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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fcntl.h>
#include <inttypes.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <assert.h>
#include <libavutil/intreadwrite.h>
#include "config.h"
#include <dvdread/ifo_types.h>
#ifdef __FreeBSD__
#include <sys/cdrio.h>
#endif
#ifdef __linux__
#include <linux/cdrom.h>
#include <scsi/sg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#endif
#include "osdep/io.h"
#include "common/msg.h"
#include "misc/bstr.h"
#include "stream_dvd_common.h"
const char * const dvd_audio_stream_types[8] = { "ac3","unknown","mpeg1","mpeg2ext","lpcm","unknown","dts" };
const char * const dvd_audio_stream_channels[6] = { "mono", "stereo", "unknown", "unknown", "5.1/6.1", "5.1" };
void dvd_set_speed(stream_t *stream, char *device, unsigned speed)
{
#if defined(__linux__) && defined(SG_IO) && defined(GPCMD_SET_STREAMING)
int fd;
unsigned char buffer[28];
unsigned char cmd[12];
struct sg_io_hdr sghdr;
struct stat st;
memset(&st, 0, sizeof(st));
if (stat(device, &st) == -1) return;
if (!S_ISBLK(st.st_mode)) return; /* not a block device */
switch (speed) {
case 0: /* don't touch speed setting */
return;
case -1: /* restore default value */
MP_INFO(stream, "Restoring DVD speed... ");
break;
default: /* limit to <speed> KB/s */
// speed < 100 is multiple of DVD single speed (1350KB/s)
if (speed < 100)
speed *= 1350;
MP_INFO(stream, "Limiting DVD speed to %dKB/s... ", speed);
break;
}
memset(&sghdr, 0, sizeof(sghdr));
sghdr.interface_id = 'S';
sghdr.timeout = 5000;
sghdr.dxfer_direction = SG_DXFER_TO_DEV;
sghdr.dxfer_len = sizeof(buffer);
sghdr.dxferp = buffer;
sghdr.cmd_len = sizeof(cmd);
sghdr.cmdp = cmd;
memset(cmd, 0, sizeof(cmd));
cmd[0] = GPCMD_SET_STREAMING;
cmd[10] = sizeof(buffer);
memset(buffer, 0, sizeof(buffer));
/* first sector 0, last sector 0xffffffff */
AV_WB32(buffer + 8, 0xffffffff);
if (speed == -1)
buffer[0] = 4; /* restore default */
else {
/* <speed> kilobyte */
AV_WB32(buffer + 12, speed);
AV_WB32(buffer + 20, speed);
}
/* 1 second */
AV_WB16(buffer + 18, 1000);
AV_WB16(buffer + 26, 1000);
fd = open(device, O_RDWR | O_NONBLOCK | O_CLOEXEC);
if (fd == -1) {
MP_INFO(stream, "Couldn't open DVD device for writing, changing DVD speed needs write access.\n");
return;
}
if (ioctl(fd, SG_IO, &sghdr) < 0)
MP_INFO(stream, "failed\n");
else
MP_INFO(stream, "successful\n");
close(fd);
#endif
}
/**
\brief Converts DVD time structure to milliseconds.
\param *dev the DVD time structure to convert
\return returns the time in milliseconds
*/
int mp_dvdtimetomsec(dvd_time_t *dt)
{
int framerates[4] = {0, 2500, 0, 2997};
int framerate = framerates[(dt->frame_u & 0xc0) >> 6];
int msec = (((dt->hour & 0xf0) >> 3) * 5 + (dt->hour & 0x0f)) * 3600000;
msec += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
msec += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
if(framerate > 0)
msec += (((dt->frame_u & 0x30) >> 3) * 5 + (dt->frame_u & 0x0f)) * 100000 / framerate;
return msec;
}
// Check if this is likely to be an .ifo or similar file.
int dvd_probe(const char *path, const char *ext, const char *sig)
{
if (!bstr_case_endswith(bstr0(path), bstr0(ext)))
return false;
FILE *temp = fopen(path, "rb");
if (!temp)
return false;
bool r = false;
char data[50];
assert(strlen(sig) <= sizeof(data));
if (fread(data, 50, 1, temp) == 1) {
if (memcmp(data, sig, strlen(sig)) == 0)
r = true;
}
fclose(temp);
return r;
}
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