temperature_iT18/beken_rtt_sdk_release-SDK_3.0.76/applications/opus_encoder.c

#include <rtthread.h>
#include <finsh.h>
#include "common.h"
#include "param_config.h"
#include "ble_pub.h"
#include "drv_oled.h"
#include <rtdevice.h>
#include "app_temperature.h"
#ifdef PKG_USING_EASYFLASH
#include "easyflash.h"
#endif
#include "audio_device.h"
#include "app_voice_player.h"
#include "opus.h"
#include "opus_encoder.h"
#include "audio_device.h"
// 设置常量
#define SAMPLE_RATE 16000
#define CHANNELS 1
#define FRAME_SIZE 960   // 20ms的帧大小
#define MAX_PACKET_SIZE 4000  // 最大的OPUS数据包大小

// PCM缓冲区
int16_t pcm_buffer[2048];
uint8_t encoded_data[MAX_PACKET_SIZE];  // 用于存储编码后的OPUS数据

OpusEncoder *encoder = NULL;

//static const char *TAG = "PCM_to_Opus";

// 初始化Opus编码器
int initialize_opus_encoder() {
    int error;
    encoder = opus_encoder_create(SAMPLE_RATE, CHANNELS, OPUS_APPLICATION_AUDIO, &error);
    if (error != OPUS_OK) {
        rt_kprintf( "opus_encoder_create fail: %s", opus_strerror(error));
        return -1;
    }
    return 0;
}

// 编码PCM到Opus
int encode_pcm_to_opus(int16_t *pcm_data, uint8_t *opus_data, int frame_size) {
    int encoded_size = opus_encode(encoder, pcm_data, frame_size, opus_data, MAX_PACKET_SIZE);
    if (encoded_size < 0) {
        rt_kprintf( "opus_encode fail: %s", opus_strerror(encoded_size));
        return encoded_size;
    }
    return encoded_size;
}

/* 播放一个文件*/ 
void opus_work(void *p)
{
    audio_device_init();
    audio_device_mic_open();
    audio_device_mic_set_channel(1);
    audio_device_mic_set_rate(16000);
   while(1){
         
        rt_memset(pcm_buffer , 0, FRAME_SIZE);
         /* read data from sound device */
        int  read_bytes=audio_device_mic_read(pcm_buffer, FRAME_SIZE);
        rt_kprintf("read_bytes:%d\r\n",read_bytes);

        // PCM数据编码成Opus
        int ret = encode_pcm_to_opus(pcm_buffer, encoded_data, FRAME_SIZE/2);
        // 将编码后的OPUS数据写入文件
        //fwrite(encoded_data, sizeof(uint8_t), MAX_PACKET_SIZE, opus_file);
        rt_kprintf( "encode_pcm_to_opus : %d", ret);

   }
}

void opous_encoder_start(){
    rt_thread_t thread = RT_NULL;
    thread = rt_thread_create("opus_work", opus_work, RT_NULL, 1024 *8, 10, 5);
    if(thread != RT_NULL)
    {
      rt_thread_startup(thread);
    }
}