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player: always disable display-sync on desyncs

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Instead of periodically trying to enable it again. There are two cases
that can happen:

1. A random discontinuity messed everything up,
2. Things are just broken and will desync all the time

Until now, it tried to deal with case 1 - but maybe this is really rare,
and we don't really need to care about it. On the other hand, case 2 is
kind of hard to diagnose if the user doesn't use the terminal.

Seeking will reenable display-sync, so you can fix playback if case 1
happens, but still get predictable behavior in case 2.
This commit is contained in:
wm4 2015-11-27 14:40:52 +01:00
parent 41f2c653e2
commit 50bb209a80
2 changed files with 13 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
player/core.h
View File

@ -269,6 +269,7 @@ typedef struct MPContext {
// update_playback_speed() updates them from the other fields.
double audio_speed, video_speed;
bool display_sync_active;
bool display_sync_broken;
int display_sync_drift_dir;
// Timing error (in seconds) due to rounding on vsync boundaries
double display_sync_error;

34
player/video.c
View File

@ -214,6 +214,7 @@ void reset_video_state(struct MPContext *mpctx)
mpctx->mistimed_frames_total = 0;
mpctx->drop_message_shown = 0;
mpctx->display_sync_drift_dir = 0;
mpctx->display_sync_broken = false;
mpctx->video_status = mpctx->d_video ? STATUS_SYNCING : STATUS_EOF;
}
@ -949,7 +950,7 @@ static void handle_display_sync_frame(struct MPContext *mpctx,
mpctx->display_sync_active = false;
if (!VS_IS_DISP(mode))
goto done;
return;
bool resample = mode == VS_DISP_RESAMPLE || mode == VS_DISP_RESAMPLE_VDROP ||
mode == VS_DISP_RESAMPLE_NONE;
bool drop = mode == VS_DISP_VDROP || mode == VS_DISP_RESAMPLE ||
@ -957,16 +958,16 @@ static void handle_display_sync_frame(struct MPContext *mpctx,
drop &= (opts->frame_dropping & 1);
if (resample && using_spdif_passthrough(mpctx))
goto done;
return;
double vsync = vo_get_vsync_interval(vo) / 1e6;
if (vsync <= 0)
goto done;
return;
double adjusted_duration = mpctx->past_frames[0].approx_duration;
adjusted_duration /= opts->playback_speed;
if (adjusted_duration <= 0.001 || adjusted_duration > 0.5)
goto done;
return;
mpctx->speed_factor_v = 1.0;
if (mode != VS_DISP_VDROP) {
@ -977,18 +978,9 @@ static void handle_display_sync_frame(struct MPContext *mpctx,
}
double av_diff = mpctx->last_av_difference;
if (fabs(av_diff) > 0.5)
goto done;
// At this point, we decided that we could use display sync for this frame.
// But if we switch too often between these modes, keep it disabled. In
// fact, we disable it if it just wants to switch between enable/disable
// more than once in the last N frames.
if (mpctx->num_past_frames > 1 && mpctx->past_frames[1].num_vsyncs < 0) {
for (int n = 1; n < mpctx->num_past_frames; n++) {
if (mpctx->past_frames[n].num_vsyncs >= 0)
goto done;
}
if (fabs(av_diff) > 0.5) {
mpctx->display_sync_broken = true;
return;
}
// Determine for how many vsyncs a frame should be displayed. This can be
@ -1062,8 +1054,11 @@ static void handle_display_sync_frame(struct MPContext *mpctx,
MP_STATS(mpctx, "value %f aspeed", mpctx->speed_factor_a - 1);
MP_STATS(mpctx, "value %f vspeed", mpctx->speed_factor_v - 1);
}
done:
static void schedule_frame(struct MPContext *mpctx, struct vo_frame *frame)
{
handle_display_sync_frame(mpctx, frame);
if (mpctx->num_past_frames > 1 &&
((mpctx->past_frames[1].num_vsyncs >= 0) != mpctx->display_sync_active))
@ -1071,11 +1066,6 @@ done:
MP_VERBOSE(mpctx, "Video sync mode %s.\n",
mpctx->display_sync_active ? "enabled" : "disabled");
}
}
static void schedule_frame(struct MPContext *mpctx, struct vo_frame *frame)
{
handle_display_sync_frame(mpctx, frame);
if (!mpctx->display_sync_active) {
mpctx->speed_factor_a = 1.0;