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gstreamer/sys/decklink/gstdecklinksrc.cpp

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/* GStreamer
* Copyright (C) 2011 David Schleef <ds@schleef.org>
*
* 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 Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstdecklinksrc
*
* The decklinksrc element is a source element for Blackmagic
* Decklink cards.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v decklinksrc ! xvimagesink
* ]|
*
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
* with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <gst/gst.h>
#include <gst/glib-compat-private.h>
#include "gstdecklink.h"
#include "gstdecklinksrc.h"
#include "capture.h"
#include <string.h>
#include <gst/interfaces/propertyprobe.h>
GST_DEBUG_CATEGORY (gst_decklink_src_debug_category);
#define GST_CAT_DEFAULT gst_decklink_src_debug_category
/* prototypes */
typedef struct _VideoFrame VideoFrame;
struct _VideoFrame
{
IDeckLinkVideoInputFrame *frame;
IDeckLinkInput *input;
};
static void gst_decklink_src_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_decklink_src_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_decklink_src_dispose (GObject * object);
static void gst_decklink_src_finalize (GObject * object);
static GstPad *gst_decklink_src_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_decklink_src_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn
gst_decklink_src_change_state (GstElement * element, GstStateChange transition);
static GstClock *gst_decklink_src_provide_clock (GstElement * element);
static gboolean gst_decklink_src_set_clock (GstElement * element,
GstClock * clock);
static GstIndex *gst_decklink_src_get_index (GstElement * element);
static void gst_decklink_src_set_index (GstElement * element, GstIndex * index);
static gboolean gst_decklink_src_send_event (GstElement * element,
GstEvent * event);
static gboolean gst_decklink_src_query (GstElement * element, GstQuery * query);
static GstCaps *gst_decklink_src_audio_src_getcaps (GstPad * pad);
static gboolean gst_decklink_src_audio_src_setcaps (GstPad * pad,
GstCaps * caps);
static gboolean gst_decklink_src_audio_src_acceptcaps (GstPad * pad,
GstCaps * caps);
static void gst_decklink_src_audio_src_fixatecaps (GstPad * pad,
GstCaps * caps);
static gboolean gst_decklink_src_audio_src_activate (GstPad * pad);
static gboolean gst_decklink_src_audio_src_activatepush (GstPad * pad,
gboolean active);
static gboolean gst_decklink_src_audio_src_activatepull (GstPad * pad,
gboolean active);
static GstPadLinkReturn gst_decklink_src_audio_src_link (GstPad * pad,
GstPad * peer);
static GstFlowReturn gst_decklink_src_audio_src_getrange (GstPad * pad,
guint64 offset, guint length, GstBuffer ** buffer);
static gboolean gst_decklink_src_audio_src_event (GstPad * pad,
GstEvent * event);
static gboolean gst_decklink_src_audio_src_query (GstPad * pad,
GstQuery * query);
static GstIterator *gst_decklink_src_audio_src_iterintlink (GstPad * pad);
static GstCaps *gst_decklink_src_video_src_getcaps (GstPad * pad);
static gboolean gst_decklink_src_video_src_setcaps (GstPad * pad,
GstCaps * caps);
static gboolean gst_decklink_src_video_src_acceptcaps (GstPad * pad,
GstCaps * caps);
static void gst_decklink_src_video_src_fixatecaps (GstPad * pad,
GstCaps * caps);
static gboolean gst_decklink_src_video_src_activate (GstPad * pad);
static gboolean gst_decklink_src_video_src_activatepush (GstPad * pad,
gboolean active);
static gboolean gst_decklink_src_video_src_activatepull (GstPad * pad,
gboolean active);
static GstPadLinkReturn gst_decklink_src_video_src_link (GstPad * pad,
GstPad * peer);
static GstFlowReturn gst_decklink_src_video_src_getrange (GstPad * pad,
guint64 offset, guint length, GstBuffer ** buffer);
static gboolean gst_decklink_src_video_src_event (GstPad * pad,
GstEvent * event);
static gboolean gst_decklink_src_video_src_query (GstPad * pad,
GstQuery * query);
static GstIterator *gst_decklink_src_video_src_iterintlink (GstPad * pad);
static void
gst_decklinksrc_property_probe_interface_init (GstPropertyProbeInterface *
iface);
static void gst_decklink_src_task (void *priv);
#ifdef _MSC_VER
/* COM initialization/uninitialization thread */
static void gst_decklink_src_com_thread (GstDecklinkSrc * src);
#endif /* _MSC_VER */
enum
{
PROP_0,
PROP_MODE,
PROP_CONNECTION,
PROP_AUDIO_INPUT,
PROP_DEVICE
};
/* pad templates */
static GstStaticPadTemplate gst_decklink_src_audio_src_template =
GST_STATIC_PAD_TEMPLATE ("audiosrc",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int,width=16,depth=16,channels=2,rate=48000")
);
/* the video source pad template is created on the fly */
/* class initialization */
static void
gst_decklinksrc_init_interfaces (GType type)
{
static const GInterfaceInfo decklinksrc_propertyprobe_info = {
(GInterfaceInitFunc) gst_decklinksrc_property_probe_interface_init,
NULL,
NULL,
};
GST_DEBUG_CATEGORY_INIT (gst_decklink_src_debug_category, "decklinksrc", 0,
"debug category for decklinksrc element");
g_type_add_interface_static (type, GST_TYPE_PROPERTY_PROBE,
&decklinksrc_propertyprobe_info);
}
GST_BOILERPLATE_FULL (GstDecklinkSrc, gst_decklink_src, GstElement,
GST_TYPE_ELEMENT, gst_decklinksrc_init_interfaces);
static void
gst_decklink_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_decklink_src_audio_src_template));
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("videosrc", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_decklink_mode_get_template_caps ()));
gst_element_class_set_static_metadata (element_class, "Decklink source",
"Source/Video", "DeckLink Source", "David Schleef <ds@entropywave.com>");
}
static void
gst_decklink_src_class_init (GstDecklinkSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_decklink_src_set_property;
gobject_class->get_property = gst_decklink_src_get_property;
gobject_class->dispose = gst_decklink_src_dispose;
gobject_class->finalize = gst_decklink_src_finalize;
element_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_decklink_src_request_new_pad);
element_class->release_pad = GST_DEBUG_FUNCPTR (gst_decklink_src_release_pad);
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_decklink_src_change_state);
element_class->provide_clock =
GST_DEBUG_FUNCPTR (gst_decklink_src_provide_clock);
element_class->set_clock = GST_DEBUG_FUNCPTR (gst_decklink_src_set_clock);
element_class->get_index = GST_DEBUG_FUNCPTR (gst_decklink_src_get_index);
element_class->set_index = GST_DEBUG_FUNCPTR (gst_decklink_src_set_index);
element_class->send_event = GST_DEBUG_FUNCPTR (gst_decklink_src_send_event);
element_class->query = GST_DEBUG_FUNCPTR (gst_decklink_src_query);
g_object_class_install_property (gobject_class, PROP_MODE,
g_param_spec_enum ("mode", "Mode", "Video Mode to use for capture",
GST_TYPE_DECKLINK_MODE, GST_DECKLINK_MODE_NTSC,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_CONNECTION,
g_param_spec_enum ("connection", "Connection",
"Video Input Connection to use",
GST_TYPE_DECKLINK_CONNECTION, GST_DECKLINK_CONNECTION_SDI,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_AUDIO_INPUT,
g_param_spec_enum ("audio-input", "Audio Input",
"Audio Input Connection",
GST_TYPE_DECKLINK_AUDIO_CONNECTION,
GST_DECKLINK_AUDIO_CONNECTION_AUTO,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_DEVICE,
g_param_spec_int ("device", "Device", "Capture device instance to use",
0, G_MAXINT, 0,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
}
static void
gst_decklink_src_init (GstDecklinkSrc * decklinksrc,
GstDecklinkSrcClass * decklinksrc_class)
{
g_static_rec_mutex_init (&decklinksrc->task_mutex);
decklinksrc->task = gst_task_create (gst_decklink_src_task, decklinksrc);
gst_task_set_lock (decklinksrc->task, &decklinksrc->task_mutex);
decklinksrc->audiosrcpad =
gst_pad_new_from_static_template (&gst_decklink_src_audio_src_template,
"audiosrc");
gst_pad_set_getcaps_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_getcaps));
gst_pad_set_setcaps_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_setcaps));
gst_pad_set_acceptcaps_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_acceptcaps));
gst_pad_set_fixatecaps_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_fixatecaps));
gst_pad_set_activate_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_activate));
gst_pad_set_activatepush_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_activatepush));
gst_pad_set_activatepull_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_activatepull));
gst_pad_set_link_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_link));
gst_pad_set_getrange_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_getrange));
gst_pad_set_event_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_event));
gst_pad_set_query_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_query));
gst_pad_set_iterate_internal_links_function (decklinksrc->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_iterintlink));
gst_element_add_pad (GST_ELEMENT (decklinksrc), decklinksrc->audiosrcpad);
decklinksrc->videosrcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template
(GST_ELEMENT_CLASS (decklinksrc_class), "videosrc"), "videosrc");
gst_pad_set_getcaps_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_getcaps));
gst_pad_set_setcaps_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_setcaps));
gst_pad_set_acceptcaps_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_acceptcaps));
gst_pad_set_fixatecaps_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_fixatecaps));
gst_pad_set_activate_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_activate));
gst_pad_set_activatepush_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_activatepush));
gst_pad_set_activatepull_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_activatepull));
gst_pad_set_link_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_link));
gst_pad_set_getrange_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_getrange));
gst_pad_set_event_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_event));
gst_pad_set_query_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_query));
gst_pad_set_iterate_internal_links_function (decklinksrc->videosrcpad,
GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_iterintlink));
gst_element_add_pad (GST_ELEMENT (decklinksrc), decklinksrc->videosrcpad);
decklinksrc->cond = g_cond_new ();
decklinksrc->mutex = g_mutex_new ();
decklinksrc->copy_data = TRUE;
decklinksrc->mode = GST_DECKLINK_MODE_NTSC;
decklinksrc->connection = GST_DECKLINK_CONNECTION_SDI;
decklinksrc->audio_connection = GST_DECKLINK_AUDIO_CONNECTION_AUTO;
decklinksrc->device = 0;
decklinksrc->stop = FALSE;
decklinksrc->dropped_frames = 0;
decklinksrc->dropped_frames_old = 0;
decklinksrc->frame_num = -1; /* -1 so will be 0 after incrementing */
#ifdef _MSC_VER
decklinksrc->com_init_lock = g_mutex_new ();
decklinksrc->com_deinit_lock = g_mutex_new ();
decklinksrc->com_initialized = g_cond_new ();
decklinksrc->com_uninitialize = g_cond_new ();
decklinksrc->com_uninitialized = g_cond_new ();
g_mutex_lock (decklinksrc->com_init_lock);
/* create the COM initialization thread */
g_thread_create ((GThreadFunc) gst_decklink_src_com_thread,
decklinksrc, FALSE, NULL);
/* wait until the COM thread signals that COM has been initialized */
g_cond_wait (decklinksrc->com_initialized, decklinksrc->com_init_lock);
g_mutex_unlock (decklinksrc->com_init_lock);
#endif /* _MSC_VER */
}
void
gst_decklink_src_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstDecklinkSrc *decklinksrc;
g_return_if_fail (GST_IS_DECKLINK_SRC (object));
decklinksrc = GST_DECKLINK_SRC (object);
switch (property_id) {
case PROP_MODE:
decklinksrc->mode = (GstDecklinkModeEnum) g_value_get_enum (value);
break;
case PROP_CONNECTION:
decklinksrc->connection =
(GstDecklinkConnectionEnum) g_value_get_enum (value);
break;
case PROP_AUDIO_INPUT:
decklinksrc->audio_connection =
(GstDecklinkAudioConnectionEnum) g_value_get_enum (value);
break;
case PROP_DEVICE:
decklinksrc->device = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_src_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstDecklinkSrc *decklinksrc;
g_return_if_fail (GST_IS_DECKLINK_SRC (object));
decklinksrc = GST_DECKLINK_SRC (object);
switch (property_id) {
case PROP_MODE:
g_value_set_enum (value, decklinksrc->mode);
break;
case PROP_CONNECTION:
g_value_set_enum (value, decklinksrc->connection);
break;
case PROP_AUDIO_INPUT:
g_value_set_enum (value, decklinksrc->audio_connection);
break;
case PROP_DEVICE:
g_value_set_int (value, decklinksrc->device);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
#ifdef _MSC_VER
static void
gst_decklink_src_com_thread (GstDecklinkSrc * src)
{
HRESULT res;
g_mutex_lock (src->com_init_lock);
/* Initialize COM with a MTA for this process. This thread will
* be the first one to enter the apartement and the last one to leave
* it, unitializing COM properly */
res = CoInitializeEx (0, COINIT_MULTITHREADED);
if (res == S_FALSE)
GST_WARNING_OBJECT (src,
"COM has been already initialized in the same process");
else if (res == RPC_E_CHANGED_MODE)
GST_WARNING_OBJECT (src, "The concurrency model of COM has changed.");
else
GST_INFO_OBJECT (src, "COM intialized succesfully");
src->comInitialized = TRUE;
/* Signal other threads waiting on this condition that COM was initialized */
g_cond_signal (src->com_initialized);
g_mutex_unlock (src->com_init_lock);
/* Wait until the unitialize condition is met to leave the COM apartement */
g_mutex_lock (src->com_deinit_lock);
g_cond_wait (src->com_uninitialize, src->com_deinit_lock);
CoUninitialize ();
GST_INFO_OBJECT (src, "COM unintialized succesfully");
src->comInitialized = FALSE;
g_cond_signal (src->com_uninitialized);
g_mutex_unlock (src->com_deinit_lock);
}
#endif /* _MSC_VER */
void
gst_decklink_src_dispose (GObject * object)
{
g_return_if_fail (GST_IS_DECKLINK_SRC (object));
/* clean up as possible. may be called multiple times */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_decklink_src_finalize (GObject * object)
{
GstDecklinkSrc *decklinksrc;
g_return_if_fail (GST_IS_DECKLINK_SRC (object));
decklinksrc = GST_DECKLINK_SRC (object);
/* clean up object here */
g_cond_free (decklinksrc->cond);
g_mutex_free (decklinksrc->mutex);
gst_task_set_lock (decklinksrc->task, NULL);
g_object_unref (decklinksrc->task);
if (decklinksrc->audio_caps) {
gst_caps_unref (decklinksrc->audio_caps);
}
if (decklinksrc->video_caps) {
gst_caps_unref (decklinksrc->video_caps);
}
#ifdef _MSC_VER
/* signal the COM thread that it should uninitialize COM */
if (decklinksrc->comInitialized) {
g_mutex_lock (decklinksrc->com_deinit_lock);
g_cond_signal (decklinksrc->com_uninitialize);
g_cond_wait (decklinksrc->com_uninitialized, decklinksrc->com_deinit_lock);
g_mutex_unlock (decklinksrc->com_deinit_lock);
}
g_mutex_free (decklinksrc->com_init_lock);
g_mutex_free (decklinksrc->com_deinit_lock);
g_cond_free (decklinksrc->com_initialized);
g_cond_free (decklinksrc->com_uninitialize);
g_cond_free (decklinksrc->com_uninitialized);
#endif /* _MSC_VER */
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstPad *
gst_decklink_src_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name)
{
return NULL;
}
static void
gst_decklink_src_release_pad (GstElement * element, GstPad * pad)
{
}
static gboolean
gst_decklink_src_start (GstElement * element)
{
GstDecklinkSrc *decklinksrc = GST_DECKLINK_SRC (element);
DeckLinkCaptureDelegate *delegate;
BMDAudioSampleType sample_depth;
int channels;
HRESULT ret;
const GstDecklinkMode *mode;
IDeckLinkConfiguration *config;
BMDVideoConnection conn;
BMDAudioConnection aconn;
GST_DEBUG_OBJECT (decklinksrc, "start");
decklinksrc->decklink = gst_decklink_get_nth_device (decklinksrc->device);
if (decklinksrc->decklink == NULL) {
return FALSE;
}
decklinksrc->input = gst_decklink_get_nth_input (decklinksrc->device);
delegate = new DeckLinkCaptureDelegate ();
delegate->priv = decklinksrc;
ret = decklinksrc->input->SetCallback (delegate);
if (ret != S_OK) {
GST_ERROR ("set callback failed (input source)");
return FALSE;
}
decklinksrc->config = gst_decklink_get_nth_config (decklinksrc->device);
config = decklinksrc->config;
switch (decklinksrc->connection) {
default:
case GST_DECKLINK_CONNECTION_SDI:
conn = bmdVideoConnectionSDI;
aconn = bmdAudioConnectionEmbedded;
break;
case GST_DECKLINK_CONNECTION_HDMI:
conn = bmdVideoConnectionHDMI;
aconn = bmdAudioConnectionEmbedded;
break;
case GST_DECKLINK_CONNECTION_OPTICAL_SDI:
conn = bmdVideoConnectionOpticalSDI;
aconn = bmdAudioConnectionEmbedded;
break;
case GST_DECKLINK_CONNECTION_COMPONENT:
conn = bmdVideoConnectionComponent;
aconn = bmdAudioConnectionAnalog;
break;
case GST_DECKLINK_CONNECTION_COMPOSITE:
conn = bmdVideoConnectionComposite;
aconn = bmdAudioConnectionAnalog;
break;
case GST_DECKLINK_CONNECTION_SVIDEO:
conn = bmdVideoConnectionSVideo;
aconn = bmdAudioConnectionAnalog;
break;
}
ret = config->SetInt (bmdDeckLinkConfigVideoInputConnection, conn);
if (ret != S_OK) {
GST_ERROR ("set configuration (input source)");
return FALSE;
}
if (decklinksrc->connection == GST_DECKLINK_CONNECTION_COMPOSITE) {
ret = config->SetInt (bmdDeckLinkConfigAnalogVideoInputFlags,
bmdAnalogVideoFlagCompositeSetup75);
if (ret != S_OK) {
GST_ERROR ("set configuration (composite setup)");
return FALSE;
}
}
switch (decklinksrc->audio_connection) {
default:
case GST_DECKLINK_AUDIO_CONNECTION_AUTO:
/* set above */
break;
case GST_DECKLINK_AUDIO_CONNECTION_EMBEDDED:
aconn = bmdAudioConnectionEmbedded;
break;
case GST_DECKLINK_AUDIO_CONNECTION_AES_EBU:
aconn = bmdAudioConnectionAESEBU;
break;
case GST_DECKLINK_AUDIO_CONNECTION_ANALOG:
aconn = bmdAudioConnectionAnalog;
break;
}
ret = config->SetInt (bmdDeckLinkConfigAudioInputConnection, aconn);
if (ret != S_OK) {
GST_ERROR ("set configuration (audio input connection)");
return FALSE;
}
mode = gst_decklink_get_mode (decklinksrc->mode);
ret = decklinksrc->input->EnableVideoInput (mode->mode, bmdFormat8BitYUV, 0);
if (ret != S_OK) {
GST_ERROR ("enable video input failed");
return FALSE;
}
sample_depth = bmdAudioSampleType16bitInteger;
channels = 2;
ret = decklinksrc->input->EnableAudioInput (bmdAudioSampleRate48kHz,
sample_depth, channels);
if (ret != S_OK) {
GST_ERROR ("enable video input failed");
return FALSE;
}
ret = decklinksrc->input->StartStreams ();
if (ret != S_OK) {
GST_ERROR ("start streams failed");
return FALSE;
}
g_static_rec_mutex_lock (&decklinksrc->task_mutex);
gst_task_start (decklinksrc->task);
g_static_rec_mutex_unlock (&decklinksrc->task_mutex);
return TRUE;
}
static gboolean
gst_decklink_src_stop (GstElement * element)
{
GstDecklinkSrc *decklinksrc = GST_DECKLINK_SRC (element);
//int refcount;
gst_task_stop (decklinksrc->task);
g_mutex_lock (decklinksrc->mutex);
decklinksrc->stop = TRUE;
g_cond_signal (decklinksrc->cond);
g_mutex_unlock (decklinksrc->mutex);
gst_task_join (decklinksrc->task);
decklinksrc->input->StopStreams ();
decklinksrc->input->DisableVideoInput ();
decklinksrc->input->DisableAudioInput ();
return TRUE;
}
static GstStateChangeReturn
gst_decklink_src_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
gboolean no_preroll = FALSE;
g_return_val_if_fail (GST_IS_DECKLINK_SRC (element),
GST_STATE_CHANGE_FAILURE);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_decklink_src_start (element)) {
ret = GST_STATE_CHANGE_FAILURE;
goto out;
}
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
no_preroll = TRUE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
no_preroll = TRUE;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_decklink_src_stop (element);
break;
default:
break;
}
if (no_preroll && ret == GST_STATE_CHANGE_SUCCESS)
ret = GST_STATE_CHANGE_NO_PREROLL;
out:
return ret;
}
static GstClock *
gst_decklink_src_provide_clock (GstElement * element)
{
return NULL;
}
static gboolean
gst_decklink_src_set_clock (GstElement * element, GstClock * clock)
{
return GST_ELEMENT_CLASS (parent_class)->set_clock (element, clock);
}
static GstIndex *
gst_decklink_src_get_index (GstElement * element)
{
return NULL;
}
static void
gst_decklink_src_set_index (GstElement * element, GstIndex * index)
{
}
static gboolean
gst_decklink_src_send_event (GstElement * element, GstEvent * event)
{
return TRUE;
}
static gboolean
gst_decklink_src_query (GstElement * element, GstQuery * query)
{
GstDecklinkSrc *decklinksrc = GST_DECKLINK_SRC (element);
gboolean ret;
GST_DEBUG_OBJECT (decklinksrc, "query");
switch (GST_QUERY_TYPE (query)) {
default:
ret = GST_ELEMENT_CLASS (parent_class)->query (element, query);
break;
}
return ret;
}
static GstCaps *
gst_decklink_src_audio_src_getcaps (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
GstCaps *caps;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "getcaps");
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
gst_object_unref (decklinksrc);
return caps;
}
static gboolean
gst_decklink_src_audio_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstDecklinkSrc *decklinksrc;
GstCaps *pad_caps;
gboolean can_intersect;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
pad_caps = gst_pad_get_caps (pad);
can_intersect = gst_caps_can_intersect (pad_caps, caps);
gst_caps_unref (pad_caps);
GST_DEBUG_OBJECT (decklinksrc, "setcaps");
gst_object_unref (decklinksrc);
return can_intersect;
}
static gboolean
gst_decklink_src_audio_src_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstDecklinkSrc *decklinksrc;
GstCaps *pad_caps;
gboolean can_intersect;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
pad_caps = gst_pad_get_caps (pad);
can_intersect = gst_caps_can_intersect (pad_caps, caps);
gst_caps_unref (pad_caps);
GST_DEBUG_OBJECT (decklinksrc, "acceptcaps");
gst_object_unref (decklinksrc);
return can_intersect;
}
static void
gst_decklink_src_audio_src_fixatecaps (GstPad * pad, GstCaps * caps)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "fixatecaps");
gst_object_unref (decklinksrc);
}
static gboolean
gst_decklink_src_audio_src_activate (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
gboolean ret;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activate");
if (gst_pad_check_pull_range (pad)) {
GST_DEBUG_OBJECT (pad, "activating pull");
ret = gst_pad_activate_pull (pad, TRUE);
} else {
GST_DEBUG_OBJECT (pad, "activating push");
ret = gst_pad_activate_push (pad, TRUE);
}
gst_object_unref (decklinksrc);
return ret;
}
static gboolean
gst_decklink_src_audio_src_activatepush (GstPad * pad, gboolean active)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activatepush");
gst_object_unref (decklinksrc);
return TRUE;
}
static gboolean
gst_decklink_src_audio_src_activatepull (GstPad * pad, gboolean active)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activatepull");
gst_object_unref (decklinksrc);
return FALSE;
}
static GstPadLinkReturn
gst_decklink_src_audio_src_link (GstPad * pad, GstPad * peer)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "link");
gst_object_unref (decklinksrc);
return GST_PAD_LINK_OK;
}
static GstFlowReturn
gst_decklink_src_audio_src_getrange (GstPad * pad, guint64 offset, guint length,
GstBuffer ** buffer)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "getrange");
gst_object_unref (decklinksrc);
return GST_FLOW_OK;
}
static gboolean
gst_decklink_src_audio_src_event (GstPad * pad, GstEvent * event)
{
gboolean res;
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "event");
switch (GST_EVENT_TYPE (event)) {
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (decklinksrc);
return res;
}
static gboolean
gst_decklink_src_audio_src_query (GstPad * pad, GstQuery * query)
{
gboolean res;
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "query");
switch (GST_QUERY_TYPE (query)) {
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (decklinksrc);
return res;
}
static GstIterator *
gst_decklink_src_audio_src_iterintlink (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
GstIterator *iter;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "iterintlink");
iter = gst_pad_iterate_internal_links_default (pad);
gst_object_unref (decklinksrc);
return iter;
}
static GstCaps *
gst_decklink_src_video_src_getcaps (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
GstCaps *caps;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "getcaps");
caps = gst_decklink_mode_get_caps (decklinksrc->mode);
gst_object_unref (decklinksrc);
return caps;
}
static gboolean
gst_decklink_src_video_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstDecklinkSrc *decklinksrc;
GstCaps *mode_caps;
gboolean can_intersect;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "setcaps");
mode_caps = gst_decklink_mode_get_caps (decklinksrc->mode);
can_intersect = gst_caps_can_intersect (mode_caps, caps);
gst_caps_unref (mode_caps);
gst_object_unref (decklinksrc);
return can_intersect;
}
static gboolean
gst_decklink_src_video_src_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstDecklinkSrc *decklinksrc;
GstCaps *mode_caps;
gboolean can_intersect;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "acceptcaps");
mode_caps = gst_decklink_mode_get_caps (decklinksrc->mode);
can_intersect = gst_caps_can_intersect (mode_caps, caps);
gst_caps_unref (mode_caps);
gst_object_unref (decklinksrc);
return can_intersect;
}
static void
gst_decklink_src_video_src_fixatecaps (GstPad * pad, GstCaps * caps)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "fixatecaps");
gst_object_unref (decklinksrc);
}
static gboolean
gst_decklink_src_video_src_activate (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
gboolean ret;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activate");
if (gst_pad_check_pull_range (pad)) {
GST_DEBUG_OBJECT (pad, "activating pull");
ret = gst_pad_activate_pull (pad, TRUE);
} else {
GST_DEBUG_OBJECT (pad, "activating push");
ret = gst_pad_activate_push (pad, TRUE);
}
gst_object_unref (decklinksrc);
return ret;
}
static gboolean
gst_decklink_src_video_src_activatepush (GstPad * pad, gboolean active)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activatepush");
gst_object_unref (decklinksrc);
return TRUE;
}
static gboolean
gst_decklink_src_video_src_activatepull (GstPad * pad, gboolean active)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "activatepull");
gst_object_unref (decklinksrc);
return FALSE;
}
static GstPadLinkReturn
gst_decklink_src_video_src_link (GstPad * pad, GstPad * peer)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "link");
gst_object_unref (decklinksrc);
return GST_PAD_LINK_OK;
}
static GstFlowReturn
gst_decklink_src_video_src_getrange (GstPad * pad, guint64 offset, guint length,
GstBuffer ** buffer)
{
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "getrange");
gst_object_unref (decklinksrc);
return GST_FLOW_OK;
}
static gboolean
gst_decklink_src_video_src_event (GstPad * pad, GstEvent * event)
{
gboolean res;
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "event");
switch (GST_EVENT_TYPE (event)) {
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (decklinksrc);
return res;
}
static gboolean
gst_decklink_src_video_src_query (GstPad * pad, GstQuery * query)
{
gboolean ret = FALSE;
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "query");
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
const GstDecklinkMode *mode;
/* device must be open */
if (decklinksrc->decklink == NULL) {
GST_WARNING_OBJECT (decklinksrc,
"Can't give latency since device isn't open !");
goto done;
}
mode = gst_decklink_get_mode (decklinksrc->mode);
/* min latency is the time to capture one frame */
min_latency =
gst_util_uint64_scale_int (GST_SECOND, mode->fps_d, mode->fps_n);
/* max latency is total duration of the frame buffer */
max_latency = 2 * min_latency;
GST_DEBUG_OBJECT (decklinksrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
ret = TRUE;
break;
}
default:
ret = gst_pad_query_default (pad, query);
break;
}
done:
gst_object_unref (decklinksrc);
return ret;
}
static GstIterator *
gst_decklink_src_video_src_iterintlink (GstPad * pad)
{
GstDecklinkSrc *decklinksrc;
GstIterator *iter;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (decklinksrc, "iterintlink");
iter = gst_pad_iterate_internal_links_default (pad);
gst_object_unref (decklinksrc);
return iter;
}
static void
video_frame_free (void *data)
{
VideoFrame *video_frame = (VideoFrame *) data;
video_frame->frame->Release ();
video_frame->input->Release ();
g_free (video_frame);
}
static void
gst_decklink_src_task (void *priv)
{
GstDecklinkSrc *decklinksrc = GST_DECKLINK_SRC (priv);
GstBuffer *buffer;
GstBuffer *audio_buffer;
IDeckLinkVideoInputFrame *video_frame;
IDeckLinkAudioInputPacket *audio_frame;
void *data;
int n_samples;
GstFlowReturn ret;
const GstDecklinkMode *mode;
GST_DEBUG_OBJECT (decklinksrc, "task");
g_mutex_lock (decklinksrc->mutex);
while (decklinksrc->video_frame == NULL && !decklinksrc->stop) {
g_cond_wait (decklinksrc->cond, decklinksrc->mutex);
}
video_frame = decklinksrc->video_frame;
audio_frame = decklinksrc->audio_frame;
decklinksrc->video_frame = NULL;
decklinksrc->audio_frame = NULL;
g_mutex_unlock (decklinksrc->mutex);
if (decklinksrc->stop) {
if (video_frame)
video_frame->Release ();
if (audio_frame)
audio_frame->Release ();
GST_DEBUG ("stopping task");
return;
}
/* warning on dropped frames */
if (decklinksrc->dropped_frames - decklinksrc->dropped_frames_old > 0) {
GST_ELEMENT_WARNING (decklinksrc, RESOURCE, READ,
("Dropped %d frame(s), for a total of %d frame(s)",
decklinksrc->dropped_frames - decklinksrc->dropped_frames_old,
decklinksrc->dropped_frames), (NULL));
decklinksrc->dropped_frames_old = decklinksrc->dropped_frames;
}
if (!decklinksrc->video_new_segment) {
GstEvent *event;
gboolean ret;
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
0, GST_CLOCK_TIME_NONE, 0);
ret = gst_pad_push_event (decklinksrc->videosrcpad, event);
if (!ret) {
GST_WARNING ("new segment event not handled");
}
decklinksrc->video_new_segment = TRUE;
}
mode = gst_decklink_get_mode (decklinksrc->mode);
video_frame->GetBytes (&data);
if (decklinksrc->copy_data) {
buffer = gst_buffer_new_and_alloc (mode->width * mode->height * 2);
memcpy (GST_BUFFER_DATA (buffer), data, mode->width * mode->height * 2);
video_frame->Release ();
} else {
VideoFrame *vf;
vf = (VideoFrame *) g_malloc0 (sizeof (VideoFrame));
buffer = gst_buffer_new ();
GST_BUFFER_SIZE (buffer) = mode->width * mode->height * 2;
GST_BUFFER_DATA (buffer) = (guint8 *) data;
GST_BUFFER_FREE_FUNC (buffer) = video_frame_free;
GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) vf;
vf->frame = video_frame;
vf->input = decklinksrc->input;
vf->input->AddRef ();
}
GST_BUFFER_TIMESTAMP (buffer) =
gst_util_uint64_scale_int (decklinksrc->frame_num * GST_SECOND,
mode->fps_d, mode->fps_n);
GST_BUFFER_DURATION (buffer) =
gst_util_uint64_scale_int ((decklinksrc->frame_num + 1) * GST_SECOND,
mode->fps_d, mode->fps_n) - GST_BUFFER_TIMESTAMP (buffer);
GST_BUFFER_OFFSET (buffer) = decklinksrc->frame_num;
GST_BUFFER_OFFSET_END (buffer) = decklinksrc->frame_num;
if (decklinksrc->frame_num == 0) {
GstEvent *event;
gboolean ret;
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0,
GST_CLOCK_TIME_NONE, 0);
if (gst_pad_is_linked (decklinksrc->videosrcpad)) {
gst_event_ref (event);
ret = gst_pad_push_event (decklinksrc->videosrcpad, event);
if (!ret) {
GST_ERROR_OBJECT (decklinksrc, "new segment event ret=%d", ret);
gst_event_unref (event);
return;
}
} else {
gst_event_unref (event);
}
if (gst_pad_is_linked (decklinksrc->audiosrcpad)) {
ret = gst_pad_push_event (decklinksrc->audiosrcpad, event);
if (!ret) {
GST_ERROR_OBJECT (decklinksrc, "new segment event ret=%d", ret);
gst_event_unref (event);
}
} else {
gst_event_unref (event);
}
}
if (decklinksrc->video_caps == NULL) {
decklinksrc->video_caps = gst_decklink_mode_get_caps (decklinksrc->mode);
}
gst_buffer_set_caps (buffer, decklinksrc->video_caps);
ret = gst_pad_push (decklinksrc->videosrcpad, buffer);
if (!(ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED ||
ret == GST_FLOW_WRONG_STATE)) {
GST_ELEMENT_ERROR (decklinksrc, STREAM, FAILED,
("Internal data stream error."),
("stream stopped, reason %s", gst_flow_get_name (ret)));
}
if (gst_pad_is_linked (decklinksrc->audiosrcpad)) {
if (!decklinksrc->audio_new_segment) {
GstEvent *event;
gboolean ret;
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
0, GST_CLOCK_TIME_NONE, 0);
ret = gst_pad_push_event (decklinksrc->audiosrcpad, event);
if (!ret) {
GST_WARNING ("new segment event not handled");
}
decklinksrc->audio_new_segment = TRUE;
}
n_samples = audio_frame->GetSampleFrameCount ();
audio_frame->GetBytes (&data);
audio_buffer = gst_buffer_new_and_alloc (n_samples * 2 * 2);
memcpy (GST_BUFFER_DATA (audio_buffer), data, n_samples * 2 * 2);
GST_BUFFER_TIMESTAMP (audio_buffer) =
gst_util_uint64_scale_int (decklinksrc->num_audio_samples * GST_SECOND,
1, 48000);
GST_BUFFER_DURATION (audio_buffer) =
gst_util_uint64_scale_int (n_samples * GST_SECOND, 1, 48000);
decklinksrc->num_audio_samples += n_samples;
if (decklinksrc->audio_caps == NULL) {
decklinksrc->audio_caps = gst_caps_new_simple ("audio/x-raw-int",
"endianness", G_TYPE_INT, G_LITTLE_ENDIAN,
"signed", G_TYPE_BOOLEAN, TRUE,
"depth", G_TYPE_INT, 16,
"width", G_TYPE_INT, 16,
"channels", G_TYPE_INT, 2, "rate", G_TYPE_INT, 48000, NULL);
}
gst_buffer_set_caps (audio_buffer, decklinksrc->audio_caps);
ret = gst_pad_push (decklinksrc->audiosrcpad, audio_buffer);
if (!(ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED ||
ret == GST_FLOW_WRONG_STATE)) {
GST_ELEMENT_ERROR (decklinksrc, STREAM, FAILED,
("Internal data stream error."),
("stream stopped, reason %s", gst_flow_get_name (ret)));
}
}
if (audio_frame)
audio_frame->Release ();
}
static const GList *
gst_decklinksrc_probe_get_properties (GstPropertyProbe * probe)
{
GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
static GList *list = NULL;
static gsize init = 0;
if (g_once_init_enter (&init)) {
list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
g_once_init_leave (&init, 1);
}
return list;
}
static gboolean probed = FALSE;
static int n_devices;
static void
gst_decklinksrc_class_probe_devices (GstElementClass * klass)
{
IDeckLinkIterator *iterator;
IDeckLink *decklink;
n_devices = 0;
iterator = CreateDeckLinkIteratorInstance ();
if (iterator) {
while (iterator->Next (&decklink) == S_OK) {
n_devices++;
}
}
iterator->Release();
probed = TRUE;
}
static void
gst_decklinksrc_probe_probe_property (GstPropertyProbe * probe,
guint prop_id, const GParamSpec * pspec)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
switch (prop_id) {
case PROP_DEVICE:
gst_decklinksrc_class_probe_devices (klass);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
break;
}
}
static gboolean
gst_decklinksrc_probe_needs_probe (GstPropertyProbe * probe,
guint prop_id, const GParamSpec * pspec)
{
gboolean ret = FALSE;
switch (prop_id) {
case PROP_DEVICE:
ret = !probed;
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
break;
}
return ret;
}
static GValueArray *
gst_decklinksrc_class_list_devices (GstElementClass * klass)
{
GValueArray *array;
GValue value = { 0 };
int i;
array = g_value_array_new (n_devices);
g_value_init (&value, G_TYPE_INT);
for (i = 0; i < n_devices; i++) {
g_value_set_int (&value, i);
g_value_array_append (array, &value);
}
g_value_unset (&value);
return array;
}
static GValueArray *
gst_decklinksrc_probe_get_values (GstPropertyProbe * probe,
guint prop_id, const GParamSpec * pspec)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (probe);
GValueArray *array = NULL;
switch (prop_id) {
case PROP_DEVICE:
array = gst_decklinksrc_class_list_devices (klass);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
break;
}
return array;
}
static void
gst_decklinksrc_property_probe_interface_init (GstPropertyProbeInterface *
iface)
{
iface->get_properties = gst_decklinksrc_probe_get_properties;
iface->probe_property = gst_decklinksrc_probe_probe_property;
iface->needs_probe = gst_decklinksrc_probe_needs_probe;
iface->get_values = gst_decklinksrc_probe_get_values;
}
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