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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if !defined(NesteggPacketHolder_h_)
# define NesteggPacketHolder_h_
# include <deque>
# include <stdint.h>
# include "nsAutoRef.h"
# include "nestegg/nestegg.h"
namespace mozilla {
// Holds a nestegg_packet, and its file offset. This is needed so we
// know the offset in the file we've played up to, in order to calculate
// whether it's likely we can play through to the end without needing
// to stop to buffer, given the current download rate.
class NesteggPacketHolder {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(NesteggPacketHolder)
NesteggPacketHolder()
: mPacket(nullptr),
mOffset(-1),
mTimestamp(-1),
mDuration(-1),
mDefaultDuration(-1),
mTrack(0),
mIsKeyframe(false) {}
bool Init(nestegg_packet* aPacket, nestegg* aContext, int64_t aOffset,
unsigned aTrack, bool aIsKeyframe) {
uint64_t timestamp_ns;
if (nestegg_packet_tstamp(aPacket, ×tamp_ns) == -1) {
return false;
}
// We store the timestamp as signed microseconds so that it's easily
// comparable to other timestamps we have in the system.
mTimestamp = timestamp_ns / 1000;
mPacket = aPacket;
mOffset = aOffset;
mTrack = aTrack;
mIsKeyframe = aIsKeyframe;
uint64_t duration_ns;
if (!nestegg_packet_duration(aPacket, &duration_ns)) {
mDuration = duration_ns / 1000;
}
if (!nestegg_track_default_duration(aContext, mTrack, &duration_ns)) {
mDefaultDuration = duration_ns / 1000;
}
return true;
}
nestegg_packet* Packet() {
MOZ_ASSERT(IsInitialized());
return mPacket;
}
int64_t Offset() {
MOZ_ASSERT(IsInitialized());
return mOffset;
}
int64_t Timestamp() {
MOZ_ASSERT(IsInitialized());
return mTimestamp;
}
int64_t Duration() {
MOZ_ASSERT(IsInitialized());
return mDuration;
}
int64_t DefaultDuration() const {
MOZ_ASSERT(IsInitialized());
return mDefaultDuration;
}
unsigned Track() {
MOZ_ASSERT(IsInitialized());
return mTrack;
}
bool IsKeyframe() {
MOZ_ASSERT(IsInitialized());
return mIsKeyframe;
}
private:
~NesteggPacketHolder() { nestegg_free_packet(mPacket); }
bool IsInitialized() const { return mOffset >= 0; }
nestegg_packet* mPacket;
// Offset in bytes. This is the offset of the end of the Block
// which contains the packet.
int64_t mOffset;
// Packet presentation timestamp in microseconds.
int64_t mTimestamp;
// Packet duration in microseconds; -1 if unknown or retrieval failed.
// https://www.webmproject.org/docs/container/#BlockDuration
int64_t mDuration;
// Default durtaion in microseconds; -1 if unknown or retrieval failed.
// https://www.webmproject.org/docs/container/#Duration
int64_t mDefaultDuration;
// Track ID.
unsigned mTrack;
// Does this packet contain a keyframe?
bool mIsKeyframe;
// Copy constructor and assignment operator not implemented. Don't use them!
NesteggPacketHolder(const NesteggPacketHolder& aOther);
NesteggPacketHolder& operator=(NesteggPacketHolder const& aOther);
};
// Queue for holding nestegg packets.
class WebMPacketQueue {
public:
int32_t GetSize() { return mQueue.size(); }
void Push(NesteggPacketHolder* aItem) { mQueue.push_back(aItem); }
void PushFront(NesteggPacketHolder* aItem) {
mQueue.push_front(std::move(aItem));
}
already_AddRefed<NesteggPacketHolder> PopFront() {
RefPtr<NesteggPacketHolder> result = std::move(mQueue.front());
mQueue.pop_front();
return result.forget();
}
void Reset() {
while (!mQueue.empty()) {
mQueue.pop_front();
}
}
private:
std::deque<RefPtr<NesteggPacketHolder>> mQueue;
};
} // namespace mozilla
#endif
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