RT-Thread-【网络编程学习】百度语音识别的初步实现---二牛哥RT-Thread问答社区

【网络编程学习】百度语音识别的初步实现---二牛哥

发布于 2018-08-26 23:43:52 浏览：1411 订阅该版

* 本帖最后由 二牛哥 于 2018-8-27 07:01 编辑 *

百度语音识别的初步实现

本程序功能：
       将 “ *url_fil ” 所指向的pmc语音文件上传到百度语音服务器并在RTT Shell中显示转换后的结果。

使用方法：

1、分别将const char *p_voice_url 和 const char *url_fil 指针中填入相应的地址即可，分别是百度的url和本地语音文件的 " pathname "。 
            详情请参考：[https://ai.baidu.com/docs#/ASR-API/top](https://ai.baidu.com/docs#/ASR-API/top)
       2、将本文件添加到项目，通过编译后，在RTT Shell中输入“ wpost ”命令即可运行。

声明：

本程序参考自RTT webclient 相关程序，另外网友 "zppsky"的程序给了我一些启发。

#include <stdint.h>
#include <stdlib.h>

#include <rtthread.h>
#include "webclient.h"
#include "webclient_internal.h"

#ifdef RT_USING_FINSH
#include <finsh.h>
#endif

#ifdef RT_USING_DFS
#include <dfs_posix.h>

const char *p_voice_url = “此处填写百度语音服务器的url”
const char *url_fil = "此处填写语音文件的pathname";

//p_voice_url
//url_fil

int post_voice_file(const char* URI, const char* filename, const char* form_data)
{
    size_t length;
    char boundary[60];
    int fd = -1, rc = WEBCLIENT_OK;
    char *header = NULL, *header_ptr;
    unsigned char *buffer = NULL, *buffer_ptr;
    struct webclient_session* session = NULL;

fd = open(filename, O_RDONLY, 0);
 if (fd < 0)
 {
 rc = -WEBCLIENT_FILE_ERROR;
 goto __exit;
 }

/* get the size of file */
 length = lseek(fd, 0, SEEK_END); rt_kprintf("watch dot 1 length = %d ",length);
 lseek(fd, 0, SEEK_SET);

buffer = web_malloc(WEBCLIENT_RESPONSE_BUFSZ);
    if (buffer == NULL)
    {
        rc = -WEBCLIENT_NOMEM;
        goto __exit;
    }

session = (struct webclient_session*) web_malloc(sizeof(struct webclient_session));
    if (!session)
    {
        rc = -WEBCLIENT_NOMEM;
        goto __exit;
    }
    memset(session, 0x0, sizeof(struct webclient_session));

rc = webclient_connect(session, URI); 
 if (rc < 0)
 goto __exit;

/************************ send voice data *********************************/
 rt_kprintf("Start upload voice file to baidu tts... "); 
 
 header = (char*) web_malloc(WEBCLIENT_HEADER_BUFSZ);
 if (header == NULL)
 { 
 rc = -WEBCLIENT_NOMEM; 
 goto __exit;
 }
 header_ptr = header;

/* build boundary */
    rt_snprintf(boundary, sizeof(boundary), "----------------------------%012d",
            rt_tick_get());

/* build encapsulated mime_multipart information*/
 buffer_ptr = buffer;
 /* first boundary */
 buffer_ptr += rt_snprintf((char*) buffer_ptr,
 WEBCLIENT_RESPONSE_BUFSZ - (buffer_ptr - buffer), "--%s ", boundary);
 buffer_ptr += rt_snprintf((char*) buffer_ptr,
 WEBCLIENT_RESPONSE_BUFSZ - (buffer_ptr - buffer),
 "Content-Disposition: form-data; %s ", form_data);
 // "Content-Disposition: form-data; NULL ");
 buffer_ptr += rt_snprintf((char*) buffer_ptr,
 WEBCLIENT_RESPONSE_BUFSZ - (buffer_ptr - buffer),
 "Content-Type: application/octet-stream "); 
 /* calculate content-length */
 length += buffer_ptr - buffer;
 length += strlen(boundary) + 6; /* add the last boundary */

/* build header for upload */
 header_ptr += rt_snprintf(header_ptr,
 WEBCLIENT_HEADER_BUFSZ - (header_ptr - header),
 "Content-Length: %d ", length);
 header_ptr += rt_snprintf(header_ptr,
 WEBCLIENT_HEADER_BUFSZ - (header_ptr - header),
 "Content-Type:%s ", form_data); 
 rc = webclient_send_header(session, WEBCLIENT_POST, header, 
 header_ptr - header);
 if (rc < 0) 
 goto __exit;

/* send mime_multipart */
    webclient_write(session, buffer, buffer_ptr - buffer);

/* send file data */
 while (1)
 {
 length = read(fd, buffer, WEBCLIENT_RESPONSE_BUFSZ); 
 if (length <= 0)
 break;
 webclient_write(session, buffer, length);
 }

/* send last boundary */
 rt_snprintf((char*) buffer, WEBCLIENT_RESPONSE_BUFSZ, " --%s-- ", boundary);
 webclient_write(session, buffer, strlen(boundary) + 6);
 close(fd);

//----------------------------------------------------------
int bytes_read,index;
 
#define POST_RESP_BUFSZ 1024
#define POST_HEADER_BUFSZ 1024 
 
 rt_kprintf("webclient POST request response data : ");
 do
 {
 bytes_read = webclient_read(session, buffer, POST_RESP_BUFSZ);
 if (bytes_read <= 0)
 {
 break;
 }

for (index = 0; index < bytes_read; index++)
 {
 rt_kprintf("%c", buffer[index]);
 }
 } while (1);

rt_kprintf(" "); 
 
//---------------------------------------------------------- 
__exit:
 if (fd >= 0) close(fd);
 if (session != NULL) webclient_close(session);
 if (buffer != NULL) web_free(buffer);
 if (header != NULL) web_free(header);

return 0;
}

int wpost(void)
{

post_voice_file(p_voice_url,url_fil,"audio/pcm;rate=16000" );
    return 0;
}
MSH_CMD_EXPORT(wpost, web post voice file to baidu);

#endif

[attach]5865[/attach]

参考结果：

![50.png](https://oss-club.rt-thread.org/uploads/201808/27/064244lasnsxnmgspsfcs2.png)