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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(SampleSink_h_)
#define SampleSink_h_
#include "BaseFilter.h"
#include "DirectShowUtils.h"
#include "mozilla/RefPtr.h"
#include "mozilla/ReentrantMonitor.h"
namespace mozilla {
class SampleSink {
public:
SampleSink();
virtual ~SampleSink();
// Sets the audio format of the incoming samples. The upstream filter
// calls this. This makes a copy.
void SetAudioFormat(const WAVEFORMATEX* aInFormat);
// Copies the format of incoming audio samples into into *aOutFormat.
void GetAudioFormat(WAVEFORMATEX* aOutFormat);
// Called when a sample is delivered by the DirectShow graph to the sink.
// The decode thread retrieves the sample by calling WaitForSample().
// Blocks if there's already a sample waiting to be consumed by the decode
// thread.
HRESULT Receive(IMediaSample* aSample);
// Retrieves a sample from the sample queue, blocking until one becomes
// available, or until an error occurs. Returns S_FALSE on EOS.
HRESULT Extract(RefPtr<IMediaSample>& aOutSample);
// Unblocks any threads waiting in GetSample().
// Clears mSample, which unblocks upstream stream.
void Flush();
// Opens up the sink to receive more samples in PutSample().
// Clears EOS flag.
void Reset();
// Marks that we've reacehd the end of stream.
void SetEOS();
// Returns whether we're at end of stream.
bool AtEOS();
private:
// All data in this class is syncronized by mMonitor.
ReentrantMonitor mMonitor;
RefPtr<IMediaSample> mSample;
// Format of the audio stream we're receiving.
WAVEFORMATEX mAudioFormat;
bool mIsFlushing;
bool mAtEOS;
};
} // namespace mozilla
#endif // SampleSink_h_
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