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decklinkvideosink: Add support for GstVideoTimeCode

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The timecode will be fetched from the video buffer and outputted on the
decklink video sink.

https://bugzilla.gnome.org/show_bug.cgi?id=766419
This commit is contained in:
Vivia Nikolaidou 2016-05-15 17:25:44 +03:00 committed by Sebastian Dröge
parent 8faa36e105
commit de1f42a284
2 changed files with 68 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

70
sys/decklink/gstdecklinkvideosink.cpp
View file

@ -119,7 +119,8 @@ enum
PROP_0,
PROP_MODE,
PROP_DEVICE_NUMBER,
PROP_VIDEO_FORMAT
PROP_VIDEO_FORMAT,
PROP_TIMECODE_FORMAT
};
static void gst_decklink_video_sink_set_property (GObject * object,
@ -213,6 +214,14 @@ gst_decklink_video_sink_class_init (GstDecklinkVideoSinkClass * klass)
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_TIMECODE_FORMAT,
g_param_spec_enum ("timecode-format", "Timecode format",
"Timecode format type to use for playback",
GST_TYPE_DECKLINK_TIMECODE_FORMAT,
GST_DECKLINK_TIMECODE_FORMAT_RP188ANY,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
templ_caps = gst_decklink_mode_get_template_caps ();
templ_caps = gst_caps_make_writable (templ_caps);
/* For output we support any framerate and only really care about timestamps */
@ -235,6 +244,8 @@ gst_decklink_video_sink_init (GstDecklinkVideoSink * self)
self->mode = GST_DECKLINK_MODE_NTSC;
self->device_number = 0;
self->video_format = GST_DECKLINK_VIDEO_FORMAT_8BIT_YUV;
/* VITC is legacy, we should expect RP188 in modern use cases */
self->timecode_format = bmdTimecodeRP188Any;
gst_base_sink_set_max_lateness (GST_BASE_SINK_CAST (self), 20 * GST_MSECOND);
gst_base_sink_set_qos_enabled (GST_BASE_SINK_CAST (self), TRUE);
@ -268,6 +279,11 @@ gst_decklink_video_sink_set_property (GObject * object, guint property_id,
break;
}
break;
case PROP_TIMECODE_FORMAT:
self->timecode_format =
gst_decklink_timecode_format_from_enum ((GstDecklinkTimecodeFormat)
g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
@ -290,6 +306,10 @@ gst_decklink_video_sink_get_property (GObject * object, guint property_id,
case PROP_VIDEO_FORMAT:
g_value_set_enum (value, self->video_format);
break;
case PROP_TIMECODE_FORMAT:
g_value_set_enum (value,
gst_decklink_timecode_format_to_enum (self->timecode_format));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
@ -310,6 +330,7 @@ gst_decklink_video_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
const GstDecklinkMode *mode;
HRESULT ret;
BMDVideoOutputFlags flags;
GST_DEBUG_OBJECT (self, "Setting caps %" GST_PTR_FORMAT, caps);
@ -341,8 +362,21 @@ gst_decklink_video_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
g_assert (mode != NULL);
};
ret = self->output->output->EnableVideoOutput (mode->mode,
bmdVideoOutputFlagDefault);
/* The timecode_format itself is used when we embed the actual timecode data
* into the frame. Now we only need to know which of the two standards the
* timecode format will adhere to: VITC or RP188, and send the appropriate
* flag to EnableVideoOutput. The exact format is specified later.
*
* Note that this flag will have no effect in practice if the video stream
* does not contain timecode metadata.
*/
if (self->timecode_format == GST_DECKLINK_TIMECODE_FORMAT_VITC ||
self->timecode_format == GST_DECKLINK_TIMECODE_FORMAT_VITCFIELD2)
flags = bmdVideoOutputVITC;
else
flags = bmdVideoOutputRP188;
ret = self->output->output->EnableVideoOutput (mode->mode, flags);
if (ret != S_OK) {
GST_WARNING_OBJECT (self, "Failed to enable video output");
return FALSE;
@ -503,6 +537,7 @@ gst_decklink_video_sink_prepare (GstBaseSink * bsink, GstBuffer * buffer)
GstDecklinkVideoFormat caps_format;
BMDPixelFormat format;
gint bpp;
GstVideoTimeCodeMeta *tc_meta;
GST_DEBUG_OBJECT (self, "Preparing buffer %p", buffer);
@ -575,6 +610,35 @@ gst_decklink_video_sink_prepare (GstBaseSink * bsink, GstBuffer * buffer)
}
gst_video_frame_unmap (&vframe);
tc_meta = gst_buffer_get_video_time_code_meta (buffer);
if (tc_meta) {
BMDTimecodeFlags bflags = (BMDTimecodeFlags) 0;
gchar *tc_str;
if (((GstVideoTimeCodeFlags) (tc_meta->tc.
config.flags)) & GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME)
bflags = (BMDTimecodeFlags) (bflags | bmdTimecodeIsDropFrame);
else
bflags = (BMDTimecodeFlags) (bflags | bmdTimecodeFlagDefault);
if (tc_meta->tc.field_count == 2)
bflags = (BMDTimecodeFlags) (bflags | bmdTimecodeFieldMark);
tc_str = gst_video_time_code_to_string (&tc_meta->tc);
ret = frame->SetTimecodeFromComponents (self->timecode_format,
(uint8_t) tc_meta->tc.hours,
(uint8_t) tc_meta->tc.minutes,
(uint8_t) tc_meta->tc.seconds, (uint8_t) tc_meta->tc.frames, bflags);
if (ret != S_OK) {
GST_ERROR_OBJECT (self,
"Failed to set timecode %s to video frame: 0x%08x", tc_str, ret);
flow_ret = GST_FLOW_ERROR;
g_free (tc_str);
goto out;
}
GST_DEBUG_OBJECT (self, "Set frame timecode to %s", tc_str);
g_free (tc_str);
}
convert_to_internal_clock (self, &running_time, &running_time_duration);
GST_LOG_OBJECT (self, "Scheduling video frame %p at %" GST_TIME_FORMAT

1
sys/decklink/gstdecklinkvideosink.h
View file

@ -52,6 +52,7 @@ struct _GstDecklinkVideoSink
GstDecklinkModeEnum mode;
gint device_number;
GstDecklinkVideoFormat video_format;
BMDTimecodeFormat timecode_format;
GstVideoInfo info;