rockbox/firmware/export/audiohw.h, branch master

Document AUDIOHW_SETTING

2016-12-12T11:15:07+00:00

Everytime I use it, I get highly confused because it's complicated and
undocumented. The code is spread all over the place and some targets clearly
use incorrect values. This is the first step of a series to cleanup audio settings
and document it properly.

Change-Id: I20cb7af2bfa33986cb8b0bf8573f17a92227f893

Fix two typos in comments

2016-08-22T22:37:57+00:00

Change-Id: I39e42c5e4505e78711e30f8826b6760419434ca0

iBasso DX50/DX90: Major code cleanup and reorganization.

2015-02-02T20:57:55+00:00

Reorganization

- Separated iBasso devices from PLATFORM_ANDROID. These are now standlone
  hosted targets. Most device specific code is in the
  firmware/target/hosted/ibasso directory.
- No dependency on Android SDK, only the Android NDK is needed.
  32 bit Android NDK and Android API Level 16.
- Separate implementation for each device where feasible.

Code cleanup

- Rewrite of existing code, from simple reformat to complete reimplementation.
- New backlight interface, seperating backlight from touchscreen.
- Rewrite of device button handler, removing unneeded code and fixing memory
  leaks.
- New Debug messages interface logging to Android adb logcat (DEBUGF, panicf,
  logf).
- Rewrite of lcd device handler, removing unneeded code and fixing memory leaks.
- Rewrite of audiohw device handler/pcm interface, removing unneeded code and
  fixing memory leaks, enabling 44.1/48kHz pthreaded playback.
- Rewrite of power and powermng, proper shutdown, using batterylog results
  (see http://gerrit.rockbox.org/r/#/c/1047/).
- Rewrite of configure (Android NDK) and device specific config.
- Rewrite of the Android NDK specific Makefile.

Misc

- All plugins/games/demos activated.
- Update tinyalsa to latest from https://github.com/tinyalsa/tinyalsa.

Includes

- http://gerrit.rockbox.org/r/#/c/993/
- http://gerrit.rockbox.org/r/#/c/1010/
- http://gerrit.rockbox.org/r/#/c/1035/

Does not include http://gerrit.rockbox.org/r/#/c/1007/ due to new backlight
interface and new option for hold switch, touchscreen, physical button
interaction.

Rockbox needs the iBasso DX50/DX90 loader for startup, see
http://gerrit.rockbox.org/r/#/c/1099/

The loader expects Rockbox to be installed in /mnt/sdcard/.rockbox/. If
/mnt/sdcard/ is accessed as USB mass storage device, Rockbox will exit
gracefully and the loader will restart Rockbox on USB disconnect.

Tested on iBasso DX50.
Compiled (not tested) for iBasso DX90.
Compiled (not tested) for PLATFORM_ANDROID.

Change-Id: I5f5e22e68f5b4cf29c28e2b40b2c265f2beb7ab7

Introduce HiFi E.T. MA8/MA8C ports.

2013-11-05T05:59:45+00:00

HiFi E.T. MA8 is almost the same as MA9 except
another DAC(pcm1792 in ma8, df1704 in ma9).

MA8 has ILI9342 lcd, MA8C has ILI9342C lcd.

Change-Id: If2ac04f5a3382590b2a392c46286559f54b2ed6a

Add DAC's oversampling filter roll-off selection to sound settings.

2013-05-24T07:18:16+00:00

Change-Id: I1258ba50dd9308f49d97965562f3a423c9bfb785

Remove dsp_callback because DSP is now library code, not app code.

2013-05-23T18:25:37+00:00

Yep, nope, not necessary anymore. Just call functions directly.

Change-Id: I21dc35f8d674c2a9c8379b7cebd5613c1f05b5eb

Introduce HiFi E.T MA9 port.

2013-05-06T10:09:24+00:00

Change-Id: I79aadc958fd5222f26f91ed127f8c6fb2c465dc2

Provide high resolution volume and prescaler to hosted targets.

2013-04-27T04:59:27+00:00

HAVE_SW_VOLUME_CONTROL is required and at this time only affects the
SDL targets using pcm-sdl.c.

Enables balance control in SDL targets, unless mono volume is in use.

Compiles software volume control as unbuffered when
PCM_SW_VOLUME_UNBUFFERED is defined. This avoids the overhead and
extra latency introduced by the double buffer when it is not needed.
Use this config when the target's PCM driver is buffered and sufficient
latency exists to perform safely the volume scaling.

Simulated targets that are double-buffered when made as native targets
remain so in the sim in order to run the same code.

Change-Id: Ifa77d2d3ae7376c65afecdfc785a084478cb5ffb
Reviewed-on: http://gerrit.rockbox.org/457
Reviewed-by: Michael Sevakis 
Tested-by: Michael Sevakis

Bass/Treble caps should exist implicitly with HAVE_SW_TONE_CONTROLS.

2013-04-25T20:37:12+00:00

If AUDIOHW_CAPS is defined without explicit BASS_CAP/TREBLE_CAP while
HAVE_SW_TONE_CONTROLS is defined, AUDIOHW_HAVE_BASS/TREBLE should be
defined or otherwise the tone controls won't show up. TREBLE/BASS were
being defined if AUDIOHW_CAPS was NOT defined, but the same rule should
apply if the codec needs to specify other caps but doesn't use hardware
tone controls.

(I'm surprised noone noticed some settings gone missing :-)

Change-Id: I85b5c467bab07bb62362a0dc2d582267ac2d8ec9

Do some cleanup, adjustment and a couple fixes to recent sound changes.

2013-04-23T00:38:17+00:00

* SOUND_x enum can be generated by audiohw_settings.h along with settings
entries and sound_val2phys.

* VOLUME_MIN and VOLUME_MAX are no longer necessary within sound.c. If
you need them, they are for target-defined purposes.

* Fix up SDL volume implementation in sdl.c. Move sim volume calculation
code to pcm-sdl.c.

* Min trigger tresholds were based upon VOLUME_MIN for some reason.
These setting have nothing to do with playback volume. Since it is no
longer present, set these at -89dB which is the minimum peak meter
sensitivity setting.

* Fix an oversight in wm8758.c. I forgot to add the dB->register
conversion to audiohw_set_volume.

Change-Id: Ie1df33f1793eee75e6793f16bc7bddd16edb7f75