From 5ee85c4ac41337e383eb1a735bc05f1e5d46a98f Mon Sep 17 00:00:00 2001 From: "Matthias P. Braendli" Date: Mon, 19 Aug 2019 17:18:51 +0200 Subject: Use EDI output from odr-mmbtools-common --- src/dabOutput/edi/Interleaver.cpp | 122 -------------------------------------- 1 file changed, 122 deletions(-) delete mode 100644 src/dabOutput/edi/Interleaver.cpp (limited to 'src/dabOutput/edi/Interleaver.cpp') diff --git a/src/dabOutput/edi/Interleaver.cpp b/src/dabOutput/edi/Interleaver.cpp deleted file mode 100644 index f26a50e..0000000 --- a/src/dabOutput/edi/Interleaver.cpp +++ /dev/null @@ -1,122 +0,0 @@ -/* - Copyright (C) 2017 - Matthias P. Braendli, matthias.braendli@mpb.li - - http://www.opendigitalradio.org - - EDI output, - Interleaving of PFT fragments to increase robustness against - burst packet loss. - - This is possible because EDI has to assume that fragments may reach - the receiver out of order. - - */ -/* - This file is part of ODR-DabMux. - - ODR-DabMux 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 of the - License, or (at your option) any later version. - - ODR-DabMux 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 ODR-DabMux. If not, see . - */ - -#include "Interleaver.h" -#include - -namespace edi { - -void Interleaver::SetLatency(size_t latency_frames) -{ - m_latency = latency_frames; -} - -Interleaver::fragment_vec Interleaver::Interleave(fragment_vec &fragments) -{ - m_fragment_count = fragments.size(); - - // Create vectors containing Fcount*latency fragments in total - // and store them into the deque - if (m_buffer.empty()) { - m_buffer.emplace_back(); - } - - auto& last_buffer = m_buffer.back(); - - for (auto& fragment : fragments) { - const bool last_buffer_is_complete = - (last_buffer.size() >= m_fragment_count * m_latency); - - if (last_buffer_is_complete) { - m_buffer.emplace_back(); - last_buffer = m_buffer.back(); - } - - last_buffer.push_back(std::move(fragment)); - } - - fragments.clear(); - - while ( not m_buffer.empty() and - (m_buffer.front().size() >= m_fragment_count * m_latency)) { - - auto& first_buffer = m_buffer.front(); - - assert(first_buffer.size() == m_fragment_count * m_latency); - - /* Assume we have 5 fragments per AF frame, and latency of 3. - * This will give the following strides: - * 0 1 2 - * +-------+-------+---+ - * | 0 1 | 2 3 | 4 | - * | | +---+ | - * | 5 6 | 7 | 8 9 | - * | +---+ | | - * |10 |11 12 |13 14 | - * +---+-------+-------+ - * - * ix will be 0, 5, 10, 1, 6 in the first loop - */ - - for (size_t i = 0; i < m_fragment_count; i++) { - const size_t ix = m_interleave_offset + m_fragment_count * m_stride; - m_interleaved_fragments.push_back(first_buffer.at(ix)); - - m_stride += 1; - if (m_stride >= m_latency) { - m_interleave_offset++; - m_stride = 0; - } - } - - if (m_interleave_offset >= m_fragment_count) { - m_interleave_offset = 0; - m_stride = 0; - m_buffer.pop_front(); - } - } - - std::vector interleaved_frags; - - const size_t n = std::min(m_fragment_count, m_interleaved_fragments.size()); - std::move(m_interleaved_fragments.begin(), - m_interleaved_fragments.begin() + n, - std::back_inserter(interleaved_frags)); - m_interleaved_fragments.erase( - m_interleaved_fragments.begin(), - m_interleaved_fragments.begin() + n); - - return interleaved_frags; -} - -} - - -- cgit v1.2.3