ifo_print.c

有关mpeg2的deocde代码

/* 
 * Copyright (C) 2000, 2001, 2002, 2003
 *               Bj鰎n Englund <[e-mail]>, 
 *               H錵an Hjort <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include <string.h>
#include <ctype.h>

#include "ifo_types.h"
#include "ifo_read.h"
#include "ifo_print.h"
#include "dvdread_internal.h"

/* Put this in some other file / package?  It's used in nav_print too. */
static void ifoPrint_time(dvd_time_t *dtime) {
  const char *rate;
  CHECK_VALUE((dtime->hour>>4) < 0xa && (dtime->hour&0xf) < 0xa);
  CHECK_VALUE((dtime->minute>>4) < 0x7 && (dtime->minute&0xf) < 0xa);
  CHECK_VALUE((dtime->second>>4) < 0x7 && (dtime->second&0xf) < 0xa);
  CHECK_VALUE((dtime->frame_u&0xf) < 0xa);
  
  printf("%02x:%02x:%02x.%02x", 
	 dtime->hour,
	 dtime->minute,
	 dtime->second,
	 dtime->frame_u & 0x3f);
  switch((dtime->frame_u & 0xc0) >> 6) {
  case 1:
    rate = "25.00";
    break;
  case 3:
    rate = "29.97";
    break;
  default:
    if(dtime->hour == 0 && dtime->minute == 0 
       && dtime->second == 0 && dtime->frame_u == 0)
      rate = "no";
    else
      rate = "(please send a bug report)";
    break;
  } 
  printf(" @ %s fps", rate);
}

/* Put this in some other file / package?  It's used in nav_print too.
   Possibly also by the vm / navigator. */
static void ifoPrint_CMD(int row, vm_cmd_t *command) {
  int i;

  printf("(%03d) ", row + 1);
  for(i=0;i<8;i++)
    printf("%02x ", command->bytes[i]);
  printf("| ");

  //vmcmd(command);
  printf("\n");
}

static void ifoPrint_video_attributes(video_attr_t *attr) {
  
  /* The following test is shorter but not correct ISO C,
     memcmp(attr,my_friendly_zeros, sizeof(video_attr_t)) */
  if(attr->mpeg_version == 0 
     && attr->video_format == 0 
     && attr->display_aspect_ratio == 0 
     && attr->permitted_df == 0 
     && attr->unknown1 == 0 
     && attr->line21_cc_1 == 0 
     && attr->line21_cc_2 == 0 
     && attr->bit_rate == 0 
     && attr->video_format == 0 
     && attr->letterboxed == 0 
     && attr->film_mode == 0) {
    printf("-- Unspecified --");
    return;
  }
  
  switch(attr->mpeg_version) {
  case 0:
    printf("mpeg1 ");
    break;
  case 1:
    printf("mpeg2 ");
    break;
  default:
    printf("(please send a bug report) ");
  }
  
  switch(attr->video_format) {
  case 0:
    printf("ntsc ");
    break;
  case 1:
    printf("pal ");
    break;
  default:
    printf("(please send a bug report) ");
  }
  
  switch(attr->display_aspect_ratio) {
  case 0:
    printf("4:3 ");
    break;
  case 3:
    printf("16:9 ");
    break;
  default:
    printf("(please send a bug report) ");
  }
  
  // Wide is allways allowed..!!!
  switch(attr->permitted_df) {
  case 0:
    printf("pan&scan+letterboxed ");
    break;
  case 1:
    printf("only pan&scan "); //??
    break;
  case 2:
    printf("only letterboxed ");
    break;
  case 3:
    // not specified
    break;
  default:
    printf("(please send a bug report)");
  }
  
  printf("U%x ", attr->unknown1);
  CHECK_VALUE(!attr->unknown1);
  
  if(attr->line21_cc_1 || attr->line21_cc_2) {
    printf("NTSC CC ");
    if(attr->line21_cc_1)
      printf("1 ");
    if(attr->line21_cc_2)
      printf("2 ");
  }

  switch(attr->bit_rate) {
    case 0:
      printf("Variable Bit Rate ");
      break;
    case 1:
      printf("Constant Bit Rate ");
      break;
    default:
      printf("(please send a bug report)");
  }
  
  {
    int height = 480;
    if(attr->video_format != 0) 
      height = 576;
    switch(attr->picture_size) {
    case 0:
      printf("720x%d ", height);
      break;
    case 1:
      printf("704x%d ", height);
      break;
    case 2:
      printf("352x%d ", height);
      break;
    case 3:
      printf("352x%d ", height/2);
      break;      
    default:
      printf("(please send a bug report) ");
    }
  }

  if(attr->letterboxed) {
    printf("source letterboxed ");
  }
  
  if(attr->film_mode) {
    printf("film");
  } else {
    printf("video"); //camera
  }
}

static void ifoPrint_audio_attributes(audio_attr_t *attr) {
  
  if(attr->audio_format == 0
     && attr->multichannel_extension == 0
     && attr->lang_type == 0
     && attr->application_mode == 0
     && attr->quantization == 0
     && attr->sample_frequency == 0
     && attr->channels == 0
     && attr->lang_code == 0
     && attr->lang_extension == 0
     && attr->code_extension == 0
     && attr->unknown3 == 0
     && attr->unknown1 == 0) {
    printf("-- Unspecified --");
    return;
  }
  
  switch(attr->audio_format) {
  case 0:
    printf("ac3 ");
    break;
  case 1:
    printf("(please send a bug report) ");
    break;
  case 2:
    printf("mpeg1 ");
    break;
  case 3:
    printf("mpeg2ext ");
    break;
  case 4:
    printf("lpcm ");
    break;
  case 5:
    printf("(please send a bug report) ");
    break;
  case 6:
    printf("dts ");
    break;
  default:
    printf("(please send a bug report) ");
  }
  
  if(attr->multichannel_extension)
    printf("multichannel_extension ");
  
  switch(attr->lang_type) {
  case 0:
    // not specified
    CHECK_VALUE(attr->lang_code == 0 || attr->lang_code == 0xffff);
    break;
  case 1:
    printf("%c%c (%c) ", attr->lang_code>>8, attr->lang_code & 0xff,
           attr->lang_extension ? attr->lang_extension : ' ');
    break;
  default:
    printf("(please send a bug report) ");
  }

  switch(attr->application_mode) {
  case 0:
    // not specified
    break;
  case 1:
    printf("karaoke mode ");
    break;
  case 2:
    printf("surround sound mode ");
    break;
  default:
    printf("(please send a bug report) ");
  }
  
  switch(attr->quantization) {
  case 0:
    printf("16bit ");
    break;
  case 1:
    printf("20bit ");
    break;
  case 2:
    printf("24bit ");
    break;
  case 3:
    printf("drc ");
    break;
  default:
    printf("(please send a bug report) ");
  }
  
  switch(attr->sample_frequency) {
  case 0:
    printf("48kHz ");
    break;
  case 1:
    printf("??kHz ");
    break;
  default:
    printf("sample_frequency %i (please send a bug report) ", 
	   attr->sample_frequency);
  }
  
  printf("%dCh ", attr->channels + 1);
  
  switch(attr->code_extension) {
  case 0:
    printf("Not specified ");
    break;
  case 1: // Normal audio
    printf("Normal Caption ");
    break;
  case 2: // visually imparied
    printf("Audio for visually impaired ");
    break;
  case 3: // Directors 1
    printf("Director's comments 1 ");
    break;
  case 4: // Directors 2
    printf("Director's comments 2 ");
    break;
    //case 4: // Music score ?    
  default:
    printf("(please send a bug report) ");
  }
    
  printf("%d ", attr->unknown3);
  if(attr->application_mode == 1) {
    printf("ca=%d ", attr->app_info.karaoke.channel_assignment);
    printf("%d ", attr->app_info.karaoke.version);
    if(attr->app_info.karaoke.mc_intro) 
      printf("mc intro ");
    printf("%s ", attr->app_info.karaoke.mode ? "duet" : "solo");
    printf("%d ", attr->app_info.karaoke.unknown4);
  }
  if(attr->application_mode == 2) {
    if(attr->app_info.surround.dolby_encoded) {
      printf("dolby surround ");
    }
    printf("%d ", attr->app_info.surround.unknown5);
    printf("%d ", attr->app_info.surround.unknown6);
  }    
}

static void ifoPrint_subp_attributes(subp_attr_t *attr) {
  
  if(attr->type == 0
     && attr->code_mode == 0
     && attr->lang_code == 0
     && attr->lang_extension == 0
     && attr->zero1 == 0
     && attr->zero2 == 0
     && attr->code_extension == 0) {
    printf("-- Unspecified --");
    return;
  }
  
  switch(attr->code_mode) {
  case 0:
    printf("Coding Mode RLE ");
    break;
  case 1:
    printf("Coding Mode Extended ");
    break;
  default:
    printf("(please send a bug report) ");
  }    
 
  if(attr->type == 1) {
    if(isalpha((int)(attr->lang_code >> 8))
       && isalpha((int)(attr->lang_code & 0xff))) {
      printf("%c%c ", attr->lang_code >> 8, attr->lang_code & 0xff);
    } else {
      printf("%02x%02x ", attr->lang_code >> 8, attr->lang_code & 0xff);
    }
  } else {
      printf("lang not specified ");
  }