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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
|
/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "gtest/gtest.h"
#include "vpx/vpx_encoder.h"
#include "vpx/vp8cx.h"
#include "webrtc/modules/video_coding/codecs/interface/video_codec_interface.h"
#include "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h"
#include "webrtc/modules/video_coding/utility/include/mock/mock_frame_dropper.h"
#include "webrtc/system_wrappers/interface/scoped_ptr.h"
using ::testing::_;
using ::testing::NiceMock;
using ::testing::Return;
namespace webrtc {
enum { kTimestampDelta5Fps = 90000 / 5 }; // 5 frames per second at 90 kHz.
enum { kTimestampDelta30Fps = 90000 / 30 }; // 30 frames per second at 90 kHz.
enum { kFrameSize = 2500 };
const int kFlagsTL0 = VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF;
const int kFlagsTL1 = VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_ARF |
VP8_EFLAG_NO_UPD_LAST;
const int kFlagsTL1Sync = VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_REF_GF |
VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_UPD_LAST;
class ScreenshareLayersFT : public ScreenshareLayers {
public:
ScreenshareLayersFT(int num_temporal_layers,
uint8_t initial_tl0_pic_idx,
FrameDropper* tl0_frame_dropper,
FrameDropper* tl1_frame_dropper)
: ScreenshareLayers(num_temporal_layers,
initial_tl0_pic_idx,
tl0_frame_dropper,
tl1_frame_dropper) {}
virtual ~ScreenshareLayersFT() {}
protected:
virtual bool TargetBitrateExperimentEnabled() OVERRIDE { return true; }
};
class ScreenshareLayerTest : public ::testing::Test {
protected:
void SetEncodeExpectations(bool drop_tl0, bool drop_tl1, int framerate) {
EXPECT_CALL(tl0_frame_dropper_, DropFrame())
.Times(1)
.WillRepeatedly(Return(drop_tl0));
if (drop_tl0) {
EXPECT_CALL(tl1_frame_dropper_, DropFrame())
.Times(1)
.WillRepeatedly(Return(drop_tl1));
}
EXPECT_CALL(tl0_frame_dropper_, Leak(framerate))
.Times(1);
EXPECT_CALL(tl1_frame_dropper_, Leak(framerate))
.Times(1);
if (drop_tl0) {
EXPECT_CALL(tl0_frame_dropper_, Fill(_, _))
.Times(0);
if (drop_tl1) {
EXPECT_CALL(tl1_frame_dropper_, Fill(_, _))
.Times(0);
} else {
EXPECT_CALL(tl1_frame_dropper_, Fill(kFrameSize, true))
.Times(1);
}
} else {
EXPECT_CALL(tl0_frame_dropper_, Fill(kFrameSize, true))
.Times(1);
EXPECT_CALL(tl1_frame_dropper_, Fill(kFrameSize, true))
.Times(1);
}
}
void EncodeFrame(uint32_t timestamp,
bool base_sync,
CodecSpecificInfoVP8* vp8_info,
int* flags) {
*flags = layers_->EncodeFlags(timestamp);
layers_->PopulateCodecSpecific(base_sync, vp8_info, timestamp);
layers_->FrameEncoded(kFrameSize, timestamp);
}
NiceMock<MockFrameDropper> tl0_frame_dropper_;
NiceMock<MockFrameDropper> tl1_frame_dropper_;
scoped_ptr<ScreenshareLayersFT> layers_;
};
TEST_F(ScreenshareLayerTest, 1Layer) {
layers_.reset(
new ScreenshareLayersFT(1, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
EXPECT_TRUE(layers_->ConfigureBitrates(100, 1000, 5, NULL));
int flags = 0;
uint32_t timestamp = 0;
CodecSpecificInfoVP8 vp8_info;
// One layer screenshare should not use the frame dropper as all frames will
// belong to the base layer.
EXPECT_CALL(tl0_frame_dropper_, DropFrame())
.Times(0);
EXPECT_CALL(tl1_frame_dropper_, DropFrame())
.Times(0);
flags = layers_->EncodeFlags(timestamp);
EXPECT_EQ(0, flags);
layers_->PopulateCodecSpecific(false, &vp8_info, timestamp);
EXPECT_EQ(static_cast<uint8_t>(kNoTemporalIdx), vp8_info.temporalIdx);
EXPECT_FALSE(vp8_info.layerSync);
EXPECT_EQ(kNoTl0PicIdx, vp8_info.tl0PicIdx);
layers_->FrameEncoded(kFrameSize, timestamp);
EXPECT_CALL(tl0_frame_dropper_, DropFrame())
.Times(0);
EXPECT_CALL(tl1_frame_dropper_, DropFrame())
.Times(0);
flags = layers_->EncodeFlags(timestamp);
EXPECT_EQ(0, flags);
timestamp += kTimestampDelta5Fps;
layers_->PopulateCodecSpecific(false, &vp8_info, timestamp);
EXPECT_EQ(static_cast<uint8_t>(kNoTemporalIdx), vp8_info.temporalIdx);
EXPECT_FALSE(vp8_info.layerSync);
EXPECT_EQ(kNoTl0PicIdx, vp8_info.tl0PicIdx);
layers_->FrameEncoded(kFrameSize, timestamp);
}
TEST_F(ScreenshareLayerTest, 2Layer) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
EXPECT_TRUE(layers_->ConfigureBitrates(100, 1000, 5, NULL));
int flags = 0;
uint32_t timestamp = 0;
uint8_t expected_tl0_idx = 0;
CodecSpecificInfoVP8 vp8_info;
SetEncodeExpectations(false, false, 1);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kFlagsTL0, flags);
EXPECT_EQ(0, vp8_info.temporalIdx);
EXPECT_FALSE(vp8_info.layerSync);
++expected_tl0_idx;
EXPECT_EQ(expected_tl0_idx, vp8_info.tl0PicIdx);
EXPECT_CALL(tl1_frame_dropper_, SetRates(1000, 1))
.Times(1);
EXPECT_TRUE(layers_->ConfigureBitrates(100, 1000, -1, NULL));
// Insert 5 frames at 30 fps. All should belong to TL0.
for (int i = 0; i < 5; ++i) {
timestamp += kTimestampDelta30Fps;
// First iteration has a framerate based on a single frame, thus 1.
SetEncodeExpectations(false, false, 30);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(0, vp8_info.temporalIdx);
EXPECT_FALSE(vp8_info.layerSync);
++expected_tl0_idx;
EXPECT_EQ(expected_tl0_idx, vp8_info.tl0PicIdx);
}
// Drop two frames from TL0, thus being coded in TL1.
timestamp += kTimestampDelta30Fps;
SetEncodeExpectations(true, false, 30);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kFlagsTL1Sync, flags);
EXPECT_EQ(1, vp8_info.temporalIdx);
EXPECT_TRUE(vp8_info.layerSync);
EXPECT_EQ(expected_tl0_idx, vp8_info.tl0PicIdx);
timestamp += kTimestampDelta30Fps;
SetEncodeExpectations(true, false, 30);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kFlagsTL1, flags);
EXPECT_EQ(1, vp8_info.temporalIdx);
EXPECT_FALSE(vp8_info.layerSync);
EXPECT_EQ(expected_tl0_idx, vp8_info.tl0PicIdx);
}
TEST_F(ScreenshareLayerTest, 2LayersPeriodicSync) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
EXPECT_TRUE(layers_->ConfigureBitrates(100, 1000, 5, NULL));
int flags = 0;
uint32_t timestamp = 0;
CodecSpecificInfoVP8 vp8_info;
const int kNumFrames = 10;
const bool kDrops[kNumFrames] = {false, true, true, true, true,
true, true, true, true, true};
const int kExpectedFramerates[kNumFrames] = {1, 5, 5, 5, 5, 5, 5, 5, 5, 5};
const bool kExpectedSyncs[kNumFrames] = {false, true, false, false, false,
false, false, true, false, false};
const int kExpectedTemporalIdx[kNumFrames] = {0, 1, 1, 1, 1, 1, 1, 1, 1, 1};
for (int i = 0; i < kNumFrames; ++i) {
timestamp += kTimestampDelta5Fps;
SetEncodeExpectations(kDrops[i], false, kExpectedFramerates[i]);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kExpectedTemporalIdx[i], vp8_info.temporalIdx);
EXPECT_EQ(kExpectedSyncs[i], vp8_info.layerSync) << "Iteration: " << i;
EXPECT_EQ(1, vp8_info.tl0PicIdx);
}
}
TEST_F(ScreenshareLayerTest, 2LayersToggling) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
EXPECT_TRUE(layers_->ConfigureBitrates(100, 1000, 5, NULL));
int flags = 0;
uint32_t timestamp = 0;
CodecSpecificInfoVP8 vp8_info;
const int kNumFrames = 10;
const bool kDrops[kNumFrames] = {false, true, false, true, false,
true, false, true, false, true};
const int kExpectedFramerates[kNumFrames] = {1, 5, 5, 5, 5, 5, 5, 5, 5, 5};
const bool kExpectedSyncs[kNumFrames] = {false, true, false, false, false,
false, false, true, false, false};
const int kExpectedTemporalIdx[kNumFrames] = {0, 1, 0, 1, 0, 1, 0, 1, 0, 1};
const int kExpectedTl0Idx[kNumFrames] = {1, 1, 2, 2, 3, 3, 4, 4, 5, 5};
for (int i = 0; i < kNumFrames; ++i) {
timestamp += kTimestampDelta5Fps;
SetEncodeExpectations(kDrops[i], false, kExpectedFramerates[i]);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kExpectedTemporalIdx[i], vp8_info.temporalIdx);
EXPECT_EQ(kExpectedSyncs[i], vp8_info.layerSync) << "Iteration: " << i;
EXPECT_EQ(kExpectedTl0Idx[i], vp8_info.tl0PicIdx);
}
}
TEST_F(ScreenshareLayerTest, 2LayersBothDrops) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
EXPECT_TRUE(layers_->ConfigureBitrates(100, 1000, 5, NULL));
int flags = 0;
uint32_t timestamp = 0;
uint8_t expected_tl0_idx = 0;
CodecSpecificInfoVP8 vp8_info;
SetEncodeExpectations(false, false, 1);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kFlagsTL0, flags);
EXPECT_EQ(0, vp8_info.temporalIdx);
EXPECT_FALSE(vp8_info.layerSync);
++expected_tl0_idx;
EXPECT_EQ(expected_tl0_idx, vp8_info.tl0PicIdx);
timestamp += kTimestampDelta5Fps;
SetEncodeExpectations(true, false, 5);
EncodeFrame(timestamp, false, &vp8_info, &flags);
EXPECT_EQ(kFlagsTL1Sync, flags);
EXPECT_EQ(1, vp8_info.temporalIdx);
EXPECT_TRUE(vp8_info.layerSync);
EXPECT_EQ(expected_tl0_idx, vp8_info.tl0PicIdx);
timestamp += kTimestampDelta5Fps;
SetEncodeExpectations(true, true, 5);
flags = layers_->EncodeFlags(timestamp);
EXPECT_EQ(-1, flags);
}
TEST_F(ScreenshareLayerTest, TargetBitrateCappedByTL0) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
vpx_codec_enc_cfg_t cfg;
layers_->ConfigureBitrates(100, 1000, 5, &cfg);
EXPECT_EQ(static_cast<unsigned int>(
ScreenshareLayers::kMaxTL0FpsReduction * 100 + 0.5),
cfg.rc_target_bitrate);
}
TEST_F(ScreenshareLayerTest, TargetBitrateCappedByTL1) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
vpx_codec_enc_cfg_t cfg;
layers_->ConfigureBitrates(100, 450, 5, &cfg);
EXPECT_EQ(static_cast<unsigned int>(
450 / ScreenshareLayers::kAcceptableTargetOvershoot),
cfg.rc_target_bitrate);
}
TEST_F(ScreenshareLayerTest, TargetBitrateBelowTL0) {
layers_.reset(
new ScreenshareLayersFT(2, 0, &tl0_frame_dropper_, &tl1_frame_dropper_));
vpx_codec_enc_cfg_t cfg;
layers_->ConfigureBitrates(100, 100, 5, &cfg);
EXPECT_EQ(100U, cfg.rc_target_bitrate);
}
} // namespace webrtc
|
