最简单的x264编码h.264

    ffmepg中的压缩264直接也是用的x264库，直接研究了x264 , 果然高效简单，不过还有很多概念有待研究。记录最简单的实现，直接上代码
  

#include <stdint.h>
#include "x264.h"
#include "x264_config.h"
#include <stdio.h>
int main()
{
    int width = 480;
    int height = 272;
    int fps = 25;
    size_t yuv_size = width * height *3/2;
    x264_t *encoder;
    x264_picture_t pic_in,pic_out;
    int inf,outf;
    uint8_t *yuv_buffer;

     x264_param_t     m_param;
     x264_param_default_preset(&m_param,"veryfast","zerolatency");
     m_param.i_threads = 1;
     m_param.i_width = width;
     m_param.i_height = height;
     m_param.i_fps_num = fps;
     m_param.i_bframe = 10;
     m_param.i_fps_den = 1;
     m_param.i_keyint_max = 25;
     m_param.b_intra_refresh = 1;
     m_param.b_annexb = 1;
     x264_param_apply_profile(&m_param,"high422");
     encoder = x264_encoder_open(&m_param);

    x264_encoder_parameters( encoder, &m_param );

     x264_picture_alloc(&pic_in, X264_CSP_I420, width, height);

     yuv_buffer = malloc(yuv_size);

     pic_in.img.plane[0] = yuv_buffer;
     pic_in.img.plane[1] = pic_in.img.plane[0] + width * height;
     pic_in.img.plane[2] = pic_in.img.plane[1] + width * height / 4;

    FILE* infile = fopen("ds_480x272.yuv","rb");
    FILE* outfile = fopen("out.h264","ab");
    if(!infile || !outfile)
        {
            printf("open file error\n");
            return 0;
        }
    int64_t i_pts = 0;

      x264_nal_t *nals;
      int nnal;
      while (fread(yuv_buffer, 1,yuv_size, infile) > 0) {
          pic_in.i_pts = i_pts++;
          x264_encoder_encode(encoder, &nals, &nnal, &pic_in, &pic_out);
          x264_nal_t *nal;
          for (nal = nals; nal < nals + nnal; nal++) {
             fwrite(nal->p_payload, 1,nal->i_payload,outfile);
         }
     }
    x264_encoder_close(encoder);
 close(infile);
 close(outfile);
 free(yuv_buffer);

    return 0;
}