libmpcodecs/vd_libdv.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <sys/types.h>
  23 #include <unistd.h>
  24 #include <math.h>
  25
  26 #include "config.h"
  27
  28 #include "img_format.h"
  29
  30 #include <libdv/dv.h>
  31 #include <libdv/dv_types.h>
  32
  33 #include "stream/stream.h"
  34 #include "libmpdemux/demuxer.h"
  35 #include "libmpdemux/stheader.h"
  36
  37 #include "vd_internal.h"
  38 #include "vd_libdv.h"
  39
  40 static const vd_info_t info =
  41 {
  42         "Raw DV Video Decoder",
  43         "libdv",
  44         "Alexander Neundorf <neundorf@kde.org>",
  45         "http://libdv.sf.net",
  46         "native codec"
  47 };
  48
  49 LIBVD_EXTERN(libdv)
  50
  51 // to set/get/query special features/parameters
  52 static int control(sh_video_t *sh,int cmd,void* arg,...){
  53     return CONTROL_UNKNOWN;
  54 }
  55
  56 static dv_decoder_t* global_rawdv_decoder=NULL;
  57
  58 dv_decoder_t* init_global_rawdv_decoder(void)
  59 {
  60  if(!global_rawdv_decoder){
  61    global_rawdv_decoder=dv_decoder_new(TRUE,TRUE,FALSE);
  62    global_rawdv_decoder->quality=DV_QUALITY_BEST;
  63    global_rawdv_decoder->prev_frame_decoded = 0;
  64  }
  65  return global_rawdv_decoder;
  66 }
  67
  68 // init driver
  69 static int init(sh_video_t *sh)
  70 {
  71    sh->context = (void *)init_global_rawdv_decoder();
  72    return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_YUY2);
  73 }
  74
  75 // uninit driver
  76 static void uninit(sh_video_t *sh){
  77 }
  78
  79 // decode a frame
  80 static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags)
  81 {
  82    mp_image_t* mpi;
  83    dv_decoder_t *decoder=sh->context;
  84
  85    if(len<=0 || (flags&3)){
  86 //      fprintf(stderr,"decode() (rawdv) SKIPPED\n");
  87       return NULL; // skipped frame
  88    }
  89
  90    dv_parse_header(decoder, data);
  91
  92    mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, sh->disp_w, sh->disp_h);
  93
  94    if(!mpi){    // temporary!
  95       fprintf(stderr,"couldn't allocate image for stderr codec\n");
  96       return NULL;
  97    }
  98
  99    dv_decode_full_frame(decoder, data, e_dv_color_yuv, mpi->planes, mpi->stride);
 100
 101    return mpi;
 102 }