Add prelimimary (basic, possibly broken) dvdnav support

This readds a more or less completely new dvdnav implementation, though
it's based on the code from before commit 41fbcee. Note that this is
rather basic, and might be broken or not quite usable in many cases.

Most importantly, navigation highlights are not correctly implemented.
This would require changes in the FFmpeg dvdsub decoder (to apply a
different internal CLUT), so supporting it is not really possible right
now. And in fact, I don't think I ever want to support it, because it's
a very small gain for a lot of work. Instead, mpv will display fake
highlights, which are an approximate bounding box around the real
highlights.

Some things like mouse input or switching audio/subtitles stream using
the dvdnav VM are not supported.

Might be quite fragile on transitions: if dvdnav initiates a transition,
and doesn't give us enough mpeg data to initialize video playback, the
player will just quit.

This is added only because some users seem to want it. I don't intend to
make mpv a good DVD player, so the very basic minimum will have to do.
How about you just convert your DVD to proper video files?

1 files changed, 81 insertions, 0 deletions

diff --git a/stream/stream_dvdnav.h b/stream/stream_dvdnav.h
new file mode 100644
index 0000000000..cc8163e015
--- /dev/null
+++ b/stream/stream_dvdnav.h
@@ -0,0 +1,81 @@
+/*
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPLAYER_STREAM_DVDNAV_H
+#define MPLAYER_STREAM_DVDNAV_H
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include "stream.h"
+
+// Sent from stream to player.
+// Note: order matters somewhat (stream_dvdnav sends them in numeric order)
+enum mp_nav_event_type {
+    MP_NAV_EVENT_NONE,
+    MP_NAV_EVENT_RESET,         // reinitialize some things
+    MP_NAV_EVENT_RESET_CLUT,    // reinitialize sub palette
+    MP_NAV_EVENT_RESET_ALL,     // reinitialize all things
+    MP_NAV_EVENT_DRAIN,         // reply with MP_NAV_CMD_DRAIN_OK
+    MP_NAV_EVENT_STILL_FRAME,   // keep displaying current frame
+    MP_NAV_EVENT_HIGHLIGHT,     // highlight changed
+    MP_NAV_EVENT_MENU_MODE,     // menu mode on/off
+    MP_NAV_EVENT_EOF,           // it's over
+};
+
+struct mp_nav_event {
+    enum mp_nav_event_type event;
+    union {
+        /*
+        struct {
+            int seconds;
+        } still_frame;
+        */
+        struct {
+            int display;
+            int sx, sy, ex, ey;
+            uint32_t palette;
+        } highlight;
+        struct {
+            bool enable;
+        } menu_mode;
+    } u;
+};
+
+// Sent from player to stream.
+enum mp_nav_cmd_type {
+    MP_NAV_CMD_NONE,
+    MP_NAV_CMD_ENABLE,        // enable interactive navigation
+    MP_NAV_CMD_DRAIN_OK,      // acknowledge EVENT_DRAIN
+    MP_NAV_CMD_RESUME,
+    MP_NAV_CMD_MENU,
+    MP_NAV_CMD_MOUSE_POS,
+};
+
+struct mp_nav_cmd {
+    enum mp_nav_cmd_type event;
+    union {
+        struct {
+            const char *action;
+        } menu;
+        struct {
+            int x, y;
+        } mouse_pos;
+    } u;
+};
+
+#endif /* MPLAYER_STREAM_DVDNAV_H */