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author | Matt A. Tobin <email@mattatobin.com> | 2020-04-07 23:30:51 -0400 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2020-04-14 13:26:42 +0200 |
commit | 277f2116b6660e9bbe7f5d67524be57eceb49b8b (patch) | |
tree | 4595f7cc71418f71b9a97dfaeb03a30aa60f336a /third_party/aom/aom_dsp/bitwriter_buffer.c | |
parent | d270404436f6e84ffa3b92af537ac721bf10d66e (diff) | |
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Move aom source to a sub-directory under media/libaom
There is no damned reason to treat this differently than any other media lib given its license and there never was.
Diffstat (limited to 'third_party/aom/aom_dsp/bitwriter_buffer.c')
-rw-r--r-- | third_party/aom/aom_dsp/bitwriter_buffer.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/third_party/aom/aom_dsp/bitwriter_buffer.c b/third_party/aom/aom_dsp/bitwriter_buffer.c deleted file mode 100644 index 596246deb..000000000 --- a/third_party/aom/aom_dsp/bitwriter_buffer.c +++ /dev/null @@ -1,87 +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. - */ - -#include <assert.h> -#include <limits.h> -#include <stdlib.h> - -#include "config/aom_config.h" - -#include "aom_dsp/bitwriter_buffer.h" - -int aom_wb_is_byte_aligned(const struct aom_write_bit_buffer *wb) { - return (wb->bit_offset % CHAR_BIT == 0); -} - -uint32_t aom_wb_bytes_written(const struct aom_write_bit_buffer *wb) { - return wb->bit_offset / CHAR_BIT + (wb->bit_offset % CHAR_BIT > 0); -} - -void aom_wb_write_bit(struct aom_write_bit_buffer *wb, int bit) { - const int off = (int)wb->bit_offset; - const int p = off / CHAR_BIT; - const int q = CHAR_BIT - 1 - off % CHAR_BIT; - if (q == CHAR_BIT - 1) { - // Zero next char and write bit - wb->bit_buffer[p] = bit << q; - } else { - wb->bit_buffer[p] &= ~(1 << q); - wb->bit_buffer[p] |= bit << q; - } - wb->bit_offset = off + 1; -} - -void aom_wb_overwrite_bit(struct aom_write_bit_buffer *wb, int bit) { - // Do not zero bytes but overwrite exisiting values - const int off = (int)wb->bit_offset; - const int p = off / CHAR_BIT; - const int q = CHAR_BIT - 1 - off % CHAR_BIT; - wb->bit_buffer[p] &= ~(1 << q); - wb->bit_buffer[p] |= bit << q; - wb->bit_offset = off + 1; -} - -void aom_wb_write_literal(struct aom_write_bit_buffer *wb, int data, int bits) { - assert(bits <= 31); - int bit; - for (bit = bits - 1; bit >= 0; bit--) aom_wb_write_bit(wb, (data >> bit) & 1); -} - -void aom_wb_write_unsigned_literal(struct aom_write_bit_buffer *wb, - uint32_t data, int bits) { - assert(bits <= 32); - int bit; - for (bit = bits - 1; bit >= 0; bit--) aom_wb_write_bit(wb, (data >> bit) & 1); -} - -void aom_wb_overwrite_literal(struct aom_write_bit_buffer *wb, int data, - int bits) { - int bit; - for (bit = bits - 1; bit >= 0; bit--) - aom_wb_overwrite_bit(wb, (data >> bit) & 1); -} - -void aom_wb_write_inv_signed_literal(struct aom_write_bit_buffer *wb, int data, - int bits) { - aom_wb_write_literal(wb, data, bits + 1); -} - -void aom_wb_write_uvlc(struct aom_write_bit_buffer *wb, uint32_t v) { - int64_t shift_val = ++v; - int leading_zeroes = 1; - - assert(shift_val > 0); - - while (shift_val >>= 1) leading_zeroes += 2; - - aom_wb_write_literal(wb, 0, leading_zeroes >> 1); - aom_wb_write_unsigned_literal(wb, v, (leading_zeroes + 1) >> 1); -} |