mplayer: attempt to make playback resume work with DVD/BD

The problem with DVD/BD and playback resume is that most often, the
filename is just "dvd://", while the actual path to the DVD disk image
is given with --dvd-device. But playback resume works on the filename
only.

Add a pretty bad hack that includes the path to the disk image if the
filename starts with dvd://, and the same for BD respectively. (It's a
bad hack, but I want to go to bed, so here we go. I might revert or
improve it later, depending on user feedback.)

We have to cleanup the global variable mess around the dvd_device.
Ideally, this should go into MPOpts, but it isn't yet. Make the code
paths in mplayer.c take MPOpts anyway.

mpvcore/command.c

@@ -2411,7 +2411,8 @@ void run_command(MPContext *mpctx, mp_cmd_t *cmd)
             talloc_free(pl);
 
             if (!append && mpctx->playlist->first) {
-                struct playlist_entry *e = mp_resume_playlist(mpctx->playlist);
+                struct playlist_entry *e =
+                    mp_resume_playlist(mpctx->playlist, opts);
                 mp_set_playlist_entry(mpctx, e ? e : mpctx->playlist->first);
             }
         } else {

mpvcore/mp_core.h

@@ -336,7 +336,8 @@ struct playlist_entry *mp_next_file(struct MPContext *mpctx, int direction,
 int mp_get_cache_percent(struct MPContext *mpctx);
 void mp_write_watch_later_conf(struct MPContext *mpctx);
 void mp_set_playlist_entry(struct MPContext *mpctx, struct playlist_entry *e);
-struct playlist_entry *mp_resume_playlist(struct playlist *pl);
+struct playlist_entry *mp_resume_playlist(struct playlist *playlist,
+                                          struct MPOpts *opts);
 void mp_force_video_refresh(struct MPContext *mpctx);
 
 void mp_print_version(int always);

mpvcore/mplayer.c

@@ -777,17 +777,28 @@ static void load_per_file_config(m_config_t *conf, const char * const file,
 
 #define MP_WATCH_LATER_CONF "watch_later"
 
-static char *get_playback_resume_config_filename(const char *fname)
+static char *get_playback_resume_config_filename(const char *fname,
+                                                 struct MPOpts *opts)
 {
     char *res = NULL;
     void *tmp = talloc_new(NULL);
     const char *realpath = fname;
-    if (!mp_is_url(bstr0(fname))) {
+    bstr bfname = bstr0(fname);
+    if (!mp_is_url(bfname)) {
         char *cwd = mp_getcwd(tmp);
         if (!cwd)
             goto exit;
         realpath = mp_path_join(tmp, bstr0(cwd), bstr0(fname));
     }
+#ifdef CONFIG_DVDREAD
+    if (bstr_startswith0(bfname, "dvd://"))
+        realpath = talloc_asprintf(tmp, "%s - %s", realpath, dvd_device);
+#endif
+#ifdef CONFIG_LIBBLURAY
+    if (bstr_startswith0(bfname, "br://") || bstr_startswith0(bfname, "bd://") ||
+        bstr_startswith0(bfname, "bluray://"))
+        realpath = talloc_asprintf(tmp, "%s - %s", realpath, bluray_device);
+#endif
     uint8_t md5[16];
     av_md5_sum(md5, realpath, strlen(realpath));
     char *conf = talloc_strdup(tmp, "");
@@ -853,7 +864,8 @@ void mp_write_watch_later_conf(struct MPContext *mpctx)
 
     mk_config_dir(MP_WATCH_LATER_CONF);
 
-    char *conffile = get_playback_resume_config_filename(mpctx->filename);
+    char *conffile = get_playback_resume_config_filename(mpctx->filename,
+                                                         mpctx->opts);
     talloc_steal(tmp, conffile);
     if (!conffile)
         goto exit;
@@ -880,7 +892,7 @@ exit:
 
 static void load_playback_resume(m_config_t *conf, const char *file)
 {
-    char *fname = get_playback_resume_config_filename(file);
+    char *fname = get_playback_resume_config_filename(file, conf->optstruct);
     if (fname && mp_path_exists(fname)) {
         // Never apply the saved start position to following files
         m_config_backup_opt(conf, "start");
@@ -897,10 +909,11 @@ static void load_playback_resume(m_config_t *conf, const char *file)
 // resume file for them, this is simpler, and also has the nice property
 // that appending to a playlist doesn't interfere with resuming (especially
 // if the playlist comes from the command line).
-struct playlist_entry *mp_resume_playlist(struct playlist *playlist)
+struct playlist_entry *mp_resume_playlist(struct playlist *playlist,
+                                          struct MPOpts *opts)
 {
     for (struct playlist_entry *e = playlist->first; e; e = e->next) {
-        char *conf = get_playback_resume_config_filename(e->filename);
+        char *conf = get_playback_resume_config_filename(e->filename, opts);
         bool exists = conf && mp_path_exists(conf);
         talloc_free(conf);
         if (exists)
@@ -4892,7 +4905,7 @@ static int mpv_main(int argc, char *argv[])
     if (opts->shuffle)
         playlist_shuffle(mpctx->playlist);
 
-    mpctx->playlist->current = mp_resume_playlist(mpctx->playlist);
+    mpctx->playlist->current = mp_resume_playlist(mpctx->playlist, opts);
     if (!mpctx->playlist->current)
         mpctx->playlist->current = mpctx->playlist->first;
 

mpvcore/options.c

@@ -53,8 +53,6 @@ extern char *lirc_configfile;
 extern int mp_msg_color;
 extern int mp_msg_module;
 
-extern int dvd_speed; /* stream/stream_dvd.c */
-
 /* defined in demux: */
 extern const m_option_t demux_rawaudio_opts[];
 extern const m_option_t demux_rawvideo_opts[];
@@ -178,8 +176,6 @@ static const m_option_t scaler_filter_conf[]={
     {NULL, NULL, 0, 0, 0, 0, NULL}
 };
 
-extern char *dvd_device, *cdrom_device;
-
 extern double mf_fps;
 extern char * mf_type;
 extern const struct m_obj_list vf_obj_list;

stream/stream.h

@@ -257,8 +257,11 @@ int stream_check_interrupt(int time);
 
 bool stream_manages_timeline(stream_t *s);
 
+/* stream/stream_dvd.c */
 extern int dvd_title;
 extern int dvd_angle;
+extern int dvd_speed;
+extern char *dvd_device, *cdrom_device;
 
 extern int bluray_angle;
 extern char *bluray_device;

stream/stream_cdda.c

@@ -50,8 +50,6 @@
 
 #include "mpvcore/mp_msg.h"
 
-extern char *cdrom_device;
-
 typedef struct {
     cdrom_drive_t *cd;
     cdrom_paranoia_t *cdp;

stream/stream_dvd_common.h

@@ -23,11 +23,9 @@
 #include <inttypes.h>
 #include <dvdread/ifo_types.h>
 
-extern char *dvd_device;
 extern const char * const dvd_audio_stream_channels[6];
 extern const char * const dvd_audio_stream_types[8];
 
-extern int dvd_speed;
 void dvd_set_speed(char *device, unsigned speed);
 int mp_dvdtimetomsec(dvd_time_t *dt);
 

stream/stream_vcd.c

@@ -56,8 +56,6 @@
 #define vcd_close(priv) (close(((mp_vcd_priv_t*)priv)->fd))
 #endif
 
-extern char *cdrom_device;
-
 static int fill_buffer(stream_t *s, char* buffer, int max_len){
   if(s->pos > s->end_pos) /// don't past end of current track
     return 0;