pkarashchenko commented on code in PR #1440:
URL: https://github.com/apache/nuttx-apps/pull/1440#discussion_r1037706680


##########
include/system/nxplayer.h:
##########
@@ -39,6 +39,14 @@
  * Public Type Declarations
  ****************************************************************************/
 
+struct nxplayer_dec_ops_s
+{
+  int format;
+  CODE int (*pre_parse)(int fd, uint32_t *samplerate,
+                   uint8_t *chans, uint8_t *bps);

Review Comment:
   ```suggestion
     CODE int (*pre_parse)(int fd, FAR uint32_t *samplerate,
   -                       FAR uint8_t *chans, FAR uint8_t *bps);
   
   ```



##########
include/system/nxplayer.h:
##########
@@ -72,6 +80,8 @@ struct nxplayer_s
   uint16_t    treble;         /* Treble as a whole % */
   uint16_t    bass;           /* Bass as a whole % */
 #endif
+
+  const struct nxplayer_dec_ops_s *ops;

Review Comment:
   ```suggestion
     FAR const struct nxplayer_dec_ops_s *ops;
   ```



##########
system/nxplayer/nxplayer.c:
##########
@@ -121,6 +131,27 @@ static const struct nxplayer_ext_fmt_s g_known_ext[] =
 
 static const int g_known_ext_count = sizeof(g_known_ext) /
                     sizeof(struct nxplayer_ext_fmt_s);
+
+static const struct nxplayer_dec_ops_s g_dec_mp3 =
+{
+  AUDIO_FMT_MP3,
+  nxplayer_parse_mp3,
+  nxplayer_fill_mp3
+};
+
+static const struct nxplayer_dec_ops_s g_dec_pcm =
+{
+  AUDIO_FMT_PCM,
+  NULL,
+  nxplayer_fill_pcm
+};
+
+static const struct nxplayer_dec_ops_s g_dec_s[] =

Review Comment:
   can we use reference to `g_dec_pcm` and `g_dec_mp3` instead of copy?



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