d81db0e798
preemphasis is now configurable from CLI
...
by adding -preemph [eu/us/{cutoff freq}] to your Pi FM parameters, you can now select the right preemphasis for your region
2016-03-12 19:05:39 +01:00
2cc5d96e62
switched the filter to a much better sounding one
...
previouse filter was described by:
y[n] = bx[n]-bx[n-1]+ay[n-1]
filter is now described by:
y(n) = x(n) - a x(n-1)
with 'a' = old 'b'
even i have no idea if that coefficient 'a' is selected correctly, it sounds much better than before
2016-03-12 18:16:45 +01:00
e0cc4fe10a
low-pass filter now has 22050Hz cutoff
...
Might not apply to the fm standards, but since you are not supposed to use it publicly, it doesn't matter
2016-03-12 17:36:47 +01:00
3629b9ec46
Code cleanup
...
whitespaces instead of tabs, see ad766936dc
2016-03-12 17:32:38 +01:00
ad766936dc
Initial implementation of aa preemphasis
...
Implemented as a first-order highpass filter
2016-03-12 00:57:21 +01:00
0fd4c1c030
Add tip to README
2016-02-07 16:05:29 +01:00
c0d45323e4
Make the program more resilient to different configurations wrt the mailbox device
2015-09-06 20:02:31 +00:00
293b8f2000
Frequency range compatible with the Japanese band
2015-09-05 18:45:31 +00:00
6d8fe70793
Kill the carrier upon exit
2015-09-05 18:38:52 +00:00
589e825b33
Add fully functional support for the Raspberry Pi 2
2015-09-05 15:39:37 +00:00
001ecb3e09
Fixes
2015-09-04 20:02:05 +02:00
2d316cf121
Fixes
2015-09-04 20:01:10 +02:00
c0e9095c87
Clarification: what PiFmRds is not, legal aspects.
2015-09-04 19:59:02 +02:00
b3de5ab29d
Now compiles on the Raspberry Pi 2, although it does not work
2015-08-31 20:34:25 +00:00
f8613175ae
Support for toggling the Traffic Announcement (TA) flag at run-time
2014-11-01 12:00:48 +01:00
aa4d85450d
Cleanly stop the DMA engine even when no file is found. Following the bug report by Github user CRC-Mismatch
2014-10-19 19:41:21 +02:00
0bf57f9ce0
Merge pull request #10 from Stealthii/float-ppm
...
Have ppm use float precision
2014-09-21 12:06:28 +02:00
16c9f1aed8
Have ppm use float precision
2014-08-04 01:21:31 +01:00
a985b7db02
Remove unnecessary debug display
2014-06-22 22:35:27 +02:00
46d81c12fe
Include string.h (not strings.h) to avoid warning about implicit declaration of strcmp
2014-06-22 21:16:11 +02:00
c73e0a2079
Now generates clock time (CT) information once per minute
2014-06-22 18:58:52 +02:00
9a819e5001
Safely exits when it is impossible to seek back in the audio file
2014-06-22 18:00:38 +02:00
c67306ea9b
More documentation fixes
2014-05-04 18:21:40 +02:00
0ac16eff52
Documentation fixes
2014-05-04 18:20:49 +02:00
20a56c47b0
Add the ability to receive commands on a named pipe
2014-05-04 12:41:28 +02:00
4fdd59327b
Platform-aware Makefile
2014-04-28 19:38:53 +02:00
921d60b0de
Fix the README
2014-04-28 19:28:06 +02:00
bf21074ca4
Fix the README
2014-04-28 19:21:42 +02:00
9a6ac7c310
Add support for piping audio data to Pi-FM-RDS' standard input
2014-04-28 19:17:10 +02:00
d199a74b2a
Add compilation options to use the Pi's FPU and vector unit. This lessens CPU usage greatly
2014-04-19 23:25:13 +02:00
aa9d43f4ae
Fix in the README
2014-04-14 18:56:35 +02:00
7c0bc17188
Updated README
2014-04-14 18:53:38 +02:00
b6ba9fb12a
Better stereo sample file
2014-04-14 18:28:28 +02:00
7efee690b3
Fix 19kHz stereo pilot level
2014-04-14 18:27:02 +02:00
93fc47c555
pi_fm_rds.c now uses fm_mpx.c, but stereo not yet functional
2014-04-14 18:11:36 +02:00
dad13529a3
Better handling of command line in rds_wav.c
2014-04-14 17:32:04 +02:00
e758ee63a0
Functional rds_wav that generates stereo multiplex signals
2014-04-14 17:26:56 +02:00
e1defb48e6
Started working on generating a complete FM multiplex
2014-04-14 01:03:32 +02:00
901c975ec6
Improved README
2014-04-08 23:37:01 +02:00
05d64a36e2
Improved README
2014-04-07 19:56:27 +02:00
e5a7f19065
Documentation++
2014-04-06 22:45:36 +02:00
cb1d10e331
Documentation++
2014-04-06 22:38:53 +02:00
5a02d1ab31
Documentation++
2014-04-06 22:33:52 +02:00
bfd74170bc
Documentation++
2014-04-06 22:27:42 +02:00
f5a6b4f84e
Documentation++
2014-04-06 22:26:33 +02:00
1d61607b6a
Documentation++
2014-04-06 22:26:06 +02:00
f41de0468e
Documentation++
2014-04-06 22:06:32 +02:00
61351e76bb
Documentation++
2014-04-06 21:44:42 +02:00
7897110a82
Documentation++
2014-04-06 21:39:33 +02:00
a7a9329ceb
More work on README
2014-04-06 20:09:16 +02:00
Florian Schöck
Christophe Jacquet
Daniel Porter
Eric Limpens