[iiwusynth-devel] Lates CVS changes

[Peter Hanappe]

Hi all,

I did a pretty big CVS commit this evening. An overview follows.  The
changes have only been tested on Linux on i386 hardware.

Hope I didn't break too much stuff!

Peter

----

New features:

- Multi-channel audio output: currently only the JACK audio driver
  outputs multi-channel audio. Other drivers work as
  before. Application developers can use the new fields in the
  'iiwu_settings_t' structure and the function
  'iiwu_synth_nwrite_float' to get multi-channel audio.

- Variable number of MIDI channels: The number of MIDI channels can be
  set in the 'iiwu_settings_t' structure.

- Unload soundfonts: 'iiwu_synth_sfunload' has become smarter. If a
  soundfont is still being used, a timer thread will unload the
  soundfont later. On MacOS 9, the synth will try to unload the
  soundfont in subsequent calls to 'sfload' and 'sfunload'.

- CPU load: Use 'iiwu_synth_get_cpu_load' to get an estimation of the
  CPU load (in %). Should work on Windows, not yet available on
  PowerPC.

Fixes:

- Pan should work correctly.

- chorus_set_xyz: The function does not return an error for
  out-o-range values but clips them to the [min-max] range.

MIDI stuff:

- Implemented ALL_SOUNDS_OFF (MIDI CC 120)

- Implemented ALL_CTRL_OFF (MIDI CC 121)

- Reviewed SYSTEM_RESET message (iiwu_synth_system_reset): all sounds
  are turned off immediately, reverb & chorus delay lines are cleared,
  MIDI controllers on all channels are reset to defaults

API changes:

- iiwu_sample_t: Added 'refcount' to indicate how many voices use the
  sample. Removed the 'valid' field.

- The callback free() in the structure iiwu_sfont_t should return a
  non-zero value if some of it's samples are still in use.

- iiwu_settings_t: Removed 'flags'. It has been replaced by a series
  of fields: 'with_reverb', 'with_chorus', 'create_audio_thread', ...

- new_iiwu_timer: New creation flag 'auto_destroy'


iiwusynth, the application:

- Prints out welcome and warranty message

- Shows a 'prompt'

- New options:
  --midi-channels, -K
  --audio-channels, -L