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Add VideoReaderDecoder GPU (NVIDIA#3668)
* Add VideoReaderDecoderGpu op Signed-off-by: Albert Wolant <awolant@nvidia.com>
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124 changes: 124 additions & 0 deletions
124
dali/operators/reader/loader/video/video_loader_decoder_gpu.cc
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| // Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #include "dali/operators/reader/loader/video/video_loader_decoder_gpu.h" | ||
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| #include "dali/util/nvml.h" | ||
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| namespace dali { | ||
| void VideoSampleGpu::Decode() { | ||
| TensorShape<4> shape = { | ||
| sequence_len_, | ||
| video_file_->Height(), | ||
| video_file_->Width(), | ||
| video_file_->Channels()}; | ||
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| data_.Resize( | ||
| shape, | ||
| DALIDataType::DALI_UINT8); | ||
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| for (int i = 0; i < sequence_len_; ++i) { | ||
| int frame_id = span_->start_ + i * span_->stride_; | ||
| video_file_->SeekFrame(frame_id); | ||
| video_file_->ReadNextFrame( | ||
| static_cast<uint8_t *>(data_.raw_mutable_data()) + i * video_file_->FrameSize()); | ||
| } | ||
| } | ||
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| VideoLoaderDecoderGpu::~VideoLoaderDecoderGpu() { | ||
| CUDA_DTOR_CALL(cudaStreamDestroy(cuda_stream_)); | ||
| } | ||
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| cudaStream_t VideoLoaderDecoderGpu::GetCudaStream() { | ||
| #if NVML_ENABLED | ||
| { | ||
| nvml::Init(); | ||
| static float driver_version = nvml::GetDriverVersion(); | ||
| if (driver_version > 460 && driver_version < 470.21) { | ||
| DALI_WARN_ONCE("Warning: Decoding on a default stream. Performance may be affected."); | ||
| return 0; | ||
| } | ||
| } | ||
| #else | ||
| { | ||
| int driver_cuda_version = 0; | ||
| CUDA_CALL(cuDriverGetVersion(&driver_cuda_version)); | ||
| if (driver_cuda_version >= 11030 && driver_cuda_version < 11040) { | ||
| DALI_WARN_ONCE("Warning: Decoding on a default stream. Performance may be affected."); | ||
| return 0; | ||
| } | ||
| } | ||
| #endif | ||
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| // TODO(awolant): Check per decoder stream | ||
| cudaStream_t stream; | ||
| DeviceGuard dg(device_id_); | ||
| CUDA_CALL(cudaStreamCreateWithFlags(&stream, cudaStreamNonBlocking)); | ||
| return stream; | ||
| } | ||
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| void VideoLoaderDecoderGpu::PrepareEmpty(VideoSampleGpu &sample) { | ||
| sample = {}; | ||
| } | ||
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| void VideoLoaderDecoderGpu::ReadSample(VideoSampleGpu &sample) { | ||
| auto &sample_span = sample_spans_[current_index_]; | ||
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| // Bind sample to the video and span, so it can be decoded later | ||
| sample.span_ = &sample_span; | ||
| sample.video_file_ = &video_files_[sample_span.video_idx_]; | ||
| sample.sequence_len_ = sequence_len_; | ||
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| if (has_labels_) { | ||
| sample.label_ = labels_[sample_span.video_idx_]; | ||
| } | ||
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| ++current_index_; | ||
| MoveToNextShard(current_index_); | ||
| } | ||
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| Index VideoLoaderDecoderGpu::SizeImpl() { | ||
| return sample_spans_.size(); | ||
| } | ||
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| void VideoLoaderDecoderGpu::PrepareMetadataImpl() { | ||
| video_files_.reserve(filenames_.size()); | ||
| for (auto &filename : filenames_) { | ||
| video_files_.emplace_back(filename, cuda_stream_); | ||
| } | ||
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| for (size_t video_idx = 0; video_idx < video_files_.size(); ++video_idx) { | ||
| for (int start = 0; | ||
| start + stride_ * sequence_len_ <= video_files_[video_idx].NumFrames(); | ||
| start += step_) { | ||
| sample_spans_.push_back( | ||
| VideoSampleDesc(start, start + stride_ * sequence_len_, stride_, video_idx)); | ||
| } | ||
| } | ||
| if (shuffle_) { | ||
| // seeded with hardcoded value to get | ||
| // the same sequence on every shard | ||
| std::mt19937 g(kDaliDataloaderSeed); | ||
| std::shuffle(std::begin(sample_spans_), std::end(sample_spans_), g); | ||
| } | ||
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| // set the initial index for each shard | ||
| Reset(true); | ||
| } | ||
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| void VideoLoaderDecoderGpu::Reset(bool wrap_to_shard) { | ||
| current_index_ = wrap_to_shard ? start_index(shard_id_, num_shards_, SizeImpl()) : 0; | ||
| } | ||
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| } // namespace dali |
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dali/operators/reader/loader/video/video_loader_decoder_gpu.h
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| // Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #ifndef DALI_OPERATORS_READER_LOADER_VIDEO_VIDEO_LOADER_DECODER_GPU_H_ | ||
| #define DALI_OPERATORS_READER_LOADER_VIDEO_VIDEO_LOADER_DECODER_GPU_H_ | ||
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| #include <string> | ||
| #include <vector> | ||
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| #include "dali/operators/reader/loader/loader.h" | ||
| #include "dali/operators/reader/loader/video/video_loader_decoder_cpu.h" | ||
| #include "dali/operators/reader/loader/video/frames_decoder_gpu.h" | ||
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| namespace dali { | ||
| class VideoSampleGpu { | ||
| public: | ||
| void Decode(); | ||
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| FramesDecoderGpu *video_file_ = nullptr; | ||
| VideoSampleDesc *span_ = nullptr; | ||
| int sequence_len_ = 0; | ||
| Tensor<GPUBackend> data_; | ||
| int label_ = -1; | ||
| }; | ||
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| class VideoLoaderDecoderGpu : public Loader<GPUBackend, VideoSampleGpu> { | ||
| public: | ||
| explicit inline VideoLoaderDecoderGpu(const OpSpec &spec) : | ||
| Loader<GPUBackend, VideoSampleGpu>(spec), | ||
| filenames_(spec.GetRepeatedArgument<std::string>("filenames")), | ||
| sequence_len_(spec.GetArgument<int>("sequence_length")), | ||
| stride_(spec.GetArgument<int>("stride")), | ||
| step_(spec.GetArgument<int>("step")), | ||
| cuda_stream_(GetCudaStream()) { | ||
| if (step_ <= 0) { | ||
| step_ = stride_ * sequence_len_; | ||
| } | ||
| has_labels_ = spec.TryGetRepeatedArgument(labels_, "labels"); | ||
| } | ||
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| void ReadSample(VideoSampleGpu &sample) override; | ||
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| void PrepareEmpty(VideoSampleGpu &sample) override; | ||
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| ~VideoLoaderDecoderGpu(); | ||
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| protected: | ||
| Index SizeImpl() override; | ||
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| void PrepareMetadataImpl() override; | ||
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| private: | ||
| void Reset(bool wrap_to_shard) override; | ||
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| cudaStream_t GetCudaStream(); | ||
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| std::vector<std::string> filenames_; | ||
| std::vector<int> labels_; | ||
| bool has_labels_ = false; | ||
| std::vector<FramesDecoderGpu> video_files_; | ||
| std::vector<VideoSampleDesc> sample_spans_; | ||
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| Index current_index_ = 0; | ||
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| int sequence_len_; | ||
| int stride_; | ||
| int step_; | ||
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| cudaStream_t cuda_stream_; | ||
| }; | ||
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| } // namespace dali | ||
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| #endif // DALI_OPERATORS_READER_LOADER_VIDEO_VIDEO_LOADER_DECODER_GPU_H_ |
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