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