73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_MEDIA_TIMEPACKETIZER_H_
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#define DOM_MEDIA_TIMEPACKETIZER_H_
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#include "AudioPacketizer.h"
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#include "TimeUnits.h"
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namespace mozilla {
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/**
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* This class wraps an AudioPacketizer and provides packets of audio with
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* timestamps.
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*/
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template <typename InputType, typename OutputType>
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class TimedPacketizer {
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public:
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TimedPacketizer(uint32_t aPacketSize, uint32_t aChannels,
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int64_t aInitialTick, int64_t aBase)
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: mPacketizer(aPacketSize, aChannels),
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mTimeStamp(media::TimeUnit(aInitialTick, aBase)),
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mBase(aBase) {}
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void Input(const InputType* aFrames, uint32_t aFrameCount) {
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mPacketizer.Input(aFrames, aFrameCount);
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}
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media::TimeUnit Output(OutputType* aOutputBuffer) {
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MOZ_ASSERT(mPacketizer.PacketsAvailable());
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media::TimeUnit pts = mTimeStamp;
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mPacketizer.Output(aOutputBuffer);
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mTimeStamp += media::TimeUnit(mPacketizer.mPacketSize, mBase);
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return pts;
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}
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media::TimeUnit Drain(OutputType* aOutputBuffer, uint32_t& aWritten) {
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MOZ_ASSERT(!mPacketizer.PacketsAvailable(),
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"Consume all packets before calling drain");
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media::TimeUnit pts = mTimeStamp;
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aWritten = mPacketizer.Output(aOutputBuffer);
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mTimeStamp += media::TimeUnit(mPacketizer.mPacketSize, mBase);
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return pts;
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}
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// Call this when a discontinuity in input has been detected, e.g. based on
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// the pts of input packets.
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void Discontinuity(int64_t aNewTick) {
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MOZ_ASSERT(!mPacketizer.FramesAvailable(),
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"Drain before enqueueing discontinuous audio");
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mTimeStamp = media::TimeUnit(aNewTick, mBase);
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}
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void Clear() { mPacketizer.Clear(); }
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uint32_t PacketSize() const { return mPacketizer.mPacketSize; }
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uint32_t ChannelCount() const { return mPacketizer.mChannels; }
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uint32_t PacketsAvailable() const { return mPacketizer.PacketsAvailable(); }
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uint32_t FramesAvailable() const { return mPacketizer.FramesAvailable(); }
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private:
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AudioPacketizer<InputType, OutputType> mPacketizer;
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media::TimeUnit mTimeStamp;
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uint64_t mBase;
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};
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} // namespace mozilla
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#endif // DOM_MEDIA_TIMEPACKETIZER_H_
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