command: print track metadata in ${track-list}

Extract track metadata formatting out of loadfile.c to reuse in the
track-list property.

player/command.c

@@ -76,8 +76,6 @@
 #include "osdep/subprocess.h"
 #include "osdep/terminal.h"
 
-#include "core.h"
-
 #ifdef _WIN32
 #include <windows.h>
 #endif
@@ -2104,21 +2102,70 @@ static const char *track_type_name(struct track *t)
     return NULL;
 }
 
-
 static char *append_track_info(char *res, struct track *track)
 {
     res = talloc_strdup_append(res, track->selected ? list_current : list_normal);
     res = talloc_asprintf_append(res, "(%d) ", track->user_tid);
-    if (track->title)
-        res = talloc_asprintf_append(res, "'%s' ", track->title);
-    if (track->lang)
-        res = talloc_asprintf_append(res, "(%s) ", track->lang);
-    if (track->is_external)
-        res = talloc_asprintf_append(res, "(external) ");
+    res = talloc_strdup_append(res, mp_format_track_metadata(res, track));
 
     return res;
 }
 
+#define bstr_xappend0(ctx, dst, s) bstr_xappend(ctx, dst, bstr0(s))
+#define ADD_FLAG(ctx, dst, flag, first) do {                           \
+    bstr_xappend_asprintf(ctx, &dst, " %s%s", first ? "[" : "", flag); \
+    first = false;                                                     \
+} while(0)
+
+char *mp_format_track_metadata(void *ctx, struct track *t)
+{
+    struct sh_stream *s = t->stream;
+    bstr dst = {0};
+
+    if (t->title)
+        bstr_xappend_asprintf(ctx, &dst, " '%s'", t->title);
+
+    const char *codec = s ? s->codec->codec : NULL;
+    bstr_xappend_asprintf(ctx, &dst, " (%s", codec ? codec : "<unknown>");
+
+    if (s && s->codec->codec_profile)
+        bstr_xappend_asprintf(ctx, &dst, " [%s]", s->codec->codec_profile);
+    if (s && s->codec->disp_w)
+        bstr_xappend_asprintf(ctx, &dst, " %dx%d", s->codec->disp_w, s->codec->disp_h);
+    if (s && s->codec->fps && !t->image) {
+        char *fps = mp_format_double(ctx, s->codec->fps, 4, false, false, true);
+        bstr_xappend_asprintf(ctx, &dst, " %s fps", fps);
+    }
+    if (s && s->codec->channels.num)
+        bstr_xappend_asprintf(ctx, &dst, " %dch", s->codec->channels.num);
+    if (s && s->codec->samplerate)
+        bstr_xappend_asprintf(ctx, &dst, " %d Hz", s->codec->samplerate);
+    if (s && s->codec->bitrate) {
+        bstr_xappend_asprintf(ctx, &dst, " %d kbps", (s->codec->bitrate + 500) / 1000);
+    } else if (s && s->hls_bitrate) {
+        bstr_xappend_asprintf(ctx, &dst, " %d kbps", (s->hls_bitrate + 500) / 1000);
+    }
+    bstr_xappend0(ctx, &dst, ")");
+
+    bool first = true;
+    if (t->default_track)
+        ADD_FLAG(ctx, dst, "default", first);
+    if (t->forced_track)
+        ADD_FLAG(ctx, dst, "forced", first);
+    if (t->dependent_track)
+        ADD_FLAG(ctx, dst, "dependent", first);
+    if (t->visual_impaired_track)
+        ADD_FLAG(ctx, dst, "visual-impaired", first);
+    if (t->hearing_impaired_track)
+        ADD_FLAG(ctx, dst, "hearing-impaired", first);
+    if (t->is_external)
+        ADD_FLAG(ctx, dst, "external", first);
+    if (!first)
+        bstr_xappend0(ctx, &dst, "]");
+
+    return bstrto0(ctx, dst);
+}
+
 static int property_list_tracks(void *ctx, struct m_property *prop,
                                 int action, void *arg)
 {

player/command.h

@@ -20,6 +20,7 @@
 
 #include <stdbool.h>
 
+#include "core.h"
 #include "libmpv/client.h"
 #include "osdep/compiler.h"
 
@@ -121,4 +122,6 @@ void mark_seek(struct MPContext *mpctx);
 
 void mp_abort_cache_dumping(struct MPContext *mpctx);
 
+char *mp_format_track_metadata(void *ctx, struct track *t);
+
 #endif /* MPLAYER_COMMAND_H */

player/loadfile.c

@@ -238,14 +238,9 @@ static void uninit_demuxer(struct MPContext *mpctx)
 #define WHITE_CIRCLE "\xe2\x97\x8b"
 #define APPEND(s, ...) mp_snprintf_cat(s, sizeof(s), __VA_ARGS__)
 #define FILL(s, n) mp_snprintf_cat(s, sizeof(s), "%*s", n, "")
-#define ADD_FLAG(b, flag, first) do {           \
-    APPEND(b, " %s%s", first ? "[" : "", flag); \
-    first = false;                              \
-} while(0)
 
 static void print_stream(struct MPContext *mpctx, struct track *t, bool indent)
 {
-    struct sh_stream *s = t->stream;
     const char *tname = "?";
     const char *selopt = "?";
     const char *langopt = "?";
@@ -277,46 +272,10 @@ static void print_stream(struct MPContext *mpctx, struct track *t, bool indent)
     } else if (max_lang_length) {
         FILL(b, (int) strlen(" --alang= ") + max_lang_length);
     }
-    if (t->title)
-        APPEND(b, " '%s'", t->title);
 
-    const char *codec = s ? s->codec->codec : NULL;
-    APPEND(b, " (%s", codec ? codec : "<unknown>");
-    if (s && s->codec->codec_profile)
-        APPEND(b, " [%s]", s->codec->codec_profile);
-    if (s && s->codec->disp_w)
-        APPEND(b, " %dx%d", s->codec->disp_w, s->codec->disp_h);
-    if (s && s->codec->fps && !t->image) {
-        char *fps = mp_format_double(NULL, s->codec->fps, 4, false, false, true);
-        APPEND(b, " %s fps", fps);
-        talloc_free(fps);
-    }
-    if (s && s->codec->channels.num)
-        APPEND(b, " %dch", s->codec->channels.num);
-    if (s && s->codec->samplerate)
-        APPEND(b, " %d Hz", s->codec->samplerate);
-    if (s && s->codec->bitrate) {
-        APPEND(b, " %d kbps", (s->codec->bitrate + 500) / 1000);
-    } else if (s && s->hls_bitrate) {
-        APPEND(b, " %d kbps", (s->hls_bitrate + 500) / 1000);
-    }
-    APPEND(b, ")");
-
-    bool first = true;
-    if (t->default_track)
-        ADD_FLAG(b, "default", first);
-    if (t->forced_track)
-        ADD_FLAG(b, "forced", first);
-    if (t->dependent_track)
-        ADD_FLAG(b, "dependent", first);
-    if (t->visual_impaired_track)
-        ADD_FLAG(b, "visual-impaired", first);
-    if (t->hearing_impaired_track)
-        ADD_FLAG(b, "hearing-impaired", first);
-    if (t->is_external)
-        ADD_FLAG(b, "external", first);
-    if (!first)
-        APPEND(b, "]");
+    void *ctx = talloc_new(NULL);
+    APPEND(b, " %s", mp_format_track_metadata(ctx, t));
+    talloc_free(ctx);
 
     MP_INFO(mpctx, "%s\n", b);
 }