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Borrow layer from GnuRadio Plugin.

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This commit is contained in:
John Greb 2014-11-05 12:34:33 +00:00
parent cce7115288
commit 62656fc45b
8 changed files with 398 additions and 6 deletions
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4
CMakeLists.txt
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@ -1,4 +1,8 @@
cmake_minimum_required(VERSION 2.8.9)
option(KERNEL "Use Linux Kernel Video4Linux Source." OFF)
option(IS96KHZ "Upper SideBand decoder needs 96kHz" OFF)
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
project(sdrangelove)

3
Readme.md
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@ -4,3 +4,6 @@ For Ubuntu:
mkdir out && cd out && cmake ../ && make
"librtlsdr-dev" is in the "universe" repo. (utopic 14.10 amd64.)
Use "cmake ../ -DKERNEL=ON" to build the Linux kernel driver. May support Airspy and Hackrf.

5
plugins/channel/CMakeLists.txt
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@ -3,5 +3,8 @@ project(demod)
add_subdirectory(nfm)
add_subdirectory(tcpsrc)
add_subdirectory(ssb)
add_subdirectory(usb)
if (IS96KHZ)
add_subdirectory(usb)
endif()
#add_subdirectory(tetra)

7
plugins/samplesource/CMakeLists.txt
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@ -2,7 +2,6 @@ project(samplesource)
find_package(LibUSB)
find_package(LibOsmoSDR)
find_package(LibRTLSDR)
add_subdirectory(gnuradio)
@ -10,6 +9,12 @@ if(LIBUSB_FOUND AND LIBOSMOSDR_FOUND)
add_subdirectory(osmosdr)
endif(LIBUSB_FOUND AND LIBOSMOSDR_FOUND)
if(KERNEL AND UNIX)
add_subdirectory(v4l)
else()
find_package(LibRTLSDR)
endif()
if(LIBUSB_FOUND AND LIBRTLSDR_FOUND)
add_subdirectory(rtlsdr)
endif(LIBUSB_FOUND AND LIBRTLSDR_FOUND)

8
plugins/samplesource/v4l/CMakeLists.txt
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@ -5,6 +5,7 @@ set(v4l_SOURCES
v4linput.cpp
v4lplugin.cpp
v4lthread.cpp
v4lsource.cpp
)
set(rtlsdr_HEADERS
@ -12,6 +13,7 @@ set(rtlsdr_HEADERS
v4linput.h
v4lplugin.h
v4lthread.h
v4lsource.h
)
set(v4l_FORMS
@ -31,7 +33,7 @@ add_definitions(${QT_DEFINITIONS})
add_definitions(-DQT_PLUGIN)
add_definitions(-DQT_SHARED)
#qt4_wrap_cpp(rtlsdr_HEADERS_MOC ${v4l_HEADERS})
#qt4_wrap_cpp(v4l_HEADERS_MOC ${v4l_HEADERS})
qt5_wrap_ui(v4l_FORMS_HEADERS ${v4l_FORMS})
add_library(inputv4l SHARED
@ -42,8 +44,8 @@ add_library(inputv4l SHARED
target_link_libraries(inputv4l
${QT_LIBRARIES}
${LIBRTLSDR_LIBRARIES}
${LIBUSB_LIBRARIES}
# ${LIBRTLSDR_LIBRARIES}
# ${LIBUSB_LIBRARIES}
sdrbase
)

2
plugins/samplesource/v4l/v4lplugin.cpp
View File

@ -47,7 +47,7 @@ PluginInterface::SampleSourceDevices V4LPlugin::enumSampleSources()
if(rtlsdr_get_device_usb_strings((uint32_t)i, vendor, product, serial) != 0)
continue;
QString displayedName(QString("RTL-SDR #%1 (%2 #%3)").arg(i + 1).arg(product).arg(serial));
QString displayedName(QString("SDR #%1 (%2 #%3)").arg(i + 1).arg(product).arg(serial));
SimpleSerializer s(1);
s.writeS32(1, i);
result.append(SampleSourceDevice(displayedName, "org.osmocom.sdr.samplesource.v4l", s.final()));

301
plugins/samplesource/v4l/v4lsource.cpp Normal file
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@ -0,0 +1,301 @@
/*
* Copyright 2013 Antti Palosaari <crope@iki.fi>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "v4lsource.h"
/* Control classes */
#define V4L2_CTRL_CLASS_USER 0x00980000 /* Old-style 'user' controls */
/* User-class control IDs */
#define V4L2_CID_BASE (V4L2_CTRL_CLASS_USER | 0x900)
#define V4L2_CID_USER_BASE V4L2_CID_BASE
#define CID_SAMPLING_MODE ((V4L2_CID_USER_BASE | 0xf000) + 0)
#define CID_SAMPLING_RATE ((V4L2_CID_USER_BASE | 0xf000) + 1)
#define CID_SAMPLING_RESOLUTION ((V4L2_CID_USER_BASE | 0xf000) + 2)
#define CID_TUNER_RF ((V4L2_CID_USER_BASE | 0xf000) + 10)
#define CID_TUNER_BW ((V4L2_CID_USER_BASE | 0xf000) + 11)
#define CID_TUNER_IF ((V4L2_CID_USER_BASE | 0xf000) + 12)
#define CID_TUNER_GAIN ((V4L2_CID_USER_BASE | 0xf000) + 13)
#define V4L2_PIX_FMT_SDR_U8 v4l2_fourcc('D', 'U', '0', '8') /* unsigned 8-bit */
#define V4L2_PIX_FMT_SDR_U16LE v4l2_fourcc('D', 'U', '1', '6') /* unsigned 16-bit LE */
#define CLEAR(x) memset(&(x), 0, sizeof(x))
static void xioctl(int fh, unsigned long int request, void *arg)
{
int ret;
do {
ret = v4l2_ioctl(fh, request, arg);
} while (ret == -1 && ((errno == EINTR) || (errno == EAGAIN)));
if (ret == -1) {
fprintf(stderr, "error %d\n", errno);
}
}
namespace kernel{
v4l::v4l(const char *filename)
{
struct v4l2_format fmt;
struct v4l2_buffer buf;
struct v4l2_requestbuffers req;
enum v4l2_buf_type type;
unsigned int i;
recebuf_len = 0;
// libv4l2 does not know SDR yet
// fd = v4l2_open(filename, O_RDWR | O_NONBLOCK, 0);
fd = open(filename, O_RDWR | O_NONBLOCK, 0);
if (fd < 0) {
perror("Cannot open device");
}
pixelformat = V4L2_PIX_FMT_SDR_U8;
//pixelformat = V4L2_PIX_FMT_SDR_U16LE;
CLEAR(fmt);
fmt.type = V4L2_BUF_TYPE_SDR_CAPTURE;
fmt.fmt.sdr.pixelformat = pixelformat;
xioctl(fd, VIDIOC_S_FMT, &fmt);
if (fmt.fmt.sdr.pixelformat != pixelformat) {
printf("Libv4l didn't accept FLOAT format. Cannot proceed. Pixelformat %4.4s\n",
(char *)&fmt.fmt.sdr.pixelformat);
}
printf("Selected stream format: %4.4s\n", (char *)&fmt.fmt.sdr.pixelformat);
CLEAR(req);
req.count = 8;
req.type = V4L2_BUF_TYPE_SDR_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
xioctl(fd, VIDIOC_REQBUFS, &req);
buffers = (struct buffer*) calloc(req.count, sizeof(*buffers));
for (n_buffers = 0; n_buffers < req.count; n_buffers++) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = n_buffers;
xioctl(fd, VIDIOC_QUERYBUF, &buf);
buffers[n_buffers].length = buf.length;
buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
PROT_READ | PROT_WRITE, MAP_SHARED,
fd, buf.m.offset);
if (buffers[n_buffers].start == MAP_FAILED) {
perror("mmap");
}
}
for (i = 0; i < n_buffers; i++) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
xioctl(fd, VIDIOC_QBUF, &buf);
}
// start streaming
type = V4L2_BUF_TYPE_SDR_CAPTURE;
xioctl(fd, VIDIOC_STREAMON, &type);
}
/*
* Our virtual destructor.
*/
v4l::~v4l()
{
unsigned int i;
enum v4l2_buf_type type;
// stop streaming
type = V4L2_BUF_TYPE_SDR_CAPTURE;
xioctl(fd, VIDIOC_STREAMOFF, &type);
for (i = 0; i < n_buffers; i++)
v4l2_munmap(buffers[i].start, buffers[i].length);
v4l2_close(fd);
}
void
v4l::set_samp_rate(double samp_rate)
{
struct v4l2_frequency frequency;
memset (&frequency, 0, sizeof(frequency));
frequency.tuner = 0;
frequency.type = V4L2_TUNER_ADC;
frequency.frequency = samp_rate / 1;
if (v4l2_ioctl(fd, VIDIOC_S_FREQUENCY, &frequency) == -1)
perror("VIDIOC_S_FREQUENCY");
return;
}
void
v4l::set_center_freq(double freq)
{
struct v4l2_frequency frequency;
memset (&frequency, 0, sizeof(frequency));
frequency.tuner = 1;
frequency.type = V4L2_TUNER_RF;
frequency.frequency = freq;
if (v4l2_ioctl(fd, VIDIOC_S_FREQUENCY, &frequency) == -1)
perror("VIDIOC_S_FREQUENCY");
return;
}
void
v4l::set_bandwidth(double bandwidth)
{
struct v4l2_ext_controls ext_ctrls;
struct v4l2_ext_control ext_ctrl;
memset (&ext_ctrl, 0, sizeof(ext_ctrl));
ext_ctrl.id = CID_TUNER_BW;
ext_ctrl.value = bandwidth;
memset (&ext_ctrls, 0, sizeof(ext_ctrls));
ext_ctrls.ctrl_class = V4L2_CTRL_CLASS_USER;
ext_ctrls.count = 1;
ext_ctrls.controls = &ext_ctrl;
if (v4l2_ioctl(fd, VIDIOC_S_EXT_CTRLS, &ext_ctrls) == -1)
perror("VIDIOC_S_EXT_CTRLS");
return;
}
void
v4l::set_tuner_gain(double gain)
{
struct v4l2_ext_controls ext_ctrls;
struct v4l2_ext_control ext_ctrl;
memset (&ext_ctrl, 0, sizeof(ext_ctrl));
ext_ctrl.id = CID_TUNER_GAIN;
ext_ctrl.value = gain;
memset (&ext_ctrls, 0, sizeof(ext_ctrls));
ext_ctrls.ctrl_class = V4L2_CTRL_CLASS_USER;
ext_ctrls.count = 1;
ext_ctrls.controls = &ext_ctrl;
if (v4l2_ioctl(fd, VIDIOC_S_EXT_CTRLS, &ext_ctrls) == -1)
perror("VIDIOC_S_EXT_CTRLS");
return;
}
int
v4l::work(int noutput_items,
void* input_items,
void* output_items)
{
//complex *out = (complex *) output_items;
int ret;
struct timeval tv;
struct v4l2_buffer buf;
fd_set fds;
unsigned int i, items = 0;
float *fptr = (float *) output_items;
process_buf:
/* process received mmap buffer */
uint8_t *u8src = (uint8_t *) recebuf_ptr;
uint16_t *u16src = (uint16_t *) recebuf_ptr;
while (recebuf_len) {
if (pixelformat == V4L2_PIX_FMT_SDR_U8) {
*fptr++ = (*u8src++ - 127.5f) / 127.5f;
*fptr++ = (*u8src++ - 127.5f) / 127.5f;
recebuf_len -= 2;
items++;
recebuf_ptr = u8src;
} else if (pixelformat == V4L2_PIX_FMT_SDR_U16LE) {
*fptr++ = (*u16src++ - 32767.5f) / 32767.5f;
*fptr++ = (*u16src++ - 32767.5f) / 32767.5f;
recebuf_len -= 4;
items++;
recebuf_ptr = u16src;
} else {
recebuf_len = 0;
}
if (items == noutput_items)
break;
}
/* enqueue mmap buf after it is processed */
if (recebuf_len == 0 && items != 0) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = recebuf_mmap_index;
xioctl(fd, VIDIOC_QBUF, &buf);
}
/* signal DSP we have some samples to offer */
if (items)
return items;
/* Read data from device */
do {
FD_ZERO(&fds);
FD_SET(fd, &fds);
// Timeout
tv.tv_sec = 2;
tv.tv_usec = 0;
ret = select(fd + 1, &fds, NULL, NULL, &tv);
} while ((ret == -1 && (errno = EINTR)));
if (ret == -1) {
perror("select");
return errno;
}
/* dequeue mmap buf (receive data) */
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
xioctl(fd, VIDIOC_DQBUF, &buf);
/* store buffer in order to handle it during next call */
recebuf_ptr = buffers[buf.index].start;
recebuf_len = buf.bytesused;
recebuf_mmap_index = buf.index;
/* FIXME: */
goto process_buf;
// Tell runtime system how many output items we produced.
return 0;
}
} /* namespace kernel */

74
plugins/samplesource/v4l/v4lsource.h Normal file
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@ -0,0 +1,74 @@
/*
* Copyright 2013 Antti Palosaari <crope@iki.fi>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_KERNEL_LIBV4L2_X_IMPL_H
#define INCLUDED_KERNEL_LIBV4L2_X_IMPL_H
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <uapi/linux/videodev2.h>
#include "/usr/local/include/libv4l2.h"
#include "fcntl.h"
#include <sys/mman.h>
namespace kernel {
// v4l2_mmap
struct buffer {
void *start;
size_t length;
};
class v4l //: public v4l
{
private:
// v4l2 device file handle
int fd;
// stream / sample format
uint32_t pixelformat;
struct buffer *buffers;
unsigned int n_buffers;
// for processing mmap buffer
void *recebuf_ptr;
unsigned int recebuf_len;
unsigned int recebuf_mmap_index;
public:
v4l(const char *filename);
~v4l();
void set_samp_rate(double samp_rate);
void set_center_freq(double freq);
void set_bandwidth(double bandwidth);
void set_tuner_gain(double gain);
// Where all the action really happens
int work(int noutput_items,
void* input_items,
void* output_items);
};
} // namespace kernel
#endif /* INCLUDED_KERNEL_LIBV4L2_X_IMPL_H */