blob: 16463525c729de224d6a1dfb9befe76d4617a25f [file] [log] [blame]
/*
* Copyright (c) 2017 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 <utility>
#include "webrtc/call/rtx_receive_stream.h"
#include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
#include "webrtc/rtc_base/logging.h"
namespace webrtc {
RtxReceiveStream::RtxReceiveStream(RtpPacketSinkInterface* media_sink,
std::map<int, int> associated_payload_types,
uint32_t media_ssrc)
: media_sink_(media_sink),
associated_payload_types_(std::move(associated_payload_types)),
media_ssrc_(media_ssrc) {
if (associated_payload_types_.empty()) {
LOG(LS_WARNING)
<< "RtxReceiveStream created with empty payload type mapping.";
}
}
RtxReceiveStream::~RtxReceiveStream() = default;
void RtxReceiveStream::OnRtpPacket(const RtpPacketReceived& rtx_packet) {
rtc::ArrayView<const uint8_t> payload = rtx_packet.payload();
if (payload.size() < kRtxHeaderSize) {
return;
}
auto it = associated_payload_types_.find(rtx_packet.PayloadType());
if (it == associated_payload_types_.end()) {
LOG(LS_VERBOSE) << "Unknown payload type "
<< static_cast<int>(rtx_packet.PayloadType())
<< " on rtx ssrc " << rtx_packet.Ssrc();
return;
}
RtpPacketReceived media_packet;
media_packet.CopyHeaderFrom(rtx_packet);
media_packet.SetSsrc(media_ssrc_);
media_packet.SetSequenceNumber((payload[0] << 8) + payload[1]);
media_packet.SetPayloadType(it->second);
media_packet.set_recovered(true);
// Skip the RTX header.
rtc::ArrayView<const uint8_t> rtx_payload =
payload.subview(kRtxHeaderSize);
uint8_t* media_payload = media_packet.AllocatePayload(rtx_payload.size());
RTC_DCHECK(media_payload != nullptr);
memcpy(media_payload, rtx_payload.data(), rtx_payload.size());
media_sink_->OnRtpPacket(media_packet);
}
} // namespace webrtc