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// Copyright (c) 2013 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.
// Unit test for VideoCaptureBufferPool.
#include "content/browser/renderer_host/media/video_capture_buffer_pool.h"
#include "base/bind.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "content/browser/renderer_host/media/video_capture_controller.h"
#include "media/base/video_frame.h"
#include "media/base/video_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
TEST(VideoCaptureBufferPoolTest, BufferPool) {
const gfx::Size size = gfx::Size(640, 480);
scoped_refptr<media::VideoFrame> non_pool_frame =
media::VideoFrame::CreateFrame(media::VideoFrame::YV12, size,
gfx::Rect(size), size, base::TimeDelta());
scoped_refptr<VideoCaptureBufferPool> pool = new VideoCaptureBufferPool(
media::VideoFrame::AllocationSize(media::VideoFrame::I420, size), 3);
ASSERT_EQ(460800u, pool->GetMemorySize());
ASSERT_TRUE(pool->Allocate());
scoped_refptr<media::VideoFrame> frame1 =
pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame1.get());
ASSERT_EQ(size, frame1->coded_size());
scoped_refptr<media::VideoFrame> frame2 =
pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame2.get());
ASSERT_EQ(size, frame2->coded_size());
scoped_refptr<media::VideoFrame> frame3 =
pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame3.get());
// Touch the memory.
media::FillYUV(frame1.get(), 0x11, 0x22, 0x33);
media::FillYUV(frame2.get(), 0x44, 0x55, 0x66);
media::FillYUV(frame3.get(), 0x77, 0x88, 0x99);
// Fourth frame should fail.
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
// Release 1st frame and retry; this should succeed.
frame1 = NULL;
scoped_refptr<media::VideoFrame> frame4 =
pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame4.get());
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
// Validate the IDs
int buffer_id2 =
pool->RecognizeReservedBuffer(frame2->shared_memory_handle());
ASSERT_LE(0, buffer_id2);
int buffer_id3 =
pool->RecognizeReservedBuffer(frame3->shared_memory_handle());
ASSERT_LE(0, buffer_id3);
int buffer_id4 =
pool->RecognizeReservedBuffer(frame4->shared_memory_handle());
ASSERT_LE(0, buffer_id4);
int buffer_id_non_pool =
pool->RecognizeReservedBuffer(non_pool_frame->shared_memory_handle());
ASSERT_GT(0, buffer_id_non_pool);
ASSERT_FALSE(pool->IsAnyBufferHeldForConsumers());
// Deliver a frame.
pool->HoldForConsumers(buffer_id3, 2);
ASSERT_TRUE(pool->IsAnyBufferHeldForConsumers());
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
frame3 = NULL; // Old producer releases frame. Should be a noop.
ASSERT_TRUE(pool->IsAnyBufferHeldForConsumers());
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
frame2 = NULL; // Active producer releases frame. Should free a frame.
buffer_id2 = 0;
ASSERT_TRUE(pool->IsAnyBufferHeldForConsumers());
frame1 = pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame1.get());
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
ASSERT_TRUE(pool->IsAnyBufferHeldForConsumers());
// First consumer finishes.
pool->RelinquishConsumerHold(buffer_id3, 1);
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
ASSERT_TRUE(pool->IsAnyBufferHeldForConsumers());
// Second consumer finishes. This should free that frame.
pool->RelinquishConsumerHold(buffer_id3, 1);
ASSERT_FALSE(pool->IsAnyBufferHeldForConsumers());
frame3 = pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame3.get());
ASSERT_FALSE(pool->IsAnyBufferHeldForConsumers());
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
// Now deliver & consume frame1, but don't release the VideoFrame.
int buffer_id1 =
pool->RecognizeReservedBuffer(frame1->shared_memory_handle());
ASSERT_LE(0, buffer_id1);
pool->HoldForConsumers(buffer_id1, 5);
ASSERT_TRUE(pool->IsAnyBufferHeldForConsumers());
pool->RelinquishConsumerHold(buffer_id1, 5);
ASSERT_FALSE(pool->IsAnyBufferHeldForConsumers());
// Even though the consumer is done with the buffer at |buffer_id1|, it cannot
// be re-allocated to the producer, because |frame1| still references it. But
// when |frame1| goes away, we should be able to re-reserve the buffer (and
// the ID ought to be the same).
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
frame1 = NULL; // Should free the frame.
frame2 = pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame2.get());
ASSERT_EQ(buffer_id1,
pool->RecognizeReservedBuffer(frame2->shared_memory_handle()));
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
// For good measure, do one more cycle of free/realloc without delivery, now
// that this buffer has been through the consumer-hold cycle.
frame2 = NULL;
frame1 = pool->ReserveI420VideoFrame(size, 0);
ASSERT_TRUE(NULL != frame1.get());
ASSERT_EQ(buffer_id1,
pool->RecognizeReservedBuffer(frame1->shared_memory_handle()));
ASSERT_EQ(NULL, pool->ReserveI420VideoFrame(size, 0).get())
<< "Pool should be empty";
// Tear down the pool, writing into the frames. The VideoFrame should
// preserve the lifetime of the underlying memory.
frame3 = NULL;
pool = NULL;
// Touch the memory.
media::FillYUV(frame1.get(), 0x11, 0x22, 0x33);
media::FillYUV(frame4.get(), 0x44, 0x55, 0x66);
frame1 = NULL;
media::FillYUV(frame4.get(), 0x44, 0x55, 0x66);
frame4 = NULL;
}
} // namespace content
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