mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 09:00:54 +00:00
276 lines
7.6 KiB
C
276 lines
7.6 KiB
C
/* vim: set filetype=c: */
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% ClassName
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GstBaseSrc
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% TYPE_CLASS_NAME
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GST_TYPE_BASE_SRC
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% pads
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srcpad-simple
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% pkg-config
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gstreamer-base-1.0
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% includes
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#include <gst/base/gstbasesrc.h>
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% prototypes
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static GstCaps *gst_replace_get_caps (GstBaseSrc * src, GstCaps * filter);
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static gboolean gst_replace_negotiate (GstBaseSrc * src);
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static GstCaps *gst_replace_fixate (GstBaseSrc * src, GstCaps * caps);
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static gboolean gst_replace_set_caps (GstBaseSrc * src, GstCaps * caps);
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static gboolean gst_replace_decide_allocation (GstBaseSrc * src,
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GstQuery * query);
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static gboolean gst_replace_start (GstBaseSrc * src);
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static gboolean gst_replace_stop (GstBaseSrc * src);
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static void gst_replace_get_times (GstBaseSrc * src, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end);
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static gboolean gst_replace_get_size (GstBaseSrc * src, guint64 * size);
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static gboolean gst_replace_is_seekable (GstBaseSrc * src);
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static gboolean gst_replace_prepare_seek_segment (GstBaseSrc * src,
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GstEvent * seek, GstSegment * segment);
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static gboolean gst_replace_do_seek (GstBaseSrc * src, GstSegment * segment);
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static gboolean gst_replace_unlock (GstBaseSrc * src);
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static gboolean gst_replace_unlock_stop (GstBaseSrc * src);
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static gboolean gst_replace_query (GstBaseSrc * src, GstQuery * query);
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static gboolean gst_replace_event (GstBaseSrc * src, GstEvent * event);
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static GstFlowReturn gst_replace_create (GstBaseSrc * src, guint64 offset,
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guint size, GstBuffer ** buf);
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static GstFlowReturn gst_replace_alloc (GstBaseSrc * src, guint64 offset,
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guint size, GstBuffer ** buf);
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static GstFlowReturn gst_replace_fill (GstBaseSrc * src, guint64 offset,
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guint size, GstBuffer * buf);
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% declare-class
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GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);
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% set-methods
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base_src_class->get_caps = GST_DEBUG_FUNCPTR (gst_replace_get_caps);
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base_src_class->negotiate = GST_DEBUG_FUNCPTR (gst_replace_negotiate);
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base_src_class->fixate = GST_DEBUG_FUNCPTR (gst_replace_fixate);
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base_src_class->set_caps = GST_DEBUG_FUNCPTR (gst_replace_set_caps);
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base_src_class->decide_allocation = GST_DEBUG_FUNCPTR (gst_replace_decide_allocation);
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base_src_class->start = GST_DEBUG_FUNCPTR (gst_replace_start);
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base_src_class->stop = GST_DEBUG_FUNCPTR (gst_replace_stop);
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base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_replace_get_times);
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base_src_class->get_size = GST_DEBUG_FUNCPTR (gst_replace_get_size);
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base_src_class->is_seekable = GST_DEBUG_FUNCPTR (gst_replace_is_seekable);
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base_src_class->prepare_seek_segment = GST_DEBUG_FUNCPTR (gst_replace_prepare_seek_segment);
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base_src_class->do_seek = GST_DEBUG_FUNCPTR (gst_replace_do_seek);
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base_src_class->unlock = GST_DEBUG_FUNCPTR (gst_replace_unlock);
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base_src_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_replace_unlock_stop);
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base_src_class->query = GST_DEBUG_FUNCPTR (gst_replace_query);
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base_src_class->event = GST_DEBUG_FUNCPTR (gst_replace_event);
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base_src_class->create = GST_DEBUG_FUNCPTR (gst_replace_create);
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base_src_class->alloc = GST_DEBUG_FUNCPTR (gst_replace_alloc);
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base_src_class->fill = GST_DEBUG_FUNCPTR (gst_replace_fill);
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% methods
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/* get caps from subclass */
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static GstCaps *
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gst_replace_get_caps (GstBaseSrc * src, GstCaps * filter)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "get_caps");
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return NULL;
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}
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/* decide on caps */
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static gboolean
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gst_replace_negotiate (GstBaseSrc * src)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "negotiate");
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return TRUE;
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}
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/* called if, in negotiation, caps need fixating */
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static GstCaps *
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gst_replace_fixate (GstBaseSrc * src, GstCaps * caps)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "fixate");
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return NULL;
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}
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/* notify the subclass of new caps */
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static gboolean
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gst_replace_set_caps (GstBaseSrc * src, GstCaps * caps)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "set_caps");
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return TRUE;
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}
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/* setup allocation query */
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static gboolean
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gst_replace_decide_allocation (GstBaseSrc * src, GstQuery * query)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "decide_allocation");
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return TRUE;
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}
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/* start and stop processing, ideal for opening/closing the resource */
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static gboolean
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gst_replace_start (GstBaseSrc * src)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "start");
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return TRUE;
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}
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static gboolean
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gst_replace_stop (GstBaseSrc * src)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "stop");
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return TRUE;
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}
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/* given a buffer, return start and stop time when it should be pushed
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* out. The base class will sync on the clock using these times. */
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static void
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gst_replace_get_times (GstBaseSrc * src, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "get_times");
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}
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/* get the total size of the resource in bytes */
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static gboolean
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gst_replace_get_size (GstBaseSrc * src, guint64 * size)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "get_size");
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return TRUE;
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}
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/* check if the resource is seekable */
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static gboolean
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gst_replace_is_seekable (GstBaseSrc * src)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "is_seekable");
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return TRUE;
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}
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/* Prepare the segment on which to perform do_seek(), converting to the
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* current basesrc format. */
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static gboolean
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gst_replace_prepare_seek_segment (GstBaseSrc * src, GstEvent * seek,
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GstSegment * segment)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "prepare_seek_segment");
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return TRUE;
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}
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/* notify subclasses of a seek */
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static gboolean
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gst_replace_do_seek (GstBaseSrc * src, GstSegment * segment)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "do_seek");
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return TRUE;
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}
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/* unlock any pending access to the resource. subclasses should unlock
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* any function ASAP. */
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static gboolean
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gst_replace_unlock (GstBaseSrc * src)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "unlock");
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return TRUE;
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}
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/* Clear any pending unlock request, as we succeeded in unlocking */
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static gboolean
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gst_replace_unlock_stop (GstBaseSrc * src)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "unlock_stop");
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return TRUE;
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}
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/* notify subclasses of a query */
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static gboolean
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gst_replace_query (GstBaseSrc * src, GstQuery * query)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "query");
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return TRUE;
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}
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/* notify subclasses of an event */
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static gboolean
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gst_replace_event (GstBaseSrc * src, GstEvent * event)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "event");
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return TRUE;
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}
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/* ask the subclass to create a buffer with offset and size, the default
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* implementation will call alloc and fill. */
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static GstFlowReturn
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gst_replace_create (GstBaseSrc * src, guint64 offset, guint size,
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GstBuffer ** buf)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "create");
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return GST_FLOW_OK;
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}
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/* ask the subclass to allocate an output buffer. The default implementation
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* will use the negotiated allocator. */
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static GstFlowReturn
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gst_replace_alloc (GstBaseSrc * src, guint64 offset, guint size,
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GstBuffer ** buf)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "alloc");
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return GST_FLOW_OK;
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}
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/* ask the subclass to fill the buffer with data from offset and size */
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static GstFlowReturn
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gst_replace_fill (GstBaseSrc * src, guint64 offset, guint size, GstBuffer * buf)
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{
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GstReplace *replace = GST_REPLACE (src);
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GST_DEBUG_OBJECT (replace, "fill");
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return GST_FLOW_OK;
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}
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% end
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