command : refactor to split command list & general transcription modes (#331)

This makes it easier to understand if you're looking for only one of the capabilities.

examples/command/command.cpp

@@ -510,351 +510,390 @@ std::vector<std::string> read_allowed_commands(const std::string & fname) {
     return allowed_commands;
 }
 
-int main(int argc, char ** argv) {
-    whisper_params params;
+// command-list mode
+// guide the transcription to match the most likely command from a provided list
+int process_command_list(struct whisper_context * ctx, audio_async &audio, const whisper_params &params) {
+   fprintf(stderr, "\n");
+   fprintf(stderr, "%s: guided mode\n", __func__);
+
+   std::vector<std::string> allowed_commands = read_allowed_commands(params.commands);
+
+   if (allowed_commands.empty()) {
+      fprintf(stderr, "%s: error: failed to read allowed commands from '%s'\n", __func__, params.commands.c_str());
+      return 2;
+   }
+
+   int max_len = 0;
+
+   std::vector<std::vector<whisper_token>> allowed_tokens;
+
+   for (const auto & cmd : allowed_commands) {
+      whisper_token tokens[1024];
+      allowed_tokens.emplace_back();
+
+      for (int l = 0; l < (int) cmd.size(); ++l) {
+         // NOTE: very important to add the whitespace !
+         //       the reason is that the first decoded token starts with a whitespace too!
+         std::string ss = std::string(" ") + cmd.substr(0, l + 1);
+
+         const int n = whisper_tokenize(ctx, ss.c_str(), tokens, 1024);
+         if (n < 0) {
+            fprintf(stderr, "%s: error: failed to tokenize command '%s'\n", __func__, cmd.c_str());
+            return 3;
+         }
+
+         if (n == 1) {
+            allowed_tokens.back().push_back(tokens[0]);
+         }
+      }
+
+      max_len = std::max(max_len, (int) cmd.size());
+   }
+
+   fprintf(stderr, "%s: allowed commands [ tokens ]:\n", __func__);
+   fprintf(stderr, "\n");
+   for (int i = 0; i < (int) allowed_commands.size(); ++i) {
+      fprintf(stderr, "  - \033[1m%-*s\033[0m = [", max_len, allowed_commands[i].c_str());
+      for (const auto & token : allowed_tokens[i]) {
+         fprintf(stderr, " %5d", token);
+      }
+      fprintf(stderr, " ]\n");
+   }
+
+   std::string  k_prompt = "select one from the available words: ";
+   for (int i = 0; i < (int) allowed_commands.size(); ++i) {
+      if (i > 0) {
+         k_prompt += ", ";
+      }
+      k_prompt += allowed_commands[i];
+   }
+   k_prompt += ". selected word: ";
+
+   // tokenize prompt
+   std::vector<whisper_token> k_tokens;
+   {
+      k_tokens.resize(1024);
+      const int n = whisper_tokenize(ctx, k_prompt.c_str(), k_tokens.data(), 1024);
+      if (n < 0) {
+         fprintf(stderr, "%s: error: failed to tokenize prompt '%s'\n", __func__, k_prompt.c_str());
+         return 4;
+      }
+      k_tokens.resize(n);
+   }
+
+   fprintf(stderr, "\n");
+   fprintf(stderr, "%s: prompt: '%s'\n", __func__, k_prompt.c_str());
+   fprintf(stderr, "%s: tokens: [", __func__);
+   for (const auto & token : k_tokens) {
+      fprintf(stderr, " %d", token);
+   }
+   fprintf(stderr, " ]\n");
+
+   fprintf(stderr, "\n");
+   fprintf(stderr, "%s: listening for a command ...\n", __func__);
+   fprintf(stderr, "\n");
+
+   bool is_running  = true;
+
+   std::vector<float> pcmf32_cur;
+   std::vector<float> pcmf32_prompt;
+
+   // main loop
+   while (is_running) {
+      // handle Ctrl + C
+      {
+         SDL_Event event;
+         while (SDL_PollEvent(&event)) {
+            switch (event.type) {
+               case SDL_QUIT:
+               {
+                  is_running = false;
+               } break;
+               default:
+                  break;
+            }
+         }
 
-    if (whisper_params_parse(argc, argv, params) == false) {
-        return 1;
-    }
+         if (!is_running) {
+            return 0;
+         }
+      }
 
-    if (whisper_lang_id(params.language.c_str()) == -1) {
-        fprintf(stderr, "error: unknown language '%s'\n", params.language.c_str());
-        whisper_print_usage(argc, argv, params);
-        exit(0);
-    }
+      // delay
+      std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
-    // whisper init
+      audio.get(2000, pcmf32_cur);
 
-    struct whisper_context * ctx = whisper_init(params.model.c_str());
+      if (vad_simple(pcmf32_cur, WHISPER_SAMPLE_RATE, 1000, params.vad_thold, params.freq_thold, params.print_energy)) {
+         fprintf(stdout, "%s: Speech detected! Processing ...\n", __func__);
 
-    // print some info about the processing
-    {
-        fprintf(stderr, "\n");
-        if (!whisper_is_multilingual(ctx)) {
-            if (params.language != "en" || params.translate) {
-                params.language = "en";
-                params.translate = false;
-                fprintf(stderr, "%s: WARNING: model is not multilingual, ignoring language and translation options\n", __func__);
-            }
-        }
-        fprintf(stderr, "%s: processing, %d threads, lang = %s, task = %s, timestamps = %d ...\n",
-                __func__,
-                params.n_threads,
-                params.language.c_str(),
-                params.translate ? "translate" : "transcribe",
-                params.no_timestamps ? 0 : 1);
+         const auto t_start = std::chrono::high_resolution_clock::now();
 
-        fprintf(stderr, "\n");
-    }
+         whisper_full_params wparams = whisper_full_default_params(WHISPER_SAMPLING_GREEDY);
 
-    // init audio
+         wparams.print_progress   = false;
+         wparams.print_special    = params.print_special;
+         wparams.print_realtime   = false;
+         wparams.print_timestamps = !params.no_timestamps;
+         wparams.translate        = params.translate;
+         wparams.no_context       = true;
+         wparams.single_segment   = true;
+         wparams.max_tokens       = 1;
+         wparams.language         = params.language.c_str();
+         wparams.n_threads        = params.n_threads;
 
-    audio_async audio(30*1000);
-    if (!audio.init(params.capture_id, WHISPER_SAMPLE_RATE)) {
-        fprintf(stderr, "%s: audio.init() failed!\n", __func__);
-        return 1;
-    }
+         wparams.audio_ctx        = params.audio_ctx;
+         wparams.speed_up         = params.speed_up;
 
-    audio.resume();
+         wparams.prompt_tokens    = k_tokens.data();
+         wparams.prompt_n_tokens  = k_tokens.size();
 
-    // wait for 1 second to avoid any buffered noise
-    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
-    audio.clear();
+         // run the transformer and a single decoding pass
+         if (whisper_full(ctx, wparams, pcmf32_cur.data(), pcmf32_cur.size()) != 0) {
+            fprintf(stderr, "%s: ERROR: whisper_full() failed\n", __func__);
+            break;
+         }
 
-    int max_len = 0;
+         const auto * probs = whisper_get_probs(ctx);
+         std::vector<std::pair<float, int>> probs_id;
 
-    bool is_running  = true;
-    bool have_prompt = false;
-    bool ask_prompt  = true;
+         double psum = 0.0;
+         for (int i = 0; i < (int) allowed_commands.size(); ++i) {
+            probs_id.emplace_back(probs[allowed_tokens[i][0]], i);
+            for (int j = 1; j < (int) allowed_tokens[i].size(); ++j) {
+               probs_id.back().first += probs[allowed_tokens[i][j]];
+            }
+            probs_id.back().first /= allowed_tokens[i].size();
+            psum += probs_id.back().first;
+         }
+
+         // normalize
+         for (auto & p : probs_id) {
+            p.first /= psum;
+         }
+
+         // sort descending
+         {
+            using pair_type = decltype(probs_id)::value_type;
+            std::sort(probs_id.begin(), probs_id.end(), [](const pair_type & a, const pair_type & b) {
+               return a.first > b.first;
+            });
+         }
+
+         // print the commands and the respective probabilities
+         {
+            fprintf(stdout, "\n");
+            for (const auto & cmd : probs_id) {
+               fprintf(stdout, "%s: %s%-*s%s = %f | ", __func__, "\033[1m", max_len, allowed_commands[cmd.second].c_str(), "\033[0m", cmd.first);
+               for (int token : allowed_tokens[cmd.second]) {
+                  fprintf(stdout, "'%4s' %f ", whisper_token_to_str(ctx, token), probs[token]);
+               }
+               fprintf(stdout, "\n");
+            }
+         }
 
-    float prob0 = 0.0f;
-    float prob  = 0.0f;
+         // best command
+         {
+            const auto t_end = std::chrono::high_resolution_clock::now();
 
-    std::vector<float> pcmf32_cur;
-    std::vector<float> pcmf32_prompt;
+            const float prob = probs_id[0].first;
+            const int index = probs_id[0].second;
 
-    std::vector<std::string> allowed_commands;
-    std::vector<std::vector<whisper_token>> allowed_tokens;
+            fprintf(stdout, "\n");
+            fprintf(stdout, "%s: detected command: %s%s%s | p = %f | t = %d ms\n", __func__,
+                    "\033[1m", allowed_commands[index].c_str(), "\033[0m", prob,
+                  (int) std::chrono::duration_cast<std::chrono::milliseconds>(t_end - t_start).count());
+            fprintf(stdout, "\n");
+         }
 
-    std::string k_prompt;
-    std::vector<whisper_token> k_tokens;
+         audio.clear();
+      }
+   }
 
-    if (!params.commands.empty()) {
-        fprintf(stderr, "\n");
-        fprintf(stderr, "%s: guided mode\n", __func__);
+   return 0;
+}
 
-        allowed_commands = read_allowed_commands(params.commands);
+// general-purpose mode
+// freely transcribe the voice into text
+int process_general_transcription(struct whisper_context * ctx, audio_async &audio, const whisper_params &params) {
+   bool is_running  = true;
+   bool have_prompt = false;
+   bool ask_prompt  = true;
+
+   float prob0 = 0.0f;
+   float prob  = 0.0f;
+
+   std::vector<float> pcmf32_cur;
+   std::vector<float> pcmf32_prompt;
+
+   const std::string k_prompt = "Ok Whisper, start listening for commands.";
+
+   fprintf(stderr, "\n");
+   fprintf(stderr, "%s: general-purpose mode\n", __func__);
+
+   // main loop
+   while (is_running) {
+      // handle Ctrl + C
+      {
+         SDL_Event event;
+         while (SDL_PollEvent(&event)) {
+            switch (event.type) {
+               case SDL_QUIT:
+               {
+                  is_running = false;
+               } break;
+               default:
+                  break;
+            }
+         }
 
-        if (allowed_commands.empty()) {
-            fprintf(stderr, "%s: error: failed to read allowed commands from '%s'\n", __func__, params.commands.c_str());
-            return 2;
-        }
+         if (!is_running) {
+            return 0;
+         }
+      }
 
-        for (const auto & cmd : allowed_commands) {
-            whisper_token tokens[1024];
-            allowed_tokens.emplace_back();
+      // delay
+      std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
-            for (int l = 0; l < (int) cmd.size(); ++l) {
-                // NOTE: very important to add the whitespace !
-                //       the reason is that the first decoded token starts with a whitespace too!
-                std::string ss = std::string(" ") + cmd.substr(0, l + 1);
+      if (ask_prompt) {
+         fprintf(stdout, "\n");
+         fprintf(stdout, "%s: Say the following phrase: '%s%s%s'\n", __func__, "\033[1m", k_prompt.c_str(), "\033[0m");
+         fprintf(stdout, "\n");
 
-                const int n = whisper_tokenize(ctx, ss.c_str(), tokens, 1024);
-                if (n < 0) {
-                    fprintf(stderr, "%s: error: failed to tokenize command '%s'\n", __func__, cmd.c_str());
-                    return 3;
-                }
+         ask_prompt = false;
+      }
 
-                if (n == 1) {
-                    allowed_tokens.back().push_back(tokens[0]);
-                }
-            }
+      {
+         audio.get(2000, pcmf32_cur);
 
-            max_len = std::max(max_len, (int) cmd.size());
-        }
+         if (vad_simple(pcmf32_cur, WHISPER_SAMPLE_RATE, 1000, params.vad_thold, params.freq_thold, params.print_energy)) {
+            fprintf(stdout, "%s: Speech detected! Processing ...\n", __func__);
 
-        fprintf(stderr, "%s: allowed commands [ tokens ]:\n", __func__);
-        fprintf(stderr, "\n");
-        for (int i = 0; i < (int) allowed_commands.size(); ++i) {
-            fprintf(stderr, "  - \033[1m%-*s\033[0m = [", max_len, allowed_commands[i].c_str());
-            for (const auto & token : allowed_tokens[i]) {
-                fprintf(stderr, " %5d", token);
-            }
-            fprintf(stderr, " ]\n");
-        }
+            int64_t t_ms = 0;
 
-        k_prompt = "select one from the available words: ";
-        for (int i = 0; i < (int) allowed_commands.size(); ++i) {
-            if (i > 0) {
-                k_prompt += ", ";
-            }
-            k_prompt += allowed_commands[i];
-        }
-        k_prompt += ". selected word: ";
-
-        // tokenize prompt
-        {
-            k_tokens.resize(1024);
-            const int n = whisper_tokenize(ctx, k_prompt.c_str(), k_tokens.data(), 1024);
-            if (n < 0) {
-                fprintf(stderr, "%s: error: failed to tokenize prompt '%s'\n", __func__, k_prompt.c_str());
-                return 4;
-            }
-            k_tokens.resize(n);
-        }
+            if (!have_prompt) {
+               // wait for activation phrase
+               audio.get(params.prompt_ms, pcmf32_cur);
 
-        fprintf(stderr, "\n");
-        fprintf(stderr, "%s: prompt: '%s'\n", __func__, k_prompt.c_str());
-        fprintf(stderr, "%s: tokens: [", __func__);
-        for (const auto & token : k_tokens) {
-            fprintf(stderr, " %d", token);
-        }
-        fprintf(stderr, " ]\n");
+               const auto txt = ::trim(::transcribe(ctx, params, pcmf32_cur, prob0, t_ms));
 
-        fprintf(stderr, "\n");
-        fprintf(stderr, "%s: listening for a command ...\n", __func__);
-        fprintf(stderr, "\n");
+               fprintf(stdout, "%s: Heard '%s%s%s', (t = %d ms)\n", __func__, "\033[1m", txt.c_str(), "\033[0m", (int) t_ms);
 
-    } else {
-        fprintf(stderr, "\n");
-        fprintf(stderr, "%s: general-purpose mode\n", __func__);
-
-        k_prompt = "Ok Whisper, start listening for commands.";
-    }
-
-    // main loop
-    while (is_running) {
-        // handle Ctrl + C
-        {
-            SDL_Event event;
-            while (SDL_PollEvent(&event)) {
-                switch (event.type) {
-                    case SDL_QUIT:
-                        {
-                            is_running = false;
-                        } break;
-                    default:
-                        break;
-                }
-            }
+               const float sim = similarity(txt, k_prompt);
 
-            if (!is_running) {
-                break;
-            }
-        }
+               if (txt.length() < 0.8*k_prompt.length() || txt.length() > 1.2*k_prompt.length() || sim < 0.8f) {
+                  fprintf(stdout, "%s: WARNING: prompt not recognized, try again\n", __func__);
+                  ask_prompt = true;
+               } else {
+                  fprintf(stdout, "\n");
+                  fprintf(stdout, "%s: The prompt has been recognized!\n", __func__);
+                  fprintf(stdout, "%s: Waiting for voice commands ...\n", __func__);
+                  fprintf(stdout, "\n");
 
-        // delay
-        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+                  // save the audio for the prompt
+                  pcmf32_prompt = pcmf32_cur;
+                  have_prompt = true;
+               }
+            } else {
+               // we have heard the activation phrase, now detect the commands
+               audio.get(params.command_ms, pcmf32_cur);
 
-        if (allowed_commands.empty()) {
-            // general-purpose mode
-            // freely transcribe the voice into text
+               // prepend the prompt audio
+               pcmf32_cur.insert(pcmf32_cur.begin(), pcmf32_prompt.begin(), pcmf32_prompt.end());
 
-            if (ask_prompt) {
-                fprintf(stdout, "\n");
-                fprintf(stdout, "%s: Say the following phrase: '%s%s%s'\n", __func__, "\033[1m", k_prompt.c_str(), "\033[0m");
-                fprintf(stdout, "\n");
+               const auto txt = ::trim(::transcribe(ctx, params, pcmf32_cur, prob, t_ms));
 
-                ask_prompt = false;
-            }
+               prob = 100.0f*(prob - prob0);
 
-            {
-                int64_t t_ms = 0;
+               //fprintf(stdout, "%s: heard '%s'\n", __func__, txt.c_str());
 
-                audio.get(2000, pcmf32_cur);
+               // find the prompt in the text
+               float best_sim = 0.0f;
+               size_t best_len = 0;
+               for (int n = 0.8*k_prompt.size(); n <= 1.2*k_prompt.size(); ++n) {
+                  const auto prompt = txt.substr(0, n);
 
-                if (vad_simple(pcmf32_cur, WHISPER_SAMPLE_RATE, 1000, params.vad_thold, params.freq_thold, params.print_energy)) {
-                    fprintf(stdout, "%s: Speech detected! Processing ...\n", __func__);
+                  const float sim = similarity(prompt, k_prompt);
 
-                    if (!have_prompt) {
-                        // wait for activation phrase
-                        audio.get(params.prompt_ms, pcmf32_cur);
+                  //fprintf(stderr, "%s: prompt = '%s', sim = %f\n", __func__, prompt.c_str(), sim);
 
-                        const auto txt = ::trim(::transcribe(ctx, params, pcmf32_cur, prob0, t_ms));
+                  if (sim > best_sim) {
+                     best_sim = sim;
+                     best_len = n;
+                  }
+               }
 
-                        fprintf(stdout, "%s: Heard '%s%s%s', (t = %d ms)\n", __func__, "\033[1m", txt.c_str(), "\033[0m", (int) t_ms);
+               const std::string command = ::trim(txt.substr(best_len));
 
-                        const float sim = similarity(txt, k_prompt);
+               fprintf(stdout, "%s: Command '%s%s%s', (t = %d ms)\n", __func__, "\033[1m", command.c_str(), "\033[0m", (int) t_ms);
+               fprintf(stdout, "\n");
+            }
 
-                        if (txt.length() < 0.8*k_prompt.length() || txt.length() > 1.2*k_prompt.length() || sim < 0.8f) {
-                            fprintf(stdout, "%s: WARNING: prompt not recognized, try again\n", __func__);
-                            ask_prompt = true;
-                        } else {
-                            fprintf(stdout, "\n");
-                            fprintf(stdout, "%s: The prompt has been recognized!\n", __func__);
-                            fprintf(stdout, "%s: Waiting for voice commands ...\n", __func__);
-                            fprintf(stdout, "\n");
+            audio.clear();
+         }
+      }
+   }
 
-                            // save the audio for the prompt
-                            pcmf32_prompt = pcmf32_cur;
-                            have_prompt = true;
-                        }
-                    } else {
-                        // we have heard the activation phrase, now detect the commands
-                        audio.get(params.command_ms, pcmf32_cur);
+   return 0;
+}
 
-                        // prepend the prompt audio
-                        pcmf32_cur.insert(pcmf32_cur.begin(), pcmf32_prompt.begin(), pcmf32_prompt.end());
+int main(int argc, char ** argv) {
+    whisper_params params;
 
-                        const auto txt = ::trim(::transcribe(ctx, params, pcmf32_cur, prob, t_ms));
+    if (whisper_params_parse(argc, argv, params) == false) {
+        return 1;
+    }
 
-                        prob = 100.0f*(prob - prob0);
+    if (whisper_lang_id(params.language.c_str()) == -1) {
+        fprintf(stderr, "error: unknown language '%s'\n", params.language.c_str());
+        whisper_print_usage(argc, argv, params);
+        exit(0);
+    }
 
-                        //fprintf(stdout, "%s: heard '%s'\n", __func__, txt.c_str());
+    // whisper init
 
-                        // find the prompt in the text
-                        float best_sim = 0.0f;
-                        size_t best_len = 0;
-                        for (int n = 0.8*k_prompt.size(); n <= 1.2*k_prompt.size(); ++n) {
-                            const auto prompt = txt.substr(0, n);
+    struct whisper_context * ctx = whisper_init(params.model.c_str());
 
-                            const float sim = similarity(prompt, k_prompt);
+    // print some info about the processing
+    {
+        fprintf(stderr, "\n");
+        if (!whisper_is_multilingual(ctx)) {
+            if (params.language != "en" || params.translate) {
+                params.language = "en";
+                params.translate = false;
+                fprintf(stderr, "%s: WARNING: model is not multilingual, ignoring language and translation options\n", __func__);
+            }
+        }
+        fprintf(stderr, "%s: processing, %d threads, lang = %s, task = %s, timestamps = %d ...\n",
+                __func__,
+                params.n_threads,
+                params.language.c_str(),
+                params.translate ? "translate" : "transcribe",
+                params.no_timestamps ? 0 : 1);
 
-                            //fprintf(stderr, "%s: prompt = '%s', sim = %f\n", __func__, prompt.c_str(), sim);
+        fprintf(stderr, "\n");
+    }
 
-                            if (sim > best_sim) {
-                                best_sim = sim;
-                                best_len = n;
-                            }
-                        }
+    // init audio
 
-                        const std::string command = ::trim(txt.substr(best_len));
+    audio_async audio(30*1000);
+    if (!audio.init(params.capture_id, WHISPER_SAMPLE_RATE)) {
+        fprintf(stderr, "%s: audio.init() failed!\n", __func__);
+        return 1;
+    }
 
-                        fprintf(stdout, "%s: Command '%s%s%s', (t = %d ms)\n", __func__, "\033[1m", command.c_str(), "\033[0m", (int) t_ms);
-                        fprintf(stdout, "\n");
-                    }
+    audio.resume();
 
-                    audio.clear();
-                }
-            }
-        } else {
-            // command-list mode
-            // guide the transcription to match the most likely command from a provided list
-
-            audio.get(2000, pcmf32_cur);
-
-            if (vad_simple(pcmf32_cur, WHISPER_SAMPLE_RATE, 1000, params.vad_thold, params.freq_thold, params.print_energy)) {
-                fprintf(stdout, "%s: Speech detected! Processing ...\n", __func__);
-
-                const auto t_start = std::chrono::high_resolution_clock::now();
-
-                whisper_full_params wparams = whisper_full_default_params(WHISPER_SAMPLING_GREEDY);
-
-                wparams.print_progress   = false;
-                wparams.print_special    = params.print_special;
-                wparams.print_realtime   = false;
-                wparams.print_timestamps = !params.no_timestamps;
-                wparams.translate        = params.translate;
-                wparams.no_context       = true;
-                wparams.single_segment   = true;
-                wparams.max_tokens       = 1;
-                wparams.language         = params.language.c_str();
-                wparams.n_threads        = params.n_threads;
-
-                wparams.audio_ctx        = params.audio_ctx;
-                wparams.speed_up         = params.speed_up;
-
-                wparams.prompt_tokens    = k_tokens.data();
-                wparams.prompt_n_tokens  = k_tokens.size();
-
-                // run the transformer and a single decoding pass
-                if (whisper_full(ctx, wparams, pcmf32_cur.data(), pcmf32_cur.size()) != 0) {
-                    fprintf(stderr, "%s: ERROR: whisper_full() failed\n", __func__);
-                    break;
-                }
-
-                const auto * probs = whisper_get_probs(ctx);
-                std::vector<std::pair<float, int>> probs_id;
-
-                double psum = 0.0;
-                for (int i = 0; i < (int) allowed_commands.size(); ++i) {
-                    probs_id.emplace_back(probs[allowed_tokens[i][0]], i);
-                    for (int j = 1; j < (int) allowed_tokens[i].size(); ++j) {
-                        probs_id.back().first += probs[allowed_tokens[i][j]];
-                    }
-                    probs_id.back().first /= allowed_tokens[i].size();
-                    psum += probs_id.back().first;
-                }
-
-                // normalize
-                for (auto & p : probs_id) {
-                    p.first /= psum;
-                }
-
-                // sort descending
-                {
-                    using pair_type = decltype(probs_id)::value_type;
-                    std::sort(probs_id.begin(), probs_id.end(), [](const pair_type & a, const pair_type & b) {
-                        return a.first > b.first;
-                    });
-                }
-
-                // print the commands and the respective probabilities
-                {
-                    fprintf(stdout, "\n");
-                    for (const auto & cmd : probs_id) {
-                        fprintf(stdout, "%s: %s%-*s%s = %f | ", __func__, "\033[1m", max_len, allowed_commands[cmd.second].c_str(), "\033[0m", cmd.first);
-                        for (int i = 0; i < (int) allowed_tokens[cmd.second].size(); ++i) {
-                            fprintf(stdout, "'%4s' %f ", whisper_token_to_str(ctx, allowed_tokens[cmd.second][i]), probs[allowed_tokens[cmd.second][i]]);
-                        }
-                        fprintf(stdout, "\n");
-                    }
-                }
-
-                // best command
-                {
-                    const auto t_end = std::chrono::high_resolution_clock::now();
-
-                    fprintf(stdout, "\n");
-                    fprintf(stdout, "%s: detected command: %s%s%s | p = %f | t = %d ms\n", __func__,
-                            "\033[1m", allowed_commands[probs_id[0].second].c_str(), "\033[0m", probs_id[0].first,
-                            (int) std::chrono::duration_cast<std::chrono::milliseconds>(t_end - t_start).count());
-                    fprintf(stdout, "\n");
-                }
-
-                audio.clear();
-            }
-        }
+    // wait for 1 second to avoid any buffered noise
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+    audio.clear();
+
+    int  ret_val = 0;
+
+    if (!params.commands.empty()) {
+       ret_val = process_command_list(ctx, audio, params);
+    } else {
+       ret_val = process_general_transcription(ctx, audio, params);
     }
 
     audio.pause();
@@ -862,5 +901,5 @@ int main(int argc, char ** argv) {
     whisper_print_timings(ctx);
     whisper_free(ctx);
 
-    return 0;
+    return ret_val;
 }