1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/directshow/SampleSink.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,67 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#if !defined(SampleSink_h_)
1.11 +#define SampleSink_h_
1.12 +
1.13 +#include "BaseFilter.h"
1.14 +#include "DirectShowUtils.h"
1.15 +#include "nsAutoPtr.h"
1.16 +#include "mozilla/RefPtr.h"
1.17 +#include "mozilla/ReentrantMonitor.h"
1.18 +
1.19 +namespace mozilla {
1.20 +
1.21 +class SampleSink {
1.22 +public:
1.23 + SampleSink();
1.24 + virtual ~SampleSink();
1.25 +
1.26 + // Sets the audio format of the incoming samples. The upstream filter
1.27 + // calls this. This makes a copy.
1.28 + void SetAudioFormat(const WAVEFORMATEX* aInFormat);
1.29 +
1.30 + // Copies the format of incoming audio samples into into *aOutFormat.
1.31 + void GetAudioFormat(WAVEFORMATEX* aOutFormat);
1.32 +
1.33 + // Called when a sample is delivered by the DirectShow graph to the sink.
1.34 + // The decode thread retrieves the sample by calling WaitForSample().
1.35 + // Blocks if there's already a sample waiting to be consumed by the decode
1.36 + // thread.
1.37 + HRESULT Receive(IMediaSample* aSample);
1.38 +
1.39 + // Retrieves a sample from the sample queue, blocking until one becomes
1.40 + // available, or until an error occurs. Returns S_FALSE on EOS.
1.41 + HRESULT Extract(RefPtr<IMediaSample>& aOutSample);
1.42 +
1.43 + // Unblocks any threads waiting in GetSample().
1.44 + // Clears mSample, which unblocks upstream stream.
1.45 + void Flush();
1.46 +
1.47 + // Opens up the sink to receive more samples in PutSample().
1.48 + // Clears EOS flag.
1.49 + void Reset();
1.50 +
1.51 + // Marks that we've reacehd the end of stream.
1.52 + void SetEOS();
1.53 +
1.54 + // Returns whether we're at end of stream.
1.55 + bool AtEOS();
1.56 +
1.57 +private:
1.58 + // All data in this class is syncronized by mMonitor.
1.59 + ReentrantMonitor mMonitor;
1.60 + RefPtr<IMediaSample> mSample;
1.61 +
1.62 + // Format of the audio stream we're receiving.
1.63 + WAVEFORMATEX mAudioFormat;
1.64 +
1.65 + bool mIsFlushing;
1.66 + bool mAtEOS;
1.67 +};
1.68 +
1.69 +} // namespace mozilla
1.70 +#endif // SampleSink_h_
