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gstreamer/sys/decklink/gstdecklinkvideosrc.cpp
Sebastian Dröge bf9ecd65cf decklinkvideosrc: Don't report that we have signal until we know for sure 
Previously we would've reported that there is signal unless we know for
sure that we don't have signal. For example signal would've been
reported before the device is even opened.

Now keep track whether the signal state is unknown or not and report no
signal if we don't know yet. As before, only send an INFO message about
signal recovery if we actually had a signal loss before.
2019-07-15 12:06:25 +03:00

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/* GStreamer
* Copyright (C) 2011 David Schleef <ds@entropywave.com>
* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.com>
* Copyright (C) 2015 Florian Langlois <florian.langlois@fr.thalesgroup.com>
*
* 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-decklinkvideosrc
* @short_description: Inputs Video from a BlackMagic DeckLink Device
*
* Capture Video from a BlackMagic DeckLink Device.
*
* ## Sample pipeline
* |[
* gst-launch-1.0 \
* decklinkvideosrc device-number=0 connection=sdi mode=1080p25 ! \
* autovideosink
* ]|
* Capturing 1080p25 video from the SDI-In of Card 0. Devices are numbered
* starting with 0.
*
* # Duplex-Mode:
* Certain DechLink Cards like the Duo2 or the Quad2 contain two or four
* independant SDI units with two connectors each. These units can operate either
* in half- or in full-duplex mode.
*
* The Duplex-Mode of a Card can be configured using the `duplex-mode`-Property.
* Cards that to not support Duplex-Modes are not influenced by the property.
*
* ## Half-Duplex-Mode (default):
* By default decklinkvideosrc will configure them into half-duplex mode, so that
* each connector acts as if it were an independant DeckLink Card which can either
* be used as an Input or as an Output. In this mode the Duo2 can be used as as 4 SDI
* In-/Outputs and the Quad2 as 8 SDI In-/Outputs.
*
* |[
* gst-launch-1.0 \
* decklinkvideosrc device-number=0 mode=1080p25 ! c. \
* decklinkvideosrc device-number=1 mode=1080p25 ! c. \
* decklinkvideosrc device-number=2 mode=1080p25 ! c. \
* decklinkvideosrc device-number=3 mode=1080p25 ! c. \
* compositor name=c \
* sink_0::xpos=0 sink_0::ypos=0 sink_0::width=960 sink_0::height=540 \
* sink_1::xpos=960 sink_1::ypos=0 sink_1::width=960 sink_1::height=540 \
* sink_2::xpos=0 sink_2::ypos=540 sink_2::width=960 sink_2::height=540 \
* sink_3::xpos=960 sink_3::ypos=540 sink_3::width=960 sink_3::height=540 ! \
* video/x-raw,width=1920,height=1080 ! \
* autovideosink
* ]|
* Capture 1080p25 from the first 4 units in the System (ie. the 4 Connectors of
* a Duo2 Card) and compose them into a 2x2 grid.
*
* |[
* gst-launch-1.0 \
* videotestsrc foreground-color=0x0000ff00 ! decklinkvideosink device-number=0 mode=1080p25 \
* decklinkvideosrc device-number=1 mode=1080p25 ! autovideosink \
* decklinkvideosrc device-number=2 mode=1080p25 ! autovideosink \
* videotestsrc foreground-color=0x00ff0000 ! decklinkvideosink device-number=3 mode=1080p25
* ]|
* Capture 1080p25 from the second and third unit in the System,
* Playout a Test-Screen with colored Snow on the first and fourth unit
* (ie. the Connectors 1-4 of a Duo2 unit).
*
* ## Device-Number-Mapping in Half-Duplex-Mode
* The device-number to connector-mapping in half-duplex-mode is as follows for the Duo2
* - `device-number=0` SDI1
* - `device-number=1` SDI3
* - `device-number=2` SDI2
* - `device-number=3` SDI4
*
* And for the Quad2
* - `device-number=0` SDI1
* - `device-number=1` SDI3
* - `device-number=2` SDI5
* - `device-number=3` SDI7
* - `device-number=4` SDI2
* - `device-number=5` SDI4
* - `device-number=6` SDI6
* - `device-number=7` SDI8
*
* ## Full-Duplex-Mode:
* When operating in full-duplex mode, two connectors of a unit are combined to
* a single device, performing extra processing with the second connection.
*
* This mode is most useful for Playout. See @decklinkvideosink.
* For Capturing the options are as follows:
*
* When capturing from a duplex-unit, the secondary port outputs the captured image
* unchanged.
* |[
* gst-launch-1.0 \
* decklinkvideosrc device-number=0 mode=1080p25 duplex-mode=full ! \
* autovideosink
* ]|
*
* When simultaneously capturing and playing out onto the same device, the
* secondary port outputs the played out video. Note, that this can also be
* achieved using half-duplex mode.
* |[
* gst-launch-1.0 \
* decklinkvideosrc device-number=0 mode=1080p25 duplex-mode=full ! \
* videoflip video-direction=vert ! \
* decklinkvideosink device-number=0 mode=1080p25 duplex-mode=full
* ]|
* Capturing Video on the primary port of device 0, output flipped version of the
* video on secondary port of the same device.
*
* ## Device-Number-Mapping in Full-Duplex-Mode
* The device-number to connector-mapping in full-duplex-mode is as follows for the Duo2
* - `device-number=0` SDI1 primary, SDI2 secondary
* - `device-number=1` SDI3 primaty, SDI4 secondary
*
* And for the Quad2
* - `device-number=0` SDI1 primary, SDI2 secondary
* - `device-number=1` SDI3 primaty, SDI4 secondary
* - `device-number=2` SDI5 primary, SDI6 secondary
* - `device-number=3` SDI7 primary, SDI8 secondary
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdecklinkvideosrc.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_decklink_video_src_debug);
#define GST_CAT_DEFAULT gst_decklink_video_src_debug
#define DEFAULT_MODE (GST_DECKLINK_MODE_AUTO)
#define DEFAULT_CONNECTION (GST_DECKLINK_CONNECTION_AUTO)
#define DEFAULT_BUFFER_SIZE (5)
#define DEFAULT_OUTPUT_STREAM_TIME (FALSE)
#define DEFAULT_SKIP_FIRST_TIME (0)
#define DEFAULT_DROP_NO_SIGNAL_FRAMES (FALSE)
#define DEFAULT_OUTPUT_CC (FALSE)
#define DEFAULT_OUTPUT_AFD_BAR (FALSE)
#ifndef ABSDIFF
#define ABSDIFF(x, y) ( (x) > (y) ? ((x) - (y)) : ((y) - (x)) )
#endif
enum
{
PROP_0,
PROP_MODE,
PROP_CONNECTION,
PROP_DEVICE_NUMBER,
PROP_BUFFER_SIZE,
PROP_VIDEO_FORMAT,
PROP_DUPLEX_MODE,
PROP_TIMECODE_FORMAT,
PROP_OUTPUT_STREAM_TIME,
PROP_SKIP_FIRST_TIME,
PROP_DROP_NO_SIGNAL_FRAMES,
PROP_SIGNAL,
PROP_HW_SERIAL_NUMBER,
PROP_OUTPUT_CC,
PROP_OUTPUT_AFD_BAR,
};
typedef struct
{
IDeckLinkVideoInputFrame *frame;
GstClockTime timestamp, duration;
GstClockTime stream_timestamp;
GstClockTime stream_duration;
GstClockTime hardware_timestamp;
GstClockTime hardware_duration;
GstDecklinkModeEnum mode;
BMDPixelFormat format;
GstVideoTimeCode *tc;
gboolean no_signal;
} CaptureFrame;
static void
capture_frame_clear (CaptureFrame * frame)
{
if (frame->frame)
frame->frame->Release ();
if (frame->tc)
gst_video_time_code_free (frame->tc);
memset (frame, 0, sizeof (*frame));
}
typedef struct
{
IDeckLinkVideoInputFrame *frame;
IDeckLinkInput *input;
} VideoFrame;
static void
video_frame_free (void *data)
{
VideoFrame *frame = (VideoFrame *) data;
frame->frame->Release ();
frame->input->Release ();
g_free (frame);
}
static void gst_decklink_video_src_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_decklink_video_src_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_decklink_video_src_finalize (GObject * object);
static GstStateChangeReturn
gst_decklink_video_src_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_decklink_video_src_set_caps (GstBaseSrc * bsrc,
GstCaps * caps);
static GstCaps *gst_decklink_video_src_get_caps (GstBaseSrc * bsrc,
GstCaps * filter);
static gboolean gst_decklink_video_src_query (GstBaseSrc * bsrc,
GstQuery * query);
static gboolean gst_decklink_video_src_unlock (GstBaseSrc * bsrc);
static gboolean gst_decklink_video_src_unlock_stop (GstBaseSrc * bsrc);
static GstFlowReturn gst_decklink_video_src_create (GstPushSrc * psrc,
GstBuffer ** buffer);
static gboolean gst_decklink_video_src_open (GstDecklinkVideoSrc * self);
static gboolean gst_decklink_video_src_close (GstDecklinkVideoSrc * self);
static gboolean gst_decklink_video_src_stop (GstDecklinkVideoSrc * self);
static void gst_decklink_video_src_start_streams (GstElement * element);
#define parent_class gst_decklink_video_src_parent_class
G_DEFINE_TYPE (GstDecklinkVideoSrc, gst_decklink_video_src, GST_TYPE_PUSH_SRC);
static void
gst_decklink_video_src_class_init (GstDecklinkVideoSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstBaseSrcClass *basesrc_class = GST_BASE_SRC_CLASS (klass);
GstPushSrcClass *pushsrc_class = GST_PUSH_SRC_CLASS (klass);
GstCaps *templ_caps;
gobject_class->set_property = gst_decklink_video_src_set_property;
gobject_class->get_property = gst_decklink_video_src_get_property;
gobject_class->finalize = gst_decklink_video_src_finalize;
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_decklink_video_src_change_state);
basesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_decklink_video_src_get_caps);
basesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_decklink_video_src_set_caps);
basesrc_class->query = GST_DEBUG_FUNCPTR (gst_decklink_video_src_query);
basesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_decklink_video_src_unlock);
basesrc_class->unlock_stop =
GST_DEBUG_FUNCPTR (gst_decklink_video_src_unlock_stop);
pushsrc_class->create = GST_DEBUG_FUNCPTR (gst_decklink_video_src_create);
g_object_class_install_property (gobject_class, PROP_MODE,
g_param_spec_enum ("mode", "Playback Mode",
"Video Mode to use for playback",
GST_TYPE_DECKLINK_MODE, DEFAULT_MODE,
(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, DEFAULT_CONNECTION,
(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",
"Output device instance to use", 0, G_MAXINT, 0,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_BUFFER_SIZE,
g_param_spec_uint ("buffer-size", "Buffer Size",
"Size of internal buffer in number of video frames", 1,
G_MAXINT, DEFAULT_BUFFER_SIZE,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_VIDEO_FORMAT,
g_param_spec_enum ("video-format", "Video format",
"Video format type to use for input (Only use auto for mode=auto)",
GST_TYPE_DECKLINK_VIDEO_FORMAT, GST_DECKLINK_VIDEO_FORMAT_AUTO,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_DUPLEX_MODE,
g_param_spec_enum ("duplex-mode", "Duplex mode",
"Certain DeckLink devices such as the DeckLink Quad 2 and the "
"DeckLink Duo 2 support configuration of the duplex mode of "
"individual sub-devices."
"A sub-device configured as full-duplex will use two connectors, "
"which allows simultaneous capture and playback, internal keying, "
"and fill & key scenarios."
"A half-duplex sub-device will use a single connector as an "
"individual capture or playback channel.",
GST_TYPE_DECKLINK_DUPLEX_MODE, GST_DECKLINK_DUPLEX_MODE_HALF,
(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 input",
GST_TYPE_DECKLINK_TIMECODE_FORMAT,
GST_DECKLINK_TIMECODE_FORMAT_RP188ANY,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_OUTPUT_STREAM_TIME,
g_param_spec_boolean ("output-stream-time", "Output Stream Time",
"Output stream time directly instead of translating to pipeline clock",
DEFAULT_OUTPUT_STREAM_TIME,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_SKIP_FIRST_TIME,
g_param_spec_uint64 ("skip-first-time", "Skip First Time",
"Skip that much time of initial frames after starting", 0,
G_MAXUINT64, DEFAULT_SKIP_FIRST_TIME,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_DROP_NO_SIGNAL_FRAMES,
g_param_spec_boolean ("drop-no-signal-frames", "Drop No Signal Frames",
"Drop frames that are marked as having no input signal",
DEFAULT_DROP_NO_SIGNAL_FRAMES,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_SIGNAL,
g_param_spec_boolean ("signal", "Input signal available",
"True if there is a valid input signal available",
FALSE, (GParamFlags) (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_HW_SERIAL_NUMBER,
g_param_spec_string ("hw-serial-number", "Hardware serial number",
"The serial number (hardware ID) of the Decklink card",
NULL, (GParamFlags) (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_OUTPUT_CC,
g_param_spec_boolean ("output-cc", "Output Closed Caption",
"Extract and output CC as GstMeta (if present)",
DEFAULT_OUTPUT_CC,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_OUTPUT_AFD_BAR,
g_param_spec_boolean ("output-afd-bar", "Output AFD/Bar data",
"Extract and output AFD/Bar as GstMeta (if present)",
DEFAULT_OUTPUT_AFD_BAR,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
templ_caps = gst_decklink_mode_get_template_caps (TRUE);
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, templ_caps));
gst_caps_unref (templ_caps);
gst_element_class_set_static_metadata (element_class, "Decklink Video Source",
"Video/Source/Hardware", "Decklink Source",
"David Schleef <ds@entropywave.com>, "
"Sebastian Dröge <sebastian@centricular.com>");
GST_DEBUG_CATEGORY_INIT (gst_decklink_video_src_debug, "decklinkvideosrc",
0, "debug category for decklinkvideosrc element");
}
static void
gst_decklink_video_src_init (GstDecklinkVideoSrc * self)
{
self->mode = DEFAULT_MODE;
self->caps_mode = GST_DECKLINK_MODE_AUTO;
self->caps_format = bmdFormat8BitYUV;
self->connection = DEFAULT_CONNECTION;
self->device_number = 0;
self->buffer_size = DEFAULT_BUFFER_SIZE;
self->video_format = GST_DECKLINK_VIDEO_FORMAT_AUTO;
self->duplex_mode = bmdDuplexModeHalf;
self->timecode_format = bmdTimecodeRP188Any;
self->signal_state = SIGNAL_STATE_UNKNOWN;
self->output_stream_time = DEFAULT_OUTPUT_STREAM_TIME;
self->skip_first_time = DEFAULT_SKIP_FIRST_TIME;
self->drop_no_signal_frames = DEFAULT_DROP_NO_SIGNAL_FRAMES;
self->output_cc = DEFAULT_OUTPUT_CC;
self->output_afd_bar = DEFAULT_OUTPUT_AFD_BAR;
self->window_size = 64;
self->times = g_new (GstClockTime, 4 * self->window_size);
self->times_temp = self->times + 2 * self->window_size;
self->window_fill = 0;
self->window_skip = 1;
self->window_skip_count = 0;
gst_base_src_set_live (GST_BASE_SRC (self), TRUE);
gst_base_src_set_format (GST_BASE_SRC (self), GST_FORMAT_TIME);
g_mutex_init (&self->lock);
g_cond_init (&self->cond);
self->current_frames =
gst_queue_array_new_for_struct (sizeof (CaptureFrame),
DEFAULT_BUFFER_SIZE);
}
void
gst_decklink_video_src_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (object);
switch (property_id) {
case PROP_MODE:
self->mode = (GstDecklinkModeEnum) g_value_get_enum (value);
/* setting the default value for caps_mode here: if mode==auto then we
* configure caps_mode from the caps, if mode!=auto we set caps_mode to
* the same value as the mode. so self->caps_mode is essentially
* self->mode with mode=auto filtered into whatever we got from the
* negotiation */
if (self->mode != GST_DECKLINK_MODE_AUTO)
self->caps_mode = self->mode;
break;
case PROP_CONNECTION:
self->connection = (GstDecklinkConnectionEnum) g_value_get_enum (value);
break;
case PROP_DEVICE_NUMBER:
self->device_number = g_value_get_int (value);
break;
case PROP_BUFFER_SIZE:
self->buffer_size = g_value_get_uint (value);
break;
case PROP_VIDEO_FORMAT:
self->video_format = (GstDecklinkVideoFormat) g_value_get_enum (value);
switch (self->video_format) {
case GST_DECKLINK_VIDEO_FORMAT_8BIT_YUV:
case GST_DECKLINK_VIDEO_FORMAT_10BIT_YUV:
case GST_DECKLINK_VIDEO_FORMAT_8BIT_ARGB:
case GST_DECKLINK_VIDEO_FORMAT_8BIT_BGRA:
self->caps_format =
gst_decklink_pixel_format_from_type (self->video_format);
case GST_DECKLINK_VIDEO_FORMAT_AUTO:
break;
default:
GST_ELEMENT_WARNING (GST_ELEMENT (self), CORE, NOT_IMPLEMENTED,
("Format %d not supported", self->video_format), (NULL));
break;
}
break;
case PROP_DUPLEX_MODE:
self->duplex_mode =
gst_decklink_duplex_mode_from_enum ((GstDecklinkDuplexMode)
g_value_get_enum (value));
break;
case PROP_TIMECODE_FORMAT:
self->timecode_format =
gst_decklink_timecode_format_from_enum ((GstDecklinkTimecodeFormat)
g_value_get_enum (value));
break;
case PROP_OUTPUT_STREAM_TIME:
self->output_stream_time = g_value_get_boolean (value);
break;
case PROP_SKIP_FIRST_TIME:
self->skip_first_time = g_value_get_uint64 (value);
break;
case PROP_DROP_NO_SIGNAL_FRAMES:
self->drop_no_signal_frames = g_value_get_boolean (value);
break;
case PROP_OUTPUT_CC:
self->output_cc = g_value_get_boolean (value);
break;
case PROP_OUTPUT_AFD_BAR:
self->output_afd_bar = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_video_src_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (object);
switch (property_id) {
case PROP_MODE:
g_value_set_enum (value, self->mode);
break;
case PROP_CONNECTION:
g_value_set_enum (value, self->connection);
break;
case PROP_DEVICE_NUMBER:
g_value_set_int (value, self->device_number);
break;
case PROP_BUFFER_SIZE:
g_value_set_uint (value, self->buffer_size);
break;
case PROP_VIDEO_FORMAT:
g_value_set_enum (value, self->video_format);
break;
case PROP_DUPLEX_MODE:
g_value_set_enum (value,
gst_decklink_duplex_mode_to_enum (self->duplex_mode));
break;
case PROP_TIMECODE_FORMAT:
g_value_set_enum (value,
gst_decklink_timecode_format_to_enum (self->timecode_format));
break;
case PROP_OUTPUT_STREAM_TIME:
g_value_set_boolean (value, self->output_stream_time);
break;
case PROP_SKIP_FIRST_TIME:
g_value_set_uint64 (value, self->skip_first_time);
break;
case PROP_DROP_NO_SIGNAL_FRAMES:
g_value_set_boolean (value, self->drop_no_signal_frames);
break;
case PROP_SIGNAL:
g_value_set_boolean (value, self->signal_state == SIGNAL_STATE_AVAILABLE);
break;
case PROP_HW_SERIAL_NUMBER:
if (self->input)
g_value_set_string (value, self->input->hw_serial_number);
else
g_value_set_string (value, NULL);
break;
case PROP_OUTPUT_CC:
g_value_set_boolean (value, self->output_cc);
break;
case PROP_OUTPUT_AFD_BAR:
g_value_set_boolean (value, self->output_afd_bar);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_video_src_finalize (GObject * object)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (object);
g_free (self->times);
self->times = NULL;
g_mutex_clear (&self->lock);
g_cond_clear (&self->cond);
if (self->current_frames) {
while (gst_queue_array_get_length (self->current_frames) > 0) {
CaptureFrame *tmp = (CaptureFrame *)
gst_queue_array_pop_head_struct (self->current_frames);
capture_frame_clear (tmp);
}
gst_queue_array_free (self->current_frames);
self->current_frames = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_decklink_video_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
GstCaps *current_caps;
const GstDecklinkMode *mode;
BMDVideoInputFlags flags;
HRESULT ret;
BMDPixelFormat format;
GST_DEBUG_OBJECT (self, "Setting caps %" GST_PTR_FORMAT, caps);
if ((current_caps = gst_pad_get_current_caps (GST_BASE_SRC_PAD (bsrc)))) {
GST_DEBUG_OBJECT (self, "Pad already has caps %" GST_PTR_FORMAT, caps);
if (!gst_caps_is_equal (caps, current_caps)) {
GST_DEBUG_OBJECT (self, "New caps, reconfiguring");
gst_caps_unref (current_caps);
if (self->mode == GST_DECKLINK_MODE_AUTO) {
return TRUE;
} else {
return FALSE;
}
} else {
gst_caps_unref (current_caps);
return TRUE;
}
}
if (!gst_video_info_from_caps (&self->info, caps))
return FALSE;
if (self->input->config && self->connection != GST_DECKLINK_CONNECTION_AUTO) {
ret = self->input->config->SetInt (bmdDeckLinkConfigVideoInputConnection,
gst_decklink_get_connection (self->connection));
if (ret != S_OK) {
GST_ERROR_OBJECT (self,
"Failed to set configuration (input source): 0x%08lx",
(unsigned long) ret);
return FALSE;
}
if (self->connection == GST_DECKLINK_CONNECTION_COMPOSITE) {
ret = self->input->config->SetInt (bmdDeckLinkConfigAnalogVideoInputFlags,
bmdAnalogVideoFlagCompositeSetup75);
if (ret != S_OK) {
GST_ERROR_OBJECT (self,
"Failed to set configuration (composite setup): 0x%08lx",
(unsigned long) ret);
return FALSE;
}
}
}
flags = bmdVideoInputFlagDefault;
if (self->mode == GST_DECKLINK_MODE_AUTO) {
bool autoDetection = false;
if (self->input->attributes) {
ret =
self->input->
attributes->GetFlag (BMDDeckLinkSupportsInputFormatDetection,
&autoDetection);
if (ret != S_OK) {
GST_ERROR_OBJECT (self,
"Failed to get attribute (autodetection): 0x%08lx",
(unsigned long) ret);
return FALSE;
}
if (autoDetection)
flags |= bmdVideoInputEnableFormatDetection;
}
if (!autoDetection) {
GST_ERROR_OBJECT (self, "Failed to activate auto-detection");
return FALSE;
}
}
mode = gst_decklink_get_mode (self->mode);
g_assert (mode != NULL);
format = self->caps_format;
ret = self->input->input->EnableVideoInput (mode->mode, format, flags);
if (ret != S_OK) {
GST_WARNING_OBJECT (self, "Failed to enable video input: 0x%08lx",
(unsigned long) ret);
return FALSE;
}
g_mutex_lock (&self->input->lock);
self->input->mode = mode;
self->input->video_enabled = TRUE;
if (self->input->start_streams)
self->input->start_streams (self->input->videosrc);
g_mutex_unlock (&self->input->lock);
return TRUE;
}
static GstCaps *
gst_decklink_video_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
GstCaps *mode_caps, *caps;
BMDPixelFormat format;
GstDecklinkModeEnum mode;
g_mutex_lock (&self->lock);
mode = self->caps_mode;
format = self->caps_format;
g_mutex_unlock (&self->lock);
mode_caps = gst_decklink_mode_get_caps (mode, format, TRUE);
if (filter) {
caps =
gst_caps_intersect_full (filter, mode_caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (mode_caps);
} else {
caps = mode_caps;
}
return caps;
}
static void
gst_decklink_video_src_update_time_mapping (GstDecklinkVideoSrc * self,
GstClockTime capture_time, GstClockTime stream_time)
{
if (self->window_skip_count == 0) {
GstClockTime num, den, b, xbase;
gdouble r_squared;
self->times[2 * self->window_fill] = stream_time;
self->times[2 * self->window_fill + 1] = capture_time;
self->window_fill++;
self->window_skip_count++;
if (self->window_skip_count >= self->window_skip)
self->window_skip_count = 0;
if (self->window_fill >= self->window_size) {
guint fps =
((gdouble) self->info.fps_n + self->info.fps_d -
1) / ((gdouble) self->info.fps_d);
/* Start by updating first every frame, once full every second frame,
* etc. until we update once every 4 seconds */
if (self->window_skip < 4 * fps)
self->window_skip *= 2;
if (self->window_skip >= 4 * fps)
self->window_skip = 4 * fps;
self->window_fill = 0;
self->window_filled = TRUE;
}
/* First sample ever, create some basic mapping to start */
if (!self->window_filled && self->window_fill == 1) {
self->current_time_mapping.xbase = stream_time;
self->current_time_mapping.b = capture_time;
self->current_time_mapping.num = 1;
self->current_time_mapping.den = 1;
self->next_time_mapping_pending = FALSE;
}
/* Only bother calculating anything here once we had enough measurements,
* i.e. let's take the window size as a start */
if (self->window_filled &&
gst_calculate_linear_regression (self->times, self->times_temp,
self->window_size, &num, &den, &b, &xbase, &r_squared)) {
GST_DEBUG_OBJECT (self,
"Calculated new time mapping: pipeline time = %lf * (stream time - %"
G_GUINT64_FORMAT ") + %" G_GUINT64_FORMAT " (%lf)",
((gdouble) num) / ((gdouble) den), xbase, b, r_squared);
self->next_time_mapping.xbase = xbase;
self->next_time_mapping.b = b;
self->next_time_mapping.num = num;
self->next_time_mapping.den = den;
self->next_time_mapping_pending = TRUE;
}
} else {
self->window_skip_count++;
if (self->window_skip_count >= self->window_skip)
self->window_skip_count = 0;
}
if (self->next_time_mapping_pending) {
GstClockTime expected, new_calculated, diff, max_diff;
expected =
gst_clock_adjust_with_calibration (NULL, stream_time,
self->current_time_mapping.xbase, self->current_time_mapping.b,
self->current_time_mapping.num, self->current_time_mapping.den);
new_calculated =
gst_clock_adjust_with_calibration (NULL, stream_time,
self->next_time_mapping.xbase, self->next_time_mapping.b,
self->next_time_mapping.num, self->next_time_mapping.den);
if (new_calculated > expected)
diff = new_calculated - expected;
else
diff = expected - new_calculated;
/* At most 5% frame duration change per update */
max_diff =
gst_util_uint64_scale (GST_SECOND / 20, self->info.fps_d,
self->info.fps_n);
GST_DEBUG_OBJECT (self,
"New time mapping causes difference of %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff));
GST_DEBUG_OBJECT (self, "Maximum allowed per frame %" GST_TIME_FORMAT,
GST_TIME_ARGS (max_diff));
if (diff > max_diff) {
/* adjust so that we move that much closer */
if (new_calculated > expected) {
self->current_time_mapping.b = expected + max_diff;
self->current_time_mapping.xbase = stream_time;
} else {
self->current_time_mapping.b = expected - max_diff;
self->current_time_mapping.xbase = stream_time;
}
} else {
self->current_time_mapping.xbase = self->next_time_mapping.xbase;
self->current_time_mapping.b = self->next_time_mapping.b;
self->current_time_mapping.num = self->next_time_mapping.num;
self->current_time_mapping.den = self->next_time_mapping.den;
self->next_time_mapping_pending = FALSE;
}
}
}
static void
gst_decklink_video_src_got_frame (GstElement * element,
IDeckLinkVideoInputFrame * frame, GstDecklinkModeEnum mode,
GstClockTime capture_time, GstClockTime stream_time,
GstClockTime stream_duration, GstClockTime hardware_time,
GstClockTime hardware_duration, IDeckLinkTimecode * dtc, gboolean no_signal)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);
GstClockTime timestamp, duration;
GST_LOG_OBJECT (self,
"Got video frame at %" GST_TIME_FORMAT " / %" GST_TIME_FORMAT " (%"
GST_TIME_FORMAT "), no signal: %d", GST_TIME_ARGS (capture_time),
GST_TIME_ARGS (stream_time), GST_TIME_ARGS (stream_duration), no_signal);
g_mutex_lock (&self->lock);
if (self->first_time == GST_CLOCK_TIME_NONE)
self->first_time = stream_time;
if (self->skip_first_time > 0
&& stream_time - self->first_time < self->skip_first_time) {
g_mutex_unlock (&self->lock);
GST_DEBUG_OBJECT (self,
"Skipping frame as requested: %" GST_TIME_FORMAT " < %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream_time),
GST_TIME_ARGS (self->skip_first_time + self->first_time));
return;
}
if (self->drop_no_signal_frames && no_signal) {
CaptureFrame f;
memset (&f, 0, sizeof (f));
/* Notify the streaming thread about the signal loss */
gst_queue_array_push_tail_struct (self->current_frames, &f);
g_cond_signal (&self->cond);
g_mutex_unlock (&self->lock);
return;
}
gst_decklink_video_src_update_time_mapping (self, capture_time, stream_time);
if (self->output_stream_time) {
timestamp = stream_time;
duration = stream_duration;
} else {
timestamp =
gst_clock_adjust_with_calibration (NULL, stream_time,
self->current_time_mapping.xbase, self->current_time_mapping.b,
self->current_time_mapping.num, self->current_time_mapping.den);
duration =
gst_util_uint64_scale (stream_duration, self->current_time_mapping.num,
self->current_time_mapping.den);
}
GST_LOG_OBJECT (self,
"Converted times to %" GST_TIME_FORMAT " (%"
GST_TIME_FORMAT ")", GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
if (!self->flushing) {
CaptureFrame f;
const GstDecklinkMode *bmode;
GstVideoTimeCodeFlags flags = GST_VIDEO_TIME_CODE_FLAGS_NONE;
guint field_count = 0;
guint skipped_frames = 0;
GstClockTime from_timestamp = GST_CLOCK_TIME_NONE;
GstClockTime to_timestamp = GST_CLOCK_TIME_NONE;
while (gst_queue_array_get_length (self->current_frames) >=
self->buffer_size) {
CaptureFrame *tmp = (CaptureFrame *)
gst_queue_array_pop_head_struct (self->current_frames);
if (tmp->frame) {
if (skipped_frames == 0)
from_timestamp = tmp->timestamp;
skipped_frames++;
to_timestamp = tmp->timestamp;
}
capture_frame_clear (tmp);
}
if (skipped_frames > 0)
GST_WARNING_OBJECT (self,
"Dropped %u old frames from %" GST_TIME_FORMAT " to %"
GST_TIME_FORMAT, skipped_frames, GST_TIME_ARGS (from_timestamp),
GST_TIME_ARGS (to_timestamp));
memset (&f, 0, sizeof (f));
f.frame = frame;
f.timestamp = timestamp;
f.duration = duration;
f.stream_timestamp = stream_time;
f.stream_duration = stream_duration;
f.hardware_timestamp = hardware_time;
f.hardware_duration = hardware_duration;
f.mode = mode;
f.format = frame->GetPixelFormat ();
f.no_signal = no_signal;
if (dtc != NULL) {
uint8_t hours, minutes, seconds, frames;
HRESULT res;
res = dtc->GetComponents (&hours, &minutes, &seconds, &frames);
if (res != S_OK) {
GST_ERROR ("Could not get components for timecode %p: 0x%08lx", dtc,
(unsigned long) res);
f.tc = NULL;
} else {
GST_DEBUG_OBJECT (self, "Got timecode %02d:%02d:%02d:%02d",
hours, minutes, seconds, frames);
bmode = gst_decklink_get_mode (mode);
if (bmode->interlaced)
flags =
(GstVideoTimeCodeFlags) (flags |
GST_VIDEO_TIME_CODE_FLAGS_INTERLACED);
if (bmode->fps_d == 1001) {
if (bmode->fps_n == 30000 || bmode->fps_n == 60000) {
/* Some occurrences have been spotted where the driver mistakenly
* fails to set the drop-frame flag for drop-frame timecodes.
* Assume always drop-frame for 29.97 and 59.94 FPS */
flags =
(GstVideoTimeCodeFlags) (flags |
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME);
} else {
/* Drop-frame isn't defined for any other framerates (e.g. 23.976)
* */
flags =
(GstVideoTimeCodeFlags) (flags &
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME);
}
}
f.tc =
gst_video_time_code_new (bmode->fps_n, bmode->fps_d, NULL, flags,
hours, minutes, seconds, frames, field_count);
}
dtc->Release ();
} else {
f.tc = NULL;
}
frame->AddRef ();
gst_queue_array_push_tail_struct (self->current_frames, &f);
g_cond_signal (&self->cond);
}
g_mutex_unlock (&self->lock);
}
static void
extract_vbi_line (GstDecklinkVideoSrc * self, GstBuffer ** buffer,
IDeckLinkVideoFrameAncillary * vanc_frame, guint field2_offset, guint line,
gboolean * found_cc_out, gboolean * found_afd_bar_out)
{
GstVideoAncillary gstanc;
const guint8 *vancdata;
gboolean found_cc = FALSE, found_afd_bar = FALSE;
if (vanc_frame->GetBufferForVerticalBlankingLine (field2_offset + line,
(void **) &vancdata) != S_OK)
return;
GST_DEBUG_OBJECT (self, "Checking for VBI data on field line %u (field %u)",
field2_offset + line, field2_offset ? 2 : 1);
gst_video_vbi_parser_add_line (self->vbiparser, vancdata);
/* Check if CC or AFD/Bar is on this line if we didn't find any on a
* previous line. Remember the line where we found them */
while (gst_video_vbi_parser_get_ancillary (self->vbiparser,
&gstanc) == GST_VIDEO_VBI_PARSER_RESULT_OK) {
switch (GST_VIDEO_ANCILLARY_DID16 (&gstanc)) {
case GST_VIDEO_ANCILLARY_DID16_S334_EIA_708:
if (*found_cc_out || !self->output_cc)
continue;
GST_DEBUG_OBJECT (self,
"Adding CEA-708 CDP meta to buffer for line %u",
field2_offset + line);
GST_MEMDUMP_OBJECT (self, "CDP", gstanc.data, gstanc.data_count);
gst_buffer_add_video_caption_meta (*buffer,
GST_VIDEO_CAPTION_TYPE_CEA708_CDP, gstanc.data, gstanc.data_count);
found_cc = TRUE;
if (field2_offset)
self->last_cc_vbi_line_field2 = line;
else
self->last_cc_vbi_line = line;
break;
case GST_VIDEO_ANCILLARY_DID16_S334_EIA_608:
if (*found_cc_out || !self->output_cc)
continue;
GST_DEBUG_OBJECT (self,
"Adding CEA-608 meta to buffer for line %u", field2_offset + line);
GST_MEMDUMP_OBJECT (self, "CEA608", gstanc.data, gstanc.data_count);
gst_buffer_add_video_caption_meta (*buffer,
GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A, gstanc.data,
gstanc.data_count);
found_cc = TRUE;
if (field2_offset)
self->last_cc_vbi_line_field2 = line;
else
self->last_cc_vbi_line = line;
break;
case GST_VIDEO_ANCILLARY_DID16_S2016_3_AFD_BAR:{
GstVideoAFDValue afd;
gboolean is_letterbox;
guint16 bar1, bar2;
if (*found_afd_bar_out || !self->output_afd_bar)
continue;
GST_DEBUG_OBJECT (self,
"Adding AFD/Bar meta to buffer for line %u", field2_offset + line);
GST_MEMDUMP_OBJECT (self, "AFD/Bar", gstanc.data, gstanc.data_count);
if (gstanc.data_count < 16) {
GST_WARNING_OBJECT (self, "AFD/Bar data too small");
continue;
}
afd = (GstVideoAFDValue) ((gstanc.data[0] >> 3) & 0xf);
is_letterbox = ((gstanc.data[3] >> 4) & 0x3) == 0;
bar1 = GST_READ_UINT16_BE (&gstanc.data[4]);
bar2 = GST_READ_UINT16_BE (&gstanc.data[6]);
gst_buffer_add_video_afd_meta (*buffer, field2_offset ? 1 : 0,
GST_VIDEO_AFD_SPEC_SMPTE_ST2016_1, afd);
gst_buffer_add_video_bar_meta (*buffer, field2_offset ? 1 : 0,
is_letterbox, bar1, bar2);
found_afd_bar = TRUE;
if (field2_offset)
self->last_afd_bar_vbi_line_field2 = line;
else
self->last_afd_bar_vbi_line = line;
break;
}
default:
/* otherwise continue looking */
continue;
}
}
if (found_cc)
*found_cc_out = TRUE;
if (found_afd_bar)
*found_afd_bar_out = TRUE;
}
static void
extract_vbi (GstDecklinkVideoSrc * self, GstBuffer ** buffer,
VideoFrame * vf, const GstDecklinkMode * mode)
{
IDeckLinkVideoFrameAncillary *vanc_frame = NULL;
gint line;
GstVideoFormat videoformat;
gboolean found_cc = FALSE, found_afd_bar = FALSE;
if (vf->frame->GetAncillaryData (&vanc_frame) != S_OK)
return;
videoformat =
gst_decklink_video_format_from_type (vanc_frame->GetPixelFormat ());
if (videoformat == GST_VIDEO_FORMAT_UNKNOWN) {
GST_DEBUG_OBJECT (self, "Unknown video format for Ancillary data");
vanc_frame->Release ();
return;
}
if (videoformat != self->anc_vformat && self->vbiparser) {
gst_video_vbi_parser_free (self->vbiparser);
self->vbiparser = NULL;
}
if (self->vbiparser == NULL) {
self->vbiparser = gst_video_vbi_parser_new (videoformat, mode->width);
self->anc_vformat = videoformat;
}
GST_DEBUG_OBJECT (self, "Checking for ancillary data in VBI");
/* First check last known lines, if any */
if (self->last_cc_vbi_line > 0) {
extract_vbi_line (self, buffer, vanc_frame, 0, self->last_cc_vbi_line,
&found_cc, &found_afd_bar);
}
if (self->last_afd_bar_vbi_line > 0
&& self->last_cc_vbi_line != self->last_afd_bar_vbi_line) {
extract_vbi_line (self, buffer, vanc_frame, 0, self->last_afd_bar_vbi_line,
&found_cc, &found_afd_bar);
}
if (!found_cc)
self->last_cc_vbi_line = -1;
if (!found_afd_bar)
self->last_afd_bar_vbi_line = -1;
if ((self->output_cc && !found_cc) || (self->output_afd_bar
&& !found_afd_bar)) {
/* Otherwise loop through the first 21 lines and hope to find the data */
/* FIXME: For the different formats the number of lines that can contain
* VANC are different */
for (line = 1; line < 22; line++) {
extract_vbi_line (self, buffer, vanc_frame, 0, line, &found_cc,
&found_afd_bar);
/* If we found everything we wanted to extract, stop here */
if ((!self->output_cc || found_cc) &&
(!self->output_afd_bar || found_afd_bar))
break;
}
}
/* Do the same for field 2 in case of interlaced content */
if (GST_VIDEO_INFO_IS_INTERLACED (&self->info)) {
gboolean found_cc_field2 = FALSE, found_afd_bar_field2 = FALSE;
guint field2_offset = 0;
/* The VANC lines for the second field are at an offset, depending on
* the format in use
*/
switch (self->info.height) {
case 486:
/* NTSC: 525 / 2 + 1 */
field2_offset = 263;
break;
case 576:
/* PAL: 625 / 2 + 1 */
field2_offset = 313;
break;
case 1080:
/* 1080i: 1125 / 2 + 1 */
field2_offset = 563;
break;
default:
g_assert_not_reached ();
}
/* First try the same lines as for field 1 if we don't know yet */
if (self->last_cc_vbi_line_field2 <= 0)
self->last_cc_vbi_line_field2 = self->last_cc_vbi_line;
if (self->last_afd_bar_vbi_line_field2 <= 0)
self->last_afd_bar_vbi_line_field2 = self->last_afd_bar_vbi_line;
if (self->last_cc_vbi_line_field2 > 0) {
extract_vbi_line (self, buffer, vanc_frame, field2_offset,
self->last_cc_vbi_line_field2, &found_cc_field2,
&found_afd_bar_field2);
}
if (self->last_afd_bar_vbi_line_field2 > 0
&& self->last_cc_vbi_line_field2 !=
self->last_afd_bar_vbi_line_field2) {
extract_vbi_line (self, buffer, vanc_frame, field2_offset,
self->last_afd_bar_vbi_line_field2, &found_cc_field2,
&found_afd_bar_field2);
}
if (!found_cc_field2)
self->last_cc_vbi_line_field2 = -1;
if (!found_afd_bar_field2)
self->last_afd_bar_vbi_line_field2 = -1;
if (((self->output_cc && !found_cc_field2) || (self->output_afd_bar
&& !found_afd_bar_field2))) {
for (line = 1; line < 22; line++) {
extract_vbi_line (self, buffer, vanc_frame, field2_offset, line,
&found_cc_field2, &found_afd_bar_field2);
/* If we found everything we wanted to extract, stop here */
if ((!self->output_cc || found_cc_field2) &&
(!self->output_afd_bar || found_afd_bar_field2))
break;
}
}
}
vanc_frame->Release ();
}
static GstFlowReturn
gst_decklink_video_src_create (GstPushSrc * bsrc, GstBuffer ** buffer)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
GstFlowReturn flow_ret = GST_FLOW_OK;
const guint8 *data;
gsize data_size;
VideoFrame *vf;
CaptureFrame f;
GstCaps *caps;
gboolean caps_changed = FALSE;
const GstDecklinkMode *mode;
static GstStaticCaps stream_reference =
GST_STATIC_CAPS ("timestamp/x-decklink-stream");
static GstStaticCaps hardware_reference =
GST_STATIC_CAPS ("timestamp/x-decklink-hardware");
g_mutex_lock (&self->lock);
retry:
while (gst_queue_array_is_empty (self->current_frames) && !self->flushing) {
g_cond_wait (&self->cond, &self->lock);
}
if (self->flushing) {
GST_DEBUG_OBJECT (self, "Flushing");
g_mutex_unlock (&self->lock);
return GST_FLOW_FLUSHING;
}
f = *(CaptureFrame *) gst_queue_array_pop_head_struct (self->current_frames);
// We will have no frame if frames without signal are dropped immediately
// but we still have to signal that it's lost here.
if (f.no_signal || !f.frame) {
if (self->signal_state != SIGNAL_STATE_LOST) {
self->signal_state = SIGNAL_STATE_LOST;
g_object_notify (G_OBJECT (self), "signal");
GST_ELEMENT_WARNING (GST_ELEMENT (self), RESOURCE, READ, ("Signal lost"),
("No input source was detected - video frames invalid"));
}
// If we have no frame here, simply retry until we got one
if (!f.frame) {
capture_frame_clear (&f);
goto retry;
}
} else {
GstDecklinkSignalState previous_signal_state = self->signal_state;
if (previous_signal_state != SIGNAL_STATE_AVAILABLE) {
self->signal_state = SIGNAL_STATE_AVAILABLE;
g_object_notify (G_OBJECT (self), "signal");
}
if (previous_signal_state == SIGNAL_STATE_LOST) {
GST_ELEMENT_INFO (GST_ELEMENT (self), RESOURCE, READ,
("Signal recovered"), ("Input source detected"));
}
}
// If we're not flushing, we should have a valid frame from the queue
g_assert (f.frame != NULL);
if (self->caps_mode != f.mode) {
if (self->mode == GST_DECKLINK_MODE_AUTO) {
GST_DEBUG_OBJECT (self, "Mode changed from %d to %d", self->caps_mode,
f.mode);
caps_changed = TRUE;
self->caps_mode = f.mode;
} else {
g_mutex_unlock (&self->lock);
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Invalid mode in captured frame"),
("Mode set to %d but captured %d", self->caps_mode, f.mode));
capture_frame_clear (&f);
return GST_FLOW_NOT_NEGOTIATED;
}
}
if (self->caps_format != f.format) {
if (self->video_format == GST_DECKLINK_VIDEO_FORMAT_AUTO) {
GST_DEBUG_OBJECT (self, "Format changed from %d to %d", self->caps_format,
f.format);
caps_changed = TRUE;
self->caps_format = f.format;
} else {
g_mutex_unlock (&self->lock);
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Invalid pixel format in captured frame"),
("Format set to %d but captured %d", self->caps_format, f.format));
capture_frame_clear (&f);
return GST_FLOW_NOT_NEGOTIATED;
}
}
/* 1 ns error can be just a rounding error, so that's OK. The Decklink
* drivers give us a really steady stream time, so anything above 1 ns can't
* be a rounding error and is therefore something to worry about */
if (self->expected_stream_time != GST_CLOCK_TIME_NONE &&
ABSDIFF (self->expected_stream_time, f.stream_timestamp) > 1) {
GstMessage *msg;
GstClockTime running_time;
self->dropped += f.stream_timestamp - self->expected_stream_time;
running_time = gst_segment_to_running_time (&GST_BASE_SRC (self)->segment,
GST_FORMAT_TIME, f.timestamp);
msg =
gst_message_new_qos (GST_OBJECT (self), TRUE, running_time,
f.stream_timestamp, f.timestamp, f.duration);
gst_message_set_qos_stats (msg, GST_FORMAT_TIME, self->processed,
self->dropped);
gst_element_post_message (GST_ELEMENT (self), msg);
}
if (self->first_stream_time == GST_CLOCK_TIME_NONE)
self->first_stream_time = f.stream_timestamp;
self->processed =
f.stream_timestamp - self->dropped - self->first_stream_time;
self->expected_stream_time = f.stream_timestamp + f.stream_duration;
g_mutex_unlock (&self->lock);
if (caps_changed) {
self->last_cc_vbi_line = -1;
self->last_afd_bar_vbi_line = -1;
self->last_cc_vbi_line_field2 = -1;
self->last_afd_bar_vbi_line_field2 = -1;
caps = gst_decklink_mode_get_caps (f.mode, f.format, TRUE);
gst_video_info_from_caps (&self->info, caps);
gst_base_src_set_caps (GST_BASE_SRC_CAST (bsrc), caps);
gst_element_post_message (GST_ELEMENT_CAST (self),
gst_message_new_latency (GST_OBJECT_CAST (self)));
gst_caps_unref (caps);
if (self->vbiparser) {
gst_video_vbi_parser_free (self->vbiparser);
self->vbiparser = NULL;
self->anc_vformat = GST_VIDEO_FORMAT_UNKNOWN;
}
}
f.frame->GetBytes ((gpointer *) & data);
data_size = self->info.size;
vf = (VideoFrame *) g_malloc0 (sizeof (VideoFrame));
*buffer =
gst_buffer_new_wrapped_full ((GstMemoryFlags) GST_MEMORY_FLAG_READONLY,
(gpointer) data, data_size, 0, data_size, vf,
(GDestroyNotify) video_frame_free);
vf->frame = f.frame;
f.frame->AddRef ();
vf->input = self->input->input;
vf->input->AddRef ();
mode = gst_decklink_get_mode (self->mode);
// If we have a format that supports VANC and we are asked to extract CC,
// then do it here.
if ((self->output_cc || self->output_afd_bar)
&& self->signal_state != SIGNAL_STATE_LOST)
extract_vbi (self, buffer, vf, mode);
if (f.no_signal)
GST_BUFFER_FLAG_SET (*buffer, GST_BUFFER_FLAG_GAP);
GST_BUFFER_TIMESTAMP (*buffer) = f.timestamp;
GST_BUFFER_DURATION (*buffer) = f.duration;
if (f.tc != NULL)
gst_buffer_add_video_time_code_meta (*buffer, f.tc);
gst_buffer_add_reference_timestamp_meta (*buffer,
gst_static_caps_get (&stream_reference), f.stream_timestamp,
f.stream_duration);
gst_buffer_add_reference_timestamp_meta (*buffer,
gst_static_caps_get (&hardware_reference), f.hardware_timestamp,
f.hardware_duration);
if (mode->interlaced && mode->tff)
GST_BUFFER_FLAG_SET (*buffer,
GST_VIDEO_BUFFER_FLAG_TFF | GST_VIDEO_BUFFER_FLAG_INTERLACED);
GST_DEBUG_OBJECT (self,
"Outputting buffer %p with timestamp %" GST_TIME_FORMAT " and duration %"
GST_TIME_FORMAT, *buffer, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (*buffer)),
GST_TIME_ARGS (GST_BUFFER_DURATION (*buffer)));
capture_frame_clear (&f);
return flow_ret;
}
static gboolean
gst_decklink_video_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
gboolean ret = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
if (self->input) {
GstClockTime min, max;
const GstDecklinkMode *mode;
g_mutex_lock (&self->lock);
mode = gst_decklink_get_mode (self->caps_mode);
g_mutex_unlock (&self->lock);
min = gst_util_uint64_scale_ceil (GST_SECOND, mode->fps_d, mode->fps_n);
max = self->buffer_size * min;
gst_query_set_latency (query, TRUE, min, max);
ret = TRUE;
} else {
ret = FALSE;
}
break;
}
default:
ret = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
return ret;
}
static gboolean
gst_decklink_video_src_unlock (GstBaseSrc * bsrc)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
g_mutex_lock (&self->lock);
self->flushing = TRUE;
g_cond_signal (&self->cond);
g_mutex_unlock (&self->lock);
return TRUE;
}
static gboolean
gst_decklink_video_src_unlock_stop (GstBaseSrc * bsrc)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
g_mutex_lock (&self->lock);
self->flushing = FALSE;
while (gst_queue_array_get_length (self->current_frames) > 0) {
CaptureFrame *tmp =
(CaptureFrame *) gst_queue_array_pop_head_struct (self->current_frames);
capture_frame_clear (tmp);
}
g_mutex_unlock (&self->lock);
return TRUE;
}
static gboolean
gst_decklink_video_src_open (GstDecklinkVideoSrc * self)
{
const GstDecklinkMode *mode;
GST_DEBUG_OBJECT (self, "Opening");
self->input =
gst_decklink_acquire_nth_input (self->device_number,
GST_ELEMENT_CAST (self), FALSE);
if (!self->input) {
GST_ERROR_OBJECT (self, "Failed to acquire input");
return FALSE;
}
g_object_notify (G_OBJECT (self), "hw-serial-number");
mode = gst_decklink_get_mode (self->mode);
g_assert (mode != NULL);
g_mutex_lock (&self->input->lock);
self->input->mode = mode;
self->input->format = self->caps_format;
self->input->got_video_frame = gst_decklink_video_src_got_frame;
self->input->start_streams = gst_decklink_video_src_start_streams;
g_mutex_unlock (&self->input->lock);
return TRUE;
}
static gboolean
gst_decklink_video_src_close (GstDecklinkVideoSrc * self)
{
GST_DEBUG_OBJECT (self, "Closing");
if (self->input) {
g_mutex_lock (&self->input->lock);
self->input->got_video_frame = NULL;
self->input->mode = NULL;
self->input->video_enabled = FALSE;
self->input->start_streams = NULL;
g_mutex_unlock (&self->input->lock);
gst_decklink_release_nth_input (self->device_number,
GST_ELEMENT_CAST (self), FALSE);
self->input = NULL;
}
return TRUE;
}
static gboolean
gst_decklink_video_src_stop (GstDecklinkVideoSrc * self)
{
GST_DEBUG_OBJECT (self, "Stopping");
while (gst_queue_array_get_length (self->current_frames) > 0) {
CaptureFrame *tmp =
(CaptureFrame *) gst_queue_array_pop_head_struct (self->current_frames);
capture_frame_clear (tmp);
}
self->caps_mode = GST_DECKLINK_MODE_AUTO;
if (self->input && self->input->video_enabled) {
g_mutex_lock (&self->input->lock);
self->input->video_enabled = FALSE;
g_mutex_unlock (&self->input->lock);
self->input->input->DisableVideoInput ();
}
if (self->vbiparser) {
gst_video_vbi_parser_free (self->vbiparser);
self->vbiparser = NULL;
self->anc_vformat = GST_VIDEO_FORMAT_UNKNOWN;
}
return TRUE;
}
static void
gst_decklink_video_src_start_streams (GstElement * element)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);
HRESULT res;
if (self->input->video_enabled && (!self->input->audiosrc
|| self->input->audio_enabled)
&& (GST_STATE (self) == GST_STATE_PLAYING
|| GST_STATE_PENDING (self) == GST_STATE_PLAYING)) {
GST_DEBUG_OBJECT (self, "Starting streams");
g_mutex_lock (&self->lock);
self->first_time = GST_CLOCK_TIME_NONE;
self->window_fill = 0;
self->window_filled = FALSE;
self->window_skip = 1;
self->window_skip_count = 0;
self->current_time_mapping.xbase = 0;
self->current_time_mapping.b = 0;
self->current_time_mapping.num = 1;
self->current_time_mapping.den = 1;
self->next_time_mapping.xbase = 0;
self->next_time_mapping.b = 0;
self->next_time_mapping.num = 1;
self->next_time_mapping.den = 1;
g_mutex_unlock (&self->lock);
res = self->input->input->StartStreams ();
if (res != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to start streams: 0x%08lx", (unsigned long) res));
return;
}
} else {
GST_DEBUG_OBJECT (self, "Not starting streams yet");
}
}
static GstStateChangeReturn
gst_decklink_video_src_change_state (GstElement * element,
GstStateChange transition)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
self->processed = 0;
self->dropped = 0;
self->expected_stream_time = GST_CLOCK_TIME_NONE;
self->first_stream_time = GST_CLOCK_TIME_NONE;
if (!gst_decklink_video_src_open (self)) {
ret = GST_STATE_CHANGE_FAILURE;
goto out;
}
if (self->mode == GST_DECKLINK_MODE_AUTO &&
self->video_format != GST_DECKLINK_VIDEO_FORMAT_AUTO) {
GST_WARNING_OBJECT (self, "Warning: mode=auto and format!=auto may \
not work");
}
self->vbiparser = NULL;
self->anc_vformat = GST_VIDEO_FORMAT_UNKNOWN;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
self->flushing = FALSE;
break;
default:
break;
}
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
self->signal_state = SIGNAL_STATE_UNKNOWN;
gst_decklink_video_src_stop (self);
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:{
HRESULT res;
GST_DEBUG_OBJECT (self, "Stopping streams");
res = self->input->input->StopStreams ();
if (res != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to stop streams: 0x%08lx", (unsigned long) res));
ret = GST_STATE_CHANGE_FAILURE;
}
break;
}
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
g_mutex_lock (&self->input->lock);
if (self->input->start_streams)
self->input->start_streams (self->input->videosrc);
g_mutex_unlock (&self->input->lock);
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
gst_decklink_video_src_close (self);
break;
default:
break;
}
out:
return ret;
}
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