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403 results
Show changes
Commits on Source (2)
  • Romain Vimont's avatar
    qt: do not take snapshots from the UI thread · 1aa5ca65
    Romain Vimont authored and Rémi Denis-Courmont's avatar Rémi Denis-Courmont committed
    Snapshots are performed via a call to:
    
        var_TriggerCallback("video-snapshot")
    
    causing its callback (SnapshotCallback) to be called synchronously,
    executing the following steps:
     - wait for the vout thread to actually capture the (next) frame;
     - encode the picture to PNG;
     - write the result to disk (I/O).
    
    Since var_TriggerCallback("video-snapshot") is called from the UI
    thread, all these blocking actions are also performed on the UI thread.
    
    Move the call to a separate thread.
    1aa5ca65
  • Romain Vimont's avatar
    hotkeys: do not take snapshots from the UI thread · b3ccc7b0
    Romain Vimont authored and Rémi Denis-Courmont's avatar Rémi Denis-Courmont committed
    Snapshots are performed via a call to:
    
        var_TriggerCallback("video-snapshot")
    
    causing its callback (SnapshotCallback) to be called synchronously,
    executing the following steps:
     - wait for the vout thread to actually capture the (next) frame;
     - encode the picture to PNG;
     - write the result to disk (I/O).
    
    Since var_TriggerCallback("video-snapshot") is called from the UI
    thread, all these blocking actions are also performed on the UI thread.
    
    Move the call to a separate thread.
    b3ccc7b0
......@@ -37,6 +37,7 @@
#include <vlc_playlist.h>
#include <vlc_actions.h>
#include <vlc_spu.h>
#include <vlc_executor.h>
#include "math.h"
struct intf_sys_t
......@@ -56,6 +57,8 @@ struct intf_sys_t
vlc_tick_t subtitle_time;
} subsync;
enum vlc_vout_order spu_channel_order;
vlc_executor_t *executor;
};
static void handle_action(intf_thread_t *, vlc_action_id_t);
......@@ -758,6 +761,42 @@ PLAYER_ACTION_HANDLER(Aout)
}
}
struct snapshot_task
{
struct vlc_runnable runnable;
vout_thread_t *vout;
};
static void RunSnapshot(void *userdata)
{
struct snapshot_task *task = userdata;
var_TriggerCallback(task->vout, "video-snapshot");
vout_Release(task->vout);
free(task);
}
static void TakeSnapshotAsync(struct intf_sys_t *sys, vlc_player_t *player)
{
if (!sys->executor)
{
/* Create the executor only on the first request */
sys->executor = vlc_executor_New(1);
if (!sys->executor)
return;
}
struct snapshot_task *task = malloc(sizeof(*task));
if (!task)
return;
task->vout = vlc_player_vout_Hold(player);
task->runnable.run = RunSnapshot;
task->runnable.userdata = task;
vlc_executor_Submit(sys->executor, &task->runnable);
}
PLAYER_ACTION_HANDLER(Vouts)
{
VLC_UNUSED(intf);
......@@ -770,7 +809,7 @@ PLAYER_ACTION_HANDLER(Vouts)
vlc_player_vout_SetFullscreen(player, false);
break;
case ACTIONID_SNAPSHOT:
vlc_player_vout_Snapshot(player);
TakeSnapshotAsync(intf->p_sys, player);
break;
case ACTIONID_WALLPAPER:
vlc_player_vout_ToggleWallpaperMode(player);
......@@ -1283,6 +1322,9 @@ Open(vlc_object_t *this)
return VLC_EGENERIC;
}
var_AddCallback(vlc_object_instance(intf), "key-action", ActionCallback, intf);
sys->executor = NULL;
intf->p_sys = sys;
return VLC_SUCCESS;
}
......@@ -1302,6 +1344,13 @@ Close(vlc_object_t *this)
vlc_player_Unlock(player);
var_DelCallback(vlc_object_instance(intf), "key-action", ActionCallback, intf);
if (sys->executor)
{
vlc_executor_WaitIdle(sys->executor);
vlc_executor_Delete(sys->executor);
}
free(sys);
}
......
......@@ -35,6 +35,7 @@
#include <QFile>
#include <QDir>
#include <QSignalMapper>
#include <QThreadPool>
#include <assert.h>
......@@ -1791,7 +1792,22 @@ void PlayerController::snapshot()
{
VoutPtr vout = getVout();
if (vout)
var_TriggerCallback(vout.get(), "video-snapshot");
{
/* Passing a lambda directly would require Qt 5.15:
* <https://doc.qt.io/qt-5/qthreadpool.html#start-1>
*/
struct SnapshotTask : public QRunnable
{
VoutPtr vout;
SnapshotTask(VoutPtr vout) : vout(std::move(vout)) {}
void run() override
{
var_TriggerCallback(vout.get(), "video-snapshot");
}
};
QThreadPool::globalInstance()->start(new SnapshotTask(std::move(vout)));
}
}
......