Hi Alex,
thank you for your hint. I added the device_name parameter .
Now if the device name is not empty, I try to open the appropriate alsa
device. If the device string is empty or opening device failed ( perhaps
the device string was misspelled ) I try to autodetect the dongle.
I personally prefer autodetection, as the order of my soundcards may
change from boot to boot. So I attach a small patch for gr-fcd to enable
autodetection, too.
Volker
Am 01.04.2013 00:29, schrieb Alexandru Csete:
On Thu, Mar 28, 2013 at 11:41 AM, Volker Schroer <dl1...@gmx.de> wrote:
Just for your information:
In imitation of the gr-fcd source I set up a gnuradio source for the funcube
pro+ ( linux only) . To avoid the crashes depending on libusb I used the
hidraw driver.
The source and an example can be found on
https://github.com/dl1ksv/gr-fcdproplus.git
Comments are welcome.
Enjoy it
Hi Volker,
Nice work.
I would recommend letting the user specify the device string and only
use auto-detection if string is empty.
Alex
>From 15f35d9e701e1eaea113d22a0835384751a8bc4d Mon Sep 17 00:00:00 2001
From: dl1ksv <dl1...@gmx.de>
Date: Tue, 2 Apr 2013 11:27:15 +0200
Subject: [PATCH] added autodetect feature to gr-fcd
---
gr-fcd/lib/fcd_source_c_impl.cc | 46 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/gr-fcd/lib/fcd_source_c_impl.cc b/gr-fcd/lib/fcd_source_c_impl.cc
index 81ccee0..7367334 100644
--- a/gr-fcd/lib/fcd_source_c_impl.cc
+++ b/gr-fcd/lib/fcd_source_c_impl.cc
@@ -29,6 +29,10 @@
#include <gr_float_to_complex.h>
#include <gruel/attributes.h>
+#include <fstream>
+#include <exception>
+
+
//#include <iostream>
//using namespace std;
@@ -54,9 +58,49 @@ fcd_source_c_impl::fcd_source_c_impl(const std::string device_name)
d_freq_req(0)
{
gr_float_to_complex_sptr f2c;
+ bool success;
/* Audio source; sample rate fixed at 96kHz */
- fcd = audio_make_source(96000, device_name, true);
+ if(!device_name.empty()) {
+ try {
+ /* Audio source; sample rate fixed at 192kHz */
+ fcd = audio_make_source(96000, device_name, true);
+ success=true;
+ }
+ catch (std::exception ) {
+ success=false;
+ }
+ }
+ if (! success) {
+ std::string auto_device_name;
+ auto_device_name.clear();
+ std::string line;
+ std::ifstream cards( "/proc/asound/cards" );
+ if ( cards.is_open() ) {
+ while ( cards.good() ) {
+ getline (cards, line);
+
+ if ( line.find( "USB-Audio - FUNcube Dongle V1.0" ) != std::string::npos ) {
+ int id;
+ std::istringstream( line ) >> id;
+
+ std::ostringstream hw_id;
+ hw_id << "plughw:" << id<<",0"; // build alsa identifier
+ auto_device_name= hw_id.str();
+ break;
+ }
+ }
+ cards.close();
+ if(auto_device_name.empty()) {
+ throw std::runtime_error("No FunCube Dongle V1.0 found.");
+ }
+ }
+ else {
+ throw std::runtime_error("Alsa not found.");
+ }
+ /* Audio source; sample rate fixed at 96kHz */
+ fcd = audio_make_source(96000,auto_device_name, true);
+ }
/* block to convert stereo audio to a complex stream */
f2c = gr_make_float_to_complex(1);
--
1.8.1.5
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