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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 "webrtc/video/video_stream_decoder.h"
#include <algorithm>
#include <map>
#include <vector>
#include "webrtc/common_video/include/frame_callback.h"
#include "webrtc/modules/video_coding/video_coding_impl.h"
#include "webrtc/rtc_base/checks.h"
#include "webrtc/rtc_base/logging.h"
#include "webrtc/system_wrappers/include/metrics.h"
#include "webrtc/video/call_stats.h"
#include "webrtc/video/payload_router.h"
#include "webrtc/video/receive_statistics_proxy.h"
namespace webrtc {
VideoStreamDecoder::VideoStreamDecoder(
vcm::VideoReceiver* video_receiver,
VCMFrameTypeCallback* vcm_frame_type_callback,
VCMPacketRequestCallback* vcm_packet_request_callback,
bool enable_nack,
bool enable_fec,
ReceiveStatisticsProxy* receive_statistics_proxy,
rtc::VideoSinkInterface<VideoFrame>* incoming_video_stream)
: video_receiver_(video_receiver),
receive_stats_callback_(receive_statistics_proxy),
incoming_video_stream_(incoming_video_stream),
last_rtt_ms_(0) {
RTC_DCHECK(video_receiver_);
static const int kMaxPacketAgeToNack = 450;
static const int kMaxNackListSize = 250;
video_receiver_->SetNackSettings(kMaxNackListSize,
kMaxPacketAgeToNack, 0);
video_receiver_->RegisterReceiveCallback(this);
video_receiver_->RegisterFrameTypeCallback(vcm_frame_type_callback);
video_receiver_->RegisterReceiveStatisticsCallback(this);
VCMVideoProtection video_protection =
enable_nack ? (enable_fec ? kProtectionNackFEC : kProtectionNack)
: kProtectionNone;
VCMDecodeErrorMode decode_error_mode = enable_nack ? kNoErrors : kWithErrors;
video_receiver_->SetVideoProtection(video_protection, true);
video_receiver_->SetDecodeErrorMode(decode_error_mode);
VCMPacketRequestCallback* packet_request_callback =
enable_nack ? vcm_packet_request_callback : nullptr;
video_receiver_->RegisterPacketRequestCallback(packet_request_callback);
}
VideoStreamDecoder::~VideoStreamDecoder() {
// Note: There's an assumption at this point that the decoder thread is
// *not* running. If it was, then there could be a race for each of these
// callbacks.
// Unset all the callback pointers that we set in the ctor.
video_receiver_->RegisterPacketRequestCallback(nullptr);
video_receiver_->RegisterReceiveStatisticsCallback(nullptr);
video_receiver_->RegisterFrameTypeCallback(nullptr);
video_receiver_->RegisterReceiveCallback(nullptr);
}
// Do not acquire the lock of |video_receiver_| in this function. Decode
// callback won't necessarily be called from the decoding thread. The decoding
// thread may have held the lock when calling VideoDecoder::Decode, Reset, or
// Release. Acquiring the same lock in the path of decode callback can deadlock.
int32_t VideoStreamDecoder::FrameToRender(VideoFrame& video_frame,
rtc::Optional<uint8_t> qp,
VideoContentType content_type) {
receive_stats_callback_->OnDecodedFrame(qp, content_type);
incoming_video_stream_->OnFrame(video_frame);
return 0;
}
int32_t VideoStreamDecoder::ReceivedDecodedReferenceFrame(
const uint64_t picture_id) {
RTC_NOTREACHED();
return 0;
}
void VideoStreamDecoder::OnIncomingPayloadType(int payload_type) {
receive_stats_callback_->OnIncomingPayloadType(payload_type);
}
void VideoStreamDecoder::OnDecoderImplementationName(
const char* implementation_name) {
receive_stats_callback_->OnDecoderImplementationName(implementation_name);
}
void VideoStreamDecoder::OnReceiveRatesUpdated(uint32_t bit_rate,
uint32_t frame_rate) {
receive_stats_callback_->OnIncomingRate(frame_rate, bit_rate);
}
void VideoStreamDecoder::OnDiscardedPacketsUpdated(int discarded_packets) {
receive_stats_callback_->OnDiscardedPacketsUpdated(discarded_packets);
}
void VideoStreamDecoder::OnFrameCountsUpdated(const FrameCounts& frame_counts) {
receive_stats_callback_->OnFrameCountsUpdated(frame_counts);
}
void VideoStreamDecoder::OnFrameBufferTimingsUpdated(int decode_ms,
int max_decode_ms,
int current_delay_ms,
int target_delay_ms,
int jitter_buffer_ms,
int min_playout_delay_ms,
int render_delay_ms) {}
void VideoStreamDecoder::OnTimingFrameInfoUpdated(const TimingFrameInfo& info) {
}
void VideoStreamDecoder::OnCompleteFrame(bool is_keyframe, size_t size_bytes) {}
void VideoStreamDecoder::OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) {
video_receiver_->SetReceiveChannelParameters(max_rtt_ms);
rtc::CritScope lock(&crit_);
last_rtt_ms_ = avg_rtt_ms;
}
} // namespace webrtc