summaryrefslogtreecommitdiffstats
path: root/src/input/Edi.cpp
blob: 449c221d5292bdac387b6521f86a6ffba1cb1fa9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/*
   Copyright (C) 2009 Her Majesty the Queen in Right of Canada (Communications
   Research Center Canada)

   Copyright (C) 2019
   Matthias P. Braendli, matthias.braendli@mpb.li

    http://www.opendigitalradio.org
   */
/*
   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 <http://www.gnu.org/licenses/>.
   */

#include "input/Edi.h"

#include <regex>
#include <chrono>
#include <stdexcept>
#include <sstream>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <cerrno>
#include <climits>
#include "utils.h"

using namespace std;

namespace Inputs {

constexpr size_t TCP_BLOCKSIZE = 2048;

Edi::Edi(const std::string& name, const dab_input_edi_config_t& config) :
    RemoteControllable(name),
    m_tcp_receive_server(TCP_BLOCKSIZE),
    m_sti_writer(bind(&Edi::m_new_sti_frame_callback, this, placeholders::_1)),
    m_sti_decoder(m_sti_writer),
    m_max_frames_overrun(config.buffer_size),
    m_num_frames_prebuffering(config.prebuffering),
    m_name(name),
    m_stats(name)
{
    constexpr bool VERBOSE = false;
    m_sti_decoder.set_verbose(VERBOSE);

    RC_ADD_PARAMETER(buffermanagement,
            "Set type of buffer management to use [prebuffering, timestamped]");

    RC_ADD_PARAMETER(buffer,
            "Size of the input buffer [24ms frames]");

    RC_ADD_PARAMETER(prebuffering,
            "Min buffer level before streaming starts [24ms frames]");

    RC_ADD_PARAMETER(tistdelay, "TIST delay to add [ms]");
}

Edi::~Edi() {
    m_running = false;
    if (m_thread.joinable()) {
        m_thread.join();
    }
}

void Edi::open(const std::string& name)
{
    const std::regex re_udp("udp://:([0-9]+)");
    const std::regex re_tcp("tcp://(.*):([0-9]+)");

    lock_guard<mutex> lock(m_mutex);

    m_running = false;
    if (m_thread.joinable()) {
        m_thread.join();
    }

    std::smatch m;
    if (std::regex_match(name, m, re_udp)) {
        const int udp_port = std::stoi(m[1].str());
        m_input_used = InputUsed::UDP;
        m_udp_sock.reinit(udp_port);
        m_udp_sock.setBlocking(false);
        // TODO multicast
    }
    else if (std::regex_match(name, m, re_tcp)) {
        m_input_used = InputUsed::TCP;
        const string addr = m[1].str();
        const int tcp_port = std::stoi(m[2].str());
        m_tcp_receive_server.start(tcp_port, addr);
    }
    else {
        throw runtime_error("Cannot parse EDI input URI");
    }

    m_stats.registerAtServer();

    m_running = true;
    m_thread = std::thread(&Edi::m_run, this);
}

size_t Edi::readFrame(uint8_t *buffer, size_t size)
{
    // Save stats data in bytes, not in frames
    m_stats.notifyBuffer(m_frames.size() * size);

    EdiDecoder::sti_frame_t sti;
    if (m_is_prebuffering) {
        m_is_prebuffering = m_frames.size() < m_num_frames_prebuffering;
        if (not m_is_prebuffering) {
            etiLog.level(info) << "EDI input " << m_name << " pre-buffering complete.";
        }
        memset(buffer, 0, size * sizeof(*buffer));
        m_stats.notifyUnderrun();
        return 0;
    }
    else if (not m_pending_sti_frame.frame.empty()) {
        // Can only happen when switching from timestamp-based buffer management!
        if (m_pending_sti_frame.frame.size() != size) {
            etiLog.level(debug) << "EDI input " << m_name << " size mismatch: " <<
                m_pending_sti_frame.frame.size() << " received, " << size << " requested";
            memset(buffer, 0, size * sizeof(*buffer));
            m_stats.notifyUnderrun();
            return 0;
        }
        else {
            if (not m_pending_sti_frame.version_data.version.empty()) {
                m_stats.notifyVersion(
                        m_pending_sti_frame.version_data.version,
                        m_pending_sti_frame.version_data.uptime_s);
            }
            m_stats.notifyPeakLevels(m_pending_sti_frame.audio_levels.left, m_pending_sti_frame.audio_levels.right);

            copy(m_pending_sti_frame.frame.begin(),
                    m_pending_sti_frame.frame.end(),
                    buffer);
            m_pending_sti_frame.frame.clear();
            return size;
        }
    }
    else if (m_frames.try_pop(sti)) {
        if (sti.frame.size() == 0) {
            etiLog.level(debug) << "EDI input " << m_name << " empty frame";
            memset(buffer, 0, size * sizeof(*buffer));
            m_stats.notifyUnderrun();
            return 0;
        }
        else if (sti.frame.size() == size) {
            // Steady-state when everything works well
            if (m_frames.size() > m_max_frames_overrun) {
                m_stats.notifyOverrun();

                /* If the buffer is too full, we drop as many frames as needed
                 * to get down to the prebuffering size. We would like to have our buffer
                 * filled to the prebuffering length. */
                size_t over_max = m_frames.size() - m_num_frames_prebuffering;

                while (over_max--) {
                    EdiDecoder::sti_frame_t discard;
                    m_frames.try_pop(discard);
                }
            }

            if (not sti.version_data.version.empty()) {
                m_stats.notifyVersion(
                        sti.version_data.version,
                        sti.version_data.uptime_s);
            }
            m_stats.notifyPeakLevels(sti.audio_levels.left, sti.audio_levels.right);

            copy(sti.frame.cbegin(), sti.frame.cend(), buffer);
            return size;
        }
        else {
            etiLog.level(debug) << "EDI input " << m_name << " size mismatch: " <<
                sti.frame.size() << " received, " << size << " requested";
            memset(buffer, 0, size * sizeof(*buffer));
            m_stats.notifyUnderrun();
            return 0;
        }
    }
    else {
        memset(buffer, 0, size * sizeof(*buffer));
        m_is_prebuffering = true;
        etiLog.level(info) << "EDI input " << m_name << " re-enabling pre-buffering";
        m_stats.notifyUnderrun();
        return 0;
    }
}

size_t Edi::readFrame(uint8_t *buffer, size_t size, std::time_t seconds, int utco, uint32_t tsta)
{
    if (m_pending_sti_frame.frame.empty()) {
        m_frames.try_pop(m_pending_sti_frame);
    }

    m_stats.notifyBuffer(m_frames.size() * size);

    if (m_is_prebuffering) {
        size_t num_discarded_wrong_size = 0;
        size_t num_discarded_invalid_ts = 0;
        size_t num_discarded_late = 0;

        while (not m_pending_sti_frame.frame.empty()) {
            if (m_pending_sti_frame.frame.size() == size) {
                if (m_pending_sti_frame.timestamp.valid()) {
                    auto ts_req = EdiDecoder::frame_timestamp_t::from_unix_epoch(seconds, utco, tsta);
                    ts_req += m_tist_delay;
                    const double offset = ts_req.diff_s(m_pending_sti_frame.timestamp);

                    if (offset < 0) {
                        // Too far in the future
                        break;
                    }
                    else if (offset < 24e-3) {
                        // Just right
                        m_is_prebuffering = false;
                        etiLog.level(info) <<  "EDI input " << m_name << " valid timestamp, pre-buffering complete." <<
                            " Wrong size: " << num_discarded_wrong_size <<
                            " Invalid TS: " << num_discarded_invalid_ts <<
                            " Late: " << num_discarded_late;

                        if (not m_pending_sti_frame.version_data.version.empty()) {
                            m_stats.notifyVersion(
                                    m_pending_sti_frame.version_data.version,
                                    m_pending_sti_frame.version_data.uptime_s);
                        }

                        m_stats.notifyPeakLevels(m_pending_sti_frame.audio_levels.left,
                                m_pending_sti_frame.audio_levels.right);
                        copy(m_pending_sti_frame.frame.cbegin(), m_pending_sti_frame.frame.cend(), buffer);
                        m_pending_sti_frame.frame.clear();
                        return size;
                    }
                    else {
                        // Too late
                        num_discarded_late++;
                    }
                }
                else {
                    num_discarded_invalid_ts++;
                }
            }
            else {
                num_discarded_wrong_size++;
            }

            m_pending_sti_frame.frame.clear();
            m_frames.try_pop(m_pending_sti_frame);
        }

        if (num_discarded_wrong_size > 0) {
            etiLog.level(warn) << "EDI input " << m_name << ": " <<
                num_discarded_wrong_size << "packets with wrong size.";
        }

        if (num_discarded_invalid_ts > 0) {
            etiLog.level(warn) << "EDI input " << m_name << ": " <<
                num_discarded_wrong_size << "packets with invalid timestamp.";
        }

        memset(buffer, 0, size);
        m_stats.notifyUnderrun();
        return 0;
    }
    else {
        if (m_pending_sti_frame.frame.empty()) {
            etiLog.level(warn) << "EDI input " << m_name <<
                " empty, re-enabling pre-buffering";
            memset(buffer, 0, size);
            m_stats.notifyUnderrun();
            m_is_prebuffering = true;
            return 0;
        }
        else if (not m_pending_sti_frame.timestamp.valid()) {
            etiLog.level(warn) << "EDI input " << m_name <<
                " invalid timestamp, ignoring";
            memset(buffer, 0, size);
            m_pending_sti_frame.frame.clear();
            m_stats.notifyUnderrun();
            return 0;
        }
        else {
            auto ts_req = EdiDecoder::frame_timestamp_t::from_unix_epoch(seconds, utco, tsta);
            ts_req += m_tist_delay;
            const double offset = m_pending_sti_frame.timestamp.diff_s(ts_req);

            if (offset > 24e-3) {
                m_stats.notifyUnderrun();
                m_is_prebuffering = true;
                m_pending_sti_frame.frame.clear();
                etiLog.level(warn) << "EDI input " << m_name <<
                    " timestamp out of bounds, re-enabling pre-buffering";
                memset(buffer, 0, size);
                return 0;
            }
            else {
                if (not m_pending_sti_frame.version_data.version.empty()) {
                    m_stats.notifyVersion(
                            m_pending_sti_frame.version_data.version,
                            m_pending_sti_frame.version_data.uptime_s);
                }

                m_stats.notifyPeakLevels(m_pending_sti_frame.audio_levels.left,
                        m_pending_sti_frame.audio_levels.right);
                copy(m_pending_sti_frame.frame.cbegin(), m_pending_sti_frame.frame.cend(), buffer);
                m_pending_sti_frame.frame.clear();
                return size;
            }
        }
    }
}

void Edi::m_run()
{
    while (m_running) {
        switch (m_input_used) {
            case InputUsed::UDP:
                {
                    constexpr size_t packsize = 2048;
                    const auto packet = m_udp_sock.receive(packsize);
                    if (packet.buffer.size() == packsize) {
                        fprintf(stderr, "Warning, possible UDP truncation\n");
                    }
                    if (not packet.buffer.empty()) {
                        try {
                            m_sti_decoder.push_packet(packet.buffer);
                        }
                        catch (const runtime_error& e) {
                            etiLog.level(warn) << "EDI input " << m_name << " exception: " << e.what();
                            this_thread::sleep_for(chrono::milliseconds(24));
                        }
                    }
                    else {
                        this_thread::sleep_for(chrono::milliseconds(12));
                    }
                }
                break;
            case InputUsed::TCP:
                {
                    auto packet = m_tcp_receive_server.receive();
                    if (not packet.empty()) {
                        try {
                            m_sti_decoder.push_bytes(packet);
                        }
                        catch (const runtime_error& e) {
                            etiLog.level(warn) << "EDI input " << m_name << " exception: " << e.what();
                            this_thread::sleep_for(chrono::milliseconds(24));
                        }
                    }
                    else {
                        this_thread::sleep_for(chrono::milliseconds(12));
                    }
                }
                break;
            default:
                throw logic_error("unimplemented input");
        }
    }
}

void Edi::m_new_sti_frame_callback(EdiDecoder::sti_frame_t&& sti) {
    if (not sti.frame.empty()) {
        // We should not wait here, because we want the complete input buffering
        // happening inside m_frames. Using the blocking function is only a protection
        // against runaway memory usage if something goes wrong in the consumer.
        m_frames.push_wait_if_full(move(sti), m_max_frames_overrun * 2);
    }
}

int Edi::setBitrate(int bitrate)
{
    if (bitrate <= 0) {
        throw invalid_argument("Invalid bitrate " + to_string(bitrate) + " for " + m_name);
    }

    return bitrate;
}

void Edi::close()
{
    m_udp_sock.close();
}


void Edi::set_parameter(const std::string& parameter, const std::string& value)
{
    if (parameter == "buffer") {
        size_t new_limit = atol(value.c_str());
        m_max_frames_overrun = new_limit;
    }
    else if (parameter == "prebuffering") {
        size_t new_limit = atol(value.c_str());
        m_num_frames_prebuffering = new_limit;
    }
    else if (parameter == "buffermanagement") {
        if (value == "prebuffering") {
            setBufferManagement(Inputs::BufferManagement::Prebuffering);
        }
        else if (value == "timestamped") {
            setBufferManagement(Inputs::BufferManagement::Timestamped);
        }
        else {
            throw ParameterError("Invalid value for '" + parameter + "' in controllable " + get_rc_name());
        }
    }
    else if (parameter == "tistdelay") {
        m_tist_delay = chrono::milliseconds(stoi(value));
    }
    else {
        throw ParameterError("Parameter '" + parameter + "' is not exported by controllable " + get_rc_name());
    }
}

const std::string Edi::get_parameter(const std::string& parameter) const
{
    stringstream ss;
    if (parameter == "buffer") {
        ss << m_max_frames_overrun;
    }
    else if (parameter == "prebuffering") {
        ss << m_num_frames_prebuffering;
    }
    else if (parameter == "buffermanagement") {
        switch (getBufferManagement()) {
            case Inputs::BufferManagement::Prebuffering:
                ss << "prebuffering";
                break;
            case Inputs::BufferManagement::Timestamped:
                ss << "Timestamped";
                break;
        }
    }
    else if (parameter == "tistdelay") {
        ss << m_tist_delay.count();
    }
    else {
        throw ParameterError("Parameter '" + parameter + "' is not exported by controllable " + get_rc_name());
    }
    return ss.str();
}

}