Open FCD.

plugins/samplesource/fcd/CMakeLists.txt

@@ -13,7 +13,6 @@ set(rtlsdr_HEADERS
 	fcdinput.h
 	fcdplugin.h
 	fcdthread.h
-	fcdsource.h
 )
 
 set(fcd_FORMS
@@ -43,6 +42,7 @@ add_library(inputfcd SHARED
 
 target_link_libraries(inputfcd
 	${QT_LIBRARIES}
+	asound
 	sdrbase
 )
 

plugins/samplesource/fcd/fcdsource.cpp

@@ -0,0 +1,48 @@
+/* (C)2015 John Greb
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public Licence version 3.
+ */
+
+#include "fcdthread.h"
+
+bool FCDThread::OpenSource(const char* cardname)
+{
+	//fcd_rate = FCDPP_RATE;
+	//fcd_channels =2;
+	//fcd_format = SND_PCM_SFMT_U16_LE;
+	fcd_stream = SND_PCM_STREAM_PLAYBACK;
+
+	if (fcd_handle)
+		return false;
+	if ( snd_pcm_open( &fcd_handle, cardname, fcd_stream, 1 ) < 0 )
+		return false;
+
+	return true;
+}
+
+void FCDThread::CloseSource()
+{
+	if (fcd_handle)
+		snd_pcm_close( fcd_handle );
+	fcd_handle = NULL;
+}
+
+void FCDThread::set_center_freq(double freq)
+{
+	//TODO
+}
+
+void FCDThread::work(int n_items)
+{
+	int l;
+	SampleVector::iterator it;
+	void *out;
+
+	it = m_convertBuffer.begin();
+	out = (void *)&it[0];
+	l = snd_pcm_readi(fcd_handle, out, (snd_pcm_uframes_t)n_items);
+	if (l > 0)
+		m_sampleFifo->write(it, it + l);
+}
+
+

plugins/samplesource/fcd/fcdthread.cpp

@@ -42,8 +42,7 @@ void FCDThread::stopWork()
 void FCDThread::run()
 {
 	m_running = true;
-	OpenSource("/dev/dsp");
-	if (fd < 0)
+	if ( !OpenSource("hw:CARD=V20") )
                 return;
 
 	while(m_running) {

plugins/samplesource/fcd/fcdthread.h

@@ -23,8 +23,9 @@
 #include <QWaitCondition>
 #include "dsp/samplefifo.h"
 #include "dsp/inthalfbandfilter.h"
+#include <alsa/asoundlib.h>
 
-#define SAMPLERATE 192000
+#define FCDPP_RATE 192000
 #define BLOCKSIZE 8192
 
 class FCDThread : public QThread {
@@ -35,17 +36,14 @@ public:
 	~FCDThread();
 
 	void stopWork();
-	void OpenSource(const char *filename);
+	bool OpenSource(const char *filename);
 	void CloseSource();
 	void set_center_freq(double freq);
-	int  work(int n_items);
+	void work(int n_items);
 private:
-	int fd;
-	struct fcd_buffer *buffers;
-	unsigned int n_buffers;
-	void *recebuf_ptr;
-	unsigned int recebuf_len;
-	unsigned int recebuf_mmap_index;
+	snd_pcm_format_t fcd_format;
+	snd_pcm_t* fcd_handle = NULL;
+	snd_pcm_stream_t fcd_stream;
 
 	QMutex m_startWaitMutex;
 	QWaitCondition m_startWaiter;