Index: source/libvpx/vp9/encoder/vp9_write_bit_buffer.c |
=================================================================== |
--- source/libvpx/vp9/encoder/vp9_write_bit_buffer.c (revision 0) |
+++ source/libvpx/vp9/encoder/vp9_write_bit_buffer.c (revision 0) |
@@ -0,0 +1,34 @@ |
+/* |
+ * Copyright (c) 2013 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 "vp9/encoder/vp9_write_bit_buffer.h" |
+ |
+size_t vp9_rb_bytes_written(struct vp9_write_bit_buffer *wb) { |
+ return wb->bit_offset / CHAR_BIT + (wb->bit_offset % CHAR_BIT > 0); |
+} |
+ |
+void vp9_wb_write_bit(struct vp9_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) { |
+ 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 vp9_wb_write_literal(struct vp9_write_bit_buffer *wb, int data, int bits) { |
+ int bit; |
+ for (bit = bits - 1; bit >= 0; bit--) |
+ vp9_wb_write_bit(wb, (data >> bit) & 1); |
+} |