1 /*
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
3 *
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
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "webrtc/test/fake_encoder.h"
12
13 #include "testing/gtest/include/gtest/gtest.h"
14
15 namespace webrtc {
16 namespace test {
17
FakeEncoder(Clock * clock)18 FakeEncoder::FakeEncoder(Clock* clock)
19 : clock_(clock),
20 callback_(NULL),
21 target_bitrate_kbps_(0),
22 max_target_bitrate_kbps_(-1),
23 last_encode_time_ms_(0) {
24 // Generate some arbitrary not-all-zero data
25 for (size_t i = 0; i < sizeof(encoded_buffer_); ++i) {
26 encoded_buffer_[i] = static_cast<uint8_t>(i);
27 }
28 }
29
~FakeEncoder()30 FakeEncoder::~FakeEncoder() {}
31
SetMaxBitrate(int max_kbps)32 void FakeEncoder::SetMaxBitrate(int max_kbps) {
33 assert(max_kbps >= -1); // max_kbps == -1 disables it.
34 max_target_bitrate_kbps_ = max_kbps;
35 }
36
InitEncode(const VideoCodec * config,int32_t number_of_cores,uint32_t max_payload_size)37 int32_t FakeEncoder::InitEncode(const VideoCodec* config,
38 int32_t number_of_cores,
39 uint32_t max_payload_size) {
40 config_ = *config;
41 target_bitrate_kbps_ = config_.startBitrate;
42 return 0;
43 }
44
Encode(const I420VideoFrame & input_image,const CodecSpecificInfo * codec_specific_info,const std::vector<VideoFrameType> * frame_types)45 int32_t FakeEncoder::Encode(
46 const I420VideoFrame& input_image,
47 const CodecSpecificInfo* codec_specific_info,
48 const std::vector<VideoFrameType>* frame_types) {
49 assert(config_.maxFramerate > 0);
50 int time_since_last_encode_ms = 1000 / config_.maxFramerate;
51 int64_t time_now_ms = clock_->TimeInMilliseconds();
52 if (last_encode_time_ms_ > 0) {
53 // For all frames but the first we can estimate the display time by looking
54 // at the display time of the previous frame.
55 time_since_last_encode_ms = time_now_ms - last_encode_time_ms_;
56 }
57
58 int bits_available = target_bitrate_kbps_ * time_since_last_encode_ms;
59 int min_bits =
60 config_.simulcastStream[0].minBitrate * time_since_last_encode_ms;
61 if (bits_available < min_bits)
62 bits_available = min_bits;
63 int max_bits = max_target_bitrate_kbps_ * time_since_last_encode_ms;
64 if (max_bits > 0 && max_bits < bits_available)
65 bits_available = max_bits;
66 last_encode_time_ms_ = time_now_ms;
67
68 assert(config_.numberOfSimulcastStreams > 0);
69 for (int i = 0; i < config_.numberOfSimulcastStreams; ++i) {
70 CodecSpecificInfo specifics;
71 memset(&specifics, 0, sizeof(specifics));
72 specifics.codecType = kVideoCodecGeneric;
73 specifics.codecSpecific.generic.simulcast_idx = i;
74 int min_stream_bits =
75 config_.simulcastStream[i].minBitrate * time_since_last_encode_ms;
76 int max_stream_bits =
77 config_.simulcastStream[i].maxBitrate * time_since_last_encode_ms;
78 int stream_bits = (bits_available > max_stream_bits) ? max_stream_bits :
79 bits_available;
80 int stream_bytes = (stream_bits + 7) / 8;
81 if (static_cast<size_t>(stream_bytes) > sizeof(encoded_buffer_))
82 stream_bytes = sizeof(encoded_buffer_);
83
84 EncodedImage encoded(
85 encoded_buffer_, stream_bytes, sizeof(encoded_buffer_));
86 encoded._timeStamp = input_image.timestamp();
87 encoded.capture_time_ms_ = input_image.render_time_ms();
88 encoded._frameType = (*frame_types)[i];
89 // Always encode something on the first frame.
90 if (min_stream_bits > bits_available && i > 0) {
91 encoded._length = 0;
92 encoded._frameType = kSkipFrame;
93 }
94 assert(callback_ != NULL);
95 if (callback_->Encoded(encoded, &specifics, NULL) != 0)
96 return -1;
97
98 bits_available -= encoded._length * 8;
99 }
100 return 0;
101 }
102
RegisterEncodeCompleteCallback(EncodedImageCallback * callback)103 int32_t FakeEncoder::RegisterEncodeCompleteCallback(
104 EncodedImageCallback* callback) {
105 callback_ = callback;
106 return 0;
107 }
108
Release()109 int32_t FakeEncoder::Release() { return 0; }
110
SetChannelParameters(uint32_t packet_loss,int rtt)111 int32_t FakeEncoder::SetChannelParameters(uint32_t packet_loss, int rtt) {
112 return 0;
113 }
114
SetRates(uint32_t new_target_bitrate,uint32_t framerate)115 int32_t FakeEncoder::SetRates(uint32_t new_target_bitrate, uint32_t framerate) {
116 target_bitrate_kbps_ = new_target_bitrate;
117 return 0;
118 }
119
120 } // namespace test
121 } // namespace webrtc
122