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| 1 /* | 1 /* |
| 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #include <memory> | 11 #include <memory> |
| 12 #include <vector> | 12 #include <vector> |
| 13 | 13 |
| 14 #include "vpx/vp8cx.h" | 14 #include "vpx/vp8cx.h" |
| 15 #include "vpx/vpx_encoder.h" | 15 #include "vpx/vpx_encoder.h" |
| 16 #include "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h" | 16 #include "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h" |
| 17 #include "webrtc/modules/video_coding/include/video_codec_interface.h" | 17 #include "webrtc/modules/video_coding/include/video_codec_interface.h" |
| 18 #include "webrtc/modules/video_coding/utility/mock/mock_frame_dropper.h" | 18 #include "webrtc/modules/video_coding/utility/mock/mock_frame_dropper.h" |
| 19 #include "webrtc/system_wrappers/include/clock.h" | 19 #include "webrtc/system_wrappers/include/clock.h" |
| 20 #include "webrtc/system_wrappers/include/metrics.h" | 20 #include "webrtc/system_wrappers/include/metrics.h" |
| 21 #include "webrtc/system_wrappers/include/metrics_default.h" | 21 #include "webrtc/system_wrappers/include/metrics_default.h" |
| 22 #include "webrtc/test/gtest.h" | 22 #include "webrtc/test/gtest.h" |
| 23 | 23 |
| 24 using ::testing::_; | 24 using ::testing::_; |
| 25 using ::testing::ElementsAre; | |
| 26 using ::testing::NiceMock; | 25 using ::testing::NiceMock; |
| 27 using ::testing::Return; | 26 using ::testing::Return; |
| 28 | 27 |
| 29 namespace webrtc { | 28 namespace webrtc { |
| 30 | 29 |
| 31 // 5 frames per second at 90 kHz. | 30 // 5 frames per second at 90 kHz. |
| 32 const uint32_t kTimestampDelta5Fps = 90000 / 5; | 31 const uint32_t kTimestampDelta5Fps = 90000 / 5; |
| 33 const int kDefaultQp = 54; | 32 const int kDefaultQp = 54; |
| 34 const int kDefaultTl0BitrateKbps = 200; | 33 const int kDefaultTl0BitrateKbps = 200; |
| 35 const int kDefaultTl1BitrateKbps = 2000; | 34 const int kDefaultTl1BitrateKbps = 2000; |
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| 55 layers_->PopulateCodecSpecific(base_sync, vp8_info, timestamp); | 54 layers_->PopulateCodecSpecific(base_sync, vp8_info, timestamp); |
| 56 ASSERT_NE(-1, frame_size_); | 55 ASSERT_NE(-1, frame_size_); |
| 57 layers_->FrameEncoded(frame_size_, timestamp, kDefaultQp); | 56 layers_->FrameEncoded(frame_size_, timestamp, kDefaultQp); |
| 58 } | 57 } |
| 59 | 58 |
| 60 void ConfigureBitrates() { | 59 void ConfigureBitrates() { |
| 61 vpx_codec_enc_cfg_t vpx_cfg; | 60 vpx_codec_enc_cfg_t vpx_cfg; |
| 62 memset(&vpx_cfg, 0, sizeof(vpx_codec_enc_cfg_t)); | 61 memset(&vpx_cfg, 0, sizeof(vpx_codec_enc_cfg_t)); |
| 63 vpx_cfg.rc_min_quantizer = min_qp_; | 62 vpx_cfg.rc_min_quantizer = min_qp_; |
| 64 vpx_cfg.rc_max_quantizer = max_qp_; | 63 vpx_cfg.rc_max_quantizer = max_qp_; |
| 65 EXPECT_THAT(layers_->OnRatesUpdated(kDefaultTl0BitrateKbps, | 64 EXPECT_TRUE(layers_->ConfigureBitrates( |
| 66 kDefaultTl1BitrateKbps, kFrameRate), | 65 kDefaultTl0BitrateKbps, kDefaultTl1BitrateKbps, kFrameRate, &vpx_cfg)); |
| 67 ElementsAre(kDefaultTl0BitrateKbps, | |
| 68 kDefaultTl1BitrateKbps - kDefaultTl0BitrateKbps)); | |
| 69 EXPECT_TRUE(layers_->UpdateConfiguration(&vpx_cfg)); | |
| 70 frame_size_ = ((vpx_cfg.rc_target_bitrate * 1000) / 8) / kFrameRate; | 66 frame_size_ = ((vpx_cfg.rc_target_bitrate * 1000) / 8) / kFrameRate; |
| 71 } | 67 } |
| 72 | 68 |
| 73 void WithQpLimits(int min_qp, int max_qp) { | 69 void WithQpLimits(int min_qp, int max_qp) { |
| 74 min_qp_ = min_qp; | 70 min_qp_ = min_qp; |
| 75 max_qp_ = max_qp; | 71 max_qp_ = max_qp; |
| 76 } | 72 } |
| 77 | 73 |
| 78 int RunGracePeriod() { | 74 int RunGracePeriod() { |
| 79 int flags = 0; | 75 int flags = 0; |
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| 370 } | 366 } |
| 371 } | 367 } |
| 372 } | 368 } |
| 373 | 369 |
| 374 EXPECT_EQ(50, tl0_frames + tl1_frames); | 370 EXPECT_EQ(50, tl0_frames + tl1_frames); |
| 375 EXPECT_EQ(50, dropped_frames); | 371 EXPECT_EQ(50, dropped_frames); |
| 376 } | 372 } |
| 377 | 373 |
| 378 TEST_F(ScreenshareLayerTest, TargetBitrateCappedByTL0) { | 374 TEST_F(ScreenshareLayerTest, TargetBitrateCappedByTL0) { |
| 379 vpx_codec_enc_cfg_t cfg = GetConfig(); | 375 vpx_codec_enc_cfg_t cfg = GetConfig(); |
| 380 const int kTl0_kbps = 100; | 376 layers_->ConfigureBitrates(100, 1000, 5, &cfg); |
| 381 const int kTl1_kbps = 1000; | |
| 382 layers_->OnRatesUpdated(kTl0_kbps, kTl1_kbps, 5); | |
| 383 | |
| 384 EXPECT_THAT(layers_->OnRatesUpdated(kTl0_kbps, kTl1_kbps, 5), | |
| 385 ElementsAre(kTl0_kbps, kTl1_kbps - kTl0_kbps)); | |
| 386 EXPECT_TRUE(layers_->UpdateConfiguration(&cfg)); | |
| 387 | 377 |
| 388 EXPECT_EQ(static_cast<unsigned int>( | 378 EXPECT_EQ(static_cast<unsigned int>( |
| 389 ScreenshareLayers::kMaxTL0FpsReduction * kTl0_kbps + 0.5), | 379 ScreenshareLayers::kMaxTL0FpsReduction * 100 + 0.5), |
| 390 cfg.rc_target_bitrate); | 380 cfg.rc_target_bitrate); |
| 391 } | 381 } |
| 392 | 382 |
| 393 TEST_F(ScreenshareLayerTest, TargetBitrateCappedByTL1) { | 383 TEST_F(ScreenshareLayerTest, TargetBitrateCappedByTL1) { |
| 394 vpx_codec_enc_cfg_t cfg = GetConfig(); | 384 vpx_codec_enc_cfg_t cfg = GetConfig(); |
| 395 const int kTl0_kbps = 100; | 385 layers_->ConfigureBitrates(100, 450, 5, &cfg); |
| 396 const int kTl1_kbps = 450; | |
| 397 EXPECT_THAT(layers_->OnRatesUpdated(kTl0_kbps, kTl1_kbps, 5), | |
| 398 ElementsAre(kTl0_kbps, kTl1_kbps - kTl0_kbps)); | |
| 399 EXPECT_TRUE(layers_->UpdateConfiguration(&cfg)); | |
| 400 | 386 |
| 401 EXPECT_EQ(static_cast<unsigned int>( | 387 EXPECT_EQ(static_cast<unsigned int>( |
| 402 kTl1_kbps / ScreenshareLayers::kAcceptableTargetOvershoot), | 388 450 / ScreenshareLayers::kAcceptableTargetOvershoot), |
| 403 cfg.rc_target_bitrate); | 389 cfg.rc_target_bitrate); |
| 404 } | 390 } |
| 405 | 391 |
| 406 TEST_F(ScreenshareLayerTest, TargetBitrateBelowTL0) { | 392 TEST_F(ScreenshareLayerTest, TargetBitrateBelowTL0) { |
| 407 vpx_codec_enc_cfg_t cfg = GetConfig(); | 393 vpx_codec_enc_cfg_t cfg = GetConfig(); |
| 408 const int kTl0_kbps = 100; | 394 layers_->ConfigureBitrates(100, 100, 5, &cfg); |
| 409 const int kTl1_kbps = 100; | |
| 410 EXPECT_THAT(layers_->OnRatesUpdated(kTl0_kbps, kTl1_kbps, 5), | |
| 411 ElementsAre(kTl0_kbps)); | |
| 412 EXPECT_TRUE(layers_->UpdateConfiguration(&cfg)); | |
| 413 | 395 |
| 414 EXPECT_EQ(static_cast<uint32_t>(kTl1_kbps), cfg.rc_target_bitrate); | 396 EXPECT_EQ(100U, cfg.rc_target_bitrate); |
| 415 } | 397 } |
| 416 | 398 |
| 417 TEST_F(ScreenshareLayerTest, EncoderDrop) { | 399 TEST_F(ScreenshareLayerTest, EncoderDrop) { |
| 418 ConfigureBitrates(); | 400 ConfigureBitrates(); |
| 419 CodecSpecificInfoVP8 vp8_info; | 401 CodecSpecificInfoVP8 vp8_info; |
| 420 vpx_codec_enc_cfg_t cfg = GetConfig(); | 402 vpx_codec_enc_cfg_t cfg = GetConfig(); |
| 421 | 403 |
| 422 uint32_t timestamp = RunGracePeriod(); | 404 uint32_t timestamp = RunGracePeriod(); |
| 423 timestamp = SkipUntilTl(0, timestamp); | 405 timestamp = SkipUntilTl(0, timestamp); |
| 424 | 406 |
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| 464 EXPECT_EQ(cfg.rc_max_quantizer, static_cast<unsigned int>(kDefaultQp)); | 446 EXPECT_EQ(cfg.rc_max_quantizer, static_cast<unsigned int>(kDefaultQp)); |
| 465 layers_->FrameEncoded(frame_size_, timestamp, kDefaultQp); | 447 layers_->FrameEncoded(frame_size_, timestamp, kDefaultQp); |
| 466 } | 448 } |
| 467 | 449 |
| 468 TEST_F(ScreenshareLayerTest, RespectsMaxIntervalBetweenFrames) { | 450 TEST_F(ScreenshareLayerTest, RespectsMaxIntervalBetweenFrames) { |
| 469 const int kLowBitrateKbps = 50; | 451 const int kLowBitrateKbps = 50; |
| 470 const int kLargeFrameSizeBytes = 100000; | 452 const int kLargeFrameSizeBytes = 100000; |
| 471 const uint32_t kStartTimestamp = 1234; | 453 const uint32_t kStartTimestamp = 1234; |
| 472 | 454 |
| 473 vpx_codec_enc_cfg_t cfg = GetConfig(); | 455 vpx_codec_enc_cfg_t cfg = GetConfig(); |
| 474 layers_->OnRatesUpdated(kLowBitrateKbps, kLowBitrateKbps, 5); | 456 layers_->ConfigureBitrates(kLowBitrateKbps, kLowBitrateKbps, 5, &cfg); |
| 475 layers_->UpdateConfiguration(&cfg); | |
| 476 | 457 |
| 477 EXPECT_EQ(ScreenshareLayers::kTl0Flags, | 458 EXPECT_EQ(ScreenshareLayers::kTl0Flags, |
| 478 layers_->EncodeFlags(kStartTimestamp)); | 459 layers_->EncodeFlags(kStartTimestamp)); |
| 479 layers_->FrameEncoded(kLargeFrameSizeBytes, kStartTimestamp, kDefaultQp); | 460 layers_->FrameEncoded(kLargeFrameSizeBytes, kStartTimestamp, kDefaultQp); |
| 480 | 461 |
| 481 const uint32_t kTwoSecondsLater = | 462 const uint32_t kTwoSecondsLater = |
| 482 kStartTimestamp + (ScreenshareLayers::kMaxFrameIntervalMs * 90); | 463 kStartTimestamp + (ScreenshareLayers::kMaxFrameIntervalMs * 90); |
| 483 | 464 |
| 484 // Sanity check, repayment time should exceed kMaxFrameIntervalMs. | 465 // Sanity check, repayment time should exceed kMaxFrameIntervalMs. |
| 485 ASSERT_GT(kStartTimestamp + 90 * (kLargeFrameSizeBytes * 8) / kLowBitrateKbps, | 466 ASSERT_GT(kStartTimestamp + 90 * (kLargeFrameSizeBytes * 8) / kLowBitrateKbps, |
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| 564 metrics::NumEvents("WebRTC.Video.Screenshare.Layer1.Qp", kTl1Qp)); | 545 metrics::NumEvents("WebRTC.Video.Screenshare.Layer1.Qp", kTl1Qp)); |
| 565 EXPECT_EQ(1, | 546 EXPECT_EQ(1, |
| 566 metrics::NumEvents("WebRTC.Video.Screenshare.Layer0.TargetBitrate", | 547 metrics::NumEvents("WebRTC.Video.Screenshare.Layer0.TargetBitrate", |
| 567 kDefaultTl0BitrateKbps)); | 548 kDefaultTl0BitrateKbps)); |
| 568 EXPECT_EQ(1, | 549 EXPECT_EQ(1, |
| 569 metrics::NumEvents("WebRTC.Video.Screenshare.Layer1.TargetBitrate", | 550 metrics::NumEvents("WebRTC.Video.Screenshare.Layer1.TargetBitrate", |
| 570 kDefaultTl1BitrateKbps)); | 551 kDefaultTl1BitrateKbps)); |
| 571 } | 552 } |
| 572 | 553 |
| 573 } // namespace webrtc | 554 } // namespace webrtc |
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