зеркало из https://github.com/mozilla/gecko-dev.git
125 строки
3.4 KiB
C++
125 строки
3.4 KiB
C++
/* -*- 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 <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)
|
|
, mIsKeyframe(false) {}
|
|
|
|
bool Init(nestegg_packet* aPacket, 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;
|
|
}
|
|
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; }
|
|
unsigned Track() { MOZ_ASSERT(IsInitialized()); return mTrack; }
|
|
bool IsKeyframe() { MOZ_ASSERT(IsInitialized()); return mIsKeyframe; }
|
|
|
|
private:
|
|
~NesteggPacketHolder()
|
|
{
|
|
nestegg_free_packet(mPacket);
|
|
}
|
|
|
|
bool IsInitialized() { 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.
|
|
int64_t mDuration;
|
|
|
|
// 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(Move(aItem));
|
|
}
|
|
|
|
already_AddRefed<NesteggPacketHolder> PopFront() {
|
|
RefPtr<NesteggPacketHolder> result = mQueue.front().forget();
|
|
mQueue.pop_front();
|
|
return result.forget();
|
|
}
|
|
|
|
void Reset() {
|
|
while (!mQueue.empty()) {
|
|
mQueue.pop_front();
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::deque<RefPtr<NesteggPacketHolder>> mQueue;
|
|
};
|
|
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|
|
|