quicktime/mdia.c

   1 #include "funcprotos.h"
   2 #include "quicktime.h"
   3
   4
   5 void quicktime_mdia_init(quicktime_mdia_t *mdia)
   6 {
   7         quicktime_mdhd_init(&(mdia->mdhd));
   8         quicktime_hdlr_init(&(mdia->hdlr));
   9         quicktime_minf_init(&(mdia->minf));
  10 }
  11
  12 void quicktime_mdia_init_video(quicktime_t *file,
  13                                                                 quicktime_mdia_t *mdia,
  14                                                                 int frame_w,
  15                                                                 int frame_h,
  16                                                                 float frame_rate,
  17                                                                 char *compressor)
  18 {
  19 //printf("quicktime_mdia_init_video 1\n");
  20         quicktime_mdhd_init_video(file, &(mdia->mdhd), frame_w, frame_h, frame_rate);
  21 //printf("quicktime_mdia_init_video 1 %d %f\n", mdia->mdhd.time_scale, frame_rate);
  22         quicktime_minf_init_video(file, &(mdia->minf), frame_w, frame_h, mdia->mdhd.time_scale, frame_rate, compressor);
  23 //printf("quicktime_mdia_init_video 1\n");
  24         quicktime_hdlr_init_video(&(mdia->hdlr));
  25 //printf("quicktime_mdia_init_video 2\n");
  26 }
  27
  28 void quicktime_mdia_init_audio(quicktime_t *file,
  29                                                         quicktime_mdia_t *mdia,
  30                                                         int channels,
  31                                                         int sample_rate,
  32                                                         int bits,
  33                                                         char *compressor)
  34 {
  35         quicktime_mdhd_init_audio(&(mdia->mdhd),
  36                 sample_rate);
  37         quicktime_minf_init_audio(file,
  38                 &(mdia->minf),
  39                 channels,
  40                 sample_rate,
  41                 bits,
  42                 compressor);
  43         quicktime_hdlr_init_audio(&(mdia->hdlr));
  44 }
  45
  46 void quicktime_mdia_delete(quicktime_mdia_t *mdia)
  47 {
  48         quicktime_mdhd_delete(&(mdia->mdhd));
  49         quicktime_hdlr_delete(&(mdia->hdlr));
  50         quicktime_minf_delete(&(mdia->minf));
  51 }
  52
  53 void quicktime_mdia_dump(quicktime_mdia_t *mdia)
  54 {
  55         printf("  media\n");
  56         quicktime_mdhd_dump(&(mdia->mdhd));
  57         quicktime_hdlr_dump(&(mdia->hdlr));
  58         quicktime_minf_dump(&(mdia->minf));
  59 }
  60
  61 int quicktime_read_mdia(quicktime_t *file, quicktime_mdia_t *mdia, quicktime_atom_t *trak_atom)
  62 {
  63         quicktime_atom_t leaf_atom;
  64
  65         do
  66         {
  67                 quicktime_atom_read_header(file, &leaf_atom);
  68 //printf("quicktime_read_mdia %llx\n", quicktime_position(file));
  69
  70 /* mandatory */
  71                 if(quicktime_atom_is(&leaf_atom, "mdhd"))
  72                         { quicktime_read_mdhd(file, &(mdia->mdhd)); }
  73                 else
  74                 if(quicktime_atom_is(&leaf_atom, "hdlr"))
  75                 {
  76                         quicktime_read_hdlr(file, &(mdia->hdlr));
  77 /* Main Actor doesn't write component name */
  78                         quicktime_atom_skip(file, &leaf_atom);
  79                 }
  80                 else
  81                 if(quicktime_atom_is(&leaf_atom, "minf"))
  82                         { quicktime_read_minf(file, &(mdia->minf), &leaf_atom); }
  83                 else
  84                         quicktime_atom_skip(file, &leaf_atom);
  85         }while(quicktime_position(file) < trak_atom->end);
  86
  87         return 0;
  88 }
  89
  90 void quicktime_write_mdia(quicktime_t *file, quicktime_mdia_t *mdia)
  91 {
  92         quicktime_atom_t atom;
  93         quicktime_atom_write_header(file, &atom, "mdia");
  94
  95         quicktime_write_mdhd(file, &(mdia->mdhd));
  96         quicktime_write_hdlr(file, &(mdia->hdlr));
  97         quicktime_write_minf(file, &(mdia->minf));
  98
  99         quicktime_atom_write_footer(file, &atom);
 100 }