466f6b4fc4
The HTTP Streamer can be enabled via the _streamer_enabled_ daemon parameter. When the Streamer is active the daemon starts capturing the configured _Sinks_ up to the maximum number of channels configured by the _streamer_channels_ parameters. The captured PCM samples are split into _streamer_files_num_ files of _streamer_file_duration_ duration (in seconds) for each sink, compressed using AAC LC codec and served via HTTP. The HTTP streamer requires the libfaac-dev package to compile. Please note that since the HTTP Streamer uses the RAVENNA ALSA device for capturing it's not possible to use such device for other audio captures.
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
//
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// utils.cpp
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//
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// Copyright (c) 2019 2020 Andrea Bondavalli. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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//
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#include "utils.hpp"
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#include "log.hpp"
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#include <boost/algorithm/string.hpp>
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#include <boost/format.hpp>
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uint16_t crc16(const uint8_t* p, size_t len) {
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uint8_t x;
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uint16_t crc = 0xFFFF;
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while (len--) {
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x = crc >> 8 ^ *p++;
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x ^= x >> 4;
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crc = (crc << 8) ^ (static_cast<uint16_t>(x << 12)) ^
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(static_cast<uint16_t>(x << 5)) ^ (static_cast<uint16_t>(x));
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}
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return crc;
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}
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std::tuple<bool /* res */,
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std::string /* protocol */,
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std::string /* host */,
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std::string /* port */,
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std::string /* path */>
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parse_url(const std::string& _url) {
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std::string url = httplib::detail::decode_url(_url, false);
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size_t protocol_sep_pos = url.find_first_of("://");
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if (protocol_sep_pos == std::string::npos) {
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/* no protocol, invalid URL */
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return {false, "", "", "", ""};
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}
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std::string port, host, path("/");
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std::string protocol = url.substr(0, protocol_sep_pos);
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std::string url_new = url.substr(protocol_sep_pos + 3);
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size_t path_sep_pos = url_new.find_first_of("/");
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size_t port_sep_pos = url_new.find_first_of(":");
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if (port_sep_pos != std::string::npos) {
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/* port specified */
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if (path_sep_pos != std::string::npos) {
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/* path specified */
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port = url_new.substr(port_sep_pos + 1, path_sep_pos - port_sep_pos - 1);
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path = url_new.substr(path_sep_pos);
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} else {
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/* path not specified */
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port = url_new.substr(port_sep_pos + 1);
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}
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host = url_new.substr(0, port_sep_pos);
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} else if (path_sep_pos != std::string::npos) {
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/* port not specified, path specified */
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host = url_new.substr(0, path_sep_pos);
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path = url_new.substr(path_sep_pos);
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} else {
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/* port and path not specified */
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host = url_new;
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}
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return {host.length() > 0, protocol, host, port, path};
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}
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std::string get_host_node_id(uint32_t ip_addr) {
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std::stringstream ss;
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ip_addr = htonl(ip_addr);
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/* we create an host ID based on the current IP */
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ss << "Daemon "
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<< boost::format("%08x") % ((ip_addr << 16) | (ip_addr >> 16));
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return ss.str();
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}
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std::string sdp_get_subject(const std::string& sdp) {
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std::stringstream sstrem(sdp);
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std::string line;
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while (getline(sstrem, line, '\n')) {
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if (line.substr(0, 2) == "s=") {
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auto subject = line.substr(2);
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boost::trim(subject);
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return subject;
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}
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}
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return "";
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}
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SDPOrigin sdp_get_origin(const std::string& sdp) {
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SDPOrigin origin;
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try {
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std::stringstream sstream(sdp);
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std::string line;
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while (getline(sstream, line, '\n')) {
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boost::trim(line);
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if (line[1] != '=') {
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BOOST_LOG_TRIVIAL(error) << "session_manager:: invalid SDP file";
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break;
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}
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std::string val = line.substr(2);
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if (line[0] == 'o') {
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std::vector<std::string> fields;
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boost::split(fields, val, [line](char c) { return c == ' '; });
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if (fields.size() < 6) {
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BOOST_LOG_TRIVIAL(error) << "session_manager:: invalid origin";
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break;
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}
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origin.username = fields[0];
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origin.session_id = fields[1];
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origin.session_version = std::stoull(fields[2]);
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origin.network_type = fields[3];
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origin.address_type = fields[4];
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origin.unicast_address = fields[5];
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break;
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}
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}
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} catch (...) {
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BOOST_LOG_TRIVIAL(fatal) << "session_manager:: invalid SDP"
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<< ", cannot extract SDP identifier";
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}
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return origin;
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}
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