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gstreamer/sys/dshowsrcwrapper/gstdshowvideosrc.cpp
Joshua M. Doe 912ff02a21 dshowsrcwrapper: refactor device selection, filter creation, and caps retrieval 
This allows a future GstDeviceProvider to more easily query devices and caps.
2018-11-09 09:52:40 +00:00

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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, 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_MAKE ("{ I420, BGR, YUY2, UYVY, BGRx, BGR16, BGR15, "
"GRAY8 }") "; "
"video/x-dv, "
"format= (string) DVSD, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", "
"framerate = " GST_VIDEO_FPS_RANGE ", "
"systemstream = (boolean) { TRUE, FALSE }; "
"image/jpeg, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", "
"framerate = " GST_VIDEO_FPS_RANGE "; "
"video/x-h264, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", "
"framerate = " GST_VIDEO_FPS_RANGE
)
);
G_DEFINE_TYPE (GstDshowVideoSrc, gst_dshowvideosrc, GST_TYPE_PUSH_SRC)
enum
{
PROP_0,
PROP_DEVICE,
PROP_DEVICE_NAME,
PROP_DEVICE_INDEX
};
#define DEFAULT_PROP_DEVICE_INDEX 0
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 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, GstCaps * filter);
static GstCaps *gst_dshowvideosrc_src_fixate (GstBaseSrc * bsrc, GstCaps * caps);
static GstFlowReturn gst_dshowvideosrc_create (GstPushSrc * psrc,
GstBuffer ** buf);
/*utils*/
GstCaps *gst_dshowvideosrc_getcaps_from_streamcaps (IPin * pin,
GList ** pins_mediatypes);
GstCaps *gst_dshowvideosrc_getcaps_from_enum_mediatypes (IPin * pin,
GList ** pins_mediatypes);
static gboolean gst_dshowvideosrc_push_buffer (guint8 * buffer, guint size,
gpointer src_object, GstClockTime duration);
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->set_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_set_caps);
gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_dshowvideosrc_get_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 video device", NULL,
static_cast < GParamFlags > (G_PARAM_READWRITE)));
g_object_class_install_property
(gobject_class, PROP_DEVICE_INDEX,
g_param_spec_int ("device-index", "Device index",
"Index of the enumerated video device", 0, G_MAXINT,
DEFAULT_PROP_DEVICE_INDEX,
static_cast < GParamFlags > (G_PARAM_READWRITE)));
gst_element_class_add_static_pad_template (gstelement_class, &src_template);
gst_element_class_set_static_metadata (gstelement_class,
"DirectShow video capture source", "Source/Video",
"Receive data from a directshow video capture graph",
"Sebastien Moutte <sebastien@moutte.net>");
GST_DEBUG_CATEGORY_INIT (dshowvideosrc_debug, "dshowvideosrc", 0,
"Directshow video source");
}
static void
gst_dshowvideosrc_init (GstDshowVideoSrc * src)
{
src->device = NULL;
src->device_name = NULL;
src->device_index = DEFAULT_PROP_DEVICE_INDEX;
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->is_running = FALSE;
/*added for analog input*/
src->graph_builder = NULL;
src->capture_builder = NULL;
src->pVC = NULL;
src->pVSC = NULL;
g_cond_init(&src->buffer_cond);
g_mutex_init(&src->buffer_mutex);
src->buffer = NULL;
src->stop_requested = FALSE;
CoInitializeEx (NULL, COINIT_MULTITHREADED);
gst_base_src_set_live (GST_BASE_SRC (src), TRUE);
}
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);
}
}
caps = GST_BASE_SRC_CLASS (gst_dshowvideosrc_parent_class)->fixate(bsrc, caps);
return caps;
}
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;
}
g_cond_clear(&src->buffer_cond);
g_mutex_clear(&src->buffer_mutex);
CoUninitialize ();
G_OBJECT_CLASS (gst_dshowvideosrc_parent_class)->dispose (gobject);
}
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 void
gst_dshowvideosrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDshowVideoSrc *src;
g_return_if_fail (GST_IS_DSHOWVIDEOSRC (object));
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;
case PROP_DEVICE_INDEX:
g_value_set_int (value, src->device_index);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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;
}
GstCaps *
gst_dshowvideosrc_getcaps_from_capture_filter (IBaseFilter * filter,
GList ** pins_mediatypes)
{
IPin *capture_pin = NULL;
IEnumPins *enumpins = NULL;
HRESULT hres;
GstCaps *caps;
g_assert (filter);
caps = gst_caps_new_empty ();
/* get the capture pins supported types */
hres = 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 *caps2;
caps2 = gst_dshowvideosrc_getcaps_from_streamcaps (capture_pin,
pins_mediatypes);
if (caps2) {
gst_caps_append (caps, caps2);
} else {
caps2 = gst_dshowvideosrc_getcaps_from_enum_mediatypes (
capture_pin, pins_mediatypes);
if (caps2) {
gst_caps_append (caps, caps2);
}
}
}
pKs->Release ();
}
capture_pin->Release ();
}
enumpins->Release ();
}
GST_DEBUG ("Device supports these caps: %" GST_PTR_FORMAT, caps);
return caps;
}
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 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 <fabricio.costa@moldeointeractive.com.ar>
*/
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;
}
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;
GST_DEBUG_OBJECT (src, "Default: %dx%d@%d", pin_mediatype->defaultWidth, pin_mediatype->defaultHeight, pin_mediatype->defaultFPS);
/* 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->pVSC->SetFormat(pin_mediatype->mediatype);
if (FAILED (hres)) {
GST_ERROR ("Failed to set capture pin format (error=0x%x)", hres);
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);
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_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 any upstream filter */
if (src->pVC) {
src->pVC->Release ();
src->pVC = NULL;
}
if (src->pVSC) {
src->pVSC->Release ();
src->pVSC = NULL;
}
/* release the graph builder */
if (src->graph_builder) {
src->graph_builder->Release ();
src->graph_builder = NULL;
src->filter_graph = NULL;
}
/* release the capture builder */
if (src->capture_builder) {
src->capture_builder->Release ();
src->capture_builder = 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;
}
if (src->video_cap_filter) {
src->video_cap_filter->Release ();
src->video_cap_filter = 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;
}
GstCaps *
gst_dshowvideosrc_getcaps_from_streamcaps (IPin * pin, GList ** pins_mediatypes)
{
GstCaps *caps = NULL;
HRESULT hres = S_OK;
int icount = 0;
int isize = 0;
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 (VIDEO_STREAM_CONFIG_CAPS)) {
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;
} else if (gst_dshow_check_mediatype (pin_mediatype->mediatype,
MEDIASUBTYPE_MJPG, FORMAT_VideoInfo)) {
mediacaps =
gst_dshow_new_video_caps (GST_VIDEO_FORMAT_ENCODED,
"image/jpeg", pin_mediatype);
} else if (gst_dshow_check_mediatype (pin_mediatype->mediatype,
MEDIASUBTYPE_H264, FORMAT_VideoInfo)) {
mediacaps =
gst_dshow_new_video_caps (GST_VIDEO_FORMAT_ENCODED,
"video/x-h264", pin_mediatype);
}
if (mediacaps) {
if (pins_mediatypes != NULL) {
*pins_mediatypes = g_list_append (*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;
}
GstCaps *
gst_dshowvideosrc_getcaps_from_enum_mediatypes (IPin * pin, GList ** pins_mediatypes)
{
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) {
GstVideoInfo info;
gst_video_info_init(&info);
gst_video_info_set_format(&info, video_format, pin_mediatype->defaultWidth, pin_mediatype->defaultHeight);
info.fps_n = pin_mediatype->defaultFPS;
info.fps_d = 1;
info.par_n = 1;
info.par_d = 1;
info.interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE; /* XXX is this correct ? */
mediacaps = gst_video_info_to_caps(&info);
}
if (mediacaps) {
if (pins_mediatypes != NULL) {
*pins_mediatypes = g_list_append (*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;
GstMapInfo info;
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_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 (!gst_buffer_map(buf, &info, GST_MAP_WRITE)) {
gst_buffer_unref(buf);
GST_ERROR("Failed to map buffer");
return FALSE;
}
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 (info.data + (line * stride),
buffer + (size - ((line + 1) * (stride))), stride);
}
} else {
memcpy (info.data, buffer, size);
}
gst_buffer_unmap(buf, &info);
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;
}
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