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75 lines
2.1 KiB
75 lines
2.1 KiB
#include "encoder_acquistion.h"
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#include "config.h"
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#include "stdlib.h"
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#include "zassert.h"
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#include "zboard.h"
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#include "zthread.h"
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#define REPORT_BUF_SIZE 1000
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#define TAG "aencoder_acquistion_driver"
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static zthread_t s_workingthread;
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uint8_t *s_reportbuf;
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uint32_t s_reportbufsize;
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encoder_acquisition_cb_t s_cb;
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/**
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* @brief 在这里上报语音
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*
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* @param arg
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*
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* PS:
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* 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
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*/
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static void prv_workingthread(void *arg) {
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while (!zthread_is_expect_stop(&s_workingthread)) {
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size_t bytes_read;
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// ESP_LOGI(TAG, "read %d ", bytes_read);
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if (s_cb) {
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#if 0
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//测试放大方法效率
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uint32_t sticket = xTaskGetTickCount();
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for(unsigned i = 0; i < 16*4; ++i) {
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amf_voice(s_reportbuf, bytes_read);
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}
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uint32_t endticket = xTaskGetTickCount();
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ESP_LOGI(TAG, " %d use %d", bytes_read,endticket - sticket);
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#else
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// amf_voice(s_reportbuf, bytes_read);
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#endif
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// 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,
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// 又因为PCM1808位宽为24bit,32位中低八位为零,已经默认放大
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// 则可以保证数据放大3.3/0.316后数据是无损的.
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for (size_t i = 0; i < bytes_read; i += 4) {
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int32_t *rxdata = (int32_t *)&s_reportbuf[i];
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(*rxdata) = (*rxdata) * 3.3 / 0.316;
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}
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// 对音频按照配置进行放大
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for (size_t i = 0; i < bytes_read; i += 4) {
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int32_t *rxdata = (int32_t *)&s_reportbuf[i];
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}
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s_cb(s_reportbuf, bytes_read);
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}
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}
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}
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void encoder_acquisition_init(encoder_acquisition_cb_t cb) {
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// s_workingthread
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// s_workingthread
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s_reportbuf = malloc(REPORT_BUF_SIZE);
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s_reportbufsize = REPORT_BUF_SIZE;
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s_cb = cb;
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Z_ASSERT(s_reportbuf);
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Z_ASSERT(s_reportbufsize);
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Z_ASSERT(s_cb);
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zthread_init(&s_workingthread, "encoder_acquistion_driver", prv_workingthread);
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}
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void encoder_acquisition_start_cauture() { zthread_start(&s_workingthread); }
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void encoder_acquisition_stop_cauture() { zthread_stop(&s_workingthread); }
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