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/* -*- c++ -*- */
/*
* Copyright 2004,2009,2010,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/block.h>
#include <gnuradio/buffer.h>
#include <gnuradio/buffer_reader.h>
#include <gnuradio/buffer_reader_sm.h>
#include <gnuradio/integer_math.h>
#include <gnuradio/math.h>
#include <assert.h>
#include <algorithm>
#include <iostream>
#include <stdexcept>
namespace gr {
static long s_buffer_reader_count = 0;
buffer_reader_sptr
buffer_add_reader(buffer_sptr buf, int nzero_preload, block_sptr link, int delay)
{
if (nzero_preload < 0)
throw std::invalid_argument("buffer_add_reader: nzero_preload must be >= 0");
buffer_reader_sptr r;
if (buf->get_mapping_type() == BufferMappingType::DoubleMapped) {
r.reset(new buffer_reader(
buf, buf->index_sub(buf->d_write_index, nzero_preload), link));
r->declare_sample_delay(delay);
} else if (buf->get_mapping_type() == BufferMappingType::SingleMapped) {
r.reset(new buffer_reader_sm(
buf, buf->index_sub(buf->d_write_index, nzero_preload), link));
r->declare_sample_delay(delay);
// Update reader block history
buf->update_reader_block_history(link->history(), delay);
r->d_read_index = buf->d_write_index - nzero_preload;
}
buf->d_readers.push_back(r.get());
#ifdef BUFFER_DEBUG
// BUFFER DEBUG
std::cerr << " [" << buf.get() << ";" << r.get()
<< "] buffer_add_reader() nzero_preload " << nzero_preload
<< " -- delay: " << delay << " -- history: " << link->history()
<< " -- RD_idx: " << r->d_read_index << std::endl;
#endif
return r;
}
buffer_reader::buffer_reader(buffer_sptr buffer, unsigned int read_index, block_sptr link)
: d_buffer(buffer),
d_read_index(read_index),
d_abs_read_offset(0),
d_link(link),
d_attr_delay(0)
{
#ifdef BUFFER_DEBUG
gr::configure_default_loggers(d_logger, d_debug_logger, "buffer_reader");
#endif
s_buffer_reader_count++;
}
buffer_reader::~buffer_reader()
{
d_buffer->drop_reader(this);
s_buffer_reader_count--;
}
void buffer_reader::declare_sample_delay(unsigned delay)
{
d_attr_delay = delay;
d_buffer->d_max_reader_delay = std::max(d_attr_delay, d_buffer->d_max_reader_delay);
}
unsigned buffer_reader::sample_delay() const { return d_attr_delay; }
int buffer_reader::items_available() // const
{
int available = d_buffer->index_sub(d_buffer->d_write_index, d_read_index);
#ifdef BUFFER_DEBUG
// BUFFER DEBUG
std::ostringstream msg;
msg << "[" << d_buffer << ";" << this << "] "
<< "items_available() WR_idx: " << d_buffer->d_write_index
<< " -- WR items: " << d_buffer->nitems_written()
<< " -- RD_idx: " << d_read_index << " -- RD items: " << nitems_read() << " (-"
<< d_attr_delay << ") -- available: " << available;
GR_LOG_DEBUG(d_logger, msg.str());
#endif
return available;
}
const void* buffer_reader::read_pointer()
{
return &d_buffer->d_base[d_read_index * d_buffer->d_sizeof_item];
}
void buffer_reader::update_read_pointer(int nitems)
{
gr::thread::scoped_lock guard(*mutex());
#ifdef BUFFER_DEBUG
// BUFFER DEBUG
unsigned orig_rd_idx = d_read_index;
#endif
d_read_index = d_buffer->index_add(d_read_index, nitems);
d_abs_read_offset += nitems;
#ifdef BUFFER_DEBUG
// BUFFER DEBUG
std::ostringstream msg;
msg << "[" << d_buffer << ";" << this
<< "] update_read_pointer -- orig d_read_index: " << orig_rd_idx
<< " -- nitems: " << nitems << " -- d_read_index: " << d_read_index;
GR_LOG_DEBUG(d_buffer->d_logger, msg.str());
#endif
}
void buffer_reader::get_tags_in_range(std::vector<tag_t>& v,
uint64_t abs_start,
uint64_t abs_end,
long id)
{
gr::thread::scoped_lock guard(*mutex());
uint64_t lower_bound = abs_start - d_attr_delay;
// check for underflow and if so saturate at 0
if (lower_bound > abs_start)
lower_bound = 0;
uint64_t upper_bound = abs_end - d_attr_delay;
// check for underflow and if so saturate at 0
if (upper_bound > abs_end)
upper_bound = 0;
v.clear();
std::multimap<uint64_t, tag_t>::iterator itr =
d_buffer->get_tags_lower_bound(lower_bound);
std::multimap<uint64_t, tag_t>::iterator itr_end =
d_buffer->get_tags_upper_bound(upper_bound);
uint64_t item_time;
while (itr != itr_end) {
item_time = (*itr).second.offset + d_attr_delay;
if ((item_time >= abs_start) && (item_time < abs_end)) {
std::vector<long>::iterator id_itr;
id_itr = std::find(
itr->second.marked_deleted.begin(), itr->second.marked_deleted.end(), id);
// If id is not in the vector of marked blocks
if (id_itr == itr->second.marked_deleted.end()) {
tag_t t = (*itr).second;
t.offset += d_attr_delay;
v.push_back(t);
v.back().marked_deleted.clear();
}
}
itr++;
}
}
long buffer_reader_ncurrently_allocated() { return s_buffer_reader_count; }
} /* namespace gr */
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