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// Copyright 2020 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/capture/video/video_capture_buffer_tracker.h"
namespace media {
void VideoCaptureBufferTracker::SetHeldByProducer(bool new_held_by_producer) {
DCHECK_NE(held_by_producer_, new_held_by_producer);
// The producer can't take hold while a consumer still has hold.
if (new_held_by_producer)
DCHECK_EQ(consumer_hold_count_, 0);
held_by_producer_ = new_held_by_producer;
}
void VideoCaptureBufferTracker::AddConsumerHolds(int count) {
// New consumer holds may only be made while the producer hold is still on.
// This is because the buffer may disappear out from under us as soon as
// neither producer nor consumers have a hold on it.
DCHECK_EQ(consumer_hold_count_, 0);
DCHECK(held_by_producer_);
consumer_hold_count_ += count;
OnHeldByConsumersChanged(true);
}
void VideoCaptureBufferTracker::RemoveConsumerHolds(int count) {
DCHECK_GE(consumer_hold_count_, count);
consumer_hold_count_ -= count;
if (consumer_hold_count_ == 0) {
static uint64_t sequence_number = 0;
last_customer_use_sequence_number_ = ++sequence_number;
OnHeldByConsumersChanged(false);
}
}
bool VideoCaptureBufferTracker::IsSameGpuMemoryBuffer(
const gfx::GpuMemoryBufferHandle& handle) const {
return false;
}
void VideoCaptureBufferTracker::OnHeldByConsumersChanged(
bool is_held_by_consumers) {}
} // namespace media
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