Following the discussion about an API to pin and unpin preset samples in the sample cache here:
https://lists.nongnu.org/archive/html/fluid-dev/2020-10/msg00016.html
Short explanation of the change:
Only the default loader currently supports dynamic sample loading, so I thought it might be a good idea to keep the changes for this feature mostly contained in the default loader as well. I've added two new preset notify flags (FLUID_PRESET_PIN and FLUID_PRESET_UNPIN) that are handled by the preset->notify callback and trigger the loading and possibly unloading of the samples.
Previously, CMake on OS/2 exported all the symbols unconditionally. Now
it exports necessary symbols only. As a result, it's necessary to
define FLUIDSYNTH_API correctly.
Addresses #678
I don't see any 'allocation' of preset. And ALL public synth functions have a mutex lock which might potentially block when called from synth context, but only then if the client app pessimizes this situation by extensively calling the synth from outside the synth context.
Access to field 'zone' results in a dereference of a null pointer (loaded from variable 'prev_preset'), if `size` is negative. Problem is: Parameter `size` is `chunk.size` and should be unsigned.
Originally, I have only marked it deprecated. But since we have an SOVERSION bump next release and because this function was only meant for internal usage, I think it's safe to remove it right now.
This PR addresses #665.
1) Add new functions for multi channels support: `fluid_synth_write_float_channels()`, `fluid_synth_write_s16_channels()`
2) `dsound` and `waveout` driver make use of this support. tested on 2 audio devices:
- creative SB Live! (6 channels).
- Realtek: ALC889A (8 channels).
Currently, all fx unit output (in mix mode) are mapped to the `first buffer`.
This is not appropriate for synth.audio-groups > 1
This PR allows the mapping of fx output based on `fx unit index` and `synth.audio-groups` value.
This allows us to get the `fx output `mixed to the respective `buffer` on which a `MIDI channel` is mapped.
For example: with `synth.audio-groups = 3` and `synth.effect-groups = 3`:
- MIDI chan 0 (dry + fx0) is mapped to buf 0
- MIDI chan 1 (dry + fx1) is mapped to buf 1
- MIDI chan 2 (dry + fx2) is mapped to buf 2
It could be that during runtime an older version of libinstpatch is used than the one fluidsynth was compiled against. In this case, libinstpatch will fail to load DLS fonts, because libinstpatch's initialization semantics don't match those compiled into fluidsynth.
