media/base/audio_buffer_unittest.cc - Issue 261533002: Remove AudioBuffer::set_duration(), instead base on frames.

Unified Diff: media/base/audio_buffer_unittest.cc

Issue 261533002: Remove AudioBuffer::set_duration(), instead base on frames. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Fix divide by zero case. Created 6 years, 8 months ago

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Index: media/base/audio_buffer_unittest.cc

diff --git a/media/base/audio_buffer_unittest.cc b/media/base/audio_buffer_unittest.cc

index c40c076bd5e8ee73c224df4db6b972f0c00fea84..55ff4edcfe7dcdf6fb7bba84b5993ab848734fcd 100644

--- a/media/base/audio_buffer_unittest.cc

+++ b/media/base/audio_buffer_unittest.cc

@@ -2,8 +2,6 @@

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

-#include "base/strings/string_util.h"

-#include "base/strings/stringprintf.h"

#include "media/base/audio_buffer.h"

#include "media/base/audio_bus.h"

#include "media/base/test_helpers.h"

@@ -11,39 +9,44 @@

namespace media {

-const static int kSampleRate = 44100;

-static void VerifyResult(float* channel_data,

- int frames,

- float start,

- float increment) {

- for (int i = 0; i < frames; ++i) {

- SCOPED_TRACE(base::StringPrintf(

- "i=%d/%d start=%f, increment=%f", i, frames, start, increment));

- ASSERT_EQ(channel_data[i], start);

- start += increment;

+static const int kSampleRate = 48000;

+static void VerifyBus(AudioBus* bus, int frames, float start, float increment) {

+ for (int ch = 0; ch < bus->channels(); ++ch) {

+ const float v = start + ch * bus->frames() * increment;

+ for (int i = 0; i < frames; ++i) {

+ ASSERT_FLOAT_EQ(v + i * increment, bus->channel(ch)[i]) << "i=" << i

+ << ", ch=" << ch;

+ }

}

TEST(AudioBufferTest, CopyFrom) {

- const ChannelLayout channel_layout = CHANNEL_LAYOUT_MONO;

- const int frames = 8;

- const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

- scoped_refptr<AudioBuffer> buffer =

+ const ChannelLayout kChannelLayout = CHANNEL_LAYOUT_MONO;

+ scoped_refptr<AudioBuffer> original_buffer =

MakeAudioBuffer<uint8>(kSampleFormatU8,

- channel_layout,

- ChannelLayoutToChannelCount(channel_layout),

+ kChannelLayout,

+ ChannelLayoutToChannelCount(kChannelLayout),

kSampleRate,

- frames,

- start_time,

- duration);

- EXPECT_EQ(frames, buffer->frame_count());

- EXPECT_EQ(buffer->timestamp(), start_time);

- EXPECT_EQ(buffer->duration().InSeconds(), frames);

- EXPECT_FALSE(buffer->end_of_stream());

+ kSampleRate / 100,

+ base::TimeDelta());

+ scoped_refptr<AudioBuffer> new_buffer =

+ AudioBuffer::CopyFrom(kSampleFormatU8,

+ original_buffer->channel_layout(),

+ original_buffer->channel_count(),

+ original_buffer->sample_rate(),

+ original_buffer->frame_count(),

+ &original_buffer->channel_data()[0],

+ original_buffer->timestamp());

+ EXPECT_EQ(original_buffer->frame_count(), new_buffer->frame_count());

+ EXPECT_EQ(original_buffer->timestamp(), new_buffer->timestamp());

+ EXPECT_EQ(original_buffer->duration(), new_buffer->duration());

+ EXPECT_EQ(original_buffer->sample_rate(), new_buffer->sample_rate());

+ EXPECT_EQ(original_buffer->channel_count(), new_buffer->channel_count());

+ EXPECT_EQ(original_buffer->channel_layout(), new_buffer->channel_layout());

+ EXPECT_FALSE(original_buffer->end_of_stream());

}

TEST(AudioBufferTest, CreateEOSBuffer) {

@@ -55,8 +58,7 @@ TEST(AudioBufferTest, FrameSize) {

const uint8 kTestData[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,

15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,

27, 28, 29, 30, 31 };

- const base::TimeDelta kTimestampA = base::TimeDelta::FromMicroseconds(1337);

- const base::TimeDelta kTimestampB = base::TimeDelta::FromMicroseconds(1234);

+ const base::TimeDelta kTimestamp = base::TimeDelta::FromMicroseconds(1337);

const uint8* const data[] = { kTestData };

scoped_refptr<AudioBuffer> buffer =

@@ -66,8 +68,7 @@ TEST(AudioBufferTest, FrameSize) {

kSampleRate,

16,

data,

- kTimestampA,

- kTimestampB);

+ kTimestamp);

EXPECT_EQ(16, buffer->frame_count()); // 2 channels of 8-bit data

buffer = AudioBuffer::CopyFrom(kSampleFormatF32,

@@ -76,17 +77,15 @@ TEST(AudioBufferTest, FrameSize) {

kSampleRate,

data,

- kTimestampA,

- kTimestampB);

+ kTimestamp);

EXPECT_EQ(2, buffer->frame_count()); // now 4 channels of 32-bit data

}

TEST(AudioBufferTest, ReadU8) {

const ChannelLayout channel_layout = CHANNEL_LAYOUT_4_0;

const int channels = ChannelLayoutToChannelCount(channel_layout);

- const int frames = 4;

+ const int frames = 10;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer = MakeAudioBuffer<uint8>(kSampleFormatU8,

channel_layout,

channels,

@@ -94,19 +93,16 @@ TEST(AudioBufferTest, ReadU8) {

128,

frames,

- start_time,

- duration);

- // Read all 4 frames from the buffer. Data is interleaved, so ch[0] should be

- // 128, 132, 136, 140, other channels similar. However, values are converted

- // from [0, 255] to [-1.0, 1.0] with a bias of 128. Thus the first buffer

- // value should be 0.0, then 1/127, 2/127, etc.

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

+ start_time);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

buffer->ReadFrames(frames, 0, 0, bus.get());

- VerifyResult(bus->channel(0), frames, 0.0f, 4.0f / 127.0f);

- VerifyResult(bus->channel(1), frames, 1.0f / 127.0f, 4.0f / 127.0f);

- VerifyResult(bus->channel(2), frames, 2.0f / 127.0f, 4.0f / 127.0f);

- VerifyResult(bus->channel(3), frames, 3.0f / 127.0f, 4.0f / 127.0f);

+ VerifyBus(bus.get(), frames, 0, 1.0f / 127.0f);

+ // Now read the same data one frame at a time.

+ bus->Zero();

+ for (int i = 0; i < frames; ++i)

+ buffer->ReadFrames(1, i, i, bus.get());

+ VerifyBus(bus.get(), frames, 0, 1.0f / 127.0f);

}

TEST(AudioBufferTest, ReadS16) {

@@ -114,7 +110,6 @@ TEST(AudioBufferTest, ReadS16) {

const int channels = ChannelLayoutToChannelCount(channel_layout);

const int frames = 10;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer = MakeAudioBuffer<int16>(kSampleFormatS16,

channel_layout,

channels,

@@ -122,32 +117,23 @@ TEST(AudioBufferTest, ReadS16) {

frames,

- start_time,

- duration);

- // Read 6 frames from the buffer. Data is interleaved, so ch[0] should be 1,

- // 3, 5, 7, 9, 11, and ch[1] should be 2, 4, 6, 8, 10, 12. Data is converted

- // to float from -1.0 to 1.0 based on int16 range.

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

- buffer->ReadFrames(6, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 6, 1.0f / kint16max, 2.0f / kint16max);

- VerifyResult(bus->channel(1), 6, 2.0f / kint16max, 2.0f / kint16max);

+ start_time);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

+ buffer->ReadFrames(frames, 0, 0, bus.get());

+ VerifyBus(bus.get(), frames, 1.0f / kint16max, 1.0f / kint16max);

// Now read the same data one frame at a time.

- bus = AudioBus::Create(channels, 100);

- for (int i = 0; i < frames; ++i) {

+ bus->Zero();

+ for (int i = 0; i < frames; ++i)

buffer->ReadFrames(1, i, i, bus.get());

- }

- VerifyResult(bus->channel(0), frames, 1.0f / kint16max, 2.0f / kint16max);

- VerifyResult(bus->channel(1), frames, 2.0f / kint16max, 2.0f / kint16max);

+ VerifyBus(bus.get(), frames, 1.0f / kint16max, 1.0f / kint16max);

}

TEST(AudioBufferTest, ReadS32) {

const ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;

const int channels = ChannelLayoutToChannelCount(channel_layout);

- const int frames = 6;

+ const int frames = 20;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer = MakeAudioBuffer<int32>(kSampleFormatS32,

channel_layout,

channels,

@@ -155,22 +141,15 @@ TEST(AudioBufferTest, ReadS32) {

frames,

- start_time,

- duration);

- // Read 6 frames from the buffer. Data is interleaved, so ch[0] should be 1,

- // 3, 5, 7, 9, 11, and ch[1] should be 2, 4, 6, 8, 10, 12. Data is converted

- // to float from -1.0 to 1.0 based on int32 range.

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

+ start_time);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

buffer->ReadFrames(frames, 0, 0, bus.get());

- VerifyResult(bus->channel(0), frames, 1.0f / kint32max, 2.0f / kint32max);

- VerifyResult(bus->channel(1), frames, 2.0f / kint32max, 2.0f / kint32max);

- // Now read 2 frames starting at frame offset 3. ch[0] should be 7, 9, and

- // ch[1] should be 8, 10.

- buffer->ReadFrames(2, 3, 0, bus.get());

- VerifyResult(bus->channel(0), 2, 7.0f / kint32max, 2.0f / kint32max);

- VerifyResult(bus->channel(1), 2, 8.0f / kint32max, 2.0f / kint32max);

+ VerifyBus(bus.get(), frames, 1.0f / kint32max, 1.0f / kint32max);

+ // Read second 10 frames.

+ bus->Zero();

+ buffer->ReadFrames(10, 10, 0, bus.get());

+ VerifyBus(bus.get(), 10, 11.0f / kint32max, 1.0f / kint32max);

}

TEST(AudioBufferTest, ReadF32) {

@@ -178,7 +157,6 @@ TEST(AudioBufferTest, ReadF32) {

const int channels = ChannelLayoutToChannelCount(channel_layout);

const int frames = 20;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer = MakeAudioBuffer<float>(kSampleFormatF32,

channel_layout,

channels,

@@ -186,21 +164,15 @@ TEST(AudioBufferTest, ReadF32) {

1.0f,

frames,

- start_time,

- duration);

- // Read first 10 frames from the buffer. F32 is interleaved, so ch[0] should

- // be 1, 3, 5, ... and ch[1] should be 2, 4, 6, ...

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

+ start_time);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

buffer->ReadFrames(10, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 10, 1.0f, 2.0f);

- VerifyResult(bus->channel(1), 10, 2.0f, 2.0f);

+ VerifyBus(bus.get(), 10, 1, 1);

// Read second 10 frames.

- bus = AudioBus::Create(channels, 100);

+ bus->Zero();

buffer->ReadFrames(10, 10, 0, bus.get());

- VerifyResult(bus->channel(0), 10, 21.0f, 2.0f);

- VerifyResult(bus->channel(1), 10, 22.0f, 2.0f);

+ VerifyBus(bus.get(), 10, 11, 1);

}

TEST(AudioBufferTest, ReadS16Planar) {

@@ -208,7 +180,6 @@ TEST(AudioBufferTest, ReadS16Planar) {

const int channels = ChannelLayoutToChannelCount(channel_layout);

const int frames = 20;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer =

MakeAudioBuffer<int16>(kSampleFormatPlanarS16,

channel_layout,

@@ -217,32 +188,25 @@ TEST(AudioBufferTest, ReadS16Planar) {

frames,

- start_time,

- duration);

- // Read 6 frames from the buffer. Data is planar, so ch[0] should be 1, 2, 3,

- // 4, 5, 6, and ch[1] should be 21, 22, 23, 24, 25, 26. Data is converted to

- // float from -1.0 to 1.0 based on int16 range.

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

- buffer->ReadFrames(6, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 6, 1.0f / kint16max, 1.0f / kint16max);

- VerifyResult(bus->channel(1), 6, 21.0f / kint16max, 1.0f / kint16max);

+ start_time);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

+ buffer->ReadFrames(10, 0, 0, bus.get());

+ VerifyBus(bus.get(), 10, 1.0f / kint16max, 1.0f / kint16max);

// Read all the frames backwards, one by one. ch[0] should be 20, 19, ...

- bus = AudioBus::Create(channels, 100);

- for (int i = 0; i < frames; ++i) {

- buffer->ReadFrames(1, frames - i - 1, i, bus.get());

- }

- VerifyResult(bus->channel(0), frames, 20.0f / kint16max, -1.0f / kint16max);

- VerifyResult(bus->channel(1), frames, 40.0f / kint16max, -1.0f / kint16max);

+ bus->Zero();

+ for (int i = frames - 1; i >= 0; --i)

+ buffer->ReadFrames(1, i, i, bus.get());

+ VerifyBus(bus.get(), frames, 1.0f / kint16max, 1.0f / kint16max);

// Read 0 frames with different offsets. Existing data in AudioBus should be

// unchanged.

buffer->ReadFrames(0, 0, 0, bus.get());

+ VerifyBus(bus.get(), frames, 1.0f / kint16max, 1.0f / kint16max);

buffer->ReadFrames(0, 0, 10, bus.get());

+ VerifyBus(bus.get(), frames, 1.0f / kint16max, 1.0f / kint16max);

buffer->ReadFrames(0, 10, 0, bus.get());

- VerifyResult(bus->channel(0), frames, 20.0f / kint16max, -1.0f / kint16max);

- VerifyResult(bus->channel(1), frames, 40.0f / kint16max, -1.0f / kint16max);

+ VerifyBus(bus.get(), frames, 1.0f / kint16max, 1.0f / kint16max);

}

TEST(AudioBufferTest, ReadF32Planar) {

@@ -250,7 +214,6 @@ TEST(AudioBufferTest, ReadF32Planar) {

const int channels = ChannelLayoutToChannelCount(channel_layout);

const int frames = 100;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer =

MakeAudioBuffer<float>(kSampleFormatPlanarF32,

channel_layout,

@@ -259,103 +222,94 @@ TEST(AudioBufferTest, ReadF32Planar) {

1.0f,

frames,

- start_time,

- duration);

+ start_time);

// Read all 100 frames from the buffer. F32 is planar, so ch[0] should be 1,

// 2, 3, 4, ..., ch[1] should be 101, 102, 103, ..., and so on for all 4

// channels.

scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

buffer->ReadFrames(frames, 0, 0, bus.get());

- VerifyResult(bus->channel(0), frames, 1.0f, 1.0f);

- VerifyResult(bus->channel(1), frames, 101.0f, 1.0f);

- VerifyResult(bus->channel(2), frames, 201.0f, 1.0f);

- VerifyResult(bus->channel(3), frames, 301.0f, 1.0f);

+ VerifyBus(bus.get(), frames, 1, 1);

// Now read 20 frames from the middle of the buffer.

- bus = AudioBus::Create(channels, 100);

+ bus->Zero();

buffer->ReadFrames(20, 50, 0, bus.get());

- VerifyResult(bus->channel(0), 20, 51.0f, 1.0f);

- VerifyResult(bus->channel(1), 20, 151.0f, 1.0f);

- VerifyResult(bus->channel(2), 20, 251.0f, 1.0f);

- VerifyResult(bus->channel(3), 20, 351.0f, 1.0f);

+ VerifyBus(bus.get(), 20, 51, 1);

}

TEST(AudioBufferTest, EmptyBuffer) {

const ChannelLayout channel_layout = CHANNEL_LAYOUT_4_0;

const int channels = ChannelLayoutToChannelCount(channel_layout);

- const int frames = 100;

+ const int frames = kSampleRate / 100;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

scoped_refptr<AudioBuffer> buffer = AudioBuffer::CreateEmptyBuffer(

- channel_layout, channels, kSampleRate, frames, start_time, duration);

+ channel_layout, channels, kSampleRate, frames, start_time);

EXPECT_EQ(frames, buffer->frame_count());

EXPECT_EQ(start_time, buffer->timestamp());

- EXPECT_EQ(frames, buffer->duration().InSeconds());

+ EXPECT_EQ(base::TimeDelta::FromMilliseconds(10), buffer->duration());

EXPECT_FALSE(buffer->end_of_stream());

// Read all 100 frames from the buffer. All data should be 0.

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

buffer->ReadFrames(frames, 0, 0, bus.get());

- VerifyResult(bus->channel(0), frames, 0.0f, 0.0f);

- VerifyResult(bus->channel(1), frames, 0.0f, 0.0f);

- VerifyResult(bus->channel(2), frames, 0.0f, 0.0f);

- VerifyResult(bus->channel(3), frames, 0.0f, 0.0f);

+ VerifyBus(bus.get(), frames, 0, 0);

}

TEST(AudioBufferTest, Trim) {

const ChannelLayout channel_layout = CHANNEL_LAYOUT_4_0;

const int channels = ChannelLayoutToChannelCount(channel_layout);

- const int frames = 100;

+ const int frames = kSampleRate / 10;

const base::TimeDelta start_time;

- const base::TimeDelta duration = base::TimeDelta::FromSeconds(frames);

+ const base::TimeDelta duration = base::TimeDelta::FromMilliseconds(100);

scoped_refptr<AudioBuffer> buffer =

MakeAudioBuffer<float>(kSampleFormatPlanarF32,

channel_layout,

channels,

kSampleRate,

- 1.0f,

+ 0.0f,

1.0f,

frames,

- start_time,

- duration);

+ start_time);

EXPECT_EQ(frames, buffer->frame_count());

EXPECT_EQ(start_time, buffer->timestamp());

- EXPECT_EQ(frames, buffer->duration().InSeconds());

- scoped_ptr<AudioBus> bus = AudioBus::Create(channels, 100);

- buffer->ReadFrames(20, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 20, 1.0f, 1.0f);

- // Trim off 10 frames from the start.

- buffer->TrimStart(10);

- EXPECT_EQ(buffer->frame_count(), frames - 10);

- EXPECT_EQ(buffer->timestamp(), start_time + base::TimeDelta::FromSeconds(10));

- EXPECT_EQ(buffer->duration(), base::TimeDelta::FromSeconds(90));

- buffer->ReadFrames(20, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 20, 11.0f, 1.0f);

- // Trim off 10 frames from the end.

- buffer->TrimEnd(10);

- EXPECT_EQ(buffer->frame_count(), frames - 20);

- EXPECT_EQ(buffer->timestamp(), start_time + base::TimeDelta::FromSeconds(10));

- EXPECT_EQ(buffer->duration(), base::TimeDelta::FromSeconds(80));

- buffer->ReadFrames(20, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 20, 11.0f, 1.0f);

- // Trim off 50 more from the start.

- buffer->TrimStart(50);

- EXPECT_EQ(buffer->frame_count(), frames - 70);

- EXPECT_EQ(buffer->timestamp(), start_time + base::TimeDelta::FromSeconds(60));

- EXPECT_EQ(buffer->duration(), base::TimeDelta::FromSeconds(30));

- buffer->ReadFrames(10, 0, 0, bus.get());

- VerifyResult(bus->channel(0), 10, 61.0f, 1.0f);

- // Trim off the last 30 frames.

- buffer->TrimEnd(30);

- EXPECT_EQ(buffer->frame_count(), 0);

- EXPECT_EQ(buffer->timestamp(), start_time + base::TimeDelta::FromSeconds(60));

- EXPECT_EQ(buffer->duration(), base::TimeDelta::FromSeconds(0));

+ EXPECT_EQ(duration, buffer->duration());

+ const int ten_ms_of_frames = kSampleRate / 100;

+ const base::TimeDelta ten_ms = base::TimeDelta::FromMilliseconds(10);

+ scoped_ptr<AudioBus> bus = AudioBus::Create(channels, frames);

+ buffer->ReadFrames(buffer->frame_count(), 0, 0, bus.get());

+ VerifyBus(bus.get(), buffer->frame_count(), 0.0f, 1.0f);

+ // Trim off 10ms of frames from the start.

+ buffer->TrimStart(ten_ms_of_frames);

+ EXPECT_EQ(start_time + ten_ms, buffer->timestamp());

+ EXPECT_EQ(frames - ten_ms_of_frames, buffer->frame_count());

+ EXPECT_EQ(duration - ten_ms, buffer->duration());

+ buffer->ReadFrames(buffer->frame_count(), 0, 0, bus.get());

+ VerifyBus(bus.get(), buffer->frame_count(), ten_ms_of_frames, 1.0f);

+ // Trim off 10ms of frames from the end.

+ buffer->TrimEnd(ten_ms_of_frames);

+ EXPECT_EQ(start_time + ten_ms, buffer->timestamp());

+ EXPECT_EQ(frames - 2 * ten_ms_of_frames, buffer->frame_count());

+ EXPECT_EQ(duration - 2 * ten_ms, buffer->duration());

+ buffer->ReadFrames(buffer->frame_count(), 0, 0, bus.get());

+ VerifyBus(bus.get(), buffer->frame_count(), ten_ms_of_frames, 1.0f);

+ // Trim off 40ms more from the start.

+ buffer->TrimStart(4 * ten_ms_of_frames);

+ EXPECT_EQ(start_time + 5 * ten_ms, buffer->timestamp());

+ EXPECT_EQ(frames - 6 * ten_ms_of_frames, buffer->frame_count());

+ EXPECT_EQ(duration - 6 * ten_ms, buffer->duration());

+ buffer->ReadFrames(buffer->frame_count(), 0, 0, bus.get());

+ VerifyBus(bus.get(), buffer->frame_count(), 5 * ten_ms_of_frames, 1.0f);

+ // Trim off the final 40ms from the end.

+ buffer->TrimEnd(4 * ten_ms_of_frames);

+ EXPECT_EQ(0, buffer->frame_count());

+ EXPECT_EQ(start_time + 5 * ten_ms, buffer->timestamp());

+ EXPECT_EQ(base::TimeDelta(), buffer->duration());

}

} // namespace media

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