stream/stream_dvd_common.c

   1 #include "config.h"
   2 #include <fcntl.h>
   3 #include <inttypes.h>
   4 #include <unistd.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7 #include <dvdread/ifo_types.h>
   8 #ifdef __FreeBSD__
   9 #include <sys/cdrio.h>
  10 #endif
  11
  12 #ifdef __linux__
  13 #include <linux/cdrom.h>
  14 #include <scsi/sg.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <sys/ioctl.h>
  18 #endif
  19
  20 #include "mp_msg.h"
  21 #include "help_mp.h"
  22 #include "stream_dvd_common.h"
  23 #include "ffmpeg_files/intreadwrite.h"
  24
  25 const char * const dvd_audio_stream_types[8] = { "ac3","unknown","mpeg1","mpeg2ext","lpcm","unknown","dts" };
  26 const char * const dvd_audio_stream_channels[6] = { "mono", "stereo", "unknown", "unknown", "5.1/6.1", "5.1" };
  27
  28 int dvd_speed=0; /* 0 => don't touch speed */
  29
  30 void dvd_set_speed(char *device, unsigned speed)
  31 {
  32 #if defined(__linux__) && defined(SG_IO) && defined(GPCMD_SET_STREAMING)
  33   int fd;
  34   unsigned char buffer[28];
  35   unsigned char cmd[12];
  36   struct sg_io_hdr sghdr;
  37   struct stat st;
  38
  39   memset(&st, 0, sizeof(st));
  40
  41   if (stat(device, &st) == -1) return;
  42
  43   if (!S_ISBLK(st.st_mode)) return; /* not a block device */
  44
  45   switch (speed) {
  46   case 0: /* don't touch speed setting */
  47     return;
  48   case -1: /* restore default value */
  49     if (dvd_speed == 0) return; /* we haven't touched the speed setting */
  50     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Restoring DVD speed... ");
  51     break;
  52   default: /* limit to <speed> KB/s */
  53     // speed < 100 is multiple of DVD single speed (1350KB/s)
  54     if (speed < 100)
  55       speed *= 1350;
  56     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Limiting DVD speed to %dKB/s... ", speed);
  57     break;
  58   }
  59
  60   memset(&sghdr, 0, sizeof(sghdr));
  61   sghdr.interface_id = 'S';
  62   sghdr.timeout = 5000;
  63   sghdr.dxfer_direction = SG_DXFER_TO_DEV;
  64   sghdr.dxfer_len = sizeof(buffer);
  65   sghdr.dxferp = buffer;
  66   sghdr.cmd_len = sizeof(cmd);
  67   sghdr.cmdp = cmd;
  68
  69   memset(cmd, 0, sizeof(cmd));
  70   cmd[0] = GPCMD_SET_STREAMING;
  71   cmd[10] = sizeof(buffer);
  72
  73   memset(buffer, 0, sizeof(buffer));
  74   /* first sector 0, last sector 0xffffffff */
  75   AV_WB32(buffer + 8, 0xffffffff);
  76   if (speed == -1)
  77     buffer[0] = 4; /* restore default */
  78   else {
  79     /* <speed> kilobyte */
  80     AV_WB32(buffer + 12, speed);
  81     AV_WB32(buffer + 20, speed);
  82   }
  83   /* 1 second */
  84   AV_WB16(buffer + 18, 1000);
  85   AV_WB16(buffer + 26, 1000);
  86
  87   fd = open(device, O_RDWR | O_NONBLOCK);
  88   if (fd == -1) {
  89     mp_tmsg(MSGT_OPEN, MSGL_INFO, "Couldn't open DVD device for writing, changing DVD speed needs write access.\n");
  90     return;
  91   }
  92
  93   if (ioctl(fd, SG_IO, &sghdr) < 0)
  94     mp_tmsg(MSGT_OPEN, MSGL_INFO, "failed\n");
  95   else
  96     mp_tmsg(MSGT_OPEN, MSGL_INFO, "successful\n");
  97
  98   close(fd);
  99 #endif
 100 }
 101
 102 /**
 103 \brief Converts DVD time structure to milliseconds.
 104 \param *dev the DVD time structure to convert
 105 \return returns the time in milliseconds
 106 */
 107 int mp_dvdtimetomsec(dvd_time_t *dt)
 108 {
 109   static int framerates[4] = {0, 2500, 0, 2997};
 110   int framerate = framerates[(dt->frame_u & 0xc0) >> 6];
 111   int msec = (((dt->hour & 0xf0) >> 3) * 5 + (dt->hour & 0x0f)) * 3600000;
 112   msec += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
 113   msec += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
 114   if(framerate > 0)
 115     msec += (((dt->frame_u & 0x30) >> 3) * 5 + (dt->frame_u & 0x0f)) * 100000 / framerate;
 116   return msec;
 117 }