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346 lines
13 KiB
346 lines
13 KiB
// Real-time speech recognition of input from a microphone
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//
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// A very quick-n-dirty implementation serving mainly as a proof of concept.
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#include "whisper.h"
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// third-party utilities
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// use your favorite implementations
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#define DR_WAV_IMPLEMENTATION
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#include "dr_wav.h"
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#include <SDL.h>
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#include <SDL_audio.h>
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#include <cassert>
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#include <cstdio>
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#include <string>
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#include <thread>
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#include <vector>
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// 500 -> 00:05.000
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// 6000 -> 01:00.000
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std::string to_timestamp(int64_t t) {
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int64_t sec = t/100;
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int64_t msec = t - sec*100;
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int64_t min = sec/60;
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sec = sec - min*60;
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char buf[32];
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snprintf(buf, sizeof(buf), "%02d:%02d.%03d", (int) min, (int) sec, (int) msec);
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return std::string(buf);
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}
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// command-line parameters
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struct whisper_params {
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int32_t seed = -1; // RNG seed, not used currently
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int32_t n_threads = std::min(4, (int32_t) std::thread::hardware_concurrency());
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int32_t step_ms = 3000;
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int32_t length_ms = 10000;
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bool verbose = false;
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bool translate = false;
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bool no_context = true;
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bool print_special_tokens = false;
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bool no_timestamps = true;
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std::string language = "en";
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std::string model = "models/ggml-base.en.bin";
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std::string fname_inp = "samples/jfk.wav";
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};
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void whisper_print_usage(int argc, char ** argv, const whisper_params & params);
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bool whisper_params_parse(int argc, char ** argv, whisper_params & params) {
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for (int i = 1; i < argc; i++) {
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std::string arg = argv[i];
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if (arg == "-s" || arg == "--seed") {
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params.seed = std::stoi(argv[++i]);
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} else if (arg == "-t" || arg == "--threads") {
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params.n_threads = std::stoi(argv[++i]);
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} else if (arg == "--step") {
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params.step_ms = std::stoi(argv[++i]);
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} else if (arg == "--length") {
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params.length_ms = std::stoi(argv[++i]);
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} else if (arg == "-v" || arg == "--verbose") {
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params.verbose = true;
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} else if (arg == "--translate") {
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params.translate = true;
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} else if (arg == "-kc" || arg == "--keep-context") {
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params.no_context = false;
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} else if (arg == "-l" || arg == "--language") {
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params.language = argv[++i];
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if (whisper_lang_id(params.language.c_str()) == -1) {
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fprintf(stderr, "error: unknown language '%s'\n", params.language.c_str());
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whisper_print_usage(argc, argv, params);
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exit(0);
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}
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} else if (arg == "-ps" || arg == "--print_special") {
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params.print_special_tokens = true;
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} else if (arg == "-nt" || arg == "--no_timestamps") {
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params.no_timestamps = true;
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} else if (arg == "-m" || arg == "--model") {
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params.model = argv[++i];
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} else if (arg == "-f" || arg == "--file") {
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params.fname_inp = argv[++i];
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} else if (arg == "-h" || arg == "--help") {
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whisper_print_usage(argc, argv, params);
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exit(0);
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} else {
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fprintf(stderr, "error: unknown argument: %s\n", arg.c_str());
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whisper_print_usage(argc, argv, params);
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exit(0);
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}
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}
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return true;
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}
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void whisper_print_usage(int argc, char ** argv, const whisper_params & params) {
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fprintf(stderr, "\n");
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fprintf(stderr, "usage: %s [options]\n", argv[0]);
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fprintf(stderr, "\n");
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fprintf(stderr, "options:\n");
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fprintf(stderr, " -h, --help show this help message and exit\n");
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fprintf(stderr, " -s SEED, --seed SEED RNG seed (default: -1)\n");
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fprintf(stderr, " -t N, --threads N number of threads to use during computation (default: %d)\n", params.n_threads);
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fprintf(stderr, " --step N audio step size in milliseconds (default: %d)\n", params.step_ms);
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fprintf(stderr, " --length N audio length in milliseconds (default: %d)\n", params.length_ms);
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fprintf(stderr, " -v, --verbose verbose output\n");
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fprintf(stderr, " --translate translate from source language to english\n");
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fprintf(stderr, " -kc, --keep-context keep text context from earlier audio (default: false)\n");
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fprintf(stderr, " -ps, --print_special print special tokens\n");
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fprintf(stderr, " -nt, --no_timestamps do not print timestamps\n");
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fprintf(stderr, " -l LANG, --language LANG spoken language (default: %s)\n", params.language.c_str());
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fprintf(stderr, " -m FNAME, --model FNAME model path (default: %s)\n", params.model.c_str());
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fprintf(stderr, " -f FNAME, --file FNAME input WAV file path (default: %s)\n", params.fname_inp.c_str());
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fprintf(stderr, "\n");
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}
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//
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// SDL Audio capture
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//
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SDL_AudioDeviceID g_dev_id_in = 0;
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bool audio_sdl_init(const int capture_id) {
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if (g_dev_id_in) {
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fprintf(stderr, "%s: already initialized\n", __func__);
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return false;
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}
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if (g_dev_id_in == 0) {
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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if (SDL_Init(SDL_INIT_AUDIO) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return (1);
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}
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SDL_SetHintWithPriority(SDL_HINT_AUDIO_RESAMPLING_MODE, "medium", SDL_HINT_OVERRIDE);
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{
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int nDevices = SDL_GetNumAudioDevices(SDL_TRUE);
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printf("%s: found %d capture devices:\n", __func__, nDevices);
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for (int i = 0; i < nDevices; i++) {
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printf("%s: - Capture device #%d: '%s'\n", __func__, i, SDL_GetAudioDeviceName(i, SDL_TRUE));
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}
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}
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}
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if (g_dev_id_in == 0) {
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SDL_AudioSpec capture_spec_requested;
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SDL_AudioSpec capture_spec_obtained;
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SDL_zero(capture_spec_requested);
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SDL_zero(capture_spec_obtained);
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capture_spec_requested.freq = WHISPER_SAMPLE_RATE;
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capture_spec_requested.format = AUDIO_F32;
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capture_spec_requested.channels = 1;
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capture_spec_requested.samples = 1024;
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if (capture_id >= 0) {
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printf("%s: attempt to open capture device %d : '%s' ...\n", __func__, capture_id, SDL_GetAudioDeviceName(capture_id, SDL_TRUE));
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g_dev_id_in = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(capture_id, SDL_TRUE), SDL_TRUE, &capture_spec_requested, &capture_spec_obtained, 0);
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} else {
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printf("%s: attempt to open default capture device ...\n", __func__);
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g_dev_id_in = SDL_OpenAudioDevice(nullptr, SDL_TRUE, &capture_spec_requested, &capture_spec_obtained, 0);
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}
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if (!g_dev_id_in) {
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printf("%s: couldn't open an audio device for capture: %s!\n", __func__, SDL_GetError());
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g_dev_id_in = 0;
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} else {
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printf("%s: obtained spec for input device (SDL Id = %d):\n", __func__, g_dev_id_in);
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printf("%s: - sample rate: %d\n", __func__, capture_spec_obtained.freq);
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printf("%s: - format: %d (required: %d)\n", __func__, capture_spec_obtained.format, capture_spec_requested.format);
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printf("%s: - channels: %d (required: %d)\n", __func__, capture_spec_obtained.channels, capture_spec_requested.channels);
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printf("%s: - samples per frame: %d\n", __func__, capture_spec_obtained.samples);
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}
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}
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return true;
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}
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///////////////////////////
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int main(int argc, char ** argv) {
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whisper_params params;
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if (whisper_params_parse(argc, argv, params) == false) {
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return 1;
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}
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if (params.seed < 0) {
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params.seed = time(NULL);
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}
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// init audio
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if (!audio_sdl_init(-1)) {
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fprintf(stderr, "%s: audio_sdl_init() failed!\n", __func__);
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return 1;
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}
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// whisper init
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struct whisper_context * ctx = whisper_init(params.model.c_str());
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const int n_samples = (params.step_ms/1000.0)*WHISPER_SAMPLE_RATE;
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const int n_samples_len = (params.length_ms/1000.0)*WHISPER_SAMPLE_RATE;
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const int n_samples_30s = 30*WHISPER_SAMPLE_RATE;
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std::vector<float> pcmf32(n_samples_30s, 0.0f);
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std::vector<float> pcmf32_old;
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const int n_new_line = params.length_ms / params.step_ms - 1;
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// print some info about the processing
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{
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printf("\n");
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if (!whisper_is_multilingual(ctx)) {
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if (params.language != "en" || params.translate) {
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params.language = "en";
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params.translate = false;
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printf("%s: WARNING: model is not multilingual, ignoring language and translation options\n", __func__);
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}
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}
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printf("%s: processing %d samples (step = %.1f sec / len = %.1f sec), %d threads, lang = %s, task = %s, timestamps = %d ...\n",
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__func__,
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n_samples,
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float(n_samples)/WHISPER_SAMPLE_RATE,
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float(n_samples_len)/WHISPER_SAMPLE_RATE,
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params.n_threads,
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params.language.c_str(),
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params.translate ? "translate" : "transcribe",
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params.no_timestamps ? 0 : 1);
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printf("%s: n_new_line = %d\n", __func__, n_new_line);
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printf("\n");
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}
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SDL_PauseAudioDevice(g_dev_id_in, 0);
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int n_iter = 0;
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bool is_running = true;
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// main audio loop
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while (is_running) {
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// process SDL events:
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SDL_Event event;
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_QUIT:
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is_running = false;
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break;
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default:
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break;
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}
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}
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// process new audio
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if (n_iter > 0 && SDL_GetQueuedAudioSize(g_dev_id_in) > 2*n_samples*sizeof(float)) {
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fprintf(stderr, "\n\n%s: WARNING: cannot process audio fast enough, dropping audio ...\n\n", __func__);
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SDL_ClearQueuedAudio(g_dev_id_in);
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}
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while (SDL_GetQueuedAudioSize(g_dev_id_in) < n_samples*sizeof(float)) {
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SDL_Delay(1);
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}
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const int n_samples_new = SDL_GetQueuedAudioSize(g_dev_id_in)/sizeof(float);
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// take one second from previous iteration
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//const int n_samples_take = std::min((int) pcmf32_old.size(), std::max(0, n_samples_30s/30 - n_samples_new));
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// take up to params.length_ms audio from previous iteration
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const int n_samples_take = std::min((int) pcmf32_old.size(), std::max(0, n_samples_len - n_samples_new));
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//printf("processing: take = %d, new = %d, old = %d\n", n_samples_take, n_samples_new, (int) pcmf32_old.size());
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pcmf32.resize(n_samples_new + n_samples_take);
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for (int i = 0; i < n_samples_take; i++) {
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pcmf32[i] = pcmf32_old[pcmf32_old.size() - n_samples_take + i];
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}
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SDL_DequeueAudio(g_dev_id_in, pcmf32.data() + n_samples_take, n_samples_new*sizeof(float));
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pcmf32_old = pcmf32;
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// run the inference
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{
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whisper_full_params wparams = whisper_full_default_params(WHISPER_SAMPLING_GREEDY);
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wparams.print_progress = false;
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wparams.print_special_tokens = params.print_special_tokens;
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wparams.print_realtime = false;
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wparams.print_timestamps = !params.no_timestamps;
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wparams.translate = params.translate;
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wparams.no_context = params.no_context;
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wparams.language = params.language.c_str();
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wparams.n_threads = params.n_threads;
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if (whisper_full(ctx, wparams, pcmf32.data(), pcmf32.size()) != 0) {
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fprintf(stderr, "%s: failed to process audio\n", argv[0]);
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return 6;
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}
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// print result;
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{
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printf("\33[2K\r");
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const int n_segments = whisper_full_n_segments(ctx);
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for (int i = 0; i < n_segments; ++i) {
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const char * text = whisper_full_get_segment_text(ctx, i);
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if (params.no_timestamps) {
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printf ("%s", text);
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fflush(stdout);
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} else {
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const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
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const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
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printf ("[%s --> %s] %s\n", to_timestamp(t0).c_str(), to_timestamp(t1).c_str(), text);
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}
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}
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}
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++n_iter;
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if ((n_iter % n_new_line) == 0) {
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printf("\n");
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pcmf32_old.clear();
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}
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}
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}
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whisper_print_timings(ctx);
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whisper_free(ctx);
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return 0;
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}
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