The Tor Browser: content/media/wmf/WMFReader.cpp@44a2da4a2ab2 (annotated)

content/media/wmf/WMFReader.cpp@44a2da4a2ab2 (annotated)

content/media/wmf/WMFReader.cpp

Fri, 16 Jan 2015 04:50:19 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Fri, 16 Jan 2015 04:50:19 +0100
branch: TOR_BUG_9701
changeset 13: 44a2da4a2ab2
permissions: -rw-r--r--

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

 /* -*- 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/. */
 #include "WMFReader.h"
 #include "WMFDecoder.h"
 #include "WMFUtils.h"
 #include "WMFByteStream.h"
 #include "WMFSourceReaderCallback.h"
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/dom/TimeRanges.h"
 #include "mozilla/dom/HTMLMediaElement.h"
 #include "mozilla/Preferences.h"
 #include "DXVA2Manager.h"
 #include "ImageContainer.h"
 #include "Layers.h"
 #include "mozilla/layers/LayersTypes.h"
 #ifndef MOZ_SAMPLE_TYPE_FLOAT32
 #error We expect 32bit float audio samples on desktop for the Windows Media Foundation media backend.
 #endif
 #include "MediaDecoder.h"
 #include "VideoUtils.h"
 #include "gfx2DGlue.h"
 using namespace mozilla::gfx;
 using mozilla::layers::Image;
 using mozilla::layers::LayerManager;
 using mozilla::layers::LayersBackend;
 namespace mozilla {
 #ifdef PR_LOGGING
 extern PRLogModuleInfo* gMediaDecoderLog;
 #define DECODER_LOG(...) PR_LOG(gMediaDecoderLog, PR_LOG_DEBUG, (__VA_ARGS__))
 #else
 #define DECODER_LOG(...)
 #endif
 // Uncomment to enable verbose per-sample logging.
 //#define LOG_SAMPLE_DECODE 1
 WMFReader::WMFReader(AbstractMediaDecoder* aDecoder)
   : MediaDecoderReader(aDecoder),
     mSourceReader(nullptr),
     mAudioChannels(0),
     mAudioBytesPerSample(0),
     mAudioRate(0),
     mVideoWidth(0),
     mVideoHeight(0),
     mVideoStride(0),
     mAudioFrameSum(0),
     mAudioFrameOffset(0),
     mHasAudio(false),
     mHasVideo(false),
     mUseHwAccel(false),
     mMustRecaptureAudioPosition(true),
     mIsMP3Enabled(WMFDecoder::IsMP3Supported()),
     mCOMInitialized(false)
 {
   NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
   MOZ_COUNT_CTOR(WMFReader);
 }
 WMFReader::~WMFReader()
 {
   NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
   // Note: We must shutdown the byte stream before calling MFShutdown, else we
   // get assertion failures when unlocking the byte stream's work queue.
   if (mByteStream) {
     DebugOnly<nsresult> rv = mByteStream->Shutdown();
     NS_ASSERTION(NS_SUCCEEDED(rv), "Failed to shutdown WMFByteStream");
   }
   DebugOnly<HRESULT> hr = wmf::MFShutdown();
   NS_ASSERTION(SUCCEEDED(hr), "MFShutdown failed");
   MOZ_COUNT_DTOR(WMFReader);
 }
 bool
 WMFReader::InitializeDXVA()
 {
   if (!Preferences::GetBool("media.windows-media-foundation.use-dxva", false)) {
     return false;
   }
   MOZ_ASSERT(mDecoder->GetImageContainer());
   // Extract the layer manager backend type so that we can determine
   // whether it's worthwhile using DXVA. If we're not running with a D3D
   // layer manager then the readback of decoded video frames from GPU to
   // CPU memory grinds painting to a halt, and makes playback performance
   // *worse*.
   MediaDecoderOwner* owner = mDecoder->GetOwner();
   NS_ENSURE_TRUE(owner, false);
   dom::HTMLMediaElement* element = owner->GetMediaElement();
   NS_ENSURE_TRUE(element, false);
   nsRefPtr<LayerManager> layerManager =
     nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
   NS_ENSURE_TRUE(layerManager, false);
   LayersBackend backend = layerManager->GetCompositorBackendType();
   if (backend != LayersBackend::LAYERS_D3D9 &&
       backend != LayersBackend::LAYERS_D3D10 &&
       backend != LayersBackend::LAYERS_D3D11) {
     return false;
   }
   mDXVA2Manager = DXVA2Manager::Create();
   return mDXVA2Manager != nullptr;
 }
 nsresult
 WMFReader::Init(MediaDecoderReader* aCloneDonor)
 {
   NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
   nsresult rv = WMFDecoder::LoadDLLs();
   NS_ENSURE_SUCCESS(rv, rv);
   if (FAILED(wmf::MFStartup())) {
     NS_WARNING("Failed to initialize Windows Media Foundation");
     return NS_ERROR_FAILURE;
   }
   mSourceReaderCallback = new WMFSourceReaderCallback();
   // Must be created on main thread.
   mByteStream = new WMFByteStream(mDecoder->GetResource(), mSourceReaderCallback);
   rv = mByteStream->Init();
   NS_ENSURE_SUCCESS(rv, rv);
   if (mDecoder->GetImageContainer() != nullptr &&
       IsVideoContentType(mDecoder->GetResource()->GetContentType())) {
     mUseHwAccel = InitializeDXVA();
   } else {
     mUseHwAccel = false;
   }
   return NS_OK;
 }
 bool
 WMFReader::HasAudio()
 {
   NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
   return mHasAudio;
 }
 bool
 WMFReader::HasVideo()
 {
   NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
   return mHasVideo;
 }
 static HRESULT
 ConfigureSourceReaderStream(IMFSourceReader *aReader,
                             const DWORD aStreamIndex,
                             const GUID& aOutputSubType,
                             const GUID* aAllowedInSubTypes,
                             const uint32_t aNumAllowedInSubTypes)
 {
   NS_ENSURE_TRUE(aReader, E_POINTER);
   NS_ENSURE_TRUE(aAllowedInSubTypes, E_POINTER);
   RefPtr<IMFMediaType> nativeType;
   RefPtr<IMFMediaType> type;
   HRESULT hr;
   // Find the native format of the stream.
   hr = aReader->GetNativeMediaType(aStreamIndex, 0, byRef(nativeType));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Get the native output subtype of the stream. This denotes the uncompressed
   // type.
   GUID subType;
   hr = nativeType->GetGUID(MF_MT_SUBTYPE, &subType);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Ensure the input type of the media is in the allowed formats list.
   bool isSubTypeAllowed = false;
   for (uint32_t i = 0; i < aNumAllowedInSubTypes; i++) {
     if (aAllowedInSubTypes[i] == subType) {
       isSubTypeAllowed = true;
       break;
     }
   }
   if (!isSubTypeAllowed) {
     nsCString name = GetGUIDName(subType);
     DECODER_LOG("ConfigureSourceReaderStream subType=%s is not allowed to be decoded", name.get());
     return E_FAIL;
   }
   // Find the major type.
   GUID majorType;
   hr = nativeType->GetGUID(MF_MT_MAJOR_TYPE, &majorType);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Define the output type.
   hr = wmf::MFCreateMediaType(byRef(type));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = type->SetGUID(MF_MT_MAJOR_TYPE, majorType);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = type->SetGUID(MF_MT_SUBTYPE, aOutputSubType);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Set the uncompressed format. This can fail if the decoder can't produce
   // that type.
   return aReader->SetCurrentMediaType(aStreamIndex, nullptr, type);
 }
 // Returns the duration of the resource, in microseconds.
 HRESULT
 GetSourceReaderDuration(IMFSourceReader *aReader,
                         int64_t& aOutDuration)
 {
   AutoPropVar var;
   HRESULT hr = aReader->GetPresentationAttribute(MF_SOURCE_READER_MEDIASOURCE,
                                                  MF_PD_DURATION,
                                                  &var);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // WMF stores duration in hundred nanosecond units.
   int64_t duration_hns = 0;
   hr = wmf::PropVariantToInt64(var, &duration_hns);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   aOutDuration = HNsToUsecs(duration_hns);
   return S_OK;
 }
 HRESULT
 GetSourceReaderCanSeek(IMFSourceReader* aReader, bool& aOutCanSeek)
 {
   NS_ENSURE_TRUE(aReader, E_FAIL);
   HRESULT hr;
   AutoPropVar var;
   hr = aReader->GetPresentationAttribute(MF_SOURCE_READER_MEDIASOURCE,
                                          MF_SOURCE_READER_MEDIASOURCE_CHARACTERISTICS,
                                          &var);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   ULONG flags = 0;
   hr = wmf::PropVariantToUInt32(var, &flags);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   aOutCanSeek = ((flags & MFMEDIASOURCE_CAN_SEEK) == MFMEDIASOURCE_CAN_SEEK);
   return S_OK;
 }
 HRESULT
 WMFReader::ConfigureVideoFrameGeometry(IMFMediaType* aMediaType)
 {
   NS_ENSURE_TRUE(aMediaType != nullptr, E_POINTER);
   HRESULT hr;
   // Verify that the video subtype is what we expect it to be.
   // When using hardware acceleration/DXVA2 the video format should
   // be NV12, which is DXVA2's preferred format. For software decoding
   // we use YV12, as that's easier for us to stick into our rendering
   // pipeline than NV12. NV12 has interleaved UV samples, whereas YV12
   // is a planar format.
   GUID videoFormat;
   hr = aMediaType->GetGUID(MF_MT_SUBTYPE, &videoFormat);
   NS_ENSURE_TRUE(videoFormat == MFVideoFormat_NV12 || !mUseHwAccel, E_FAIL);
   NS_ENSURE_TRUE(videoFormat == MFVideoFormat_YV12 || mUseHwAccel, E_FAIL);
   nsIntRect pictureRegion;
   hr = GetPictureRegion(aMediaType, pictureRegion);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   UINT32 width = 0, height = 0;
   hr = MFGetAttributeSize(aMediaType, MF_MT_FRAME_SIZE, &width, &height);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   uint32_t aspectNum = 0, aspectDenom = 0;
   hr = MFGetAttributeRatio(aMediaType,
                            MF_MT_PIXEL_ASPECT_RATIO,
                            &aspectNum,
                            &aspectDenom);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Calculate and validate the picture region and frame dimensions after
   // scaling by the pixel aspect ratio.
   nsIntSize frameSize = nsIntSize(width, height);
   nsIntSize displaySize = nsIntSize(pictureRegion.width, pictureRegion.height);
   ScaleDisplayByAspectRatio(displaySize, float(aspectNum) / float(aspectDenom));
   if (!IsValidVideoRegion(frameSize, pictureRegion, displaySize)) {
     // Video track's frame sizes will overflow. Ignore the video track.
     return E_FAIL;
   }
   // Success! Save state.
   mInfo.mVideo.mDisplay = displaySize;
   GetDefaultStride(aMediaType, &mVideoStride);
   mVideoWidth = width;
   mVideoHeight = height;
   mPictureRegion = pictureRegion;
   DECODER_LOG("WMFReader frame geometry frame=(%u,%u) stride=%u picture=(%d, %d, %d, %d) display=(%d,%d) PAR=%d:%d",
               width, height,
               mVideoStride,
               mPictureRegion.x, mPictureRegion.y, mPictureRegion.width, mPictureRegion.height,
               displaySize.width, displaySize.height,
               aspectNum, aspectDenom);
   return S_OK;
 }
 HRESULT
 WMFReader::ConfigureVideoDecoder()
 {
   NS_ASSERTION(mSourceReader, "Must have a SourceReader before configuring decoders!");
   // Determine if we have video.
   if (!mSourceReader ||
       !SourceReaderHasStream(mSourceReader, MF_SOURCE_READER_FIRST_VIDEO_STREAM)) {
     // No stream, no error.
     return S_OK;
   }
   if (!mDecoder->GetImageContainer()) {
     // We can't display the video, so don't bother to decode; disable the stream.
     return mSourceReader->SetStreamSelection(MF_SOURCE_READER_FIRST_VIDEO_STREAM, FALSE);
   }
   static const GUID MP4VideoTypes[] = {
     MFVideoFormat_H264
   };
   HRESULT hr = ConfigureSourceReaderStream(mSourceReader,
                                            MF_SOURCE_READER_FIRST_VIDEO_STREAM,
                                            mUseHwAccel ? MFVideoFormat_NV12 : MFVideoFormat_YV12,
                                            MP4VideoTypes,
                                            ArrayLength(MP4VideoTypes));
   if (FAILED(hr)) {
     DECODER_LOG("Failed to configured video output");
     return hr;
   }
   RefPtr<IMFMediaType> mediaType;
   hr = mSourceReader->GetCurrentMediaType(MF_SOURCE_READER_FIRST_VIDEO_STREAM,
                                           byRef(mediaType));
   if (FAILED(hr)) {
     NS_WARNING("Failed to get configured video media type");
     return hr;
   }
   if (FAILED(ConfigureVideoFrameGeometry(mediaType))) {
     NS_WARNING("Failed configured video frame dimensions");
     return hr;
   }
   DECODER_LOG("Successfully configured video stream");
   mHasVideo = mInfo.mVideo.mHasVideo = true;
   return S_OK;
 }
 void
 WMFReader::GetSupportedAudioCodecs(const GUID** aCodecs, uint32_t* aNumCodecs)
 {
   MOZ_ASSERT(aCodecs);
   MOZ_ASSERT(aNumCodecs);
   if (mIsMP3Enabled) {
     GUID aacOrMp3 = MFMPEG4Format_Base;
     aacOrMp3.Data1 = 0x6D703461;// FOURCC('m','p','4','a');
     static const GUID codecs[] = {
       MFAudioFormat_AAC,
       MFAudioFormat_MP3,
       aacOrMp3
     };
     *aCodecs = codecs;
     *aNumCodecs = ArrayLength(codecs);
   } else {
     static const GUID codecs[] = {
       MFAudioFormat_AAC
     };
     *aCodecs = codecs;
     *aNumCodecs = ArrayLength(codecs);
   }
 }
 HRESULT
 WMFReader::ConfigureAudioDecoder()
 {
   NS_ASSERTION(mSourceReader, "Must have a SourceReader before configuring decoders!");
   if (!mSourceReader ||
       !SourceReaderHasStream(mSourceReader, MF_SOURCE_READER_FIRST_AUDIO_STREAM)) {
     // No stream, no error.
     return S_OK;
   }
   const GUID* codecs;
   uint32_t numCodecs = 0;
   GetSupportedAudioCodecs(&codecs, &numCodecs);
   HRESULT hr = ConfigureSourceReaderStream(mSourceReader,
                                            MF_SOURCE_READER_FIRST_AUDIO_STREAM,
                                            MFAudioFormat_Float,
                                            codecs,
                                            numCodecs);
   if (FAILED(hr)) {
     NS_WARNING("Failed to configure WMF Audio decoder for PCM output");
     return hr;
   }
   RefPtr<IMFMediaType> mediaType;
   hr = mSourceReader->GetCurrentMediaType(MF_SOURCE_READER_FIRST_AUDIO_STREAM,
                                           byRef(mediaType));
   if (FAILED(hr)) {
     NS_WARNING("Failed to get configured audio media type");
     return hr;
   }
   mAudioRate = MFGetAttributeUINT32(mediaType, MF_MT_AUDIO_SAMPLES_PER_SECOND, 0);
   mAudioChannels = MFGetAttributeUINT32(mediaType, MF_MT_AUDIO_NUM_CHANNELS, 0);
   mAudioBytesPerSample = MFGetAttributeUINT32(mediaType, MF_MT_AUDIO_BITS_PER_SAMPLE, 16) / 8;
   mInfo.mAudio.mChannels = mAudioChannels;
   mInfo.mAudio.mRate = mAudioRate;
   mHasAudio = mInfo.mAudio.mHasAudio = true;
   DECODER_LOG("Successfully configured audio stream. rate=%u channels=%u bitsPerSample=%u",
               mAudioRate, mAudioChannels, mAudioBytesPerSample);
   return S_OK;
 }
 HRESULT
 WMFReader::CreateSourceReader()
 {
   HRESULT hr;
   RefPtr<IMFAttributes> attr;
   hr = wmf::MFCreateAttributes(byRef(attr), 1);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = attr->SetUnknown(MF_SOURCE_READER_ASYNC_CALLBACK, mSourceReaderCallback);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   if (mUseHwAccel) {
     hr = attr->SetUnknown(MF_SOURCE_READER_D3D_MANAGER,
                           mDXVA2Manager->GetDXVADeviceManager());
     if (FAILED(hr)) {
       DECODER_LOG("Failed to set DXVA2 D3D Device manager on source reader attributes");
       mUseHwAccel = false;
     }
   }
   hr = wmf::MFCreateSourceReaderFromByteStream(mByteStream, attr, byRef(mSourceReader));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = ConfigureVideoDecoder();
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = ConfigureAudioDecoder();
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   if (mUseHwAccel && mInfo.mVideo.mHasVideo) {
     RefPtr<IMFTransform> videoDecoder;
     hr = mSourceReader->GetServiceForStream(MF_SOURCE_READER_FIRST_VIDEO_STREAM,
                                             GUID_NULL,
                                             IID_IMFTransform,
                                             (void**)(IMFTransform**)(byRef(videoDecoder)));
     if (SUCCEEDED(hr)) {
       ULONG_PTR manager = ULONG_PTR(mDXVA2Manager->GetDXVADeviceManager());
       hr = videoDecoder->ProcessMessage(MFT_MESSAGE_SET_D3D_MANAGER,
                                         manager);
       if (hr == MF_E_TRANSFORM_TYPE_NOT_SET) {
         // Ignore MF_E_TRANSFORM_TYPE_NOT_SET. Vista returns this here
         // on some, perhaps all, video cards. This may be because activating
         // DXVA changes the available output types. It seems to be safe to
         // ignore this error.
         hr = S_OK;
       }
     }
     if (FAILED(hr)) {
       DECODER_LOG("Failed to set DXVA2 D3D Device manager on decoder hr=0x%x", hr);
       mUseHwAccel = false;
     }
   }
   return hr;
 }
 nsresult
 WMFReader::ReadMetadata(MediaInfo* aInfo,
                         MetadataTags** aTags)
 {
   NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
   DECODER_LOG("WMFReader::ReadMetadata()");
   HRESULT hr;
   const bool triedToInitDXVA = mUseHwAccel;
   if (FAILED(CreateSourceReader())) {
     mSourceReader = nullptr;
     if (triedToInitDXVA && !mUseHwAccel) {
       // We tried to initialize DXVA and failed. Try again to create the
       // IMFSourceReader but this time we won't use DXVA. Note that we
       // must recreate the IMFSourceReader from scratch, as on some systems
       // (AMD Radeon 3000) we cannot successfully reconfigure an existing
       // reader to not use DXVA after we've failed to configure DXVA.
       // See bug 987127.
       if (FAILED(CreateSourceReader())) {
         mSourceReader = nullptr;
       }
     }
   }
   if (!mSourceReader) {
     NS_WARNING("Failed to create IMFSourceReader");
     return NS_ERROR_FAILURE;
   }
   if (mInfo.HasVideo()) {
     DECODER_LOG("Using DXVA: %s", (mUseHwAccel ? "Yes" : "No"));
   }
   // Abort if both video and audio failed to initialize.
   NS_ENSURE_TRUE(mInfo.HasValidMedia(), NS_ERROR_FAILURE);
   // Get the duration, and report it to the decoder if we have it.
   int64_t duration = 0;
   hr = GetSourceReaderDuration(mSourceReader, duration);
   if (SUCCEEDED(hr)) {
     ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
     mDecoder->SetMediaEndTime(duration);
   }
   // We can seek if we get a duration *and* the reader reports that it's
   // seekable.
   bool canSeek = false;
   if (FAILED(hr) ||
       FAILED(GetSourceReaderCanSeek(mSourceReader, canSeek)) ||
       !canSeek) {
     mDecoder->SetMediaSeekable(false);
   }
   *aInfo = mInfo;
   *aTags = nullptr;
   // aTags can be retrieved using techniques like used here:
   // http://blogs.msdn.com/b/mf/archive/2010/01/12/mfmediapropdump.aspx
   return NS_OK;
 }
 bool
 WMFReader::DecodeAudioData()
 {
   NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
   HRESULT hr;
   hr = mSourceReader->ReadSample(MF_SOURCE_READER_FIRST_AUDIO_STREAM,
 , // control flags
 , // read stream index
                                  nullptr,
                                  nullptr,
                                  nullptr);
   if (FAILED(hr)) {
     DECODER_LOG("WMFReader::DecodeAudioData() ReadSample failed with hr=0x%x", hr);
     // End the stream.
     return false;
   }
   DWORD flags = 0;
   LONGLONG timestampHns = 0;
   RefPtr<IMFSample> sample;
   hr = mSourceReaderCallback->Wait(&flags, &timestampHns, byRef(sample));
   if (FAILED(hr) ||
       (flags & MF_SOURCE_READERF_ERROR) ||
       (flags & MF_SOURCE_READERF_ENDOFSTREAM) ||
       (flags & MF_SOURCE_READERF_CURRENTMEDIATYPECHANGED)) {
     DECODER_LOG("WMFReader::DecodeAudioData() ReadSample failed with hr=0x%x flags=0x%x",
                 hr, flags);
     // End the stream.
     return false;
   }
   if (!sample) {
     // Not enough data? Try again...
     return true;
   }
   RefPtr<IMFMediaBuffer> buffer;
   hr = sample->ConvertToContiguousBuffer(byRef(buffer));
   NS_ENSURE_TRUE(SUCCEEDED(hr), false);
   BYTE* data = nullptr; // Note: *data will be owned by the IMFMediaBuffer, we don't need to free it.
   DWORD maxLength = 0, currentLength = 0;
   hr = buffer->Lock(&data, &maxLength, &currentLength);
   NS_ENSURE_TRUE(SUCCEEDED(hr), false);
   uint32_t numFrames = currentLength / mAudioBytesPerSample / mAudioChannels;
   NS_ASSERTION(sizeof(AudioDataValue) == mAudioBytesPerSample, "Size calculation is wrong");
   nsAutoArrayPtr<AudioDataValue> pcmSamples(new AudioDataValue[numFrames * mAudioChannels]);
   memcpy(pcmSamples.get(), data, currentLength);
   buffer->Unlock();
   // We calculate the timestamp and the duration based on the number of audio
   // frames we've already played. We don't trust the timestamp stored on the
   // IMFSample, as sometimes it's wrong, possibly due to buggy encoders?
   // If this sample block comes after a discontinuity (i.e. a gap or seek)
   // reset the frame counters, and capture the timestamp. Future timestamps
   // will be offset from this block's timestamp.
   UINT32 discontinuity = false;
   sample->GetUINT32(MFSampleExtension_Discontinuity, &discontinuity);
   if (mMustRecaptureAudioPosition || discontinuity) {
     mAudioFrameSum = 0;
     hr = HNsToFrames(timestampHns, mAudioRate, &mAudioFrameOffset);
     NS_ENSURE_TRUE(SUCCEEDED(hr), false);
     mMustRecaptureAudioPosition = false;
   }
   int64_t timestamp;
   hr = FramesToUsecs(mAudioFrameOffset + mAudioFrameSum, mAudioRate, &timestamp);
   NS_ENSURE_TRUE(SUCCEEDED(hr), false);
   mAudioFrameSum += numFrames;
   int64_t duration;
   hr = FramesToUsecs(numFrames, mAudioRate, &duration);
   NS_ENSURE_TRUE(SUCCEEDED(hr), false);
   mAudioQueue.Push(new AudioData(mDecoder->GetResource()->Tell(),
                                  timestamp,
                                  duration,
                                  numFrames,
                                  pcmSamples.forget(),
                                  mAudioChannels));
   #ifdef LOG_SAMPLE_DECODE
   DECODER_LOG("Decoded audio sample! timestamp=%lld duration=%lld currentLength=%u",
               timestamp, duration, currentLength);
   #endif
   return true;
 }
 HRESULT
 WMFReader::CreateBasicVideoFrame(IMFSample* aSample,
                                  int64_t aTimestampUsecs,
                                  int64_t aDurationUsecs,
                                  int64_t aOffsetBytes,
                                  VideoData** aOutVideoData)
 {
   NS_ENSURE_TRUE(aSample, E_POINTER);
   NS_ENSURE_TRUE(aOutVideoData, E_POINTER);
   *aOutVideoData = nullptr;
   HRESULT hr;
   RefPtr<IMFMediaBuffer> buffer;
   // Must convert to contiguous buffer to use IMD2DBuffer interface.
   hr = aSample->ConvertToContiguousBuffer(byRef(buffer));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Try and use the IMF2DBuffer interface if available, otherwise fallback
   // to the IMFMediaBuffer interface. Apparently IMF2DBuffer is more efficient,
   // but only some systems (Windows 8?) support it.
   BYTE* data = nullptr;
   LONG stride = 0;
   RefPtr<IMF2DBuffer> twoDBuffer;
   hr = buffer->QueryInterface(static_cast<IMF2DBuffer**>(byRef(twoDBuffer)));
   if (SUCCEEDED(hr)) {
     hr = twoDBuffer->Lock2D(&data, &stride);
     NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   } else {
     hr = buffer->Lock(&data, nullptr, nullptr);
     NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
     stride = mVideoStride;
   }
   // YV12, planar format: [YYYY....][VVVV....][UUUU....]
   // i.e., Y, then V, then U.
   VideoData::YCbCrBuffer b;
   // Y (Y') plane
   b.mPlanes[0].mData = data;
   b.mPlanes[0].mStride = stride;
   b.mPlanes[0].mHeight = mVideoHeight;
   b.mPlanes[0].mWidth = mVideoWidth;
   b.mPlanes[0].mOffset = 0;
   b.mPlanes[0].mSkip = 0;
   // The V and U planes are stored 16-row-aligned, so we need to add padding
   // to the row heights to ensure the Y'CbCr planes are referenced properly.
   uint32_t padding = 0;
   if (mVideoHeight % 16 != 0) {
     padding = 16 - (mVideoHeight % 16);
   }
   uint32_t y_size = stride * (mVideoHeight + padding);
   uint32_t v_size = stride * (mVideoHeight + padding) / 4;
   uint32_t halfStride = (stride + 1) / 2;
   uint32_t halfHeight = (mVideoHeight + 1) / 2;
   uint32_t halfWidth = (mVideoWidth + 1) / 2;
   // U plane (Cb)
   b.mPlanes[1].mData = data + y_size + v_size;
   b.mPlanes[1].mStride = halfStride;
   b.mPlanes[1].mHeight = halfHeight;
   b.mPlanes[1].mWidth = halfWidth;
   b.mPlanes[1].mOffset = 0;
   b.mPlanes[1].mSkip = 0;
   // V plane (Cr)
   b.mPlanes[2].mData = data + y_size;
   b.mPlanes[2].mStride = halfStride;
   b.mPlanes[2].mHeight = halfHeight;
   b.mPlanes[2].mWidth = halfWidth;
   b.mPlanes[2].mOffset = 0;
   b.mPlanes[2].mSkip = 0;
   VideoData *v = VideoData::Create(mInfo.mVideo,
                                    mDecoder->GetImageContainer(),
                                    aOffsetBytes,
                                    aTimestampUsecs,
                                    aDurationUsecs,
                                    b,
                                    false,
                                    -1,
                                    ToIntRect(mPictureRegion));
   if (twoDBuffer) {
     twoDBuffer->Unlock2D();
   } else {
     buffer->Unlock();
   }
   *aOutVideoData = v;
   return S_OK;
 }
 HRESULT
 WMFReader::CreateD3DVideoFrame(IMFSample* aSample,
                                int64_t aTimestampUsecs,
                                int64_t aDurationUsecs,
                                int64_t aOffsetBytes,
                                VideoData** aOutVideoData)
 {
   NS_ENSURE_TRUE(aSample, E_POINTER);
   NS_ENSURE_TRUE(aOutVideoData, E_POINTER);
   NS_ENSURE_TRUE(mDXVA2Manager, E_ABORT);
   NS_ENSURE_TRUE(mUseHwAccel, E_ABORT);
   *aOutVideoData = nullptr;
   HRESULT hr;
   nsRefPtr<Image> image;
   hr = mDXVA2Manager->CopyToImage(aSample,
                                   mPictureRegion,
                                   mDecoder->GetImageContainer(),
                                   getter_AddRefs(image));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   NS_ENSURE_TRUE(image, E_FAIL);
   VideoData *v = VideoData::CreateFromImage(mInfo.mVideo,
                                             mDecoder->GetImageContainer(),
                                             aOffsetBytes,
                                             aTimestampUsecs,
                                             aDurationUsecs,
                                             image.forget(),
                                             false,
                                             -1,
                                             ToIntRect(mPictureRegion));
   NS_ENSURE_TRUE(v, E_FAIL);
   *aOutVideoData = v;
   return S_OK;
 }
 bool
 WMFReader::DecodeVideoFrame(bool &aKeyframeSkip,
                             int64_t aTimeThreshold)
 {
   NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
   // Record number of frames decoded and parsed. Automatically update the
   // stats counters using the AutoNotifyDecoded stack-based class.
   uint32_t parsed = 0, decoded = 0;
   AbstractMediaDecoder::AutoNotifyDecoded autoNotify(mDecoder, parsed, decoded);
   HRESULT hr;
   hr = mSourceReader->ReadSample(MF_SOURCE_READER_FIRST_VIDEO_STREAM,
 , // control flags
 , // read stream index
                                  nullptr,
                                  nullptr,
                                  nullptr);
   if (FAILED(hr)) {
     DECODER_LOG("WMFReader::DecodeVideoData() ReadSample failed with hr=0x%x", hr);
     return false;
   }
   DWORD flags = 0;
   LONGLONG timestampHns = 0;
   RefPtr<IMFSample> sample;
   hr = mSourceReaderCallback->Wait(&flags, &timestampHns, byRef(sample));
   if (flags & MF_SOURCE_READERF_ERROR) {
     NS_WARNING("WMFReader: Catastrophic failure reading video sample");
     // Future ReadSample() calls will fail, so give up and report end of stream.
     return false;
   }
   if (FAILED(hr)) {
     // Unknown failure, ask caller to try again?
     return true;
   }
   if (!sample) {
     if ((flags & MF_SOURCE_READERF_ENDOFSTREAM)) {
       DECODER_LOG("WMFReader; Null sample after video decode, at end of stream");
       return false;
     }
     DECODER_LOG("WMFReader; Null sample after video decode. Maybe insufficient data...");
     return true;
   }
   if ((flags & MF_SOURCE_READERF_CURRENTMEDIATYPECHANGED)) {
     DECODER_LOG("WMFReader: Video media type changed!");
     RefPtr<IMFMediaType> mediaType;
     hr = mSourceReader->GetCurrentMediaType(MF_SOURCE_READER_FIRST_VIDEO_STREAM,
                                             byRef(mediaType));
     if (FAILED(hr) ||
         FAILED(ConfigureVideoFrameGeometry(mediaType))) {
       NS_WARNING("Failed to reconfigure video media type");
       return false;
     }
   }
   int64_t timestamp = HNsToUsecs(timestampHns);
   if (timestamp < aTimeThreshold) {
     return true;
   }
   int64_t offset = mDecoder->GetResource()->Tell();
   int64_t duration = GetSampleDuration(sample);
   VideoData* v = nullptr;
   if (mUseHwAccel) {
     hr = CreateD3DVideoFrame(sample, timestamp, duration, offset, &v);
   } else {
     hr = CreateBasicVideoFrame(sample, timestamp, duration, offset, &v);
   }
   NS_ENSURE_TRUE(SUCCEEDED(hr) && v, false);
   parsed++;
   decoded++;
   mVideoQueue.Push(v);
   #ifdef LOG_SAMPLE_DECODE
   DECODER_LOG("Decoded video sample timestamp=%lld duration=%lld stride=%d height=%u flags=%u",
               timestamp, duration, mVideoStride, mVideoHeight, flags);
   #endif
   if ((flags & MF_SOURCE_READERF_ENDOFSTREAM)) {
     // End of stream.
     DECODER_LOG("End of video stream");
     return false;
   }
   return true;
 }
 nsresult
 WMFReader::Seek(int64_t aTargetUs,
                 int64_t aStartTime,
                 int64_t aEndTime,
                 int64_t aCurrentTime)
 {
   DECODER_LOG("WMFReader::Seek() %lld", aTargetUs);
   NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
 #ifdef DEBUG
   bool canSeek = false;
   GetSourceReaderCanSeek(mSourceReader, canSeek);
   NS_ASSERTION(canSeek, "WMFReader::Seek() should only be called if we can seek!");
 #endif
   nsresult rv = ResetDecode();
   NS_ENSURE_SUCCESS(rv, rv);
   // Mark that we must recapture the audio frame count from the next sample.
   // WMF doesn't set a discontinuity marker when we seek to time 0, so we
   // must remember to recapture the audio frame offset and reset the frame
   // sum on the next audio packet we decode.
   mMustRecaptureAudioPosition = true;
   AutoPropVar var;
   HRESULT hr = InitPropVariantFromInt64(UsecsToHNs(aTargetUs), &var);
   NS_ENSURE_TRUE(SUCCEEDED(hr), NS_ERROR_FAILURE);
   hr = mSourceReader->SetCurrentPosition(GUID_NULL, var);
   NS_ENSURE_TRUE(SUCCEEDED(hr), NS_ERROR_FAILURE);
   return NS_OK;
 }
 } // namespace mozilla

The Tor Browser / annotate

content/media/wmf/WMFReader.cpp@44a2da4a2ab2 (annotated)

content/media/wmf/WMFReader.cpp