libmpcodecs/vd_libdv.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <sys/types.h>
   5 #include <unistd.h>
   6 #include <math.h>
   7
   8 #include "config.h"
   9
  10 #ifdef HAVE_LIBDV095
  11
  12 #include "img_format.h"
  13
  14 #include <libdv/dv.h>
  15 #include <libdv/dv_types.h>
  16
  17 #include "stream.h"
  18 #include "demuxer.h"
  19 #include "stheader.h"
  20
  21 #include "vd_internal.h"
  22
  23 static vd_info_t info =
  24 {
  25         "Raw DV Video Decoder",
  26         "libdv",
  27         "Alexander Neundorf <neundorf@kde.org>",
  28         "http://libdv.sf.net",
  29         "native codec"
  30 };
  31
  32 LIBVD_EXTERN(libdv)
  33
  34 // to set/get/query special features/parameters
  35 static int control(sh_video_t *sh,int cmd,void* arg,...){
  36     return CONTROL_UNKNOWN;
  37 }
  38
  39 static dv_decoder_t* global_rawdv_decoder=NULL;
  40
  41 dv_decoder_t* init_global_rawdv_decoder()
  42 {
  43  if(!global_rawdv_decoder){
  44    global_rawdv_decoder=dv_decoder_new(TRUE,TRUE,FALSE);
  45    global_rawdv_decoder->quality=DV_QUALITY_BEST;
  46    global_rawdv_decoder->prev_frame_decoded = 0;
  47  }
  48  return global_rawdv_decoder;
  49 }
  50
  51 // init driver
  52 static int init(sh_video_t *sh)
  53 {
  54    sh->context = (void *)init_global_rawdv_decoder();
  55    return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_YUY2);
  56 }
  57
  58 // uninit driver
  59 static void uninit(sh_video_t *sh){
  60 }
  61
  62 // decode a frame
  63 static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags)
  64 {
  65    mp_image_t* mpi;
  66    dv_decoder_t *decoder=sh->context;
  67
  68    if(len<=0 || (flags&3)){
  69 //      fprintf(stderr,"decode() (rawdv) SKIPPED\n");
  70       return NULL; // skipped frame
  71    }
  72
  73    dv_parse_header(decoder, data);
  74
  75    mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, sh->disp_w, sh->disp_h);
  76
  77    if(!mpi){    // temporary!
  78       fprintf(stderr,"couldn't allocate image for stderr codec\n");
  79       return NULL;
  80    }
  81
  82    dv_decode_full_frame(decoder, data, e_dv_color_yuv, mpi->planes, mpi->stride);
  83
  84    return mpi;
  85 }
  86 #endif
  87