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