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BlackMagicOutput.cpp
245 lines (191 loc) · 5.98 KB
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BlackMagicOutput.cpp
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//
// BlackMagicOutput.cpp
// Lichtmaler
//
// Created by Jens Heinen on 08.10.11.
// Copyright 2011 Lichtfaktor. All rights reserved.
//
#include "BlackMagicOutput.h"
BlackMagicOutput::BlackMagicOutput()
: pDL(NULL), pDLOutput(NULL), pDLVideoFrame(NULL)
{
}
BlackMagicOutput::~BlackMagicOutput()
{
if (pDLOutput != NULL)
{
pDLOutput->DisableVideoOutput();
}
if (pDLVideoFrame != NULL)
{
pDLVideoFrame->Release();
pDLVideoFrame = NULL;
}
if (pDLOutput != NULL)
{
pDLOutput->Release();
pDLOutput = NULL;
}
if (pDL != NULL)
{
pDL->Release();
pDL = NULL;
}
}
std::string convertCfString( CFStringRef str )
{
char buffer[4096];
Boolean worked = CFStringGetCString( str, buffer, 4095, kCFStringEncodingUTF8 );
if( worked ) {
std::string result( buffer );
return result;
}
else
return std::string();
}
bool BlackMagicOutput::setup(int deviceIndex,int outputIndex)
{
bool bSuccess = FALSE;
IDeckLinkIterator* pDLIterator = NULL;
IDeckLink* deckLink = NULL;
IDeckLinkDisplayModeIterator* pDLDisplayModeIterator;
IDeckLinkDisplayMode* pDLDisplayMode = NULL;
IDeckLinkDisplayMode* displayMode = NULL;
int i=0;
pDLIterator = CreateDeckLinkIteratorInstance();
if (pDLIterator == NULL)
{
cout << "This application requires the DeckLink drivers installed. Please install the Blackmagic DeckLink drivers to use the features of this application." << endl;
goto error;
}
// List all DeckLink devices
while (pDLIterator->Next(&deckLink) == S_OK)
{
CFStringRef cfStrName;
string name;
// Get the name of this device
if (deckLink->GetModelName(&cfStrName) == S_OK){
name = convertCfString(cfStrName);
}else{
name = "DeckLink";
}
cout << "[" << i << "]Device: " << name << endl;
if (i==deviceIndex){
pDL = deckLink; //found the device
}
i++;
}
if (i == 0){
cout << "You will not be able to use the features of this application until a Blackmagic device is installed. This application requires at least one Blackmagic device." << endl;
goto error;
}
//get output device
if (pDL->QueryInterface(IID_IDeckLinkOutput, (void**)&pDLOutput) != S_OK){
cout << "Unable to get Blackmagic Outputdevice" << endl;
goto error;
}
// list video modes for Output
cout << "Blackmagic Output Modes:" << endl;
if (pDLOutput->GetDisplayModeIterator(&pDLDisplayModeIterator) == S_OK)
{
int i=0;
while (pDLDisplayModeIterator->Next(&displayMode) == S_OK)
{
CFStringRef modeName;
displayMode->GetName(&modeName);
cout << "[" << i << "] " << convertCfString(modeName) << endl;
if (i==outputIndex){
pDLDisplayMode=displayMode; //found the proper displaymode
}
i++;
}
pDLDisplayModeIterator->Release();
}else{
cout << "Couldn't list Blackmagic Output modes." << endl;
}
mWidth = pDLDisplayMode->GetWidth();
mHeight = pDLDisplayMode->GetHeight();
if (pDLOutput->EnableVideoOutput(pDLDisplayMode->GetDisplayMode(), bmdVideoOutputFlagDefault) != S_OK){
cout << "Unable to enable Blackmagic Videooutput" << endl;
goto error;
}
// Flip frame vertical, because OpenGL rendering starts from left bottom corner
if (pDLOutput->CreateVideoFrame(mWidth, mHeight, mWidth*4, bmdFormat8BitBGRA, bmdFrameFlagFlipVertical, &pDLVideoFrame) != S_OK){
cout << "Unable to create Blackmagic Video Frame" << endl;
goto error;
}
bSuccess = true;
error:
if (!bSuccess)
{
if (pDLOutput != NULL)
{
pDLOutput->Release();
pDLOutput = NULL;
}
if (pDL != NULL)
{
pDL->Release();
pDL = NULL;
}
}
if (pDLIterator != NULL)
{
pDLIterator->Release();
pDLIterator = NULL;
}
return bSuccess;
}
/*
bool BlackMagicOutput::InitGUI(IDeckLinkScreenPreviewCallback *previewCallback)
{
// Set preview
if (previewCallback != NULL)
{
pDLOutput->SetScreenPreviewCallback(previewCallback);
}
return true;
}
bool BlackMagicOutput::InitOpenGL()
{
const GLubyte * strExt;
GLboolean isFBO;
CGLSetCurrentContext (contextObj);
strExt = glGetString (GL_EXTENSIONS);
isFBO = gluCheckExtension ((const GLubyte*)"GL_EXT_framebuffer_object", strExt);
if (!isFBO)
{
NSRunAlertPanel(@"OpenGL initialization error.", @"OpenGL extention \"GL_EXT_framebuffer_object\" is not supported.", @"OK", nil, nil);
return false;
}
return true;
}*/
void BlackMagicOutput::renderToDevice(ofFbo outputFrameBuffer)
{
if (outputFrameBuffer.getWidth()!=mWidth || outputFrameBuffer.getHeight()!=mHeight){
cout << "Output Format is different from frameBuffer to output." << endl;
//TODO scale framebuffer instead of returning
return;
}
void* pFrame;
pDLVideoFrame->GetBytes((void**)&pFrame);
outputFrameBuffer.begin();
glReadPixels(0, 0, mWidth, mHeight, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pFrame); //read frame buffer to decklickvideoframe
pDLOutput->DisplayVideoFrameSync(pDLVideoFrame); //display video
outputFrameBuffer.end();
}
void BlackMagicOutput::renderToDevice(ofTexture outputFrameBuffer)
{
if (outputFrameBuffer.getWidth()!=mWidth || outputFrameBuffer.getHeight()!=mHeight){
cout << "Output Format is different from frameBuffer to output." << endl;
//TODO scale framebuffer instead of returning
return;
}
void* pFrame;
pDLVideoFrame->GetBytes((void**)&pFrame);
outputFrameBuffer.bind();
glGetTexImage(outputFrameBuffer.texData.textureTarget ,0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pFrame);
//glReadPixels(0, 0, mWidth, mHeight, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pFrame); //read frame buffer to decklickvideoframe
pDLOutput->DisplayVideoFrameSync(pDLVideoFrame); //display video
outputFrameBuffer.unbind();
}