193a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org/* 293a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * Copyright (c) 2013 The WebM project authors. All Rights Reserved. 393a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * 493a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * Use of this source code is governed by a BSD-style license 593a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * that can be found in the LICENSE file in the root of the source 693a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * tree. An additional intellectual property rights grant can be found 793a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * in the file PATENTS. All contributing project authors may 893a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org * be found in the AUTHORS file in the root of the source tree. 993a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org */ 1093a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org 1193a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org#include "vp9/encoder/vp9_write_bit_buffer.h" 1293a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org 1393a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.orgsize_t vp9_rb_bytes_written(struct vp9_write_bit_buffer *wb) { 1493a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org return wb->bit_offset / CHAR_BIT + (wb->bit_offset % CHAR_BIT > 0); 1593a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org} 1693a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org 1793a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.orgvoid vp9_wb_write_bit(struct vp9_write_bit_buffer *wb, int bit) { 1893a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org const int off = (int)wb->bit_offset; 1993a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org const int p = off / CHAR_BIT; 2093a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org const int q = CHAR_BIT - 1 - off % CHAR_BIT; 2193a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org if (q == CHAR_BIT -1) { 2293a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org wb->bit_buffer[p] = bit << q; 2393a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org } else { 2493a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org wb->bit_buffer[p] &= ~(1 << q); 2593a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org wb->bit_buffer[p] |= bit << q; 2693a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org } 2793a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org wb->bit_offset = off + 1; 2893a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org} 2993a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org 3093a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.orgvoid vp9_wb_write_literal(struct vp9_write_bit_buffer *wb, int data, int bits) { 3193a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org int bit; 3293a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org for (bit = bits - 1; bit >= 0; bit--) 3393a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org vp9_wb_write_bit(wb, (data >> bit) & 1); 3493a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org} 35