67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "packager/media/base/offset_byte_queue.h"
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#include <stdint.h>
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#include "packager/base/logging.h"
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namespace shaka {
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namespace media {
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OffsetByteQueue::OffsetByteQueue() : buf_(NULL), size_(0), head_(0) {}
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OffsetByteQueue::~OffsetByteQueue() {}
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void OffsetByteQueue::Reset() {
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queue_.Reset();
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buf_ = NULL;
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size_ = 0;
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head_ = 0;
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}
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void OffsetByteQueue::Push(const uint8_t* buf, int size) {
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queue_.Push(buf, size);
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Sync();
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DVLOG(4) << "Buffer pushed. head=" << head() << " tail=" << tail();
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}
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void OffsetByteQueue::Peek(const uint8_t** buf, int* size) {
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*buf = size_ > 0 ? buf_ : NULL;
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*size = size_;
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}
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void OffsetByteQueue::Pop(int count) {
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queue_.Pop(count);
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head_ += count;
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Sync();
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}
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void OffsetByteQueue::PeekAt(int64_t offset, const uint8_t** buf, int* size) {
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if (offset < head() || offset >= tail()) {
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*buf = NULL;
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*size = 0;
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return;
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}
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*buf = &buf_[offset - head()];
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*size = tail() - offset;
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}
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bool OffsetByteQueue::Trim(int64_t max_offset) {
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if (max_offset < head_) return true;
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if (max_offset > tail()) {
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Pop(size_);
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return false;
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}
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Pop(max_offset - head_);
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return true;
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}
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void OffsetByteQueue::Sync() {
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queue_.Peek(&buf_, &size_);
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}
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} // namespace media
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} // namespace shaka
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