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

Enable setting of global output samplerate on certain targets.

2013-07-06T02:22:04+00:00

Replaces the NATIVE_FREQUENCY constant with a configurable frequency.

The user may select 48000Hz if the hardware supports it. The default is
still 44100Hz and the minimum is 44100Hz. The setting is located in the
playback settings, under "Frequency".

"Frequency" was duplicated in english.lang for now to avoid having to
fix every .lang file for the moment and throwing everything out of sync
because of the new play_frequency feature in features.txt. The next
cleanup should combine it with the one included for recording and
generalize the ID label.

If the hardware doesn't support 48000Hz, no setting will be available.

On particular hardware where very high rates are practical and desireable,
the upper bound can be extended by patching.

The PCM mixer can be configured to play at the full hardware frequency
range. The DSP core can configure to the hardware minimum up to the
maximum playback setting (some buffers must be reserved according to
the maximum rate).

If only 44100Hz is supported or possible on a given target for playback,
using the DSP and mixer at other samperates is possible if the hardware
offers them.

Change-Id: I6023cf0c0baa8bc6292b6919b4dd3618a6a25622
Reviewed-on: http://gerrit.rockbox.org/479
Reviewed-by: Michael Sevakis 
Tested-by: Michael Sevakis

AS3525v1/v2:

2011-12-08T19:20:00+00:00

Fix problems with volume of recorded material by converting 14-bit samples to
16-bit. Remove duplicate samples from recorded data and support proper
samplerate since ADC runs 1/2 the codec clock. Support monitoring mono on both
output channels by feeding data manually to I2SOUT under the right conditions.

DMA is no longer used for recording since frames must be processed as described
above but it does allow full-duplex audio.

Miscellaneous change includes a proper constant (HW_SAMPR_DEFAULT) to reset the
hardware samplerate when recording is closed. PP5024 and AS3525 have different
default recording rates (22kHz and 44kHz respectively) but both have half-speed
ADC.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31180 a1c6a512-1295-4272-9138-f99709370657

Should clear up rest of red. Add a required #define in the config for c200. Fix up some preprocessing directives. Hope it's all taken care of now.

2010-06-26T10:37:41+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27141 a1c6a512-1295-4272-9138-f99709370657

Fix red. Thought I had REC_SAMPR_DEFAULT covered if not otherwise specified as different than 44.

2010-06-26T10:17:18+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27140 a1c6a512-1295-4272-9138-f99709370657

e200v1/c200v1: Implement limited samplerate switching. Rates 24kHz and below are being a bear as far as minor crackling at higher amplitude-- leave them out for the time being since no solution is currently evident. 48, 44, 32 (rec rates 24, 22, 16) seem perfectly fine. I'm betting c200 is ok to include because it uses the same setup as e200.

2010-06-26T10:07:17+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27139 a1c6a512-1295-4272-9138-f99709370657

Updated our source code header to explicitly mention that we are GPL v2 or

2008-06-28T18:10:04+00:00

later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657

e200: Add recording. Just from MIC right now and FM integration will happen soon. Most every bit of weirdness is nescessary and no problems seem to exist that the retailos doesn't exhibit too (namely noise when LCD is on when recording from MIC).

2007-06-05T07:03:30+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13557 a1c6a512-1295-4272-9138-f99709370657

Default HW_SAMPR_CAPS should be SAMPR_CAP_44, not 0.

2007-05-04T16:21:32+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13323 a1c6a512-1295-4272-9138-f99709370657

avoid using #if on undefined symbols, in preparation for -Wundef

2007-02-17T21:15:06+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12357 a1c6a512-1295-4272-9138-f99709370657

Forgot to use cvs add on a few new files in the fresh checkout I used. woops.

2006-11-06T18:18:05+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11453 a1c6a512-1295-4272-9138-f99709370657