blob: 03576f65878abd3ae6a3e14f66e673d04651771f [file] [log] [blame]
* 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.
#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 {
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;
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)),
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