| /* $Id: dshowclasses.cpp 4062 2012-04-19 06:36:57Z ming $ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <pjmedia-videodev/config.h> |
| |
| |
| #if defined(PJMEDIA_VIDEO_DEV_HAS_DSHOW) && PJMEDIA_VIDEO_DEV_HAS_DSHOW != 0 |
| |
| |
| #include <assert.h> |
| #include <streams.h> |
| |
| typedef void (*input_callback)(void *user_data, IMediaSample *pMediaSample); |
| |
| const GUID CLSID_NullRenderer = {0xF9168C5E, 0xCEB2, 0x4FAA, {0xB6, 0xBF, |
| 0x32, 0x9B, 0xF3, 0x9F, 0xA1, 0xE4}}; |
| |
| const GUID CLSID_SourceFilter = {0xF9168C5E, 0xCEB2, 0x4FAA, {0xB6, 0xBF, |
| 0x32, 0x9B, 0xF3, 0x9F, 0xA1, 0xE5}}; |
| |
| class NullRenderer: public CBaseRenderer |
| { |
| public: |
| NullRenderer(HRESULT *pHr); |
| virtual ~NullRenderer(); |
| |
| virtual HRESULT CheckMediaType(const CMediaType *pmt); |
| virtual HRESULT DoRenderSample(IMediaSample *pMediaSample); |
| |
| input_callback input_cb; |
| void *user_data; |
| }; |
| |
| class OutputPin: public CBaseOutputPin |
| { |
| public: |
| OutputPin(CBaseFilter *pFilter, CCritSec *pLock, HRESULT *pHr); |
| ~OutputPin(); |
| |
| HRESULT Push(void *buf, long size); |
| |
| virtual HRESULT CheckMediaType(const CMediaType *pmt); |
| virtual HRESULT DecideBufferSize(IMemAllocator *pAlloc, |
| ALLOCATOR_PROPERTIES *ppropInputRequest); |
| |
| CMediaType mediaType; |
| long bufSize; |
| }; |
| |
| class SourceFilter: public CBaseFilter |
| { |
| public: |
| SourceFilter(); |
| ~SourceFilter(); |
| |
| int GetPinCount(); |
| CBasePin* GetPin(int n); |
| |
| protected: |
| CCritSec lock; |
| OutputPin* outPin; |
| }; |
| |
| OutputPin::OutputPin(CBaseFilter *pFilter, CCritSec *pLock, HRESULT *pHr): |
| CBaseOutputPin("OutputPin", pFilter, pLock, pHr, L"OutputPin") |
| { |
| } |
| |
| OutputPin::~OutputPin() |
| { |
| } |
| |
| HRESULT OutputPin::CheckMediaType(const CMediaType *pmt) |
| { |
| return S_OK; |
| } |
| |
| HRESULT OutputPin::DecideBufferSize(IMemAllocator *pAlloc, |
| ALLOCATOR_PROPERTIES *ppropInputRequest) |
| { |
| ALLOCATOR_PROPERTIES properties; |
| |
| ppropInputRequest->cbBuffer = bufSize; |
| ppropInputRequest->cBuffers = 1; |
| |
| /* First set the buffer descriptions we're interested in */ |
| pAlloc->SetProperties(ppropInputRequest, &properties); |
| |
| return S_OK; |
| } |
| |
| HRESULT OutputPin::Push(void *buf, long size) |
| { |
| HRESULT hr; |
| IMediaSample *pSample; |
| VIDEOINFOHEADER *vi; |
| AM_MEDIA_TYPE *pmt; |
| BYTE *dst_buf; |
| |
| /** |
| * Hold the critical section here as the pin might get disconnected |
| * during the Deliver() method call. |
| */ |
| m_pLock->Lock(); |
| |
| hr = GetDeliveryBuffer(&pSample, NULL, NULL, 0); |
| if (FAILED(hr)) |
| goto on_error; |
| |
| pSample->GetMediaType(&pmt); |
| if (pmt) { |
| mediaType.Set(*pmt); |
| bufSize = pmt->lSampleSize; |
| } |
| |
| pSample->GetPointer(&dst_buf); |
| vi = (VIDEOINFOHEADER *)mediaType.pbFormat; |
| if (vi->rcSource.right == vi->bmiHeader.biWidth) { |
| assert(pSample->GetSize() >= size); |
| memcpy(dst_buf, buf, size); |
| } else { |
| unsigned i, bpp; |
| unsigned dststride, srcstride; |
| BYTE *src_buf = (BYTE *)buf; |
| |
| bpp = size / abs(vi->bmiHeader.biHeight) / vi->rcSource.right; |
| dststride = vi->bmiHeader.biWidth * bpp; |
| srcstride = vi->rcSource.right * bpp; |
| for (i = abs(vi->bmiHeader.biHeight); i > 0; i--) { |
| memcpy(dst_buf, src_buf, srcstride); |
| dst_buf += dststride; |
| src_buf += srcstride; |
| } |
| } |
| pSample->SetActualDataLength(size); |
| |
| hr = Deliver(pSample); |
| |
| pSample->Release(); |
| |
| on_error: |
| m_pLock->Unlock(); |
| return hr; |
| } |
| |
| SourceFilter::SourceFilter(): CBaseFilter("SourceFilter", NULL, &lock, |
| CLSID_SourceFilter) |
| { |
| HRESULT hr; |
| outPin = new OutputPin(this, &lock, &hr); |
| } |
| |
| SourceFilter::~SourceFilter() |
| { |
| } |
| |
| int SourceFilter::GetPinCount() |
| { |
| return 1; |
| } |
| |
| CBasePin* SourceFilter::GetPin(int n) |
| { |
| return outPin; |
| } |
| |
| NullRenderer::NullRenderer(HRESULT *pHr): CBaseRenderer(CLSID_NullRenderer, |
| "NullRenderer", |
| NULL, pHr) |
| { |
| input_cb = NULL; |
| } |
| |
| NullRenderer::~NullRenderer() |
| { |
| } |
| |
| HRESULT NullRenderer::CheckMediaType(const CMediaType *pmt) |
| { |
| return S_OK; |
| } |
| |
| HRESULT NullRenderer::DoRenderSample(IMediaSample *pMediaSample) |
| { |
| if (input_cb) |
| input_cb(user_data, pMediaSample); |
| |
| return S_OK; |
| } |
| |
| extern "C" IBaseFilter* NullRenderer_Create(input_callback input_cb, |
| void *user_data) |
| { |
| HRESULT hr; |
| NullRenderer *renderer = new NullRenderer(&hr); |
| renderer->AddRef(); |
| renderer->input_cb = input_cb; |
| renderer->user_data = user_data; |
| |
| return (CBaseFilter *)renderer; |
| } |
| |
| extern "C" IBaseFilter* SourceFilter_Create(SourceFilter **pSrc) |
| { |
| SourceFilter *src = new SourceFilter(); |
| src->AddRef(); |
| *pSrc = src; |
| |
| return (CBaseFilter *)src; |
| } |
| |
| extern "C" HRESULT SourceFilter_Deliver(SourceFilter *src, |
| void *buf, long size) |
| { |
| return ((OutputPin *)src->GetPin(0))->Push(buf, size); |
| } |
| |
| extern "C" void SourceFilter_SetMediaType(SourceFilter *src, |
| AM_MEDIA_TYPE *pmt) |
| { |
| ((OutputPin *)src->GetPin(0))->mediaType.Set(*pmt); |
| ((OutputPin *)src->GetPin(0))->bufSize = pmt->lSampleSize; |
| } |
| |
| |
| #endif /* PJMEDIA_VIDEO_DEV_HAS_DSHOW */ |