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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/decoder_buffer_queue.h"
#include "base/logging.h"
#include "base/numerics/safe_conversions.h"
#include "media/base/buffers.h"
#include "media/base/decoder_buffer.h"
namespace media {
DecoderBufferQueue::DecoderBufferQueue()
: earliest_valid_timestamp_(kNoTimestamp()),
data_size_(0) {
}
DecoderBufferQueue::~DecoderBufferQueue() {}
void DecoderBufferQueue::Push(const scoped_refptr<DecoderBuffer>& buffer) {
CHECK(!buffer->end_of_stream());
queue_.push_back(buffer);
// TODO(damienv): Remove the cast here and in every place in this file
// when DecoderBuffer::data_size is modified to return a size_t.
data_size_ += base::checked_cast<size_t, int>(buffer->data_size());
// TODO(scherkus): FFmpeg returns some packets with no timestamp after
// seeking. Fix and turn this into CHECK(). See http://crbug.com/162192
if (buffer->timestamp() == kNoTimestamp()) {
DVLOG(1) << "Buffer has no timestamp";
return;
}
if (earliest_valid_timestamp_ == kNoTimestamp()) {
earliest_valid_timestamp_ = buffer->timestamp();
}
if (buffer->timestamp() < earliest_valid_timestamp_) {
DVLOG(1)
<< "Out of order timestamps: "
<< buffer->timestamp().InMicroseconds()
<< " vs. "
<< earliest_valid_timestamp_.InMicroseconds();
return;
}
earliest_valid_timestamp_ = buffer->timestamp();
in_order_queue_.push_back(buffer);
}
scoped_refptr<DecoderBuffer> DecoderBufferQueue::Pop() {
scoped_refptr<DecoderBuffer> buffer = queue_.front();
queue_.pop_front();
size_t buffer_data_size =
base::checked_cast<size_t, int>(buffer->data_size());
DCHECK_LE(buffer_data_size, data_size_);
data_size_ -= buffer_data_size;
if (!in_order_queue_.empty() &&
in_order_queue_.front().get() == buffer.get()) {
in_order_queue_.pop_front();
}
return buffer;
}
void DecoderBufferQueue::Clear() {
queue_.clear();
data_size_ = 0;
in_order_queue_.clear();
earliest_valid_timestamp_ = kNoTimestamp();
}
bool DecoderBufferQueue::IsEmpty() {
return queue_.empty();
}
base::TimeDelta DecoderBufferQueue::Duration() {
if (in_order_queue_.size() < 2)
return base::TimeDelta();
base::TimeDelta start = in_order_queue_.front()->timestamp();
base::TimeDelta end = in_order_queue_.back()->timestamp();
return end - start;
}
} // namespace media
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