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/* -*- c++ -*- */
/*
* Copyright 2014 Analog Devices Inc.
* Author: Paul Cercueil <paul.cercueil@analog.com>
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "device_sink_impl.h"
#include "device_source_impl.h"
#include <gnuradio/io_signature.h>
#include <boost/format.hpp>
#include <string>
#include <vector>
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>& params,
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(iio_context* ctx,
const std::string& device,
const std::vector<std::string>& channels,
const std::string& device_phy,
const std::vector<std::string>& params,
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>& params)
{
device_source_impl::set_params(this->phy, params);
}
/*
* The private constructor
*/
device_sink_impl::device_sink_impl(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>& params,
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)),
d_tags(0),
ctx(ctx),
interpolation(interpolation),
buffer_size(buffer_size),
destroy_ctx(destroy_ctx),
d_len_tag_key(pmt::PMT_NIL)
{
unsigned int nb_channels, i;
/* 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++) {
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) {
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: " + std::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 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);
}
void device_sink_impl::set_len_tag_key(const std::string& len_tag_key)
{
if (!len_tag_key.size()) {
d_len_tag_key = pmt::PMT_NIL;
} else {
d_len_tag_key = pmt::string_to_symbol(len_tag_key);
}
}
int device_sink_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
int ret;
if (d_len_tag_key != pmt::PMT_NIL) {
for (size_t i = 0; i < input_items.size(); i++) {
auto items_read = nitems_read(i);
get_tags_in_range(d_tags, i, items_read, items_read + 1, d_len_tag_key);
if (d_tags.size() < 1) {
throw std::runtime_error("device_sink: Input stream not tagged! Either "
"disable tagged input or tag your stream!");
}
auto required_size = buffer_size / (interpolation + 1);
for (auto& tag : d_tags) {
auto packet_len = pmt::to_long(tag.value);
if (packet_len != required_size) {
throw std::runtime_error("Invalid packet size, expected " +
std::to_string(required_size) + " and got " +
std::to_string(packet_len) + "!");
}
}
}
// Everything is ok, we can proceed
}
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);
GR_LOG_WARN(d_logger, boost::format("Unable to push buffer: %d") % error);
return WORK_DONE; /* 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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