stats: some more performance graphs

Add an infrastructure for collecting performance-related data, use it in
some places. Add rendering of them to stats.lua.

There were two main goals: minimal impact on the normal code and normal
playback. So all these stats_* function calls either happen only during
initialization, or return immediately if no stats collection is going
on. That's why it does this lazily adding of stats entries etc. (a first
iteration made each stats entry an API thing, instead of just a single
stats_ctx, but I thought that was getting too intrusive in the "normal"
code, even if everything gets worse inside of stats.c).

You could get most of this information from various profilers (including
the extremely primitive --dump-stats thing in mpv), but this makes it
easier to see the most important information at once (at least in
theory), partially because we know best about the context of various
things.

Not very happy with this. It's all pretty primitive and dumb. At this
point I just wanted to get over with it, without necessarily having to
revisit it later, but with having my stupid statistics.

Somehow the code feels terrible. There are a lot of meh decisions in
there that could be better or worse (but mostly could be better), and it
just sucks but it's also trivial and uninteresting and does the job. I
guess I hate programming. It's so tedious and the result is always shit.
Anyway, enjoy.

1 files changed, 19 insertions, 0 deletions

diff --git a/player/command.c b/player/command.c
index e1f755d46c..a41a636c7d 100644
--- a/player/command.c
+++ b/player/command.c
@@ -38,6 +38,7 @@
 #include "common/codecs.h"
 #include "common/msg.h"
 #include "common/msg_control.h"
+#include "common/stats.h"
 #include "filters/f_decoder_wrapper.h"
 #include "command.h"
 #include "osdep/timer.h"
@@ -2446,6 +2447,23 @@ out:
     return ret;
 }
 
+static int mp_property_perf_info(void *ctx, struct m_property *p, int action,
+                                 void *arg)
+{
+    MPContext *mpctx = ctx;
+
+    switch (action) {
+    case M_PROPERTY_GET_TYPE:
+        *(struct m_option *)arg = (struct m_option){.type = CONF_TYPE_NODE};
+        return M_PROPERTY_OK;
+    case M_PROPERTY_GET: {
+        stats_global_query(mpctx->global, (struct mpv_node *)arg);
+        return M_PROPERTY_OK;
+    }
+    }
+    return M_PROPERTY_NOT_IMPLEMENTED;
+}
+
 static int mp_property_vo(void *ctx, struct m_property *p, int action, void *arg)
 {
     MPContext *mpctx = ctx;
@@ -3425,6 +3443,7 @@ static const struct m_property mp_properties_base[] = {
     {"current-window-scale", mp_property_current_window_scale},
     {"vo-configured", mp_property_vo_configured},
     {"vo-passes", mp_property_vo_passes},
+    {"perf-info", mp_property_perf_info},
     {"current-vo", mp_property_vo},
     {"container-fps", mp_property_fps},
     {"estimated-vf-fps", mp_property_vf_fps},