gstreamer/sys/applemedia/celvideosrc.c
2013-02-16 02:51:52 +01:00

881 lines
23 KiB
C

/*
* Copyright (C) 2010 Ole André Vadla Ravnås <oleavr@soundrop.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.
*/
#include "celvideosrc.h"
#include "coremediabuffer.h"
#include <gst/video/video.h>
#define DEFAULT_DEVICE_INDEX -1
#define DEFAULT_DO_STATS FALSE
#define QUEUE_READY_LOCK(instance) GST_OBJECT_LOCK (instance)
#define QUEUE_READY_UNLOCK(instance) GST_OBJECT_UNLOCK (instance)
#define QUEUE_READY_WAIT(instance) \
g_cond_wait (instance->ready_cond, GST_OBJECT_GET_LOCK (instance))
#define QUEUE_READY_NOTIFY(instance) g_cond_signal (instance->ready_cond)
GST_DEBUG_CATEGORY (gst_cel_video_src_debug);
#define GST_CAT_DEFAULT gst_cel_video_src_debug
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("NV12") ";"
GST_VIDEO_CAPS_YUV ("YUY2"))
);
enum
{
PROP_0,
PROP_DEVICE_INDEX,
PROP_DO_STATS,
PROP_FPS
};
typedef struct
{
guint index;
GstVideoFormat video_format;
guint32 fourcc;
gint width;
gint height;
gint fps_n;
gint fps_d;
} GstCelVideoFormat;
static gboolean gst_cel_video_src_open_device (GstCelVideoSrc * self);
static void gst_cel_video_src_close_device (GstCelVideoSrc * self);
static void gst_cel_video_src_ensure_device_caps_and_formats
(GstCelVideoSrc * self);
static void gst_cel_video_src_release_device_caps_and_formats
(GstCelVideoSrc * self);
static gboolean gst_cel_video_src_select_format (GstCelVideoSrc * self,
GstCelVideoFormat * format);
static gboolean gst_cel_video_src_parse_stream_format
(GstCelVideoSrc * self, guint index, CFDictionaryRef stream_format,
GstCelVideoFormat * format);
static OSStatus gst_cel_video_src_set_stream_property_i32
(GstCelVideoSrc * self, CFStringRef name, SInt32 value);
static OSStatus gst_cel_video_src_set_stream_property_value
(GstCelVideoSrc * self, CFStringRef name, CFTypeRef value);
static GstPushSrcClass *parent_class;
GST_BOILERPLATE (GstCelVideoSrc, gst_cel_video_src, GstPushSrc,
GST_TYPE_PUSH_SRC);
static void
gst_cel_video_src_init (GstCelVideoSrc * self, GstCelVideoSrcClass * gclass)
{
GstBaseSrc *base_src = GST_BASE_SRC_CAST (self);
gst_base_src_set_live (base_src, TRUE);
gst_base_src_set_format (base_src, GST_FORMAT_TIME);
self->ready_cond = g_cond_new ();
}
static void
gst_cel_video_src_dispose (GObject * object)
{
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_cel_video_src_finalize (GObject * object)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (object);
g_cond_free (self->ready_cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_cel_video_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (object);
switch (prop_id) {
case PROP_DEVICE_INDEX:
g_value_set_int (value, self->device_index);
break;
case PROP_DO_STATS:
g_value_set_boolean (value, self->do_stats);
break;
case PROP_FPS:
GST_OBJECT_LOCK (object);
g_value_set_int (value, self->fps);
GST_OBJECT_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_cel_video_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (object);
switch (prop_id) {
case PROP_DEVICE_INDEX:
self->device_index = g_value_get_int (value);
break;
case PROP_DO_STATS:
self->do_stats = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_cel_video_src_change_state (GstElement * element, GstStateChange transition)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_cel_video_src_open_device (self))
goto open_failed;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_cel_video_src_close_device (self);
break;
default:
break;
}
return ret;
/* ERRORS */
open_failed:
{
return GST_STATE_CHANGE_FAILURE;
}
}
static GstCaps *
gst_cel_video_src_get_caps (GstBaseSrc * basesrc)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (basesrc);
GstCaps *result;
if (self->device != NULL) {
gst_cel_video_src_ensure_device_caps_and_formats (self);
result = gst_caps_ref (self->device_caps);
} else {
result = NULL;
}
if (result != NULL) {
gchar *str;
str = gst_caps_to_string (result);
GST_DEBUG_OBJECT (self, "returning: %s", str);
g_free (str);
}
return result;
}
static gboolean
gst_cel_video_src_set_caps (GstBaseSrc * basesrc, GstCaps * caps)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (basesrc);
GstVideoFormat video_format;
gint width, height, fps_n, fps_d;
guint i;
GstCelVideoFormat *selected_format;
if (self->device == NULL)
goto no_device;
if (!gst_video_format_parse_caps (caps, &video_format, &width, &height))
goto invalid_format;
if (!gst_video_parse_caps_framerate (caps, &fps_n, &fps_d))
goto invalid_format;
gst_cel_video_src_ensure_device_caps_and_formats (self);
selected_format = NULL;
for (i = 0; i != self->device_formats->len; i++) {
GstCelVideoFormat *format;
format = &g_array_index (self->device_formats, GstCelVideoFormat, i);
if (format->video_format == video_format &&
format->width == width && format->height == height &&
format->fps_n == fps_n && format->fps_d == fps_d) {
selected_format = format;
break;
}
}
if (selected_format == NULL)
goto invalid_format;
GST_DEBUG_OBJECT (self, "selecting format %u", selected_format->index);
if (!gst_cel_video_src_select_format (self, selected_format))
goto select_failed;
gst_cel_video_src_release_device_caps_and_formats (self);
return TRUE;
/* ERRORS */
no_device:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("no device"), (NULL));
return FALSE;
}
invalid_format:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("invalid format"), (NULL));
return FALSE;
}
select_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("failed to select format"),
(NULL));
return FALSE;
}
}
static gboolean
gst_cel_video_src_start (GstBaseSrc * basesrc)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (basesrc);
g_atomic_int_set (&self->is_running, TRUE);
self->offset = 0;
self->last_sampling = GST_CLOCK_TIME_NONE;
self->count = 0;
self->fps = -1;
return TRUE;
}
static gboolean
gst_cel_video_src_stop (GstBaseSrc * basesrc)
{
return TRUE;
}
static gboolean
gst_cel_video_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (basesrc);
gboolean result = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
if (self->device == NULL || !GST_CLOCK_TIME_IS_VALID (self->duration))
goto beach;
min_latency = max_latency = self->duration;
GST_DEBUG_OBJECT (self, "reporting latency of min %" GST_TIME_FORMAT
" max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
result = TRUE;
break;
}
default:
result = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
break;
}
beach:
return result;
}
static gboolean
gst_cel_video_src_unlock (GstBaseSrc * basesrc)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (basesrc);
g_atomic_int_set (&self->is_running, FALSE);
QUEUE_READY_LOCK (self);
QUEUE_READY_NOTIFY (self);
QUEUE_READY_UNLOCK (self);
return TRUE;
}
static gboolean
gst_cel_video_src_unlock_stop (GstBaseSrc * basesrc)
{
return TRUE;
}
static void
gst_cel_video_src_on_queue_ready (void *triggerRefcon,
CMBufferQueueTriggerToken triggerToken)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (triggerRefcon);
QUEUE_READY_LOCK (self);
self->queue_is_ready = TRUE;
QUEUE_READY_NOTIFY (self);
QUEUE_READY_UNLOCK (self);
}
static void
gst_cel_video_src_timestamp_buffer (GstCelVideoSrc * self, GstBuffer * buf)
{
GstClock *clock;
GstClockTime ts;
GST_OBJECT_LOCK (self);
if ((clock = GST_ELEMENT_CLOCK (self)) != NULL) {
ts = gst_clock_get_time (clock);
if (ts > GST_ELEMENT (self)->base_time)
ts -= GST_ELEMENT (self)->base_time;
else
ts = 0;
if (ts > self->duration)
ts -= self->duration;
else
ts = 0;
} else {
ts = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (self);
GST_BUFFER_OFFSET (buf) = self->offset;
GST_BUFFER_OFFSET_END (buf) = self->offset + 1;
GST_BUFFER_TIMESTAMP (buf) = ts;
GST_BUFFER_DURATION (buf) = self->duration;
if (self->offset == 0)
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
self->offset++;
}
static void
gst_cel_video_src_update_statistics (GstCelVideoSrc * self)
{
GstClock *clock;
GST_OBJECT_LOCK (self);
clock = GST_ELEMENT_CLOCK (self);
if (clock != NULL)
gst_object_ref (clock);
GST_OBJECT_UNLOCK (self);
if (clock != NULL) {
GstClockTime now = gst_clock_get_time (clock);
gst_object_unref (clock);
self->count++;
if (GST_CLOCK_TIME_IS_VALID (self->last_sampling)) {
if (now - self->last_sampling >= GST_SECOND) {
GST_OBJECT_LOCK (self);
self->fps = self->count;
GST_OBJECT_UNLOCK (self);
g_object_notify (G_OBJECT (self), "fps");
self->last_sampling = now;
self->count = 0;
}
} else {
self->last_sampling = now;
}
}
}
static GstFlowReturn
gst_cel_video_src_create (GstPushSrc * pushsrc, GstBuffer ** buf)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (pushsrc);
GstCMApi *cm = self->ctx->cm;
CMSampleBufferRef sbuf;
sbuf = cm->CMBufferQueueDequeueAndRetain (self->queue);
while (sbuf == NULL) {
QUEUE_READY_LOCK (self);
while (!self->queue_is_ready && g_atomic_int_get (&self->is_running))
QUEUE_READY_WAIT (self);
self->queue_is_ready = FALSE;
QUEUE_READY_UNLOCK (self);
if (G_UNLIKELY (!g_atomic_int_get (&self->is_running)))
goto shutting_down;
sbuf = cm->CMBufferQueueDequeueAndRetain (self->queue);
}
if (G_UNLIKELY (!g_atomic_int_get (&self->is_running)))
goto shutting_down;
*buf = gst_core_media_buffer_new (self->ctx, sbuf);
gst_cel_video_src_timestamp_buffer (self, *buf);
cm->FigSampleBufferRelease (sbuf);
if (self->do_stats)
gst_cel_video_src_update_statistics (self);
return GST_FLOW_OK;
/* ERRORS */
shutting_down:
{
cm->FigSampleBufferRelease (sbuf);
return GST_FLOW_FLUSHING;
}
}
static gboolean
gst_cel_video_src_open_device (GstCelVideoSrc * self)
{
GstCoreMediaCtx *ctx = NULL;
GError *error = NULL;
GstCMApi *cm = NULL;
GstMTApi *mt = NULL;
GstCelApi *cel = NULL;
OSStatus status;
FigCaptureDeviceRef device = NULL;
FigBaseObjectRef device_base;
FigBaseVTable *device_vt;
CFArrayRef stream_array = NULL;
CFIndex stream_index;
FigCaptureStreamRef stream = NULL;
FigBaseObjectRef stream_base;
FigBaseVTable *stream_vt;
CMBufferQueueRef queue = NULL;
CMTime ignored_time;
ctx = gst_core_media_ctx_new (GST_API_CORE_VIDEO | GST_API_CORE_MEDIA
| GST_API_MEDIA_TOOLBOX | GST_API_CELESTIAL, &error);
if (error != NULL)
goto api_error;
cm = ctx->cm;
mt = ctx->mt;
cel = ctx->cel;
status = cel->FigCreateCaptureDevicesAndStreamsForPreset (NULL,
*(cel->kFigRecorderCapturePreset_VideoRecording), NULL,
&device, &stream, NULL, NULL);
if (status == kCelError_ResourceBusy)
goto device_busy;
else if (status != noErr)
goto unexpected_error;
device_base = mt->FigCaptureDeviceGetFigBaseObject (device);
device_vt = cm->FigBaseObjectGetVTable (device_base);
status = device_vt->base->CopyProperty (device_base,
*(mt->kFigCaptureDeviceProperty_StreamArray), NULL,
(CFTypeRef *) & stream_array);
if (status != noErr)
goto unexpected_error;
if (self->device_index >= 0)
stream_index = self->device_index;
else
stream_index = 0;
if (stream_index >= CFArrayGetCount (stream_array))
goto invalid_device_index;
CFRelease (stream);
stream = (FigCaptureStreamRef) CFArrayGetValueAtIndex (stream_array,
stream_index);
CFRetain (stream);
stream_base = mt->FigCaptureStreamGetFigBaseObject (stream);
stream_vt = cm->FigBaseObjectGetVTable (stream_base);
status = stream_vt->base->CopyProperty (stream_base,
*(mt->kFigCaptureStreamProperty_BufferQueue), NULL, &queue);
if (status != noErr)
goto unexpected_error;
self->queue_is_ready = FALSE;
ignored_time = cm->CMTimeMake (1, 1);
status = cm->CMBufferQueueInstallTrigger (queue,
gst_cel_video_src_on_queue_ready, self,
kCMBufferQueueTrigger_WhenDataBecomesReady, ignored_time,
&self->ready_trigger);
if (status != noErr)
goto unexpected_error;
self->ctx = ctx;
self->device = device;
self->device_iface = device_vt->derived;
self->device_base = device_base;
self->device_base_iface = device_vt->base;
self->stream = stream;
self->stream_iface = stream_vt->derived;
self->stream_base = stream_base;
self->stream_base_iface = stream_vt->base;
self->queue = queue;
self->duration = GST_CLOCK_TIME_NONE;
CFRelease (stream_array);
return TRUE;
/* ERRORS */
api_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("API error"),
("%s", error->message));
g_clear_error (&error);
goto any_error;
}
device_busy:
{
GST_ELEMENT_ERROR (self, RESOURCE, BUSY,
("device is already in use"), (NULL));
goto any_error;
}
invalid_device_index:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("invalid video capture device index"), (NULL));
goto any_error;
}
unexpected_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("unexpected error while opening device (%d)", (gint) status), (NULL));
goto any_error;
}
any_error:
{
if (stream != NULL)
CFRelease (stream);
if (stream_array != NULL)
CFRelease (stream_array);
if (device != NULL)
CFRelease (device);
if (ctx != NULL) {
cm->FigBufferQueueRelease (queue);
g_object_unref (ctx);
}
return FALSE;
}
}
static void
gst_cel_video_src_close_device (GstCelVideoSrc * self)
{
gst_cel_video_src_release_device_caps_and_formats (self);
self->stream_iface->Stop (self->stream);
self->stream_base_iface->Finalize (self->stream_base);
CFRelease (self->stream);
self->stream = NULL;
self->stream_iface = NULL;
self->stream_base = NULL;
self->stream_base_iface = NULL;
self->device_base_iface->Finalize (self->device_base);
CFRelease (self->device);
self->device = NULL;
self->device_iface = NULL;
self->device_base = NULL;
self->device_base_iface = NULL;
self->ctx->cm->CMBufferQueueRemoveTrigger (self->queue, self->ready_trigger);
self->ctx->cm->FigBufferQueueRelease (self->queue);
self->ready_trigger = NULL;
self->queue = NULL;
g_object_unref (self->ctx);
self->ctx = NULL;
}
static void
gst_cel_video_src_ensure_device_caps_and_formats (GstCelVideoSrc * self)
{
OSStatus status;
CFArrayRef stream_formats = NULL;
CFIndex format_count, i;
if (self->device_caps != NULL)
goto already_probed;
self->device_caps = gst_caps_new_empty ();
self->device_formats = g_array_new (FALSE, FALSE, sizeof (GstCelVideoFormat));
status = self->stream_base_iface->CopyProperty (self->stream_base,
*(self->ctx->mt->kFigCaptureStreamProperty_SupportedFormatsArray),
NULL, (CFTypeRef *) & stream_formats);
if (status != noErr)
goto beach;
format_count = CFArrayGetCount (stream_formats);
GST_DEBUG_OBJECT (self, "device supports %d formats", (gint) format_count);
for (i = 0; i != format_count; i++) {
CFDictionaryRef sformat;
GstCelVideoFormat format;
sformat = CFArrayGetValueAtIndex (stream_formats, i);
if (gst_cel_video_src_parse_stream_format (self, i, sformat, &format)) {
gst_caps_append_structure (self->device_caps,
gst_structure_new ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, format.fourcc,
"width", G_TYPE_INT, format.width,
"height", G_TYPE_INT, format.height,
"framerate", GST_TYPE_FRACTION, format.fps_n, format.fps_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1, NULL));
g_array_append_val (self->device_formats, format);
} else {
GST_WARNING_OBJECT (self, "ignoring unknown format #%d", (gint) i);
}
}
CFRelease (stream_formats);
already_probed:
beach:
return;
}
static void
gst_cel_video_src_release_device_caps_and_formats (GstCelVideoSrc * self)
{
if (self->device_caps != NULL) {
gst_caps_unref (self->device_caps);
self->device_caps = NULL;
}
if (self->device_formats != NULL) {
g_array_free (self->device_formats, TRUE);
self->device_formats = NULL;
}
}
static gboolean
gst_cel_video_src_select_format (GstCelVideoSrc * self,
GstCelVideoFormat * format)
{
gboolean result = FALSE;
GstMTApi *mt = self->ctx->mt;
GstCelApi *cel = self->ctx->cel;
OSStatus status;
SInt32 framerate;
status = gst_cel_video_src_set_stream_property_i32 (self,
*(mt->kFigCaptureStreamProperty_FormatIndex), format->index);
if (status != noErr)
goto beach;
framerate = format->fps_n / format->fps_d;
status = gst_cel_video_src_set_stream_property_i32 (self,
*(mt->kFigCaptureStreamProperty_MinimumFrameRate), framerate);
if (status != noErr)
goto beach;
status = gst_cel_video_src_set_stream_property_i32 (self,
*(mt->kFigCaptureStreamProperty_MaximumFrameRate), framerate);
if (status != noErr)
goto beach;
status = gst_cel_video_src_set_stream_property_value (self,
*(cel->kFigCaptureStreamProperty_ColorRange),
*(cel->kFigCapturePropertyValue_ColorRangeSDVideo));
if (status != noErr)
goto beach;
status = self->stream_iface->Start (self->stream);
if (status != noErr)
goto beach;
GST_DEBUG_OBJECT (self, "configured format %d (%d x %d @ %d Hz)",
format->index, format->width, format->height, (gint) framerate);
self->duration =
gst_util_uint64_scale (GST_SECOND, format->fps_d, format->fps_n);
result = TRUE;
beach:
return result;
}
static gboolean
gst_cel_video_src_parse_stream_format (GstCelVideoSrc * self,
guint index, CFDictionaryRef stream_format, GstCelVideoFormat * format)
{
GstCMApi *cm = self->ctx->cm;
GstMTApi *mt = self->ctx->mt;
CMFormatDescriptionRef desc;
CMVideoDimensions dim;
UInt32 subtype;
CFNumberRef framerate_value;
SInt32 fps_n;
format->index = index;
desc = CFDictionaryGetValue (stream_format,
*(mt->kFigSupportedFormat_FormatDescription));
dim = cm->CMVideoFormatDescriptionGetDimensions (desc);
format->width = dim.width;
format->height = dim.height;
subtype = cm->CMFormatDescriptionGetMediaSubType (desc);
switch (subtype) {
case kComponentVideoUnsigned:
format->video_format = GST_VIDEO_FORMAT_YUY2;
format->fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
break;
case kYUV420vCodecType:
format->video_format = GST_VIDEO_FORMAT_NV12;
format->fourcc = GST_MAKE_FOURCC ('N', 'V', '1', '2');
break;
default:
goto unsupported_format;
}
framerate_value = CFDictionaryGetValue (stream_format,
*(mt->kFigSupportedFormat_VideoMaxFrameRate));
CFNumberGetValue (framerate_value, kCFNumberSInt32Type, &fps_n);
format->fps_n = fps_n;
format->fps_d = 1;
return TRUE;
unsupported_format:
return FALSE;
}
static OSStatus
gst_cel_video_src_set_stream_property_i32 (GstCelVideoSrc * self,
CFStringRef name, SInt32 value)
{
OSStatus status;
CFNumberRef number;
number = CFNumberCreate (NULL, kCFNumberSInt32Type, &value);
status = self->stream_base_iface->SetProperty (self->stream_base, name,
number);
CFRelease (number);
return status;
}
static OSStatus
gst_cel_video_src_set_stream_property_value (GstCelVideoSrc * self,
CFStringRef name, CFTypeRef value)
{
return self->stream_base_iface->SetProperty (self->stream_base, name, value);
}
static void
gst_cel_video_src_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_metadata (element_class,
"Video Source (Celestial)", "Source/Video",
"Reads frames from an iOS Celestial device",
"Ole André Vadla Ravnås <oleavr@soundrop.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
static void
gst_cel_video_src_class_init (GstCelVideoSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
GstPushSrcClass *gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
gobject_class->dispose = gst_cel_video_src_dispose;
gobject_class->finalize = gst_cel_video_src_finalize;
gobject_class->get_property = gst_cel_video_src_get_property;
gobject_class->set_property = gst_cel_video_src_set_property;
gstelement_class->change_state = gst_cel_video_src_change_state;
gstbasesrc_class->get_caps = gst_cel_video_src_get_caps;
gstbasesrc_class->set_caps = gst_cel_video_src_set_caps;
gstbasesrc_class->start = gst_cel_video_src_start;
gstbasesrc_class->stop = gst_cel_video_src_stop;
gstbasesrc_class->query = gst_cel_video_src_query;
gstbasesrc_class->unlock = gst_cel_video_src_unlock;
gstbasesrc_class->unlock_stop = gst_cel_video_src_unlock_stop;
gstpushsrc_class->create = gst_cel_video_src_create;
g_object_class_install_property (gobject_class, PROP_DEVICE_INDEX,
g_param_spec_int ("device-index", "Device Index",
"The zero-based device index",
-1, G_MAXINT, DEFAULT_DEVICE_INDEX,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DO_STATS,
g_param_spec_boolean ("do-stats", "Enable statistics",
"Enable logging of statistics", DEFAULT_DO_STATS,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FPS,
g_param_spec_int ("fps", "Frames per second",
"Last measured framerate, if statistics are enabled",
-1, G_MAXINT, -1, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
GST_DEBUG_CATEGORY_INIT (gst_cel_video_src_debug, "celvideosrc",
0, "iOS Celestial video source");
}