demux_lavf: get codec info from AVCodecParameters

This allows displaying codec info for all tracks without selecting the
track.

common/av_common.c

@@ -421,3 +421,19 @@ void mp_codec_info_from_av(const AVCodecContext *avctx, struct mp_codec_params *
     c->decoder = avctx->codec->name;
     c->decoder_desc = avctx->codec->long_name;
 }
+
+void mp_codec_info_from_avcodecpar(const AVCodecParameters *avcodecpar, struct mp_codec_params *c)
+{
+    const AVCodec *codec = avcodec_find_decoder(avcodecpar->codec_id);
+    const AVCodecDescriptor *desc = avcodec_descriptor_get(avcodecpar->codec_id);
+    c->codec = mp_codec_from_av_codec_id(avcodecpar->codec_id);
+    if (desc)
+        c->codec_desc = desc->long_name;
+    if (codec) {
+        c->decoder = codec->name;
+        c->decoder_desc = codec->long_name;
+        c->codec_profile = av_get_profile_name(codec, avcodecpar->profile);
+    }
+    if (!c->codec_profile)
+        c->codec_profile = avcodec_profile_name(avcodecpar->codec_id, avcodecpar->profile);
+}

common/av_common.h

@@ -52,5 +52,6 @@ int mp_set_avopts(struct mp_log *log, void *avobj, char **kv);
 int mp_set_avopts_pos(struct mp_log *log, void *avobj, void *posargs, char **kv);
 void mp_free_av_packet(AVPacket **pkt);
 void mp_codec_info_from_av(const AVCodecContext *avctx, struct mp_codec_params *c);
+void mp_codec_info_from_avcodecpar(const AVCodecParameters *avcodecpar, struct mp_codec_params *c);
 
 #endif

demux/demux_lavf.c

@@ -820,7 +820,7 @@ static void handle_new_stream(demuxer_t *demuxer, int i)
 
     if (sh) {
         sh->ff_index = st->index;
-        sh->codec->codec = mp_codec_from_av_codec_id(codec->codec_id);
+        mp_codec_info_from_avcodecpar(codec, sh->codec);
         sh->codec->codec_tag = codec->codec_tag;
         sh->codec->lav_codecpar = avcodec_parameters_alloc();
         if (sh->codec->lav_codecpar)