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Allow more online models to load tokens file from the memory (#1352)
Co-authored-by: xiao <[email protected]>
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c-api-examples/keywords-spotter-buffered-tokens-keywords-c-api.c
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| // c-api-examples/keywords-spotter-buffered-tokens-keywords-c-api.c | ||
| // | ||
| // Copyright (c) 2024 Xiaomi Corporation | ||
| // Copyright (c) 2024 Luo Xiao | ||
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| // | ||
| // This file demonstrates how to use keywords spotter with sherpa-onnx's C | ||
| // API and with tokens and keywords loaded from buffered strings instead of from | ||
| // external files API. | ||
| // clang-format off | ||
| // | ||
| // wget https://github.com/k2-fsa/sherpa-onnx/releases/download/kws-models/sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile.tar.bz2 | ||
| // tar xvf sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile.tar.bz2 | ||
| // rm sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile.tar.bz2 | ||
| // | ||
| // clang-format on | ||
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| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
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| #include "sherpa-onnx/c-api/c-api.h" | ||
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| static size_t ReadFile(const char *filename, const char **buffer_out) { | ||
| FILE *file = fopen(filename, "r"); | ||
| if (file == NULL) { | ||
| fprintf(stderr, "Failed to open %s\n", filename); | ||
| return -1; | ||
| } | ||
| fseek(file, 0L, SEEK_END); | ||
| long size = ftell(file); | ||
| rewind(file); | ||
| *buffer_out = malloc(size); | ||
| if (*buffer_out == NULL) { | ||
| fclose(file); | ||
| fprintf(stderr, "Memory error\n"); | ||
| return -1; | ||
| } | ||
| size_t read_bytes = fread(*buffer_out, 1, size, file); | ||
| if (read_bytes != size) { | ||
| printf("Errors occured in reading the file %s\n", filename); | ||
| free((void *)*buffer_out); | ||
| *buffer_out = NULL; | ||
| fclose(file); | ||
| return -1; | ||
| } | ||
| fclose(file); | ||
| return read_bytes; | ||
| } | ||
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| int32_t main() { | ||
| const char *wav_filename = | ||
| "sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile/test_wavs/" | ||
| "6.wav"; | ||
| const char *encoder_filename = | ||
| "sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile/" | ||
| "encoder-epoch-12-avg-2-chunk-16-left-64.int8.onnx"; | ||
| const char *decoder_filename = | ||
| "sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile/" | ||
| "decoder-epoch-12-avg-2-chunk-16-left-64.onnx"; | ||
| const char *joiner_filename = | ||
| "sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile/" | ||
| "joiner-epoch-12-avg-2-chunk-16-left-64.int8.onnx"; | ||
| const char *provider = "cpu"; | ||
| const char *tokens_filename = | ||
| "sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile/tokens.txt"; | ||
| const char *keywords_filename = | ||
| "sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01-mobile/test_wavs/" | ||
| "test_keywords.txt"; | ||
| const SherpaOnnxWave *wave = SherpaOnnxReadWave(wav_filename); | ||
| if (wave == NULL) { | ||
| fprintf(stderr, "Failed to read %s\n", wav_filename); | ||
| return -1; | ||
| } | ||
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| // reading tokens and keywords to buffers | ||
| const char *tokens_buf; | ||
| size_t token_buf_size = ReadFile(tokens_filename, &tokens_buf); | ||
| if (token_buf_size < 1) { | ||
| fprintf(stderr, "Please check your tokens.txt!\n"); | ||
| free((void *)tokens_buf); | ||
| return -1; | ||
| } | ||
| const char *keywords_buf; | ||
| size_t keywords_buf_size = ReadFile(keywords_filename, &keywords_buf); | ||
| if (keywords_buf_size < 1) { | ||
| fprintf(stderr, "Please check your keywords.txt!\n"); | ||
| free((void *)keywords_buf); | ||
| return -1; | ||
| } | ||
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| // Zipformer config | ||
| SherpaOnnxOnlineTransducerModelConfig zipformer_config; | ||
| memset(&zipformer_config, 0, sizeof(zipformer_config)); | ||
| zipformer_config.encoder = encoder_filename; | ||
| zipformer_config.decoder = decoder_filename; | ||
| zipformer_config.joiner = joiner_filename; | ||
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| // Online model config | ||
| SherpaOnnxOnlineModelConfig online_model_config; | ||
| memset(&online_model_config, 0, sizeof(online_model_config)); | ||
| online_model_config.debug = 1; | ||
| online_model_config.num_threads = 1; | ||
| online_model_config.provider = provider; | ||
| online_model_config.tokens_buf = tokens_buf; | ||
| online_model_config.tokens_buf_size = token_buf_size; | ||
| online_model_config.transducer = zipformer_config; | ||
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| // Keywords-spotter config | ||
| SherpaOnnxKeywordSpotterConfig keywords_spotter_config; | ||
| memset(&keywords_spotter_config, 0, sizeof(keywords_spotter_config)); | ||
| keywords_spotter_config.max_active_paths = 4; | ||
| keywords_spotter_config.keywords_threshold = 0.1; | ||
| keywords_spotter_config.keywords_score = 3.0; | ||
| keywords_spotter_config.model_config = online_model_config; | ||
| keywords_spotter_config.keywords_buf = keywords_buf; | ||
| keywords_spotter_config.keywords_buf_size = keywords_buf_size; | ||
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| SherpaOnnxKeywordSpotter *keywords_spotter = | ||
| SherpaOnnxCreateKeywordSpotter(&keywords_spotter_config); | ||
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| free((void *)tokens_buf); | ||
| tokens_buf = NULL; | ||
| free((void *)keywords_buf); | ||
| keywords_buf = NULL; | ||
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| if (keywords_spotter == NULL) { | ||
| fprintf(stderr, "Please check your config!\n"); | ||
| SherpaOnnxFreeWave(wave); | ||
| return -1; | ||
| } | ||
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| SherpaOnnxOnlineStream *stream = | ||
| SherpaOnnxCreateKeywordStream(keywords_spotter); | ||
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| const SherpaOnnxDisplay *display = SherpaOnnxCreateDisplay(50); | ||
| int32_t segment_id = 0; | ||
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| // simulate streaming. You can choose an arbitrary N | ||
| #define N 3200 | ||
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| fprintf(stderr, "sample rate: %d, num samples: %d, duration: %.2f s\n", | ||
| wave->sample_rate, wave->num_samples, | ||
| (float)wave->num_samples / wave->sample_rate); | ||
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| int32_t k = 0; | ||
| while (k < wave->num_samples) { | ||
| int32_t start = k; | ||
| int32_t end = | ||
| (start + N > wave->num_samples) ? wave->num_samples : (start + N); | ||
| k += N; | ||
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| SherpaOnnxOnlineStreamAcceptWaveform(stream, wave->sample_rate, | ||
| wave->samples + start, end - start); | ||
| while (SherpaOnnxIsKeywordStreamReady(keywords_spotter, stream)) { | ||
| SherpaOnnxDecodeKeywordStream(keywords_spotter, stream); | ||
| } | ||
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| const SherpaOnnxKeywordResult *r = | ||
| SherpaOnnxGetKeywordResult(keywords_spotter, stream); | ||
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| if (strlen(r->keyword)) { | ||
| SherpaOnnxPrint(display, segment_id, r->keyword); | ||
| } | ||
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| SherpaOnnxDestroyKeywordResult(r); | ||
| } | ||
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| // add some tail padding | ||
| float tail_paddings[4800] = {0}; // 0.3 seconds at 16 kHz sample rate | ||
| SherpaOnnxOnlineStreamAcceptWaveform(stream, wave->sample_rate, tail_paddings, | ||
| 4800); | ||
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| SherpaOnnxFreeWave(wave); | ||
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| SherpaOnnxOnlineStreamInputFinished(stream); | ||
| while (SherpaOnnxIsKeywordStreamReady(keywords_spotter, stream)) { | ||
| SherpaOnnxDecodeKeywordStream(keywords_spotter, stream); | ||
| } | ||
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| const SherpaOnnxKeywordResult *r = | ||
| SherpaOnnxGetKeywordResult(keywords_spotter, stream); | ||
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| if (strlen(r->keyword)) { | ||
| SherpaOnnxPrint(display, segment_id, r->keyword); | ||
| } | ||
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| SherpaOnnxDestroyKeywordResult(r); | ||
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| SherpaOnnxDestroyDisplay(display); | ||
| SherpaOnnxDestroyOnlineStream(stream); | ||
| SherpaOnnxDestroyKeywordSpotter(keywords_spotter); | ||
| fprintf(stderr, "\n"); | ||
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| return 0; | ||
| } |
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