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/* ------------------------------------------------------------------
* Copyright (C) 2011 Martin Storsjo
* Copyright (C) 2024 Matthias P. Braendli
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
#include "Outputs.h"
#include <chrono>
#include <string>
#include <stdexcept>
#include <cstring>
#include <cerrno>
#include <cassert>
namespace Output {
using namespace std;
void Base::update_audio_levels(int16_t audiolevel_left, int16_t audiolevel_right)
{
m_audio_left = audiolevel_left;
m_audio_right = audiolevel_right;
}
File::File(const char *filename)
{
m_fd = fopen(filename, "wb");
if (m_fd == nullptr) {
throw runtime_error(string("Error opening output file: ") + strerror(errno));
}
}
File::File(FILE *fd) : m_fd(fd) { }
File::~File() {
if (m_fd) {
fclose(m_fd);
m_fd = nullptr;
}
}
bool File::write_frame(const uint8_t *buf, size_t len)
{
if (m_fd == nullptr) {
throw logic_error("Invalid usage of closed File output");
}
return fwrite(buf, len, 1, m_fd) == 1;
}
ZMQ::ZMQ() :
m_ctx(),
m_sock(m_ctx, ZMQ_PUB)
{
// Do not wait at teardown to send all data out
int linger = 0;
m_sock.setsockopt(ZMQ_LINGER, &linger, sizeof(linger));
}
ZMQ::~ZMQ() {}
void ZMQ::connect(const char *uri, const char *keyfile)
{
if (keyfile) {
fprintf(stderr, "Enabling encryption\n");
int rc = readkey(keyfile, m_secretkey);
if (rc) {
throw runtime_error("Error reading secret key");
}
const int yes = 1;
m_sock.setsockopt(ZMQ_CURVE_SERVER,
&yes, sizeof(yes));
m_sock.setsockopt(ZMQ_CURVE_SECRETKEY,
m_secretkey, CURVE_KEYLEN);
}
m_sock.connect(uri);
}
void ZMQ::set_encoder_type(encoder_selection_t& enc, int bitrate)
{
m_encoder = enc;
m_bitrate = bitrate;
}
bool ZMQ::write_frame(const uint8_t *buf, size_t len)
{
if (m_framebuf.size() != ZMQ_HEADER_SIZE + len) {
m_framebuf.resize(ZMQ_HEADER_SIZE + len);
}
zmq_frame_header_t *zmq_frame_header = (zmq_frame_header_t*)m_framebuf.data();
try {
switch (m_encoder) {
case encoder_selection_t::fdk_dabplus:
zmq_frame_header->encoder = ZMQ_ENCODER_AACPLUS;
break;
case encoder_selection_t::toolame_dab:
zmq_frame_header->encoder = ZMQ_ENCODER_MPEG_L2;
break;
}
zmq_frame_header->version = 1;
zmq_frame_header->datasize = len;
zmq_frame_header->audiolevel_left = m_audio_left;
zmq_frame_header->audiolevel_right = m_audio_right;
assert(ZMQ_FRAME_SIZE(zmq_frame_header) <= m_framebuf.size());
memcpy(ZMQ_FRAME_DATA(zmq_frame_header), buf, len);
m_sock.send(
zmq::const_buffer{m_framebuf.data(), ZMQ_FRAME_SIZE(zmq_frame_header)},
zmq::send_flags::dontwait);
}
catch (zmq::error_t& e) {
fprintf(stderr, "ZeroMQ send error !\n");
return false;
}
return true;
}
EDI::EDI() :
m_clock_tai({})
{ }
EDI::~EDI() { }
void EDI::set_verbose(bool verbose)
{
m_edi_conf.verbose = verbose;
}
void EDI::set_odr_version_tag(const std::string& odr_version_tag)
{
m_odr_version_tag = odr_version_tag;
}
void EDI::add_udp_destination(const std::string& host, unsigned int port)
{
auto dest = make_shared<edi::udp_destination_t>();
dest->dest_addr = host;
dest->dest_port = port;
m_edi_conf.destinations.push_back(dest);
// We cannot carry AF packets over UDP, because they would be too large.
m_edi_conf.enable_pft = true;
}
void EDI::add_tcp_destination(const std::string& host, unsigned int port)
{
auto dest = make_shared<edi::tcp_client_t>();
dest->dest_addr = host;
dest->dest_port = port;
m_edi_conf.destinations.push_back(dest);
m_edi_conf.dump = false;
}
void EDI::set_fec(int fec)
{
m_edi_conf.enable_pft = true;
m_edi_conf.fec = fec;
}
bool EDI::enabled() const
{
return not m_edi_conf.destinations.empty();
}
void EDI::set_tist(bool enable, uint32_t delay_ms)
{
m_tist = enable;
m_delay_ms = delay_ms;
}
bool EDI::write_frame(const uint8_t *buf, size_t len)
{
if (not m_edi_sender) {
m_edi_sender = make_shared<edi::Sender>(m_edi_conf);
}
if (m_edi_time == 0) {
using Sec = chrono::seconds;
const auto now = chrono::time_point_cast<Sec>(chrono::system_clock::now());
m_edi_time = chrono::system_clock::to_time_t(now) + (m_delay_ms / 1000);
m_send_version_at_time = m_edi_time;
/* TODO we still have to see if 24ms granularity is achievable, given that
* one DAB+ super frame is carried over more than 1 ETI frame.
*/
for (int32_t sub_ms = (m_delay_ms % 1000); sub_ms > 0; sub_ms -= 24) {
m_timestamp += 24 << 14; // Shift 24ms by 14 to Timestamp level 2
}
}
edi::TagStarPTR edi_tagStarPtr("DSTI");
m_edi_tagDSTI.stihf = false;
m_edi_tagDSTI.atstf = m_tist;
m_timestamp += 24 << 14; // Shift 24ms by 14 to Timestamp level 2
if (m_timestamp > 0xf9FFff) {
m_timestamp -= 0xfa0000; // Substract 16384000, corresponding to one second
m_edi_time += 1;
m_num_seconds_sent++;
}
m_edi_tagDSTI.set_edi_time(m_edi_time, m_clock_tai.get_offset());
m_edi_tagDSTI.tsta = m_timestamp & 0xffffff;
m_edi_tagDSTI.rfadf = false;
// DFCT is handled inside the TagDSTI
edi::TagSSm edi_tagPayload;
// TODO make edi_tagPayload.stid configurable
edi_tagPayload.istd_data = buf;
edi_tagPayload.istd_length = len;
edi::TagODRAudioLevels edi_tagAudioLevels(m_audio_left, m_audio_right);
edi::TagODRVersion edi_tagVersion(m_odr_version_tag, m_num_seconds_sent);
// The above Tag Items will be assembled into a TAG Packet
edi::TagPacket edi_tagpacket(m_edi_conf.tagpacket_alignment);
// put tags *ptr, DETI and all subchannels into one TagPacket
edi_tagpacket.tag_items.push_back(&edi_tagStarPtr);
edi_tagpacket.tag_items.push_back(&m_edi_tagDSTI);
edi_tagpacket.tag_items.push_back(&edi_tagPayload);
edi_tagpacket.tag_items.push_back(&edi_tagAudioLevels);
// Send version information only every 10 seconds to save bandwidth
if (m_send_version_at_time < m_edi_time) {
m_send_version_at_time += 10;
edi_tagpacket.tag_items.push_back(&edi_tagVersion);
}
m_edi_sender->write(edi_tagpacket);
// TODO Handle TCP disconnect
return true;
}
}
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