Files
voice-cat/tests/test_vad_ptt_devices.cpp
Talon cccf085a87 fix(audio): stereo screen-audio loopback capture on Windows
start_loopback_capture hardcoded channels=1, forcing miniaudio to downmix the system's stereo mix to mono before the encoder saw it -- on_capture_frame then upmixed L=R to produce fake stereo. Now the loopback device opens in the channel's mode (stereo when the channel is stereo), CaptureCallback carries an explicit channels param so the encoder gets real interleaved L/R, and a mono fallback covers unusual render endpoints. New test_loopback_stereo_capture asserts L!=R end-to-end; 18/18 ctest green.
2026-06-17 23:27:59 +02:00

614 lines
25 KiB
C++

/*
* test_vad_ptt_devices — closes M3's "explicitly out of scope" gaps (PROGRESS.md): device
* enumeration, the VAD/PTT send-side input gate, and true stereo playback mixing.
*
* Mirrors test_m3_multistream.cpp's approach (real vc_client instances against a real
* in-process server, not raw sockets) for the ABI-level pieces, plus a white-box AudioEngine
* test for the stereo mixer (no audio hardware needed — see AudioEngine::mix_for_test).
*
* 1. Device enumeration (vc_list_devices) works pre-connect, for both kinds, and tolerates
* an empty list (headless CI build agents may have zero audio devices) — VC_OK is the
* only thing asserted, never count > 0.
* 2. VAD gate: under VC_INPUT_VOICE_ACTIVATION (the default), silent PCM never reaches the
* peer (no talking edge); loud PCM does.
* 3. PTT gate: under VC_INPUT_PUSH_TO_TALK, loud PCM is gated closed until
* vc_set_push_to_talk(1); then it reaches the peer.
* 4. Stereo playback mixer: white-box (AudioEngine directly) — a genuinely stereo decoded
* stream survives into the mix without being downmixed to mono.
*/
#include <cstdio>
#ifdef VOICECAT_HAS_NET
#include <atomic>
#include <chrono>
#include <cmath>
#include <condition_variable>
#include <cstdlib>
#include <filesystem>
#include <mutex>
#include <string>
#include <thread>
#include <vector>
#include "voicecat.h"
#include "server.h"
#include "db.h"
#ifdef VOICECAT_HAS_AUDIO
#include "audio/audio_engine.h"
#endif
#ifdef VOICECAT_HAS_OPUS
#include "codec/opus_codec.h"
#endif
// ── Event tracking (same shape as test_m3_multistream.cpp) ──────────────────────
struct TalkEvent {
uint32_t user_id;
uint32_t stream_id;
bool talking;
};
struct EventStore {
std::mutex mu;
std::condition_variable cv;
bool auth_ok{false};
uint32_t self_user_id{0};
bool channel_list_received{false};
bool saw_stream_started{false};
std::vector<TalkEvent> talk_events;
bool disconnected{false};
const char* label{nullptr};
// Set right after vc_client_create, before vc_connect — lets on_event auto-confirm the
// M4 TOFU gate (VC_EVENT_SERVER_IDENTITY below) for this headless test.
vc_client* client{nullptr};
};
static void on_event(void* user, const vc_event* ev) {
auto* s = static_cast<EventStore*>(user);
std::lock_guard lk(s->mu);
switch (ev->type) {
case VC_EVENT_SERVER_IDENTITY:
// No human to ask in a headless test — trust on first connect unconditionally.
vc_confirm_server_identity(s->client, 1);
break;
case VC_EVENT_AUTH_RESULT:
s->auth_ok = (ev->result == VC_OK);
s->self_user_id = ev->user_id;
break;
case VC_EVENT_CHANNEL_LIST:
s->channel_list_received = true;
break;
case VC_EVENT_STREAM_STARTED:
s->saw_stream_started = true;
break;
case VC_EVENT_TALK_STATE:
s->talk_events.push_back({ev->user_id, ev->stream_id, ev->u32a != 0});
break;
case VC_EVENT_DISCONNECTED:
s->disconnected = true;
break;
default:
break;
}
s->cv.notify_all();
}
template <typename Pred>
static bool wait_for(EventStore& s, Pred pred, int timeout_ms) {
auto deadline = std::chrono::steady_clock::now() + std::chrono::milliseconds(timeout_ms);
std::unique_lock lk(s.mu);
return s.cv.wait_until(lk, deadline, [&] { return pred(s); });
}
static std::vector<int16_t> make_sine_frame(int frame_idx, float freq_hz,
int frame_samples = 960) {
std::vector<int16_t> pcm(frame_samples);
for (int i = 0; i < frame_samples; ++i) {
float t = static_cast<float>(frame_idx * frame_samples + i) / 48000.0f;
pcm[i] = static_cast<int16_t>(std::sin(2.0f * 3.14159265f * freq_hz * t) * 16000.0f);
}
return pcm;
}
static std::vector<int16_t> make_silence_frame(int frame_samples = 960) {
return std::vector<int16_t>(frame_samples, 0);
}
// Did `talking==true` ever fire for (user_id, stream_id) at index >= `from`?
static bool saw_talking_true(EventStore& s, uint32_t user_id, uint32_t stream_id, size_t from) {
std::lock_guard lk(s.mu);
for (size_t i = from; i < s.talk_events.size(); ++i) {
auto& e = s.talk_events[i];
if (e.user_id == user_id && e.stream_id == stream_id && e.talking) return true;
}
return false;
}
static size_t talk_event_count(EventStore& s) {
std::lock_guard lk(s.mu);
return s.talk_events.size();
}
// ── Test harness ──────────────────────────────────────────────────────────────
static int g_failures = 0;
#define CHECK(cond) \
do { \
if (!(cond)) { \
std::printf("FAIL: %s (%s:%d)\n", #cond, __FILE__, __LINE__); \
++g_failures; \
} \
} while (0)
// ── 1. Device enumeration (no server needed) ────────────────────────────────────
static void test_device_enumeration() {
vc_config cfg{"test-devices", "0.1", VC_LOG_OFF};
vc_callbacks cb{};
vc_client* c = vc_client_create(&cfg, cb);
CHECK(c != nullptr);
for (vc_device_kind kind : {VC_DEVICE_INPUT, VC_DEVICE_OUTPUT}) {
vc_device_list dl{};
vc_result r = vc_list_devices(c, kind, &dl);
#ifdef VOICECAT_HAS_AUDIO
CHECK(r == VC_OK);
// Headless CI build agents may legitimately report zero devices — never assert
// count > 0, only that the call itself succeeded and the list is well-formed.
for (size_t i = 0; i < dl.count; ++i) {
CHECK(dl.items[i].id != nullptr);
CHECK(dl.items[i].name != nullptr);
}
#else
CHECK(r == VC_ERR_NOT_IMPLEMENTED);
#endif
vc_free_device_list(&dl);
vc_free_device_list(&dl); // idempotent — must not crash on a second call
}
vc_client_destroy(c);
std::printf("test_device_enumeration: ok\n");
}
// ── 4. Stereo playback mixer (white-box, no audio hardware needed) ──────────────
#if defined(VOICECAT_HAS_AUDIO) && defined(VOICECAT_HAS_OPUS)
static void test_stereo_mix() {
voicecat::audio::AudioEngine engine;
voicecat::audio::AudioParams p;
p.sample_rate = 48000;
p.capture_channels = 1;
p.playback_channels = 2;
p.frame_ms = 20;
CHECK(engine.start(p)); // capture_cb intentionally omitted — not exercised here
voicecat::codec::OpusParams stereo_params;
stereo_params.stereo = true;
int frame_samples = voicecat::codec::opus_frame_samples(stereo_params);
voicecat::codec::OpusEncoder enc;
CHECK(enc.init(stereo_params));
// Loud left channel, silent right channel — a real downmix would average them into a
// single audible-but-quieter centered sample; true stereo should keep them distinct.
std::vector<int16_t> interleaved(static_cast<size_t>(frame_samples) * 2);
for (int i = 0; i < frame_samples; ++i) {
float t = static_cast<float>(i) / 48000.0f;
interleaved[i * 2] = static_cast<int16_t>(std::sin(2.0f * 3.14159265f * 440.0f * t) * 20000.0f);
interleaved[i * 2 + 1] = 0;
}
uint8_t opus_buf[1500];
int opus_len = enc.encode(interleaved.data(), frame_samples, opus_buf, sizeof(opus_buf));
CHECK(opus_len > 0);
engine.init_recv_stream(/*ssrc=*/1, stereo_params);
voicecat::audio::JitterBuffer::Frame f;
f.seq = 0;
f.timestamp = 0;
f.fec_present = false;
f.payload.assign(opus_buf, opus_buf + opus_len);
engine.push_recv_frame(1, std::move(f));
std::vector<int16_t> out(static_cast<size_t>(frame_samples) * 2, 0);
engine.mix_for_test(out.data(), static_cast<uint32_t>(frame_samples));
// If the engine downmixed (old M3 behavior), every L/R pair would be identical (the
// average of a loud sample and 0). True stereo should show a clear, consistent L != R
// difference across the frame.
int64_t total_diff = 0;
for (int i = 0; i < frame_samples; ++i)
total_diff += std::abs(static_cast<int>(out[i * 2]) - static_cast<int>(out[i * 2 + 1]));
CHECK(total_diff > static_cast<int64_t>(frame_samples) * 1000); // well above decode noise
engine.remove_stream(1);
engine.stop();
std::printf("test_stereo_mix: ok (total_diff=%lld)\n", static_cast<long long>(total_diff));
}
// ── 4a-2. Stereo screen-audio loopback capture (white-box, no audio hardware needed) ──
// Regression for the mono-loopback bug: start_loopback_capture used to hardcode channels=1,
// downmixing the system's stereo mix to mono before the encoder ever saw it (and on_capture_frame
// then upmixed L=R to produce a fake-stereo bitstream). Now the loopback device opens in the
// channel's mode (stereo when the channel is stereo), so the encoder receives real interleaved
// L/R PCM and encodes it directly. This test drives feed_loopback_for_test with a loud-L /
// silent-R stereo signal, encodes it (as on_capture_frame now does for channels==2), decodes,
// and mixes — asserting L != R across the frame. A mono-downmixed-then-upmixed bitstream would
// have L == R. Mirrors test_stereo_mix but routes the encode side through the loopback
// accumulator path that the fix touches (feed_loopback_for_test → on_loopback's accumulator).
#if defined(VOICECAT_HAS_LOOPBACK) && defined(VOICECAT_HAS_OPUS)
static void test_loopback_stereo_capture() {
voicecat::audio::AudioEngine engine;
voicecat::audio::AudioParams p;
p.sample_rate = 48000;
p.capture_channels = 1; // mic path — irrelevant here; loopback has its own channel count
p.playback_channels = 2; // stereo mix output (for mix_for_test below)
p.frame_ms = 20;
CHECK(engine.start(p)); // no capture_cb — the real mic (if any) won't touch capture_accum_
voicecat::codec::OpusParams stereo_params;
stereo_params.stereo = true;
stereo_params.application = voicecat::codec::OpusApplication::Audio; // screen-audio channel
stereo_params.bitrate_bps = 128000; // music/screen-audio channel default
int frame_samples = voicecat::codec::opus_frame_samples(stereo_params);
voicecat::codec::OpusEncoder enc;
CHECK(enc.init(stereo_params));
// Loud left channel, silent right — a real mono downmix would average them into a single
// audible-but-quieter centered sample; true stereo keeps them distinct.
std::vector<int16_t> interleaved(static_cast<size_t>(frame_samples) * 2);
for (int i = 0; i < frame_samples; ++i) {
float t = static_cast<float>(i) / 48000.0f;
interleaved[i * 2] = static_cast<int16_t>(std::sin(2.0f * 3.14159265f * 440.0f * t) * 20000.0f);
interleaved[i * 2 + 1] = 0;
}
// Encode via the loopback accumulator path: feed_loopback_for_test drives on_loopback's
// accumulator and invokes the callback with channels=2 (the fix). The callback encodes
// exactly as on_capture_frame does for real-stereo SCREEN_AUDIO PCM — no upmix.
uint8_t opus_buf[1500];
int opus_len = 0;
int seen_channels = 0;
auto cb = [&](int /*kind*/, const int16_t* pcm, int /*samples*/, int channels) {
seen_channels = channels;
if (channels == 2) {
// The loopback accumulator must have preserved L/R distinctness pre-encode.
int64_t pre_diff = 0;
for (int i = 0; i < frame_samples; ++i)
pre_diff += std::abs(static_cast<int>(pcm[i * 2]) - static_cast<int>(pcm[i * 2 + 1]));
CHECK(pre_diff > static_cast<int64_t>(frame_samples) * 1000);
}
opus_len = enc.encode(pcm, frame_samples, opus_buf, sizeof(opus_buf));
};
engine.feed_loopback_for_test(interleaved.data(), frame_samples, 2, cb);
CHECK(seen_channels == 2); // the loopback path reported stereo, not downmixed mono
CHECK(opus_len > 0);
// Decode + mix — same recv path as test_stereo_mix. A real stereo bitstream should
// survive with L != R; a mono-downmixed-then-upmixed bitstream would have L == R.
engine.init_recv_stream(/*ssrc=*/3, stereo_params);
voicecat::audio::JitterBuffer::Frame f;
f.seq = 0;
f.timestamp = 0;
f.fec_present = false;
f.payload.assign(opus_buf, opus_buf + opus_len);
engine.push_recv_frame(3, std::move(f));
std::vector<int16_t> out(static_cast<size_t>(frame_samples) * 2, 0);
engine.mix_for_test(out.data(), static_cast<uint32_t>(frame_samples));
int64_t total_diff = 0;
for (int i = 0; i < frame_samples; ++i)
total_diff += std::abs(static_cast<int>(out[i * 2]) - static_cast<int>(out[i * 2 + 1]));
CHECK(total_diff > static_cast<int64_t>(frame_samples) * 1000);
engine.remove_stream(3);
engine.stop();
std::printf("test_loopback_stereo_capture: ok (total_diff=%lld, seen_channels=%d)\n",
static_cast<long long>(total_diff), seen_channels);
}
#endif
// ── 4b. Playout-clock re-sync after a late join / silence gap ────────────────────
// Regression for the "talk indicator lit, no audio" bug: the playout clock free-runs (it
// advances every callback via PLC), while the sender's frame timestamps only advance while it
// is actually transmitting. After a silence gap or a late join the clock drifts past the jitter
// buffer's 500 ms late-drop window, so every real frame is dropped-as-late and the stream is
// permanently silent. on_playback must re-seed the clock to the earliest buffered frame.
static void test_playout_resync() {
voicecat::audio::AudioEngine engine;
voicecat::audio::AudioParams p;
p.sample_rate = 48000;
p.capture_channels = 1;
p.playback_channels = 2;
p.frame_ms = 20;
CHECK(engine.start(p));
voicecat::codec::OpusParams mono_params; // mono = the mic path
mono_params.stereo = false;
int frame_samples = voicecat::codec::opus_frame_samples(mono_params);
voicecat::codec::OpusEncoder enc;
CHECK(enc.init(mono_params));
std::vector<int16_t> sine(static_cast<size_t>(frame_samples));
for (int i = 0; i < frame_samples; ++i) {
float t = static_cast<float>(i) / 48000.0f;
sine[i] = static_cast<int16_t>(std::sin(2.0f * 3.14159265f * 440.0f * t) * 20000.0f);
}
uint8_t opus_buf[1500];
int opus_len = enc.encode(sine.data(), frame_samples, opus_buf, sizeof(opus_buf));
CHECK(opus_len > 0);
engine.init_recv_stream(/*ssrc=*/2, mono_params);
std::vector<int16_t> out(static_cast<size_t>(frame_samples) * 2, 0);
// Free-run the playout clock with an empty jitter buffer (PLC every callback) far past the
// 500 ms late-drop window — this is what a silence gap / late join does in the field.
for (int i = 0; i < 100; ++i) // ~100 frames @ 20 ms = ~2 s, well past 500 ms
engine.mix_for_test(out.data(), static_cast<uint32_t>(frame_samples));
// Now a real frame arrives carrying a timestamp far behind the free-run clock. Without the
// re-sync it is dropped-as-late and playback stays silent; with it the clock snaps back and
// the frame is decoded and mixed.
voicecat::audio::JitterBuffer::Frame f;
f.seq = 0;
f.timestamp = 0; // stream-relative start, now far behind the drifted playout clock
f.fec_present = false;
f.payload.assign(opus_buf, opus_buf + opus_len);
engine.push_recv_frame(2, std::move(f));
std::fill(out.begin(), out.end(), 0);
engine.mix_for_test(out.data(), static_cast<uint32_t>(frame_samples));
int64_t energy = 0;
for (int16_t s : out) energy += std::abs(static_cast<int>(s));
CHECK(energy > static_cast<int64_t>(frame_samples) * 1000); // audible, not PLC silence
engine.remove_stream(2);
engine.stop();
std::printf("test_playout_resync: ok (energy=%lld)\n", static_cast<long long>(energy));
}
#endif // VOICECAT_HAS_AUDIO && VOICECAT_HAS_OPUS
// ── 5. Capture-frame accumulation (white-box, no audio hardware needed) ──────────
// Regression for the capture-side analogue of the playback ring fix: miniaudio's capture
// callback fires at the hardware period (commonly 480 samples on WASAPI shared mode), while
// opus_encode() requires exactly frame_samples_ (960). Sub-frame chunks must be accumulated;
// the callback must receive exactly 960-sample frames regardless of input chunk size.
#ifdef VOICECAT_HAS_AUDIO
static void test_capture_frame_accumulation() {
voicecat::audio::AudioEngine engine;
voicecat::audio::AudioParams p;
p.sample_rate = 48000;
p.capture_channels = 1;
p.frame_ms = 20; // frame_samples_ = 960
std::atomic<int> call_count{0};
std::atomic<bool> wrong_size{false};
constexpr int kExpected = 960;
// Start WITHOUT a capture callback: the real mic (if any) fires on_capture(), but
// on_capture() returns immediately when capture_cb_ is null, so capture_accum_ is
// never touched by the hardware thread. feed_capture_for_test() bypasses capture_cb_
// and drives the same accumulator directly with the explicit `cb` below — no races.
CHECK(engine.start(p));
auto cb = [&](int /*kind*/, const int16_t* /*pcm*/, int samples, int /*channels*/) {
++call_count;
if (samples != kExpected) wrong_size.store(true);
};
// 480-sample (10 ms) input — WASAPI's common hardware period on modern Windows.
// Two 480-chunk inputs → exactly one callback at 960.
std::vector<int16_t> h(480, 1000);
engine.feed_capture_for_test(h.data(), 480, cb);
CHECK(call_count.load() == 0); // half a frame — no callback yet
engine.feed_capture_for_test(h.data(), 480, cb);
CHECK(call_count.load() == 1); // one full frame — callback fired once
// Mis-aligned split: 240 then 720 → still exactly one callback.
std::vector<int16_t> s(240, 500), l(720, 500);
engine.feed_capture_for_test(s.data(), 240, cb);
CHECK(call_count.load() == 1);
engine.feed_capture_for_test(l.data(), 720, cb);
CHECK(call_count.load() == 2);
// 1920-sample input (two Opus frames) → exactly two callbacks.
std::vector<int16_t> d(1920, 800);
engine.feed_capture_for_test(d.data(), 1920, cb);
CHECK(call_count.load() == 4);
CHECK(!wrong_size.load());
engine.stop();
std::printf("test_capture_frame_accumulation: ok (callbacks=%d)\n", call_count.load());
}
#endif // VOICECAT_HAS_AUDIO
// ── 2/3. VAD + PTT gate, through the real ABI against a real server ─────────────
static void test_vad_and_ptt_gate() {
auto tmp = std::filesystem::temp_directory_path() /
("vctest_vadptt_" + std::to_string(
std::chrono::steady_clock::now().time_since_epoch().count()));
std::filesystem::create_directories(tmp);
std::string data_dir = tmp.string();
std::atomic<uint16_t> bound_port{0};
std::mutex ready_mu;
std::condition_variable ready_cv;
bool ready{false};
voicecat::server::Config cfg;
cfg.data_dir = data_dir;
cfg.bind_port = 0;
cfg.media_port = 0;
cfg.server_name = "VoiceCat-VadPttTest";
cfg.allow_guests = true;
cfg.on_ready = [&](uint16_t p) {
bound_port.store(p);
{ std::lock_guard lk(ready_mu); ready = true; }
ready_cv.notify_all();
};
voicecat::server::Server server(cfg);
std::thread server_thread([&] { server.run(); });
{
std::unique_lock lk(ready_mu);
bool ok = ready_cv.wait_for(lk, std::chrono::seconds(10), [&] { return ready; });
if (!ok) {
std::printf("FAIL: server did not become ready within 10s\n");
++g_failures;
server.stop();
server_thread.join();
std::filesystem::remove_all(tmp);
return;
}
}
uint16_t port = bound_port.load();
std::printf("test_vad_and_ptt_gate: server ready on :%u\n", port);
EventStore evA;
evA.label = "A";
vc_callbacks cbA{on_event, nullptr, &evA};
vc_config cfgA{"test-A", "0.1", VC_LOG_OFF};
vc_client* clientA = vc_client_create(&cfgA, cbA);
CHECK(clientA != nullptr);
evA.client = clientA;
CHECK(vc_connect(clientA, "127.0.0.1", port) == VC_OK);
CHECK(vc_authenticate_guest(clientA, "VP-A") == VC_OK);
CHECK(wait_for(evA, [](EventStore& s) { return s.auth_ok; }, 8000));
CHECK(wait_for(evA, [](EventStore& s) { return s.channel_list_received; }, 3000));
EventStore evB;
evB.label = "B";
vc_callbacks cbB{on_event, nullptr, &evB};
vc_config cfgB{"test-B", "0.1", VC_LOG_OFF};
vc_client* clientB = vc_client_create(&cfgB, cbB);
CHECK(clientB != nullptr);
evB.client = clientB;
CHECK(vc_connect(clientB, "127.0.0.1", port) == VC_OK);
CHECK(vc_authenticate_guest(clientB, "VP-B") == VC_OK);
CHECK(wait_for(evB, [](EventStore& s) { return s.auth_ok; }, 8000));
CHECK(wait_for(evB, [](EventStore& s) { return s.channel_list_received; }, 3000));
uint32_t a_uid = 0;
{ std::lock_guard lk(evA.mu); a_uid = evA.self_user_id; }
std::this_thread::sleep_for(std::chrono::milliseconds(500));
vc_stream_desc mic_desc{};
mic_desc.kind = VC_STREAM_MIC;
mic_desc.label = "mic";
uint32_t mic_sid = 0;
CHECK(vc_stream_start(clientA, &mic_desc, &mic_sid) == VC_OK);
CHECK(wait_for(evB, [](EventStore& s) { return s.saw_stream_started; }, 5000));
CHECK(wait_for(evA, [](EventStore& s) { return s.saw_stream_started; }, 5000));
// ── 2a. VAD mode (default), silent PCM: must NOT reach B as a talking edge ──
CHECK(vc_set_input_mode(clientA, VC_INPUT_VOICE_ACTIVATION) == VC_OK);
for (int i = 0; i < 15; ++i) {
auto silence = make_silence_frame();
CHECK(vc_test_inject_capture(clientA, mic_sid, silence.data(), silence.size()) == VC_OK);
std::this_thread::sleep_for(std::chrono::milliseconds(20));
}
CHECK(!saw_talking_true(evB, a_uid, mic_sid, 0));
// ── 2b. VAD mode, loud PCM: must reach B as a talking edge ──────────────────
size_t mark = talk_event_count(evB);
for (int i = 0; i < 20; ++i) {
auto loud = make_sine_frame(i, 440.0f);
CHECK(vc_test_inject_capture(clientA, mic_sid, loud.data(), loud.size()) == VC_OK);
std::this_thread::sleep_for(std::chrono::milliseconds(20));
}
CHECK(wait_for(evB, [&](EventStore& s) {
for (size_t i = mark; i < s.talk_events.size(); ++i) {
auto& e = s.talk_events[i];
if (e.user_id == a_uid && e.stream_id == mic_sid && e.talking) return true;
}
return false;
}, 3000));
// ── 3a. PTT mode, key up: loud PCM must NOT reach B as a new talking edge ───
CHECK(vc_set_input_mode(clientA, VC_INPUT_PUSH_TO_TALK) == VC_OK);
CHECK(vc_set_push_to_talk(clientA, 0) == VC_OK);
// Let any in-flight VAD-driven talking state lapse (hang-time ~300ms) before measuring.
std::this_thread::sleep_for(std::chrono::milliseconds(500));
mark = talk_event_count(evB);
for (int i = 0; i < 20; ++i) {
auto loud = make_sine_frame(i, 440.0f);
CHECK(vc_test_inject_capture(clientA, mic_sid, loud.data(), loud.size()) == VC_OK);
std::this_thread::sleep_for(std::chrono::milliseconds(20));
}
std::this_thread::sleep_for(std::chrono::milliseconds(200));
CHECK(!saw_talking_true(evB, a_uid, mic_sid, mark));
// ── 3b. PTT mode, key down: loud PCM must reach B as a talking edge ─────────
CHECK(vc_set_push_to_talk(clientA, 1) == VC_OK);
mark = talk_event_count(evB);
for (int i = 0; i < 20; ++i) {
auto loud = make_sine_frame(i, 440.0f);
CHECK(vc_test_inject_capture(clientA, mic_sid, loud.data(), loud.size()) == VC_OK);
std::this_thread::sleep_for(std::chrono::milliseconds(20));
}
CHECK(wait_for(evB, [&](EventStore& s) {
for (size_t i = mark; i < s.talk_events.size(); ++i) {
auto& e = s.talk_events[i];
if (e.user_id == a_uid && e.stream_id == mic_sid && e.talking) return true;
}
return false;
}, 3000));
{ std::lock_guard lk(evA.mu); CHECK(!evA.disconnected); }
{ std::lock_guard lk(evB.mu); CHECK(!evB.disconnected); }
vc_disconnect(clientA);
vc_disconnect(clientB);
vc_client_destroy(clientA);
vc_client_destroy(clientB);
server.stop();
server_thread.join();
std::filesystem::remove_all(tmp);
std::printf("test_vad_and_ptt_gate: done\n");
}
int main() {
test_device_enumeration();
#if defined(VOICECAT_HAS_AUDIO) && defined(VOICECAT_HAS_OPUS)
test_stereo_mix();
#if defined(VOICECAT_HAS_LOOPBACK)
test_loopback_stereo_capture();
#endif
test_playout_resync();
#endif
#ifdef VOICECAT_HAS_AUDIO
test_capture_frame_accumulation();
#endif
test_vad_and_ptt_gate();
if (g_failures == 0) {
std::printf("vad_ptt_devices: all checks passed\n");
return 0;
}
std::printf("vad_ptt_devices: %d failure(s)\n", g_failures);
return 1;
}
#else // !VOICECAT_HAS_NET
int main() {
std::printf("vad_ptt_devices: SKIP (VOICECAT_HAS_NET not defined)\n");
return 0;
}
#endif // VOICECAT_HAS_NET