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