audio: add some setters for mp_audio, and require filters to use them

mp_audio has some redundant fields. Setters like mp_audio_set_format()
initialize these properly.

Also move the mp_audio struct to a the file audio.c.

We can remove a mysterious line of code from af.c:

    in.format |= af_bits2fmt(in.bps * 8);

I'm not sure if this was ever actually needed, or if it was some kind of
"make it work" quick-fix that works against the way things were supposed
to work. All filters etc. now set the format correctly, so if there ever
was a need for this code, it's definitely gone.

1 files changed, 3 insertions, 4 deletions

diff --git a/audio/filter/af_sinesuppress.c b/audio/filter/af_sinesuppress.c
index c9a77ab498..10f0b650ec 100644
--- a/audio/filter/af_sinesuppress.c
+++ b/audio/filter/af_sinesuppress.c
@@ -54,8 +54,8 @@ static int control(struct af_instance* af, int cmd, void* arg)
     // Sanity check
     if(!arg) return AF_ERROR;
 
-    af->data->rate   = ((struct mp_audio*)arg)->rate;
-    af->data->nch    = 1;
+    mp_audio_copy_config(af->data, (struct mp_audio*)arg);
+    mp_audio_set_num_channels(af->data, 1);
 #if 0
     if (((struct mp_audio*)arg)->format == AF_FORMAT_FLOAT_NE)
     {
@@ -65,8 +65,7 @@ static int control(struct af_instance* af, int cmd, void* arg)
     }// else
 #endif
     {
-	af->data->format = AF_FORMAT_S16_NE;
-	af->data->bps = 2;
+        mp_audio_set_format(af->data, AF_FORMAT_S16_NE);
 	af->play = play_s16;
     }