Rockbox

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Patches
  • Category Codecs
  • Assigned To No-one
  • Operating System All players
  • Severity Low
  • Priority Very Low
  • Reported Version Daily build (which?)
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Rockbox
Opened by Sean Bartell - 2011-08-22

FS#12240 - rbcodec refactoring part 1

Continuing from  FS#12204 , these patches remove some of the dependencies librbcodec has on the rest of Rockbox.

0001: puts equalizer settings in the parameters of dsp_set_eq_coefs, removing the need to access global_settings from dsp.c

0002: makes dsp_process yield each iteration instead of once each tick, which is tricky to do portably. If this is undesirable, I can work around it.

0003: moves some replaygain stuff around so dsp.c doesn't have to access global_settings.

0004: instead of dsp.c and tdspeed.c allocating buffers, buffers are allocated elsewhere and passed to dsp_timestretch_enable(). The necessary buffer size is determined by calling dsp_timestretch_get_buffer_size().

0005: replace get_audio_base_data_type() with audio_format_is_atomic(), removing a dependency on TYPE_PACKET_*.

0006: move autoresumable() to playback.c, removing another dependency on global_settings.

Nils Wallménius commented on 2011-08-27 12:16

in patch 0004 it looks like the code you added in settings_apply() can be run when for example loading a config which would cause problems (both from buffer alloc and the tdspeed_init() function that is marked with INIT_ATTR) it needs more guarding to only run at boot.

Michael Sevakis commented on 2011-08-28 07:59

Keep base data type and the DSP should not over-yield. It used to yield each iteration with was overkill. If these changes are for lib for preemtive threading, just kill the yields. I don't want regression nor functions to become overly specialized.

Edit: Nils was kind enough to remind me it's being made a lib that even the main rockbox build relies upon. I guess the reliance on the tick shouldn't be an issue in that case, and yields unneeded as a standalone.

Michael Sevakis commented on 2011-08-28 08:09

Booleans are horrendous things for the most part. Really, the lib should include data types, especially if the playback engine were to get lib-ized, which would be a good idea so that it can be front-ended with native UI. It needs to remain forward-looking instead of merely expedient in its implementation.

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