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gstreamer/sys/dshowsrcwrapper/gstdshowvideosrc.cpp

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/* GStreamer
* Copyright (C) 2007 Sebastien Moutte <sebastien@moutte.net>
* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
*
* 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"
#include <gst/video/video.h>
GST_DEBUG_CATEGORY_STATIC (dshowvideosrc_debug);
#define GST_CAT_DEFAULT dshowvideosrc_debug
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR ";"
GST_VIDEO_CAPS_YUV ("{ I420 }") ";"
GST_VIDEO_CAPS_YUV ("{ YUY2 }") ";"
"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")
);
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 void gst_dshowvideosrc_src_fixate (GstBaseSrc * bsrc, GstCaps * caps);
static GstFlowReturn gst_dshowvideosrc_create (GstPushSrc * psrc,
GstBuffer ** buf);
/*utils*/
static GstCaps *gst_dshowvideosrc_getcaps_from_streamcaps (GstDshowVideoSrc *
src, IPin * pin);
static GstCaps *gst_dshowvideosrc_getcaps_from_enum_mediatypes (GstDshowVideoSrc *
src, IPin * pin);
static gboolean gst_dshowvideosrc_push_buffer (guint8 * buffer, guint size,
gpointer src_object, GstClockTime duration);
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_metadata (element_class,
"DirectShow video capture source", "Source/Video",
"Receive data from a directshow video capture graph",
"Sebastien Moutte <sebastien@moutte.net>");
}
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->fixate = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_src_fixate);
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_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);
}
}
}
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:
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);
ICreateDevEnum *devices_enum = NULL;
IEnumMoniker *moniker_enum = NULL;
IMoniker *moniker = NULL;
HRESULT hres = S_FALSE;
ULONG fetched;
hres = CoCreateInstance (CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
IID_ICreateDevEnum, (LPVOID *) & devices_enum);
if (hres != S_OK) {
GST_ERROR ("Can't create system device enumerator (error=0x%x)", hres);
array = NULL;
goto clean;
}
hres = devices_enum->CreateClassEnumerator (CLSID_VideoInputDeviceCategory,
&moniker_enum, 0);
if (hres != S_OK || !moniker_enum) {
GST_ERROR ("Can't get enumeration of video devices (error=0x%x)", 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);
GValue value = { 0 };
g_value_init (&value, G_TYPE_STRING);
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->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) {
return gst_caps_ref (src->caps);
}
return NULL;
}
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_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;
}
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_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_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);
/* 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;
}
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;
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:
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;
/* 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 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_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 GstCaps *
gst_dshowvideosrc_getcaps_from_streamcaps (GstDshowVideoSrc * src, IPin * pin)
{
GstCaps *caps = NULL;
HRESULT hres = S_OK;
int icount = 0;
int isize = 0;
VIDEO_STREAM_CONFIG_CAPS vscc;
int i = 0;
IAMStreamConfig *streamcaps = NULL;
hres = pin->QueryInterface (IID_IAMStreamConfig, (LPVOID *) & streamcaps);
if (FAILED (hres)) {
GST_ERROR ("Failed to retrieve IAMStreamConfig (error=0x%x)", hres);
return NULL;
}
streamcaps->GetNumberOfCapabilities (&icount, &isize);
if (isize != sizeof (vscc)) {
streamcaps->Release ();
return NULL;
}
caps = gst_caps_new_empty ();
for (i = 0; i < icount; i++) {
GstCapturePinMediaType *pin_mediatype =
gst_dshow_new_pin_mediatype_from_streamcaps (pin, i, streamcaps);
if (pin_mediatype) {
GstCaps *mediacaps = NULL;
GstVideoFormat video_format =
gst_dshow_guid_to_gst_video_format (pin_mediatype->mediatype);
if (video_format != GST_VIDEO_FORMAT_UNKNOWN) {
mediacaps = gst_dshow_new_video_caps (video_format, NULL,
pin_mediatype);
} else if (gst_dshow_check_mediatype (pin_mediatype->mediatype,
MEDIASUBTYPE_dvsd, FORMAT_VideoInfo)) {
mediacaps =
gst_dshow_new_video_caps (GST_VIDEO_FORMAT_UNKNOWN,
"video/x-dv, systemstream=FALSE", pin_mediatype);
} else if (gst_dshow_check_mediatype (pin_mediatype->mediatype,
MEDIASUBTYPE_dvsd, FORMAT_DvInfo)) {
mediacaps =
gst_dshow_new_video_caps (GST_VIDEO_FORMAT_UNKNOWN,
"video/x-dv, systemstream=TRUE", pin_mediatype);
pin_mediatype->granularityWidth = 0;
pin_mediatype->granularityHeight = 0;
}
if (mediacaps) {
src->pins_mediatypes =
g_list_append (src->pins_mediatypes, pin_mediatype);
gst_caps_append (caps, mediacaps);
} else {
/* failed to convert dshow caps */
gst_dshow_free_pin_mediatype (pin_mediatype);
}
}
}
streamcaps->Release ();
if (caps && gst_caps_is_empty (caps)) {
gst_caps_unref (caps);
caps = NULL;
}
return caps;
}
static GstCaps *
gst_dshowvideosrc_getcaps_from_enum_mediatypes (GstDshowVideoSrc * src, IPin * pin)
{
GstCaps *caps = NULL;
IEnumMediaTypes *enum_mediatypes = NULL;
HRESULT hres = S_OK;
GstCapturePinMediaType *pin_mediatype = NULL;
hres = pin->EnumMediaTypes (&enum_mediatypes);
if (FAILED (hres)) {
GST_ERROR ("Failed to retrieve IEnumMediaTypes (error=0x%x)", hres);
return NULL;
}
caps = gst_caps_new_empty ();
while ((pin_mediatype = gst_dshow_new_pin_mediatype_from_enum_mediatypes (pin, enum_mediatypes)) != NULL) {
GstCaps *mediacaps = NULL;
GstVideoFormat video_format = gst_dshow_guid_to_gst_video_format (pin_mediatype->mediatype);
if (video_format != GST_VIDEO_FORMAT_UNKNOWN)
mediacaps = gst_video_format_new_caps (video_format,
pin_mediatype->defaultWidth, pin_mediatype->defaultHeight,
pin_mediatype->defaultFPS, 1, 1, 1);
if (mediacaps) {
src->pins_mediatypes =
g_list_append (src->pins_mediatypes, pin_mediatype);
gst_caps_append (caps, mediacaps);
} else {
/* failed to convert dshow caps */
gst_dshow_free_pin_mediatype (pin_mediatype);
}
}
enum_mediatypes->Release ();
if (caps && gst_caps_is_empty (caps)) {
gst_caps_unref (caps);
caps = NULL;
}
return caps;
}
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;
}
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