1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "media/mp4/offset_byte_queue.h"
7 #include "base/basictypes.h"
8 #include "base/logging.h"
12 OffsetByteQueue::OffsetByteQueue() : buf_(NULL), size_(0), head_(0) {}
13 OffsetByteQueue::~OffsetByteQueue() {}
15 void OffsetByteQueue::Reset() {
22 void OffsetByteQueue::Push(const uint8* buf, int size) {
23 queue_.Push(buf, size);
25 DVLOG(4) << "Buffer pushed. head=" << head() << " tail=" << tail();
28 void OffsetByteQueue::Peek(const uint8** buf, int* size) {
29 *buf = size_ > 0 ? buf_ : NULL;
33 void OffsetByteQueue::Pop(int count) {
39 void OffsetByteQueue::PeekAt(int64 offset, const uint8** buf, int* size) {
40 DCHECK(offset >= head());
41 if (offset < head() || offset >= tail()) {
46 *buf = &buf_[offset - head()];
47 *size = tail() - offset;
50 bool OffsetByteQueue::Trim(int64 max_offset) {
51 if (max_offset < head_) return true;
52 if (max_offset > tail()) {
56 Pop(max_offset - head_);
60 void OffsetByteQueue::Sync() {
61 queue_.Peek(&buf_, &size_);