Linux yuv420p转yuyv

旧城等待， 2022-01-30 15:27 251阅读 0赞

#include <stdio.h>
    #include <stdlib.h>
    #include <stdint.h>
    #include <stdbool.h>
    #include <string.h>
    #include <sys/time.h>
    
    uint32_t width = 640;
    uint32_t height = 480;
    uint8_t* outbuf=NULL;
    uint8_t* inbuf=NULL;
    uint32_t getcurrenttime()
    {
      struct timeval t;
      gettimeofday(&t, NULL);
      return (uint32_t)(t.tv_sec * 1000 + t.tv_usec / 1000);
    }
    
    int convert(uint8_t *inbuf, const uint32_t buflen, uint8_t *outbuf)
    {
      uint8_t *y = NULL;
      uint8_t *u = NULL;
      uint8_t *v = NULL;
      y = outbuf;
      u = y + 640 * 480;
      v = u + 640 * 480 / 2;
    
      uint32_t i = 0;
      uint8_t swith = 0;
      while (i < buflen) {
        if (swith == 0 || swith == 2) {
          *y++ = inbuf[i];
          swith++;
        } else if (swith == 1) {
          *u++ = inbuf[i];
          swith++;
        } else if (swith == 3) {
          *v++ = inbuf[i];
          swith = 0;
        }
        i++;
      }
      return 0;
    }
    
    void yuyv2yuv420(uint8_t *inbuf, const uint32_t buflen, uint8_t *outbuf)
    {
      uint8_t *y = NULL;
      uint8_t *u = NULL;
      uint8_t *v = NULL;
      int u_c = 0;
      int v_c = 0;
      y = outbuf;
      u = y + 640 * 480;
      v = u + 640 * 480 / 4;
      bool swith = true;
      uint32_t i = 0, j = 0;
    
      for (i = 0; i < buflen; i += 2) {
        *y++ = inbuf[i];
      }
      
      for (i = 0; i < height; i += 2) {
        for (j = 1; j < width << 1; j += 2) {
          if (swith) {
            *u++ = ((uint8_t *)(inbuf + (i * width << 1)))[j];
            swith = false;
            u_c++;
          } else {
            *v++ = ((uint8_t *)(inbuf + (i * width << 1)))[j];
            swith = true;
            v_c++;
          }
        }
      }
    }
    
    int initLut()
    {
      int ret = 0;
      uint32_t inframesize = width * height * 2; 
      uint32_t outframesize = width * height * 3 / 2;
      printf("inframesize: %u\n", inframesize);
      printf("outframesize: %u\n", outframesize);
      printf("size: %u\n", width * height / 4);
      FILE *infb = NULL;
      FILE *outfb = NULL;
      uint8_t *inbuf = NULL;
      uint8_t *outbuf = NULL; 
      
      inbuf = (uint8_t *)malloc(sizeof(uint8_t) * inframesize);
      if (inbuf == NULL) {
        printf("malloc inbuf failed\n");
        ret = -1;
        return 0;
      }
      outbuf = (uint8_t *)malloc(sizeof(uint8_t) * outframesize);
      if (outbuf == NULL) {
        printf("malloc outbuf failed\n");
        ret = -1;
        return 0;
      }
    
    }
    int  freeLut()
    {
    
      if (inbuf != NULL) free(inbuf);
      if (outbuf != NULL) free(outbuf);
      return 0;
    }