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/*
* Copyright (c) 2012 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/video_coding_impl.h"
#include <algorithm>
#include <utility>
#include "common_types.h" // NOLINT(build/include)
#include "common_video/include/video_bitrate_allocator.h"
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "modules/video_coding/codecs/vp8/temporal_layers.h"
#include "modules/video_coding/encoded_frame.h"
#include "modules/video_coding/include/video_codec_initializer.h"
#include "modules/video_coding/include/video_codec_interface.h"
#include "modules/video_coding/jitter_buffer.h"
#include "modules/video_coding/packet.h"
#include "modules/video_coding/timing.h"
#include "rtc_base/criticalsection.h"
#include "rtc_base/thread_checker.h"
#include "system_wrappers/include/clock.h"
namespace webrtc {
namespace vcm {
int64_t VCMProcessTimer::Period() const {
return _periodMs;
}
int64_t VCMProcessTimer::TimeUntilProcess() const {
const int64_t time_since_process = _clock->TimeInMilliseconds() - _latestMs;
const int64_t time_until_process = _periodMs - time_since_process;
return std::max<int64_t>(time_until_process, 0);
}
void VCMProcessTimer::Processed() {
_latestMs = _clock->TimeInMilliseconds();
}
} // namespace vcm
namespace {
// This wrapper provides a way to modify the callback without the need to expose
// a register method all the way down to the function calling it.
class EncodedImageCallbackWrapper : public EncodedImageCallback {
public:
EncodedImageCallbackWrapper() : callback_(nullptr) {}
virtual ~EncodedImageCallbackWrapper() {}
void Register(EncodedImageCallback* callback) {
rtc::CritScope lock(&cs_);
callback_ = callback;
}
virtual Result OnEncodedImage(const EncodedImage& encoded_image,
const CodecSpecificInfo* codec_specific_info,
const RTPFragmentationHeader* fragmentation) {
rtc::CritScope lock(&cs_);
if (callback_) {
return callback_->OnEncodedImage(encoded_image, codec_specific_info,
fragmentation);
}
return Result(Result::ERROR_SEND_FAILED);
}
private:
rtc::CriticalSection cs_;
EncodedImageCallback* callback_ RTC_GUARDED_BY(cs_);
};
class VideoCodingModuleImpl : public VideoCodingModule {
public:
VideoCodingModuleImpl(Clock* clock,
EventFactory* event_factory,
NackSender* nack_sender,
KeyFrameRequestSender* keyframe_request_sender,
EncodedImageCallback* pre_decode_image_callback)
: VideoCodingModule(),
sender_(clock, &post_encode_callback_),
timing_(new VCMTiming(clock)),
receiver_(clock,
event_factory,
pre_decode_image_callback,
timing_.get(),
nack_sender,
keyframe_request_sender) {}
virtual ~VideoCodingModuleImpl() {}
int64_t TimeUntilNextProcess() override {
int64_t receiver_time = receiver_.TimeUntilNextProcess();
RTC_DCHECK_GE(receiver_time, 0);
return receiver_time;
}
void Process() override {
receiver_.Process();
}
int32_t RegisterSendCodec(const VideoCodec* sendCodec,
uint32_t numberOfCores,
uint32_t maxPayloadSize) override {
if (sendCodec != nullptr && sendCodec->codecType == kVideoCodecVP8) {
// Set up a rate allocator and temporal layers factory for this vp8
// instance. The codec impl will have a raw pointer to the TL factory,
// and will call it when initializing. Since this can happen
// asynchronously keep the instance alive until destruction or until a
// new send codec is registered.
VideoCodec vp8_codec = *sendCodec;
std::unique_ptr<TemporalLayersFactory> tl_factory(
new TemporalLayersFactory());
vp8_codec.VP8()->tl_factory = tl_factory.get();
rate_allocator_ = VideoCodecInitializer::CreateBitrateAllocator(
vp8_codec, std::move(tl_factory));
return sender_.RegisterSendCodec(&vp8_codec, numberOfCores,
maxPayloadSize);
}
return sender_.RegisterSendCodec(sendCodec, numberOfCores, maxPayloadSize);
}
int32_t RegisterExternalEncoder(VideoEncoder* externalEncoder,
uint8_t payloadType,
bool internalSource) override {
sender_.RegisterExternalEncoder(externalEncoder, payloadType,
internalSource);
return 0;
}
int Bitrate(unsigned int* bitrate) const override {
return sender_.Bitrate(bitrate);
}
int FrameRate(unsigned int* framerate) const override {
return sender_.FrameRate(framerate);
}
int32_t SetChannelParameters(uint32_t target_bitrate, // bits/s.
uint8_t lossRate,
int64_t rtt) override {
return sender_.SetChannelParameters(target_bitrate, lossRate, rtt,
rate_allocator_.get(), nullptr);
}
int32_t RegisterProtectionCallback(
VCMProtectionCallback* protection) override {
return sender_.RegisterProtectionCallback(protection);
}
int32_t SetVideoProtection(VCMVideoProtection videoProtection,
bool enable) override {
// TODO(pbos): Remove enable from receive-side protection modes as well.
return receiver_.SetVideoProtection(videoProtection, enable);
}
int32_t AddVideoFrame(const VideoFrame& videoFrame,
const CodecSpecificInfo* codecSpecificInfo) override {
return sender_.AddVideoFrame(videoFrame, codecSpecificInfo);
}
int32_t IntraFrameRequest(size_t stream_index) override {
return sender_.IntraFrameRequest(stream_index);
}
int32_t EnableFrameDropper(bool enable) override {
return sender_.EnableFrameDropper(enable);
}
int32_t RegisterReceiveCodec(const VideoCodec* receiveCodec,
int32_t numberOfCores,
bool requireKeyFrame) override {
return receiver_.RegisterReceiveCodec(receiveCodec, numberOfCores,
requireKeyFrame);
}
void RegisterExternalDecoder(VideoDecoder* externalDecoder,
uint8_t payloadType) override {
receiver_.RegisterExternalDecoder(externalDecoder, payloadType);
}
int32_t RegisterReceiveCallback(
VCMReceiveCallback* receiveCallback) override {
RTC_DCHECK(construction_thread_.CalledOnValidThread());
return receiver_.RegisterReceiveCallback(receiveCallback);
}
int32_t RegisterReceiveStatisticsCallback(
VCMReceiveStatisticsCallback* receiveStats) override {
return receiver_.RegisterReceiveStatisticsCallback(receiveStats);
}
int32_t RegisterFrameTypeCallback(
VCMFrameTypeCallback* frameTypeCallback) override {
return receiver_.RegisterFrameTypeCallback(frameTypeCallback);
}
int32_t RegisterPacketRequestCallback(
VCMPacketRequestCallback* callback) override {
RTC_DCHECK(construction_thread_.CalledOnValidThread());
return receiver_.RegisterPacketRequestCallback(callback);
}
int32_t Decode(uint16_t maxWaitTimeMs) override {
return receiver_.Decode(maxWaitTimeMs);
}
int32_t IncomingPacket(const uint8_t* incomingPayload,
size_t payloadLength,
const WebRtcRTPHeader& rtpInfo) override {
return receiver_.IncomingPacket(incomingPayload, payloadLength, rtpInfo);
}
int32_t SetMinimumPlayoutDelay(uint32_t minPlayoutDelayMs) override {
return receiver_.SetMinimumPlayoutDelay(minPlayoutDelayMs);
}
int32_t SetRenderDelay(uint32_t timeMS) override {
return receiver_.SetRenderDelay(timeMS);
}
int32_t Delay() const override { return receiver_.Delay(); }
int SetReceiverRobustnessMode(ReceiverRobustness robustnessMode,
VCMDecodeErrorMode errorMode) override {
return receiver_.SetReceiverRobustnessMode(robustnessMode, errorMode);
}
void SetNackSettings(size_t max_nack_list_size,
int max_packet_age_to_nack,
int max_incomplete_time_ms) override {
return receiver_.SetNackSettings(max_nack_list_size, max_packet_age_to_nack,
max_incomplete_time_ms);
}
void SetDecodeErrorMode(VCMDecodeErrorMode decode_error_mode) override {
return receiver_.SetDecodeErrorMode(decode_error_mode);
}
int SetMinReceiverDelay(int desired_delay_ms) override {
return receiver_.SetMinReceiverDelay(desired_delay_ms);
}
int32_t SetReceiveChannelParameters(int64_t rtt) override {
return receiver_.SetReceiveChannelParameters(rtt);
}
void RegisterPostEncodeImageCallback(
EncodedImageCallback* observer) override {
post_encode_callback_.Register(observer);
}
void TriggerDecoderShutdown() override { receiver_.TriggerDecoderShutdown(); }
private:
rtc::ThreadChecker construction_thread_;
EncodedImageCallbackWrapper post_encode_callback_;
vcm::VideoSender sender_;
std::unique_ptr<VideoBitrateAllocator> rate_allocator_;
std::unique_ptr<VCMTiming> timing_;
vcm::VideoReceiver receiver_;
};
} // namespace
// DEPRECATED. Create method for current interface, will be removed when the
// new jitter buffer is in place.
VideoCodingModule* VideoCodingModule::Create(Clock* clock,
EventFactory* event_factory) {
RTC_DCHECK(clock);
RTC_DCHECK(event_factory);
return new VideoCodingModuleImpl(clock, event_factory, nullptr, nullptr,
nullptr);
}
} // namespace webrtc