/* GStreamer * Copyright (C) 2011 David Schleef * * 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. * * * Example launch line * |[ * gst-launch-1.0 -v decklinksrc ! videoconvert ! xvimagesink * ]| * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstdecklink.h" #include "gstdecklinksrc.h" #include "capture.h" #include GST_DEBUG_CATEGORY (gst_decklink_src_debug_category); #define GST_CAT_DEFAULT gst_decklink_src_debug_category 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_finalize (GObject * object); static GstStateChangeReturn gst_decklink_src_change_state (GstElement * element, GstStateChange transition); static gboolean gst_decklink_src_send_event (GstElement * element, GstEvent * event); static gboolean gst_decklink_src_audio_src_query (GstPad * pad, GstObject * parent, GstQuery * query); static gboolean gst_decklink_src_video_src_query (GstPad * pad, GstObject * parent, GstQuery * query); 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_NUMBER }; 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, format=S16LE, channels=2, rate=48000, " "layout=interleaved") ); /* the video source pad template is created on the fly */ #define parent_class gst_decklink_src_parent_class G_DEFINE_TYPE (GstDecklinkSrc, gst_decklink_src, GST_TYPE_ELEMENT); 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->finalize = gst_decklink_src_finalize; element_class->send_event = GST_DEBUG_FUNCPTR (gst_decklink_src_send_event); element_class->change_state = GST_DEBUG_FUNCPTR (gst_decklink_src_change_state); 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_NUMBER, g_param_spec_int ("device-number", "Device number", "Capture device instance to use", 0, G_MAXINT, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT))); 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 "); } static void gst_decklink_src_init (GstDecklinkSrc * decklinksrc) { GstDecklinkSrcClass *decklinksrc_class; decklinksrc_class = GST_DECKLINK_SRC_GET_CLASS (decklinksrc); g_rec_mutex_init (&decklinksrc->task_mutex); decklinksrc->task = gst_task_new (gst_decklink_src_task, decklinksrc, NULL); 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_query_function (decklinksrc->audiosrcpad, GST_DEBUG_FUNCPTR (gst_decklink_src_audio_src_query)); 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_query_function (decklinksrc->videosrcpad, GST_DEBUG_FUNCPTR (gst_decklink_src_video_src_query)); gst_element_add_pad (GST_ELEMENT (decklinksrc), decklinksrc->videosrcpad); GST_OBJECT_FLAG_SET (decklinksrc, GST_ELEMENT_FLAG_SOURCE); g_cond_init (&decklinksrc->cond); g_mutex_init (&decklinksrc->mutex); /* FIXME: turn this into a property? */ 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_number = 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 g_mutex_init (&decklinksrc->com_init_lock); g_mutex_init (&decklinksrc->com_deinit_lock); g_cond_init (&decklinksrc->com_initialized); g_cond_init (&decklinksrc->com_uninitialize); g_cond_init (&decklinksrc->com_uninitialized); 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 */ GST_DEBUG_CATEGORY_INIT (gst_decklink_src_debug_category, "decklinksrc", 0, "debug category for decklinksrc element"); } void gst_decklink_src_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GstDecklinkSrc *decklinksrc; 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_NUMBER: decklinksrc->device_number = 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; 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_NUMBER: g_value_set_int (value, decklinksrc->device_number); 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_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_clear (&decklinksrc->cond); g_mutex_clear (&decklinksrc->mutex); gst_task_set_lock (decklinksrc->task, NULL); g_object_unref (decklinksrc->task); #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_clear (&decklinksrc->com_init_lock); g_mutex_clear (&decklinksrc->com_deinit_lock); g_cond_clear (&decklinksrc->com_initialized); g_cond_clear (&decklinksrc->com_uninitialize); g_cond_clear (&decklinksrc->com_uninitialized); #endif /* _MSC_VER */ g_rec_mutex_clear (&decklinksrc->task_mutex); G_OBJECT_CLASS (parent_class)->finalize (object); } /* events sent to this element directly, mainly from the application */ static gboolean gst_decklink_src_send_event (GstElement * element, GstEvent * event) { GstDecklinkSrc *src; gboolean result = FALSE; src = GST_DECKLINK_SRC (element); GST_DEBUG_OBJECT (src, "handling event %p %" GST_PTR_FORMAT, event, event); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: g_atomic_int_set (&src->pending_eos, TRUE); GST_INFO_OBJECT (src, "EOS pending"); g_cond_signal (&src->cond); result = TRUE; break; break; case GST_EVENT_TAG: case GST_EVENT_CUSTOM_DOWNSTREAM: case GST_EVENT_CUSTOM_BOTH: /* Insert TAG, CUSTOM_DOWNSTREAM, CUSTOM_BOTH in the dataflow */ GST_OBJECT_LOCK (src); src->pending_events = g_list_append (src->pending_events, event); g_atomic_int_set (&src->have_events, TRUE); GST_OBJECT_UNLOCK (src); event = NULL; result = TRUE; break; case GST_EVENT_CUSTOM_DOWNSTREAM_OOB: case GST_EVENT_CUSTOM_BOTH_OOB: /* insert a random custom event into the pipeline */ GST_DEBUG_OBJECT (src, "pushing custom OOB event downstream"); result = gst_pad_push_event (src->videosrcpad, gst_event_ref (event)); result |= gst_pad_push_event (src->audiosrcpad, event); /* we gave away the ref to the event in the push */ event = NULL; break; case GST_EVENT_CUSTOM_UPSTREAM: /* drop */ case GST_EVENT_SEGMENT: /* sending random SEGMENT downstream can break sync - drop */ default: GST_LOG_OBJECT (src, "dropping %s event", GST_EVENT_TYPE_NAME (event)); break; } /* if we still have a ref to the event, unref it now */ if (event) gst_event_unref (event); return result; } /* FIXME: post error messages for the misc. failures */ 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_number); if (decklinksrc->decklink == NULL) { return FALSE; } decklinksrc->input = gst_decklink_get_nth_input (decklinksrc->device_number); 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_number); 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_rec_mutex_lock (&decklinksrc->task_mutex); gst_task_start (decklinksrc->task); g_rec_mutex_unlock (&decklinksrc->task_mutex); return TRUE; } static gboolean gst_decklink_src_stop (GstElement * element) { GstDecklinkSrc *decklinksrc = GST_DECKLINK_SRC (element); 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 (); g_list_free_full (decklinksrc->pending_events, (GDestroyNotify) gst_mini_object_unref); decklinksrc->pending_events = NULL; decklinksrc->have_events = FALSE; decklinksrc->pending_eos = FALSE; return TRUE; } static GstStateChangeReturn gst_decklink_src_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; gboolean no_preroll = FALSE; 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 gboolean gst_decklink_src_audio_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { gboolean res; GST_DEBUG_OBJECT (pad, "query: %" GST_PTR_FORMAT, query); switch (GST_QUERY_TYPE (query)) { /* FIXME: report live-ness and latency for audio too */ case GST_QUERY_LATENCY: GST_FIXME_OBJECT (parent, "should report live-ness and audio latency"); res = gst_pad_query_default (pad, parent, query); break; default: res = gst_pad_query_default (pad, parent, query); break; } return res; } static gboolean gst_decklink_src_video_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { GstDecklinkSrc *decklinksrc; gboolean ret = FALSE; decklinksrc = GST_DECKLINK_SRC (parent); GST_DEBUG_OBJECT (pad, "query: %" GST_PTR_FORMAT, 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, parent, query); break; } done: return ret; } 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_send_initial_events (GstDecklinkSrc * src) { GstSegment segment; GstEvent *event; guint group_id; guint32 audio_id, video_id; gchar stream_id[9]; /* stream-start */ audio_id = g_random_int (); video_id = g_random_int (); while (video_id == audio_id) video_id = g_random_int (); group_id = gst_util_group_id_next (); g_snprintf (stream_id, sizeof (stream_id), "%08x", audio_id); event = gst_event_new_stream_start (stream_id); gst_event_set_group_id (event, group_id); gst_pad_push_event (src->audiosrcpad, event); g_snprintf (stream_id, sizeof (stream_id), "%08x", video_id); event = gst_event_new_stream_start (stream_id); gst_event_set_group_id (event, group_id); gst_pad_push_event (src->videosrcpad, event); /* caps */ gst_pad_push_event (src->audiosrcpad, gst_event_new_caps (gst_caps_new_simple ("audio/x-raw", "format", G_TYPE_STRING, "S16LE", "channels", G_TYPE_INT, 2, "rate", G_TYPE_INT, 48000, "layout", G_TYPE_STRING, "interleaved", NULL))); gst_pad_push_event (src->videosrcpad, gst_event_new_caps (gst_decklink_mode_get_caps (src->mode))); /* segment */ gst_segment_init (&segment, GST_FORMAT_TIME); event = gst_event_new_segment (&segment); gst_pad_push_event (src->videosrcpad, gst_event_ref (event)); gst_pad_push_event (src->audiosrcpad, event); } 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; gsize data_size; int n_samples; GstFlowReturn video_flow, audio_flow, flow; const GstDecklinkMode *mode; gboolean discont = FALSE; GST_DEBUG_OBJECT (decklinksrc, "task"); g_mutex_lock (&decklinksrc->mutex); while (decklinksrc->video_frame == NULL && !decklinksrc->stop && !decklinksrc->pending_eos) { 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; } if (g_atomic_int_compare_and_exchange (&decklinksrc->pending_eos, TRUE, FALSE)) { GST_INFO_OBJECT (decklinksrc, "EOS pending"); flow = GST_FLOW_EOS; goto pause; } /* warning on dropped frames */ /* FIXME: post QoS message */ 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; /* FIXME: discont = TRUE; ? */ } if (!decklinksrc->started) { gst_decklink_src_send_initial_events (decklinksrc); decklinksrc->started = TRUE; } if (g_atomic_int_get (&decklinksrc->have_events)) { GList *l; GST_OBJECT_LOCK (decklinksrc); for (l = decklinksrc->pending_events; l != NULL; l = l->next) { GstEvent *event = GST_EVENT (l->data); GST_DEBUG_OBJECT (decklinksrc, "pushing %s event", GST_EVENT_TYPE_NAME (event)); gst_pad_push_event (decklinksrc->videosrcpad, gst_event_ref (event)); gst_pad_push_event (decklinksrc->audiosrcpad, event); l->data = NULL; } g_list_free (decklinksrc->pending_events); decklinksrc->pending_events = NULL; g_atomic_int_set (&decklinksrc->have_events, FALSE); GST_OBJECT_UNLOCK (decklinksrc); } mode = gst_decklink_get_mode (decklinksrc->mode); video_frame->GetBytes (&data); data_size = mode->width * mode->height * 2; if (decklinksrc->copy_data) { buffer = gst_buffer_new_and_alloc (data_size); gst_buffer_fill (buffer, 0, data, data_size); video_frame->Release (); } else { VideoFrame *vf; vf = (VideoFrame *) g_malloc0 (sizeof (VideoFrame)); buffer = gst_buffer_new_wrapped_full ((GstMemoryFlags) 0, data, data_size, 0, data_size, vf, (GDestroyNotify) video_frame_free); 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; /* FIXME: +1? */ /* FIXME: set video meta */ if (decklinksrc->frame_num == 0) discont = TRUE; if (discont) GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT); else GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT); video_flow = gst_pad_push (decklinksrc->videosrcpad, buffer); if (gst_pad_is_linked (decklinksrc->audiosrcpad)) { n_samples = audio_frame->GetSampleFrameCount (); audio_frame->GetBytes (&data); audio_buffer = gst_buffer_new_and_alloc (n_samples * 2 * 2); gst_buffer_fill (audio_buffer, 0, data, n_samples * 2 * 2); GST_BUFFER_TIMESTAMP (audio_buffer) = gst_util_uint64_scale_int (decklinksrc->num_audio_samples * GST_SECOND, 1, 48000); /* FIXME: should be next_timestamp - timestamp for perfect stream */ GST_BUFFER_DURATION (audio_buffer) = gst_util_uint64_scale_int (n_samples * GST_SECOND, 1, 48000); GST_BUFFER_OFFSET (audio_buffer) = decklinksrc->num_audio_samples; GST_BUFFER_OFFSET_END (audio_buffer) = GST_BUFFER_OFFSET (audio_buffer) + n_samples; decklinksrc->num_audio_samples += n_samples; if (discont) GST_BUFFER_FLAG_SET (audio_buffer, GST_BUFFER_FLAG_DISCONT); else GST_BUFFER_FLAG_UNSET (audio_buffer, GST_BUFFER_FLAG_DISCONT); audio_flow = gst_pad_push (decklinksrc->audiosrcpad, audio_buffer); } else { audio_flow = GST_FLOW_NOT_LINKED; } if (audio_flow == GST_FLOW_NOT_LINKED) flow = video_flow; else if (video_flow == GST_FLOW_NOT_LINKED) flow = audio_flow; else if (video_flow == GST_FLOW_FLUSHING || audio_flow == GST_FLOW_FLUSHING) flow = GST_FLOW_FLUSHING; else if (video_flow < GST_FLOW_EOS) flow = video_flow; else if (audio_flow < GST_FLOW_EOS) flow = audio_flow; else if (video_flow == GST_FLOW_EOS || audio_flow == GST_FLOW_EOS) flow = GST_FLOW_EOS; else flow = video_flow; if (flow != GST_FLOW_OK) goto pause; done: if (audio_frame) audio_frame->Release (); return; pause: { const gchar *reason = gst_flow_get_name (flow); GstEvent *event = NULL; GST_DEBUG_OBJECT (decklinksrc, "pausing task, reason %s", reason); gst_task_pause (decklinksrc->task); if (flow == GST_FLOW_EOS) { /* perform EOS logic (very crude, we don't even keep a GstSegment) */ event = gst_event_new_eos (); } else if (flow == GST_FLOW_NOT_LINKED || flow < GST_FLOW_EOS) { event = gst_event_new_eos (); /* for fatal errors we post an error message, post the error * first so the app knows about the error first. * Also don't do this for FLUSHING because it happens * due to flushing and posting an error message because of * that is the wrong thing to do, e.g. when we're doing * a flushing seek. */ GST_ELEMENT_ERROR (decklinksrc, STREAM, FAILED, ("Internal data flow error."), ("streaming task paused, reason %s (%d)", reason, flow)); } if (event != NULL) { GST_INFO_OBJECT (decklinksrc->videosrcpad, "pushing EOS event"); gst_pad_push_event (decklinksrc->videosrcpad, gst_event_ref (event)); GST_INFO_OBJECT (decklinksrc->audiosrcpad, "pushing EOS event"); gst_pad_push_event (decklinksrc->audiosrcpad, event); } goto done; } } #if 0 /* former device probe code, redux */ static void gst_decklinksrc_list_devices (void) { IDeckLinkIterator *iterator; IDeckLink *decklink; int n_devices; n_devices = 0; iterator = CreateDeckLinkIteratorInstance (); if (iterator) { while (iterator->Next (&decklink) == S_OK) { n_devices++; } } iterator->Release(); g_print ("%d devices\n", n_devices); } #endif