Method doLoadTextureFromImage

piomxtextures_src/openmaxiltextureloader.cpp:119–375

------------------------------------------------------------------------------ | OpenMAXILTextureLoader::loadTexture +-----------------------------------------------------------------------------*/

|    OpenMAXILTextureLoader::loadTexture
+-----------------------------------------------------------------------------*/
inline
void OpenMAXILTextureLoader::doLoadTextureFromImage(
        QString fileAbsPath,
        EGLDisplay eglDisplay,
        EGLContext eglContext,
        GLuint& texture
        )
{
    QFile file(fileAbsPath);
    if (!file.exists())
        throw runtime_error("File does not exist.");
    if (!file.open(QIODevice::ReadOnly))
        throw runtime_error("Failed to open file.");

    core = OMX_Core::instance();
    Q_UNUSED(core);

    // Get components.
    compImageDecoder = OMXComponentFactory<OMXComponent>::getInstance("OMX.broadcom.image_decode");
    compEGLRender    = OMXComponentFactory<OMXComponent>::getInstance("OMX.broadcom.egl_render");

    // Check the number of ports is correct.
    OMX_PORT_PARAM_TYPE port;
    port.nSize = sizeof(OMX_PORT_PARAM_TYPE);
    port.nVersion.nVersion = OMX_VERSION;
    compImageDecoder->GetParameter(OMX_IndexParamImageInit, &port);
    if (port.nPorts != 2)
        throw runtime_error("Unexpected number of ports returned from decoder.");
    m_iInPortDecode  = port.nStartPortNumber;
    m_iOutPortDecode = port.nStartPortNumber + 1;

    compEGLRender->GetParameter(OMX_IndexParamVideoInit, &port);
    if (port.nPorts != 2)
        throw runtime_error("Unexpected number of ports returned from renderer.");
    m_iInPortRender  = port.nStartPortNumber;
    m_iOutPortRender = port.nStartPortNumber + 1;

    // Disable all ports.
    LOG_VERBOSE(LOG_TAG, "Disabling all the ports...");
    compImageDecoder->sendCommand(OMX_CommandPortDisable, m_iInPortDecode, NULL);
    compImageDecoder->waitForEvent(OMX_EventCmdComplete, OMX_CommandPortDisable, m_iInPortDecode, TIMEOUT_MS);
    compImageDecoder->sendCommand(OMX_CommandPortDisable, m_iOutPortDecode, NULL);
    compImageDecoder->waitForEvent(OMX_EventCmdComplete, OMX_CommandPortDisable, m_iOutPortDecode, TIMEOUT_MS);
    compEGLRender->sendCommand(OMX_CommandPortDisable, m_iInPortRender, NULL);
    compEGLRender->waitForEvent(OMX_EventCmdComplete, OMX_CommandPortDisable, m_iInPortRender, TIMEOUT_MS);
    compEGLRender->sendCommand(OMX_CommandPortDisable, m_iOutPortRender, NULL);
    compEGLRender->waitForEvent(OMX_EventCmdComplete, OMX_CommandPortDisable, m_iOutPortRender, TIMEOUT_MS);
    LOG_VERBOSE(LOG_TAG, "All the ports were disabled.");

    // move decoder component into idle state
    LOG_VERBOSE(LOG_TAG, "Changing decoder state to IDLE...");
    compImageDecoder->sendCommand(OMX_CommandStateSet, OMX_StateIdle, NULL);
    compImageDecoder->waitForEvent(OMX_EventCmdComplete, OMX_CommandStateSet, OMX_StateIdle, TIMEOUT_MS);
    LOG_VERBOSE(LOG_TAG, "Decoder state changed to IDLE.");

    // Set input format.
    OMX_IMAGE_PARAM_PORTFORMATTYPE portFormat;
    OMX_INIT_STRUCTURE(portFormat);