stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 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 | |
pbos@webrtc.org | 24e2089 | 2013-10-28 16:32:01 +0000 | [diff] [blame] | 11 | #include "webrtc/test/fake_encoder.h" |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 12 | |
| 13 | #include "testing/gtest/include/gtest/gtest.h" |
| 14 | |
| 15 | namespace webrtc { |
pbos@webrtc.org | 9e70940 | 2013-09-03 09:10:37 +0000 | [diff] [blame] | 16 | namespace test { |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 17 | |
| 18 | FakeEncoder::FakeEncoder(Clock* clock) |
| 19 | : clock_(clock), |
| 20 | callback_(NULL), |
| 21 | target_bitrate_kbps_(0), |
| 22 | last_encode_time_ms_(0) { |
sprang@webrtc.org | 2e98d45 | 2013-11-26 11:41:59 +0000 | [diff] [blame] | 23 | // Generate some arbitrary not-all-zero data |
| 24 | for (size_t i = 0; i < sizeof(encoded_buffer_); ++i) { |
| 25 | encoded_buffer_[i] = static_cast<uint8_t>(i); |
| 26 | } |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 27 | } |
| 28 | |
| 29 | FakeEncoder::~FakeEncoder() {} |
| 30 | |
pbos@webrtc.org | 618a0ec | 2013-09-09 08:26:30 +0000 | [diff] [blame] | 31 | void FakeEncoder::SetCodecSettings(VideoCodec* codec, |
sprang@webrtc.org | 2e98d45 | 2013-11-26 11:41:59 +0000 | [diff] [blame] | 32 | size_t num_streams) { |
pbos@webrtc.org | 9e70940 | 2013-09-03 09:10:37 +0000 | [diff] [blame] | 33 | assert(num_streams > 0); |
| 34 | assert(num_streams <= kMaxSimulcastStreams); |
| 35 | |
| 36 | static const SimulcastStream stream_settings[] = { |
| 37 | {320, 180, 0, 150, 150, 50, codec->qpMax}, |
| 38 | {640, 360, 0, 500, 500, 150, codec->qpMax}, |
| 39 | {1280, 720, 0, 1200, 1200, 600, codec->qpMax}}; |
| 40 | // Add more streams to the settings above with reasonable values if required. |
| 41 | assert(num_streams <= sizeof(stream_settings) / sizeof(stream_settings[0])); |
| 42 | |
| 43 | codec->numberOfSimulcastStreams = static_cast<unsigned char>(num_streams); |
| 44 | |
| 45 | unsigned int sum_of_max_bitrates = 0; |
| 46 | for (size_t i = 0; i < num_streams; ++i) { |
| 47 | codec->simulcastStream[i] = stream_settings[i]; |
| 48 | sum_of_max_bitrates += stream_settings[i].maxBitrate; |
| 49 | } |
| 50 | |
| 51 | size_t last_stream = num_streams - 1; |
| 52 | codec->width = stream_settings[last_stream].width; |
| 53 | codec->height = stream_settings[last_stream].height; |
| 54 | // Start with the average for the middle stream's max/min settings. |
| 55 | codec->startBitrate = (stream_settings[last_stream / 2].maxBitrate + |
| 56 | stream_settings[last_stream / 2].minBitrate) / |
| 57 | 2; |
| 58 | codec->minBitrate = stream_settings[0].minBitrate; |
| 59 | codec->maxBitrate = sum_of_max_bitrates; |
pbos@webrtc.org | 618a0ec | 2013-09-09 08:26:30 +0000 | [diff] [blame] | 60 | |
| 61 | codec->codecType = kVideoCodecGeneric; |
| 62 | strcpy(codec->plName, "FAKE"); |
pbos@webrtc.org | 9e70940 | 2013-09-03 09:10:37 +0000 | [diff] [blame] | 63 | } |
| 64 | |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 65 | int32_t FakeEncoder::InitEncode(const VideoCodec* config, |
| 66 | int32_t number_of_cores, |
| 67 | uint32_t max_payload_size) { |
| 68 | config_ = *config; |
| 69 | target_bitrate_kbps_ = config_.startBitrate; |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | int32_t FakeEncoder::Encode( |
| 74 | const I420VideoFrame& input_image, |
| 75 | const CodecSpecificInfo* codec_specific_info, |
| 76 | const std::vector<VideoFrameType>* frame_types) { |
| 77 | assert(config_.maxFramerate > 0); |
| 78 | int delta_since_last_encode = 1000 / config_.maxFramerate; |
| 79 | int64_t time_now_ms = clock_->TimeInMilliseconds(); |
| 80 | if (last_encode_time_ms_ > 0) { |
| 81 | // For all frames but the first we can estimate the display time by looking |
| 82 | // at the display time of the previous frame. |
| 83 | delta_since_last_encode = time_now_ms - last_encode_time_ms_; |
| 84 | } |
| 85 | |
| 86 | int bits_available = target_bitrate_kbps_ * delta_since_last_encode; |
pbos@webrtc.org | 618a0ec | 2013-09-09 08:26:30 +0000 | [diff] [blame] | 87 | int min_bits = |
| 88 | config_.simulcastStream[0].minBitrate * delta_since_last_encode; |
| 89 | if (bits_available < min_bits) |
| 90 | bits_available = min_bits; |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 91 | last_encode_time_ms_ = time_now_ms; |
| 92 | |
| 93 | for (int i = 0; i < config_.numberOfSimulcastStreams; ++i) { |
| 94 | CodecSpecificInfo specifics; |
| 95 | memset(&specifics, 0, sizeof(specifics)); |
pbos@webrtc.org | 618a0ec | 2013-09-09 08:26:30 +0000 | [diff] [blame] | 96 | specifics.codecType = kVideoCodecGeneric; |
| 97 | specifics.codecSpecific.generic.simulcast_idx = i; |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 98 | int min_stream_bits = config_.simulcastStream[i].minBitrate * |
| 99 | delta_since_last_encode; |
| 100 | int max_stream_bits = config_.simulcastStream[i].maxBitrate * |
| 101 | delta_since_last_encode; |
| 102 | int stream_bits = (bits_available > max_stream_bits) ? max_stream_bits : |
| 103 | bits_available; |
| 104 | int stream_bytes = (stream_bits + 7) / 8; |
pbos@webrtc.org | 0f911c9 | 2013-08-22 12:34:58 +0000 | [diff] [blame] | 105 | if (static_cast<size_t>(stream_bytes) > sizeof(encoded_buffer_)) |
henrik.lundin@webrtc.org | 6036f56 | 2013-10-23 11:04:57 +0000 | [diff] [blame] | 106 | stream_bytes = sizeof(encoded_buffer_); |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 107 | |
pbos@webrtc.org | 0f911c9 | 2013-08-22 12:34:58 +0000 | [diff] [blame] | 108 | EncodedImage encoded( |
| 109 | encoded_buffer_, stream_bytes, sizeof(encoded_buffer_)); |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 110 | encoded._timeStamp = input_image.timestamp(); |
| 111 | encoded.capture_time_ms_ = input_image.render_time_ms(); |
pbos@webrtc.org | 618a0ec | 2013-09-09 08:26:30 +0000 | [diff] [blame] | 112 | encoded._frameType = (*frame_types)[i]; |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 113 | if (min_stream_bits > bits_available) { |
| 114 | encoded._length = 0; |
| 115 | encoded._frameType = kSkipFrame; |
| 116 | } |
| 117 | if (callback_->Encoded(encoded, &specifics, NULL) != 0) |
| 118 | return -1; |
| 119 | |
| 120 | bits_available -= encoded._length * 8; |
| 121 | } |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | int32_t FakeEncoder::RegisterEncodeCompleteCallback( |
| 126 | EncodedImageCallback* callback) { |
| 127 | callback_ = callback; |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | int32_t FakeEncoder::Release() { return 0; } |
| 132 | |
| 133 | int32_t FakeEncoder::SetChannelParameters(uint32_t packet_loss, int rtt) { |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | int32_t FakeEncoder::SetRates(uint32_t new_target_bitrate, uint32_t framerate) { |
| 138 | target_bitrate_kbps_ = new_target_bitrate; |
| 139 | return 0; |
| 140 | } |
pbos@webrtc.org | 9e70940 | 2013-09-03 09:10:37 +0000 | [diff] [blame] | 141 | } // namespace test |
stefan@webrtc.org | 55afdbe | 2013-08-22 09:29:56 +0000 | [diff] [blame] | 142 | } // namespace webrtc |