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// Copyright 2014 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_NET_CAST_TRANSPORT_DEFINES_H_
#define MEDIA_CAST_NET_CAST_TRANSPORT_DEFINES_H_
#include <stddef.h>
#include <stdint.h>
#include <map>
#include <set>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
namespace media {
namespace cast {
// Enums used to indicate transport readiness state.
enum CastTransportStatus {
TRANSPORT_AUDIO_UNINITIALIZED = 0,
TRANSPORT_VIDEO_UNINITIALIZED,
TRANSPORT_AUDIO_INITIALIZED,
TRANSPORT_VIDEO_INITIALIZED,
TRANSPORT_INVALID_CRYPTO_CONFIG,
TRANSPORT_SOCKET_ERROR,
CAST_TRANSPORT_STATUS_LAST = TRANSPORT_SOCKET_ERROR
};
// kRtcpCastAllPacketsLost is used in PacketIDSet and
// on the wire to mean that ALL packets for a particular
// frame are lost.
const uint16_t kRtcpCastAllPacketsLost = 0xffff;
// kRtcpCastLastPacket is used in PacketIDSet to ask for
// the last packet of a frame to be retransmitted.
const uint16_t kRtcpCastLastPacket = 0xfffe;
const size_t kMaxIpPacketSize = 1500;
// Each uint16_t represents one packet id within a cast frame.
// Can also contain kRtcpCastAllPacketsLost and kRtcpCastLastPacket.
using PacketIdSet = std::set<uint16_t>;
// Each uint8_t represents one cast frame.
using MissingFramesAndPacketsMap = std::map<uint8_t, PacketIdSet>;
using Packet = std::vector<uint8_t>;
using PacketRef = scoped_refptr<base::RefCountedData<Packet>>;
using PacketList = std::vector<PacketRef>;
class FrameIdWrapHelperTest;
// TODO(miu): UGLY IN-LINE DEFINITION IN HEADER FILE! Move to appropriate
// location, separated into .h and .cc files. http://crbug.com/530839
class FrameIdWrapHelper {
public:
explicit FrameIdWrapHelper(uint32_t start_frame_id)
: largest_frame_id_seen_(start_frame_id) {}
uint32_t MapTo32bitsFrameId(const uint8_t over_the_wire_frame_id) {
uint32_t ret = (largest_frame_id_seen_ & ~0xff) | over_the_wire_frame_id;
// Add 1000 to both sides to avoid underflows.
if (1000 + ret - largest_frame_id_seen_ > 1000 + 127) {
ret -= 0x100;
} else if (1000 + ret - largest_frame_id_seen_ < 1000 - 128) {
ret += 0x100;
}
if (1000 + ret - largest_frame_id_seen_ > 1000) {
largest_frame_id_seen_ = ret;
}
return ret;
}
private:
friend class FrameIdWrapHelperTest;
uint32_t largest_frame_id_seen_;
DISALLOW_COPY_AND_ASSIGN(FrameIdWrapHelper);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_NET_CAST_TRANSPORT_DEFINES_H_
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