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gstreamer/sys/decklink/gstdecklinkvideosrc.cpp

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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
* independent 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 independent 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_PROFILE_ID,
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_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->query = GST_DEBUG_FUNCPTR (gst_decklink_video_src_query);
basesrc_class->negotiate = NULL;
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)));
/**
* GstDecklinkVideoSrc:profile
*
* Specifies decklink profile to use.
*
* Since: 1.20
*/
g_object_class_install_property (gobject_class, PROP_PROFILE_ID,
g_param_spec_enum ("profile", "Profile",
"Certain DeckLink devices such as the DeckLink 8K Pro, the DeckLink "
"Quad 2 and the DeckLink Duo 2 support multiple profiles to "
"configure the capture and playback behavior of its sub-devices."
"For the DeckLink Duo 2 and DeckLink Quad 2, a profile is shared "
"between any 2 sub-devices that utilize the same connectors. For the "
"DeckLink 8K Pro, a profile is shared between all 4 sub-devices. Any "
"sub-devices that share a profile are considered to be part of the "
"same profile group."
"DeckLink Duo 2 support configuration of the duplex mode of "
"individual sub-devices.",
GST_TYPE_DECKLINK_PROFILE_ID, GST_DECKLINK_PROFILE_ID_ONE_SUB_DEVICE_FULL_DUPLEX,
(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->profile_id = bmdProfileOneSubDeviceFullDuplex;
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);
gst_pad_use_fixed_caps (GST_BASE_SRC_PAD (self));
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_PROFILE_ID:
self->profile_id =
gst_decklink_profile_id_from_enum ((GstDecklinkProfileId)
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_PROFILE_ID:
g_value_set_enum (value,
gst_decklink_profile_id_to_enum (self->profile_id));
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_start (GstDecklinkVideoSrc * self)
{
const GstDecklinkMode *mode;
BMDVideoInputFlags flags;
HRESULT ret;
BMDPixelFormat format;
g_mutex_lock (&self->input->lock);
if (self->input->video_enabled) {
g_mutex_unlock (&self->input->lock);
return TRUE;
}
g_mutex_unlock (&self->input->lock);
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 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)
{
IDeckLinkVideoFrameAncillary *vanc_frame = NULL;
gint line;
GstVideoFormat videoformat;
GstDecklinkModeEnum mode_enum;
const GstDecklinkMode *mode;
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 ());
mode_enum =
gst_decklink_get_mode_enum_from_bmd (vanc_frame->GetDisplayMode ());
mode = gst_decklink_get_mode (mode_enum);
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 || mode->width != self->anc_width)
&& 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;
self->anc_width = mode->width;
}
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");
if (!gst_decklink_video_src_start (self)) {
return GST_FLOW_NOT_NEGOTIATED;
}
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 (!gst_pad_has_current_caps (GST_BASE_SRC_PAD (self))) {
caps_changed = TRUE;
}
if (self->caps_mode != f.mode) {
if (self->mode == GST_DECKLINK_MODE_AUTO
|| !gst_pad_has_current_caps (GST_BASE_SRC_PAD (self))) {
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_pad_has_current_caps (GST_BASE_SRC_PAD (self))) {
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;
self->anc_width = 0;
}
}
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 ();
// 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);
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);
mode = gst_decklink_get_mode (self->caps_mode);
if (mode->interlaced && mode->tff)
GST_BUFFER_FLAG_SET (*buffer,
GST_VIDEO_BUFFER_FLAG_TFF | GST_VIDEO_BUFFER_FLAG_INTERLACED);
else if (mode->interlaced)
GST_BUFFER_FLAG_SET (*buffer, 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;
self->anc_width = 0;
}
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;
self->anc_width = 0;
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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