win32: add option to set VO MMCSS profile

This was requested.

5 files changed, 17 insertions, 1 deletions

diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index 5e56f5c3ee..f2244fc302 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -3550,6 +3550,10 @@ Miscellaneous
     other options such as e.g. user agent are not available with all protocols,
     and printing errors for unknown options would end up being too noisy.)
 
+``--vo-mmcss-profile=<name>``
+    (Windows only.)
+    Set the MMCSS profile for the video renderer thread (default: ``Playback``).
+
 ``--priority=<prio>``
     (Windows only.)
     Set process priority for mpv according to the predefined priorities
diff --git a/TOOLS/old-configure b/TOOLS/old-configure
index a4776eddae..5f14e7c02f 100755
--- a/TOOLS/old-configure
+++ b/TOOLS/old-configure
@@ -977,6 +977,7 @@ cat > $TMPC << EOF
 #define HAVE_C11_TLS 1
 #define HAVE_EGL_ANGLE 0
 #define HAVE_GPL3 1
+#define HAVE_WIN32 0
 
 #ifdef __OpenBSD__
 #define DEFAULT_CDROM_DEVICE "/dev/rcd0c"
diff --git a/options/options.c b/options/options.c
index d344f48b1a..f65e63566d 100644
--- a/options/options.c
+++ b/options/options.c
@@ -456,6 +456,10 @@ const m_option_t mp_opts[] = {
                ({"auto", 0}, {"no", -1}, {"yes", 1})),
     OPT_FLAG("x11-bypass-compositor", vo.x11_bypass_compositor, 0),
 #endif
+#if HAVE_WIN32
+    OPT_STRING("vo-mmcss-profile", vo.mmcss_profile, M_OPT_FIXED),
+#endif
+
     OPT_STRING("heartbeat-cmd", heartbeat_cmd, 0),
     OPT_FLOAT("heartbeat-interval", heartbeat_interval, CONF_MIN, 0),
 
@@ -701,6 +705,7 @@ const struct MPOpts mp_default_opts = {
         .WinID = -1,
         .window_scale = 1.0,
         .x11_bypass_compositor = 1,
+        .mmcss_profile = "Playback",
     },
     .allow_win_drag = 1,
     .wintitle = "${?media-title:${media-title}}${!media-title:No file} - mpv",
diff --git a/options/options.h b/options/options.h
index 78f19f7b2f..53b8cc4564 100644
--- a/options/options.h
+++ b/options/options.h
@@ -43,6 +43,8 @@ typedef struct mp_vo_opts {
     float monitor_pixel_aspect;
     int force_window_position;
 
+    char *mmcss_profile;
+
     // vo_wayland, vo_drm
     struct sws_opts *sws_opts;
     // vo_opengl, vo_opengl_cb
diff --git a/video/out/w32_common.c b/video/out/w32_common.c
index 217359a7b1..025b744838 100644
--- a/video/out/w32_common.c
+++ b/video/out/w32_common.c
@@ -1327,7 +1327,11 @@ int vo_w32_init(struct vo *vo)
     // While the UI runs in its own thread, the thread in which this function
     // runs in will be the renderer thread. Apply magic MMCSS cargo-cult,
     // which might stop Windows from throttling clock rate and so on.
-    w32->avrt_handle = AvSetMmThreadCharacteristicsW(L"Playback", &(DWORD){0});
+    if (vo->opts->mmcss_profile[0]) {
+        wchar_t *profile = mp_from_utf8(NULL, vo->opts->mmcss_profile);
+        w32->avrt_handle = AvSetMmThreadCharacteristicsW(profile, &(DWORD){0});
+        talloc_free(profile);
+    }
 
     return 1;
 fail: