A few patches from my audio patch queue.

Patches 1 - 2:
If a guest selects an unsupported sample rate, an error message is 
currently shown. The first patch takes care to suppress the error 
message and reports with the qemu_log_mask(LOG_UNIMP, ...) function that 
this is not supported. The second patch is needed because there are two 
code paths to reach the qemu_log_mask() function in the 
audio_pcm_sw_alloc_resources_* functions. The second path prints an 
additional error message up to now.

For more background information:
https://lists.nongnu.org/archive/html/qemu-devel/2022-10/msg04940.html

Patches 3 - 4:
General improvements.

Patches 5 - 9:
These patches remove the audio_calloc() function. The GLib g_new0 macro 
is a better replacement for audio_calloc() and we have one less 
audio_bug() function call site. There's one exception where g_malloc0() 
fits better.

Patches 10 - 11:
Audio playback and recording with the ALSA audio backend currently 
doesn't work well with the default audio settings.

Volker Rümelin (11):
   audio: log unimplemented audio device sample rates
   audio: don't show unnecessary error messages
   audio: rename hardware store to backend
   audio: remove unused #define AUDIO_STRINGIFY
   audio/mixeng: use g_new0() instead of audio_calloc()
   audio/alsaaudio: use g_new0() instead of audio_calloc()
   audio/audio_template: use g_malloc0() to replace audio_calloc()
   audio/audio_template: use g_new0() to replace audio_calloc()
   audio: remove audio_calloc() function
   alsaaudio: change default playback settings
   alsaaudio: reintroduce default recording settings

  audio/alsaaudio.c      | 27 ++++++++----------------
  audio/audio.c          | 26 +----------------------
  audio/audio_int.h      |  4 ----
  audio/audio_template.h | 48 ++++++++++++++++++++----------------------
  audio/mixeng.c         |  7 +-----
  5 files changed, 34 insertions(+), 78 deletions(-)

-- 
2.35.3