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Code Issues 1 Projects Releases Wiki Activity

rndbuffersize: add push mode support

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=656317
This commit is contained in:
Tim-Philipp Müller 2012-06-28 20:03:05 +01:00
parent c06cb7c145
commit b9d020ac4f
1 changed files with 129 additions and 16 deletions
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145
gst/debugutils/rndbuffersize.c
View file

@ -27,6 +27,7 @@
#endif
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
GST_DEBUG_CATEGORY_STATIC (gst_rnd_buffer_size_debug);
#define GST_CAT_DEFAULT gst_rnd_buffer_size_debug
@ -53,6 +54,8 @@ struct _GstRndBufferSize
guint64 offset;
gboolean need_newsegment;
GstAdapter *adapter;
};
struct _GstRndBufferSizeClass
@ -95,6 +98,10 @@ static GstStateChangeReturn gst_rnd_buffer_size_change_state (GstElement *
element, GstStateChange transition);
static gboolean gst_rnd_buffer_size_src_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static gboolean gst_rnd_buffer_size_sink_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static GstFlowReturn gst_rnd_buffer_size_chain (GstPad * pad,
GstObject * parent, GstBuffer * buffer);
GType gst_rnd_buffer_size_get_type (void);
#define gst_rnd_buffer_size_parent_class parent_class
@ -148,6 +155,10 @@ gst_rnd_buffer_size_init (GstRndBufferSize * self)
GST_DEBUG_FUNCPTR (gst_rnd_buffer_size_activate));
gst_pad_set_activatemode_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_rnd_buffer_size_activate_mode));
gst_pad_set_event_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_rnd_buffer_size_sink_event));
gst_pad_set_chain_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_rnd_buffer_size_chain));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&src_template, "src");
@ -225,25 +236,19 @@ gst_rnd_buffer_size_activate (GstPad * pad, GstObject * parent)
query = gst_query_new_scheduling ();
if (!gst_pad_peer_query (pad, query)) {
gst_query_unref (query);
goto no_pull;
}
if (gst_pad_peer_query (pad, query))
pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
else
pull_mode = FALSE;
pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
gst_query_unref (query);
if (!pull_mode)
goto no_pull;
GST_DEBUG_OBJECT (pad, "activating pull");
return gst_pad_activate_mode (pad, GST_PAD_MODE_PULL, TRUE);
/* ERRORS */
no_pull:
{
GST_DEBUG_OBJECT (pad, "pull mode not supported");
return FALSE;
if (pull_mode) {
GST_DEBUG_OBJECT (pad, "activating pull");
return gst_pad_activate_mode (pad, GST_PAD_MODE_PULL, TRUE);
} else {
GST_DEBUG_OBJECT (pad, "activating push");
return gst_pad_activate_mode (pad, GST_PAD_MODE_PUSH, TRUE);
}
}
@ -268,6 +273,10 @@ gst_rnd_buffer_size_activate_mode (GstPad * pad, GstObject * parent,
res = gst_pad_stop_task (pad);
}
break;
case GST_PAD_MODE_PUSH:
GST_INFO_OBJECT (self, "%sactivating in push mode", (active) ? "" : "de");
res = TRUE;
break;
default:
res = FALSE;
break;
@ -329,6 +338,106 @@ gst_rnd_buffer_size_src_event (GstPad * pad, GstObject * parent,
return TRUE;
}
static GstFlowReturn
gst_rnd_buffer_size_drain_adapter (GstRndBufferSize * self, gboolean eos)
{
GstFlowReturn flow;
GstBuffer *buf;
guint num_bytes, avail;
flow = GST_FLOW_OK;
if (G_UNLIKELY (self->min > self->max))
goto bogus_minmax;
do {
if (self->min != self->max) {
num_bytes = g_rand_int_range (self->rand, self->min, self->max);
} else {
num_bytes = self->min;
}
GST_LOG_OBJECT (self, "pulling %u bytes out of adapter", num_bytes);
buf = gst_adapter_take_buffer (self->adapter, num_bytes);
if (buf == NULL) {
if (!eos) {
GST_LOG_OBJECT (self, "not enough bytes in adapter");
break;
}
avail = gst_adapter_available (self->adapter);
if (avail == 0)
break;
if (avail < self->min) {
GST_WARNING_OBJECT (self, "discarding %u bytes at end (min=%u)",
avail, self->min);
gst_adapter_clear (self->adapter);
break;
}
buf = gst_adapter_take_buffer (self->adapter, avail);
g_assert (buf != NULL);
}
flow = gst_pad_push (self->srcpad, buf);
}
while (flow == GST_FLOW_OK);
return flow;
/* ERRORS */
bogus_minmax:
{
GST_ELEMENT_ERROR (self, LIBRARY, SETTINGS,
("The minimum buffer size is smaller than the maximum buffer size."),
("buffer sizes: max=%d, min=%d", self->min, self->max));
return GST_FLOW_ERROR;
}
}
static gboolean
gst_rnd_buffer_size_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstRndBufferSize *rnd = GST_RND_BUFFER_SIZE (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
gst_rnd_buffer_size_drain_adapter (rnd, TRUE);
break;
case GST_EVENT_FLUSH_STOP:
if (rnd->adapter != NULL)
gst_adapter_clear (rnd->adapter);
break;
default:
break;
}
return gst_pad_push_event (rnd->srcpad, event);
}
static GstFlowReturn
gst_rnd_buffer_size_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstRndBufferSize *rnd = GST_RND_BUFFER_SIZE (parent);
GstFlowReturn flow;
if (rnd->adapter == NULL)
rnd->adapter = gst_adapter_new ();
gst_adapter_push (rnd->adapter, buf);
flow = gst_rnd_buffer_size_drain_adapter (rnd, FALSE);
if (flow != GST_FLOW_OK)
GST_INFO_OBJECT (rnd, "flow: %s", gst_flow_get_name (flow));
return flow;
}
static void
gst_rnd_buffer_size_loop (GstRndBufferSize * self)
{
@ -452,6 +561,10 @@ gst_rnd_buffer_size_change_state (GstElement * element,
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (self->adapter) {
g_object_unref (self->adapter);
self->adapter = NULL;
}
break;
default:
break;