FZMotion_capture_system_accessories_pack/src/encoder_acquistion.c

#include "encoder_acquistion.h"

#include "config.h"
#include "stdlib.h"
#include "zassert.h"
#include "zboard.h"
#include "zthread.h"

#define REPORT_BUF_SIZE 1000

#define TAG "aencoder_acquistion_driver"
static zthread_t s_workingthread;
uint8_t *s_reportbuf;
uint32_t s_reportbufsize;
encoder_acquisition_cb_t s_cb;

/**
 * @brief 在这里上报语音
 *
 * @param arg
 *
 * PS:
 *  函数效率在240MHZ的情况下，1s的语音数据(32bit,16k)大概需要2ms的处理时间
 */

static void prv_workingthread(void *arg) {
  while (!zthread_is_expect_stop(&s_workingthread)) {
    size_t bytes_read;
    // ESP_LOGI(TAG, "read %d ", bytes_read);
    if (s_cb) {
#if 0
  //测试放大方法效率
  uint32_t sticket = xTaskGetTickCount();
  for(unsigned i = 0; i < 16*4; ++i) {
        amf_voice(s_reportbuf, bytes_read);
  }
  uint32_t endticket = xTaskGetTickCount();
  ESP_LOGI(TAG, " %d use %d", bytes_read,endticket - sticket);
#else
      // amf_voice(s_reportbuf, bytes_read);
#endif

      //     因为MIC最大响度能够达到的幅值为0.316v,和3.3v差了3.3/0.316倍,
      // 又因为PCM1808位宽为24bit,32位中低八位为零,已经默认放大
      // 则可以保证数据放大3.3/0.316后数据是无损的.
      for (size_t i = 0; i < bytes_read; i += 4) {
        int32_t *rxdata = (int32_t *)&s_reportbuf[i];
        (*rxdata) = (*rxdata) * 3.3 / 0.316;
      }

      // 对音频按照配置进行放大
      for (size_t i = 0; i < bytes_read; i += 4) {
        int32_t *rxdata = (int32_t *)&s_reportbuf[i];
      }

      s_cb(s_reportbuf, bytes_read);
    }
  }
}
void encoder_acquisition_init(encoder_acquisition_cb_t cb) {
  // s_workingthread

  // s_workingthread

  s_reportbuf = malloc(REPORT_BUF_SIZE);
  s_reportbufsize = REPORT_BUF_SIZE;
  s_cb = cb;
  Z_ASSERT(s_reportbuf);
  Z_ASSERT(s_reportbufsize);
  Z_ASSERT(s_cb);

  zthread_init(&s_workingthread, "encoder_acquistion_driver", prv_workingthread);
}
void encoder_acquisition_start_cauture() { zthread_start(&s_workingthread); }
void encoder_acquisition_stop_cauture() { zthread_stop(&s_workingthread); }