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