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vo_opengl: add check-pattern suboption for testing

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This uses glXGetVideoSyncSGI() to check how many vsyncs happened since
the last flip_page() call. It allows checking a pattern of vsync
increments of at most 2 elements. For example, to check ~24 fps playback
on a ~60 Hz monitor, this can be used:

--vo=opengl:check-pattern=[3-2]:waitvsync

Whether the reported results are accurate or just plain wrong may depend
on the driver and if the waitvsync sub-option is used. There are no
guarantees.

This option is undocumented, and may be removed again in the near or
distant future.
This commit is contained in:
wm4 2014-08-18 22:59:12 +02:00
parent aaadcef52f
commit cd2e4db8a5
1 changed files with 28 additions and 2 deletions
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30
video/out/vo_opengl.c
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@ -76,6 +76,11 @@ struct gl_priv {
int frames_rendered;
unsigned int prev_sgi_sync_count;
// check-pattern sub-option; for testing/debugging
int opt_pattern[2];
int last_pattern;
int matches, mismatches;
};
// Always called under mpgl_lock
@ -95,6 +100,22 @@ static void resize(struct gl_priv *p)
vo->want_redraw = true;
}
static void check_pattern(struct vo *vo, int item)
{
struct gl_priv *p = vo->priv;
int expected = p->opt_pattern[p->last_pattern];
if (item == expected) {
p->last_pattern++;
if (p->last_pattern >= 2)
p->last_pattern = 0;
p->matches++;
} else {
p->mismatches++;
MP_WARN(vo, "wrong pattern, exptected %d got %d (hit: %d, mis: %d)\n",
expected, item, p->matches, p->mismatches);
}
}
static void flip_page(struct vo *vo)
{
struct gl_priv *p = vo->priv;
@ -111,17 +132,21 @@ static void flip_page(struct vo *vo)
if (p->use_glFinish)
gl->Finish();
if (p->waitvsync) {
if (p->waitvsync || p->opt_pattern[0]) {
if (gl->GetVideoSync) {
unsigned int n1 = 0, n2 = 0;
gl->GetVideoSync(&n1);
gl->WaitVideoSync(2, (n1 + 1) % 2, &n2);
if (p->waitvsync)
gl->WaitVideoSync(2, (n1 + 1) % 2, &n2);
int step = n1 - p->prev_sgi_sync_count;
p->prev_sgi_sync_count = n1;
MP_DBG(vo, "Flip counts: %u->%u, step=%d\n", n1, n2, step);
if (p->opt_pattern[0])
check_pattern(vo, step);
} else {
MP_WARN(vo, "GLX_SGI_video_sync not available, disabling.\n");
p->waitvsync = 0;
p->opt_pattern[0] = 0;
}
}
@ -476,6 +501,7 @@ const struct m_option options[] = {
OPT_FLAG("debug", use_gl_debug, 0),
OPT_STRING_VALIDATE("backend", backend, 0, mpgl_validate_backend_opt),
OPT_FLAG("sw", allow_sw, 0),
OPT_INTPAIR("check-pattern", opt_pattern, 0),
OPT_SUBSTRUCT("", renderer_opts, gl_video_conf, 0),
OPT_SUBSTRUCT("", icc_opts, mp_icc_conf, 0),