Relicense some non-MPlayer source files to LGPL 2.1 or later

This covers source files which were added in mplayer2 and mpv times
only, and where all code is covered by LGPL relicensing agreements.

There are probably more files to which this applies, but I'm being
conservative here.

A file named ao_sdl.c exists in MPlayer too, but the mpv one is a
complete rewrite, and was added some time after the original ao_sdl.c
was removed. The same applies to vo_sdl.c, for which the SDL2 API is
radically different in addition (MPlayer supports SDL 1.2 only).

common.c contains only code written by me. But common.h is a strange
case: although it originally was named mp_common.h and exists in MPlayer
too, by now it contains only definitions written by uau and me. The
exceptions are the CONTROL_ defines - thus not changing the license of
common.h yet.

codec_tags.c contained once large tables generated from MPlayer's
codecs.conf, but all of these tables were removed.

From demux_playlist.c I'm removing a code fragment from someone who was
not asked; this probably could be done later (see commit 15dccc37).

misc.c is a bit complicated to reason about (it was split off mplayer.c
and thus contains random functions out of this file), but actually all
functions have been added post-MPlayer. Except get_relative_time(),
which was written by uau, but looks similar to 3 different versions of
something similar in each of the Unix/win32/OSX timer source files. I'm
not sure what that means in regards to copyright, so I've just moved it
into another still-GPL source file for now.

screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but
they're all gone.

7 files changed, 44 insertions, 44 deletions

diff --git a/player/core.h b/player/core.h
index e3397d234a..89502d4e1b 100644
--- a/player/core.h
+++ b/player/core.h
@@ -465,7 +465,6 @@ void wakeup_playloop(void *ctx);
 // misc.c
 double rel_time_to_abs(struct MPContext *mpctx, struct m_rel_time t);
 double get_play_end_pts(struct MPContext *mpctx);
-double get_relative_time(struct MPContext *mpctx);
 void merge_playlist_files(struct playlist *pl);
 float mp_get_cache_percent(struct MPContext *mpctx);
 bool mp_get_cache_idle(struct MPContext *mpctx);
@@ -490,6 +489,7 @@ void set_osd_bar_chapters(struct MPContext *mpctx, int type);
 // playloop.c
 void mp_wait_events(struct MPContext *mpctx, double sleeptime);
 void mp_process_input(struct MPContext *mpctx);
+double get_relative_time(struct MPContext *mpctx);
 void reset_playback_state(struct MPContext *mpctx);
 void pause_player(struct MPContext *mpctx);
 void unpause_player(struct MPContext *mpctx);
diff --git a/player/lua.c b/player/lua.c
index 92caa90b19..9fe1d0deca 100644
--- a/player/lua.c
+++ b/player/lua.c
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <assert.h>
diff --git a/player/misc.c b/player/misc.c
index 3729d7a42c..c86a03608c 100644
--- a/player/misc.c
+++ b/player/misc.c
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <stddef.h>
@@ -45,14 +45,6 @@
 #include "core.h"
 #include "command.h"
 
-double get_relative_time(struct MPContext *mpctx)
-{
-    int64_t new_time = mp_time_us();
-    int64_t delta = new_time - mpctx->last_time;
-    mpctx->last_time = new_time;
-    return delta * 0.000001;
-}
-
 double rel_time_to_abs(struct MPContext *mpctx, struct m_rel_time t)
 {
     double length = get_time_length(mpctx);
diff --git a/player/playloop.c b/player/playloop.c
index 120712899b..761fb21c11 100644
--- a/player/playloop.c
+++ b/player/playloop.c
@@ -73,6 +73,14 @@ void mp_process_input(struct MPContext *mpctx)
     }
 }
 
+double get_relative_time(struct MPContext *mpctx)
+{
+    int64_t new_time = mp_time_us();
+    int64_t delta = new_time - mpctx->last_time;
+    mpctx->last_time = new_time;
+    return delta * 0.000001;
+}
+
 void pause_player(struct MPContext *mpctx)
 {
     mpctx->opts->pause = 1;
diff --git a/player/screenshot.c b/player/screenshot.c
index 4ab0653fd4..02cbb4a500 100644
--- a/player/screenshot.c
+++ b/player/screenshot.c
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <stdlib.h>
diff --git a/player/screenshot.h b/player/screenshot.h
index 9ebe9ef76e..aa5dfac2d0 100644
--- a/player/screenshot.h
+++ b/player/screenshot.h
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef MPLAYER_SCREENSHOT_H
diff --git a/player/scripting.c b/player/scripting.c
index 3ae97193ba..cb35b1bfd7 100644
--- a/player/scripting.c
+++ b/player/scripting.c
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <string.h>