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/* ------------------------------------------------------------------
* Copyright (C) 2011 Martin Storsjo
* Copyright (C) 2019 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 <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)
{
switch (m_encoder) {
case encoder_selection_t::fdk_dabplus:
return send_frame(buf, len);
case encoder_selection_t::toolame_dab:
return write_toolame(buf, len);
}
throw logic_error("Unhandled encoder in ZMQ::write_frame");
}
bool ZMQ::write_toolame(const uint8_t *buf, size_t len)
{
m_toolame_buffer.insert(m_toolame_buffer.end(),
buf, buf + len);
// ODR-DabMux expects frames of length 3*bitrate
const auto frame_len = 3 * m_bitrate;
while (m_toolame_buffer.size() > frame_len) {
vec_u8 frame(frame_len);
// this is probably not very efficient
std::copy(m_toolame_buffer.begin(), m_toolame_buffer.begin() + frame_len, frame.begin());
bool success = send_frame(frame.data(), frame.size());
if (not success) {
return false;
}
m_toolame_buffer.erase(m_toolame_buffer.begin(), m_toolame_buffer.begin() + frame_len);
}
return true;
}
bool ZMQ::send_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_FDK;
break;
case encoder_selection_t::toolame_dab:
zmq_frame_header->encoder = ZMQ_ENCODER_TOOLAME;
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(m_framebuf.data(), ZMQ_FRAME_SIZE(zmq_frame_header),
ZMQ_DONTWAIT);
}
catch (zmq::error_t& e) {
fprintf(stderr, "ZeroMQ send error !\n");
return false;
}
return true;
}
}
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