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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_CAST_RTCP_RTCP_SENDER_H_
#define MEDIA_CAST_RTCP_RTCP_SENDER_H_
#include <list>
#include <string>
#include "media/cast/cast_config.h"
#include "media/cast/cast_defines.h"
#include "media/cast/rtcp/rtcp.h"
#include "media/cast/rtcp/rtcp_defines.h"
#include "media/cast/transport/cast_transport_defines.h"
#include "media/cast/transport/rtcp/rtcp_builder.h"
namespace media {
namespace cast {
// TODO(mikhal): Resolve duplication between this and RtcpBuilder.
class RtcpSender {
public:
RtcpSender(scoped_refptr<CastEnvironment> cast_environment,
transport::PacedPacketSender* outgoing_transport,
uint32 sending_ssrc,
const std::string& c_name);
virtual ~RtcpSender();
// Returns true if |event| is an interesting receiver event.
// Such an event should be sent via RTCP.
static bool IsReceiverEvent(const media::cast::CastLoggingEvent& event);
void SendRtcpFromRtpReceiver(uint32 packet_type_flags,
const transport::RtcpReportBlock* report_block,
const RtcpReceiverReferenceTimeReport* rrtr,
const RtcpCastMessage* cast_message,
RtcpReceiverLogMessage* receiver_log);
enum RtcpPacketType {
kRtcpSr = 0x0002,
kRtcpRr = 0x0004,
kRtcpBye = 0x0008,
kRtcpPli = 0x0010,
kRtcpNack = 0x0020,
kRtcpFir = 0x0040,
kRtcpSrReq = 0x0200,
kRtcpDlrr = 0x0400,
kRtcpRrtr = 0x0800,
kRtcpRpsi = 0x8000,
kRtcpRemb = 0x10000,
kRtcpCast = 0x20000,
kRtcpSenderLog = 0x40000,
kRtcpReceiverLog = 0x80000,
};
private:
void BuildRR(const transport::RtcpReportBlock* report_block,
std::vector<uint8>* packet) const;
void AddReportBlocks(const transport::RtcpReportBlock& report_block,
std::vector<uint8>* packet) const;
void BuildSdec(std::vector<uint8>* packet) const;
void BuildPli(uint32 remote_ssrc,
std::vector<uint8>* packet) const;
void BuildRemb(const RtcpRembMessage* remb,
std::vector<uint8>* packet) const;
void BuildRpsi(const RtcpRpsiMessage* rpsi,
std::vector<uint8>* packet) const;
void BuildNack(const RtcpNackMessage* nack,
std::vector<uint8>* packet) const;
void BuildBye(std::vector<uint8>* packet) const;
void BuildRrtr(const RtcpReceiverReferenceTimeReport* rrtr,
std::vector<uint8>* packet) const;
void BuildCast(const RtcpCastMessage* cast_message,
std::vector<uint8>* packet) const;
void BuildReceiverLog(RtcpReceiverLogMessage* receiver_log_message,
std::vector<uint8>* packet) const;
inline void BitrateToRembExponentBitrate(uint32 bitrate,
uint8* exponent,
uint32* mantissa) const {
// 6 bit exponent and a 18 bit mantissa.
*exponent = 0;
for (int i = 0; i < 64; ++i) {
if (bitrate <= (262143u << i)) {
*exponent = i;
break;
}
}
*mantissa = (bitrate >> *exponent);
}
const uint32 ssrc_;
const std::string c_name_;
// Not owned by this class.
transport::PacedPacketSender* const transport_;
scoped_refptr<CastEnvironment> cast_environment_;
DISALLOW_COPY_AND_ASSIGN(RtcpSender);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_RTCP_RTCP_SENDER_H_
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