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Diffstat (limited to 'thirdparty/libvpx/vpx_dsp/bitreader.c')
-rw-r--r--thirdparty/libvpx/vpx_dsp/bitreader.c103
1 files changed, 0 insertions, 103 deletions
diff --git a/thirdparty/libvpx/vpx_dsp/bitreader.c b/thirdparty/libvpx/vpx_dsp/bitreader.c
deleted file mode 100644
index 8140e78e70..0000000000
--- a/thirdparty/libvpx/vpx_dsp/bitreader.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
- *
- * Use of this source code is governed by a BSD-style license
- * that can be found in the LICENSE file in the root of the source
- * tree. An additional intellectual property rights grant can be found
- * in the file PATENTS. All contributing project authors may
- * be found in the AUTHORS file in the root of the source tree.
- */
-#include <stdlib.h>
-
-#include "./vpx_config.h"
-
-#include "vpx_dsp/bitreader.h"
-#include "vpx_dsp/prob.h"
-#include "vpx_dsp/vpx_dsp_common.h"
-#include "vpx_ports/mem.h"
-#include "vpx_mem/vpx_mem.h"
-#include "vpx_util/endian_inl.h"
-
-int vpx_reader_init(vpx_reader *r,
- const uint8_t *buffer,
- size_t size,
- vpx_decrypt_cb decrypt_cb,
- void *decrypt_state) {
- if (size && !buffer) {
- return 1;
- } else {
- r->buffer_end = buffer + size;
- r->buffer = buffer;
- r->value = 0;
- r->count = -8;
- r->range = 255;
- r->decrypt_cb = decrypt_cb;
- r->decrypt_state = decrypt_state;
- vpx_reader_fill(r);
- return vpx_read_bit(r) != 0; // marker bit
- }
-}
-
-void vpx_reader_fill(vpx_reader *r) {
- const uint8_t *const buffer_end = r->buffer_end;
- const uint8_t *buffer = r->buffer;
- const uint8_t *buffer_start = buffer;
- BD_VALUE value = r->value;
- int count = r->count;
- const size_t bytes_left = buffer_end - buffer;
- const size_t bits_left = bytes_left * CHAR_BIT;
- int shift = BD_VALUE_SIZE - CHAR_BIT - (count + CHAR_BIT);
-
- if (r->decrypt_cb) {
- size_t n = VPXMIN(sizeof(r->clear_buffer), bytes_left);
- r->decrypt_cb(r->decrypt_state, buffer, r->clear_buffer, (int)n);
- buffer = r->clear_buffer;
- buffer_start = r->clear_buffer;
- }
- if (bits_left > BD_VALUE_SIZE) {
- const int bits = (shift & 0xfffffff8) + CHAR_BIT;
- BD_VALUE nv;
- BD_VALUE big_endian_values;
- memcpy(&big_endian_values, buffer, sizeof(BD_VALUE));
-#if SIZE_MAX == 0xffffffffffffffffULL
- big_endian_values = HToBE64(big_endian_values);
-#else
- big_endian_values = HToBE32(big_endian_values);
-#endif
- nv = big_endian_values >> (BD_VALUE_SIZE - bits);
- count += bits;
- buffer += (bits >> 3);
- value = r->value | (nv << (shift & 0x7));
- } else {
- const int bits_over = (int)(shift + CHAR_BIT - (int)bits_left);
- int loop_end = 0;
- if (bits_over >= 0) {
- count += LOTS_OF_BITS;
- loop_end = bits_over;
- }
-
- if (bits_over < 0 || bits_left) {
- while (shift >= loop_end) {
- count += CHAR_BIT;
- value |= (BD_VALUE)*buffer++ << shift;
- shift -= CHAR_BIT;
- }
- }
- }
-
- // NOTE: Variable 'buffer' may not relate to 'r->buffer' after decryption,
- // so we increase 'r->buffer' by the amount that 'buffer' moved, rather than
- // assign 'buffer' to 'r->buffer'.
- r->buffer += buffer - buffer_start;
- r->value = value;
- r->count = count;
-}
-
-const uint8_t *vpx_reader_find_end(vpx_reader *r) {
- // Find the end of the coded buffer
- while (r->count > CHAR_BIT && r->count < BD_VALUE_SIZE) {
- r->count -= CHAR_BIT;
- r->buffer--;
- }
- return r->buffer;
-}