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Add seed option #11

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Add seed option #11

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c43d4e6
Add seed option
0xAlexisSys May 9, 2026
4c0ce67
Move FFI seed option to `ptt_stream_start`
0xAlexisSys May 10, 2026
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11 changes: 9 additions & 2 deletions pocket_tts.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,7 @@ struct Config {
std::string models_dir = "models", tokenizer_path = "models/tokenizer.model";
std::string voices_dir = "voices";
std::string precision = "int8";
uint64_t seed = 0;
float temperature = 0.7f;
float eos_threshold = -4.0f;
float noise_clamp = 0.0f;
Expand Down Expand Up @@ -217,6 +218,8 @@ float normal(float mean = 0, float stddev = 1) {
void fill_normal(float* data, size_t n, float mean = 0, float stddev = 1) {
for (size_t i = 0; i < n; ++i) data[i] = normal(mean, stddev);
}

void set_seed(uint64_t new_seed) { seed(new_seed == 0 ? uint64_t(std::chrono::high_resolution_clock::now().time_since_epoch().count()) : new_seed); }
} // namespace rng

// ── Audio Resampling (Lanczos) ──────────────────────────────────────────────
Expand Down Expand Up @@ -1396,7 +1399,7 @@ class PocketTTS {
static constexpr int SR = 24000;

explicit PocketTTS(const Config& cfg = {}) : cfg_(cfg) {
rng::seed(uint64_t(std::chrono::high_resolution_clock::now().time_since_epoch().count()));
rng::set_seed(cfg.seed);
tok_ = std::make_unique<Tokenizer>(cfg_.tokenizer_path);

// Thread budget: --threads sets the total. During pipelined streaming,
Expand Down Expand Up @@ -2603,8 +2606,10 @@ struct ptt_stream_ctx {
bool aborted = false;
};

void* ptt_stream_start(void* handle, const char* text, const char* voice) {
void* ptt_stream_start(void* handle, const char* text, const char* voice, uint64_t seed) {
if (!handle || !text || !voice) return nullptr;
pocket_tts::rng::set_seed(seed);

auto* tts = static_cast<pocket_tts::PocketTTS*>(handle);
auto* ctx = new ptt_stream_ctx();

Expand Down Expand Up @@ -2702,6 +2707,7 @@ int main(int argc, char* argv[]) {
" " << argv[0] << " --server [OPTIONS]\n"
"\nOptions:\n"
" --precision <int8|fp32> Model precision (default: int8)\n"
" --seed <ulong> Inference seed (default: 0 = random)\n"
" --temperature <float> Sampling temperature (default: 0.7)\n"
" --lsd-steps <int> Flow matching steps (default: 1)\n"
" --threads <int> Total thread budget (default: 0 = half cores)\n"
Expand All @@ -2724,6 +2730,7 @@ int main(int argc, char* argv[]) {
return 0;
}
else if (a == "--precision") cfg.precision = next();
else if (a == "--seed") cfg.seed = std::stoul(next());
else if (a == "--temperature") cfg.temperature = std::stof(next());
else if (a == "--lsd-steps") cfg.lsd_steps = std::stoi(next());
else if (a == "--threads") cfg.num_threads = std::stoi(next());
Expand Down