mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-25 11:11:08 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/sys/decklink/gstdecklinkvideosink.cpp
Sebastian Dröge 822abde8a4 decklinkvideosink: Don't forget to unref clock after usage 
And don't unref a clock that is potentially NULL.
2019-01-02 17:39:19 +02:00

1455 lines
47 KiB
C++
Raw Blame History

/* GStreamer
* Copyright (C) 2011 David Schleef <ds@entropywave.com>
* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdecklinkvideosink.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_decklink_video_sink_debug);
#define GST_CAT_DEFAULT gst_decklink_video_sink_debug
class GStreamerVideoOutputCallback:public IDeckLinkVideoOutputCallback
{
public:
GStreamerVideoOutputCallback (GstDecklinkVideoSink * sink)
:IDeckLinkVideoOutputCallback (), m_refcount (1)
{
m_sink = GST_DECKLINK_VIDEO_SINK_CAST (gst_object_ref (sink));
g_mutex_init (&m_mutex);
}
virtual HRESULT WINAPI QueryInterface (REFIID, LPVOID *)
{
return E_NOINTERFACE;
}
virtual ULONG WINAPI AddRef (void)
{
ULONG ret;
g_mutex_lock (&m_mutex);
m_refcount++;
ret = m_refcount;
g_mutex_unlock (&m_mutex);
return ret;
}
virtual ULONG WINAPI Release (void)
{
ULONG ret;
g_mutex_lock (&m_mutex);
m_refcount--;
ret = m_refcount;
g_mutex_unlock (&m_mutex);
if (ret == 0) {
delete this;
}
return ret;
}
virtual HRESULT WINAPI ScheduledFrameCompleted (IDeckLinkVideoFrame *
completedFrame, BMDOutputFrameCompletionResult result)
{
switch (result) {
case bmdOutputFrameCompleted:
GST_LOG_OBJECT (m_sink, "Completed frame %p", completedFrame);
break;
case bmdOutputFrameDisplayedLate:
GST_INFO_OBJECT (m_sink, "Late Frame %p", completedFrame);
break;
case bmdOutputFrameDropped:
GST_INFO_OBJECT (m_sink, "Dropped Frame %p", completedFrame);
break;
case bmdOutputFrameFlushed:
GST_DEBUG_OBJECT (m_sink, "Flushed Frame %p", completedFrame);
break;
default:
GST_INFO_OBJECT (m_sink, "Unknown Frame %p: %d", completedFrame,
(gint) result);
break;
}
return S_OK;
}
virtual HRESULT WINAPI ScheduledPlaybackHasStopped (void)
{
GST_LOG_OBJECT (m_sink, "Scheduled playback stopped");
if (m_sink->output) {
g_mutex_lock (&m_sink->output->lock);
g_cond_signal (&m_sink->output->cond);
g_mutex_unlock (&m_sink->output->lock);
}
return S_OK;
}
virtual ~ GStreamerVideoOutputCallback () {
gst_object_unref (m_sink);
g_mutex_clear (&m_mutex);
}
private:
GstDecklinkVideoSink * m_sink;
GMutex m_mutex;
gint m_refcount;
};
enum
{
PROP_0,
PROP_MODE,
PROP_DEVICE_NUMBER,
PROP_VIDEO_FORMAT,
PROP_TIMECODE_FORMAT,
PROP_KEYER_MODE,
PROP_KEYER_LEVEL,
PROP_HW_SERIAL_NUMBER,
PROP_CC_LINE,
};
static void gst_decklink_video_sink_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_decklink_video_sink_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_decklink_video_sink_finalize (GObject * object);
static GstStateChangeReturn
gst_decklink_video_sink_change_state (GstElement * element,
GstStateChange transition);
static GstClock *gst_decklink_video_sink_provide_clock (GstElement * element);
static GstCaps *gst_decklink_video_sink_get_caps (GstBaseSink * bsink,
GstCaps * filter);
static gboolean gst_decklink_video_sink_set_caps (GstBaseSink * bsink,
GstCaps * caps);
static GstFlowReturn gst_decklink_video_sink_prepare (GstBaseSink * bsink,
GstBuffer * buffer);
static GstFlowReturn gst_decklink_video_sink_render (GstBaseSink * bsink,
GstBuffer * buffer);
static gboolean gst_decklink_video_sink_open (GstBaseSink * bsink);
static gboolean gst_decklink_video_sink_close (GstBaseSink * bsink);
static gboolean gst_decklink_video_sink_stop (GstDecklinkVideoSink * self);
static gboolean gst_decklink_video_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static gboolean gst_decklink_video_sink_event (GstBaseSink * bsink,
GstEvent * event);
static void
gst_decklink_video_sink_start_scheduled_playback (GstElement * element);
#define parent_class gst_decklink_video_sink_parent_class
G_DEFINE_TYPE (GstDecklinkVideoSink, gst_decklink_video_sink,
GST_TYPE_BASE_SINK);
static gboolean
reset_framerate (GstCapsFeatures * features, GstStructure * structure,
gpointer user_data)
{
gst_structure_set (structure, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
G_MAXINT, 1, NULL);
return TRUE;
}
static void
gst_decklink_video_sink_class_init (GstDecklinkVideoSinkClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstBaseSinkClass *basesink_class = GST_BASE_SINK_CLASS (klass);
GstCaps *templ_caps;
gobject_class->set_property = gst_decklink_video_sink_set_property;
gobject_class->get_property = gst_decklink_video_sink_get_property;
gobject_class->finalize = gst_decklink_video_sink_finalize;
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_decklink_video_sink_change_state);
element_class->provide_clock =
GST_DEBUG_FUNCPTR (gst_decklink_video_sink_provide_clock);
basesink_class->get_caps =
GST_DEBUG_FUNCPTR (gst_decklink_video_sink_get_caps);
basesink_class->set_caps =
GST_DEBUG_FUNCPTR (gst_decklink_video_sink_set_caps);
basesink_class->prepare = GST_DEBUG_FUNCPTR (gst_decklink_video_sink_prepare);
basesink_class->render = GST_DEBUG_FUNCPTR (gst_decklink_video_sink_render);
// FIXME: These are misnamed in basesink!
basesink_class->start = GST_DEBUG_FUNCPTR (gst_decklink_video_sink_open);
basesink_class->stop = GST_DEBUG_FUNCPTR (gst_decklink_video_sink_close);
basesink_class->propose_allocation =
GST_DEBUG_FUNCPTR (gst_decklink_video_sink_propose_allocation);
basesink_class->event = GST_DEBUG_FUNCPTR (gst_decklink_video_sink_event);
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, GST_DECKLINK_MODE_NTSC,
(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_VIDEO_FORMAT,
g_param_spec_enum ("video-format", "Video format",
"Video format type to use for playback",
GST_TYPE_DECKLINK_VIDEO_FORMAT, GST_DECKLINK_VIDEO_FORMAT_8BIT_YUV,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_TIMECODE_FORMAT,
g_param_spec_enum ("timecode-format", "Timecode format",
"Timecode format type to use for playback",
GST_TYPE_DECKLINK_TIMECODE_FORMAT,
GST_DECKLINK_TIMECODE_FORMAT_RP188ANY,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_KEYER_MODE,
g_param_spec_enum ("keyer-mode", "Keyer mode",
"Keyer mode to be enabled",
GST_TYPE_DECKLINK_KEYER_MODE,
GST_DECKLINK_KEYER_MODE_OFF,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property (gobject_class, PROP_KEYER_LEVEL,
g_param_spec_int ("keyer-level", "Keyer level",
"Keyer level", 0, 255, 255,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
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_CC_LINE,
g_param_spec_int ("cc-line", "CC Line",
"Line number to use for inserting closed captions (0 = disabled)", 0,
22, 0,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
templ_caps = gst_decklink_mode_get_template_caps (FALSE);
templ_caps = gst_caps_make_writable (templ_caps);
/* For output we support any framerate and only really care about timestamps */
gst_caps_map_in_place (templ_caps, reset_framerate, NULL);
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, templ_caps));
gst_caps_unref (templ_caps);
gst_element_class_set_static_metadata (element_class, "Decklink Video Sink",
"Video/Sink", "Decklink Sink", "David Schleef <ds@entropywave.com>, "
"Sebastian Dröge <sebastian@centricular.com>");
GST_DEBUG_CATEGORY_INIT (gst_decklink_video_sink_debug, "decklinkvideosink",
0, "debug category for decklinkvideosink element");
}
static void
gst_decklink_video_sink_init (GstDecklinkVideoSink * self)
{
self->mode = GST_DECKLINK_MODE_NTSC;
self->device_number = 0;
self->video_format = GST_DECKLINK_VIDEO_FORMAT_8BIT_YUV;
/* VITC is legacy, we should expect RP188 in modern use cases */
self->timecode_format = bmdTimecodeRP188Any;
self->caption_line = 0;
gst_base_sink_set_max_lateness (GST_BASE_SINK_CAST (self), 20 * GST_MSECOND);
gst_base_sink_set_qos_enabled (GST_BASE_SINK_CAST (self), TRUE);
}
void
gst_decklink_video_sink_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (object);
switch (property_id) {
case PROP_MODE:
self->mode = (GstDecklinkModeEnum) g_value_get_enum (value);
break;
case PROP_DEVICE_NUMBER:
self->device_number = g_value_get_int (value);
break;
case PROP_VIDEO_FORMAT:
self->video_format = (GstDecklinkVideoFormat) g_value_get_enum (value);
switch (self->video_format) {
case GST_DECKLINK_VIDEO_FORMAT_AUTO:
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:
break;
default:
GST_ELEMENT_WARNING (GST_ELEMENT (self), CORE, NOT_IMPLEMENTED,
("Format %d not supported", self->video_format), (NULL));
break;
}
break;
case PROP_TIMECODE_FORMAT:
self->timecode_format =
gst_decklink_timecode_format_from_enum ((GstDecklinkTimecodeFormat)
g_value_get_enum (value));
break;
case PROP_KEYER_MODE:
self->keyer_mode =
gst_decklink_keyer_mode_from_enum ((GstDecklinkKeyerMode)
g_value_get_enum (value));
break;
case PROP_KEYER_LEVEL:
self->keyer_level = g_value_get_int (value);
break;
case PROP_CC_LINE:
self->caption_line = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_video_sink_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (object);
switch (property_id) {
case PROP_MODE:
g_value_set_enum (value, self->mode);
break;
case PROP_DEVICE_NUMBER:
g_value_set_int (value, self->device_number);
break;
case PROP_VIDEO_FORMAT:
g_value_set_enum (value, self->video_format);
break;
case PROP_TIMECODE_FORMAT:
g_value_set_enum (value,
gst_decklink_timecode_format_to_enum (self->timecode_format));
break;
case PROP_KEYER_MODE:
g_value_set_enum (value,
gst_decklink_keyer_mode_to_enum (self->keyer_mode));
break;
case PROP_KEYER_LEVEL:
g_value_set_int (value, self->keyer_level);
break;
case PROP_HW_SERIAL_NUMBER:
if (self->output)
g_value_set_string (value, self->output->hw_serial_number);
else
g_value_set_string (value, NULL);
break;
case PROP_CC_LINE:
g_value_set_int (value, self->caption_line);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_video_sink_finalize (GObject * object)
{
//GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_decklink_video_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
const GstDecklinkMode *mode;
HRESULT ret;
BMDVideoOutputFlags flags;
GstVideoInfo info;
GST_DEBUG_OBJECT (self, "Setting caps %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&info, caps))
return FALSE;
g_mutex_lock (&self->output->lock);
if (self->output->video_enabled) {
if (self->info.finfo->format == info.finfo->format &&
self->info.width == info.width && self->info.height == info.height) {
// FIXME: We should also consider the framerate as it is used
// for mode selection below in auto mode
GST_DEBUG_OBJECT (self, "Nothing relevant has changed");
self->info = info;
g_mutex_unlock (&self->output->lock);
return TRUE;
} else {
GST_DEBUG_OBJECT (self, "Reconfiguration not supported at this point");
g_mutex_unlock (&self->output->lock);
return FALSE;
}
}
g_mutex_unlock (&self->output->lock);
self->output->output->SetScheduledFrameCompletionCallback (new
GStreamerVideoOutputCallback (self));
if (self->mode == GST_DECKLINK_MODE_AUTO) {
BMDPixelFormat f;
mode = gst_decklink_find_mode_and_format_for_caps (caps, &f);
if (mode == NULL) {
GST_WARNING_OBJECT (self,
"Failed to find compatible mode for caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
if (self->video_format != GST_DECKLINK_VIDEO_FORMAT_AUTO &&
gst_decklink_pixel_format_from_type (self->video_format) != f) {
GST_WARNING_OBJECT (self, "Failed to set pixel format to %d",
self->video_format);
return FALSE;
}
} else {
/* We don't have to give the format in EnableVideoOutput. Therefore,
* even if it's AUTO, we have it stored in self->info and set it in
* gst_decklink_video_sink_prepare */
mode = gst_decklink_get_mode (self->mode);
g_assert (mode != NULL);
};
/* enable or disable keyer */
if (self->output->keyer != NULL) {
if (self->keyer_mode == bmdKeyerModeOff) {
self->output->keyer->Disable ();
} else if (self->keyer_mode == bmdKeyerModeInternal) {
self->output->keyer->Enable (false);
self->output->keyer->SetLevel (self->keyer_level);
} else if (self->keyer_mode == bmdKeyerModeExternal) {
self->output->keyer->Enable (true);
self->output->keyer->SetLevel (self->keyer_level);
} else {
g_assert_not_reached ();
}
} else if (self->keyer_mode != bmdKeyerModeOff) {
GST_WARNING_OBJECT (self, "Failed to set keyer to mode %d",
self->keyer_mode);
}
/* The timecode_format itself is used when we embed the actual timecode data
* into the frame. Now we only need to know which of the two standards the
* timecode format will adhere to: VITC or RP188, and send the appropriate
* flag to EnableVideoOutput. The exact format is specified later.
*
* Note that this flag will have no effect in practice if the video stream
* does not contain timecode metadata.
*/
if (self->timecode_format == GST_DECKLINK_TIMECODE_FORMAT_VITC ||
self->timecode_format == GST_DECKLINK_TIMECODE_FORMAT_VITCFIELD2)
flags = bmdVideoOutputVITC;
else
flags = bmdVideoOutputRP188;
if (self->caption_line > 0)
flags = (BMDVideoOutputFlags) (flags | bmdVideoOutputVANC);
ret = self->output->output->EnableVideoOutput (mode->mode, flags);
if (ret != S_OK) {
GST_WARNING_OBJECT (self, "Failed to enable video output: 0x%08lx",
(unsigned long) ret);
return FALSE;
}
self->info = info;
g_mutex_lock (&self->output->lock);
self->output->mode = mode;
self->output->video_enabled = TRUE;
if (self->output->start_scheduled_playback)
self->output->start_scheduled_playback (self->output->videosink);
g_mutex_unlock (&self->output->lock);
if (self->vbiencoder) {
gst_video_vbi_encoder_free (self->vbiencoder);
self->vbiencoder = NULL;
self->anc_vformat = GST_VIDEO_FORMAT_UNKNOWN;
}
return TRUE;
}
static GstCaps *
gst_decklink_video_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
GstCaps *mode_caps, *caps;
if (self->mode == GST_DECKLINK_MODE_AUTO
&& self->video_format == GST_DECKLINK_VIDEO_FORMAT_AUTO)
mode_caps = gst_decklink_mode_get_template_caps (FALSE);
else if (self->video_format == GST_DECKLINK_VIDEO_FORMAT_AUTO)
mode_caps = gst_decklink_mode_get_caps_all_formats (self->mode, FALSE);
else if (self->mode == GST_DECKLINK_MODE_AUTO)
mode_caps =
gst_decklink_pixel_format_get_caps (gst_decklink_pixel_format_from_type
(self->video_format), FALSE);
else
mode_caps =
gst_decklink_mode_get_caps (self->mode,
gst_decklink_pixel_format_from_type (self->video_format), FALSE);
mode_caps = gst_caps_make_writable (mode_caps);
/* For output we support any framerate and only really care about timestamps */
gst_caps_map_in_place (mode_caps, reset_framerate, NULL);
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 GstFlowReturn
gst_decklink_video_sink_render (GstBaseSink * bsink, GstBuffer * buffer)
{
return GST_FLOW_OK;
}
void
gst_decklink_video_sink_convert_to_internal_clock (GstDecklinkVideoSink * self,
GstClockTime * timestamp, GstClockTime * duration)
{
GstClock *clock;
GstClockTime internal_base, external_base, internal_offset;
g_assert (timestamp != NULL);
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
GST_OBJECT_LOCK (self);
internal_base = self->internal_base_time;
external_base = self->external_base_time;
internal_offset = self->internal_time_offset;
GST_OBJECT_UNLOCK (self);
if (!clock || clock != self->output->clock) {
GstClockTime internal, external, rate_n, rate_d;
GstClockTime external_timestamp = *timestamp;
GstClockTime base_time;
gst_clock_get_calibration (self->output->clock, &internal, &external,
&rate_n, &rate_d);
// Convert to the running time corresponding to both clock times
if (!GST_CLOCK_TIME_IS_VALID (internal_base) || internal < internal_base)
internal = 0;
else
internal -= internal_base;
if (!GST_CLOCK_TIME_IS_VALID (external_base) || external < external_base)
external = 0;
else
external -= external_base;
// Convert timestamp to the "running time" since we started scheduled
// playback, that is the difference between the pipeline's base time
// and our own base time.
base_time = gst_element_get_base_time (GST_ELEMENT_CAST (self));
if (base_time > external_base)
base_time = 0;
else
base_time = external_base - base_time;
if (external_timestamp < base_time)
external_timestamp = 0;
else
external_timestamp = external_timestamp - base_time;
// Get the difference in the external time, note
// that the running time is external time.
// Then scale this difference and offset it to
// our internal time. Now we have the running time
// according to our internal clock.
//
// For the duration we just scale
*timestamp =
gst_clock_unadjust_with_calibration (NULL, external_timestamp,
internal, external, rate_n, rate_d);
GST_LOG_OBJECT (self,
"Converted %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT " (internal: %"
GST_TIME_FORMAT " external %" GST_TIME_FORMAT " rate: %lf)",
GST_TIME_ARGS (external_timestamp), GST_TIME_ARGS (*timestamp),
GST_TIME_ARGS (internal), GST_TIME_ARGS (external),
((gdouble) rate_n) / ((gdouble) rate_d));
if (duration) {
GstClockTime external_duration = *duration;
*duration = gst_util_uint64_scale (external_duration, rate_d, rate_n);
GST_LOG_OBJECT (self,
"Converted duration %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
" (internal: %" GST_TIME_FORMAT " external %" GST_TIME_FORMAT
" rate: %lf)", GST_TIME_ARGS (external_duration),
GST_TIME_ARGS (*duration), GST_TIME_ARGS (internal),
GST_TIME_ARGS (external), ((gdouble) rate_n) / ((gdouble) rate_d));
}
} else {
GST_LOG_OBJECT (self, "No clock conversion needed, same clocks: %"
GST_TIME_FORMAT, GST_TIME_ARGS (*timestamp));
}
if (external_base != GST_CLOCK_TIME_NONE &&
internal_base != GST_CLOCK_TIME_NONE)
*timestamp += internal_offset;
else
*timestamp = gst_clock_get_internal_time (self->output->clock);
GST_LOG_OBJECT (self, "Output timestamp %" GST_TIME_FORMAT
" using clock epoch %" GST_TIME_FORMAT,
GST_TIME_ARGS (*timestamp), GST_TIME_ARGS (self->output->clock_epoch));
if (clock)
gst_object_unref (clock);
}
/* Copied from ext/closedcaption/gstccconverter.c */
/* Converts raw CEA708 cc_data and an optional timecode into CDP */
static guint
convert_cea708_cc_data_cea708_cdp_internal (GstDecklinkVideoSink * self,
const guint8 * cc_data, guint cc_data_len, guint8 * cdp, guint cdp_len,
const GstVideoTimeCodeMeta * tc_meta)
{
GstByteWriter bw;
guint8 flags, checksum;
guint i, len;
const GstDecklinkMode *mode = gst_decklink_get_mode (self->mode);
gst_byte_writer_init_with_data (&bw, cdp, cdp_len, FALSE);
gst_byte_writer_put_uint16_be_unchecked (&bw, 0x9669);
/* Write a length of 0 for now */
gst_byte_writer_put_uint8_unchecked (&bw, 0);
if (mode->fps_n == 24000 && mode->fps_d == 1001) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x1f);
} else if (mode->fps_n == 24 && mode->fps_d == 1) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x2f);
} else if (mode->fps_n == 25 && mode->fps_d == 1) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x3f);
} else if (mode->fps_n == 30 && mode->fps_d == 1001) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x4f);
} else if (mode->fps_n == 30 && mode->fps_d == 1) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x5f);
} else if (mode->fps_n == 50 && mode->fps_d == 1) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x6f);
} else if (mode->fps_n == 60000 && mode->fps_d == 1001) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x7f);
} else if (mode->fps_n == 60 && mode->fps_d == 1) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x8f);
} else {
g_assert_not_reached ();
}
/* ccdata_present | caption_service_active */
flags = 0x42;
/* time_code_present */
if (tc_meta)
flags |= 0x80;
/* reserved */
flags |= 0x01;
gst_byte_writer_put_uint8_unchecked (&bw, flags);
gst_byte_writer_put_uint16_be_unchecked (&bw, self->cdp_hdr_sequence_cntr);
if (tc_meta) {
const GstVideoTimeCode *tc = &tc_meta->tc;
gst_byte_writer_put_uint8_unchecked (&bw, 0x71);
gst_byte_writer_put_uint8_unchecked (&bw, 0xc0 |
(((tc->hours % 10) & 0x3) << 4) |
((tc->hours - (tc->hours % 10)) & 0xf));
gst_byte_writer_put_uint8_unchecked (&bw, 0x80 |
(((tc->minutes % 10) & 0x7) << 4) |
((tc->minutes - (tc->minutes % 10)) & 0xf));
gst_byte_writer_put_uint8_unchecked (&bw,
(tc->field_count <
2 ? 0x00 : 0x80) | (((tc->seconds %
10) & 0x7) << 4) | ((tc->seconds -
(tc->seconds % 10)) & 0xf));
gst_byte_writer_put_uint8_unchecked (&bw,
((tc->config.flags & GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME) ? 0x80 :
0x00) | (((tc->frames % 10) & 0x3) << 4) | ((tc->frames -
(tc->frames % 10)) & 0xf));
}
gst_byte_writer_put_uint8_unchecked (&bw, 0x72);
gst_byte_writer_put_uint8_unchecked (&bw, 0xe0 | cc_data_len / 3);
gst_byte_writer_put_data_unchecked (&bw, cc_data, cc_data_len);
gst_byte_writer_put_uint8_unchecked (&bw, 0x74);
gst_byte_writer_put_uint16_be_unchecked (&bw, self->cdp_hdr_sequence_cntr);
self->cdp_hdr_sequence_cntr++;
/* We calculate the checksum afterwards */
gst_byte_writer_put_uint8_unchecked (&bw, 0);
len = gst_byte_writer_get_pos (&bw);
gst_byte_writer_set_pos (&bw, 2);
gst_byte_writer_put_uint8_unchecked (&bw, len);
checksum = 0;
for (i = 0; i < len; i++) {
checksum += cdp[i];
}
checksum &= 0xff;
checksum = 256 - checksum;
cdp[len - 1] = checksum;
return len;
}
static GstFlowReturn
gst_decklink_video_sink_prepare (GstBaseSink * bsink, GstBuffer * buffer)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
GstVideoFrame vframe;
IDeckLinkMutableVideoFrame *frame;
guint8 *outdata, *indata;
GstFlowReturn flow_ret;
HRESULT ret;
GstClockTime timestamp, duration;
GstClockTime running_time, running_time_duration;
GstClockTime latency, render_delay;
GstClockTimeDiff ts_offset;
gint i;
GstDecklinkVideoFormat caps_format;
BMDPixelFormat format;
gint stride;
GstVideoTimeCodeMeta *tc_meta;
GST_DEBUG_OBJECT (self, "Preparing buffer %p", buffer);
// FIXME: Handle no timestamps
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
return GST_FLOW_ERROR;
}
caps_format = gst_decklink_type_from_video_format (self->info.finfo->format);
format = gst_decklink_pixel_format_from_type (caps_format);
timestamp = GST_BUFFER_TIMESTAMP (buffer);
duration = GST_BUFFER_DURATION (buffer);
if (duration == GST_CLOCK_TIME_NONE) {
duration =
gst_util_uint64_scale_int (GST_SECOND, self->info.fps_d,
self->info.fps_n);
}
running_time =
gst_segment_to_running_time (&GST_BASE_SINK_CAST (self)->segment,
GST_FORMAT_TIME, timestamp);
running_time_duration =
gst_segment_to_running_time (&GST_BASE_SINK_CAST (self)->segment,
GST_FORMAT_TIME, timestamp + duration) - running_time;
/* See gst_base_sink_adjust_time() */
latency = gst_base_sink_get_latency (bsink);
render_delay = gst_base_sink_get_render_delay (bsink);
ts_offset = gst_base_sink_get_ts_offset (bsink);
running_time += latency;
if (ts_offset < 0) {
ts_offset = -ts_offset;
if ((GstClockTime) ts_offset < running_time)
running_time -= ts_offset;
else
running_time = 0;
} else {
running_time += ts_offset;
}
if (running_time > render_delay)
running_time -= render_delay;
else
running_time = 0;
ret = self->output->output->CreateVideoFrame (self->info.width,
self->info.height, self->info.stride[0], format, bmdFrameFlagDefault,
&frame);
if (ret != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to create video frame: 0x%08lx", (unsigned long) ret));
return GST_FLOW_ERROR;
}
if (!gst_video_frame_map (&vframe, &self->info, buffer, GST_MAP_READ)) {
GST_ERROR_OBJECT (self, "Failed to map video frame");
flow_ret = GST_FLOW_ERROR;
goto out;
}
frame->GetBytes ((void **) &outdata);
indata = (guint8 *) GST_VIDEO_FRAME_PLANE_DATA (&vframe, 0);
stride =
MIN (GST_VIDEO_FRAME_PLANE_STRIDE (&vframe, 0), frame->GetRowBytes ());
for (i = 0; i < self->info.height; i++) {
memcpy (outdata, indata, stride);
indata += GST_VIDEO_FRAME_PLANE_STRIDE (&vframe, 0);
outdata += frame->GetRowBytes ();
}
gst_video_frame_unmap (&vframe);
tc_meta = gst_buffer_get_video_time_code_meta (buffer);
if (tc_meta) {
BMDTimecodeFlags bflags = (BMDTimecodeFlags) 0;
gchar *tc_str;
if (((GstVideoTimeCodeFlags) (tc_meta->tc.
config.flags)) & GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME)
bflags = (BMDTimecodeFlags) (bflags | bmdTimecodeIsDropFrame);
else
bflags = (BMDTimecodeFlags) (bflags | bmdTimecodeFlagDefault);
if (tc_meta->tc.field_count == 2)
bflags = (BMDTimecodeFlags) (bflags | bmdTimecodeFieldMark);
tc_str = gst_video_time_code_to_string (&tc_meta->tc);
ret = frame->SetTimecodeFromComponents (self->timecode_format,
(uint8_t) tc_meta->tc.hours,
(uint8_t) tc_meta->tc.minutes,
(uint8_t) tc_meta->tc.seconds, (uint8_t) tc_meta->tc.frames, bflags);
if (ret != S_OK) {
GST_ERROR_OBJECT (self,
"Failed to set timecode %s to video frame: 0x%08lx", tc_str,
(unsigned long) ret);
flow_ret = GST_FLOW_ERROR;
g_free (tc_str);
goto out;
}
GST_DEBUG_OBJECT (self, "Set frame timecode to %s", tc_str);
g_free (tc_str);
}
if (self->caption_line != 0) {
IDeckLinkVideoFrameAncillary *vanc_frame = NULL;
gpointer iter = NULL;
GstVideoCaptionMeta *cc_meta;
guint8 *vancdata;
gboolean got_captions = FALSE;
/* Put any closed captions into the configured line */
while ((cc_meta =
(GstVideoCaptionMeta *) gst_buffer_iterate_meta_filtered (buffer,
&iter, GST_VIDEO_CAPTION_META_API_TYPE))) {
if (self->vbiencoder == NULL) {
self->vbiencoder =
gst_video_vbi_encoder_new (self->info.finfo->format,
self->info.width);
self->anc_vformat = self->info.finfo->format;
}
switch (cc_meta->caption_type) {
case GST_VIDEO_CAPTION_TYPE_CEA608_RAW:{
guint8 data[138];
guint i, n;
n = cc_meta->size / 2;
if (cc_meta->size > 46) {
GST_WARNING_OBJECT (self, "Too big raw CEA608 buffer");
break;
}
/* This is the offset from line 9 for 525-line fields and from line
* 5 for 625-line fields.
*
* The highest bit is set for field 1 but not for field 0, but we
* have no way of knowning the field here
*/
for (i = 0; i < n; i++) {
data[3 * i] =
self->info.height ==
525 ? self->caption_line - 9 : self->caption_line - 5;
data[3 * i + 1] = cc_meta->data[2 * i];
data[3 * i + 2] = cc_meta->data[2 * i + 1];
}
if (!gst_video_vbi_encoder_add_ancillary (self->vbiencoder,
FALSE,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 >> 8,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 & 0xff, data, 3))
GST_WARNING_OBJECT (self, "Couldn't add meta to ancillary data");
got_captions = TRUE;
break;
}
case GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A:{
if (!gst_video_vbi_encoder_add_ancillary (self->vbiencoder,
FALSE,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 >> 8,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 & 0xff, cc_meta->data,
cc_meta->size))
GST_WARNING_OBJECT (self, "Couldn't add meta to ancillary data");
got_captions = TRUE;
break;
}
case GST_VIDEO_CAPTION_TYPE_CEA708_RAW:{
guint8 data[256];
guint n;
n = cc_meta->size / 3;
if (cc_meta->size > 46) {
GST_WARNING_OBJECT (self, "Too big raw CEA708 buffer");
break;
}
n = convert_cea708_cc_data_cea708_cdp_internal (self, cc_meta->data,
cc_meta->size, data, sizeof (data), tc_meta);
if (!gst_video_vbi_encoder_add_ancillary (self->vbiencoder, FALSE,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 >> 8,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 & 0xff, data, n))
GST_WARNING_OBJECT (self, "Couldn't add meta to ancillary data");
got_captions = TRUE;
break;
}
case GST_VIDEO_CAPTION_TYPE_CEA708_CDP:{
if (!gst_video_vbi_encoder_add_ancillary (self->vbiencoder,
FALSE,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 >> 8,
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 & 0xff, cc_meta->data,
cc_meta->size))
GST_WARNING_OBJECT (self, "Couldn't add meta to ancillary data");
got_captions = TRUE;
break;
}
default:{
GST_FIXME_OBJECT (self, "Caption type %d not supported",
cc_meta->caption_type);
break;
}
}
}
if (got_captions
&& self->output->output->CreateAncillaryData (format,
&vanc_frame) == S_OK) {
if (vanc_frame->GetBufferForVerticalBlankingLine (self->caption_line,
(void **) &vancdata) == S_OK) {
gst_video_vbi_encoder_write_line (self->vbiencoder, vancdata);
if (frame->SetAncillaryData (vanc_frame) != S_OK) {
GST_WARNING_OBJECT (self, "Failed to set ancillary data");
}
} else {
GST_WARNING_OBJECT (self,
"Failed to get buffer for line %d ancillary data",
self->caption_line);
}
vanc_frame->Release ();
} else if (got_captions) {
GST_WARNING_OBJECT (self, "Failed to allocate ancillary data frame");
}
}
gst_decklink_video_sink_convert_to_internal_clock (self, &running_time,
&running_time_duration);
GST_LOG_OBJECT (self, "Scheduling video frame %p at %" GST_TIME_FORMAT
" with duration %" GST_TIME_FORMAT, frame, GST_TIME_ARGS (running_time),
GST_TIME_ARGS (running_time_duration));
ret = self->output->output->ScheduleVideoFrame (frame,
running_time, running_time_duration, GST_SECOND);
if (ret != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to schedule frame: 0x%08lx", (unsigned long) ret));
flow_ret = GST_FLOW_ERROR;
goto out;
}
flow_ret = GST_FLOW_OK;
out:
frame->Release ();
return flow_ret;
}
static gboolean
gst_decklink_video_sink_open (GstBaseSink * bsink)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
const GstDecklinkMode *mode;
GST_DEBUG_OBJECT (self, "Starting");
self->output =
gst_decklink_acquire_nth_output (self->device_number,
GST_ELEMENT_CAST (self), FALSE);
if (!self->output) {
GST_ERROR_OBJECT (self, "Failed to acquire output");
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->output->lock);
self->output->mode = mode;
self->output->start_scheduled_playback =
gst_decklink_video_sink_start_scheduled_playback;
self->output->clock_start_time = GST_CLOCK_TIME_NONE;
self->output->clock_epoch += self->output->clock_last_time;
self->output->clock_last_time = 0;
self->output->clock_offset = 0;
GST_OBJECT_LOCK (self);
self->internal_base_time = GST_CLOCK_TIME_NONE;
self->external_base_time = GST_CLOCK_TIME_NONE;
GST_OBJECT_UNLOCK (self);
g_mutex_unlock (&self->output->lock);
return TRUE;
}
static gboolean
gst_decklink_video_sink_close (GstBaseSink * bsink)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
GST_DEBUG_OBJECT (self, "Closing");
if (self->output) {
g_mutex_lock (&self->output->lock);
self->output->mode = NULL;
self->output->video_enabled = FALSE;
if (self->output->start_scheduled_playback && self->output->videosink)
self->output->start_scheduled_playback (self->output->videosink);
g_mutex_unlock (&self->output->lock);
self->output->output->DisableVideoOutput ();
gst_decklink_release_nth_output (self->device_number,
GST_ELEMENT_CAST (self), FALSE);
self->output = NULL;
}
return TRUE;
}
static gboolean
gst_decklink_video_sink_stop (GstDecklinkVideoSink * self)
{
GST_DEBUG_OBJECT (self, "Stopping");
if (self->output && self->output->video_enabled) {
g_mutex_lock (&self->output->lock);
self->output->video_enabled = FALSE;
g_mutex_unlock (&self->output->lock);
self->output->output->DisableVideoOutput ();
self->output->output->SetScheduledFrameCompletionCallback (NULL);
}
if (self->vbiencoder) {
gst_video_vbi_encoder_free (self->vbiencoder);
self->vbiencoder = NULL;
self->anc_vformat = GST_VIDEO_FORMAT_UNKNOWN;
}
return TRUE;
}
static void
_wait_for_stop_notify (GstDecklinkVideoSink * self)
{
bool active = false;
self->output->output->IsScheduledPlaybackRunning (&active);
while (active) {
/* cause sometimes decklink stops without notifying us... */
guint64 wait_time = g_get_monotonic_time () + G_TIME_SPAN_SECOND;
if (!g_cond_wait_until (&self->output->cond, &self->output->lock,
wait_time))
GST_WARNING_OBJECT (self, "Failed to wait for stop notification");
self->output->output->IsScheduledPlaybackRunning (&active);
}
}
static void
gst_decklink_video_sink_start_scheduled_playback (GstElement * element)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (element);
GstClockTime start_time;
HRESULT res;
bool active;
// Check if we're already started
if (self->output->started) {
GST_DEBUG_OBJECT (self, "Already started");
return;
}
// Check if we're ready to start:
// we need video and audio enabled, if there is audio
// and both of the two elements need to be set to PLAYING already
if (!self->output->video_enabled) {
GST_DEBUG_OBJECT (self,
"Not starting scheduled playback yet: video not enabled yet!");
return;
}
if (self->output->audiosink && !self->output->audio_enabled) {
GST_DEBUG_OBJECT (self,
"Not starting scheduled playback yet: "
"have audio but not enabled yet!");
return;
}
if ((GST_STATE (self) < GST_STATE_PAUSED
&& GST_STATE_PENDING (self) < GST_STATE_PAUSED)
|| (self->output->audiosink &&
GST_STATE (self->output->audiosink) < GST_STATE_PAUSED
&& GST_STATE_PENDING (self->output->audiosink) < GST_STATE_PAUSED)) {
GST_DEBUG_OBJECT (self,
"Not starting scheduled playback yet: "
"Elements are not set to PAUSED yet");
return;
}
// Need to unlock to get the clock time
g_mutex_unlock (&self->output->lock);
start_time = gst_clock_get_internal_time (self->output->clock);
g_mutex_lock (&self->output->lock);
// Check if someone else started in the meantime
if (self->output->started) {
return;
}
active = false;
self->output->output->IsScheduledPlaybackRunning (&active);
if (active) {
GST_DEBUG_OBJECT (self, "Stopping scheduled playback");
self->output->started = FALSE;
res = self->output->output->StopScheduledPlayback (0, 0, 0);
if (res != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to stop scheduled playback: 0x%08lx",
(unsigned long) res));
return;
}
// Wait until scheduled playback actually stopped
_wait_for_stop_notify (self);
}
GST_DEBUG_OBJECT (self,
"Starting scheduled playback at %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
res =
self->output->output->StartScheduledPlayback (start_time,
GST_SECOND, 1.0);
if (res != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to start scheduled playback: 0x%08lx",
(unsigned long) res));
return;
}
self->output->started = TRUE;
}
static GstStateChangeReturn
gst_decklink_video_sink_stop_scheduled_playback (GstDecklinkVideoSink * self)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstClockTime start_time;
HRESULT res;
if (!self->output->started)
return ret;
start_time = gst_clock_get_internal_time (self->output->clock);
GST_DEBUG_OBJECT (self,
"Stopping scheduled playback at %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
g_mutex_lock (&self->output->lock);
self->output->started = FALSE;
res = self->output->output->StopScheduledPlayback (start_time, 0, GST_SECOND);
if (res != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to stop scheduled playback: 0x%08lx", (unsigned long)
res));
ret = GST_STATE_CHANGE_FAILURE;
} else {
// Wait until scheduled playback actually stopped
_wait_for_stop_notify (self);
}
g_mutex_unlock (&self->output->lock);
GST_OBJECT_LOCK (self);
self->internal_base_time = GST_CLOCK_TIME_NONE;
self->external_base_time = GST_CLOCK_TIME_NONE;
GST_OBJECT_UNLOCK (self);
return ret;
}
static GstStateChangeReturn
gst_decklink_video_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG_OBJECT (self, "changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
self->vbiencoder = NULL;
self->anc_vformat = GST_VIDEO_FORMAT_UNKNOWN;
self->cdp_hdr_sequence_cntr = 0;
g_mutex_lock (&self->output->lock);
self->output->clock_epoch += self->output->clock_last_time;
self->output->clock_last_time = 0;
self->output->clock_offset = 0;
g_mutex_unlock (&self->output->lock);
gst_element_post_message (element,
gst_message_new_clock_provide (GST_OBJECT_CAST (element),
self->output->clock, TRUE));
g_mutex_lock (&self->output->lock);
if (self->output->start_scheduled_playback)
self->output->start_scheduled_playback (self->output->videosink);
g_mutex_unlock (&self->output->lock);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
GstClock *clock;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
if (clock) {
if (clock != self->output->clock) {
gst_clock_set_master (self->output->clock, clock);
}
GST_OBJECT_LOCK (self);
if (self->external_base_time == GST_CLOCK_TIME_NONE || self->internal_base_time == GST_CLOCK_TIME_NONE) {
self->external_base_time = gst_clock_get_internal_time (clock);
self->internal_base_time = gst_clock_get_internal_time (self->output->clock);
self->internal_time_offset = self->internal_base_time;
}
GST_INFO_OBJECT (self, "clock has been set to %" GST_PTR_FORMAT
", updated base times - internal: %" GST_TIME_FORMAT
" external: %" GST_TIME_FORMAT " internal offset %"
GST_TIME_FORMAT, clock,
GST_TIME_ARGS (self->internal_base_time),
GST_TIME_ARGS (self->external_base_time),
GST_TIME_ARGS (self->internal_time_offset));
GST_OBJECT_UNLOCK (self);
gst_object_unref (clock);
} else {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Need a clock to go to PLAYING"));
ret = GST_STATE_CHANGE_FAILURE;
}
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (gst_decklink_video_sink_stop_scheduled_playback (self) ==
GST_STATE_CHANGE_FAILURE)
ret = GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
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:{
gst_element_post_message (element,
gst_message_new_clock_lost (GST_OBJECT_CAST (element),
self->output->clock));
gst_clock_set_master (self->output->clock, NULL);
// Reset calibration to make the clock reusable next time we use it
gst_clock_set_calibration (self->output->clock, 0, 0, 1, 1);
g_mutex_lock (&self->output->lock);
self->output->clock_epoch += self->output->clock_last_time;
self->output->clock_last_time = 0;
self->output->clock_offset = 0;
g_mutex_unlock (&self->output->lock);
gst_decklink_video_sink_stop (self);
GST_OBJECT_LOCK (self);
self->internal_base_time = GST_CLOCK_TIME_NONE;
self->external_base_time = GST_CLOCK_TIME_NONE;
GST_OBJECT_UNLOCK (self);
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:{
break;
}
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
default:
break;
}
return ret;
}
static gboolean
gst_decklink_video_sink_event (GstBaseSink * bsink, GstEvent * event)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
{
break;
}
case GST_EVENT_FLUSH_STOP:
{
gboolean reset_time;
gst_event_parse_flush_stop (event, &reset_time);
if (reset_time) {
GST_OBJECT_LOCK (self);
/* force a recalculation of clock base times */
self->external_base_time = GST_CLOCK_TIME_NONE;
self->internal_base_time = GST_CLOCK_TIME_NONE;
GST_OBJECT_UNLOCK (self);
}
break;
}
default:
break;
}
return GST_BASE_SINK_CLASS (parent_class)->event (bsink, event);
}
static GstClock *
gst_decklink_video_sink_provide_clock (GstElement * element)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (element);
if (!self->output)
return NULL;
return GST_CLOCK_CAST (gst_object_ref (self->output->clock));
}
static gboolean
gst_decklink_video_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query)
{
GstCaps *caps;
GstVideoInfo info;
GstBufferPool *pool;
guint size;
gst_query_parse_allocation (query, &caps, NULL);
if (caps == NULL)
return FALSE;
if (!gst_video_info_from_caps (&info, caps))
return FALSE;
size = GST_VIDEO_INFO_SIZE (&info);
if (gst_query_get_n_allocation_pools (query) == 0) {
GstStructure *structure;
GstAllocator *allocator = NULL;
GstAllocationParams params = { (GstMemoryFlags) 0, 15, 0, 0 };
if (gst_query_get_n_allocation_params (query) > 0)
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
else
gst_query_add_allocation_param (query, allocator, &params);
pool = gst_video_buffer_pool_new ();
structure = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (structure, caps, size, 0, 0);
gst_buffer_pool_config_set_allocator (structure, allocator, &params);
if (allocator)
gst_object_unref (allocator);
if (!gst_buffer_pool_set_config (pool, structure))
goto config_failed;
gst_query_add_allocation_pool (query, pool, size, 0, 0);
gst_object_unref (pool);
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
}
return TRUE;
// ERRORS
config_failed:
{
GST_ERROR_OBJECT (bsink, "failed to set config");
gst_object_unref (pool);
return FALSE;
}
}
Reference in a new issue View git blame Copy permalink