RTL-SDR support

I was wondering how much effort would take to port the rtl-sdr libraries? Requirements are quite sparse, namely: libusb, cmake, ninja – all of them are present in Haiku. I’m no developer and haven’t touched code in years but I’m willing to give it a go, unless someone with more experience can chime in (and do it in 1/3 time it’ll take me).

This may possibly open an entire category of usage scenarios, starting with SDR apps, and random things like DAB receiving or astronomic/weather observation. All things that resonate well with a media-centric OS like Haiku, methinks.

Opinions, everyone?

3 Likes

That sounds great! Go for it!

I will have to investigate the links you gave to understand what SDR actually is…

SDR=Software Defined Radio? RTL=RunTime LIbrary? DAB=Digital Audio Broadcasting? Please define terms before assuming everybody knows what you’re talking about.

2 Likes

No need for such hostility. Besides, that’s why I linked those terms.

rtl-sdr is a widely deployed library/tool to enable cheap DVB-T receivers like this one, to be repurposed as way more capable/costly SDR receivers. These dongles are EXTREMELY popular in the amateur radio world (and even commercially), and useful for many purposes – like the links I wrote about.

Software-defined radio is exactly what the name implies, a radio receiver implemented almost entirely in code, with a minimum of actual radio hardware. Such code can be a PC program, an FPGA implementation, etc. For people interested, this link does a far better job than me explaining all the in-and-outs.

rtl-sdr is available for every major OS from Linux to macOS, Windows, Android, *BSD etc. I believe Haiku would greatly benefit from having it, too.

1 Like

I didn’t mean to be perceived as hostile. I just ventured a few guesses of what it might stand for. I have an uncle with an SDR set that he’s never used. I was just wondering if that is what you were talking about.

1 Like

I think you having experience with this sort of hardware and likely owning it will be help, if you want to port it then go for it!

I’d be interested in this on Haiku for sure. I have a RTL-2832U to do testing.

1 Like

I followed that link and it’s really interesting. :slight_smile: Thanks

For me, SDR stands for Special Drawing Right, and RTL is a French or German broadcaster. Like you, Mr Crow, I had absolutely no idea what the original poster (OP) was talking about.
When people start a topic on a relatively arcane subject, it’s always a good idea to spell things out in full, and then use initials subsequently.
And when, Mr OP, people ask for clarification, please don’t assume hostility. SamuraiCrow was simply trying to understand.
BTW, sounds like a good project. Good luck.

Radio Television Luxemburg

should be nice to have flightradar24 :slight_smile:

3 Likes

Are you sure it’s not Lesotho?

That much is true, I should’ve done that. But again, that’s why I left some links for clarification on the subject. It was lacking and that’s on me :slight_smile:

I’ll try! For now I’m familiarizing myself with haikuporter, and found this guide to be an excelent intro. Let’s see what I can do.

As a quick test I installed libusb_examples, which contains some tools to poke at USB devices.

~/Dev/rtl-sdr/build> libusb-test-libusb 
..
.. <snip>
..
Dev (bus 5, device 101): 0000 - 0000 speed: Unknown
  Manufacturer:              HAIKU Inc.
  Product:                   EHCI RootHub
Dev (bus 5, device 1): 0BDA - 2838 speed: Unknown
  Manufacturer:              Realtek
  Product:                   RTL2838UHIDIR
~/Dev/rtl-sdr/build> libusb-example-xusb -i 0bda:2838
Using libusb v1.0.26.11724

Opening device 0BDA:2838...
             speed: Unknown

Reading device descriptor:
            length: 18
      device class: 0
               S/N: 3
           VID:PID: 0BDA:2838
         bcdDevice: 0100
   iMan:iProd:iSer: 1:2:3
          nb confs: 1

libusb: error [Do] failed control transfer
libusb: error [haiku_handle_transfer_completion] error in transfer
libusb: error [libusb_get_bos_descriptor] failed to read BOS (-1)
Reading BOS descriptor: no descriptor

Reading first configuration descriptor:
              total length: 34
         descriptor length: 9
             nb interfaces: 2
              interface[0]: id = 0
interface[0].altsetting[0]: num endpoints = 1
   Class.SubClass.Protocol: FF.FF.FF
       endpoint[0].address: 81
           max packet size: 0200
          polling interval: 00
              interface[1]: id = 1
interface[1].altsetting[0]: num endpoints = 0
   Class.SubClass.Protocol: FF.FF.FF

Kernel driver attached for interface 0: -12

Claiming interface 0...

Kernel driver attached for interface 1: -12

Claiming interface 1...

Reading string descriptors:
   String (0x01): "Realtek"
   String (0x02): "RTL2838UHIDIR"
   String (0x03): "00000001"

libusb: error [Do] failed control transfer
libusb: error [haiku_handle_transfer_completion] error in transfer
Reading OS string descriptor: no descriptor

Releasing interface 0...
Releasing interface 1...
Closing device...

Seems libusb picks the dongle just fine. But I wonder about those transfer errors…

2 Likes

Hello,

My experience with libusb is that there is some bug in the Haiku backend making it a bit unreliable. However, despite hours of looking over the code and fixing some bugs, I still didn’t find exactly why.

The Haiku provided “USB Kit” has a generally similar API, and works without any problems. But adjusting apps to it requires rewriting some code.

4 Likes

That looks doable, seeing as rtl-sdr can also work with WinUSB and libusbK on Windows, apart from libusb-win32. But let’s see how far we can push Haiku’s libusb without patching code 1st.

I’m playing with a recipe for x86_64, iterating whenever I find errors (soooo many :face_with_peeking_eye:) and missing dependencies. I’m at a point where most of them are met, the devenv gets correctly setup (?) and code begins to compile… just begins though. Seems to be choking on “undefined” references.

~/Dev/haikuports/net-wireless/rtl_sdr> haikuporter -S rtl_sdr-0.6.0
Checking if any dependency-infos need to be updated ...
        updating dependency infos of rtl_sdr-0.6.0
Looking for stale dependency-infos ...
----------------------------------------------------------------------
net-wireless::rtl_sdr-0.6.0
        /boot/home/Dev/haikuports/net-wireless/rtl_sdr/rtl_sdr-0.6.0.recipe
----------------------------------------------------------------------

Downloading: https://github.com/osmocom/rtl-sdr/archive/142325a93c6ad70f851f43434acfdf75e12dfe03.tar.gz ...
--2023-01-24 01:52:04--  https://github.com/osmocom/rtl-sdr/archive/142325a93c6ad70f851f43434acfdf75e12dfe03.tar.gz
Resolviendo github.com... 20.201.28.151
Conectando con github.com[20.201.28.151]:443... conectado.
Petición HTTP enviada, esperando respuesta... 302 Found
Localización: https://codeload.github.com/osmocom/rtl-sdr/tar.gz/142325a93c6ad70f851f43434acfdf75e12dfe03 [siguiendo]
--2023-01-24 01:52:04--  https://codeload.github.com/osmocom/rtl-sdr/tar.gz/142325a93c6ad70f851f43434acfdf75e12dfe03
Resolviendo codeload.github.com... 20.201.28.149
Conectando con codeload.github.com[20.201.28.149]:443... conectado.
Petición HTTP enviada, esperando respuesta... 200 OK
Longitud: no especificado [application/x-gzip]
Grabando a: «/boot/home/Dev/haikuports/net-wireless/rtl_sdr/download/142325a93c6ad70f851f43434acfdf75e12dfe03.tar.gz»
     0K ..                                                     531K=0,2s
2023-01-24 01:52:05 (531 KB/s) - «/boot/home/Dev/haikuports/net-wireless/rtl_sdr/download/142325a93c6ad70f851f43434acfdf75e12dfe03.tar.gz» guardado [134261]
Validating checksum of 142325a93c6ad70f851f43434acfdf75e12dfe03.tar.gz
Unpacking source of 142325a93c6ad70f851f43434acfdf75e12dfe03.tar.gz
Inicializado repositorio Git vacío en /boot/home/Dev/haikuports/net-wireless/rtl_sdr/work-0.6.0/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/.git/
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----- Package Info ----------------
header size:                     80
heap size:                      972
TOC size:                        41
package attributes size:       1370
total size:                    1052
-----------------------------------
waiting for build package rtl_sdr-0.6.0-1 to be activated
Building ...
libtoolize: putting auxiliary files in '.'.
libtoolize: copying file './ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
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configure.ac:16: warning: The macro `AC_PROG_LIBTOOL' is obsolete.
configure.ac:16: You should run autoupdate.
m4/libtool.m4:99: AC_PROG_LIBTOOL is expanded from...
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configure.ac:28: You should run autoupdate.
./lib/autoconf/headers.m4:704: AC_HEADER_STDC is expanded from...
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Makefile.am:4: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
src/Makefile.am:6: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
src/Makefile.am: installing './depcomp'
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configure: creating ./config.status
config.status: creating librtlsdr.pc
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config.status: executing depfiles commands
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configure: WARNING: unrecognized options: --disable-ldconfig
echo UNKNOWN > .version-t && mv .version-t .version
make  all-recursive
make[1]: Entering directory '/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03'
Making all in include
make[2]: Entering directory '/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/include'
make[2]: Nothing to be done for 'all'.
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Making all in src
make[2]: Entering directory '/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src'
  CC       rtl_sdr.o
  CC       librtlsdr.lo
  CC       tuner_e4k.lo
  CC       tuner_fc0012.lo
  CC       tuner_fc0013.lo
  CC       tuner_fc2580.lo
  CC       tuner_r82xx.lo
librtlsdr.c: In function 'rtlsdr_open':
librtlsdr.c:1447:24: warning: integer overflow in expression '-2147483648' of type 'int' results in '-2147483648' [-Woverflow]
 1447 |                 return -ENOMEM;
      |                        ^
librtlsdr.c: In function '_rtlsdr_alloc_async_buffers':
librtlsdr.c:1798:40: warning: integer overflow in expression '-2147483648' of type 'int' results in '-2147483648' [-Woverflow]
 1798 |                                 return -ENOMEM;
      |                                        ^
  CC       rtl_tcp.o
  CC       rtl_test.o
  CC       rtl_fm.o
  CC       rtl_eeprom.o
  CC       rtl_adsb.o
  CC       rtl_power.o
  CC       convenience/convenience.o
  CCLD     librtlsdr.la
  CCLD     rtl_sdr
  CCLD     rtl_tcp
  CCLD     rtl_test
  CCLD     rtl_fm
  CCLD     rtl_eeprom
  CCLD     rtl_adsb
  CCLD     rtl_power
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: rtl_tcp.o: in function `tcp_worker':
/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:240: undefined reference to `send'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: rtl_tcp.o: in function `command_worker':
/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:305: undefined reference to `recv'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: rtl_tcp.o: in function `main':
/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:539: undefined reference to `getaddrinfo'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:557: undefined reference to `socket'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:562: undefined reference to `setsockopt'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:563: undefined reference to `setsockopt'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:565: undefined reference to `bind'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:551: undefined reference to `getnameinfo'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:585: undefined reference to `listen'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:597: undefined reference to `accept'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:602: undefined reference to `setsockopt'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:604: undefined reference to `getnameinfo'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:620: undefined reference to `send'
/boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/11.2.0/../../../../x86_64-unknown-haiku/bin/ld: /sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src/rtl_tcp.c:544: undefined reference to `gai_strerror'
collect2: error: ld returned 1 exit status
Makefile:554: recipe for target 'rtl_tcp' failed
make[2]: *** [rtl_tcp] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03/src'
Makefile:494: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/sources/rtl-sdr-142325a93c6ad70f851f43434acfdf75e12dfe03'
Makefile:380: recipe for target 'all' failed
make: *** [all] Error 2
Warning: Command '['bash', '-c', '. /wrapper-script']' returned non-zero exit status 2.
Error: Build has failed - stopping.
~/Dev/haikuports/net-wireless/rtl_sdr>

And that’s where I left before sleep last night.

You need to link to -lnetwork to use the network APIs. There are probably several examples of patches doing this in other haikuports recipes.

From the warning messages about overflows, you will also likely need to enable the “POSIX error mapper”. This is due to a difference between Haiku and the current POSIX spec, we use negative values for errno error codes, which is not allowed by POSIX. So, there is a compatibility library to fix that.

2 Likes

Actually, in cases like these, we do not need to enable the error mapper, I think. Note carefully what the message is saying:

warning: integer overflow in expression ‘-2147483648’ of type ‘int’ results in ‘-2147483648’

The two numbers are exactly the same; the error number is not being transformed at all. The program wants a negative error number internally, and it gets that anyway. This is a bit dangerous, and the sources should probably be patched anyway to not try to “double-negative” such errors, but it should work anyway, I think.

rtlsdr_rtl-test

Recipe build: success :v:
Headache level: ibuprofen plz.

What I need now is a way to pipe raw audio samples to the soundcard, basically the equivalent of Linux sox’s play command for Haiku – I’ve installed sox from the Depot, but Haiku’s play command (which serves another purpose) seems to take precedence… where do I look for sox one?

sndfile-play doesn’t work either: “Playing sound not supported on this platform. Please feel free to submit a patch”… while I’m listening some MP3s, heh.

This is the example commonly given for Linux:

rtl_fm -M wbfm -f 88.9M | play -r 32k -t raw -e s -b 16 -c 1 -V1 -

I’m sooo close to actually listen to FM radio! (rock/prog preferred)

3 Likes

For the “play” command, it looks like there is a conflict so the “sox” one will not be visible. I think we could remove the “play” command from Haiku since it seems quite useless (for playing audio CDs using direct request to the CD drive, which will probably not work at all on modern hardware).

1 Like

Cool, I’ll open a ticket for that.

Re: negative error codes. From libusb docs: “libusb functions typically return 0 on success or a negative error code on failure. These negative error codes relate to LIBUSB_ERROR constants which are listed on the miscellaneous documentation page”.

Actual values are below. They seem to be within Haiku spec, right?

libusb_error { 
  LIBUSB_SUCCESS = 0 , LIBUSB_ERROR_IO = -1 , LIBUSB_ERROR_INVALID_PARAM = -2 , LIBUSB_ERROR_ACCESS = -3 , 
  LIBUSB_ERROR_NO_DEVICE = -4 , LIBUSB_ERROR_NOT_FOUND = -5 , LIBUSB_ERROR_BUSY = -6 , LIBUSB_ERROR_TIMEOUT = -7 , 
  LIBUSB_ERROR_OVERFLOW = -8 , LIBUSB_ERROR_PIPE = -9 , LIBUSB_ERROR_INTERRUPTED = -10 , LIBUSB_ERROR_NO_MEM = -11 , 
  LIBUSB_ERROR_NOT_SUPPORTED = -12 , LIBUSB_ERROR_OTHER = -99 
}

How they end being in the -2147483648 ballpark, is something I’m afraid cannot debug with my limited knowledge… In the meanwhile I’ll clean the recipe a bit, and see what degree of functionality the other rtl-sdr commands have.