commands: add show_tracks_osd command to display audio and subtitle tracks on OSD

The command lists the audio and subtitle tracks in the current file on the
OSD. It also marks the currently active streams.
Video streams are not shown, as files with more than one video stream are
exceedingly rare.

1 files changed, 82 insertions, 0 deletions

diff --git a/command.c b/command.c
index f7a0529eeb..cfb8d0ec17 100644
--- a/command.c
+++ b/command.c
@@ -2844,6 +2844,85 @@ static void show_chapters_on_osd(MPContext *mpctx)
     talloc_free(res);
 }
 
+static void show_tracks_on_osd(MPContext *mpctx)
+{
+    struct MPOpts *opts = &mpctx->opts;
+    char *res = NULL;
+    const char *IND = "";
+    int n;
+    int cnt = 0;
+    struct sh_audio *cur_a;
+    struct sh_sub *cur_s;
+    demux_stream_t *d_sub;
+    demuxer_t *demuxer = mpctx->demuxer;
+
+    if (!demuxer)
+        return;
+
+    cur_a = mpctx->sh_audio;
+    d_sub = mpctx->d_sub;
+    cur_s = d_sub && opts->sub_id >= 0 ? d_sub->sh : NULL;
+
+    for (n = 0; n < MAX_V_STREAMS; n++) {
+        struct sh_video *v = demuxer->v_streams[n];
+        if (v) {
+            cnt++;
+        }
+    }
+    if (cnt > 1)
+        res = talloc_asprintf_append(res, "(Warning: more than one video stream.)\n");
+
+#define STD_TRACK_HDR(st, id)                                   \
+    res = talloc_asprintf_append(res, "%s(%d) ", IND, st->id);  \
+    if (st->title) {                                            \
+        res = talloc_asprintf_append(res, "'%s' ", st->title);  \
+    }                                                           \
+    if (st->lang) {                                             \
+        res = talloc_asprintf_append(res, "(%s) ", st->lang);   \
+    }
+
+    for (n = 0; n < MAX_A_STREAMS; n++) {
+        struct sh_audio *a = demuxer->a_streams[n];
+        if (a) {
+            cnt++;
+            if (a == cur_a)
+                res = talloc_asprintf_append(res, "> ");
+            STD_TRACK_HDR(a, aid)
+            if (a == cur_a)
+                res = talloc_asprintf_append(res, "<");
+            res = talloc_asprintf_append(res, "\n");
+        }
+    }
+
+    res = talloc_asprintf_append(res, "\n");
+
+    for (n = 0; n < MAX_S_STREAMS; n++) {
+        struct sh_sub *s = demuxer->s_streams[n];
+        if (s) {
+            cnt++;
+            if (s == cur_s)
+                res = talloc_asprintf_append(res, "> ");
+            STD_TRACK_HDR(s, sid)
+            char *type = "?";
+            switch (s->type) {
+            case 't': type = "SRT"; break;
+            case 'v': type = "VOB"; break;
+            case 'a': type = NULL; break; //"ASS/SSA";
+            }
+            if (type)
+                res = talloc_asprintf_append(res, " [%s]", type);
+            if (s == cur_s)
+                res = talloc_asprintf_append(res, "<");
+            res = talloc_asprintf_append(res, "\n");
+        }
+    }
+
+#undef STD_TRACK_HDR
+
+    set_osd_msg(OSD_MSG_TEXT, 1, opts->osd_duration, "%s", res);
+    talloc_free(res);
+}
+
 void run_command(MPContext *mpctx, mp_cmd_t *cmd)
 {
     struct MPOpts *opts = &mpctx->opts;
@@ -3663,6 +3742,9 @@ void run_command(MPContext *mpctx, mp_cmd_t *cmd)
     case MP_CMD_SHOW_CHAPTERS:
         show_chapters_on_osd(mpctx);
         break;
+    case MP_CMD_SHOW_TRACKS:
+        show_tracks_on_osd(mpctx);
+        break;
 
     default:
         mp_msg(MSGT_CPLAYER, MSGL_V,