| /* |
| * Copyright (c) 2020 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 "modules/video_coding/codecs/av1/libaom_av1_encoder.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "absl/algorithm/container.h" |
| #include "absl/base/macros.h" |
| #include "absl/strings/match.h" |
| #include "absl/types/optional.h" |
| #include "api/field_trials_view.h" |
| #include "api/scoped_refptr.h" |
| #include "api/transport/field_trial_based_config.h" |
| #include "api/video/encoded_image.h" |
| #include "api/video/i420_buffer.h" |
| #include "api/video/video_frame.h" |
| #include "api/video_codecs/scalability_mode.h" |
| #include "api/video_codecs/video_codec.h" |
| #include "api/video_codecs/video_encoder.h" |
| #include "modules/video_coding/include/video_codec_interface.h" |
| #include "modules/video_coding/include/video_error_codes.h" |
| #include "modules/video_coding/svc/create_scalability_structure.h" |
| #include "modules/video_coding/svc/scalable_video_controller.h" |
| #include "modules/video_coding/svc/scalable_video_controller_no_layering.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/experiments/encoder_info_settings.h" |
| #include "rtc_base/logging.h" |
| #include "third_party/libaom/source/libaom/aom/aom_codec.h" |
| #include "third_party/libaom/source/libaom/aom/aom_encoder.h" |
| #include "third_party/libaom/source/libaom/aom/aomcx.h" |
| |
| #if (defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64)) && \ |
| (defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)) |
| #define MOBILE_ARM |
| #endif |
| |
| #define SET_ENCODER_PARAM_OR_RETURN_ERROR(param_id, param_value) \ |
| do { \ |
| if (!SetEncoderControlParameters(param_id, param_value)) { \ |
| return WEBRTC_VIDEO_CODEC_ERROR; \ |
| } \ |
| } while (0) |
| |
| namespace webrtc { |
| namespace { |
| |
| // Encoder configuration parameters |
| constexpr int kQpMin = 10; |
| constexpr int kUsageProfile = AOM_USAGE_REALTIME; |
| constexpr int kMinQindex = 145; // Min qindex threshold for QP scaling. |
| constexpr int kMaxQindex = 205; // Max qindex threshold for QP scaling. |
| constexpr int kBitDepth = 8; |
| constexpr int kLagInFrames = 0; // No look ahead. |
| constexpr int kRtpTicksPerSecond = 90000; |
| constexpr double kMinimumFrameRate = 1.0; |
| |
| aom_superblock_size_t GetSuperblockSize(int width, int height, int threads) { |
| int resolution = width * height; |
| if (threads >= 4 && resolution >= 960 * 540 && resolution < 1920 * 1080) |
| return AOM_SUPERBLOCK_SIZE_64X64; |
| else |
| return AOM_SUPERBLOCK_SIZE_DYNAMIC; |
| } |
| |
| class LibaomAv1Encoder final : public VideoEncoder { |
| public: |
| LibaomAv1Encoder(const absl::optional<LibaomAv1EncoderAuxConfig>& aux_config, |
| const FieldTrialsView& trials); |
| ~LibaomAv1Encoder(); |
| |
| int InitEncode(const VideoCodec* codec_settings, |
| const Settings& settings) override; |
| |
| int32_t RegisterEncodeCompleteCallback( |
| EncodedImageCallback* encoded_image_callback) override; |
| |
| int32_t Release() override; |
| |
| int32_t Encode(const VideoFrame& frame, |
| const std::vector<VideoFrameType>* frame_types) override; |
| |
| void SetRates(const RateControlParameters& parameters) override; |
| |
| EncoderInfo GetEncoderInfo() const override; |
| |
| private: |
| template <typename P> |
| bool SetEncoderControlParameters(int param_id, P param_value); |
| |
| // Get value to be used for encoder cpu_speed setting |
| int GetCpuSpeed(int width, int height); |
| |
| // Determine number of encoder threads to use. |
| int NumberOfThreads(int width, int height, int number_of_cores); |
| |
| bool SvcEnabled() const { return svc_params_.has_value(); } |
| // Fills svc_params_ memeber value. Returns false on error. |
| bool SetSvcParams(ScalableVideoController::StreamLayersConfig svc_config); |
| // Configures the encoder with layer for the next frame. |
| void SetSvcLayerId( |
| const ScalableVideoController::LayerFrameConfig& layer_frame); |
| // Configures the encoder which buffers next frame updates and can reference. |
| void SetSvcRefFrameConfig( |
| const ScalableVideoController::LayerFrameConfig& layer_frame); |
| // If pixel format doesn't match, then reallocate. |
| void MaybeRewrapImgWithFormat(const aom_img_fmt_t fmt); |
| |
| std::unique_ptr<ScalableVideoController> svc_controller_; |
| absl::optional<ScalabilityMode> scalability_mode_; |
| bool inited_; |
| bool rates_configured_; |
| absl::optional<aom_svc_params_t> svc_params_; |
| VideoCodec encoder_settings_; |
| absl::optional<LibaomAv1EncoderAuxConfig> aux_config_; |
| aom_image_t* frame_for_encode_; |
| aom_codec_ctx_t ctx_; |
| aom_codec_enc_cfg_t cfg_; |
| EncodedImageCallback* encoded_image_callback_; |
| int64_t timestamp_; |
| const LibaomAv1EncoderInfoSettings encoder_info_override_; |
| // TODO(webrtc:15225): Kill switch for disabling frame dropping. Remove it |
| // after frame dropping is fully rolled out. |
| bool disable_frame_dropping_; |
| }; |
| |
| int32_t VerifyCodecSettings(const VideoCodec& codec_settings) { |
| if (codec_settings.width < 1) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (codec_settings.height < 1) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| // maxBitrate == 0 represents an unspecified maxBitRate. |
| if (codec_settings.maxBitrate > 0 && |
| codec_settings.minBitrate > codec_settings.maxBitrate) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (codec_settings.maxBitrate > 0 && |
| codec_settings.startBitrate > codec_settings.maxBitrate) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (codec_settings.startBitrate < codec_settings.minBitrate) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (codec_settings.maxFramerate < 1) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (codec_settings.qpMax < kQpMin || codec_settings.qpMax > 63) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| return WEBRTC_VIDEO_CODEC_OK; |
| } |
| |
| LibaomAv1Encoder::LibaomAv1Encoder( |
| const absl::optional<LibaomAv1EncoderAuxConfig>& aux_config, |
| const FieldTrialsView& trials) |
| : inited_(false), |
| rates_configured_(false), |
| aux_config_(aux_config), |
| frame_for_encode_(nullptr), |
| encoded_image_callback_(nullptr), |
| timestamp_(0), |
| disable_frame_dropping_(absl::StartsWith( |
| trials.Lookup("WebRTC-LibaomAv1Encoder-DisableFrameDropping"), |
| "Enabled")) {} |
| |
| LibaomAv1Encoder::~LibaomAv1Encoder() { |
| Release(); |
| } |
| |
| int LibaomAv1Encoder::InitEncode(const VideoCodec* codec_settings, |
| const Settings& settings) { |
| if (codec_settings == nullptr) { |
| RTC_LOG(LS_WARNING) << "No codec settings provided to " |
| "LibaomAv1Encoder."; |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (settings.number_of_cores < 1) { |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| if (inited_) { |
| RTC_LOG(LS_WARNING) << "Initing LibaomAv1Encoder without first releasing."; |
| Release(); |
| } |
| encoder_settings_ = *codec_settings; |
| |
| // Sanity checks for encoder configuration. |
| const int32_t result = VerifyCodecSettings(encoder_settings_); |
| if (result < 0) { |
| RTC_LOG(LS_WARNING) << "Incorrect codec settings provided to " |
| "LibaomAv1Encoder."; |
| return result; |
| } |
| if (encoder_settings_.numberOfSimulcastStreams > 1) { |
| RTC_LOG(LS_WARNING) << "Simulcast is not implemented by LibaomAv1Encoder."; |
| return result; |
| } |
| scalability_mode_ = encoder_settings_.GetScalabilityMode(); |
| if (!scalability_mode_.has_value()) { |
| RTC_LOG(LS_WARNING) << "Scalability mode is not set, using 'L1T1'."; |
| scalability_mode_ = ScalabilityMode::kL1T1; |
| } |
| svc_controller_ = CreateScalabilityStructure(*scalability_mode_); |
| if (svc_controller_ == nullptr) { |
| RTC_LOG(LS_WARNING) << "Failed to set scalability mode " |
| << static_cast<int>(*scalability_mode_); |
| return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; |
| } |
| |
| if (!SetSvcParams(svc_controller_->StreamConfig())) { |
| return WEBRTC_VIDEO_CODEC_ERROR; |
| } |
| |
| // Initialize encoder configuration structure with default values |
| aom_codec_err_t ret = |
| aom_codec_enc_config_default(aom_codec_av1_cx(), &cfg_, kUsageProfile); |
| if (ret != AOM_CODEC_OK) { |
| RTC_LOG(LS_WARNING) << "LibaomAv1Encoder::EncodeInit returned " << ret |
| << " on aom_codec_enc_config_default."; |
| return WEBRTC_VIDEO_CODEC_ERROR; |
| } |
| |
| // Overwrite default config with input encoder settings & RTC-relevant values. |
| cfg_.g_w = encoder_settings_.width; |
| cfg_.g_h = encoder_settings_.height; |
| cfg_.g_threads = |
| NumberOfThreads(cfg_.g_w, cfg_.g_h, settings.number_of_cores); |
| cfg_.g_timebase.num = 1; |
| cfg_.g_timebase.den = kRtpTicksPerSecond; |
| cfg_.rc_target_bitrate = encoder_settings_.startBitrate; // kilobits/sec. |
| cfg_.rc_dropframe_thresh = |
| (!disable_frame_dropping_ && encoder_settings_.GetFrameDropEnabled()) ? 30 |
| : 0; |
| cfg_.g_input_bit_depth = kBitDepth; |
| cfg_.kf_mode = AOM_KF_DISABLED; |
| cfg_.rc_min_quantizer = kQpMin; |
| cfg_.rc_max_quantizer = encoder_settings_.qpMax; |
| cfg_.rc_undershoot_pct = 50; |
| cfg_.rc_overshoot_pct = 50; |
| cfg_.rc_buf_initial_sz = 600; |
| cfg_.rc_buf_optimal_sz = 600; |
| cfg_.rc_buf_sz = 1000; |
| cfg_.g_usage = kUsageProfile; |
| cfg_.g_error_resilient = 0; |
| // Low-latency settings. |
| cfg_.rc_end_usage = AOM_CBR; // Constant Bit Rate (CBR) mode |
| cfg_.g_pass = AOM_RC_ONE_PASS; // One-pass rate control |
| cfg_.g_lag_in_frames = kLagInFrames; // No look ahead when lag equals 0. |
| |
| if (frame_for_encode_ != nullptr) { |
| aom_img_free(frame_for_encode_); |
| frame_for_encode_ = nullptr; |
| } |
| |
| // Flag options: AOM_CODEC_USE_PSNR and AOM_CODEC_USE_HIGHBITDEPTH |
| aom_codec_flags_t flags = 0; |
| |
| // Initialize an encoder instance. |
| ret = aom_codec_enc_init(&ctx_, aom_codec_av1_cx(), &cfg_, flags); |
| if (ret != AOM_CODEC_OK) { |
| RTC_LOG(LS_WARNING) << "LibaomAv1Encoder::EncodeInit returned " << ret |
| << " on aom_codec_enc_init."; |
| return WEBRTC_VIDEO_CODEC_ERROR; |
| } |
| inited_ = true; |
| |
| // Set control parameters |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AOME_SET_CPUUSED, |
| GetCpuSpeed(cfg_.g_w, cfg_.g_h)); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_CDEF, 1); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_TPL_MODEL, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_DELTAQ_MODE, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_ORDER_HINT, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_AQ_MODE, 3); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AOME_SET_MAX_INTRA_BITRATE_PCT, 300); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_COEFF_COST_UPD_FREQ, 3); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_MODE_COST_UPD_FREQ, 3); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_MV_COST_UPD_FREQ, 3); |
| |
| if (codec_settings->mode == VideoCodecMode::kScreensharing) { |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_TUNE_CONTENT, |
| AOM_CONTENT_SCREEN); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_PALETTE, 1); |
| } else { |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_PALETTE, 0); |
| } |
| |
| if (cfg_.g_threads == 8) { |
| // Values passed to AV1E_SET_TILE_ROWS and AV1E_SET_TILE_COLUMNS are log2() |
| // based. |
| // Use 4 tile columns x 2 tile rows for 8 threads. |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_TILE_ROWS, 1); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_TILE_COLUMNS, 2); |
| } else if (cfg_.g_threads == 4) { |
| // Use 2 tile columns x 2 tile rows for 4 threads. |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_TILE_ROWS, 1); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_TILE_COLUMNS, 1); |
| } else { |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_TILE_COLUMNS, |
| static_cast<int>(log2(cfg_.g_threads))); |
| } |
| |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ROW_MT, 1); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_OBMC, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_NOISE_SENSITIVITY, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_WARPED_MOTION, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_GLOBAL_MOTION, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_REF_FRAME_MVS, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR( |
| AV1E_SET_SUPERBLOCK_SIZE, |
| GetSuperblockSize(cfg_.g_w, cfg_.g_h, cfg_.g_threads)); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_CFL_INTRA, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_SMOOTH_INTRA, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_ANGLE_DELTA, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_FILTER_INTRA, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_INTRA_DEFAULT_TX_ONLY, 1); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_DISABLE_TRELLIS_QUANT, 1); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_DIST_WTD_COMP, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_DIFF_WTD_COMP, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_DUAL_FILTER, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_INTERINTRA_COMP, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_INTERINTRA_WEDGE, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_INTRA_EDGE_FILTER, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_INTRABC, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_MASKED_COMP, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_PAETH_INTRA, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_QM, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_RECT_PARTITIONS, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_RESTORATION, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_SMOOTH_INTERINTRA, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_ENABLE_TX64, 0); |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AV1E_SET_MAX_REFERENCE_FRAMES, 3); |
| |
| return WEBRTC_VIDEO_CODEC_OK; |
| } |
| |
| template <typename P> |
| bool LibaomAv1Encoder::SetEncoderControlParameters(int param_id, |
| P param_value) { |
| aom_codec_err_t error_code = aom_codec_control(&ctx_, param_id, param_value); |
| if (error_code != AOM_CODEC_OK) { |
| RTC_LOG(LS_WARNING) |
| << "LibaomAv1Encoder::SetEncoderControlParameters returned " |
| << error_code << " on id: " << param_id << "."; |
| } |
| return error_code == AOM_CODEC_OK; |
| } |
| |
| // Only positive speeds, range for real-time coding currently is: 6 - 8. |
| // Lower means slower/better quality, higher means fastest/lower quality. |
| int LibaomAv1Encoder::GetCpuSpeed(int width, int height) { |
| if (aux_config_) { |
| if (auto it = aux_config_->max_pixel_count_to_cpu_speed.lower_bound(width * |
| height); |
| it != aux_config_->max_pixel_count_to_cpu_speed.end()) { |
| return it->second; |
| } |
| |
| return 10; |
| } else { |
| // For smaller resolutions, use lower speed setting (get some coding gain at |
| // the cost of increased encoding complexity). |
| switch (encoder_settings_.GetVideoEncoderComplexity()) { |
| case VideoCodecComplexity::kComplexityHigh: |
| if (width * height <= 320 * 180) |
| return 8; |
| else if (width * height <= 640 * 360) |
| return 9; |
| else |
| return 10; |
| case VideoCodecComplexity::kComplexityHigher: |
| if (width * height <= 320 * 180) |
| return 7; |
| else if (width * height <= 640 * 360) |
| return 8; |
| else if (width * height <= 1280 * 720) |
| return 9; |
| else |
| return 10; |
| case VideoCodecComplexity::kComplexityMax: |
| if (width * height <= 320 * 180) |
| return 6; |
| else if (width * height <= 640 * 360) |
| return 7; |
| else if (width * height <= 1280 * 720) |
| return 8; |
| else |
| return 9; |
| default: |
| return 10; |
| } |
| } |
| } |
| |
| int LibaomAv1Encoder::NumberOfThreads(int width, |
| int height, |
| int number_of_cores) { |
| // Keep the number of encoder threads equal to the possible number of |
| // column/row tiles, which is (1, 2, 4, 8). See comments below for |
| // AV1E_SET_TILE_COLUMNS/ROWS. |
| if (width * height > 1280 * 720 && number_of_cores > 8) { |
| return 8; |
| } else if (width * height >= 640 * 360 && number_of_cores > 4) { |
| return 4; |
| } else if (width * height >= 320 * 180 && number_of_cores > 2) { |
| return 2; |
| } else { |
| // Use 2 threads for low res on ARM. |
| #ifdef MOBILE_ARM |
| if (width * height >= 320 * 180 && number_of_cores > 2) { |
| return 2; |
| } |
| #endif |
| // 1 thread less than VGA. |
| return 1; |
| } |
| } |
| |
| bool LibaomAv1Encoder::SetSvcParams( |
| ScalableVideoController::StreamLayersConfig svc_config) { |
| bool svc_enabled = |
| svc_config.num_spatial_layers > 1 || svc_config.num_temporal_layers > 1; |
| if (!svc_enabled) { |
| svc_params_ = absl::nullopt; |
| return true; |
| } |
| if (svc_config.num_spatial_layers < 1 || svc_config.num_spatial_layers > 4) { |
| RTC_LOG(LS_WARNING) << "Av1 supports up to 4 spatial layers. " |
| << svc_config.num_spatial_layers << " configured."; |
| return false; |
| } |
| if (svc_config.num_temporal_layers < 1 || |
| svc_config.num_temporal_layers > 8) { |
| RTC_LOG(LS_WARNING) << "Av1 supports up to 8 temporal layers. " |
| << svc_config.num_temporal_layers << " configured."; |
| return false; |
| } |
| aom_svc_params_t& svc_params = svc_params_.emplace(); |
| svc_params.number_spatial_layers = svc_config.num_spatial_layers; |
| svc_params.number_temporal_layers = svc_config.num_temporal_layers; |
| |
| int num_layers = |
| svc_config.num_spatial_layers * svc_config.num_temporal_layers; |
| for (int i = 0; i < num_layers; ++i) { |
| svc_params.min_quantizers[i] = kQpMin; |
| svc_params.max_quantizers[i] = encoder_settings_.qpMax; |
| } |
| |
| // Assume each temporal layer doubles framerate. |
| for (int tid = 0; tid < svc_config.num_temporal_layers; ++tid) { |
| svc_params.framerate_factor[tid] = |
| 1 << (svc_config.num_temporal_layers - tid - 1); |
| } |
| |
| for (int sid = 0; sid < svc_config.num_spatial_layers; ++sid) { |
| svc_params.scaling_factor_num[sid] = svc_config.scaling_factor_num[sid]; |
| svc_params.scaling_factor_den[sid] = svc_config.scaling_factor_den[sid]; |
| } |
| |
| // svc_params.layer_target_bitrate is set in SetRates() before svc_params is |
| // passed to SetEncoderControlParameters(AV1E_SET_SVC_PARAMS). |
| |
| return true; |
| } |
| |
| void LibaomAv1Encoder::SetSvcLayerId( |
| const ScalableVideoController::LayerFrameConfig& layer_frame) { |
| aom_svc_layer_id_t layer_id = {}; |
| layer_id.spatial_layer_id = layer_frame.SpatialId(); |
| layer_id.temporal_layer_id = layer_frame.TemporalId(); |
| SetEncoderControlParameters(AV1E_SET_SVC_LAYER_ID, &layer_id); |
| } |
| |
| void LibaomAv1Encoder::SetSvcRefFrameConfig( |
| const ScalableVideoController::LayerFrameConfig& layer_frame) { |
| // Buffer name to use for each layer_frame.buffers position. In particular |
| // when there are 2 buffers are referenced, prefer name them last and golden, |
| // because av1 bitstream format has dedicated fields for these two names. |
| // See last_frame_idx and golden_frame_idx in the av1 spec |
| // https://aomediacodec.github.io/av1-spec/av1-spec.pdf |
| static constexpr int kPreferedSlotName[] = {0, // Last |
| 3, // Golden |
| 1, 2, 4, 5, 6}; |
| static constexpr int kAv1NumBuffers = 8; |
| |
| aom_svc_ref_frame_config_t ref_frame_config = {}; |
| RTC_CHECK_LE(layer_frame.Buffers().size(), ABSL_ARRAYSIZE(kPreferedSlotName)); |
| for (size_t i = 0; i < layer_frame.Buffers().size(); ++i) { |
| const CodecBufferUsage& buffer = layer_frame.Buffers()[i]; |
| int slot_name = kPreferedSlotName[i]; |
| RTC_CHECK_GE(buffer.id, 0); |
| RTC_CHECK_LT(buffer.id, kAv1NumBuffers); |
| ref_frame_config.ref_idx[slot_name] = buffer.id; |
| if (buffer.referenced) { |
| ref_frame_config.reference[slot_name] = 1; |
| } |
| if (buffer.updated) { |
| ref_frame_config.refresh[buffer.id] = 1; |
| } |
| } |
| |
| SetEncoderControlParameters(AV1E_SET_SVC_REF_FRAME_CONFIG, &ref_frame_config); |
| } |
| |
| int32_t LibaomAv1Encoder::RegisterEncodeCompleteCallback( |
| EncodedImageCallback* encoded_image_callback) { |
| encoded_image_callback_ = encoded_image_callback; |
| return WEBRTC_VIDEO_CODEC_OK; |
| } |
| |
| int32_t LibaomAv1Encoder::Release() { |
| if (frame_for_encode_ != nullptr) { |
| aom_img_free(frame_for_encode_); |
| frame_for_encode_ = nullptr; |
| } |
| if (inited_) { |
| if (aom_codec_destroy(&ctx_)) { |
| return WEBRTC_VIDEO_CODEC_MEMORY; |
| } |
| inited_ = false; |
| } |
| rates_configured_ = false; |
| return WEBRTC_VIDEO_CODEC_OK; |
| } |
| |
| void LibaomAv1Encoder::MaybeRewrapImgWithFormat(const aom_img_fmt_t fmt) { |
| if (!frame_for_encode_) { |
| frame_for_encode_ = |
| aom_img_wrap(nullptr, fmt, cfg_.g_w, cfg_.g_h, 1, nullptr); |
| |
| } else if (frame_for_encode_->fmt != fmt) { |
| RTC_LOG(LS_INFO) << "Switching AV1 encoder pixel format to " |
| << (fmt == AOM_IMG_FMT_NV12 ? "NV12" : "I420"); |
| aom_img_free(frame_for_encode_); |
| frame_for_encode_ = |
| aom_img_wrap(nullptr, fmt, cfg_.g_w, cfg_.g_h, 1, nullptr); |
| } |
| // else no-op since the image is already in the right format. |
| } |
| |
| int32_t LibaomAv1Encoder::Encode( |
| const VideoFrame& frame, |
| const std::vector<VideoFrameType>* frame_types) { |
| if (!inited_ || encoded_image_callback_ == nullptr || !rates_configured_) { |
| return WEBRTC_VIDEO_CODEC_UNINITIALIZED; |
| } |
| |
| bool keyframe_required = |
| frame_types != nullptr && |
| absl::c_linear_search(*frame_types, VideoFrameType::kVideoFrameKey); |
| |
| std::vector<ScalableVideoController::LayerFrameConfig> layer_frames = |
| svc_controller_->NextFrameConfig(keyframe_required); |
| |
| if (layer_frames.empty()) { |
| RTC_LOG(LS_ERROR) << "SVCController returned no configuration for a frame."; |
| return WEBRTC_VIDEO_CODEC_ERROR; |
| } |
| |
| rtc::scoped_refptr<VideoFrameBuffer> buffer = frame.video_frame_buffer(); |
| absl::InlinedVector<VideoFrameBuffer::Type, kMaxPreferredPixelFormats> |
| supported_formats = {VideoFrameBuffer::Type::kI420, |
| VideoFrameBuffer::Type::kNV12}; |
| rtc::scoped_refptr<VideoFrameBuffer> mapped_buffer; |
| if (buffer->type() != VideoFrameBuffer::Type::kNative) { |
| // `buffer` is already mapped. |
| mapped_buffer = buffer; |
| } else { |
| // Attempt to map to one of the supported formats. |
| mapped_buffer = buffer->GetMappedFrameBuffer(supported_formats); |
| } |
| |
| // Convert input frame to I420, if needed. |
| if (!mapped_buffer || |
| (absl::c_find(supported_formats, mapped_buffer->type()) == |
| supported_formats.end() && |
| mapped_buffer->type() != VideoFrameBuffer::Type::kI420A)) { |
| rtc::scoped_refptr<I420BufferInterface> converted_buffer(buffer->ToI420()); |
| if (!converted_buffer) { |
| RTC_LOG(LS_ERROR) << "Failed to convert " |
| << VideoFrameBufferTypeToString( |
| frame.video_frame_buffer()->type()) |
| << " image to I420. Can't encode frame."; |
| return WEBRTC_VIDEO_CODEC_ENCODER_FAILURE; |
| } |
| RTC_CHECK(converted_buffer->type() == VideoFrameBuffer::Type::kI420 || |
| converted_buffer->type() == VideoFrameBuffer::Type::kI420A); |
| |
| mapped_buffer = converted_buffer; |
| } |
| |
| switch (mapped_buffer->type()) { |
| case VideoFrameBuffer::Type::kI420: |
| case VideoFrameBuffer::Type::kI420A: { |
| // Set frame_for_encode_ data pointers and strides. |
| MaybeRewrapImgWithFormat(AOM_IMG_FMT_I420); |
| auto i420_buffer = mapped_buffer->GetI420(); |
| RTC_DCHECK(i420_buffer); |
| frame_for_encode_->planes[AOM_PLANE_Y] = |
| const_cast<unsigned char*>(i420_buffer->DataY()); |
| frame_for_encode_->planes[AOM_PLANE_U] = |
| const_cast<unsigned char*>(i420_buffer->DataU()); |
| frame_for_encode_->planes[AOM_PLANE_V] = |
| const_cast<unsigned char*>(i420_buffer->DataV()); |
| frame_for_encode_->stride[AOM_PLANE_Y] = i420_buffer->StrideY(); |
| frame_for_encode_->stride[AOM_PLANE_U] = i420_buffer->StrideU(); |
| frame_for_encode_->stride[AOM_PLANE_V] = i420_buffer->StrideV(); |
| break; |
| } |
| case VideoFrameBuffer::Type::kNV12: { |
| MaybeRewrapImgWithFormat(AOM_IMG_FMT_NV12); |
| const NV12BufferInterface* nv12_buffer = mapped_buffer->GetNV12(); |
| RTC_DCHECK(nv12_buffer); |
| frame_for_encode_->planes[AOM_PLANE_Y] = |
| const_cast<unsigned char*>(nv12_buffer->DataY()); |
| frame_for_encode_->planes[AOM_PLANE_U] = |
| const_cast<unsigned char*>(nv12_buffer->DataUV()); |
| frame_for_encode_->planes[AOM_PLANE_V] = nullptr; |
| frame_for_encode_->stride[AOM_PLANE_Y] = nv12_buffer->StrideY(); |
| frame_for_encode_->stride[AOM_PLANE_U] = nv12_buffer->StrideUV(); |
| frame_for_encode_->stride[AOM_PLANE_V] = 0; |
| break; |
| } |
| default: |
| return WEBRTC_VIDEO_CODEC_ENCODER_FAILURE; |
| } |
| |
| const uint32_t duration = |
| kRtpTicksPerSecond / static_cast<float>(encoder_settings_.maxFramerate); |
| timestamp_ += duration; |
| |
| const size_t num_spatial_layers = |
| svc_params_ ? svc_params_->number_spatial_layers : 1; |
| auto next_layer_frame = layer_frames.begin(); |
| for (size_t i = 0; i < num_spatial_layers; ++i) { |
| // The libaom AV1 encoder requires that `aom_codec_encode` is called for |
| // every spatial layer, even if the configured bitrate for that layer is |
| // zero. For zero bitrate spatial layers no frames will be produced. |
| absl::optional<ScalableVideoController::LayerFrameConfig> |
| non_encoded_layer_frame; |
| ScalableVideoController::LayerFrameConfig* layer_frame; |
| if (next_layer_frame != layer_frames.end() && |
| next_layer_frame->SpatialId() == static_cast<int>(i)) { |
| layer_frame = &*next_layer_frame; |
| ++next_layer_frame; |
| } else { |
| // For layers that are not encoded only the spatial id matters. |
| non_encoded_layer_frame.emplace().S(i); |
| layer_frame = &*non_encoded_layer_frame; |
| } |
| const bool end_of_picture = (next_layer_frame == layer_frames.end()); |
| |
| aom_enc_frame_flags_t flags = |
| layer_frame->IsKeyframe() ? AOM_EFLAG_FORCE_KF : 0; |
| |
| if (SvcEnabled()) { |
| SetSvcLayerId(*layer_frame); |
| SetSvcRefFrameConfig(*layer_frame); |
| } |
| |
| // Encode a frame. The presentation timestamp `pts` should not use real |
| // timestamps from frames or the wall clock, as that can cause the rate |
| // controller to misbehave. |
| aom_codec_err_t ret = |
| aom_codec_encode(&ctx_, frame_for_encode_, timestamp_, duration, flags); |
| if (ret != AOM_CODEC_OK) { |
| RTC_LOG(LS_WARNING) << "LibaomAv1Encoder::Encode returned " << ret |
| << " on aom_codec_encode."; |
| return WEBRTC_VIDEO_CODEC_ERROR; |
| } |
| |
| if (non_encoded_layer_frame) { |
| continue; |
| } |
| |
| // Get encoded image data. |
| EncodedImage encoded_image; |
| aom_codec_iter_t iter = nullptr; |
| int data_pkt_count = 0; |
| while (const aom_codec_cx_pkt_t* pkt = |
| aom_codec_get_cx_data(&ctx_, &iter)) { |
| if (pkt->kind == AOM_CODEC_CX_FRAME_PKT && pkt->data.frame.sz > 0) { |
| if (data_pkt_count > 0) { |
| RTC_LOG(LS_WARNING) << "LibaomAv1Encoder::Encoder returned more than " |
| "one data packet for an input video frame."; |
| Release(); |
| } |
| encoded_image.SetEncodedData(EncodedImageBuffer::Create( |
| /*data=*/static_cast<const uint8_t*>(pkt->data.frame.buf), |
| /*size=*/pkt->data.frame.sz)); |
| |
| if ((pkt->data.frame.flags & AOM_EFLAG_FORCE_KF) != 0) { |
| layer_frame->Keyframe(); |
| } |
| |
| encoded_image._frameType = layer_frame->IsKeyframe() |
| ? VideoFrameType::kVideoFrameKey |
| : VideoFrameType::kVideoFrameDelta; |
| encoded_image.SetRtpTimestamp(frame.timestamp()); |
| encoded_image.SetCaptureTimeIdentifier(frame.capture_time_identifier()); |
| encoded_image.capture_time_ms_ = frame.render_time_ms(); |
| encoded_image.rotation_ = frame.rotation(); |
| encoded_image.content_type_ = VideoContentType::UNSPECIFIED; |
| // If encoded image width/height info are added to aom_codec_cx_pkt_t, |
| // use those values in lieu of the values in frame. |
| if (svc_params_) { |
| int n = svc_params_->scaling_factor_num[layer_frame->SpatialId()]; |
| int d = svc_params_->scaling_factor_den[layer_frame->SpatialId()]; |
| encoded_image._encodedWidth = cfg_.g_w * n / d; |
| encoded_image._encodedHeight = cfg_.g_h * n / d; |
| encoded_image.SetSpatialIndex(layer_frame->SpatialId()); |
| encoded_image.SetTemporalIndex(layer_frame->TemporalId()); |
| } else { |
| encoded_image._encodedWidth = cfg_.g_w; |
| encoded_image._encodedHeight = cfg_.g_h; |
| } |
| encoded_image.timing_.flags = VideoSendTiming::kInvalid; |
| |
| int qp = -1; |
| SET_ENCODER_PARAM_OR_RETURN_ERROR(AOME_GET_LAST_QUANTIZER, &qp); |
| encoded_image.qp_ = qp; |
| |
| encoded_image.SetColorSpace(frame.color_space()); |
| ++data_pkt_count; |
| } |
| } |
| |
| // Deliver encoded image data. |
| if (encoded_image.size() > 0) { |
| CodecSpecificInfo codec_specific_info; |
| codec_specific_info.codecType = kVideoCodecAV1; |
| codec_specific_info.end_of_picture = end_of_picture; |
| codec_specific_info.scalability_mode = scalability_mode_; |
| bool is_keyframe = layer_frame->IsKeyframe(); |
| codec_specific_info.generic_frame_info = |
| svc_controller_->OnEncodeDone(*layer_frame); |
| if (is_keyframe && codec_specific_info.generic_frame_info) { |
| codec_specific_info.template_structure = |
| svc_controller_->DependencyStructure(); |
| auto& resolutions = codec_specific_info.template_structure->resolutions; |
| if (SvcEnabled()) { |
| resolutions.resize(svc_params_->number_spatial_layers); |
| for (int sid = 0; sid < svc_params_->number_spatial_layers; ++sid) { |
| int n = svc_params_->scaling_factor_num[sid]; |
| int d = svc_params_->scaling_factor_den[sid]; |
| resolutions[sid] = |
| RenderResolution(cfg_.g_w * n / d, cfg_.g_h * n / d); |
| } |
| } else { |
| resolutions = {RenderResolution(cfg_.g_w, cfg_.g_h)}; |
| } |
| } |
| encoded_image_callback_->OnEncodedImage(encoded_image, |
| &codec_specific_info); |
| } |
| } |
| |
| return WEBRTC_VIDEO_CODEC_OK; |
| } |
| |
| void LibaomAv1Encoder::SetRates(const RateControlParameters& parameters) { |
| if (!inited_) { |
| RTC_LOG(LS_WARNING) << "SetRates() while encoder is not initialized"; |
| return; |
| } |
| if (parameters.framerate_fps < kMinimumFrameRate) { |
| RTC_LOG(LS_WARNING) << "Unsupported framerate (must be >= " |
| << kMinimumFrameRate |
| << " ): " << parameters.framerate_fps; |
| return; |
| } |
| if (parameters.bitrate.get_sum_bps() == 0) { |
| RTC_LOG(LS_WARNING) << "Attempt to set target bit rate to zero"; |
| return; |
| } |
| |
| // The bitrates caluclated internally in libaom when `AV1E_SET_SVC_PARAMS` is |
| // called depends on the currently configured `rc_target_bitrate`. If the |
| // total target bitrate is not updated first a division by zero could happen. |
| svc_controller_->OnRatesUpdated(parameters.bitrate); |
| cfg_.rc_target_bitrate = parameters.bitrate.get_sum_kbps(); |
| aom_codec_err_t error_code = aom_codec_enc_config_set(&ctx_, &cfg_); |
| if (error_code != AOM_CODEC_OK) { |
| RTC_LOG(LS_WARNING) << "Error configuring encoder, error code: " |
| << error_code; |
| } |
| |
| if (SvcEnabled()) { |
| for (int sid = 0; sid < svc_params_->number_spatial_layers; ++sid) { |
| // libaom bitrate for spatial id S and temporal id T means bitrate |
| // of frames with spatial_id=S and temporal_id<=T |
| // while `parameters.bitrate` provdies bitrate of frames with |
| // spatial_id=S and temporal_id=T |
| int accumulated_bitrate_bps = 0; |
| for (int tid = 0; tid < svc_params_->number_temporal_layers; ++tid) { |
| int layer_index = sid * svc_params_->number_temporal_layers + tid; |
| accumulated_bitrate_bps += parameters.bitrate.GetBitrate(sid, tid); |
| // `svc_params_->layer_target_bitrate` expects bitrate in kbps. |
| svc_params_->layer_target_bitrate[layer_index] = |
| accumulated_bitrate_bps / 1000; |
| } |
| } |
| SetEncoderControlParameters(AV1E_SET_SVC_PARAMS, &*svc_params_); |
| } |
| |
| rates_configured_ = true; |
| |
| // Set frame rate to closest integer value. |
| encoder_settings_.maxFramerate = |
| static_cast<uint32_t>(parameters.framerate_fps + 0.5); |
| } |
| |
| VideoEncoder::EncoderInfo LibaomAv1Encoder::GetEncoderInfo() const { |
| EncoderInfo info; |
| info.supports_native_handle = false; |
| info.implementation_name = "libaom"; |
| info.has_trusted_rate_controller = true; |
| info.is_hardware_accelerated = false; |
| info.scaling_settings = |
| (inited_ && !encoder_settings_.AV1().automatic_resize_on) |
| ? VideoEncoder::ScalingSettings::kOff |
| : VideoEncoder::ScalingSettings(kMinQindex, kMaxQindex); |
| info.preferred_pixel_formats = {VideoFrameBuffer::Type::kI420, |
| VideoFrameBuffer::Type::kNV12}; |
| if (SvcEnabled()) { |
| for (int sid = 0; sid < svc_params_->number_spatial_layers; ++sid) { |
| info.fps_allocation[sid].resize(svc_params_->number_temporal_layers); |
| for (int tid = 0; tid < svc_params_->number_temporal_layers; ++tid) { |
| info.fps_allocation[sid][tid] = EncoderInfo::kMaxFramerateFraction / |
| svc_params_->framerate_factor[tid]; |
| } |
| } |
| } |
| if (!encoder_info_override_.resolution_bitrate_limits().empty()) { |
| info.resolution_bitrate_limits = |
| encoder_info_override_.resolution_bitrate_limits(); |
| } |
| return info; |
| } |
| |
| } // namespace |
| |
| std::unique_ptr<VideoEncoder> CreateLibaomAv1Encoder() { |
| return std::make_unique<LibaomAv1Encoder>(absl::nullopt, |
| FieldTrialBasedConfig()); |
| } |
| |
| std::unique_ptr<VideoEncoder> CreateLibaomAv1Encoder( |
| const LibaomAv1EncoderAuxConfig& aux_config) { |
| return std::make_unique<LibaomAv1Encoder>(aux_config, |
| FieldTrialBasedConfig()); |
| } |
| |
| } // namespace webrtc |
