The Tor Browser: content/media/directshow/DirectShowUtils.cpp@44a2da4a2ab2 (annotated)

content/media/directshow/DirectShowUtils.cpp@44a2da4a2ab2 (annotated)

content/media/directshow/DirectShowUtils.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

 /* 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 "dshow.h"
 #include "dmodshow.h"
 #include "wmcodecdsp.h"
 #include "dmoreg.h"
 #include "DirectShowUtils.h"
 #include "nsAutoPtr.h"
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/RefPtr.h"
 namespace mozilla {
 #if defined(PR_LOGGING)
 // Create a table which maps GUIDs to a string representation of the GUID.
 // This is useful for debugging purposes, for logging the GUIDs of media types.
 // This is only available when logging is enabled, i.e. not in release builds.
 struct GuidToName {
   const char* name;
   const GUID guid;
 };
 #pragma push_macro("OUR_GUID_ENTRY")
 #undef OUR_GUID_ENTRY
 #define OUR_GUID_ENTRY(name, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
 { #name, {l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8} },
 static const GuidToName GuidToNameTable[] = {
 #include <uuids.h>
 };
 #pragma pop_macro("OUR_GUID_ENTRY")
 const char*
 GetDirectShowGuidName(const GUID& aGuid)
 {
   const size_t len = ArrayLength(GuidToNameTable);
   for (unsigned i = 0; i < len; i++) {
     if (IsEqualGUID(aGuid, GuidToNameTable[i].guid)) {
       return GuidToNameTable[i].name;
     }
   }
   return "Unknown";
 }
 #endif // PR_LOGGING
 void
 RemoveGraphFromRunningObjectTable(DWORD aRotRegister)
 {
   nsRefPtr<IRunningObjectTable> runningObjectTable;
   if (SUCCEEDED(GetRunningObjectTable(0, getter_AddRefs(runningObjectTable)))) {
     runningObjectTable->Revoke(aRotRegister);
   }
 }
 HRESULT
 AddGraphToRunningObjectTable(IUnknown *aUnkGraph, DWORD *aOutRotRegister)
 {
   HRESULT hr;
   nsRefPtr<IMoniker> moniker;
   nsRefPtr<IRunningObjectTable> runningObjectTable;
   hr = GetRunningObjectTable(0, getter_AddRefs(runningObjectTable));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   const size_t STRING_LENGTH = 256;
   WCHAR wsz[STRING_LENGTH];
   StringCchPrintfW(wsz,
                    STRING_LENGTH,
                    L"FilterGraph %08x pid %08x",
                    (DWORD_PTR)aUnkGraph,
                    GetCurrentProcessId());
   hr = CreateItemMoniker(L"!", wsz, getter_AddRefs(moniker));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = runningObjectTable->Register(ROTFLAGS_REGISTRATIONKEEPSALIVE,
                                     aUnkGraph,
                                     moniker,
                                     aOutRotRegister);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   return S_OK;
 }
 const char*
 GetGraphNotifyString(long evCode)
 {
 #define CASE(x) case x: return #x
   switch(evCode) {
     CASE(EC_ACTIVATE); // A video window is being activated or deactivated.
     CASE(EC_BANDWIDTHCHANGE); // Not supported.
     CASE(EC_BUFFERING_DATA); // The graph is buffering data, or has stopped buffering data.
     CASE(EC_BUILT); // Send by the Video Control when a graph has been built. Not forwarded to applications.
     CASE(EC_CLOCK_CHANGED); // The reference clock has changed.
     CASE(EC_CLOCK_UNSET); // The clock provider was disconnected.
     CASE(EC_CODECAPI_EVENT); // Sent by an encoder to signal an encoding event.
     CASE(EC_COMPLETE); // All data from a particular stream has been rendered.
     CASE(EC_CONTENTPROPERTY_CHANGED); // Not supported.
     CASE(EC_DEVICE_LOST); // A Plug and Play device was removed or has become available again.
     CASE(EC_DISPLAY_CHANGED); // The display mode has changed.
     CASE(EC_END_OF_SEGMENT); // The end of a segment has been reached.
     CASE(EC_EOS_SOON); // Not supported.
     CASE(EC_ERROR_STILLPLAYING); // An asynchronous command to run the graph has failed.
     CASE(EC_ERRORABORT); // An operation was aborted because of an error.
     CASE(EC_ERRORABORTEX); // An operation was aborted because of an error.
     CASE(EC_EXTDEVICE_MODE_CHANGE); // Not supported.
     CASE(EC_FILE_CLOSED); // The source file was closed because of an unexpected event.
     CASE(EC_FULLSCREEN_LOST); // The video renderer is switching out of full-screen mode.
     CASE(EC_GRAPH_CHANGED); // The filter graph has changed.
     CASE(EC_LENGTH_CHANGED); // The length of a source has changed.
     CASE(EC_LOADSTATUS); // Notifies the application of progress when opening a network file.
     CASE(EC_MARKER_HIT); // Not supported.
     CASE(EC_NEED_RESTART); // A filter is requesting that the graph be restarted.
     CASE(EC_NEW_PIN); // Not supported.
     CASE(EC_NOTIFY_WINDOW); // Notifies a filter of the video renderer's window.
     CASE(EC_OLE_EVENT); // A filter is passing a text string to the application.
     CASE(EC_OPENING_FILE); // The graph is opening a file, or has finished opening a file.
     CASE(EC_PALETTE_CHANGED); // The video palette has changed.
     CASE(EC_PAUSED); // A pause request has completed.
     CASE(EC_PLEASE_REOPEN); // The source file has changed.
     CASE(EC_PREPROCESS_COMPLETE); // Sent by the WM ASF Writer filter when it completes the pre-processing for multipass encoding.
     CASE(EC_PROCESSING_LATENCY); // Indicates the amount of time that a component is taking to process each sample.
     CASE(EC_QUALITY_CHANGE); // The graph is dropping samples, for quality control.
     //CASE(EC_RENDER_FINISHED); // Not supported.
     CASE(EC_REPAINT); // A video renderer requires a repaint.
     CASE(EC_SAMPLE_LATENCY); // Specifies how far behind schedule a component is for processing samples.
     //CASE(EC_SAMPLE_NEEDED); // Requests a new input sample from the Enhanced Video Renderer (EVR) filter.
     CASE(EC_SCRUB_TIME); // Specifies the time stamp for the most recent frame step.
     CASE(EC_SEGMENT_STARTED); // A new segment has started.
     CASE(EC_SHUTTING_DOWN); // The filter graph is shutting down, prior to being destroyed.
     CASE(EC_SNDDEV_IN_ERROR); // A device error has occurred in an audio capture filter.
     CASE(EC_SNDDEV_OUT_ERROR); // A device error has occurred in an audio renderer filter.
     CASE(EC_STARVATION); // A filter is not receiving enough data.
     CASE(EC_STATE_CHANGE); // The filter graph has changed state.
     CASE(EC_STATUS); // Contains two arbitrary status strings.
     CASE(EC_STEP_COMPLETE); // A filter performing frame stepping has stepped the specified number of frames.
     CASE(EC_STREAM_CONTROL_STARTED); // A stream-control start command has taken effect.
     CASE(EC_STREAM_CONTROL_STOPPED); // A stream-control stop command has taken effect.
     CASE(EC_STREAM_ERROR_STILLPLAYING); // An error has occurred in a stream. The stream is still playing.
     CASE(EC_STREAM_ERROR_STOPPED); // A stream has stopped because of an error.
     CASE(EC_TIMECODE_AVAILABLE); // Not supported.
     CASE(EC_UNBUILT); // Send by the Video Control when a graph has been torn down. Not forwarded to applications.
     CASE(EC_USERABORT); // The user has terminated playback.
     CASE(EC_VIDEO_SIZE_CHANGED); // The native video size has changed.
     CASE(EC_VIDEOFRAMEREADY); // A video frame is ready for display.
     CASE(EC_VMR_RECONNECTION_FAILED); // Sent by the VMR-7 and the VMR-9 when it was unable to accept a dynamic format change request from the upstream decoder.
     CASE(EC_VMR_RENDERDEVICE_SET); // Sent when the VMR has selected its rendering mechanism.
     CASE(EC_VMR_SURFACE_FLIPPED); // Sent when the VMR-7's allocator presenter has called the DirectDraw Flip method on the surface being presented.
     CASE(EC_WINDOW_DESTROYED); // The video renderer was destroyed or removed from the graph.
     CASE(EC_WMT_EVENT); // Sent by the WM ASF Reader filter when it reads ASF files protected by digital rights management (DRM).
     CASE(EC_WMT_INDEX_EVENT); // Sent when an application uses the WM ASF Writer to index Windows Media Video files.
     CASE(S_OK); // Success.
     CASE(VFW_S_AUDIO_NOT_RENDERED); // Partial success; the audio was not rendered.
     CASE(VFW_S_DUPLICATE_NAME); // Success; the Filter Graph Manager modified a filter name to avoid duplication.
     CASE(VFW_S_PARTIAL_RENDER); // Partial success; some of the streams in this movie are in an unsupported format.
     CASE(VFW_S_VIDEO_NOT_RENDERED); // Partial success; the video was not rendered.
     CASE(E_ABORT); // Operation aborted.
     CASE(E_OUTOFMEMORY); // Insufficient memory.
     CASE(E_POINTER); // Null pointer argument.
     CASE(VFW_E_CANNOT_CONNECT); // No combination of intermediate filters could be found to make the connection.
     CASE(VFW_E_CANNOT_RENDER); // No combination of filters could be found to render the stream.
     CASE(VFW_E_NO_ACCEPTABLE_TYPES); // There is no common media type between these pins.
     CASE(VFW_E_NOT_IN_GRAPH);
     default:
       return "Unknown Code";
   };
 #undef CASE
 }
 HRESULT
 CreateAndAddFilter(IGraphBuilder* aGraph,
                    REFGUID aFilterClsId,
                    LPCWSTR aFilterName,
                    IBaseFilter **aOutFilter)
 {
   NS_ENSURE_TRUE(aGraph, E_POINTER);
   NS_ENSURE_TRUE(aOutFilter, E_POINTER);
   HRESULT hr;
   nsRefPtr<IBaseFilter> filter;
   hr = CoCreateInstance(aFilterClsId,
                         nullptr,
                         CLSCTX_INPROC_SERVER,
                         IID_IBaseFilter,
                         getter_AddRefs(filter));
   if (FAILED(hr)) {
     // Object probably not available on this system.
     return hr;
   }
   hr = aGraph->AddFilter(filter, aFilterName);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   filter.forget(aOutFilter);
   return S_OK;
 }
 HRESULT
 AddMP3DMOWrapperFilter(IGraphBuilder* aGraph,
                        IBaseFilter **aOutFilter)
 {
   NS_ENSURE_TRUE(aGraph, E_POINTER);
   NS_ENSURE_TRUE(aOutFilter, E_POINTER);
   HRESULT hr;
   // Create the wrapper filter.
   nsRefPtr<IBaseFilter> filter;
   hr = CoCreateInstance(CLSID_DMOWrapperFilter,
                         nullptr,
                         CLSCTX_INPROC_SERVER,
                         IID_IBaseFilter,
                         getter_AddRefs(filter));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Query for IDMOWrapperFilter.
   nsRefPtr<IDMOWrapperFilter> dmoWrapper;
   hr = filter->QueryInterface(IID_IDMOWrapperFilter,
                               getter_AddRefs(dmoWrapper));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   hr = dmoWrapper->Init(CLSID_CMP3DecMediaObject, DMOCATEGORY_AUDIO_DECODER);
   if (FAILED(hr)) {
     // Can't instantiate MP3 DMO. It doesn't exist on Windows XP, we're
     // probably hitting that. Don't log warning to console, this is an
     // expected error.
     return hr;
   }
   // Add the wrapper filter to graph.
   hr = aGraph->AddFilter(filter, L"MP3 Decoder DMO");
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   filter.forget(aOutFilter);
   return S_OK;
 }
 // Match a pin by pin direction and connection state.
 HRESULT
 MatchUnconnectedPin(IPin* aPin,
                     PIN_DIRECTION aPinDir,
                     bool *aOutMatches)
 {
   NS_ENSURE_TRUE(aPin, E_POINTER);
   NS_ENSURE_TRUE(aOutMatches, E_POINTER);
   // Ensure the pin is unconnected.
   RefPtr<IPin> peer;
   HRESULT hr = aPin->ConnectedTo(byRef(peer));
   if (hr != VFW_E_NOT_CONNECTED) {
     *aOutMatches = false;
     return hr;
   }
   // Ensure the pin is of the specified direction.
   PIN_DIRECTION pinDir;
   hr = aPin->QueryDirection(&pinDir);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   *aOutMatches = (pinDir == aPinDir);
   return S_OK;
 }
 // Return the first unconnected input pin or output pin.
 TemporaryRef<IPin>
 GetUnconnectedPin(IBaseFilter* aFilter, PIN_DIRECTION aPinDir)
 {
   RefPtr<IEnumPins> enumPins;
   HRESULT hr = aFilter->EnumPins(byRef(enumPins));
   NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
   // Test each pin to see if it matches the direction we're looking for.
   RefPtr<IPin> pin;
   while (S_OK == enumPins->Next(1, byRef(pin), nullptr)) {
     bool matches = FALSE;
     if (SUCCEEDED(MatchUnconnectedPin(pin, aPinDir, &matches)) &&
         matches) {
       return pin;
     }
   }
   return nullptr;
 }
 HRESULT
 ConnectFilters(IGraphBuilder* aGraph,
                IBaseFilter* aOutputFilter,
                IBaseFilter* aInputFilter)
 {
   RefPtr<IPin> output = GetUnconnectedPin(aOutputFilter, PINDIR_OUTPUT);
   NS_ENSURE_TRUE(output, E_FAIL);
   RefPtr<IPin> input = GetUnconnectedPin(aInputFilter, PINDIR_INPUT);
   NS_ENSURE_TRUE(output, E_FAIL);
   return aGraph->Connect(output, input);
 }
 } // namespace mozilla

The Tor Browser / annotate

content/media/directshow/DirectShowUtils.cpp@44a2da4a2ab2 (annotated)

content/media/directshow/DirectShowUtils.cpp