streaming-zipformer-with-hr-c-api.c
5.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
// c-api-examples/streaming-zipformer-with-hr-c-api.c
//
// Copyright (c) 2025 Xiaomi Corporation
//
// This file demonstrates how to use streaming Zipformer with sherpa-onnx's C
// API.
// clang-format off
//
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
// tar xvf sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
// rm sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
//
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/hr-files/dict.tar.bz2
// tar xf dict.tar.bz2
//
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/hr-files/replace.fst
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/hr-files/test-hr.wav
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/hr-files/lexicon.txt
//
// clang-format on
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sherpa-onnx/c-api/c-api.h"
int32_t main() {
const char *wav_filename = "test-hr.wav";
const SherpaOnnxWave *wave = SherpaOnnxReadWave(wav_filename);
if (wave == NULL) {
fprintf(stderr, "Failed to read %s\n", wav_filename);
return -1;
}
// Online model config
SherpaOnnxOnlineModelConfig online_model_config;
memset(&online_model_config, 0, sizeof(online_model_config));
online_model_config.debug = 0;
online_model_config.num_threads = 1;
online_model_config.provider = "cpu";
online_model_config.tokens =
"./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt";
online_model_config.transducer.encoder =
"./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/"
"encoder-epoch-99-avg-1.int8.onnx";
// Note: We recommend not using int8.onnx for the decoder.
online_model_config.transducer.decoder =
"./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/"
"decoder-epoch-99-avg-1.onnx";
online_model_config.transducer.joiner =
"./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/"
"joiner-epoch-99-avg-1.int8.onnx";
online_model_config.tokens =
"./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt";
online_model_config.num_threads = 1;
// Recognizer config
SherpaOnnxOnlineRecognizerConfig recognizer_config;
memset(&recognizer_config, 0, sizeof(recognizer_config));
recognizer_config.decoding_method = "greedy_search";
recognizer_config.model_config = online_model_config;
recognizer_config.hr.dict_dir = "./dict";
recognizer_config.hr.lexicon = "./lexicon.txt";
// Please see
// https://colab.research.google.com/drive/1jEaS3s8FbRJIcVQJv2EQx19EM_mnuARi?usp=sharing
// for how to generate your own replace.fst
recognizer_config.hr.rule_fsts = "./replace.fst";
const SherpaOnnxOnlineRecognizer *recognizer =
SherpaOnnxCreateOnlineRecognizer(&recognizer_config);
if (recognizer == NULL) {
fprintf(stderr, "Please check your config!\n");
SherpaOnnxFreeWave(wave);
return -1;
}
const SherpaOnnxOnlineStream *stream =
SherpaOnnxCreateOnlineStream(recognizer);
const SherpaOnnxDisplay *display = SherpaOnnxCreateDisplay(50);
int32_t segment_id = 0;
// simulate streaming. You can choose an arbitrary N
#define N 3200
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);
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;
SherpaOnnxOnlineStreamAcceptWaveform(stream, wave->sample_rate,
wave->samples + start, end - start);
while (SherpaOnnxIsOnlineStreamReady(recognizer, stream)) {
SherpaOnnxDecodeOnlineStream(recognizer, stream);
}
const SherpaOnnxOnlineRecognizerResult *r =
SherpaOnnxGetOnlineStreamResult(recognizer, stream);
if (strlen(r->text)) {
SherpaOnnxPrint(display, segment_id, r->text);
}
if (SherpaOnnxOnlineStreamIsEndpoint(recognizer, stream)) {
if (strlen(r->text)) {
++segment_id;
}
SherpaOnnxOnlineStreamReset(recognizer, stream);
}
SherpaOnnxDestroyOnlineRecognizerResult(r);
}
// 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);
SherpaOnnxFreeWave(wave);
SherpaOnnxOnlineStreamInputFinished(stream);
while (SherpaOnnxIsOnlineStreamReady(recognizer, stream)) {
SherpaOnnxDecodeOnlineStream(recognizer, stream);
}
const SherpaOnnxOnlineRecognizerResult *r =
SherpaOnnxGetOnlineStreamResult(recognizer, stream);
if (strlen(r->text)) {
SherpaOnnxPrint(display, segment_id, r->text);
}
SherpaOnnxDestroyOnlineRecognizerResult(r);
SherpaOnnxDestroyDisplay(display);
SherpaOnnxDestroyOnlineStream(stream);
SherpaOnnxDestroyOnlineRecognizer(recognizer);
fprintf(stderr, "\n");
return 0;
}