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tracer: use macros for hooks

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Wrap the hook with a pre and post macro. This looks less intrusive than the
previous version, although it is a little less optimized.
This commit is contained in:
Stefan Sauer 2013-10-28 21:39:52 +01:00
parent 9d3975b5da
commit e08fab7d5f
4 changed files with 50 additions and 66 deletions
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26
docs/design/draft-tracing.txt
View file

@ -31,32 +31,20 @@ Hook api
--------
e.g. gst_pad_push() would become:
#ifndef GST_DISABLE_GST_DEBUG
static inline GstFlowReturn __gst_pad_push (GstPad * pad, GstBuffer * buffer);
#endif
GstFlowReturn
gst_pad_push (GstPad * pad, GstBuffer * buffer)
#ifndef GST_DISABLE_GST_DEBUG
{
if (__tracer_enabled && __tracer_hook_is_used)
gst_tracer_push_buffer_pre (pad, buffer);
GstFlowReturn res = __gst_pad_push (GstPad * pad, GstBuffer * buffer);
if (__tracer_enabled && __tracer_hook_is_used)
gst_tracer_push_buffer_post (pad, res);
return res;
}
GstFlowReturn res;
static inline GstFlowReturn
__gst_pad_push (GstPad * pad, GstBuffer * buffer)
#endif
{
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
return gst_pad_push_data (pad,
GST_TRACER_PAD_PUSH_PRE (pad, buffer);
res = gst_pad_push_data (pad,
GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
GST_TRACER_PAD_PUSH_POST (pad, res);
return res;
}
TODO(ensonic): gcc has some magic for wrapping functions
@ -167,8 +155,6 @@ Problems / Open items
- when hooking into a timer, should we just have some predefined intervals?
- how to trigger the shutdown processing?
gst_deinit() (apps can call it from atexit())
- how to share the quark table from gst/gstquark?
use a separate table in gst/gsttracers or add a getter to gst/gstquark
- how to chain tracers (use the rank?)
e.g. how can the stats tracer get data from rusage/mallinfo tracers
or should all tracers just log and we would use a gst-stats tool to collect
@ -183,3 +169,5 @@ Try it
GST_DEBUG="GST_REG*:4,GST_TRACER:4,log:7" GST_TRACE=log gst-launch-1.0 fakesrc num-buffers=10 ! fakesink
- traces for buffer flow in TRACE level and default category
GST_DEBUG="GST_REG*:4,GST_TRACER:4" GST_TRACE=stats gst-launch-1.0 fakesrc num-buffers=10 ! queue ! fakesink
- print some pipeline stats on exit

47
gst/gstpad.c
View file

@ -4443,35 +4443,20 @@ not_linked:
*
* MT safe.
*/
#ifndef GST_DISABLE_GST_DEBUG
static inline GstFlowReturn __gst_pad_push (GstPad * pad, GstBuffer * buffer);
#endif
GstFlowReturn
gst_pad_push (GstPad * pad, GstBuffer * buffer)
#ifndef GST_DISABLE_GST_DEBUG
{
const gboolean trace = gst_tracer_is_enabled (GST_TRACER_HOOK_ID_BUFFERS);
GstFlowReturn res;
if (trace)
gst_tracer_push_buffer_pre (gst_util_get_timestamp (), pad, buffer);
res = __gst_pad_push (pad, buffer);
if (trace)
gst_tracer_push_buffer_post (gst_util_get_timestamp (), pad, res);
return res;
}
static inline GstFlowReturn
__gst_pad_push (GstPad * pad, GstBuffer * buffer)
#endif
{
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
return gst_pad_push_data (pad,
GST_TRACER_PAD_PUSH_PRE (pad, buffer);
res = gst_pad_push_data (pad,
GST_PAD_PROBE_TYPE_BUFFER | GST_PAD_PROBE_TYPE_PUSH, buffer);
GST_TRACER_PAD_PUSH_POST (pad, res);
return res;
}
/**
@ -4498,36 +4483,20 @@ __gst_pad_push (GstPad * pad, GstBuffer * buffer)
*
* MT safe.
*/
#ifndef GST_DISABLE_GST_DEBUG
static inline GstFlowReturn __gst_pad_push_list (GstPad * pad,
GstBufferList * list);
#endif
GstFlowReturn
gst_pad_push_list (GstPad * pad, GstBufferList * list)
#ifndef GST_DISABLE_GST_DEBUG
{
const gboolean trace = gst_tracer_is_enabled (GST_TRACER_HOOK_ID_BUFFERS);
GstFlowReturn res;
if (trace)
gst_tracer_push_buffer_list_pre (gst_util_get_timestamp (), pad, list);
res = __gst_pad_push_list (pad, list);
if (trace)
gst_tracer_push_buffer_list_post (gst_util_get_timestamp (), pad, res);
return res;
}
static inline GstFlowReturn
__gst_pad_push_list (GstPad * pad, GstBufferList * list)
#endif
{
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_PAD_IS_SRC (pad), GST_FLOW_ERROR);
g_return_val_if_fail (GST_IS_BUFFER_LIST (list), GST_FLOW_ERROR);
return gst_pad_push_data (pad,
GST_TRACER_PAD_PUSH_LIST_PRE (pad, list);
res = gst_pad_push_data (pad,
GST_PAD_PROBE_TYPE_BUFFER_LIST | GST_PAD_PROBE_TYPE_PUSH, list);
GST_TRACER_PAD_PUSH_LIST_POST (pad, res);
return res;
}
static GstFlowReturn

8
gst/gsttracer.c
View file

@ -295,7 +295,7 @@ dispatch (GstTracerHookId id, guint64 ts, GstStructure * s)
/* tracing hooks */
void
gst_tracer_push_buffer_pre (guint64 ts, GstPad * pad, GstBuffer * buffer)
gst_tracer_push_pre (guint64 ts, GstPad * pad, GstBuffer * buffer)
{
dispatch (GST_TRACER_HOOK_ID_BUFFERS, ts,
gst_structure_new_id (GST_QUARK (PUSH_BUFFER_PRE),
@ -304,7 +304,7 @@ gst_tracer_push_buffer_pre (guint64 ts, GstPad * pad, GstBuffer * buffer)
}
void
gst_tracer_push_buffer_post (guint64 ts, GstPad * pad, GstFlowReturn res)
gst_tracer_push_post (guint64 ts, GstPad * pad, GstFlowReturn res)
{
dispatch (GST_TRACER_HOOK_ID_BUFFERS, ts,
gst_structure_new_id (GST_QUARK (PUSH_BUFFER_POST),
@ -313,7 +313,7 @@ gst_tracer_push_buffer_post (guint64 ts, GstPad * pad, GstFlowReturn res)
}
void
gst_tracer_push_buffer_list_pre (guint64 ts, GstPad * pad, GstBufferList * list)
gst_tracer_push_list_pre (guint64 ts, GstPad * pad, GstBufferList * list)
{
dispatch (GST_TRACER_HOOK_ID_BUFFERS, ts,
gst_structure_new_id (GST_QUARK (PUSH_BUFFER_LIST_PRE),
@ -322,7 +322,7 @@ gst_tracer_push_buffer_list_pre (guint64 ts, GstPad * pad, GstBufferList * list)
}
void
gst_tracer_push_buffer_list_post (guint64 ts, GstPad * pad, GstFlowReturn res)
gst_tracer_push_list_post (guint64 ts, GstPad * pad, GstFlowReturn res)
{
dispatch (GST_TRACER_HOOK_ID_BUFFERS, ts,
gst_structure_new_id (GST_QUARK (PUSH_BUFFER_LIST_POST),

35
gst/gsttracer.h
View file

@ -105,10 +105,37 @@ gboolean gst_tracer_register (GstPlugin * plugin, const gchar * name, GType type
gboolean gst_tracer_is_enabled (GstTracerHookId id);
void gst_tracer_push_buffer_pre (guint64 ts, GstPad *pad, GstBuffer *buffer);
void gst_tracer_push_buffer_post (guint64 ts, GstPad *pad, GstFlowReturn res);
void gst_tracer_push_buffer_list_pre (guint64 ts, GstPad * pad, GstBufferList * list);
void gst_tracer_push_buffer_list_post (guint64 ts, GstPad * pad, GstFlowReturn res);
void gst_tracer_push_pre (guint64 ts, GstPad *pad, GstBuffer *buffer);
void gst_tracer_push_post (guint64 ts, GstPad *pad, GstFlowReturn res);
void gst_tracer_push_list_pre (guint64 ts, GstPad * pad, GstBufferList * list);
void gst_tracer_push_list_post (guint64 ts, GstPad * pad, GstFlowReturn res);
#define GST_TRACER_PAD_PUSH_PRE(pad, buffer) G_STMT_START{ \
if (gst_tracer_is_enabled (GST_TRACER_HOOK_ID_BUFFERS)) \
gst_tracer_push_pre (gst_util_get_timestamp (), pad, buffer); \
}G_STMT_END
#define GST_TRACER_PAD_PUSH_POST(pad, res) G_STMT_START{ \
if (gst_tracer_is_enabled (GST_TRACER_HOOK_ID_BUFFERS)) \
gst_tracer_push_post (gst_util_get_timestamp (), pad, res); \
}G_STMT_END
#define GST_TRACER_PAD_PUSH_LIST_PRE(pad, list) G_STMT_START{ \
if (gst_tracer_is_enabled (GST_TRACER_HOOK_ID_BUFFERS)) \
gst_tracer_push_list_pre (gst_util_get_timestamp (), pad, list); \
}G_STMT_END
#define GST_TRACER_PAD_PUSH_LIST_POST(pad, res) G_STMT_START{ \
if (gst_tracer_is_enabled (GST_TRACER_HOOK_ID_BUFFERS)) \
gst_tracer_push_list_post (gst_util_get_timestamp (), pad, res); \
}G_STMT_END
#else /* !GST_DISABLE_GST_DEBUG */
#define GST_TRACER_PAD_PUSH_PRE(pad, buffer)
#define GST_TRACER_PAD_PUSH_POST(pad, res)
#define GST_TRACER_PAD_PUSH_LIST_PRE(pad, list)
#define GST_TRACER_PAD_PUSH_LIST_POST(pad, res)
#endif /* GST_DISABLE_GST_DEBUG */