif // CONFIG_BITSTREAM_DEBUG - -#include "aom_ports/mem.h" -#include "aom/aomdx.h" -#include "aom/aom_integer.h" -#include "aom_dsp/prob.h" -#if CONFIG_ACCOUNTING -#include "av1/decoder/accounting.h" -#endif - -#ifdef __cplusplus -extern "C" { -#endif - -typedef size_t BD_VALUE; - -#define BD_VALUE_SIZE ((int)sizeof(BD_VALUE) * CHAR_BIT) - -// This is meant to be a large, positive constant that can still be efficiently -// loaded as an immediate (on platforms like ARM, for example). -// Even relatively modest values like 100 would work fine. -#define LOTS_OF_BITS 0x40000000 - -struct aom_dk_reader { - // Be careful when reordering this struct, it may impact the cache negatively. - BD_VALUE value; - unsigned int range; - int count; - const uint8_t *buffer_start; - const uint8_t *buffer_end; - const uint8_t *buffer; - aom_decrypt_cb decrypt_cb; - void *decrypt_state; - uint8_t clear_buffer[sizeof(BD_VALUE) + 1]; -#if CONFIG_ACCOUNTING - Accounting *accounting; -#endif -}; - -int aom_dk_reader_init(struct aom_dk_reader *r, const uint8_t *buffer, - size_t size, aom_decrypt_cb decrypt_cb, - void *decrypt_state); - -void aom_dk_reader_fill(struct aom_dk_reader *r); - -const uint8_t *aom_dk_reader_find_end(struct aom_dk_reader *r); - -static INLINE uint32_t aom_dk_reader_tell(const struct aom_dk_reader *r) { - const uint32_t bits_read = - (uint32_t)((r->buffer - r->buffer_start) * CHAR_BIT); - const int count = - (r->count < LOTS_OF_BITS) ? r->count : r->count - LOTS_OF_BITS; - assert(r->buffer >= r->buffer_start); - return bits_read - (count + CHAR_BIT); -} - -/*The resolution of fractional-precision bit usage measurements, i.e., - 3 => 1/8th bits.*/ -#define DK_BITRES (3) - -static INLINE uint32_t aom_dk_reader_tell_frac(const struct aom_dk_reader *r) { - uint32_t num_bits; - uint32_t range; - int l; - int i; - num_bits = aom_dk_reader_tell(r) << DK_BITRES; - range = r->range; - l = 0; - for (i = DK_BITRES; i-- > 0;) { - int b; - range = range * range >> 7; - b = (int)(range >> 8); - l = l << 1 | b; - range >>= b; - } - return num_bits - l; -} - -static INLINE int aom_dk_reader_has_error(struct aom_dk_reader *r) { - // Check if we have reached the end of the buffer. - // - // Variable 'count' stores the number of bits in the 'value' buffer, minus - // 8. The top byte is part of the algorithm, and the remainder is buffered - // to be shifted into it. So if count == 8, the top 16 bits of 'value' are - // occupied, 8 for the algorithm and 8 in the buffer. - // - // When reading a byte from the user's buffer, count is filled with 8 and - // one byte is filled into the value buffer. When we reach the end of the - // data, count is additionally filled with LOTS_OF_BITS. So when - // count == LOTS_OF_BITS - 1, the user's data has been exhausted. - // - // 1 if we have tried to decode bits after the end of stream was encountered. - // 0 No error. - return r->count > BD_VALUE_SIZE && r->count < LOTS_OF_BITS; -} - -static INLINE int aom_dk_read(struct aom_dk_reader *r, int prob) { - unsigned int bit = 0; - BD_VALUE value; - BD_VALUE bigsplit; - int count; - unsigned int range; - unsigned int split = (r->range * prob + (256 - prob)) >> CHAR_BIT; - - if (r->count < 0) aom_dk_reader_fill(r); - - value = r->value; - count = r->count; - - bigsplit = (BD_VALUE)split << (BD_VALUE_SIZE - CHAR_BIT); - - range = split; - - if (value >= bigsplit) { - range = r->range - split; - value = value - bigsplit; - bit = 1; - } - - { - register int shift = aom_norm[range]; - range <<= shift; - value <<= shift; - count -= shift; - } - r->value = value; - r->count = count; - r->range = range; - -#if CONFIG_BITSTREAM_DEBUG - { - int ref_bit, ref_prob; - const int queue_r = bitstream_queue_get_read(); - const int frame_idx = bitstream_queue_get_frame_read(); - bitstream_queue_pop(&ref_bit, &ref_prob); - if (prob != ref_prob) { - fprintf( - stderr, - "\n *** prob error, frame_idx_r %d prob %d ref_prob %d queue_r %d\n", - frame_idx, prob, ref_prob, queue_r); - assert(0); - } - if ((int)bit != ref_bit) { - fprintf(stderr, "\n *** bit error, frame_idx_r %d bit %d ref_bit %d\n", - frame_idx, bit, ref_bit); - assert(0); - } - } -#endif // CONFIG_BITSTREAM_DEBUG - - return bit; -} - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif // AOM_DSP_DKBOOLREADER_H_ |