| /* |
| * Copyright (c) 2014 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. |
| * |
| */ |
| |
| #ifndef WEBRTC_MEDIA_ENGINE_SIMULCAST_ENCODER_ADAPTER_H_ |
| #define WEBRTC_MEDIA_ENGINE_SIMULCAST_ENCODER_ADAPTER_H_ |
| |
| #include <memory> |
| #include <stack> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "webrtc/media/engine/webrtcvideoencoderfactory.h" |
| #include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h" |
| #include "webrtc/rtc_base/atomicops.h" |
| #include "webrtc/rtc_base/sequenced_task_checker.h" |
| |
| namespace webrtc { |
| |
| class SimulcastRateAllocator; |
| |
| // SimulcastEncoderAdapter implements simulcast support by creating multiple |
| // webrtc::VideoEncoder instances with the given VideoEncoderFactory. |
| // The object is created and destroyed on the worker thread, but all public |
| // interfaces should be called from the encoder task queue. |
| class SimulcastEncoderAdapter : public VP8Encoder { |
| public: |
| explicit SimulcastEncoderAdapter(cricket::WebRtcVideoEncoderFactory* factory); |
| virtual ~SimulcastEncoderAdapter(); |
| |
| // Implements VideoEncoder. |
| int Release() override; |
| int InitEncode(const VideoCodec* inst, |
| int number_of_cores, |
| size_t max_payload_size) override; |
| int Encode(const VideoFrame& input_image, |
| const CodecSpecificInfo* codec_specific_info, |
| const std::vector<FrameType>* frame_types) override; |
| int RegisterEncodeCompleteCallback(EncodedImageCallback* callback) override; |
| int SetChannelParameters(uint32_t packet_loss, int64_t rtt) override; |
| int SetRateAllocation(const BitrateAllocation& bitrate, |
| uint32_t new_framerate) override; |
| |
| // Eventual handler for the contained encoders' EncodedImageCallbacks, but |
| // called from an internal helper that also knows the correct stream |
| // index. |
| EncodedImageCallback::Result OnEncodedImage( |
| size_t stream_idx, |
| const EncodedImage& encoded_image, |
| const CodecSpecificInfo* codec_specific_info, |
| const RTPFragmentationHeader* fragmentation); |
| |
| VideoEncoder::ScalingSettings GetScalingSettings() const override; |
| |
| bool SupportsNativeHandle() const override; |
| const char* ImplementationName() const override; |
| |
| private: |
| struct StreamInfo { |
| StreamInfo(std::unique_ptr<VideoEncoder> encoder, |
| std::unique_ptr<EncodedImageCallback> callback, |
| uint16_t width, |
| uint16_t height, |
| bool send_stream) |
| : encoder(std::move(encoder)), |
| callback(std::move(callback)), |
| width(width), |
| height(height), |
| key_frame_request(false), |
| send_stream(send_stream) {} |
| std::unique_ptr<VideoEncoder> encoder; |
| std::unique_ptr<EncodedImageCallback> callback; |
| uint16_t width; |
| uint16_t height; |
| bool key_frame_request; |
| bool send_stream; |
| }; |
| |
| // Populate the codec settings for each simulcast stream. |
| static void PopulateStreamCodec(const webrtc::VideoCodec& inst, |
| int stream_index, |
| uint32_t start_bitrate_kbps, |
| bool highest_resolution_stream, |
| webrtc::VideoCodec* stream_codec); |
| |
| bool Initialized() const; |
| |
| void DestroyStoredEncoders(); |
| |
| volatile int inited_; // Accessed atomically. |
| cricket::WebRtcVideoEncoderFactory* const factory_; |
| VideoCodec codec_; |
| std::vector<StreamInfo> streaminfos_; |
| EncodedImageCallback* encoded_complete_callback_; |
| std::string implementation_name_; |
| |
| // Used for checking the single-threaded access of the encoder interface. |
| rtc::SequencedTaskChecker encoder_queue_; |
| |
| // Store encoders in between calls to Release and InitEncode, so they don't |
| // have to be recreated. Remaining encoders are destroyed by the destructor. |
| std::stack<std::unique_ptr<VideoEncoder>> stored_encoders_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MEDIA_ENGINE_SIMULCAST_ENCODER_ADAPTER_H_ |