quicktime/yuv4toyuv.c

   1 #include "quicktime.h"
   2
   3 int usage(void)
   4 {
   5         printf("usage: yuv4toyuv <input movie> <output.yuv>\n");
   6         printf("        Write a YUV4 encoded movie as a planar YUV 4:2:0 file.\n");
   7         exit(1);
   8 }
   9
  10 int main(int argc, char *argv[])
  11 {
  12         quicktime_t *file;
  13         FILE *output;
  14         int64_t length, width, height, bytes;
  15         char *buffer_in, *y_out, *u_out, *v_out;
  16         char *y_out1, *y_out2, *u_out1, *v_out1;
  17         char *input_row;
  18         int i, j, k, l, m;
  19
  20         if(argc < 3)
  21         {
  22                 usage();
  23         }
  24
  25         if(!(file = quicktime_open(argv[1], 1, 0)))
  26         {
  27                 printf("Open input failed\n");
  28                 exit(1);
  29         }
  30
  31         if(!(output = fopen(argv[2], "wb")))
  32         {
  33                 perror("Open output failed");
  34                 exit(1);
  35         }
  36
  37         if(!quicktime_video_tracks(file))
  38         {
  39                 printf("No video tracks.\n");
  40                 exit(1);
  41         }
  42
  43         length = quicktime_video_length(file, 0);
  44         width = quicktime_video_width(file, 0);
  45         height = quicktime_video_height(file, 0);
  46         bytes = width * height + width * height / 2;
  47         buffer_in = calloc(1, bytes);
  48         y_out = calloc(1, width * height);
  49         u_out = calloc(1, width * height / 4);
  50         v_out = calloc(1, width * height / 4);
  51
  52         for(i = 0; i < length; i++)
  53         {
  54                 quicktime_set_video_position(file, i, 0);
  55                 quicktime_read_data(file, buffer_in, bytes);
  56
  57                 u_out1 = u_out;
  58                 v_out1 = v_out;
  59                 for(j = 0; j < height; j += 2)
  60                 {
  61 // Get 2 rows
  62                         input_row = &buffer_in[j * width  + j * width / 2];
  63                         y_out1 = y_out + j * width;
  64                         y_out2 = y_out1 + width;
  65
  66                         for(k = 0; k < width / 2; k++)
  67                         {
  68                                 *u_out1++ = (int)*input_row++ + 0x80;
  69                                 *v_out1++ = (int)*input_row++ + 0x80;
  70                                 *y_out1++ = *input_row++;
  71                                 *y_out1++ = *input_row++;
  72                                 *y_out2++ = *input_row++;
  73                                 *y_out2++ = *input_row++;
  74                         }
  75                 }
  76
  77                 if(!fwrite(y_out, width * height, 1, output))
  78                 {
  79                         perror("write failed");
  80                         fclose(output);
  81                         exit(1);
  82                 }
  83                 if(!fwrite(u_out, width * height / 4, 1, output))
  84                 {
  85                         perror("write failed");
  86                         fclose(output);
  87                         exit(1);
  88                 }
  89                 if(!fwrite(v_out, width * height / 4, 1, output))
  90                 {
  91                         perror("write failed");
  92                         fclose(output);
  93                         exit(1);
  94                 }
  95         }
  96
  97         quicktime_close(file);
  98 }