blob: 692e4664ba358e06ef2354a5f3b20608680dc0e1 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Implement a simple base class for a DirectShow input pin. It may only be
// used in a single threaded apartment.
// Avoid including strsafe.h via dshow as it will cause build warnings.
#include <dshow.h>
#include <wrl/client.h>
#include "base/memory/ref_counted.h"
namespace media {
class PinBase : public IPin,
public IMemInputPin,
public base::RefCounted<PinBase> {
explicit PinBase(IBaseFilter* owner);
// Function used for changing the owner.
// If the owner is deleted the owner should first call this function
// with owner = NULL.
void SetOwner(IBaseFilter* owner);
// Checks if a media type is acceptable. This is called when this pin is
// connected to an output pin. Must return true if the media type is
// acceptable, false otherwise.
virtual bool IsMediaTypeValid(const AM_MEDIA_TYPE* media_type) = 0;
// Enumerates valid media types.
virtual bool GetValidMediaType(int index, AM_MEDIA_TYPE* media_type) = 0;
// Called when new media is received. Note that this is not on the same
// thread as where the pin is created.
STDMETHOD(Receive)(IMediaSample* sample) override = 0;
STDMETHOD(Connect)(IPin* receive_pin,
const AM_MEDIA_TYPE* media_type) override;
STDMETHOD(ReceiveConnection)(IPin* connector,
const AM_MEDIA_TYPE* media_type) override;
STDMETHOD(Disconnect)() override;
STDMETHOD(ConnectedTo)(IPin** pin) override;
STDMETHOD(ConnectionMediaType)(AM_MEDIA_TYPE* media_type) override;
STDMETHOD(QueryPinInfo)(PIN_INFO* info) override;
STDMETHOD(QueryDirection)(PIN_DIRECTION* pin_dir) override;
STDMETHOD(QueryId)(LPWSTR* id) override;
STDMETHOD(QueryAccept)(const AM_MEDIA_TYPE* media_type) override;
STDMETHOD(EnumMediaTypes)(IEnumMediaTypes** types) override;
STDMETHOD(QueryInternalConnections)(IPin** pins, ULONG* no_pins) override;
STDMETHOD(EndOfStream)() override;
STDMETHOD(BeginFlush)() override;
STDMETHOD(EndFlush)() override;
double dRate) override;
// Inherited from IMemInputPin.
STDMETHOD(GetAllocator)(IMemAllocator** allocator) override;
STDMETHOD(NotifyAllocator)(IMemAllocator* allocator, BOOL read_only) override;
ALLOCATOR_PROPERTIES* properties) override;
STDMETHOD(ReceiveMultiple)(IMediaSample** samples,
long sample_count,
long* processed) override;
STDMETHOD(ReceiveCanBlock)() override;
// Inherited from IUnknown.
STDMETHOD(QueryInterface)(REFIID id, void** object_ptr) override;
STDMETHOD_(ULONG, AddRef)() override;
STDMETHOD_(ULONG, Release)() override;
friend class base::RefCounted<PinBase>;
virtual ~PinBase();
AM_MEDIA_TYPE current_media_type_;
Microsoft::WRL::ComPtr<IPin> connected_pin_;
// owner_ is the filter owning this pin. We don't reference count it since
// that would create a circular reference count.
IBaseFilter* owner_;
} // namespace media