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decklink: Initial version of the audio/video sink rewrite

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This commit is contained in:
Sebastian Dröge 2014-12-13 17:23:31 +01:00
parent f9739870ce
commit 57d46fe9e1
7 changed files with 1468 additions and 51 deletions
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11
sys/decklink/Makefile.am
View file

@ -8,6 +8,7 @@ libgstdecklink_la_CPPFLAGS = \
$(DECKLINK_CXXFLAGS)
libgstdecklink_la_LIBADD = \
$(GST_PLUGINS_BASE_LIBS) \
-lgstaudio-@GST_API_VERSION@ \
-lgstvideo-@GST_API_VERSION@ \
$(GST_BASE_LIBS) \
$(GST_LIBS) \
@ -23,10 +24,9 @@ endif
libgstdecklink_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)
libgstdecklink_la_SOURCES = \
gstdecklinksink.cpp \
gstdecklinksrc.cpp \
gstdecklink.cpp \
capture.cpp
gstdecklinkaudiosink.cpp \
gstdecklinkvideosink.cpp
if DECKLINK_OSX
libgstdecklink_la_SOURCES += \
@ -38,9 +38,8 @@ endif
noinst_HEADERS = \
gstdecklink.h \
gstdecklinksrc.h \
gstdecklinksink.h \
capture.h \
gstdecklinkaudiosink.h \
gstdecklinkvideosink.h \
linux/DeckLinkAPIConfiguration.h \
linux/DeckLinkAPIDeckControl.h \
linux/DeckLinkAPIDiscovery.h \

243
sys/decklink/gstdecklink.cpp
View file

@ -1,5 +1,6 @@
/* GStreamer
* Copyright (C) 2011 David Schleef <ds@schleef.org>
* 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
@ -23,8 +24,11 @@
#include <gst/gst.h>
#include "gstdecklink.h"
#include "gstdecklinksrc.h"
#include "gstdecklinksink.h"
#include "gstdecklinkaudiosink.h"
#include "gstdecklinkvideosink.h"
GST_DEBUG_CATEGORY_STATIC (gst_decklink_debug);
#define GST_CAT_DEFAULT gst_decklink_debug
GType
gst_decklink_mode_get_type (void)
@ -199,56 +203,93 @@ gst_decklink_mode_get_template_caps (void)
return caps;
}
#define GST_TYPE_DECKLINK_CLOCK \
(gst_decklink_clock_get_type())
#define GST_DECKLINK_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECKLINK_CLOCK,GstDecklinkClock))
#define GST_DECKLINK_CLOCK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECKLINK_CLOCK,GstDecklinkClockClass))
#define GST_IS_Decklink_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECKLINK_CLOCK))
#define GST_IS_Decklink_CLOCK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECKLINK_CLOCK))
#define GST_DECKLINK_CLOCK_CAST(obj) \
((GstDecklinkClock*)(obj))
typedef struct _GstDecklinkClock GstDecklinkClock;
typedef struct _GstDecklinkClockClass GstDecklinkClockClass;
struct _GstDecklinkClock
{
GstSystemClock clock;
IDeckLinkInput *input;
IDeckLinkOutput *output;
};
struct _GstDecklinkClockClass
{
GstSystemClockClass parent_class;
};
GType gst_decklink_clock_get_type (void);
typedef struct _Device Device;
struct _Device
{
IDeckLink *decklink;
IDeckLinkInput *input;
IDeckLinkOutput *output;
IDeckLinkConfiguration *config;
GstDecklinkOutput output;
GstDecklinkInput input;
};
static GOnce devices_once = G_ONCE_INIT;
static int n_devices;
static Device devices[10];
static void
init_devices (void)
static gpointer
init_devices (gpointer data)
{
IDeckLinkIterator *iterator;
IDeckLink *decklink = NULL;
HRESULT ret;
int i;
static gboolean inited = FALSE;
if (inited)
return;
inited = TRUE;
iterator = CreateDeckLinkIteratorInstance ();
if (iterator == NULL) {
GST_ERROR ("no driver");
return;
return NULL;
}
i = 0;
ret = iterator->Next (&decklink);
while (ret == S_OK) {
devices[i].decklink = decklink;
ret = decklink->QueryInterface (IID_IDeckLinkInput,
(void **) &devices[i].input);
(void **) &devices[i].input.input);
if (ret != S_OK) {
GST_WARNING ("selected device does not have input interface");
} else {
devices[i].input.device = decklink;
devices[i].input.clock =
GST_CLOCK_CAST (g_object_new (GST_TYPE_DECKLINK_CLOCK, "name",
"GstDecklinkInputClock", NULL));
GST_DECKLINK_CLOCK_CAST (devices[i].input.clock)->input =
devices[i].input.input;
}
ret = decklink->QueryInterface (IID_IDeckLinkOutput,
(void **) &devices[i].output);
(void **) &devices[i].output.output);
if (ret != S_OK) {
GST_WARNING ("selected device does not have output interface");
} else {
devices[i].output.device = decklink;
devices[i].output.clock =
GST_CLOCK_CAST (g_object_new (GST_TYPE_DECKLINK_CLOCK, "name",
"GstDecklinkOutputClock", NULL));
GST_DECKLINK_CLOCK_CAST (devices[i].output.clock)->output =
devices[i].output.output;
}
ret = decklink->QueryInterface (IID_IDeckLinkConfiguration,
(void **) &devices[i].config);
(void **) &devices[i].input.config);
if (ret != S_OK) {
GST_WARNING ("selected device does not have config interface");
}
@ -265,46 +306,166 @@ init_devices (void)
n_devices = i;
iterator->Release ();
return NULL;
}
IDeckLink *
gst_decklink_get_nth_device (int n)
GstDecklinkOutput *
gst_decklink_acquire_nth_output (gint n, GstElement * sink, gboolean is_audio)
{
init_devices ();
return devices[n].decklink;
GstDecklinkOutput *output;
g_once (&devices_once, init_devices, NULL);
if (n >= n_devices)
return NULL;
output = &devices[n].output;
if (!output->output) {
GST_ERROR ("Device %d has no output", n);
return NULL;
}
g_mutex_lock (&output->lock);
if (is_audio && !output->audiosink) {
output->audiosink = GST_ELEMENT_CAST (gst_object_ref (sink));
g_mutex_unlock (&output->lock);
return output;
} else if (!output->videosink) {
output->videosink = GST_ELEMENT_CAST (gst_object_ref (sink));
g_mutex_unlock (&output->lock);
return output;
}
g_mutex_unlock (&output->lock);
GST_ERROR ("Output device %d (audio: %d) in use already", n, is_audio);
return NULL;
}
IDeckLinkInput *
gst_decklink_get_nth_input (int n)
void
gst_decklink_release_nth_output (gint n, GstElement * sink, gboolean is_audio)
{
init_devices ();
return devices[n].input;
GstDecklinkOutput *output;
if (n >= n_devices)
return;
output = &devices[n].output;
g_assert (output->output);
g_mutex_lock (&output->lock);
if (is_audio) {
g_assert (output->audiosink == sink);
gst_object_unref (sink);
output->audiosink = NULL;
} else {
g_assert (output->videosink == sink);
gst_object_unref (sink);
output->videosink = NULL;
}
g_mutex_unlock (&output->lock);
}
IDeckLinkOutput *
gst_decklink_get_nth_output (int n)
void
gst_decklink_output_set_audio_clock (GstDecklinkOutput * output,
GstClock * clock)
{
init_devices ();
return devices[n].output;
g_mutex_lock (&output->lock);
if (output->audio_clock)
gst_object_unref (output->audio_clock);
output->audio_clock = clock;
if (clock)
gst_object_ref (clock);
g_mutex_unlock (&output->lock);
}
IDeckLinkConfiguration *
gst_decklink_get_nth_config (int n)
GstClock *
gst_decklink_output_get_audio_clock (GstDecklinkOutput * output)
{
init_devices ();
return devices[n].config;
GstClock *ret = NULL;
g_mutex_lock (&output->lock);
if (output->audio_clock)
ret = GST_CLOCK_CAST (gst_object_ref (output->audio_clock));
g_mutex_unlock (&output->lock);
return ret;
}
G_DEFINE_TYPE (GstDecklinkClock, gst_decklink_clock, GST_TYPE_SYSTEM_CLOCK);
static void gst_decklink_clock_class_init (GstDecklinkClockClass * klass);
static void gst_decklink_clock_init (GstDecklinkClock * clock);
static GstClockTime gst_decklink_clock_get_internal_time (GstClock * clock);
static void
gst_decklink_clock_class_init (GstDecklinkClockClass * klass)
{
GstClockClass *clock_class = (GstClockClass *) klass;
clock_class->get_internal_time = gst_decklink_clock_get_internal_time;
}
static void
gst_decklink_clock_init (GstDecklinkClock * clock)
{
GST_OBJECT_FLAG_SET (clock, GST_CLOCK_FLAG_CAN_SET_MASTER);
}
GstDecklinkClock *
gst_decklink_clock_new (const gchar * name)
{
GstDecklinkClock *self =
GST_DECKLINK_CLOCK (g_object_new (GST_TYPE_DECKLINK_CLOCK, "name", name,
"clock-type", GST_CLOCK_TYPE_OTHER, NULL));
return self;
}
static GstClockTime
gst_decklink_clock_get_internal_time (GstClock * clock)
{
GstDecklinkClock *self = GST_DECKLINK_CLOCK (clock);
GstClockTime result;
BMDTimeValue time;
HRESULT ret;
GST_OBJECT_LOCK (clock);
if (self->input != NULL) {
ret =
self->input->GetHardwareReferenceClock (GST_SECOND, &time, NULL, NULL);
if (ret == S_OK && time >= 0)
result = time;
else
result = GST_CLOCK_TIME_NONE;
} else if (self->output != NULL) {
ret =
self->output->GetHardwareReferenceClock (GST_SECOND, &time, NULL, NULL);
if (ret == S_OK && time >= 0)
result = time;
else
result = GST_CLOCK_TIME_NONE;
} else {
result = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (clock);
GST_LOG_OBJECT (clock, "result %" GST_TIME_FORMAT, GST_TIME_ARGS (result));
return result;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_decklink_debug, "decklink", 0,
"debug category for decklink plugin");
gst_element_register (plugin, "decklinksrc", GST_RANK_NONE,
gst_decklink_src_get_type ());
gst_element_register (plugin, "decklinksink", GST_RANK_NONE,
gst_decklink_sink_get_type ());
gst_element_register (plugin, "decklinkaudiosink", GST_RANK_NONE,
GST_TYPE_DECKLINK_AUDIO_SINK);
gst_element_register (plugin, "decklinkvideosink", GST_RANK_NONE,
GST_TYPE_DECKLINK_VIDEO_SINK);
return TRUE;
}

45
sys/decklink/gstdecklink.h
View file

@ -1,5 +1,6 @@
/* GStreamer
* Copyright (C) 2011 David Schleef <ds@schleef.org>
* 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
@ -111,9 +112,45 @@ const GstDecklinkMode * gst_decklink_get_mode (GstDecklinkModeEnum e);
GstCaps * gst_decklink_mode_get_caps (GstDecklinkModeEnum e);
GstCaps * gst_decklink_mode_get_template_caps (void);
IDeckLink * gst_decklink_get_nth_device (int n);
IDeckLinkInput * gst_decklink_get_nth_input (int n);
IDeckLinkOutput * gst_decklink_get_nth_output (int n);
IDeckLinkConfiguration * gst_decklink_get_nth_config (int n);
typedef struct _GstDecklinkOutput GstDecklinkOutput;
struct _GstDecklinkOutput {
IDeckLink *device;
IDeckLinkOutput *output;
GstClock *clock;
/* Everything below protected by mutex */
GMutex lock;
/* Set by the audio sink */
GstClock *audio_clock;
/* <private> */
GstElement *audiosink;
GstElement *videosink;
};
typedef struct _GstDecklinkInput GstDecklinkInput;
struct _GstDecklinkInput {
IDeckLink *device;
IDeckLinkInput *input;
IDeckLinkConfiguration *config;
GstClock *clock;
/* Everything below protected by mutex */
GMutex lock;
/* Set by the audio source */
GstClock *audio_clock;
/* <private> */
GstElement *audiosrc;
GstElement *videosrc;
};
GstDecklinkOutput * gst_decklink_acquire_nth_output (gint n, GstElement * sink, gboolean is_audio);
void gst_decklink_release_nth_output (gint n, GstElement * sink, gboolean is_audio);
void gst_decklink_output_set_audio_clock (GstDecklinkOutput * output, GstClock * clock);
GstClock * gst_decklink_output_get_audio_clock (GstDecklinkOutput * output);
#endif

561
sys/decklink/gstdecklinkaudiosink.cpp Normal file
View file

@ -0,0 +1,561 @@
/* 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 "gstdecklinkaudiosink.h"
GST_DEBUG_CATEGORY_STATIC (gst_decklink_audio_sink_debug);
#define GST_CAT_DEFAULT gst_decklink_audio_sink_debug
// Ringbuffer implementation
#define GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER \
(gst_decklink_audio_sink_ringbuffer_get_type())
#define GST_DECKLINK_AUDIO_SINK_RING_BUFFER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER,GstDecklinkAudioSinkRingBuffer))
#define GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST(obj) \
((GstDecklinkAudioSinkRingBuffer*) obj)
#define GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER,GstDecklinkAudioSinkRingBufferClass))
#define GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER,GstDecklinkAudioSinkRingBufferClass))
#define GST_IS_DECKLINK_AUDIO_SINK_RING_BUFFER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER))
#define GST_IS_DECKLINK_AUDIO_SINK_RING_BUFFER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER))
typedef struct _GstDecklinkAudioSinkRingBuffer GstDecklinkAudioSinkRingBuffer;
typedef struct _GstDecklinkAudioSinkRingBufferClass
GstDecklinkAudioSinkRingBufferClass;
struct _GstDecklinkAudioSinkRingBuffer
{
GstAudioRingBuffer object;
GstDecklinkOutput *output;
GstDecklinkAudioSink *sink;
};
struct _GstDecklinkAudioSinkRingBufferClass
{
GstAudioRingBufferClass parent_class;
};
GType gst_decklink_audio_sink_ringbuffer_get_type (void);
static void gst_decklink_audio_sink_ringbuffer_finalize (GObject * object);
static void gst_decklink_audio_sink_ringbuffer_clear_all (GstAudioRingBuffer *
rb);
static guint gst_decklink_audio_sink_ringbuffer_delay (GstAudioRingBuffer * rb);
static gboolean gst_decklink_audio_sink_ringbuffer_start (GstAudioRingBuffer *
rb);
static gboolean gst_decklink_audio_sink_ringbuffer_pause (GstAudioRingBuffer *
rb);
static gboolean gst_decklink_audio_sink_ringbuffer_stop (GstAudioRingBuffer *
rb);
static gboolean gst_decklink_audio_sink_ringbuffer_acquire (GstAudioRingBuffer *
rb, GstAudioRingBufferSpec * spec);
static gboolean gst_decklink_audio_sink_ringbuffer_release (GstAudioRingBuffer *
rb);
static gboolean
gst_decklink_audio_sink_ringbuffer_open_device (GstAudioRingBuffer * rb);
static gboolean
gst_decklink_audio_sink_ringbuffer_close_device (GstAudioRingBuffer * rb);
#define ringbuffer_parent_class gst_decklink_audio_sink_ringbuffer_parent_class
G_DEFINE_TYPE (GstDecklinkAudioSinkRingBuffer,
gst_decklink_audio_sink_ringbuffer, GST_TYPE_AUDIO_RING_BUFFER);
static void
gst_decklink_audio_sink_ringbuffer_class_init
(GstDecklinkAudioSinkRingBufferClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstAudioRingBufferClass *gstringbuffer_class =
GST_AUDIO_RING_BUFFER_CLASS (klass);
gobject_class->finalize = gst_decklink_audio_sink_ringbuffer_finalize;
gstringbuffer_class->open_device =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_open_device);
gstringbuffer_class->close_device =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_close_device);
gstringbuffer_class->acquire =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_acquire);
gstringbuffer_class->release =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_release);
gstringbuffer_class->start =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_start);
gstringbuffer_class->pause =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_pause);
gstringbuffer_class->resume =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_start);
gstringbuffer_class->stop =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_stop);
gstringbuffer_class->delay =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_delay);
gstringbuffer_class->clear_all =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_ringbuffer_clear_all);
}
static void
gst_decklink_audio_sink_ringbuffer_init (GstDecklinkAudioSinkRingBuffer * self)
{
}
static void
gst_decklink_audio_sink_ringbuffer_finalize (GObject * object)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (object);
gst_object_unref (self->sink);
self->sink = NULL;
G_OBJECT_CLASS (ringbuffer_parent_class)->finalize (object);
}
class GStreamerAudioOutputCallback:public IDeckLinkAudioOutputCallback
{
public:
GStreamerAudioOutputCallback (GstDecklinkAudioSinkRingBuffer * ringbuffer)
{
m_ringbuffer =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (gst_object_ref (ringbuffer));
g_mutex_init (&m_mutex);
}
virtual HRESULT QueryInterface (REFIID, LPVOID *)
{
return E_NOINTERFACE;
}
virtual ULONG AddRef (void)
{
ULONG ret;
g_mutex_lock (&m_mutex);
m_refcount++;
ret = m_refcount;
g_mutex_unlock (&m_mutex);
return ret;
}
virtual ULONG 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 ~ GStreamerAudioOutputCallback () {
gst_object_unref (m_ringbuffer);
g_mutex_clear (&m_mutex);
}
virtual HRESULT RenderAudioSamples (bool preroll)
{
guint8 *ptr;
gint seg;
gint len;
gint bpf;
guint written, written_sum;
HRESULT res;
GST_LOG_OBJECT (m_ringbuffer->sink, "Writing audio samples (preroll: %d)",
preroll);
if (!gst_audio_ring_buffer_prepare_read (GST_AUDIO_RING_BUFFER_CAST
(m_ringbuffer), &seg, &ptr, &len)) {
GST_WARNING_OBJECT (m_ringbuffer->sink, "No segment available");
return E_FAIL;
}
bpf =
GST_AUDIO_INFO_BPF (&GST_AUDIO_RING_BUFFER_CAST (m_ringbuffer)->
spec.info);
len /= bpf;
GST_LOG_OBJECT (m_ringbuffer->sink,
"Write audio samples: %p size %d segment: %d", ptr, len, seg);
written_sum = 0;
do {
res =
m_ringbuffer->output->output->ScheduleAudioSamples (ptr, len,
0, 0, &written);
len -= written;
ptr += written * bpf;
written_sum += written;
} while (len > 0 && res == S_OK);
GST_LOG_OBJECT (m_ringbuffer->sink, "Wrote %u samples: 0x%08x", written_sum,
res);
gst_audio_ring_buffer_clear (GST_AUDIO_RING_BUFFER_CAST (m_ringbuffer),
seg);
gst_audio_ring_buffer_advance (GST_AUDIO_RING_BUFFER_CAST (m_ringbuffer),
1);
return res;
}
private:
GstDecklinkAudioSinkRingBuffer * m_ringbuffer;
GMutex m_mutex;
gint m_refcount;
};
static void
gst_decklink_audio_sink_ringbuffer_clear_all (GstAudioRingBuffer * rb)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
GST_DEBUG_OBJECT (self->sink, "Flushing");
if (self->output)
self->output->output->FlushBufferedAudioSamples ();
}
static guint
gst_decklink_audio_sink_ringbuffer_delay (GstAudioRingBuffer * rb)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
guint ret = 0;
if (self->output) {
if (self->output->output->GetBufferedAudioSampleFrameCount (&ret) != S_OK)
ret = 0;
}
GST_DEBUG_OBJECT (self->sink, "Delay: %u", ret);
return ret;
}
static gboolean
in_same_pipeline (GstElement * a, GstElement * b)
{
GstObject *root = NULL, *tmp;
gboolean ret = FALSE;
tmp = gst_object_get_parent (GST_OBJECT_CAST (a));
while (tmp != NULL) {
if (root)
gst_object_unref (root);
root = tmp;
tmp = gst_object_get_parent (root);
}
ret = root && gst_object_has_ancestor (GST_OBJECT_CAST (b), root);
if (root)
gst_object_unref (root);
return ret;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_start (GstAudioRingBuffer * rb)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
GstElement *videosink = NULL;
gboolean ret = TRUE;
// Check if there is a video sink for this output too and if it
// is actually in the same pipeline
g_mutex_lock (&self->output->lock);
if (self->output->videosink)
videosink = GST_ELEMENT_CAST (gst_object_ref (self->output->videosink));
g_mutex_unlock (&self->output->lock);
if (!videosink) {
GST_ELEMENT_ERROR (self->sink, STREAM, FAILED,
(NULL), ("Audio sink needs a video sink for its operation"));
ret = FALSE;
} else if (!in_same_pipeline (GST_ELEMENT_CAST (self->sink), videosink)) {
GST_ELEMENT_ERROR (self->sink, STREAM, FAILED,
(NULL), ("Audio sink and video sink need to be in the same pipeline"));
ret = FALSE;
}
if (videosink)
gst_object_unref (videosink);
return ret;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_pause (GstAudioRingBuffer * rb)
{
return TRUE;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_stop (GstAudioRingBuffer * rb)
{
return TRUE;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_acquire (GstAudioRingBuffer * rb,
GstAudioRingBufferSpec * spec)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
HRESULT ret;
BMDAudioSampleType sample_depth;
GST_DEBUG_OBJECT (self->sink, "Acquire");
if (spec->info.finfo->format == GST_AUDIO_FORMAT_S16LE) {
sample_depth = bmdAudioSampleType16bitInteger;
} else {
sample_depth = bmdAudioSampleType32bitInteger;
}
ret = self->output->output->EnableAudioOutput (bmdAudioSampleRate48kHz,
sample_depth, 2, bmdAudioOutputStreamContinuous);
if (ret != S_OK) {
GST_WARNING_OBJECT (self->sink, "Failed to enable audio output 0x%08x",
ret);
return FALSE;
}
ret =
self->output->
output->SetAudioCallback (new GStreamerAudioOutputCallback (self));
if (ret != S_OK) {
GST_WARNING_OBJECT (self->sink,
"Failed to set audio output callback 0x%08x", ret);
return FALSE;
}
spec->segsize =
(spec->latency_time * GST_AUDIO_INFO_RATE (&spec->info) /
G_USEC_PER_SEC) * GST_AUDIO_INFO_BPF (&spec->info);
spec->segtotal = spec->buffer_time / spec->latency_time;
// set latency to one more segment as we need some headroom
spec->seglatency = spec->segtotal + 1;
rb->size = spec->segtotal * spec->segsize;
rb->memory = (guint8 *) g_malloc0 (rb->size);
return TRUE;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_release (GstAudioRingBuffer * rb)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
GST_DEBUG_OBJECT (self->sink, "Release");
if (self->output)
self->output->output->DisableAudioOutput ();
// free the buffer
g_free (rb->memory);
rb->memory = NULL;
return TRUE;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_open_device (GstAudioRingBuffer * rb)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
GST_DEBUG_OBJECT (self->sink, "Open device");
self->output =
gst_decklink_acquire_nth_output (self->sink->device_number,
GST_ELEMENT_CAST (self), TRUE);
if (!self->output) {
GST_ERROR_OBJECT (self, "Failed to acquire output");
return FALSE;
}
gst_decklink_output_set_audio_clock (self->output,
GST_AUDIO_BASE_SINK_CAST (self->sink)->provided_clock);
return TRUE;
}
static gboolean
gst_decklink_audio_sink_ringbuffer_close_device (GstAudioRingBuffer * rb)
{
GstDecklinkAudioSinkRingBuffer *self =
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (rb);
GST_DEBUG_OBJECT (self->sink, "Close device");
if (self->output) {
gst_decklink_output_set_audio_clock (self->output, NULL);
gst_decklink_release_nth_output (self->sink->device_number,
GST_ELEMENT_CAST (self), TRUE);
self->output = NULL;
}
return TRUE;
}
enum
{
PROP_0,
PROP_MODE,
PROP_DEVICE_NUMBER
};
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS
("audio/x-raw, format={S16LE,S32LE}, channels=2, rate=48000, "
"layout=interleaved")
);
static void gst_decklink_audio_sink_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_decklink_audio_sink_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_decklink_audio_sink_finalize (GObject * object);
static GstAudioRingBuffer
* gst_decklink_audio_sink_create_ringbuffer (GstAudioBaseSink * absink);
#define parent_class gst_decklink_audio_sink_parent_class
G_DEFINE_TYPE (GstDecklinkAudioSink, gst_decklink_audio_sink,
GST_TYPE_AUDIO_BASE_SINK);
static void
gst_decklink_audio_sink_class_init (GstDecklinkAudioSinkClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstAudioBaseSinkClass *audiobasesink_class =
GST_AUDIO_BASE_SINK_CLASS (klass);
gobject_class->set_property = gst_decklink_audio_sink_set_property;
gobject_class->get_property = gst_decklink_audio_sink_get_property;
gobject_class->finalize = gst_decklink_audio_sink_finalize;
audiobasesink_class->create_ringbuffer =
GST_DEBUG_FUNCPTR (gst_decklink_audio_sink_create_ringbuffer);
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)));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_static_metadata (element_class, "Decklink Audio Sink",
"Audio/Sink", "Decklink Sink", "David Schleef <ds@entropywave.com>, "
"Sebastian Dröge <sebastian@centricular.com>");
GST_DEBUG_CATEGORY_INIT (gst_decklink_audio_sink_debug, "decklinkaudiosink",
0, "debug category for decklinkaudiosink element");
}
static void
gst_decklink_audio_sink_init (GstDecklinkAudioSink * self)
{
self->device_number = 0;
// 25ms latency time seems to be needed at least,
// everything below can cause drop-outs
GST_AUDIO_BASE_SINK_CAST (self)->latency_time = 25000;
}
void
gst_decklink_audio_sink_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstDecklinkAudioSink *self = GST_DECKLINK_AUDIO_SINK_CAST (object);
switch (property_id) {
case PROP_DEVICE_NUMBER:
self->device_number = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_audio_sink_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstDecklinkAudioSink *self = GST_DECKLINK_AUDIO_SINK_CAST (object);
switch (property_id) {
case PROP_DEVICE_NUMBER:
g_value_set_int (value, self->device_number);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_decklink_audio_sink_finalize (GObject * object)
{
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstAudioRingBuffer *
gst_decklink_audio_sink_create_ringbuffer (GstAudioBaseSink * absink)
{
GstAudioRingBuffer *ret;
GST_DEBUG_OBJECT (absink, "Creating ringbuffer");
ret =
GST_AUDIO_RING_BUFFER_CAST (g_object_new
(GST_TYPE_DECKLINK_AUDIO_SINK_RING_BUFFER, NULL));
GST_DECKLINK_AUDIO_SINK_RING_BUFFER_CAST (ret)->sink =
(GstDecklinkAudioSink *) gst_object_ref (absink);
return ret;
}

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sys/decklink/gstdecklinkaudiosink.h Normal file
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/* GStreamer
*
* Copyright (C) 2011 David Schleef <ds@schleef.org>
* 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 St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_DECKLINK_AUDIO_SINK_H__
#define __GST_DECKLINK_AUDIO_SINK_H__
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstdecklink.h"
G_BEGIN_DECLS
#define GST_TYPE_DECKLINK_AUDIO_SINK \
(gst_decklink_audio_sink_get_type())
#define GST_DECKLINK_AUDIO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_DECKLINK_AUDIO_SINK, GstDecklinkAudioSink))
#define GST_DECKLINK_AUDIO_SINK_CAST(obj) \
((GstDecklinkAudioSink*)obj)
#define GST_DECKLINK_AUDIO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_DECKLINK_AUDIO_SINK, GstDecklinkAudioSinkClass))
#define GST_IS_DECKLINK_AUDIO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_DECKLINK_AUDIO_SINK))
#define GST_IS_DECKLINK_AUDIO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_DECKLINK_AUDIO_SINK))
typedef struct _GstDecklinkAudioSink GstDecklinkAudioSink;
typedef struct _GstDecklinkAudioSinkClass GstDecklinkAudioSinkClass;
struct _GstDecklinkAudioSink
{
GstAudioBaseSink parent;
GstDecklinkModeEnum mode;
gint device_number;
};
struct _GstDecklinkAudioSinkClass
{
GstAudioBaseSinkClass parent_class;
};
GType gst_decklink_audio_sink_get_type (void);
G_END_DECLS
#endif /* __GST_DECKLINK_AUDIO_SINK_H__ */

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/* 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
enum
{
PROP_0,
PROP_MODE,
PROP_DEVICE_NUMBER
};
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 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_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
#define parent_class gst_decklink_video_sink_parent_class
G_DEFINE_TYPE (GstDecklinkVideoSink, gst_decklink_video_sink,
GST_TYPE_BASE_SINK);
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->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);
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)));
templ_caps = gst_decklink_mode_get_template_caps ();
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;
}
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;
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;
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 GstCaps *
gst_decklink_video_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
GstCaps *mode_caps, *caps;
mode_caps = gst_decklink_mode_get_caps (self->mode);
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;
}
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, running_time, running_time_duration;
gint i;
GstClock *clock = NULL, *audio_clock = NULL;
GST_DEBUG_OBJECT (self, "Preparing buffer %p", buffer);
// FIXME: Handle no timestamps
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
return GST_FLOW_ERROR;
}
ret = self->output->output->CreateVideoFrame (self->info.width,
self->info.height, self->info.stride[0], bmdFormat8BitYUV,
bmdFrameFlagDefault, &frame);
if (ret != S_OK) {
GST_ELEMENT_ERROR (self, STREAM, FAILED,
(NULL), ("Failed to create video frame: 0x%08x", 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);
for (i = 0; i < self->info.height; i++) {
memcpy (outdata, indata, GST_VIDEO_FRAME_WIDTH (&vframe) * 2);
indata += GST_VIDEO_FRAME_PLANE_STRIDE (&vframe, 0);
outdata += frame->GetRowBytes ();
}
gst_video_frame_unmap (&vframe);
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;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
audio_clock = gst_decklink_output_get_audio_clock (self->output);
if (clock && clock != self->output->clock && clock != audio_clock) {
// TODO: Adjust time if pipeline clock is not our clock
//g_assert_not_reached ();
}
GST_LOG_OBJECT (self, "Scheduling video frame at %" GST_TIME_FORMAT
" with duration %" GST_TIME_FORMAT, 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%08x", ret));
flow_ret = GST_FLOW_ERROR;
goto out;
}
flow_ret = GST_FLOW_OK;
out:
if (clock)
gst_object_unref (clock);
if (audio_clock)
gst_object_unref (audio_clock);
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;
GstCaps *caps;
HRESULT ret;
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;
}
mode = gst_decklink_get_mode (self->mode);
g_assert (mode != NULL);
ret = self->output->output->EnableVideoOutput (mode->mode,
bmdVideoOutputFlagDefault);
if (ret != S_OK) {
GST_WARNING_OBJECT (self, "Failed to enable video output");
gst_decklink_release_nth_output (self->device_number,
GST_ELEMENT_CAST (self), FALSE);
return FALSE;
}
caps = gst_decklink_mode_get_caps (self->mode);
gst_video_info_from_caps (&self->info, caps);
gst_caps_unref (caps);
return TRUE;
}
static gboolean
gst_decklink_video_sink_close (GstBaseSink * bsink)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (bsink);
GST_DEBUG_OBJECT (self, "Stopping");
if (self->output) {
self->output->output->DisableVideoOutput ();
gst_decklink_release_nth_output (self->device_number,
GST_ELEMENT_CAST (self), FALSE);
self->output = NULL;
}
return TRUE;
}
static GstStateChangeReturn
gst_decklink_video_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstDecklinkVideoSink *self = GST_DECKLINK_VIDEO_SINK_CAST (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_element_post_message (element,
gst_message_new_clock_provide (GST_OBJECT_CAST (element),
self->output->clock, TRUE));
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
GstClock *clock, *audio_clock;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
audio_clock = gst_decklink_output_get_audio_clock (self->output);
if (clock && clock != self->output->clock && clock != audio_clock) {
gst_clock_set_master (self->output->clock, clock);
}
if (clock)
gst_object_unref (clock);
if (audio_clock)
gst_object_unref (audio_clock);
break;
}
default:
break;
}
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);
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:{
GstClockTime start_time = gst_element_get_start_time (element);
HRESULT res;
GstClock *clock, *audio_clock;
// FIXME: This will probably not work
if (start_time == GST_CLOCK_TIME_NONE)
start_time = 0;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
audio_clock = gst_decklink_output_get_audio_clock (self->output);
if (clock && clock != self->output->clock && clock != audio_clock) {
// TODO: Adjust time if pipeline clock is not our clock
//g_assert_not_reached ();
}
if (clock)
gst_object_unref (clock);
if (audio_clock)
gst_object_unref (audio_clock);
// The start time is now the running time when we stopped
// playback
GST_DEBUG_OBJECT (self,
"Stopping scheduled playback at %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
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%08x", res));
ret = GST_STATE_CHANGE_FAILURE;
}
break;
}
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:{
GstClockTime start_time = gst_element_get_start_time (element);
HRESULT res;
GstClock *clock, *audio_clock;
// FIXME: This will probably not work
if (start_time == GST_CLOCK_TIME_NONE)
start_time = 0;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
audio_clock = gst_decklink_output_get_audio_clock (self->output);
if (clock && clock != self->output->clock && clock != audio_clock) {
// TODO: Adjust time if pipeline clock is not our clock
//g_assert_not_reached ();
}
if (clock)
gst_object_unref (clock);
if (audio_clock)
gst_object_unref (audio_clock);
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%08x", res));
ret = GST_STATE_CHANGE_FAILURE;
}
break;
}
default:
break;
}
return ret;
}
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;
}
}

69
sys/decklink/gstdecklinkvideosink.h Normal file
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@ -0,0 +1,69 @@
/* GStreamer
*
* Copyright (C) 2011 David Schleef <ds@schleef.org>
* 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 St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_DECKLINK_VIDEO_SINK_H__
#define __GST_DECKLINK_VIDEO_SINK_H__
#include <gst/gst.h>
#include <gst/base/base.h>
#include <gst/video/video.h>
#include "gstdecklink.h"
G_BEGIN_DECLS
#define GST_TYPE_DECKLINK_VIDEO_SINK \
(gst_decklink_video_sink_get_type())
#define GST_DECKLINK_VIDEO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_DECKLINK_VIDEO_SINK, GstDecklinkVideoSink))
#define GST_DECKLINK_VIDEO_SINK_CAST(obj) \
((GstDecklinkVideoSink*)obj)
#define GST_DECKLINK_VIDEO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_DECKLINK_VIDEO_SINK, GstDecklinkVideoSinkClass))
#define GST_IS_DECKLINK_VIDEO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_DECKLINK_VIDEO_SINK))
#define GST_IS_DECKLINK_VIDEO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_DECKLINK_VIDEO_SINK))
typedef struct _GstDecklinkVideoSink GstDecklinkVideoSink;
typedef struct _GstDecklinkVideoSinkClass GstDecklinkVideoSinkClass;
struct _GstDecklinkVideoSink
{
GstBaseSink parent;
GstDecklinkModeEnum mode;
gint device_number;
GstVideoInfo info;
GstDecklinkOutput *output;
};
struct _GstDecklinkVideoSinkClass
{
GstBaseSinkClass parent_class;
};
GType gst_decklink_video_sink_get_type (void);
G_END_DECLS
#endif /* __GST_DECKLINK_VIDEO_SINK_H__ */