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/* -*- c++ -*- */
/*
* Copyright 2014 Analog Devices Inc.
* Author: Paul Cercueil <paul.cercueil@analog.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include "device_sink_impl.h"
#include "device_source_impl.h"
#include <cstdio>
namespace gr {
namespace iio {
device_sink::sptr
device_sink::make(const std::string &uri, const std::string &device,
const std::vector<std::string> &channels,
const std::string &device_phy,
const std::vector<std::string> ¶ms,
unsigned int buffer_size, unsigned int interpolation,
bool cyclic)
{
return gnuradio::get_initial_sptr
(new device_sink_impl(device_source_impl::get_context(uri), true,
device, channels, device_phy, params,
buffer_size, interpolation, cyclic));
}
device_sink::sptr
device_sink::make_from(struct iio_context *ctx, const std::string &device,
const std::vector<std::string> &channels,
const std::string &device_phy,
const std::vector<std::string> ¶ms,
unsigned int buffer_size, unsigned int interpolation,
bool cyclic)
{
return gnuradio::get_initial_sptr
(new device_sink_impl(ctx, false, device, channels,
device_phy, params,
buffer_size, interpolation, cyclic));
}
void device_sink_impl::set_params(const std::vector<std::string> ¶ms)
{
device_source_impl::set_params(this->phy, params);
}
/*
* The private constructor
*/
device_sink_impl::device_sink_impl(struct iio_context *ctx,
bool destroy_ctx, const std::string &device,
const std::vector<std::string> &channels,
const std::string &device_phy,
const std::vector<std::string> ¶ms,
unsigned int buffer_size, unsigned int interpolation,
bool cyclic)
: gr::sync_block("device_sink",
gr::io_signature::make(1, -1, sizeof(short)),
gr::io_signature::make(0, 0, 0)),
ctx(ctx),
interpolation(interpolation),
buffer_size(buffer_size),
destroy_ctx(destroy_ctx)
{
unsigned int nb_channels, i;
unsigned short vid, pid;
/* Set minimum input size */
set_output_multiple(buffer_size / (interpolation + 1));
if (!ctx)
throw std::runtime_error("Unable to create context");
dev = iio_context_find_device(ctx, device.c_str());
phy = iio_context_find_device(ctx, device_phy.c_str());
if (!dev || !phy) {
if (destroy_ctx)
iio_context_destroy(ctx);
throw std::runtime_error("Device not found");
}
/* First disable all channels */
nb_channels = iio_device_get_channels_count(dev);
for (i = 0; i < nb_channels; i++)
iio_channel_disable(iio_device_get_channel(dev, i));
if (channels.empty()) {
for (i = 0; i < nb_channels; i++) {
struct iio_channel *chn =
iio_device_get_channel(dev, i);
iio_channel_enable(chn);
channel_list.push_back(chn);
}
} else {
for (std::vector<std::string>::const_iterator it =
channels.begin();
it != channels.end(); ++it) {
struct iio_channel *chn =
iio_device_find_channel(dev,
it->c_str(), true);
if (!chn) {
if (destroy_ctx)
iio_context_destroy(ctx);
throw std::runtime_error(
"Channel not found");
}
iio_channel_enable(chn);
if (!iio_channel_is_enabled(chn))
throw std::runtime_error(
"Channel not enabled");
channel_list.push_back(chn);
}
}
set_params(params);
buf = iio_device_create_buffer(dev, buffer_size, cyclic);
if (!buf)
throw std::runtime_error("Unable to create buffer: " + boost::to_string(-errno));
}
/*
* Our virtual destructor.
*/
device_sink_impl::~device_sink_impl()
{
iio_buffer_destroy(buf);
device_source_impl::remove_ctx_history(ctx,destroy_ctx);
}
void
device_sink_impl::channel_write(const struct iio_channel *chn,
const void *src, size_t len)
{
uintptr_t dst_ptr, src_ptr = (uintptr_t) src, end = src_ptr + len;
unsigned int length = iio_channel_get_data_format(chn)->length / 8;
uintptr_t buf_end = (uintptr_t) iio_buffer_end(buf);
ptrdiff_t buf_step = iio_buffer_step(buf) * (interpolation + 1);
for (dst_ptr = (uintptr_t) iio_buffer_first(buf, chn);
dst_ptr < buf_end && src_ptr + length <= end;
dst_ptr += buf_step, src_ptr += length)
iio_channel_convert_inverse(chn,
(void *) dst_ptr, (const void *) src_ptr);
}
int
device_sink_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int ret;
if (interpolation >= 1) {
ptrdiff_t len = (intptr_t) iio_buffer_end(buf)
- (intptr_t) iio_buffer_start(buf);
memset(iio_buffer_start(buf), 0, len);
}
for (unsigned int i = 0; i < input_items.size(); i++)
channel_write(channel_list[i], input_items[i],
noutput_items * sizeof(short));
ret = iio_buffer_push(buf);
if (ret < 0) {
char buf[256];
iio_strerror(-ret, buf, sizeof(buf));
std::string error(buf);
std::cerr << "Unable to push buffer: " << error << std::endl;
return -1; /* EOF */
}
consume_each(buffer_size / (interpolation + 1));
return 0;
}
void
device_sink_impl::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
for (unsigned int i = 0; i < ninput_items_required.size(); i++)
ninput_items_required[i] = noutput_items;
}
} /* namespace iio */
} /* namespace gr */
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