Delete common.cpp

common.cpp

@@ -1,911 +0,0 @@
-#define _USE_MATH_DEFINES // for M_PI
-
-#include "common.h"
-
-// third-party utilities
-// use your favorite implementations
-#define DR_WAV_IMPLEMENTATION
-#include "dr_wav.h"
-
-#include <cmath>
-#include <cstring>
-#include <fstream>
-#include <regex>
-#include <locale>
-#include <codecvt>
-#include <sstream>
-
-#if defined(_MSC_VER)
-#pragma warning(disable: 4244 4267) // possible loss of data
-#endif
-
-#ifdef _WIN32
-#include <fcntl.h>
-#include <io.h>
-#endif
-
-#ifdef WHISPER_FFMPEG
-// as implemented in ffmpeg_trancode.cpp only embedded in common lib if whisper built with ffmpeg support
-extern bool ffmpeg_decode_audio(const std::string & ifname, std::vector<uint8_t> & wav_data);
-#endif
-
-// Function to check if the next argument exists
-static std::string get_next_arg(int& i, int argc, char** argv, const std::string& flag, gpt_params& params) {
-    if (i + 1 < argc && argv[i + 1][0] != '-') {
-        return argv[++i];
-    } else {
-        fprintf(stderr, "error: %s requires one argument.\n", flag.c_str());
-        gpt_print_usage(argc, argv, params);
-        exit(0);
-    }
-}
-
-bool gpt_params_parse(int argc, char ** argv, gpt_params & params) {
-    for (int i = 1; i < argc; i++) {
-        std::string arg = argv[i];
-
-        if (arg == "-s" || arg == "--seed") {
-            params.seed = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-t" || arg == "--threads") {
-            params.n_threads = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-p" || arg == "--prompt") {
-            params.prompt = get_next_arg(i, argc, argv, arg, params);
-        } else if (arg == "-n" || arg == "--n_predict") {
-            params.n_predict = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-np" || arg == "--n_parallel") {
-            params.n_parallel = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "--top_k") {
-            params.top_k = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "--top_p") {
-            params.top_p = std::stof(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "--temp") {
-            params.temp = std::stof(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "--repeat-last-n") {
-            params.repeat_last_n = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "--repeat-penalty") {
-            params.repeat_penalty = std::stof(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-b" || arg == "--batch_size") {
-            params.n_batch= std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-c" || arg == "--context") {
-            params.n_ctx= std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-ngl" || arg == "--gpu-layers" || arg == "--n-gpu-layers") {
-            params.n_gpu_layers = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "--ignore-eos") {
-            params.ignore_eos = true;
-        } else if (arg == "-m" || arg == "--model") {
-            params.model = get_next_arg(i, argc, argv, arg, params);
-        } else if (arg == "-i" || arg == "--interactive") {
-            params.interactive = true;
-        } else if (arg == "-ip" || arg == "--interactive-port") {
-            params.interactive = true;
-            params.interactive_port = std::stoi(get_next_arg(i, argc, argv, arg, params));
-        } else if (arg == "-h" || arg == "--help") {
-            gpt_print_usage(argc, argv, params);
-            exit(0);
-        } else if (arg == "-f" || arg == "--file") {
-            get_next_arg(i, argc, argv, arg, params);
-            std::ifstream file(argv[i]);
-            if (!file) {
-                fprintf(stderr, "error: failed to open file '%s'\n", argv[i]);
-                break;
-            }
-            std::copy(std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>(), back_inserter(params.prompt));
-            if (params.prompt.back() == '\n') {
-                params.prompt.pop_back();
-            }
-        } else if (arg == "-tt" || arg == "--token_test") {
-            params.token_test = get_next_arg(i, argc, argv, arg, params);
-        }
-        else {
-            fprintf(stderr, "error: unknown argument: %s\n", arg.c_str());
-            gpt_print_usage(argc, argv, params);
-            exit(0);
-        }
-    }
-
-    return true;
-}
-
-void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) {
-    fprintf(stderr, "usage: %s [options]\n", argv[0]);
-    fprintf(stderr, "\n");
-    fprintf(stderr, "options:\n");
-    fprintf(stderr, "  -h, --help            show this help message and exit\n");
-    fprintf(stderr, "  -s SEED, --seed SEED  RNG seed (default: -1)\n");
-    fprintf(stderr, "  -t N, --threads N     number of threads to use during computation (default: %d)\n", params.n_threads);
-    fprintf(stderr, "  -p PROMPT, --prompt PROMPT\n");
-    fprintf(stderr, "                        prompt to start generation with (default: random)\n");
-    fprintf(stderr, "  -f FNAME, --file FNAME\n");
-    fprintf(stderr, "                        load prompt from a file\n");
-    fprintf(stderr, "  -tt TOKEN_TEST, --token_test TOKEN_TEST\n");
-    fprintf(stderr, "                        test tokenization\n");
-    fprintf(stderr, "  -n N, --n_predict N   number of tokens to predict (default: %d)\n", params.n_predict);
-    fprintf(stderr, "  --top_k N             top-k sampling (default: %d)\n", params.top_k);
-    fprintf(stderr, "  --top_p N             top-p sampling (default: %.1f)\n", params.top_p);
-    fprintf(stderr, "  --temp N              temperature (default: %.1f)\n", params.temp);
-    fprintf(stderr, "  --repeat-last-n N     last n tokens to consider for penalize (default: %d, 0 = disabled)\n", params.repeat_last_n);
-    fprintf(stderr, "  --repeat-penalty N    penalize repeat sequence of tokens (default: %.2f, 1.0 = disabled)\n", (double)params.repeat_penalty);
-    fprintf(stderr, "  -b N, --batch_size N  batch size for prompt processing (default: %d)\n", params.n_batch);
-    fprintf(stderr, "  -c N, --context N     context / KV cache size (default: %d)\n", params.n_ctx);
-    fprintf(stderr, "  --ignore-eos          ignore EOS token during generation\n");
-    fprintf(stderr, "  -ngl N, --gpu-layers N  number of layers to offload to GPU on supported models (default: %d)\n", params.n_gpu_layers);
-    fprintf(stderr, "  -m FNAME, --model FNAME\n");
-    fprintf(stderr, "                        model path (default: %s)\n", params.model.c_str());
-    fprintf(stderr, "\n");
-}
-
-std::string gpt_random_prompt(std::mt19937 & rng) {
-    const int r = rng() % 10;
-    switch (r) {
-        case 0: return "So";
-        case 1: return "Once upon a time";
-        case 2: return "When";
-        case 3: return "The";
-        case 4: return "After";
-        case 5: return "If";
-        case 6: return "import";
-        case 7: return "He";
-        case 8: return "She";
-        case 9: return "They";
-    }
-
-    return "The";
-}
-
-std::string trim(const std::string & s) {
-    std::regex e("^\\s+|\\s+$");
-    return std::regex_replace(s, e, "");
-}
-
-std::string replace(const std::string & s, const std::string & from, const std::string & to) {
-    std::string result = s;
-    size_t pos = 0;
-    while ((pos = result.find(from, pos)) != std::string::npos) {
-        result.replace(pos, from.length(), to);
-        pos += to.length();
-    }
-    return result;
-}
-
-void gpt_vocab::add_special_token(const std::string & token) {
-    special_tokens.push_back(token);
-}
-
-std::map<std::string, int32_t> json_parse(const std::string & fname) {
-    std::map<std::string, int32_t> result;
-
-    // read file into string
-    std::string json;
-    {
-        std::ifstream ifs(fname);
-        if (!ifs) {
-            fprintf(stderr, "Failed to open %s\n", fname.c_str());
-            exit(1);
-        }
-
-        json = std::string((std::istreambuf_iterator<char>(ifs)),
-                (std::istreambuf_iterator<char>()));
-    }
-
-    if (json[0] != '{') {
-        return result;
-    }
-
-    // parse json
-    {
-        bool has_key  = false;
-        bool in_token = false;
-
-        std::string str_key = "";
-        std::string str_val = "";
-
-        int n = json.size();
-        for (int i = 1; i < n; ++i) {
-            if (!in_token) {
-                if (json[i] == ' ') continue;
-                if (json[i] == '"') {
-                    in_token = true;
-                    continue;
-                }
-            } else {
-                if (json[i] == '\\' && i+1 < n) {
-                    if (has_key == false) {
-                        str_key += json[i];
-                    } else {
-                        str_val += json[i];
-                    }
-                    ++i;
-                } else if (json[i] == '"') {
-                    if (has_key == false) {
-                        has_key = true;
-                        ++i;
-                        while (json[i] == ' ') ++i;
-                        ++i; // :
-                        while (json[i] == ' ') ++i;
-                        if (json[i] != '\"') {
-                            while (json[i] != ',' && json[i] != '}') {
-                                str_val += json[i++];
-                            }
-                            has_key = false;
-                        } else {
-                            in_token = true;
-                            continue;
-                        }
-                    } else {
-                        has_key = false;
-                    }
-
-                    str_key = ::replace(str_key, "\\u0120", " " ); // \u0120 -> space
-                    str_key = ::replace(str_key, "\\u010a", "\n"); // \u010a -> new line
-                    str_key = ::replace(str_key, "\\\"",    "\""); // \\\"   -> "
-
-                    try {
-                        result[str_key] = std::stoi(str_val);
-                    } catch (...) {
-                        //fprintf(stderr, "%s: ignoring key '%s' with value '%s'\n", fname.c_str(), str_key.c_str(), str_val.c_str());
-
-                    }
-                    str_key = "";
-                    str_val = "";
-                    in_token = false;
-                    continue;
-                }
-                if (has_key == false) {
-                    str_key += json[i];
-                } else {
-                    str_val += json[i];
-                }
-            }
-        }
-    }
-
-    return result;
-}
-
-std::string convert_to_utf8(const std::wstring & input) {
-    std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
-    return converter.to_bytes(input);
-}
-
-
-std::wstring convert_to_wstring(const std::string & input) {
-    std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
-    return converter.from_bytes(input);
-}
-
-void gpt_split_words(std::string str, std::vector<std::string>& words) {
-    const std::string pattern = R"('s|'t|'re|'ve|'m|'ll|'d| ?[[:alpha:]]+| ?[[:digit:]]+| ?[^\s[:alpha:][:digit:]]+|\s+(?!\S)|\s+)";
-    const std::regex re(pattern);
-    std::smatch m;
-
-    while (std::regex_search(str, m, re)) {
-        for (auto x : m) {
-            words.push_back(x);
-        }
-        str = m.suffix();
-    }
-}
-
-std::vector<gpt_vocab::id> gpt_tokenize(const gpt_vocab & vocab, const std::string & text) {
-    std::vector<std::string> words;
-
-    // first split the text into words
-    {
-        std::string str = text;
-
-        // Generate the subpattern from the special_tokens vector if it's not empty
-        if (!vocab.special_tokens.empty()) {
-            const std::regex escape(R"([\[\\\^\$\.\|\?\*\+\(\)\{\}])");
-            std::string special_tokens_subpattern;
-            for (const auto & token : vocab.special_tokens) {
-                if (!special_tokens_subpattern.empty()) {
-                    special_tokens_subpattern += "|";
-                }
-                special_tokens_subpattern += std::regex_replace(token, escape, R"(\$&)");
-            }
-
-            std::regex re(special_tokens_subpattern);
-            std::smatch m;
-            // Split the text by special tokens.
-            while (std::regex_search(str, m, re)) {
-                // Split the substrings in-between special tokens into words.
-                gpt_split_words(m.prefix(), words);
-                // Add matched special tokens as words.
-                for (auto x : m) {
-                    words.push_back(x);
-                }
-                str = m.suffix();
-            }
-            // Remaining text without special tokens will be handled below.
-        }
-
-        gpt_split_words(str, words);
-    }
-
-    // find the longest token that forms each word in words:
-    std::vector<gpt_vocab::id> tokens;
-    for (const auto & word : words) {
-        for (int i = 0; i < (int) word.size(); ){
-            for (int j = word.size() - 1; j >= i; j--){
-                auto cand = word.substr(i, j-i+1);
-                auto it = vocab.token_to_id.find(cand);
-                if (it != vocab.token_to_id.end()){ // word.substr(i, j-i+1) in vocab
-                    tokens.push_back(it->second);
-                    i = j + 1;
-                    break;
-                }
-                else if (j == i){ // word.substr(i, 1) has no matching
-                    fprintf(stderr, "%s: unknown token '%s'\n", __func__, word.substr(i, 1).data());
-                    i++;
-                }
-            }
-        }
-    }
-
-    return tokens;
-}
-
-static std::vector<gpt_vocab::id> parse_tokens_from_string(const std::string& input, char delimiter) {
-    std::vector<gpt_vocab::id> output;
-    std::stringstream ss(input);
-    std::string token;
-
-    while (std::getline(ss, token, delimiter)) {
-        output.push_back(std::stoi(token));
-    }
-
-    return output;
-}
-
-static std::map<std::string, std::vector<gpt_vocab::id>> extract_tests_from_file(const std::string & fpath_test){
-    if (fpath_test.empty()){
-        fprintf(stderr, "%s : No test file found.\n", __func__);
-        return std::map<std::string, std::vector<gpt_vocab::id>>();
-    }
-
-    std::map<std::string, std::vector<gpt_vocab::id>> tests;
-
-    auto fin = std::ifstream(fpath_test, std::ios_base::in);
-    const char * delimeter = " => ";
-    const char del_tok = ',';
-    std::string line;
-    while (std::getline(fin, line)) {
-        size_t delimiterPos = line.find(delimeter);
-        if (delimiterPos != std::string::npos) {
-            std::string text = line.substr(0, delimiterPos);
-            std::string s_tokens = line.substr(delimiterPos + std::strlen(delimeter));
-            tests[text] = parse_tokens_from_string(s_tokens, del_tok);
-        }
-    }
-    return tests;
-}
-
-void test_gpt_tokenizer(gpt_vocab & vocab, const std::string & fpath_test){
-    std::map<std::string, std::vector<gpt_vocab::id>> tests = extract_tests_from_file(fpath_test);
-
-    size_t n_fails = 0;
-
-    for (const auto & test : tests) {
-        std::vector<gpt_vocab::id> tokens = gpt_tokenize(vocab, test.first);
-
-        if (tokens != test.second){
-            n_fails++;
-
-            // print out failure cases
-            fprintf(stderr, "%s : failed test: '%s'\n", __func__, test.first.c_str());
-            fprintf(stderr, "%s : tokens in hf:   ", __func__);
-            for (const auto & t : test.second) {
-                fprintf(stderr, "%s(%d), ", vocab.id_to_token[t].c_str(), t);
-            }
-            fprintf(stderr, "\n");
-            fprintf(stderr, "%s : tokens in ggml: ", __func__);
-            for (const auto & t : tokens) {
-                fprintf(stderr, "%s(%d), ", vocab.id_to_token[t].c_str(), t);
-            }
-            fprintf(stderr, "\n");
-        }
-    }
-
-    fprintf(stderr, "%s : %zu tests failed out of %zu tests.\n", __func__, n_fails, tests.size());
-}
-
-bool gpt_vocab_init(const std::string & fname, gpt_vocab & vocab) {
-    printf("%s: loading vocab from '%s'\n", __func__, fname.c_str());
-
-    vocab.token_to_id = ::json_parse(fname);
-
-    for (const auto & kv : vocab.token_to_id) {
-        vocab.id_to_token[kv.second] = kv.first;
-    }
-
-    printf("%s: vocab size = %d\n", __func__, (int) vocab.token_to_id.size());
-
-    // print the vocabulary
-    //for (auto kv : vocab.token_to_id) {
-    //    printf("'%s' -> %d\n", kv.first.data(), kv.second);
-    //}
-
-    return true;
-}
-
-gpt_vocab::id gpt_sample_top_k_top_p(
-        const gpt_vocab & vocab,
-        const float * logits,
-        int    top_k,
-        double top_p,
-        double temp,
-        std::mt19937 & rng) {
-    int n_logits = vocab.id_to_token.size();
-
-    std::vector<std::pair<double, gpt_vocab::id>> logits_id;
-    logits_id.reserve(n_logits);
-
-    {
-        const double scale = 1.0/temp;
-        for (int i = 0; i < n_logits; ++i) {
-            logits_id.push_back(std::make_pair(logits[i]*scale, i));
-        }
-    }
-
-    // find the top K tokens
-    std::partial_sort(
-            logits_id.begin(),
-            logits_id.begin() + top_k, logits_id.end(),
-            [](const std::pair<double, gpt_vocab::id> & a, const std::pair<double, gpt_vocab::id> & b) {
-        return a.first > b.first;
-    });
-
-    logits_id.resize(top_k);
-
-    double maxl = -INFINITY;
-    for (const auto & kv : logits_id) {
-        maxl = std::max(maxl, kv.first);
-    }
-
-    // compute probs for the top K tokens
-    std::vector<double> probs;
-    probs.reserve(logits_id.size());
-
-    double sum = 0.0;
-    for (const auto & kv : logits_id) {
-        double p = exp(kv.first - maxl);
-        probs.push_back(p);
-        sum += p;
-    }
-
-    // normalize the probs
-    for (auto & p : probs) {
-        p /= sum;
-    }
-
-    if (top_p < 1.0f) {
-        double cumsum = 0.0f;
-        for (int i = 0; i < top_k; i++) {
-            cumsum += probs[i];
-            if (cumsum >= top_p) {
-                top_k = i + 1;
-                probs.resize(top_k);
-                logits_id.resize(top_k);
-                break;
-            }
-        }
-
-        cumsum = 1.0/cumsum;
-        for (int i = 0; i < (int) probs.size(); i++) {
-            probs[i] *= cumsum;
-        }
-    }
-
-    //printf("\n");
-    //for (int i = 0; i < (int) probs.size(); i++) {
-    //    printf("%d: '%s' %f\n", i, vocab.id_to_token.at(logits_id[i].second).c_str(), probs[i]);
-    //}
-    //exit(0);
-
-    std::discrete_distribution<> dist(probs.begin(), probs.end());
-    int idx = dist(rng);
-
-    return logits_id[idx].second;
-}
-
-gpt_vocab::id gpt_sample_top_k_top_p_repeat(
-        const gpt_vocab & vocab,
-        const float * logits,
-        const int32_t * last_n_tokens_data,
-        size_t last_n_tokens_data_size,
-        int    top_k,
-        double top_p,
-        double temp,
-        int repeat_last_n,
-        float repeat_penalty,
-        std::mt19937 & rng) {
-
-    int n_logits = vocab.id_to_token.size();
-
-    const auto * plogits = logits;
-
-    const auto last_n_tokens = std::vector<int32_t>(last_n_tokens_data, last_n_tokens_data + last_n_tokens_data_size);
-
-    if (temp <= 0) {
-        // select the token with the highest logit directly
-        float max_logit = plogits[0];
-        gpt_vocab::id max_id = 0;
-
-        for (int i = 1; i < n_logits; ++i) {
-            if (plogits[i] > max_logit) {
-                max_logit = plogits[i];
-                max_id = i;
-            }
-        }
-        return max_id;
-    }
-
-
-    std::vector<std::pair<double, gpt_vocab::id>> logits_id;
-    logits_id.reserve(n_logits);
-
-    {
-        const float scale = 1.0f/temp;
-        for (int i = 0; i < n_logits; ++i) {
-            // repetition penalty from ctrl paper (https://arxiv.org/abs/1909.05858)
-            // credit https://github.com/facebookresearch/llama/compare/main...shawwn:llama:main
-            if (repeat_last_n > 0 && std::find(last_n_tokens.end()-repeat_last_n, last_n_tokens.end(), i) != last_n_tokens.end()) {
-                // if score < 0 then repetition penalty has to multiplied to reduce the previous token probability
-                if (plogits[i] < 0.0f) {
-                    logits_id.push_back(std::make_pair(plogits[i]*scale*repeat_penalty, i));
-                } else {
-                    logits_id.push_back(std::make_pair(plogits[i]*scale/repeat_penalty, i));
-                }
-            } else {
-                logits_id.push_back(std::make_pair(plogits[i]*scale, i));
-            }
-        }
-    }
-
-    // find the top K tokens
-    std::partial_sort(
-            logits_id.begin(),
-            logits_id.begin() + top_k, logits_id.end(),
-            [](const std::pair<double, gpt_vocab::id> & a, const std::pair<double, gpt_vocab::id> & b) {
-        return a.first > b.first;
-    });
-
-    logits_id.resize(top_k);
-
-    double maxl = -INFINITY;
-    for (const auto & kv : logits_id) {
-        maxl = std::max(maxl, kv.first);
-    }
-
-    // compute probs for the top K tokens
-    std::vector<double> probs;
-    probs.reserve(logits_id.size());
-
-    double sum = 0.0;
-    for (const auto & kv : logits_id) {
-        double p = exp(kv.first - maxl);
-        probs.push_back(p);
-        sum += p;
-    }
-
-    // normalize the probs
-    for (auto & p : probs) {
-        p /= sum;
-    }
-
-    if (top_p < 1.0f) {
-        double cumsum = 0.0f;
-        for (int i = 0; i < top_k; i++) {
-            cumsum += probs[i];
-            if (cumsum >= top_p) {
-                top_k = i + 1;
-                probs.resize(top_k);
-                logits_id.resize(top_k);
-                break;
-            }
-        }
-
-        cumsum = 1.0/cumsum;
-        for (int i = 0; i < (int) probs.size(); i++) {
-            probs[i] *= cumsum;
-        }
-    }
-
-//    printf("\n");
-//    for (int i = 0; i < (int) probs.size(); i++) {
-//    for (int i = 0; i < 10; i++) {
-//        printf("%d: '%s' %f\n", i, vocab.id_to_token.at(logits_id[i].second).c_str(), probs[i]);
-//    }
-
-    std::discrete_distribution<> dist(probs.begin(), probs.end());
-    int idx = dist(rng);
-
-    return logits_id[idx].second;
-
-}
-
-bool is_wav_buffer(const std::string buf) {
-    // RIFF ref: https://en.wikipedia.org/wiki/Resource_Interchange_File_Format
-    // WAV ref: https://www.mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html
-    if (buf.size() < 12 || buf.substr(0, 4) != "RIFF" || buf.substr(8, 4) != "WAVE") {
-        return false;
-    }
-
-    uint32_t chunk_size = *reinterpret_cast<const uint32_t*>(buf.data() + 4);
-    if (chunk_size + 8 != buf.size()) {
-        return false;
-    }
-
-    return true;
-}
-
-bool read_wav(const std::string & fname, std::vector<float>& pcmf32, std::vector<std::vector<float>>& pcmf32s, bool stereo) {
-    drwav wav;
-    std::vector<uint8_t> wav_data; // used for pipe input from stdin or ffmpeg decoding output
-
-    if (fname == "-") {
-        {
-            #ifdef _WIN32
-            _setmode(_fileno(stdin), _O_BINARY);
-            #endif
-
-            uint8_t buf[1024];
-            while (true)
-            {
-                const size_t n = fread(buf, 1, sizeof(buf), stdin);
-                if (n == 0) {
-                    break;
-                }
-                wav_data.insert(wav_data.end(), buf, buf + n);
-            }
-        }
-
-        if (drwav_init_memory(&wav, wav_data.data(), wav_data.size(), nullptr) == false) {
-            fprintf(stderr, "error: failed to open WAV file from stdin\n");
-            return false;
-        }
-
-        fprintf(stderr, "%s: read %zu bytes from stdin\n", __func__, wav_data.size());
-    }
-    else if (is_wav_buffer(fname)) {
-        if (drwav_init_memory(&wav, fname.c_str(), fname.size(), nullptr) == false) {
-            fprintf(stderr, "error: failed to open WAV file from fname buffer\n");
-            return false;
-        }
-    }
-    else if (drwav_init_file(&wav, fname.c_str(), nullptr) == false) {
-#if defined(WHISPER_FFMPEG)
-        if (ffmpeg_decode_audio(fname, wav_data) != 0) {
-            fprintf(stderr, "error: failed to ffmpeg decode '%s' \n", fname.c_str());
-            return false;
-        }
-        if (drwav_init_memory(&wav, wav_data.data(), wav_data.size(), nullptr) == false) {
-            fprintf(stderr, "error: failed to read wav data as wav \n");
-            return false;
-        }
-#else
-        fprintf(stderr, "error: failed to open '%s' as WAV file\n", fname.c_str());
-        return false;
-#endif
-    }
-
-    if (wav.channels != 1 && wav.channels != 2) {
-        fprintf(stderr, "%s: WAV file '%s' must be mono or stereo\n", __func__, fname.c_str());
-        drwav_uninit(&wav);
-        return false;
-    }
-
-    if (stereo && wav.channels != 2) {
-        fprintf(stderr, "%s: WAV file '%s' must be stereo for diarization\n", __func__, fname.c_str());
-        drwav_uninit(&wav);
-        return false;
-    }
-
-    if (wav.sampleRate != COMMON_SAMPLE_RATE) {
-        fprintf(stderr, "%s: WAV file '%s' must be %i kHz\n", __func__, fname.c_str(), COMMON_SAMPLE_RATE/1000);
-        drwav_uninit(&wav);
-        return false;
-    }
-
-    if (wav.bitsPerSample != 16) {
-        fprintf(stderr, "%s: WAV file '%s' must be 16-bit\n", __func__, fname.c_str());
-        drwav_uninit(&wav);
-        return false;
-    }
-
-    const uint64_t n = wav_data.empty() ? wav.totalPCMFrameCount : wav_data.size()/(wav.channels*wav.bitsPerSample/8);
-
-    std::vector<int16_t> pcm16;
-    pcm16.resize(n*wav.channels);
-    drwav_read_pcm_frames_s16(&wav, n, pcm16.data());
-    drwav_uninit(&wav);
-
-    // convert to mono, float
-    pcmf32.resize(n);
-    if (wav.channels == 1) {
-        for (uint64_t i = 0; i < n; i++) {
-            pcmf32[i] = float(pcm16[i])/32768.0f;
-        }
-    } else {
-        for (uint64_t i = 0; i < n; i++) {
-            pcmf32[i] = float(pcm16[2*i] + pcm16[2*i + 1])/65536.0f;
-        }
-    }
-
-    if (stereo) {
-        // convert to stereo, float
-        pcmf32s.resize(2);
-
-        pcmf32s[0].resize(n);
-        pcmf32s[1].resize(n);
-        for (uint64_t i = 0; i < n; i++) {
-            pcmf32s[0][i] = float(pcm16[2*i])/32768.0f;
-            pcmf32s[1][i] = float(pcm16[2*i + 1])/32768.0f;
-        }
-    }
-
-    return true;
-}
-
-void high_pass_filter(std::vector<float> & data, float cutoff, float sample_rate) {
-    const float rc = 1.0f / (2.0f * M_PI * cutoff);
-    const float dt = 1.0f / sample_rate;
-    const float alpha = dt / (rc + dt);
-
-    float y = data[0];
-
-    for (size_t i = 1; i < data.size(); i++) {
-        y = alpha * (y + data[i] - data[i - 1]);
-        data[i] = y;
-    }
-}
-
-bool vad_simple(std::vector<float> & pcmf32, int sample_rate, int last_ms, float vad_thold, float freq_thold, bool verbose) {
-    const int n_samples      = pcmf32.size();
-    const int n_samples_last = (sample_rate * last_ms) / 1000;
-
-    if (n_samples_last >= n_samples) {
-        // not enough samples - assume no speech
-        return false;
-    }
-
-    if (freq_thold > 0.0f) {
-        high_pass_filter(pcmf32, freq_thold, sample_rate);
-    }
-
-    float energy_all  = 0.0f;
-    float energy_last = 0.0f;
-
-    for (int i = 0; i < n_samples; i++) {
-        energy_all += fabsf(pcmf32[i]);
-
-        if (i >= n_samples - n_samples_last) {
-            energy_last += fabsf(pcmf32[i]);
-        }
-    }
-
-    energy_all  /= n_samples;
-    energy_last /= n_samples_last;
-
-    if (verbose) {
-        fprintf(stderr, "%s: energy_all: %f, energy_last: %f, vad_thold: %f, freq_thold: %f\n", __func__, energy_all, energy_last, vad_thold, freq_thold);
-    }
-
-    if (energy_last > vad_thold*energy_all) {
-        return false;
-    }
-
-    return true;
-}
-
-float similarity(const std::string & s0, const std::string & s1) {
-    const size_t len0 = s0.size() + 1;
-    const size_t len1 = s1.size() + 1;
-
-    std::vector<int> col(len1, 0);
-    std::vector<int> prevCol(len1, 0);
-
-    for (size_t i = 0; i < len1; i++) {
-        prevCol[i] = i;
-    }
-
-    for (size_t i = 0; i < len0; i++) {
-        col[0] = i;
-        for (size_t j = 1; j < len1; j++) {
-            col[j] = std::min(std::min(1 + col[j - 1], 1 + prevCol[j]), prevCol[j - 1] + (i > 0 && s0[i - 1] == s1[j - 1] ? 0 : 1));
-        }
-        col.swap(prevCol);
-    }
-
-    const float dist = prevCol[len1 - 1];
-
-    return 1.0f - (dist / std::max(s0.size(), s1.size()));
-}
-
-bool sam_params_parse(int argc, char ** argv, sam_params & params) {
-    for (int i = 1; i < argc; i++) {
-        std::string arg = argv[i];
-
-        if (arg == "-s" || arg == "--seed") {
-            params.seed = std::stoi(argv[++i]);
-        } else if (arg == "-t" || arg == "--threads") {
-            params.n_threads = std::stoi(argv[++i]);
-        } else if (arg == "-m" || arg == "--model") {
-            params.model = argv[++i];
-        } else if (arg == "-i" || arg == "--inp") {
-            params.fname_inp = argv[++i];
-        } else if (arg == "-o" || arg == "--out") {
-            params.fname_out = argv[++i];
-        } else if (arg == "-h" || arg == "--help") {
-            sam_print_usage(argc, argv, params);
-            exit(0);
-        } else {
-            fprintf(stderr, "error: unknown argument: %s\n", arg.c_str());
-            sam_print_usage(argc, argv, params);
-            exit(0);
-        }
-    }
-
-    return true;
-}
-
-void sam_print_usage(int /*argc*/, char ** argv, const sam_params & params) {
-    fprintf(stderr, "usage: %s [options]\n", argv[0]);
-    fprintf(stderr, "\n");
-    fprintf(stderr, "options:\n");
-    fprintf(stderr, "  -h, --help            show this help message and exit\n");
-    fprintf(stderr, "  -s SEED, --seed SEED  RNG seed (default: -1)\n");
-    fprintf(stderr, "  -t N, --threads N     number of threads to use during computation (default: %d)\n", params.n_threads);
-    fprintf(stderr, "  -m FNAME, --model FNAME\n");
-    fprintf(stderr, "                        model path (default: %s)\n", params.model.c_str());
-    fprintf(stderr, "  -i FNAME, --inp FNAME\n");
-    fprintf(stderr, "                        input file (default: %s)\n", params.fname_inp.c_str());
-    fprintf(stderr, "  -o FNAME, --out FNAME\n");
-    fprintf(stderr, "                        output file (default: %s)\n", params.fname_out.c_str());
-    fprintf(stderr, "\n");
-}
-
-//  500 -> 00:05.000
-// 6000 -> 01:00.000
-std::string to_timestamp(int64_t t, bool comma) {
-    int64_t msec = t * 10;
-    int64_t hr = msec / (1000 * 60 * 60);
-    msec = msec - hr * (1000 * 60 * 60);
-    int64_t min = msec / (1000 * 60);
-    msec = msec - min * (1000 * 60);
-    int64_t sec = msec / 1000;
-    msec = msec - sec * 1000;
-
-    char buf[32];
-    snprintf(buf, sizeof(buf), "%02d:%02d:%02d%s%03d", (int) hr, (int) min, (int) sec, comma ? "," : ".", (int) msec);
-
-    return std::string(buf);
-}
-
-int timestamp_to_sample(int64_t t, int n_samples, int whisper_sample_rate) {
-    return std::max(0, std::min((int) n_samples - 1, (int) ((t*whisper_sample_rate)/100)));
-}
-
-bool is_file_exist(const char *fileName)
-{
-    std::ifstream infile(fileName);
-    return infile.good();
-}
-
-bool speak_with_file(const std::string & command, const std::string & text, const std::string & path, int voice_id)
-{
-    std::ofstream speak_file(path.c_str());
-    if (speak_file.fail()) {
-        fprintf(stderr, "%s: failed to open speak_file\n", __func__);
-        return false;
-    } else {
-        speak_file.write(text.c_str(), text.size());
-        speak_file.close();
-        int ret = system((command + " " + std::to_string(voice_id) + " " + path).c_str());
-        if (ret != 0) {
-            fprintf(stderr, "%s: failed to speak\n", __func__);
-            return false;
-        }
-    }
-    return true;
-}