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 <fcntl.h>
  20 #include <inttypes.h>
  21 #include <unistd.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <libavutil/intreadwrite.h>
  25
  26 #include "config.h"
  27
  28 #include <dvdread/ifo_types.h>
  29
  30 #ifdef __FreeBSD__
  31 #include <sys/cdrio.h>
  32 #endif
  33
  34 #ifdef __linux__
  35 #include <linux/cdrom.h>
  36 #include <scsi/sg.h>
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #include <sys/ioctl.h>
  40 #endif
  41
  42 #include "mp_msg.h"
  43 #include "stream_dvd_common.h"
  44
  45 const char * const dvd_audio_stream_types[8] = { "ac3","unknown","mpeg1","mpeg2ext","lpcm","unknown","dts" };
  46 const char * const dvd_audio_stream_channels[6] = { "mono", "stereo", "unknown", "unknown", "5.1/6.1", "5.1" };
  47
  48 int dvd_speed=0; /* 0 => don't touch speed */
  49
  50 void dvd_set_speed(char *device, unsigned speed)
  51 {
  52 #if defined(__linux__) && defined(SG_IO) && defined(GPCMD_SET_STREAMING)
  53   int fd;
  54   unsigned char buffer[28];
  55   unsigned char cmd[12];
  56   struct sg_io_hdr sghdr;
  57   struct stat st;
  58
  59   memset(&st, 0, sizeof(st));
  60
  61   if (stat(device, &st) == -1) return;
  62
  63   if (!S_ISBLK(st.st_mode)) return; /* not a block device */
  64
  65   switch (speed) {
  66   case 0: /* don't touch speed setting */
  67     return;
  68   case -1: /* restore default value */
  69     if (dvd_speed == 0) return; /* we haven't touched the speed setting */
  70     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Restoring DVD speed... ");
  71     break;
  72   default: /* limit to <speed> KB/s */
  73     // speed < 100 is multiple of DVD single speed (1350KB/s)
  74     if (speed < 100)
  75       speed *= 1350;
  76     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Limiting DVD speed to %dKB/s... ", speed);
  77     break;
  78   }
  79
  80   memset(&sghdr, 0, sizeof(sghdr));
  81   sghdr.interface_id = 'S';
  82   sghdr.timeout = 5000;
  83   sghdr.dxfer_direction = SG_DXFER_TO_DEV;
  84   sghdr.dxfer_len = sizeof(buffer);
  85   sghdr.dxferp = buffer;
  86   sghdr.cmd_len = sizeof(cmd);
  87   sghdr.cmdp = cmd;
  88
  89   memset(cmd, 0, sizeof(cmd));
  90   cmd[0] = GPCMD_SET_STREAMING;
  91   cmd[10] = sizeof(buffer);
  92
  93   memset(buffer, 0, sizeof(buffer));
  94   /* first sector 0, last sector 0xffffffff */
  95   AV_WB32(buffer + 8, 0xffffffff);
  96   if (speed == -1)
  97     buffer[0] = 4; /* restore default */
  98   else {
  99     /* <speed> kilobyte */
 100     AV_WB32(buffer + 12, speed);
 101     AV_WB32(buffer + 20, speed);
 102   }
 103   /* 1 second */
 104   AV_WB16(buffer + 18, 1000);
 105   AV_WB16(buffer + 26, 1000);
 106
 107   fd = open(device, O_RDWR | O_NONBLOCK);
 108   if (fd == -1) {
 109     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Couldn't open DVD device for writing, changing DVD speed needs write access.\n");
 110     return;
 111   }
 112
 113   if (ioctl(fd, SG_IO, &sghdr) < 0)
 114     mp_tmsg(MSGT_OPEN, MSGL_INFO, "failed\n");
 115   else
 116     mp_tmsg(MSGT_OPEN, MSGL_INFO, "successful\n");
 117
 118   close(fd);
 119 #endif
 120 }
 121
 122 /**
 123 \brief Converts DVD time structure to milliseconds.
 124 \param *dev the DVD time structure to convert
 125 \return returns the time in milliseconds
 126 */
 127 int mp_dvdtimetomsec(dvd_time_t *dt)
 128 {
 129   static int framerates[4] = {0, 2500, 0, 2997};
 130   int framerate = framerates[(dt->frame_u & 0xc0) >> 6];
 131   int msec = (((dt->hour & 0xf0) >> 3) * 5 + (dt->hour & 0x0f)) * 3600000;
 132   msec += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
 133   msec += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
 134   if(framerate > 0)
 135     msec += (((dt->frame_u & 0x30) >> 3) * 5 + (dt->frame_u & 0x0f)) * 100000 / framerate;
 136   return msec;
 137 }