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Merge "vp9_read_bit_buffer.h convert header statics to global functions"

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This commit is contained in:
Jim Bankoski
2014-03-10 07:36:24 -07:00
committed by Gerrit Code Review
parent 622f06eb59 a1fbe1e15f
commit 04e7607bd0
3 changed files with 46 additions and 27 deletions
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41
vp9/decoder/vp9_read_bit_buffer.c Normal file
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@@ -0,0 +1,41 @@
/*
* 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/decoder/vp9_read_bit_buffer.h"
size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb) {
return rb->bit_offset / CHAR_BIT + (rb->bit_offset % CHAR_BIT > 0);
}
int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb) {
const size_t off = rb->bit_offset;
const size_t p = off / CHAR_BIT;
const int q = CHAR_BIT - 1 - (int)off % CHAR_BIT;
if (rb->bit_buffer + p >= rb->bit_buffer_end) {
rb->error_handler(rb->error_handler_data);
return 0;
} else {
const int bit = (rb->bit_buffer[p] & (1 << q)) >> q;
rb->bit_offset = off + 1;
return bit;
}
}
int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits) {
int value = 0, bit;
for (bit = bits - 1; bit >= 0; bit--)
value |= vp9_rb_read_bit(rb) << bit;
return value;
}
int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb,
int bits) {
const int value = vp9_rb_read_literal(rb, bits);
return vp9_rb_read_bit(rb) ? -value : value;
}

31
vp9/decoder/vp9_read_bit_buffer.h
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@@ -30,36 +30,13 @@ struct vp9_read_bit_buffer {
vp9_rb_error_handler error_handler;
};
static size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb) {
return rb->bit_offset / CHAR_BIT + (rb->bit_offset % CHAR_BIT > 0);
}
size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb);
static int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb) {
const size_t off = rb->bit_offset;
const size_t p = off / CHAR_BIT;
const int q = CHAR_BIT - 1 - (int)off % CHAR_BIT;
if (rb->bit_buffer + p >= rb->bit_buffer_end) {
rb->error_handler(rb->error_handler_data);
return 0;
} else {
const int bit = (rb->bit_buffer[p] & (1 << q)) >> q;
rb->bit_offset = off + 1;
return bit;
}
}
int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb);
static int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits) {
int value = 0, bit;
for (bit = bits - 1; bit >= 0; bit--)
value |= vp9_rb_read_bit(rb) << bit;
return value;
}
int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits);
static int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb,
int bits) {
const int value = vp9_rb_read_literal(rb, bits);
return vp9_rb_read_bit(rb) ? -value : value;
}
int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb, int bits);
#ifdef __cplusplus
} // extern "C"

1
vp9/vp9dx.mk
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@@ -25,6 +25,7 @@ VP9_DX_SRCS-yes += decoder/vp9_dthread.c
VP9_DX_SRCS-yes += decoder/vp9_dthread.h
VP9_DX_SRCS-yes += decoder/vp9_reader.h
VP9_DX_SRCS-yes += decoder/vp9_reader.c
VP9_DX_SRCS-yes += decoder/vp9_read_bit_buffer.c
VP9_DX_SRCS-yes += decoder/vp9_read_bit_buffer.h
VP9_DX_SRCS-yes += decoder/vp9_decodemv.h
VP9_DX_SRCS-yes += decoder/vp9_detokenize.h