stream/stream_dvd_common.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 "config.h"
  20 #include <fcntl.h>
  21 #include <inttypes.h>
  22 #include <unistd.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <dvdread/ifo_types.h>
  26 #ifdef __FreeBSD__
  27 #include <sys/cdrio.h>
  28 #endif
  29
  30 #ifdef __linux__
  31 #include <linux/cdrom.h>
  32 #include <scsi/sg.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <sys/ioctl.h>
  36 #endif
  37
  38 #include "mp_msg.h"
  39 #include "stream_dvd_common.h"
  40 #include "ffmpeg_files/intreadwrite.h"
  41
  42 const char * const dvd_audio_stream_types[8] = { "ac3","unknown","mpeg1","mpeg2ext","lpcm","unknown","dts" };
  43 const char * const dvd_audio_stream_channels[6] = { "mono", "stereo", "unknown", "unknown", "5.1/6.1", "5.1" };
  44
  45 int dvd_speed=0; /* 0 => don't touch speed */
  46
  47 void dvd_set_speed(char *device, unsigned speed)
  48 {
  49 #if defined(__linux__) && defined(SG_IO) && defined(GPCMD_SET_STREAMING)
  50   int fd;
  51   unsigned char buffer[28];
  52   unsigned char cmd[12];
  53   struct sg_io_hdr sghdr;
  54   struct stat st;
  55
  56   memset(&st, 0, sizeof(st));
  57
  58   if (stat(device, &st) == -1) return;
  59
  60   if (!S_ISBLK(st.st_mode)) return; /* not a block device */
  61
  62   switch (speed) {
  63   case 0: /* don't touch speed setting */
  64     return;
  65   case -1: /* restore default value */
  66     if (dvd_speed == 0) return; /* we haven't touched the speed setting */
  67     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Restoring DVD speed... ");
  68     break;
  69   default: /* limit to <speed> KB/s */
  70     // speed < 100 is multiple of DVD single speed (1350KB/s)
  71     if (speed < 100)
  72       speed *= 1350;
  73     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Limiting DVD speed to %dKB/s... ", speed);
  74     break;
  75   }
  76
  77   memset(&sghdr, 0, sizeof(sghdr));
  78   sghdr.interface_id = 'S';
  79   sghdr.timeout = 5000;
  80   sghdr.dxfer_direction = SG_DXFER_TO_DEV;
  81   sghdr.dxfer_len = sizeof(buffer);
  82   sghdr.dxferp = buffer;
  83   sghdr.cmd_len = sizeof(cmd);
  84   sghdr.cmdp = cmd;
  85
  86   memset(cmd, 0, sizeof(cmd));
  87   cmd[0] = GPCMD_SET_STREAMING;
  88   cmd[10] = sizeof(buffer);
  89
  90   memset(buffer, 0, sizeof(buffer));
  91   /* first sector 0, last sector 0xffffffff */
  92   AV_WB32(buffer + 8, 0xffffffff);
  93   if (speed == -1)
  94     buffer[0] = 4; /* restore default */
  95   else {
  96     /* <speed> kilobyte */
  97     AV_WB32(buffer + 12, speed);
  98     AV_WB32(buffer + 20, speed);
  99   }
 100   /* 1 second */
 101   AV_WB16(buffer + 18, 1000);
 102   AV_WB16(buffer + 26, 1000);
 103
 104   fd = open(device, O_RDWR | O_NONBLOCK);
 105   if (fd == -1) {
 106     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Couldn't open DVD device for writing, changing DVD speed needs write access.\n");
 107     return;
 108   }
 109
 110   if (ioctl(fd, SG_IO, &sghdr) < 0)
 111     mp_tmsg(MSGT_OPEN, MSGL_INFO, "failed\n");
 112   else
 113     mp_tmsg(MSGT_OPEN, MSGL_INFO, "successful\n");
 114
 115   close(fd);
 116 #endif
 117 }
 118
 119 /**
 120 \brief Converts DVD time structure to milliseconds.
 121 \param *dev the DVD time structure to convert
 122 \return returns the time in milliseconds
 123 */
 124 int mp_dvdtimetomsec(dvd_time_t *dt)
 125 {
 126   static int framerates[4] = {0, 2500, 0, 2997};
 127   int framerate = framerates[(dt->frame_u & 0xc0) >> 6];
 128   int msec = (((dt->hour & 0xf0) >> 3) * 5 + (dt->hour & 0x0f)) * 3600000;
 129   msec += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
 130   msec += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
 131   if(framerate > 0)
 132     msec += (((dt->frame_u & 0x30) >> 3) * 5 + (dt->frame_u & 0x0f)) * 100000 / framerate;
 133   return msec;
 134 }