dshowvideosrc: converts code to C++

1 files changed, 1047 insertions, 0 deletions

diff --git a/sys/dshowsrcwrapper/gstdshowvideosrc.cpp b/sys/dshowsrcwrapper/gstdshowvideosrc.cpp
new file mode 100755
index 00000000..67e70d96
--- /dev/null
+++ b/sys/dshowsrcwrapper/gstdshowvideosrc.cpp
@@ -0,0 +1,1047 @@
+/* GStreamer
+ * Copyright (C)  2007 Sebastien Moutte <sebastien@moutte.net>
+ *
+ * gstdshowvideosrc.c: 
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstdshowvideosrc.h"
+
+static const GstElementDetails gst_dshowvideosrc_details =
+GST_ELEMENT_DETAILS ("DirectShow video capture source",
+    "Source/Video",
+    "Receive data from a directshow video capture graph",
+    "Sebastien Moutte <sebastien@moutte.net>");
+
+GST_DEBUG_CATEGORY_STATIC (dshowvideosrc_debug);
+#define GST_CAT_DEFAULT dshowvideosrc_debug
+
+const GUID MEDIASUBTYPE_I420
+    = { 0x30323449, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B,
+    0x71}
+};
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-rgb,"
+        "bpp = (int) 24,"
+        "depth = (int) 24,"
+        "width = (int) [ 1, MAX ],"
+        "height = (int) [ 1, MAX ],"
+        "framerate = (fraction) [ 0, MAX ];"
+        "video/x-dv,"
+        "systemstream = (boolean) FALSE,"
+        "width = (int) [ 1, MAX ],"
+        "height = (int) [ 1, MAX ],"
+        "framerate = (fraction) [ 0, MAX ],"
+        "format = (fourcc) dvsd;"
+        "video/x-dv,"
+        "systemstream = (boolean) TRUE;"
+        "video/x-raw-yuv,"
+        "width = (int) [ 1, MAX ],"
+        "height = (int) [ 1, MAX ],"
+        "framerate = (fraction) [ 0, MAX ]," "format = (fourcc) I420")
+    );
+
+static void gst_dshowvideosrc_init_interfaces (GType type);
+
+GST_BOILERPLATE_FULL (GstDshowVideoSrc, gst_dshowvideosrc, GstPushSrc,
+    GST_TYPE_PUSH_SRC, gst_dshowvideosrc_init_interfaces);
+
+enum
+{
+  PROP_0,
+  PROP_DEVICE,
+  PROP_DEVICE_NAME
+};
+
+static void gst_dshowvideosrc_probe_interface_init (GstPropertyProbeInterface *
+    iface);
+static const GList *gst_dshowvideosrc_probe_get_properties (GstPropertyProbe *
+    probe);
+static GValueArray *gst_dshowvideosrc_probe_get_values (GstPropertyProbe *
+    probe, guint prop_id, const GParamSpec * pspec);
+static GValueArray *gst_dshowvideosrc_get_device_name_values (GstDshowVideoSrc *
+    src);
+static gboolean gst_dshowvideosrc_probe_needs_probe (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec);
+static void gst_dshowvideosrc_probe_probe_property (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec);
+
+
+static void gst_dshowvideosrc_dispose (GObject * gobject);
+static void gst_dshowvideosrc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_dshowvideosrc_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+static GstCaps *gst_dshowvideosrc_get_caps (GstBaseSrc * src);
+static GstStateChangeReturn gst_dshowvideosrc_change_state (GstElement *
+    element, GstStateChange transition);
+
+
+static gboolean gst_dshowvideosrc_start (GstBaseSrc * bsrc);
+static gboolean gst_dshowvideosrc_stop (GstBaseSrc * bsrc);
+static gboolean gst_dshowvideosrc_unlock (GstBaseSrc * bsrc);
+static gboolean gst_dshowvideosrc_unlock_stop (GstBaseSrc * bsrc);
+static gboolean gst_dshowvideosrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps);
+static GstCaps *gst_dshowvideosrc_get_caps (GstBaseSrc * bsrc);
+static GstFlowReturn gst_dshowvideosrc_create (GstPushSrc * psrc,
+    GstBuffer ** buf);
+
+/*utils*/
+static GstCaps *gst_dshowvideosrc_getcaps_from_streamcaps (GstDshowVideoSrc *
+    src, IPin * pin, IAMStreamConfig * streamcaps);
+static gboolean gst_dshowvideosrc_push_buffer (byte * buffer, long size,
+    byte * src_object, UINT64 start, UINT64 stop);
+
+static void
+gst_dshowvideosrc_init_interfaces (GType type)
+{
+  static const GInterfaceInfo dshowvideosrc_info = {
+    (GInterfaceInitFunc) gst_dshowvideosrc_probe_interface_init,
+    NULL,
+    NULL,
+  };
+
+  g_type_add_interface_static (type,
+      GST_TYPE_PROPERTY_PROBE, &dshowvideosrc_info);
+}
+
+static void
+gst_dshowvideosrc_probe_interface_init (GstPropertyProbeInterface * iface)
+{
+  iface->get_properties = gst_dshowvideosrc_probe_get_properties;
+  iface->needs_probe = gst_dshowvideosrc_probe_needs_probe;
+  iface->probe_property = gst_dshowvideosrc_probe_probe_property;
+  iface->get_values = gst_dshowvideosrc_probe_get_values;
+}
+
+static void
+gst_dshowvideosrc_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+
+  gst_element_class_set_details (element_class, &gst_dshowvideosrc_details);
+}
+
+static void
+gst_dshowvideosrc_class_init (GstDshowVideoSrcClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseSrcClass *gstbasesrc_class;
+  GstPushSrcClass *gstpushsrc_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasesrc_class = (GstBaseSrcClass *) klass;
+  gstpushsrc_class = (GstPushSrcClass *) klass;
+
+  gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_dispose);
+  gobject_class->set_property =
+      GST_DEBUG_FUNCPTR (gst_dshowvideosrc_set_property);
+  gobject_class->get_property =
+      GST_DEBUG_FUNCPTR (gst_dshowvideosrc_get_property);
+
+  gstelement_class->change_state =
+      GST_DEBUG_FUNCPTR (gst_dshowvideosrc_change_state);
+
+  gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_get_caps);
+  gstbasesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_set_caps);
+  gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_start);
+  gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_stop);
+  gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_unlock);
+  gstbasesrc_class->unlock_stop =
+      GST_DEBUG_FUNCPTR (gst_dshowvideosrc_unlock_stop);
+
+  gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_create);
+
+  g_object_class_install_property
+      (gobject_class, PROP_DEVICE,
+      g_param_spec_string ("device", "Device",
+          "Directshow device path (@..classID/name)", NULL, 
+          static_cast<GParamFlags>(G_PARAM_READWRITE)));
+
+  g_object_class_install_property
+      (gobject_class, PROP_DEVICE_NAME,
+      g_param_spec_string ("device-name", "Device name",
+          "Human-readable name of the sound device", NULL, 
+          static_cast<GParamFlags>(G_PARAM_READWRITE)));
+
+  GST_DEBUG_CATEGORY_INIT (dshowvideosrc_debug, "dshowvideosrc", 0,
+      "Directshow video source");
+
+}
+
+static void
+gst_dshowvideosrc_init (GstDshowVideoSrc * src, GstDshowVideoSrcClass * klass)
+{
+  src->device = NULL;
+  src->device_name = NULL;
+  src->video_cap_filter = NULL;
+  src->dshow_fakesink = NULL;
+  src->media_filter = NULL;
+  src->filter_graph = NULL;
+  src->caps = NULL;
+  src->pins_mediatypes = NULL;
+  src->is_rgb = FALSE;
+
+  src->buffer_cond = g_cond_new ();
+  src->buffer_mutex = g_mutex_new ();
+  src->buffer = NULL;
+  src->stop_requested = FALSE;
+
+  CoInitializeEx (NULL, COINIT_MULTITHREADED);
+
+  gst_base_src_set_live (GST_BASE_SRC (src), TRUE);
+}
+
+static void
+gst_dshowvideosrc_dispose (GObject * gobject)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (gobject);
+
+  if (src->device) {
+    g_free (src->device);
+    src->device = NULL;
+  }
+
+  if (src->device_name) {
+    g_free (src->device_name);
+    src->device_name = NULL;
+  }
+
+  if (src->caps) {
+    gst_caps_unref (src->caps);
+    src->caps = NULL;
+  }
+
+  if (src->pins_mediatypes) {
+    gst_dshow_free_pins_mediatypes (src->pins_mediatypes);
+    src->pins_mediatypes = NULL;
+  }
+
+  /* clean dshow */
+  if (src->video_cap_filter) {
+    src->video_cap_filter->Release();
+    src->video_cap_filter = NULL;
+  }
+
+  if (src->buffer_mutex) {
+    g_mutex_free (src->buffer_mutex);
+    src->buffer_mutex = NULL;
+  }
+
+  if (src->buffer_cond) {
+    g_cond_free (src->buffer_cond);
+    src->buffer_cond = NULL;
+  }
+
+  if (src->buffer) {
+    gst_buffer_unref (src->buffer);
+    src->buffer = NULL;
+  }
+
+  CoUninitialize ();
+
+  G_OBJECT_CLASS (parent_class)->dispose (gobject);
+}
+
+static gboolean
+gst_dshowvideosrc_probe_needs_probe (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec)
+{
+  static gboolean init = FALSE;
+  gboolean ret = FALSE;
+
+  if (!init) {
+    ret = TRUE;
+    init = TRUE;
+  }
+
+  return ret;
+}
+
+static void
+gst_dshowvideosrc_probe_probe_property (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec)
+{
+  GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
+
+  switch (prop_id) {
+    case PROP_DEVICE_NAME:
+      //gst_v4l_class_probe_devices (klass, FALSE);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+      break;
+  }
+}
+
+static const GList *
+gst_dshowvideosrc_probe_get_properties (GstPropertyProbe * probe)
+{
+  GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
+  static GList *props = NULL;
+
+  if (!props) {
+    GParamSpec *pspec;
+
+    pspec = g_object_class_find_property (klass, "device-name");
+    props = g_list_append (props, pspec);
+  }
+
+  return props;
+}
+
+static GValueArray *
+gst_dshowvideosrc_get_device_name_values (GstDshowVideoSrc * src)
+{
+  GValueArray *array = g_value_array_new (0);
+  GValue value = { 0 };
+  ICreateDevEnum *devices_enum = NULL;
+  IEnumMoniker *moniker_enum = NULL;
+  IMoniker *moniker = NULL;
+  HRESULT hres = S_FALSE;
+  ULONG fetched;
+
+  g_value_init (&value, G_TYPE_STRING);
+
+  hres = CoCreateInstance (CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
+      IID_ICreateDevEnum, (LPVOID *) &devices_enum);
+  if (hres != S_OK) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't create an instance of the system device enumerator (error=%d)",
+        hres);
+    array = NULL;
+    goto clean;
+  }
+
+  hres = devices_enum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, 
+    &moniker_enum, 0);
+  if (hres != S_OK || !moniker_enum) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't get enumeration of video devices (error=%d)", hres);
+    array = NULL;
+    goto clean;
+  }
+
+  moniker_enum->Reset();
+
+  while (hres = moniker_enum->Next(1, &moniker, &fetched),
+      hres == S_OK) {
+    IPropertyBag *property_bag = NULL;
+
+    hres =
+      moniker->BindToStorage(NULL, NULL, IID_IPropertyBag,
+        (LPVOID *) &property_bag);
+    if (SUCCEEDED (hres) && property_bag) {
+      VARIANT varFriendlyName;
+
+      VariantInit (&varFriendlyName);
+      hres = property_bag->Read(L"FriendlyName", &varFriendlyName, NULL);
+      if (hres == S_OK && varFriendlyName.bstrVal) {
+        gchar *friendly_name =
+            g_utf16_to_utf8 ((const gunichar2 *) varFriendlyName.bstrVal,
+            wcslen (varFriendlyName.bstrVal), NULL, NULL, NULL);
+
+        g_value_set_string (&value, friendly_name);
+        g_value_array_append (array, &value);
+        g_value_unset (&value);
+        g_free (friendly_name);
+        SysFreeString (varFriendlyName.bstrVal);
+      }
+      property_bag->Release();
+    }
+    moniker->Release();
+  }
+
+clean:
+  if (moniker_enum)
+    moniker_enum->Release();
+
+  if (devices_enum)
+    devices_enum->Release();
+
+  return array;
+}
+
+static GValueArray *
+gst_dshowvideosrc_probe_get_values (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (probe);
+  GValueArray *array = NULL;
+
+  switch (prop_id) {
+    case PROP_DEVICE_NAME:
+      array = gst_dshowvideosrc_get_device_name_values (src);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+      break;
+  }
+
+  return array;
+}
+
+static void
+gst_dshowvideosrc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (object);
+
+  switch (prop_id) {
+    case PROP_DEVICE:
+    {
+      if (src->device) {
+        g_free (src->device);
+        src->device = NULL;
+      }
+      if (g_value_get_string (value)) {
+        src->device = g_strdup (g_value_get_string (value));
+      }
+      break;
+    }
+    case PROP_DEVICE_NAME:
+    {
+      if (src->device_name) {
+        g_free (src->device_name);
+        src->device_name = NULL;
+      }
+      if (g_value_get_string (value)) {
+        src->device_name = g_strdup (g_value_get_string (value));
+      }
+      break;
+    }
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_dshowvideosrc_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+
+}
+
+static GstCaps *
+gst_dshowvideosrc_get_caps (GstBaseSrc * basesrc)
+{
+  HRESULT hres = S_OK;
+  IBindCtx *lpbc = NULL;
+  IMoniker *videom;
+  DWORD dwEaten;
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (basesrc);
+  gunichar2 *unidevice = NULL;
+
+  if (src->device) {
+    g_free (src->device);
+    src->device = NULL;
+  }
+
+  src->device =
+      gst_dshow_getdevice_from_devicename (&CLSID_VideoInputDeviceCategory,
+      &src->device_name);
+  if (!src->device) {
+    GST_CAT_ERROR (dshowvideosrc_debug, "No video device found.");
+    return NULL;
+  }
+  unidevice =
+      g_utf8_to_utf16 (src->device, strlen (src->device), NULL, NULL, NULL);
+
+  if (!src->video_cap_filter) {
+    hres = CreateBindCtx (0, &lpbc);
+    if (SUCCEEDED (hres)) {
+      hres = MkParseDisplayName (lpbc, (LPCOLESTR) unidevice, &dwEaten, &videom);
+      if (SUCCEEDED (hres)) {
+        hres = videom->BindToObject(lpbc, NULL, IID_IBaseFilter, 
+          (LPVOID *) &src->video_cap_filter);
+        videom->Release();
+      }
+      lpbc->Release();
+    }
+  }
+
+  if (!src->caps) {
+    src->caps = gst_caps_new_empty ();
+  }
+
+  if (src->video_cap_filter && gst_caps_is_empty (src->caps)) {
+    /* get the capture pins supported types */
+    IPin *capture_pin = NULL;
+    IEnumPins *enumpins = NULL;
+    HRESULT hres;
+
+    hres = src->video_cap_filter->EnumPins(&enumpins);
+    if (SUCCEEDED (hres)) {
+      while (enumpins->Next(1, &capture_pin, NULL) == S_OK) {
+        IKsPropertySet *pKs = NULL;
+        hres = capture_pin->QueryInterface(IID_IKsPropertySet, (LPVOID *) &pKs);
+        if (SUCCEEDED (hres) && pKs) {
+          DWORD cbReturned;
+          GUID pin_category;
+          RPC_STATUS rpcstatus;
+
+          hres =
+              pKs->Get(AMPROPSETID_Pin,
+              AMPROPERTY_PIN_CATEGORY, NULL, 0, &pin_category, sizeof (GUID),
+              &cbReturned);
+
+          /* we only want capture pins */
+          if (UuidCompare (&pin_category, (UUID *) &PIN_CATEGORY_CAPTURE,
+                  &rpcstatus) == 0) {
+            IAMStreamConfig *streamcaps = NULL;
+
+            if (SUCCEEDED (capture_pin->QueryInterface(
+                        IID_IAMStreamConfig, (LPVOID *) &streamcaps))) {
+              GstCaps *caps =
+                  gst_dshowvideosrc_getcaps_from_streamcaps (src, capture_pin,
+                  streamcaps);
+
+              if (caps) {
+                gst_caps_append (src->caps, caps);
+              }
+              streamcaps->Release();
+            }
+          }
+
+          pKs->Release();
+        }
+
+        capture_pin->Release();
+      }
+      enumpins->Release();
+    }
+  }
+
+  if (unidevice) {
+    g_free (unidevice);
+  }
+
+  if (src->caps) {
+    GST_CAT_LOG (dshowvideosrc_debug, "getcaps returned %s",
+        gst_caps_to_string (src->caps));
+    return gst_caps_ref (src->caps);
+  }
+
+  return NULL;
+}
+
+static GstStateChangeReturn
+gst_dshowvideosrc_change_state (GstElement * element, GstStateChange transition)
+{
+  HRESULT hres = S_FALSE;
+  IAMVfwCaptureDialogs *dialog = NULL;
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+      if (src->media_filter)
+        hres = src->media_filter->Run(0);
+      if (hres != S_OK) {
+        GST_CAT_ERROR (dshowvideosrc_debug,
+            "Can't RUN the directshow capture graph (error=%d)", hres);
+        return GST_STATE_CHANGE_FAILURE;
+      }
+      break;
+    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+      if (src->media_filter)
+        hres = src->media_filter->Stop();
+      if (hres != S_OK) {
+        GST_CAT_ERROR (dshowvideosrc_debug,
+            "Can't STOP the directshow capture graph (error=%d)", hres);
+        return GST_STATE_CHANGE_FAILURE;
+      }
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      break;
+  }
+
+  return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+}
+
+static gboolean
+gst_dshowvideosrc_start (GstBaseSrc * bsrc)
+{
+  HRESULT hres = S_FALSE;
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
+
+  hres = CoCreateInstance (CLSID_FilterGraph, NULL, CLSCTX_INPROC,
+      IID_IFilterGraph, (LPVOID *) & src->filter_graph);
+  if (hres != S_OK || !src->filter_graph) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't create an instance of the dshow graph manager (error=%d)", hres);
+    goto error;
+  }
+
+  hres = src->filter_graph->QueryInterface(IID_IMediaFilter, 
+    (LPVOID *) &src->media_filter);
+  if (hres != S_OK || !src->media_filter) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't get IMediacontrol interface from the graph manager (error=%d)",
+        hres);
+    goto error;
+  }
+
+  hres = CoCreateInstance (CLSID_DshowFakeSink, NULL, CLSCTX_INPROC,
+      IID_IBaseFilter, (LPVOID *) & src->dshow_fakesink);
+  if (hres != S_OK || !src->dshow_fakesink) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't create an instance of our dshow fakesink filter (error=0x%x)",
+        hres);
+    goto error;
+  }
+
+  hres = src->filter_graph->AddFilter(src->video_cap_filter, L"capture");
+  if (hres != S_OK) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't add video capture filter to the graph (error=%d)", hres);
+    goto error;
+  }
+
+  hres = src->filter_graph->AddFilter(src->dshow_fakesink, L"sink");
+  if (hres != S_OK) {
+    GST_CAT_ERROR (dshowvideosrc_debug,
+        "Can't add our fakesink filter to the graph (error=%d)", hres);
+    goto error;
+  }
+
+  return TRUE;
+
+error:
+  if (src->dshow_fakesink) {
+    src->dshow_fakesink->Release();
+    src->dshow_fakesink = NULL;
+  }
+
+  if (src->media_filter) {
+    src->media_filter->Release();
+    src->media_filter = NULL;
+  }
+  if (src->filter_graph) {
+    src->filter_graph->Release();
+    src->filter_graph = NULL;
+  }
+
+  return FALSE;
+}
+
+static gboolean
+gst_dshowvideosrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
+{
+  HRESULT hres;
+  IGstDshowInterface *srcinterface = NULL;
+  IPin *input_pin = NULL;
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
+  GstStructure *s = gst_caps_get_structure (caps, 0);
+
+  /* search the negociated caps in our caps list to get its index and the corresponding mediatype */
+  if (gst_caps_is_subset (caps, src->caps)) {
+    guint i = 0;
+    gint res = -1;
+
+    for (; i < gst_caps_get_size (src->caps) && res == -1; i++) {
+      GstCaps *capstmp = gst_caps_copy_nth (src->caps, i);
+
+      if (gst_caps_is_subset (caps, capstmp)) {
+        res = i;
+      }
+      gst_caps_unref (capstmp);
+    }
+
+    if (res != -1 && src->pins_mediatypes) {
+      /* get the corresponding media type and build the dshow graph */
+      GstCapturePinMediaType *pin_mediatype = NULL;
+      gchar *caps_string = NULL;
+      GList *type = g_list_nth (src->pins_mediatypes, res);
+
+      if (type) {
+        pin_mediatype = (GstCapturePinMediaType *) type->data;
+
+        hres = src->dshow_fakesink->QueryInterface(
+            IID_IGstDshowInterface, (LPVOID *) &srcinterface);
+
+        if (hres != S_OK || !srcinterface) {
+          GST_CAT_ERROR (dshowvideosrc_debug,
+              "Can't get IGstDshowInterface interface from our dshow fakesink filter (error=%d)",
+              hres);
+          goto error;
+        }
+
+        srcinterface->gst_set_media_type(pin_mediatype->mediatype);
+        srcinterface->gst_set_buffer_callback(
+          (push_buffer_func) gst_dshowvideosrc_push_buffer, (byte *) src);
+
+        if (srcinterface)
+          srcinterface->Release();
+
+        gst_dshow_get_pin_from_filter (src->dshow_fakesink, PINDIR_INPUT,
+            &input_pin);
+        if (!input_pin) {
+          GST_CAT_ERROR (dshowvideosrc_debug,
+              "Can't get input pin from our dshow fakesink");
+          goto error;
+        }
+
+        hres = src->filter_graph->ConnectDirect(pin_mediatype->capture_pin, 
+          input_pin, NULL);
+        input_pin->Release();
+
+        if (hres != S_OK) {
+          GST_CAT_ERROR (dshowvideosrc_debug,
+              "Can't connect capture filter with fakesink filter (error=%d)",
+              hres);
+          goto error;
+        }
+
+        /* save width and height negociated */
+        gst_structure_get_int (s, "width", &src->width);
+        gst_structure_get_int (s, "height", &src->height);
+
+        src->is_rgb = FALSE;
+        caps_string = gst_caps_to_string (caps);
+        if (caps_string) {
+          if (strstr (caps_string, "video/x-raw-rgb")) {
+            src->is_rgb = TRUE;
+          } else {
+            src->is_rgb = FALSE;
+          }
+          g_free (caps_string);
+        }
+      }
+    }
+  }
+
+  return TRUE;
+
+error:
+  if (srcinterface)
+    srcinterface->Release();
+
+  return FALSE;
+}
+
+static gboolean
+gst_dshowvideosrc_stop (GstBaseSrc * bsrc)
+{
+  IPin *input_pin = NULL, *output_pin = NULL;
+  HRESULT hres = S_FALSE;
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
+
+  if (!src->filter_graph)
+    return TRUE;
+
+  /* disconnect filters */
+  gst_dshow_get_pin_from_filter (src->video_cap_filter, PINDIR_OUTPUT,
+      &output_pin);
+  if (output_pin) {
+    hres = src->filter_graph->Disconnect(output_pin);
+    output_pin->Release();
+  }
+
+  gst_dshow_get_pin_from_filter (src->dshow_fakesink, PINDIR_INPUT, &input_pin);
+  if (input_pin) {
+    hres = src->filter_graph->Disconnect(input_pin);
+    input_pin->Release();
+  }
+
+  /*remove filters from the graph */
+  src->filter_graph->RemoveFilter(src->video_cap_filter);
+  src->filter_graph->RemoveFilter(src->dshow_fakesink);
+
+  /*release our gstreamer dshow sink */
+  src->dshow_fakesink->Release();
+  src->dshow_fakesink = NULL;
+
+  /*release media filter interface */
+  src->media_filter->Release();
+  src->media_filter = NULL;
+
+  /*release the filter graph manager */
+  src->filter_graph->Release();
+  src->filter_graph = NULL;
+
+  return TRUE;
+}
+
+static gboolean
+gst_dshowvideosrc_unlock (GstBaseSrc * bsrc)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
+
+  g_mutex_lock (src->buffer_mutex);
+  src->stop_requested = TRUE;
+  g_cond_signal (src->buffer_cond);
+  g_mutex_unlock (src->buffer_mutex);
+
+  return TRUE;
+}
+
+static gboolean
+gst_dshowvideosrc_unlock_stop (GstBaseSrc * bsrc)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
+
+  src->stop_requested = FALSE;
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_dshowvideosrc_create (GstPushSrc * psrc, GstBuffer ** buf)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (psrc);
+
+  g_mutex_lock (src->buffer_mutex);
+  while (src->buffer == NULL && !src->stop_requested)
+    g_cond_wait (src->buffer_cond, src->buffer_mutex);
+  *buf = src->buffer;
+  src->buffer = NULL;
+  g_mutex_unlock (src->buffer_mutex);
+
+  if (src->stop_requested) {
+    if (*buf != NULL) {
+      gst_buffer_unref (*buf);
+      *buf = NULL;
+    }
+    return GST_FLOW_WRONG_STATE;
+  }
+
+  GST_CAT_DEBUG (dshowvideosrc_debug,
+      "dshowvideosrc_create => pts %" GST_TIME_FORMAT " duration %"
+      GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (*buf)),
+      GST_TIME_ARGS (GST_BUFFER_DURATION (*buf)));
+
+  return GST_FLOW_OK;
+}
+
+static GstCaps *
+gst_dshowvideosrc_getcaps_from_streamcaps (GstDshowVideoSrc * src, IPin * pin,
+    IAMStreamConfig * streamcaps)
+{
+  GstCaps *caps = NULL;
+  HRESULT hres = S_OK;
+  RPC_STATUS rpcstatus;
+  int icount = 0;
+  int isize = 0;
+  VIDEO_STREAM_CONFIG_CAPS vscc;
+  int i = 0;
+
+  if (!streamcaps)
+    return NULL;
+
+  streamcaps->GetNumberOfCapabilities(&icount, &isize);
+
+  if (isize != sizeof (vscc))
+    return NULL;
+
+  for (; i < icount; i++) {
+    GstCapturePinMediaType *pin_mediatype = g_new0 (GstCapturePinMediaType, 1);
+
+    pin->AddRef();
+    pin_mediatype->capture_pin = pin;
+
+    hres = streamcaps->GetStreamCaps(i, &pin_mediatype->mediatype, (BYTE *) & vscc);
+    if (hres == S_OK && pin_mediatype->mediatype) {
+      VIDEOINFOHEADER *video_info;
+      GstCaps *mediacaps = NULL;
+
+      if (!caps)
+        caps = gst_caps_new_empty ();
+
+      /* I420 */
+      if ((UuidCompare (&pin_mediatype->mediatype->subtype, (UUID *) &MEDIASUBTYPE_I420,
+                  &rpcstatus) == 0 && rpcstatus == RPC_S_OK)
+          && (UuidCompare (&pin_mediatype->mediatype->formattype,
+                  (UUID *) &FORMAT_VideoInfo, &rpcstatus) == 0
+              && rpcstatus == RPC_S_OK)) {
+        video_info = (VIDEOINFOHEADER *) pin_mediatype->mediatype->pbFormat;
+
+        mediacaps = gst_caps_new_simple ("video/x-raw-yuv",
+            "width", G_TYPE_INT, video_info->bmiHeader.biWidth,
+            "height", G_TYPE_INT, video_info->bmiHeader.biHeight,
+            "framerate", GST_TYPE_FRACTION,
+            (int) (10000000 / video_info->AvgTimePerFrame), 1, "format",
+            GST_TYPE_FOURCC, MAKEFOURCC ('I', '4', '2', '0'), NULL);
+
+        if (mediacaps) {
+          src->pins_mediatypes =
+              g_list_append (src->pins_mediatypes, pin_mediatype);
+          gst_caps_append (caps, mediacaps);
+        } else {
+          gst_dshow_free_pin_mediatype (pin_mediatype);
+        }
+        continue;
+      }
+
+      /* RGB24 */
+      if ((UuidCompare (&pin_mediatype->mediatype->subtype, (UUID *) &MEDIASUBTYPE_RGB24,
+                  &rpcstatus) == 0 && rpcstatus == RPC_S_OK)
+          && (UuidCompare (&pin_mediatype->mediatype->formattype,
+                  (UUID *) &FORMAT_VideoInfo, &rpcstatus) == 0
+              && rpcstatus == RPC_S_OK)) {
+        video_info = (VIDEOINFOHEADER *) pin_mediatype->mediatype->pbFormat;
+
+        /* ffmpegcolorspace handles RGB24 in BIG_ENDIAN */
+        mediacaps = gst_caps_new_simple ("video/x-raw-rgb",
+            "bpp", G_TYPE_INT, 24,
+            "depth", G_TYPE_INT, 24,
+            "width", G_TYPE_INT, video_info->bmiHeader.biWidth,
+            "height", G_TYPE_INT, video_info->bmiHeader.biHeight,
+            "framerate", GST_TYPE_FRACTION,
+            (int) (10000000 / video_info->AvgTimePerFrame), 1, "endianness",
+            G_TYPE_INT, G_BIG_ENDIAN, "red_mask", G_TYPE_INT, 255, "green_mask",
+            G_TYPE_INT, 65280, "blue_mask", G_TYPE_INT, 16711680, NULL);
+
+        if (mediacaps) {
+          src->pins_mediatypes =
+              g_list_append (src->pins_mediatypes, pin_mediatype);
+          gst_caps_append (caps, mediacaps);
+        } else {
+          gst_dshow_free_pin_mediatype (pin_mediatype);
+        }
+        continue;
+      }
+
+      /* DVSD */
+      if ((UuidCompare (&pin_mediatype->mediatype->subtype, (UUID *) &MEDIASUBTYPE_dvsd,
+                  &rpcstatus) == 0 && rpcstatus == RPC_S_OK)
+          && (UuidCompare (&pin_mediatype->mediatype->formattype,
+                  (UUID *) &FORMAT_VideoInfo, &rpcstatus) == 0
+              && rpcstatus == RPC_S_OK)) {
+        video_info = (VIDEOINFOHEADER *) pin_mediatype->mediatype->pbFormat;
+
+        mediacaps = gst_caps_new_simple ("video/x-dv",
+            "systemstream", G_TYPE_BOOLEAN, FALSE,
+            "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('d', 'v', 's', 'd'),
+            "framerate", GST_TYPE_FRACTION,
+            (int) (10000000 / video_info->AvgTimePerFrame), 1, "width",
+            G_TYPE_INT, video_info->bmiHeader.biWidth, "height", G_TYPE_INT,
+            video_info->bmiHeader.biHeight, NULL);
+
+        if (mediacaps) {
+          src->pins_mediatypes =
+              g_list_append (src->pins_mediatypes, pin_mediatype);
+          gst_caps_append (caps, mediacaps);
+        } else {
+          gst_dshow_free_pin_mediatype (pin_mediatype);
+        }
+        continue;
+      }
+
+      /* DV stream */
+      if ((UuidCompare (&pin_mediatype->mediatype->subtype, (UUID *) &MEDIASUBTYPE_dvsd,
+                  &rpcstatus) == 0 && rpcstatus == RPC_S_OK)
+          && (UuidCompare (&pin_mediatype->mediatype->formattype,
+                  (UUID *) &FORMAT_DvInfo, &rpcstatus) == 0 && rpcstatus == RPC_S_OK)) {
+
+        mediacaps = gst_caps_new_simple ("video/x-dv",
+            "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
+
+        if (mediacaps) {
+          src->pins_mediatypes =
+              g_list_append (src->pins_mediatypes, pin_mediatype);
+          gst_caps_append (caps, mediacaps);
+        } else {
+          gst_dshow_free_pin_mediatype (pin_mediatype);
+        }
+        continue;
+      }
+    } else {
+      gst_dshow_free_pin_mediatype (pin_mediatype);
+    }
+  }
+
+  if (caps && gst_caps_is_empty (caps)) {
+    gst_caps_unref (caps);
+    caps = NULL;
+  }
+
+  return caps;
+}
+
+static gboolean
+gst_dshowvideosrc_push_buffer (byte * buffer, long size, byte * src_object,
+    UINT64 start, UINT64 stop)
+{
+  GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (src_object);
+  GstBuffer *buf;
+  IPin *pPin = NULL;
+  HRESULT hres = S_FALSE;
+  AM_MEDIA_TYPE *pMediaType = NULL;
+
+  if (!buffer || size == 0 || !src) {
+    return FALSE;
+  }
+
+  /* create a new buffer assign to it the clock time as timestamp */
+  buf = gst_buffer_new_and_alloc (size);
+
+  GST_BUFFER_SIZE (buf) = size;
+  GST_BUFFER_TIMESTAMP (buf) = gst_clock_get_time (GST_ELEMENT (src)->clock);
+  GST_BUFFER_TIMESTAMP (buf) -= GST_ELEMENT (src)->base_time;
+  GST_BUFFER_DURATION (buf) = stop - start;
+
+  if (src->is_rgb) {
+    /* FOR RGB directshow decoder will return bottom-up BITMAP 
+     * There is probably a way to get top-bottom video frames from
+     * the decoder...
+     */
+    gint line = 0;
+    gint stride = size / src->height;
+
+    for (; line < src->height; line++) {
+      memcpy (GST_BUFFER_DATA (buf) + (line * stride),
+          buffer + (size - ((line + 1) * (stride))), stride);
+    }
+  } else {
+    memcpy (GST_BUFFER_DATA (buf), buffer, size);
+  }
+
+  GST_CAT_DEBUG (dshowvideosrc_debug,
+      "push_buffer => pts %" GST_TIME_FORMAT "duration %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (stop - start));
+
+  /* the negotiate() method already set caps on the source pad */
+  gst_buffer_set_caps (buf, GST_PAD_CAPS (GST_BASE_SRC_PAD (src)));
+
+  g_mutex_lock (src->buffer_mutex);
+  if (src->buffer != NULL)
+    gst_buffer_unref (src->buffer);
+  src->buffer = buf;
+  g_cond_signal (src->buffer_cond);
+  g_mutex_unlock (src->buffer_mutex);
+
+  return TRUE;
+}