static GstCaps *
gst_dshowvideosrc_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
/* If there is no desired video size, set default video size to device preffered video size */
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
GstStructure *structure = gst_caps_get_structure (caps, 0);
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) {
GList *type_pin_mediatype = g_list_nth (src->pins_mediatypes, res);
if (type_pin_mediatype) {
GstCapturePinMediaType *pin_mediatype =
(GstCapturePinMediaType *) type_pin_mediatype->data;
gst_structure_fixate_field_nearest_int (structure, "width",
pin_mediatype->defaultWidth);
gst_structure_fixate_field_nearest_int (structure, "height",
pin_mediatype->defaultHeight);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
pin_mediatype->defaultFPS, 1);
}
}
return GST_BASE_SRC_CLASS (gst_dshowvideosrc_parent_class)->fixate (bsrc, caps);
}
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 GstStateChangeReturn
gst_dshowvideosrc_change_state (GstElement * element, GstStateChange transition)
{
HRESULT hres = S_FALSE;
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_ERROR ("Can't RUN the directshow capture graph (error=0x%x)", hres);
// return GST_STATE_CHANGE_FAILURE;
//}
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
if (src->media_control)
hres = src->media_control->Stop ();
if (hres != S_OK) {
GST_ERROR ("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 (gst_dshowvideosrc_parent_class)->change_state (element, transition);
}
static GstCaps *
gst_dshowvideosrc_get_caps (GstBaseSrc * basesrc, GstCaps * filter)
{
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (basesrc);
GstCaps *caps;
if (src->caps) {
caps = gst_caps_ref (src->caps);
} else {
caps = gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (src));
}
if (caps) {
GstCaps *filtcaps;
if (filter) {
filtcaps = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
} else {
filtcaps = gst_caps_ref (caps);
}
gst_caps_unref (caps);
return filtcaps;
}
return NULL;
}
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_FLUSHING;
}
GST_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 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_ERROR
("Can't create an instance of the dshow graph manager (error=0x%x)",
hres);
goto error;
}
hres = src->filter_graph->QueryInterface (IID_IMediaFilter,
(LPVOID *) & src->media_filter);
if (hres != S_OK || !src->media_filter) {
GST_ERROR
("Can't get IMediacontrol interface from the graph manager (error=0x%x)",
hres);
goto error;
}
src->dshow_fakesink = new CDshowFakeSink;
src->dshow_fakesink->AddRef ();
hres = src->filter_graph->AddFilter (src->video_cap_filter, L"capture");
if (hres != S_OK) {
GST_ERROR ("Can't add video capture filter to the graph (error=0x%x)",
hres);
goto error;
}
hres = src->filter_graph->AddFilter (src->dshow_fakesink, L"sink");
if (hres != S_OK) {
GST_ERROR ("Can't add our fakesink filter to the graph (error=0x%x)", 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_push_buffer (guint8 * buffer, guint size, gpointer src_object,
GstClockTime duration)
{
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (src_object);
GstBuffer *buf = NULL;
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;
GstClock *clock = gst_element_get_clock (GST_ELEMENT (src));
GST_BUFFER_TIMESTAMP (buf) =
GST_CLOCK_DIFF (gst_element_get_base_time (GST_ELEMENT (src)), gst_clock_get_time (clock));
gst_object_unref (clock);
GST_BUFFER_DURATION (buf) = duration;
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_DEBUG ("push_buffer => pts %" GST_TIME_FORMAT "duration %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (duration));
/* 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;
}
static gboolean
gst_dshowvideosrc_unlock_stop (GstBaseSrc * bsrc)
{
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
src->stop_requested = FALSE;
return TRUE;
}
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;
/* reset caps */
if (src->caps) {
gst_caps_unref (src->caps);
src->caps = NULL;
}
/* reset device id */
if (src->device) {
g_free (src->device);
src->device = 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 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 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_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (object);
switch(prop_id) {
case PROP_DEVICE:
g_value_set_string(value, src->device);
break;
case PROP_DEVICE_NAME:
g_value_set_string(value, src->device_name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_dshowvideosrc_change_state (GstElement * element, GstStateChange transition)
{
HRESULT hres = S_FALSE;
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) {
/* Setting this to TRUE because set_caps may be invoked before
Run() returns. */
src->is_running = TRUE;
hres = src->media_filter->Run (0);
}
if (hres != S_OK) {
GST_ERROR ("Can't RUN the directshow capture graph (error=0x%x)", hres);
src->is_running = FALSE;
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_ERROR ("Can't STOP the directshow capture graph (error=%d)", hres);
return GST_STATE_CHANGE_FAILURE;
}
src->is_running = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
}
return GST_ELEMENT_CLASS(gst_dshowvideosrc_parent_class)->change_state(element, transition);
}
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:
{
const gchar *device = g_value_get_string (value);
g_free (src->device);
src->device = NULL;
if (device && strlen (device) != 0) {
src->device = g_value_dup_string (value);
}
break;
}
case PROP_DEVICE_NAME:
{
const gchar *device_name = g_value_get_string (value);
g_free (src->device_name);
src->device_name = NULL;
if (device_name && strlen (device_name) != 0) {
src->device_name = g_value_dup_string (value);
}
break;
}
case PROP_DEVICE_INDEX:
{
src->device_index = g_value_get_int (value);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_dshowvideosrc_push_buffer (guint8 * buffer, guint size, gpointer src_object,
GstClockTime duration)
{
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (src_object);
GstBuffer *buf = NULL;
GstMapInfo map;
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_set_size(buf, size);
GstClock *clock = gst_element_get_clock (GST_ELEMENT (src));
GST_BUFFER_PTS (buf) =
GST_CLOCK_DIFF (gst_element_get_base_time (GST_ELEMENT (src)), gst_clock_get_time (clock));
//GST_BUFFER_DTS(buf) = GST_BUFFER_PTS (buf);
GST_BUFFER_DTS(buf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_OFFSET(buf) = src->offset++;
GST_BUFFER_OFFSET_END(buf) = src->offset;
GST_BUFFER_FLAG_SET(buf, GST_BUFFER_FLAG_LIVE);
gst_object_unref (clock);
GST_BUFFER_DURATION (buf) = duration;
gst_buffer_map(buf, &map, GST_MAP_WRITE);
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 (map.data + (line * stride),
buffer + (size - ((line + 1) * (stride))), stride);
}
} else {
memcpy (map.data, buffer, size);
}
gst_buffer_unmap(buf, &map);
src->time += duration;
gst_object_sync_values (GST_OBJECT (src), src->time);
GST_DEBUG ("push_buffer => pts %" GST_TIME_FORMAT "duration %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (duration));
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;
}
static gboolean
gst_dshowvideosrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
HRESULT hres;
IPin *input_pin = NULL;
IPin *output_pin = NULL;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
GstStructure *s = gst_caps_get_structure (caps, 0);
OAFilterState ds_graph_state;
GstCaps *current_caps;
/* 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;
hres = src->media_control->GetState(0, &ds_graph_state);
if(ds_graph_state == State_Running) {
GST_INFO("Setting caps while DirectShow graph is already running");
current_caps = gst_pad_get_current_caps(GST_BASE_SRC_PAD(src));
if(gst_caps_is_equal(current_caps, caps)) {
/* no need to set caps, just return */
GST_INFO("Not resetting caps");
gst_caps_unref(current_caps);
return TRUE;
}
else {
/* stop graph and disconnect filters so new caps can be set */
GST_INFO("Different caps, stopping DirectShow graph");
hres = src->media_control->Stop();
hres = src->media_control->GetState(2000, &ds_graph_state);
if(hres != S_OK) {
GST_ERROR("Could not stop DirectShow graph. Cannot renegoiate pins.");
goto error;
}
gst_dshow_get_pin_from_filter (src->dshow_fakesink, PINDIR_INPUT,
&input_pin);
if (!input_pin) {
input_pin->Release();
GST_ERROR ("Can't get input pin from our dshow fakesink");
goto error;
}
input_pin->ConnectedTo(&output_pin);
hres = input_pin->Disconnect();
hres = output_pin->Disconnect();
input_pin->Release();
output_pin->Release();
}
gst_caps_unref(current_caps);
}
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 */
GList *type_pin_mediatype = g_list_nth (src->pins_mediatypes, res);
if (type_pin_mediatype) {
GstCapturePinMediaType *pin_mediatype =
(GstCapturePinMediaType *) type_pin_mediatype->data;
gchar *src_caps_string = NULL;
const gchar *format_string = NULL;
/* retrieve the desired video size */
VIDEOINFOHEADER *video_info = NULL;
gint width = 0;
gint height = 0;
gint numerator = 0;
gint denominator = 0;
gst_structure_get_int (s, "width", &width);
gst_structure_get_int (s, "height", &height);
gst_structure_get_fraction (s, "framerate", &numerator, &denominator);
/* check if the desired video size is valid about granularity */
/* This check will be removed when GST_TYPE_INT_RANGE_STEP exits */
/* See remarks in gst_dshow_new_video_caps function */
if (pin_mediatype->granularityWidth != 0
&& width % pin_mediatype->granularityWidth != 0)
g_warning ("your desired video size is not valid : %d mod %d !=0\n",
width, pin_mediatype->granularityWidth);
if (pin_mediatype->granularityHeight != 0
&& height % pin_mediatype->granularityHeight != 0)
g_warning ("your desired video size is not valid : %d mod %d !=0\n",
height, pin_mediatype->granularityHeight);
/* update mediatype */
video_info = (VIDEOINFOHEADER *) pin_mediatype->mediatype->pbFormat;
video_info->bmiHeader.biWidth = width;
video_info->bmiHeader.biHeight = height;
video_info->AvgTimePerFrame =
(LONGLONG) (10000000 * denominator / (double) numerator);
video_info->bmiHeader.biSizeImage = DIBSIZE (video_info->bmiHeader);
pin_mediatype->mediatype->lSampleSize = DIBSIZE (video_info->bmiHeader);
src->dshow_fakesink->gst_set_media_type (pin_mediatype->mediatype);
src->dshow_fakesink->gst_set_buffer_callback (
(push_buffer_func) gst_dshowvideosrc_push_buffer, src);
gst_dshow_get_pin_from_filter (src->dshow_fakesink, PINDIR_INPUT,
&input_pin);
if (!input_pin) {
GST_ERROR ("Can't get input pin from our dshow fakesink");
goto error;
}
hres = src->filter_graph->ConnectDirect (pin_mediatype->capture_pin,
input_pin, pin_mediatype->mediatype);
input_pin->Release ();
if (hres != S_OK) {
GST_ERROR
("Can't connect capture filter with fakesink filter (error=0x%x)",
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;
format_string = gst_structure_get_string (s, "format");
if(format_string) {
if(!strcmp(format_string, "BGR")) {
src->is_rgb = TRUE;
}
else {
src->is_rgb = FALSE;
}
}
hres = src->media_control->Run();
hres = src->media_control->GetState(5000, &ds_graph_state);
if(hres != S_OK || ds_graph_state != State_Running) {
GST_ERROR("Could not run graph");
goto error;
}
}
}
}
return TRUE;
error:
return FALSE;
}
static gboolean
gst_dshowvideosrc_start (GstBaseSrc * bsrc)
{
HRESULT hres = S_FALSE;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
src->offset = 0;
src->time = 0;
gst_object_sync_values (GST_OBJECT (src), src->time);
/*
The filter graph now is created via the IGraphBuilder Interface
Code added to build upstream filters, needed for USB Analog TV Tuners / DVD Maker, based on AMCap code.
by Fabrice Costa <*****@*****.**>
*/
hres = CoCreateInstance(CLSID_FilterGraph, NULL,
CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (LPVOID *) & src->graph_builder );
if (hres != S_OK || !src->graph_builder ) {
GST_ERROR
("Can't create an instance of the dshow graph builder (error=0x%x)",
hres);
goto error;
} else {
/*graph builder is derived from IFilterGraph so we can assign it to the old src->filter_graph*/
src->filter_graph = (IFilterGraph*) src->graph_builder;
}
/*adding capture graph builder to correctly create upstream filters, Analog TV, TV Tuner */
hres = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2,
(LPVOID *) & src->capture_builder);
if ( hres != S_OK || !src->capture_builder ) {
GST_ERROR
("Can't create an instance of the dshow capture graph builder manager (error=0x%x)",
hres);
goto error;
} else {
src->capture_builder->SetFiltergraph(src->graph_builder);
}
hres = src->filter_graph->QueryInterface (IID_IMediaControl,
(LPVOID *) & src->media_control);
if (hres != S_OK || !src->media_control) {
GST_ERROR
("Can't get IMediacontrol interface from the graph manager (error=0x%x)",
hres);
goto error;
}
src->dshow_fakesink = new CDshowFakeSink;
src->dshow_fakesink->AddRef ();
hres = src->filter_graph->AddFilter (src->video_cap_filter, L"capture");
if (hres != S_OK) {
GST_ERROR ("Can't add video capture filter to the graph (error=0x%x)",
hres);
goto error;
}
/* Finding interfaces really creates the upstream filters */
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, src->video_cap_filter,
IID_IAMVideoCompression, (LPVOID *)&src->pVC);
if(hres != S_OK)
{
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, src->video_cap_filter,
IID_IAMVideoCompression, (LPVOID *)&src->pVC);
}
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved,
src->video_cap_filter, IID_IAMStreamConfig, (LPVOID *)&src->pVSC);
if(hres != S_OK)
{
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, src->video_cap_filter,
IID_IAMStreamConfig, (LPVOID *)&src->pVSC);
if (hres != S_OK) {
// this means we can't set frame rate (non-DV only)
GST_ERROR ("Error %x: Cannot find VCapture:IAMStreamConfig", hres);
goto error;
}
}
hres = src->filter_graph->AddFilter (src->dshow_fakesink, L"sink");
if (hres != S_OK) {
GST_ERROR ("Can't add our fakesink filter to the graph (error=0x%x)", hres);
goto error;
}
return TRUE;
error:
if (src->dshow_fakesink) {
src->dshow_fakesink->Release ();
src->dshow_fakesink = NULL;
}
if (src->media_control) {
src->media_control->Release ();
src->media_control = NULL;
}
if (src->graph_builder) {
src->graph_builder->Release ();
src->graph_builder = NULL;
}
if (src->capture_builder) {
src->capture_builder->Release ();
src->capture_builder = NULL;
}
if (src->pVC) {
src->pVC->Release ();
src->pVC = NULL;
}
if (src->pVSC) {
src->pVSC->Release ();
src->pVSC = NULL;
}
return FALSE;
}
static GstCaps *
gst_dshowvideosrc_get_caps (GstBaseSrc * basesrc, GstCaps *filter)
{
HRESULT hres = S_OK;
IBindCtx *lpbc = NULL;
IMoniker *videom;
DWORD dwEaten;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (basesrc);
gunichar2 *unidevice = NULL;
if (src->caps) {
return gst_caps_ref (src->caps);
}
if (!src->device) {
src->device =
gst_dshow_getdevice_from_devicename (&CLSID_VideoInputDeviceCategory,
&src->device_name);
if (!src->device) {
GST_ERROR ("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) {
{
GstCaps *caps =
gst_dshowvideosrc_getcaps_from_streamcaps (src, capture_pin);
if (caps) {
gst_caps_append (src->caps, caps);
} else {
caps = gst_dshowvideosrc_getcaps_from_enum_mediatypes (src, capture_pin);
if (caps)
gst_caps_append (src->caps, caps);
}
}
}
pKs->Release ();
}
capture_pin->Release ();
}
enumpins->Release ();
}
}
if (unidevice) {
g_free (unidevice);
}
if (src->caps) {
if (filter) {
return gst_caps_intersect_full (filter, src->caps,
GST_CAPS_INTERSECT_FIRST);
} else {
return gst_caps_ref (src->caps);
}
}
return NULL;
}
static gboolean
gst_dshowvideosrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
HRESULT hres;
IPin *input_pin = NULL;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
GstStructure *s = gst_caps_get_structure (caps, 0);
GstCaps *current_caps = gst_pad_get_current_caps (GST_BASE_SRC_PAD (bsrc));
if (current_caps) {
if (gst_caps_is_equal (caps, current_caps)) {
gst_caps_unref (current_caps);
return TRUE;
}
gst_caps_unref (current_caps);
}
/* Same remark as in gstdshowaudiosrc. */
gboolean was_running = src->is_running;
if (was_running) {
HRESULT hres = src->media_filter->Stop ();
if (hres != S_OK) {
GST_ERROR ("Can't STOP the directshow capture graph (error=0x%x)", hres);
return FALSE;
}
src->is_running = FALSE;
}
/* 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 */
GList *type_pin_mediatype = g_list_nth (src->pins_mediatypes, res);
if (type_pin_mediatype) {
GstCapturePinMediaType *pin_mediatype =
(GstCapturePinMediaType *) type_pin_mediatype->data;
gchar *caps_string = NULL;
gchar *src_caps_string = NULL;
/* retrieve the desired video size */
VIDEOINFOHEADER *video_info = NULL;
gint width = 0;
gint height = 0;
gint numerator = 0;
gint denominator = 0;
gst_structure_get_int (s, "width", &width);
gst_structure_get_int (s, "height", &height);
gst_structure_get_fraction (s, "framerate", &numerator, &denominator);
/* check if the desired video size is valid about granularity */
/* This check will be removed when GST_TYPE_INT_RANGE_STEP exits */
/* See remarks in gst_dshow_new_video_caps function */
if (pin_mediatype->granularityWidth != 0
&& width % pin_mediatype->granularityWidth != 0)
g_warning ("your desired video size is not valid : %d mod %d !=0\n",
width, pin_mediatype->granularityWidth);
if (pin_mediatype->granularityHeight != 0
&& height % pin_mediatype->granularityHeight != 0)
g_warning ("your desired video size is not valid : %d mod %d !=0\n",
height, pin_mediatype->granularityHeight);
/* update mediatype */
video_info = (VIDEOINFOHEADER *) pin_mediatype->mediatype->pbFormat;
video_info->bmiHeader.biWidth = width;
video_info->bmiHeader.biHeight = height;
video_info->AvgTimePerFrame =
(LONGLONG) (10000000 * denominator / (double) numerator);
video_info->bmiHeader.biSizeImage = DIBSIZE (video_info->bmiHeader);
pin_mediatype->mediatype->lSampleSize = DIBSIZE (video_info->bmiHeader);
src->dshow_fakesink->gst_set_media_type (pin_mediatype->mediatype);
src->dshow_fakesink->gst_set_buffer_callback (
(push_buffer_func) gst_dshowvideosrc_push_buffer, src);
gst_dshow_get_pin_from_filter (src->dshow_fakesink, PINDIR_INPUT,
&input_pin);
if (!input_pin) {
GST_ERROR ("Can't get input pin from our dshow fakesink");
goto error;
}
if (gst_dshow_is_pin_connected (pin_mediatype->capture_pin)) {
GST_DEBUG_OBJECT (src,
"capture_pin already connected, disconnecting");
src->filter_graph->Disconnect (pin_mediatype->capture_pin);
}
if (gst_dshow_is_pin_connected (input_pin)) {
GST_DEBUG_OBJECT (src, "input_pin already connected, disconnecting");
src->filter_graph->Disconnect (input_pin);
}
hres = src->filter_graph->ConnectDirect (pin_mediatype->capture_pin,
input_pin, pin_mediatype->mediatype);
input_pin->Release ();
if (hres != S_OK) {
GST_ERROR
("Can't connect capture filter with fakesink filter (error=0x%x)",
hres);
goto error;
}
/* save width and height negociated */
gst_structure_get_int (s, "width", &src->width);
gst_structure_get_int (s, "height", &src->height);
GstVideoInfo info;
gst_video_info_from_caps(&info, caps);
switch (GST_VIDEO_INFO_FORMAT(&info)) {
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
src->is_rgb = TRUE;
break;
default:
src->is_rgb = FALSE;
break;
}
}
}
}
if (was_running) {
HRESULT hres = src->media_filter->Run (0);
if (hres != S_OK) {
GST_ERROR ("Can't RUN the directshow capture graph (error=0x%x)", hres);
return FALSE;
}
src->is_running = TRUE;
}
return TRUE;
error:
return FALSE;
}
static gboolean
gst_dshowvideosrc_start (GstBaseSrc * bsrc)
{
HRESULT hres = S_FALSE;
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
DshowDeviceEntry *device_entry;
IMoniker *moniker = NULL;
device_entry = gst_dshow_select_device (&CLSID_VideoInputDeviceCategory,
src->device, src->device_name, src->device_index);
if (device_entry == NULL) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Failed to find device"), (NULL));
return FALSE;
}
g_free (src->device);
g_free (src->device_name);
src->device = g_strdup (device_entry->device);
src->device_name = g_strdup (device_entry->device_name);
src->device_index = device_entry->device_index;
moniker = device_entry->moniker;
device_entry->moniker = NULL;
gst_dshow_device_entry_free (device_entry);
src->video_cap_filter = gst_dshow_create_capture_filter (moniker);
moniker->Release ();
if (src->video_cap_filter == NULL) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
("Failed to create capture filter for device"), (NULL));
return FALSE;
}
src->caps = gst_dshowvideosrc_getcaps_from_capture_filter (
src->video_cap_filter, (GList**)&src->pins_mediatypes);
if (gst_caps_is_empty (src->caps)) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
("Failed to get any caps from devce"), (NULL));
return FALSE;
}
/*
The filter graph now is created via the IGraphBuilder Interface
Code added to build upstream filters, needed for USB Analog TV Tuners / DVD Maker, based on AMCap code.
by Fabrice Costa <*****@*****.**>
*/
hres = CoCreateInstance(CLSID_FilterGraph, NULL,
CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (LPVOID *) & src->graph_builder );
if (hres != S_OK || !src->graph_builder ) {
GST_ERROR
("Can't create an instance of the dshow graph builder (error=0x%x)",
hres);
goto error;
} else {
/*graph builder is derived from IFilterGraph so we can assign it to the old src->filter_graph*/
src->filter_graph = (IFilterGraph*) src->graph_builder;
}
/*adding capture graph builder to correctly create upstream filters, Analog TV, TV Tuner */
hres = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2,
(LPVOID *) & src->capture_builder);
if ( hres != S_OK || !src->capture_builder ) {
GST_ERROR
("Can't create an instance of the dshow capture graph builder manager (error=0x%x)",
hres);
goto error;
} else {
src->capture_builder->SetFiltergraph(src->graph_builder);
}
hres = src->filter_graph->QueryInterface (IID_IMediaFilter,
(LPVOID *) & src->media_filter);
if (hres != S_OK || !src->media_filter) {
GST_ERROR
("Can't get IMediacontrol interface from the graph manager (error=0x%x)",
hres);
goto error;
}
src->dshow_fakesink = new CDshowFakeSink;
src->dshow_fakesink->AddRef ();
hres = src->filter_graph->AddFilter (src->video_cap_filter, L"capture");
if (hres != S_OK) {
GST_ERROR ("Can't add video capture filter to the graph (error=0x%x)",
hres);
goto error;
}
/* Finding interfaces really creates the upstream filters */
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved, src->video_cap_filter,
IID_IAMVideoCompression, (LPVOID *)&src->pVC);
if(hres != S_OK)
{
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, src->video_cap_filter,
IID_IAMVideoCompression, (LPVOID *)&src->pVC);
}
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Interleaved,
src->video_cap_filter, IID_IAMStreamConfig, (LPVOID *)&src->pVSC);
if(hres != S_OK)
{
hres = src->capture_builder->FindInterface(&PIN_CATEGORY_CAPTURE,
&MEDIATYPE_Video, src->video_cap_filter,
IID_IAMStreamConfig, (LPVOID *)&src->pVSC);
if (hres != S_OK) {
/* this means we can't set frame rate (non-DV only) */
GST_ERROR ("Error %x: Cannot find VCapture:IAMStreamConfig", hres);
goto error;
}
}
hres = src->filter_graph->AddFilter (src->dshow_fakesink, L"sink");
if (hres != S_OK) {
GST_ERROR ("Can't add our fakesink filter to the graph (error=0x%x)", hres);
goto error;
}
return TRUE;
error:
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
("Failed to build filter graph"), (NULL));
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->graph_builder) {
src->graph_builder->Release ();
src->graph_builder = NULL;
}
if (src->capture_builder) {
src->capture_builder->Release ();
src->capture_builder = NULL;
}
if (src->pVC) {
src->pVC->Release ();
src->pVC = NULL;
}
if (src->pVSC) {
src->pVSC->Release ();
src->pVSC = NULL;
}
return FALSE;
}
