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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 "webrtc/test/fake_encoder.h" | 11 #include "webrtc/test/fake_encoder.h" |
12 | 12 |
13 #include "testing/gtest/include/gtest/gtest.h" | 13 #include "testing/gtest/include/gtest/gtest.h" |
14 | 14 |
15 #include "webrtc/base/checks.h" | |
16 #include "webrtc/modules/video_coding/include/video_codec_interface.h" | 15 #include "webrtc/modules/video_coding/include/video_codec_interface.h" |
17 #include "webrtc/system_wrappers/include/sleep.h" | 16 #include "webrtc/system_wrappers/include/sleep.h" |
18 | 17 |
19 namespace webrtc { | 18 namespace webrtc { |
20 namespace test { | 19 namespace test { |
21 | 20 |
22 FakeEncoder::FakeEncoder(Clock* clock) | 21 FakeEncoder::FakeEncoder(Clock* clock) |
23 : clock_(clock), | 22 : clock_(clock), |
24 callback_(NULL), | 23 callback_(NULL), |
25 target_bitrate_kbps_(0), | 24 target_bitrate_kbps_(0), |
26 max_target_bitrate_kbps_(-1), | 25 max_target_bitrate_kbps_(-1), |
27 last_encode_time_ms_(0) { | 26 last_encode_time_ms_(0) { |
28 // Generate some arbitrary not-all-zero data | 27 // Generate some arbitrary not-all-zero data |
29 for (size_t i = 0; i < sizeof(encoded_buffer_); ++i) { | 28 for (size_t i = 0; i < sizeof(encoded_buffer_); ++i) { |
30 encoded_buffer_[i] = static_cast<uint8_t>(i); | 29 encoded_buffer_[i] = static_cast<uint8_t>(i); |
31 } | 30 } |
32 } | 31 } |
33 | 32 |
34 FakeEncoder::~FakeEncoder() {} | 33 FakeEncoder::~FakeEncoder() {} |
35 | 34 |
36 void FakeEncoder::SetMaxBitrate(int max_kbps) { | 35 void FakeEncoder::SetMaxBitrate(int max_kbps) { |
37 RTC_DCHECK_GE(max_kbps, -1); // max_kbps == -1 disables it. | 36 assert(max_kbps >= -1); // max_kbps == -1 disables it. |
38 max_target_bitrate_kbps_ = max_kbps; | 37 max_target_bitrate_kbps_ = max_kbps; |
39 } | 38 } |
40 | 39 |
41 int32_t FakeEncoder::InitEncode(const VideoCodec* config, | 40 int32_t FakeEncoder::InitEncode(const VideoCodec* config, |
42 int32_t number_of_cores, | 41 int32_t number_of_cores, |
43 size_t max_payload_size) { | 42 size_t max_payload_size) { |
44 config_ = *config; | 43 config_ = *config; |
45 target_bitrate_kbps_ = config_.startBitrate; | 44 target_bitrate_kbps_ = config_.startBitrate; |
46 return 0; | 45 return 0; |
47 } | 46 } |
48 | 47 |
49 int32_t FakeEncoder::Encode(const VideoFrame& input_image, | 48 int32_t FakeEncoder::Encode(const VideoFrame& input_image, |
50 const CodecSpecificInfo* codec_specific_info, | 49 const CodecSpecificInfo* codec_specific_info, |
51 const std::vector<FrameType>* frame_types) { | 50 const std::vector<FrameType>* frame_types) { |
52 RTC_DCHECK_GT(config_.maxFramerate, 0); | 51 assert(config_.maxFramerate > 0); |
53 int64_t time_since_last_encode_ms = 1000 / config_.maxFramerate; | 52 int64_t time_since_last_encode_ms = 1000 / config_.maxFramerate; |
54 int64_t time_now_ms = clock_->TimeInMilliseconds(); | 53 int64_t time_now_ms = clock_->TimeInMilliseconds(); |
55 const bool first_encode = last_encode_time_ms_ == 0; | 54 const bool first_encode = last_encode_time_ms_ == 0; |
56 if (!first_encode) { | 55 if (!first_encode) { |
57 // For all frames but the first we can estimate the display time by looking | 56 // For all frames but the first we can estimate the display time by looking |
58 // at the display time of the previous frame. | 57 // at the display time of the previous frame. |
59 time_since_last_encode_ms = time_now_ms - last_encode_time_ms_; | 58 time_since_last_encode_ms = time_now_ms - last_encode_time_ms_; |
60 } | 59 } |
61 if (time_since_last_encode_ms > 3 * 1000 / config_.maxFramerate) { | 60 if (time_since_last_encode_ms > 3 * 1000 / config_.maxFramerate) { |
62 // Rudimentary check to make sure we don't widely overshoot bitrate target | 61 // Rudimentary check to make sure we don't widely overshoot bitrate target |
63 // when resuming encoding after a suspension. | 62 // when resuming encoding after a suspension. |
64 time_since_last_encode_ms = 3 * 1000 / config_.maxFramerate; | 63 time_since_last_encode_ms = 3 * 1000 / config_.maxFramerate; |
65 } | 64 } |
66 | 65 |
67 size_t bits_available = | 66 size_t bits_available = |
68 static_cast<size_t>(target_bitrate_kbps_ * time_since_last_encode_ms); | 67 static_cast<size_t>(target_bitrate_kbps_ * time_since_last_encode_ms); |
69 size_t min_bits = static_cast<size_t>( | 68 size_t min_bits = static_cast<size_t>( |
70 config_.simulcastStream[0].minBitrate * time_since_last_encode_ms); | 69 config_.simulcastStream[0].minBitrate * time_since_last_encode_ms); |
71 if (bits_available < min_bits) | 70 if (bits_available < min_bits) |
72 bits_available = min_bits; | 71 bits_available = min_bits; |
73 size_t max_bits = | 72 size_t max_bits = |
74 static_cast<size_t>(max_target_bitrate_kbps_ * time_since_last_encode_ms); | 73 static_cast<size_t>(max_target_bitrate_kbps_ * time_since_last_encode_ms); |
75 if (max_bits > 0 && max_bits < bits_available) | 74 if (max_bits > 0 && max_bits < bits_available) |
76 bits_available = max_bits; | 75 bits_available = max_bits; |
77 last_encode_time_ms_ = time_now_ms; | 76 last_encode_time_ms_ = time_now_ms; |
78 | 77 |
79 RTC_DCHECK_GT(config_.numberOfSimulcastStreams, 0); | 78 assert(config_.numberOfSimulcastStreams > 0); |
80 for (unsigned char i = 0; i < config_.numberOfSimulcastStreams; ++i) { | 79 for (unsigned char i = 0; i < config_.numberOfSimulcastStreams; ++i) { |
81 CodecSpecificInfo specifics; | 80 CodecSpecificInfo specifics; |
82 memset(&specifics, 0, sizeof(specifics)); | 81 memset(&specifics, 0, sizeof(specifics)); |
83 specifics.codecType = kVideoCodecGeneric; | 82 specifics.codecType = kVideoCodecGeneric; |
84 specifics.codecSpecific.generic.simulcast_idx = i; | 83 specifics.codecSpecific.generic.simulcast_idx = i; |
85 size_t min_stream_bits = static_cast<size_t>( | 84 size_t min_stream_bits = static_cast<size_t>( |
86 config_.simulcastStream[i].minBitrate * time_since_last_encode_ms); | 85 config_.simulcastStream[i].minBitrate * time_since_last_encode_ms); |
87 size_t max_stream_bits = static_cast<size_t>( | 86 size_t max_stream_bits = static_cast<size_t>( |
88 config_.simulcastStream[i].maxBitrate * time_since_last_encode_ms); | 87 config_.simulcastStream[i].maxBitrate * time_since_last_encode_ms); |
89 size_t stream_bits = (bits_available > max_stream_bits) ? max_stream_bits : | 88 size_t stream_bits = (bits_available > max_stream_bits) ? max_stream_bits : |
90 bits_available; | 89 bits_available; |
91 size_t stream_bytes = (stream_bits + 7) / 8; | 90 size_t stream_bytes = (stream_bits + 7) / 8; |
92 if (first_encode) { | 91 if (first_encode) { |
93 // The first frame is a key frame and should be larger. | 92 // The first frame is a key frame and should be larger. |
94 // TODO(holmer): The FakeEncoder should store the bits_available between | 93 // TODO(holmer): The FakeEncoder should store the bits_available between |
95 // encodes so that it can compensate for oversized frames. | 94 // encodes so that it can compensate for oversized frames. |
96 stream_bytes *= 10; | 95 stream_bytes *= 10; |
97 } | 96 } |
98 if (stream_bytes > sizeof(encoded_buffer_)) | 97 if (stream_bytes > sizeof(encoded_buffer_)) |
99 stream_bytes = sizeof(encoded_buffer_); | 98 stream_bytes = sizeof(encoded_buffer_); |
100 | 99 |
101 // Always encode something on the first frame. | |
102 if (min_stream_bits > bits_available && i > 0) | |
103 continue; | |
104 EncodedImage encoded( | 100 EncodedImage encoded( |
105 encoded_buffer_, stream_bytes, sizeof(encoded_buffer_)); | 101 encoded_buffer_, stream_bytes, sizeof(encoded_buffer_)); |
106 encoded._timeStamp = input_image.timestamp(); | 102 encoded._timeStamp = input_image.timestamp(); |
107 encoded.capture_time_ms_ = input_image.render_time_ms(); | 103 encoded.capture_time_ms_ = input_image.render_time_ms(); |
108 encoded._frameType = (*frame_types)[i]; | 104 encoded._frameType = (*frame_types)[i]; |
109 encoded._encodedWidth = config_.simulcastStream[i].width; | 105 encoded._encodedWidth = config_.simulcastStream[i].width; |
110 encoded._encodedHeight = config_.simulcastStream[i].height; | 106 encoded._encodedHeight = config_.simulcastStream[i].height; |
111 RTC_DCHECK(callback_ != NULL); | 107 // Always encode something on the first frame. |
| 108 if (min_stream_bits > bits_available && i > 0) |
| 109 continue; |
| 110 assert(callback_ != NULL); |
112 if (callback_->Encoded(encoded, &specifics, NULL) != 0) | 111 if (callback_->Encoded(encoded, &specifics, NULL) != 0) |
113 return -1; | 112 return -1; |
114 bits_available -= std::min(encoded._length * 8, bits_available); | 113 bits_available -= std::min(encoded._length * 8, bits_available); |
115 } | 114 } |
116 return 0; | 115 return 0; |
117 } | 116 } |
118 | 117 |
119 int32_t FakeEncoder::RegisterEncodeCompleteCallback( | 118 int32_t FakeEncoder::RegisterEncodeCompleteCallback( |
120 EncodedImageCallback* callback) { | 119 EncodedImageCallback* callback) { |
121 callback_ = callback; | 120 callback_ = callback; |
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200 delay_ms_(delay_ms) {} | 199 delay_ms_(delay_ms) {} |
201 | 200 |
202 int32_t DelayedEncoder::Encode(const VideoFrame& input_image, | 201 int32_t DelayedEncoder::Encode(const VideoFrame& input_image, |
203 const CodecSpecificInfo* codec_specific_info, | 202 const CodecSpecificInfo* codec_specific_info, |
204 const std::vector<FrameType>* frame_types) { | 203 const std::vector<FrameType>* frame_types) { |
205 SleepMs(delay_ms_); | 204 SleepMs(delay_ms_); |
206 return FakeEncoder::Encode(input_image, codec_specific_info, frame_types); | 205 return FakeEncoder::Encode(input_image, codec_specific_info, frame_types); |
207 } | 206 } |
208 } // namespace test | 207 } // namespace test |
209 } // namespace webrtc | 208 } // namespace webrtc |
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