讯飞语音识别

/*
@file
@brief 基于录音接口和讯飞MSC接口封装一个MIC录音识别的模块

@author taozhang9
@date 2016/05/27
*/

enum sr_audsrc
{
SR_MIC, /* write data from mic */
SR_USER /* write data from user by calling API */
};

#define DEFAULT_INPUT_DEVID     (-1)

#define E_SR_NOACTIVEDEVICE 1
#define E_SR_NOMEM 2
#define E_SR_INVAL 3
#define E_SR_RECORDFAIL 4
#define E_SR_ALREADY 5

struct speech_rec_notifier {
void (*on_result)(const char *result, char is_last);
void (*on_speech_begin)();
void (*on_speech_end)(int reason); /* 0 if VAD.  others, error : see E_SR_xxx and msp_errors.h  */
};

#define END_REASON_VAD_DETECT 0 /* detected speech done  */

struct speech_rec {
enum sr_audsrc aud_src;  /* from mic or manual  stream write */
struct speech_rec_notifier notif;
const char * session_id;
int ep_stat;
int rec_stat;
int audio_status;
struct recorder *recorder;
volatile int state;
char * session_begin_params;
};

#ifdef __cplusplus
extern "C" {
#endif

/* must init before start . devid = -1, then the default device will be used.
devid will be ignored if the aud_src is not SR_MIC */
int sr_init(struct speech_rec * sr, const char * session_begin_params, enum sr_audsrc aud_src, int devid, struct speech_rec_notifier * notifier);
int sr_start_listening(struct speech_rec *sr);
int sr_stop_listening(struct speech_rec *sr);
/* only used for the manual write way. */
int sr_write_audio_data(struct speech_rec *sr, char *data, unsigned int len);
/* must call uninit after you don't use it */
void sr_uninit(struct speech_rec * sr);

#ifdef __cplusplus
} /* extern "C" */
#endif /* C */