Exemple #1
0
/**
 * VFW frame grab callback function
 */
static LRESULT PASCAL camera_grabber_callback(HWND hWnd, LPVIDEOHDR lpVHdr)
{
#define PNG_HEADER_SIZE (1000)
    int i;
    char* pOutput;
    int copyLineBytes;

    /* Free previous frame buffer */
    if (NULL != _pFrameBuffer) {
        FREE(_pFrameBuffer);
        _pFrameBuffer = NULL;
    }

    /* Free encoding buffer */
    if (NULL != _pEncodingBuffer) {
        FREE(_pEncodingBuffer);
        _pEncodingBuffer = NULL;
    }

    /* Grab current frame */
    if (JAVACALL_TRUE == _grabFrame) {
        copyLineBytes = (_grabWidth * 3);
        
        _pFrameBuffer = MALLOC(lpVHdr->dwBytesUsed);
        _pEncodingBuffer = 
            MALLOC(javautil_media_get_png_size(_grabWidth, _grabHeight));
        
        if (_pFrameBuffer && _pEncodingBuffer) {
            pOutput = _pFrameBuffer;
            /* Impl note: - Top / Bottom Reverse */
            for (i = _grabHeight - 1; i >= 0; --i) {
                memcpy(pOutput, lpVHdr->lpData + (i * copyLineBytes), copyLineBytes);
                pOutput += copyLineBytes;
            }

            _encodingDataSize = javautil_media_rgb_to_png(
                _pFrameBuffer, _pEncodingBuffer, _grabWidth, _grabHeight);
            javanotify_on_media_notification(JAVACALL_EVENT_MEDIA_SNAPSHOT_FINISHED,
                                             _playerId, 0);

        } else {
            if (_pFrameBuffer) {
                FREE(_pFrameBuffer);
                _pFrameBuffer = NULL;
            }
            if (_pEncodingBuffer) {
                FREE(_pEncodingBuffer);
                _pEncodingBuffer = NULL;
            }
        }
        _grabFrame = JAVACALL_FALSE;
    }

    InvalidateRect(GET_MCIWND_HWND(), NULL, FALSE);
    return 0;
}
Exemple #2
0
static javacall_result convertPNG(javacall_image_filter_handle ifHandle,
                                  javacall_amms_frame* pInput,
                                  javacall_amms_frame** ppOutput)
{
    javacall_amms_frame_RGB32* pData;
    int width, height;
    int outLength;

    javacall_amms_frame* pOutput;

    if (ppOutput == NULL)
        return JAVACALL_INVALID_ARGUMENT;
    *ppOutput = NULL;

    if ((ifHandle == NULL) || (pInput == NULL) ||
            (pInput->extType != JAVACALL_AMMS_ET_RGB32_DATA))
        return JAVACALL_INVALID_ARGUMENT;

    pData = (javacall_amms_frame_RGB32*)pInput;

    width = pData->width;
    height = pData->height;

    pOutput = javacall_amms_create_frame_raw_in(
                    javautil_media_get_png_size(width, height));
    if (!pOutput)
        return JAVACALL_OUT_OF_MEMORY;

    outLength = javautil_media_rgbX888_to_png((unsigned char*)pData->raw.bufferData,
                    (unsigned char*)pOutput->bufferData, width, height);

    if (outLength <= 0) {
        javacall_amms_release_frame(pOutput);
        return JAVACALL_FAIL;
    } else pOutput->bufferLength = outLength;

    *ppOutput = pOutput;
    return JAVACALL_OK;
}