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mpv/stream/stream_dvdnav.c

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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 "config.h"
#if !HAVE_GPL
#error GPL only
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#ifdef __linux__
#include <linux/cdrom.h>
#include <scsi/sg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#endif
#include <dvdnav/dvdnav.h>
#include <libavutil/common.h>
#include <libavutil/intreadwrite.h>
#include "osdep/io.h"
#include "options/options.h"
#include "common/msg.h"
#include "input/input.h"
#include "options/m_config.h"
#include "options/path.h"
#include "osdep/timer.h"
#include "stream.h"
#include "demux/demux.h"
#include "video/out/vo.h"
#define TITLE_MENU -1
#define TITLE_LONGEST -2
struct priv {
dvdnav_t *dvdnav; // handle to libdvdnav stuff
char *filename; // path
unsigned int duration; // in milliseconds
int mousex, mousey;
int title;
uint32_t spu_clut[16];
bool spu_clut_valid;
bool had_initial_vts;
int dvd_speed;
int track;
char *device;
struct dvd_opts *opts;
};
struct dvd_opts {
int angle;
int speed;
char *device;
};
#define OPT_BASE_STRUCT struct dvd_opts
const struct m_sub_options dvd_conf = {
.opts = (const struct m_option[]){
{"device", OPT_STRING(device), .flags = M_OPT_FILE},
{"speed", OPT_INT(speed)},
{"angle", OPT_INT(angle), M_RANGE(1, 99)},
{0}
},
.size = sizeof(struct dvd_opts),
.defaults = &(const struct dvd_opts){
.angle = 1,
},
};
#define DNE(e) [e] = # e
static const char *const mp_dvdnav_events[] = {
DNE(DVDNAV_BLOCK_OK),
DNE(DVDNAV_NOP),
DNE(DVDNAV_STILL_FRAME),
DNE(DVDNAV_SPU_STREAM_CHANGE),
DNE(DVDNAV_AUDIO_STREAM_CHANGE),
DNE(DVDNAV_VTS_CHANGE),
DNE(DVDNAV_CELL_CHANGE),
DNE(DVDNAV_NAV_PACKET),
DNE(DVDNAV_STOP),
DNE(DVDNAV_HIGHLIGHT),
DNE(DVDNAV_SPU_CLUT_CHANGE),
DNE(DVDNAV_HOP_CHANNEL),
DNE(DVDNAV_WAIT),
};
#define LOOKUP_NAME(array, i) \
(((i) >= 0 && (i) < MP_ARRAY_SIZE(array)) ? array[(i)] : "?")
static 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
}
// Check if this is likely to be an .ifo or similar file.
static 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;
}
/**
* \brief mp_dvdnav_lang_from_aid() returns the language corresponding to audio id 'aid'
* \param stream: - stream pointer
* \param sid: physical subtitle id
* \return 0 on error, otherwise language id
*/
static int mp_dvdnav_lang_from_aid(stream_t *stream, int aid)
{
uint8_t lg;
uint16_t lang;
struct priv *priv = stream->priv;
if (aid < 0)
return 0;
lg = dvdnav_get_audio_logical_stream(priv->dvdnav, aid & 0x7);
if (lg == 0xff)
return 0;
lang = dvdnav_audio_stream_to_lang(priv->dvdnav, lg);
if (lang == 0xffff)
return 0;
return lang;
}
/**
* \brief mp_dvdnav_lang_from_sid() returns the language corresponding to subtitle id 'sid'
* \param stream: - stream pointer
* \param sid: physical subtitle id
* \return 0 on error, otherwise language id
*/
static int mp_dvdnav_lang_from_sid(stream_t *stream, int sid)
{
uint8_t k;
uint16_t lang;
struct priv *priv = stream->priv;
if (sid < 0)
return 0;
for (k = 0; k < 32; k++)
if (dvdnav_get_spu_logical_stream(priv->dvdnav, k) == sid)
break;
if (k == 32)
return 0;
lang = dvdnav_spu_stream_to_lang(priv->dvdnav, k);
if (lang == 0xffff)
return 0;
return lang;
}
/**
* \brief mp_dvdnav_number_of_subs() returns the count of available subtitles
* \param stream: - stream pointer
* \return 0 on error, something meaningful otherwise
*/
static int mp_dvdnav_number_of_subs(stream_t *stream)
{
struct priv *priv = stream->priv;
uint8_t lg, k, n = 0;
for (k = 0; k < 32; k++) {
lg = dvdnav_get_spu_logical_stream(priv->dvdnav, k);
if (lg == 0xff)
continue;
if (lg >= n)
n = lg + 1;
}
return n;
}
static int fill_buffer(stream_t *s, void *buf, int max_len)
{
struct priv *priv = s->priv;
dvdnav_t *dvdnav = priv->dvdnav;
if (max_len < 2048) {
MP_FATAL(s, "Short read size. Data corruption will follow. Please "
"provide a patch.\n");
return -1;
}
while (1) {
int len = -1;
int event = DVDNAV_NOP;
if (dvdnav_get_next_block(dvdnav, buf, &event, &len) != DVDNAV_STATUS_OK)
{
MP_ERR(s, "Error getting next block from DVD %d (%s)\n",
event, dvdnav_err_to_string(dvdnav));
return 0;
}
if (event != DVDNAV_BLOCK_OK) {
const char *name = LOOKUP_NAME(mp_dvdnav_events, event);
MP_TRACE(s, "DVDNAV: event %s (%d).\n", name, event);
}
switch (event) {
case DVDNAV_BLOCK_OK:
return len;
case DVDNAV_STOP:
return 0;
case DVDNAV_NAV_PACKET: {
pci_t *pnavpci = dvdnav_get_current_nav_pci(dvdnav);
uint32_t start_pts = pnavpci->pci_gi.vobu_s_ptm;
MP_TRACE(s, "start pts = %"PRIu32"\n", start_pts);
break;
}
case DVDNAV_STILL_FRAME:
dvdnav_still_skip(dvdnav);
return 0;
case DVDNAV_WAIT:
dvdnav_wait_skip(dvdnav);
return 0;
case DVDNAV_HIGHLIGHT:
break;
case DVDNAV_VTS_CHANGE: {
int tit = 0, part = 0;
dvdnav_vts_change_event_t *vts_event =
(dvdnav_vts_change_event_t *)s->buffer;
MP_INFO(s, "DVDNAV, switched to title: %d\n",
vts_event->new_vtsN);
if (!priv->had_initial_vts) {
// dvdnav sends an initial VTS change before any data; don't
// cause a blocking wait for the player, because the player in
// turn can't initialize the demuxer without data.
priv->had_initial_vts = true;
break;
}
if (dvdnav_current_title_info(dvdnav, &tit, &part) == DVDNAV_STATUS_OK)
{
MP_VERBOSE(s, "DVDNAV, NEW TITLE %d\n", tit);
if (priv->title > 0 && tit != priv->title)
MP_WARN(s, "Requested title not found\n");
}
break;
}
case DVDNAV_CELL_CHANGE: {
dvdnav_cell_change_event_t *ev = (dvdnav_cell_change_event_t *)buf;
if (ev->pgc_length)
priv->duration = ev->pgc_length / 90;
break;
}
case DVDNAV_SPU_CLUT_CHANGE: {
memcpy(priv->spu_clut, buf, 16 * sizeof(uint32_t));
priv->spu_clut_valid = true;
break;
}
}
}
return 0;
}
static int control(stream_t *stream, int cmd, void *arg)
{
struct priv *priv = stream->priv;
dvdnav_t *dvdnav = priv->dvdnav;
int tit, part;
switch (cmd) {
case STREAM_CTRL_GET_NUM_CHAPTERS: {
if (dvdnav_current_title_info(dvdnav, &tit, &part) != DVDNAV_STATUS_OK)
break;
if (dvdnav_get_number_of_parts(dvdnav, tit, &part) != DVDNAV_STATUS_OK)
break;
if (!part)
break;
*(unsigned int *)arg = part;
return 1;
}
case STREAM_CTRL_GET_CHAPTER_TIME: {
double *ch = arg;
int chapter = *ch;
if (dvdnav_current_title_info(dvdnav, &tit, &part) != DVDNAV_STATUS_OK)
break;
uint64_t *parts = NULL, duration = 0;
int n = dvdnav_describe_title_chapters(dvdnav, tit, &parts, &duration);
if (!parts)
break;
if (chapter < 0 || chapter + 1 > n)
break;
*ch = chapter > 0 ? parts[chapter - 1] / 90000.0 : 0;
free(parts);
return 1;
}
case STREAM_CTRL_GET_TIME_LENGTH: {
if (priv->duration) {
*(double *)arg = (double)priv->duration / 1000.0;
return 1;
}
break;
}
case STREAM_CTRL_GET_ASPECT_RATIO: {
uint8_t ar = dvdnav_get_video_aspect(dvdnav);
*(double *)arg = !ar ? 4.0 / 3.0 : 16.0 / 9.0;
return 1;
}
case STREAM_CTRL_GET_CURRENT_TIME: {
double tm;
tm = dvdnav_get_current_time(dvdnav) / 90000.0f;
if (tm != -1) {
*(double *)arg = tm;
return 1;
}
break;
}
case STREAM_CTRL_GET_NUM_TITLES: {
int32_t num_titles = 0;
if (dvdnav_get_number_of_titles(dvdnav, &num_titles) != DVDNAV_STATUS_OK)
break;
*((unsigned int*)arg)= num_titles;
return STREAM_OK;
}
case STREAM_CTRL_GET_TITLE_LENGTH: {
int t = *(double *)arg;
int32_t num_titles = 0;
if (dvdnav_get_number_of_titles(dvdnav, &num_titles) != DVDNAV_STATUS_OK)
break;
if (t < 0 || t >= num_titles)
break;
uint64_t duration = 0;
uint64_t *parts = NULL;
dvdnav_describe_title_chapters(dvdnav, t + 1, &parts, &duration);
if (!parts)
break;
free(parts);
*(double *)arg = duration / 90000.0;
return STREAM_OK;
}
case STREAM_CTRL_GET_CURRENT_TITLE: {
if (dvdnav_current_title_info(dvdnav, &tit, &part) != DVDNAV_STATUS_OK)
break;
*((unsigned int *) arg) = tit - 1;
return STREAM_OK;
}
case STREAM_CTRL_SET_CURRENT_TITLE: {
int title = *((unsigned int *) arg);
if (dvdnav_title_play(priv->dvdnav, title + 1) != DVDNAV_STATUS_OK)
break;
stream_drop_buffers(stream);
return STREAM_OK;
}
case STREAM_CTRL_SEEK_TO_TIME: {
double *args = arg;
double d = args[0]; // absolute target timestamp
int flags = args[1]; // from SEEK_* flags (demux.h)
if (flags & SEEK_HR)
d -= 10; // fudge offset; it's a hack, because fuck libdvd*
int64_t tm = (int64_t)(d * 90000);
if (tm < 0)
tm = 0;
if (priv->duration && tm >= (priv->duration * 90))
tm = priv->duration * 90 - 1;
uint32_t pos, len;
if (dvdnav_get_position(dvdnav, &pos, &len) != DVDNAV_STATUS_OK)
break;
MP_VERBOSE(stream, "seek to PTS %f (%"PRId64")\n", d, tm);
if (dvdnav_time_search(dvdnav, tm) != DVDNAV_STATUS_OK)
break;
stream_drop_buffers(stream);
d = dvdnav_get_current_time(dvdnav) / 90000.0f;
MP_VERBOSE(stream, "landed at: %f\n", d);
if (dvdnav_get_position(dvdnav, &pos, &len) == DVDNAV_STATUS_OK)
MP_VERBOSE(stream, "block: %lu\n", (unsigned long)pos);
return STREAM_OK;
}
case STREAM_CTRL_GET_NUM_ANGLES: {
uint32_t curr, angles;
if (dvdnav_get_angle_info(dvdnav, &curr, &angles) != DVDNAV_STATUS_OK)
break;
*(int *)arg = angles;
return 1;
}
case STREAM_CTRL_GET_ANGLE: {
uint32_t curr, angles;
if (dvdnav_get_angle_info(dvdnav, &curr, &angles) != DVDNAV_STATUS_OK)
break;
*(int *)arg = curr;
return 1;
}
case STREAM_CTRL_SET_ANGLE: {
uint32_t curr, angles;
int new_angle = *(int *)arg;
if (dvdnav_get_angle_info(dvdnav, &curr, &angles) != DVDNAV_STATUS_OK)
break;
if (new_angle > angles || new_angle < 1)
break;
if (dvdnav_angle_change(dvdnav, new_angle) != DVDNAV_STATUS_OK)
return 1;
break;
}
case STREAM_CTRL_GET_LANG: {
struct stream_lang_req *req = arg;
int lang = 0;
switch (req->type) {
case STREAM_AUDIO:
lang = mp_dvdnav_lang_from_aid(stream, req->id);
break;
case STREAM_SUB:
lang = mp_dvdnav_lang_from_sid(stream, req->id);
break;
}
if (!lang)
break;
snprintf(req->name, sizeof(req->name), "%c%c", lang >> 8, lang);
return STREAM_OK;
}
case STREAM_CTRL_GET_DVD_INFO: {
struct stream_dvd_info_req *req = arg;
memset(req, 0, sizeof(*req));
req->num_subs = mp_dvdnav_number_of_subs(stream);
static_assert(sizeof(uint32_t) == sizeof(unsigned int), "");
memcpy(req->palette, priv->spu_clut, sizeof(req->palette));
return STREAM_OK;
}
case STREAM_CTRL_GET_DISC_NAME: {
const char *volume = NULL;
if (dvdnav_get_title_string(dvdnav, &volume) != DVDNAV_STATUS_OK)
break;
if (!volume || !volume[0])
break;
*(char**)arg = talloc_strdup(NULL, volume);
return STREAM_OK;
}
}
return STREAM_UNSUPPORTED;
}
static void stream_dvdnav_close(stream_t *s)
{
struct priv *priv = s->priv;
dvdnav_close(priv->dvdnav);
priv->dvdnav = NULL;
if (priv->dvd_speed)
dvd_set_speed(s, priv->filename, -1);
if (priv->filename)
free(priv->filename);
}
static struct priv *new_dvdnav_stream(stream_t *stream, char *filename)
{
struct priv *priv = stream->priv;
const char *title_str;
if (!filename)
return NULL;
if (!(priv->filename = strdup(filename)))
return NULL;
priv->dvd_speed = priv->opts->speed;
dvd_set_speed(stream, priv->filename, priv->dvd_speed);
if (dvdnav_open(&(priv->dvdnav), priv->filename) != DVDNAV_STATUS_OK) {
free(priv->filename);
priv->filename = NULL;
return NULL;
}
if (!priv->dvdnav)
return NULL;
dvdnav_set_readahead_flag(priv->dvdnav, 1);
if (dvdnav_set_PGC_positioning_flag(priv->dvdnav, 1) != DVDNAV_STATUS_OK)
MP_ERR(stream, "stream_dvdnav, failed to set PGC positioning\n");
/* report the title?! */
dvdnav_get_title_string(priv->dvdnav, &title_str);
return priv;
}
static int open_s_internal(stream_t *stream)
{
struct priv *priv, *p;
priv = p = stream->priv;
char *filename;
p->opts = mp_get_config_group(stream, stream->global, &dvd_conf);
if (p->device && p->device[0])
filename = p->device;
else if (p->opts->device && p->opts->device[0])
filename = p->opts->device;
else
filename = DEFAULT_DVD_DEVICE;
if (!new_dvdnav_stream(stream, filename)) {
MP_ERR(stream, "Couldn't open DVD device: %s\n",
filename);
return STREAM_ERROR;
}
if (p->track == TITLE_LONGEST) { // longest
dvdnav_t *dvdnav = priv->dvdnav;
uint64_t best_length = 0;
int best_title = -1;
int32_t num_titles;
if (dvdnav_get_number_of_titles(dvdnav, &num_titles) == DVDNAV_STATUS_OK) {
MP_VERBOSE(stream, "List of available titles:\n");
for (int n = 1; n <= num_titles; n++) {
uint64_t *parts = NULL, duration = 0;
dvdnav_describe_title_chapters(dvdnav, n, &parts, &duration);
if (parts) {
if (duration > best_length) {
best_length = duration;
best_title = n;
}
if (duration > 90000) { // arbitrarily ignore <1s titles
char *time = mp_format_time(duration / 90000, false);
MP_VERBOSE(stream, "title: %3d duration: %s\n",
n - 1, time);
talloc_free(time);
}
free(parts);
}
}
}
p->track = best_title - 1;
MP_INFO(stream, "Selecting title %d.\n", p->track);
}
if (p->track >= 0) {
priv->title = p->track;
if (dvdnav_title_play(priv->dvdnav, p->track + 1) != DVDNAV_STATUS_OK) {
MP_FATAL(stream, "dvdnav_stream, couldn't select title %d, error '%s'\n",
p->track, dvdnav_err_to_string(priv->dvdnav));
return STREAM_UNSUPPORTED;
}
} else {
MP_FATAL(stream, "DVD menu support has been removed.\n");
return STREAM_ERROR;
}
if (p->opts->angle > 1)
dvdnav_angle_change(priv->dvdnav, p->opts->angle);
stream->fill_buffer = fill_buffer;
stream->control = control;
stream->close = stream_dvdnav_close;
stream->demuxer = "+disc";
stream->lavf_type = "mpeg";
return STREAM_OK;
}
static int open_s(stream_t *stream)
{
struct priv *priv = talloc_zero(stream, struct priv);
stream->priv = priv;
bstr title, bdevice;
bstr_split_tok(bstr0(stream->path), "/", &title, &bdevice);
priv->track = TITLE_LONGEST;
if (bstr_equals0(title, "longest") || bstr_equals0(title, "first")) {
priv->track = TITLE_LONGEST;
} else if (bstr_equals0(title, "menu")) {
priv->track = TITLE_MENU;
} else if (title.len) {
bstr rest;
priv->track = bstrtoll(title, &rest, 10);
if (rest.len) {
MP_ERR(stream, "number expected: '%.*s'\n", BSTR_P(rest));
return STREAM_ERROR;
}
}
priv->device = bstrto0(priv, bdevice);
return open_s_internal(stream);
}
const stream_info_t stream_info_dvdnav = {
.name = "dvdnav",
.open = open_s,
.protocols = (const char*const[]){ "dvd", "dvdnav", NULL },
.stream_origin = STREAM_ORIGIN_UNSAFE,
};
static bool check_ifo(const char *path)
{
if (strcasecmp(mp_basename(path), "video_ts.ifo"))
return false;
return dvd_probe(path, ".ifo", "DVDVIDEO-VMG");
}
static int ifo_dvdnav_stream_open(stream_t *stream)
{
struct priv *priv = talloc_zero(stream, struct priv);
stream->priv = priv;
if (!stream->access_references)
goto unsupported;
priv->track = TITLE_LONGEST;
char *path = mp_file_get_path(priv, bstr0(stream->url));
if (!path)
goto unsupported;
// We allow the path to point to a directory containing VIDEO_TS/, a
// directory containing VIDEO_TS.IFO, or that file itself.
if (!check_ifo(path)) {
// On UNIX, just assume the filename is always uppercase.
char *npath = mp_path_join(priv, path, "VIDEO_TS.IFO");
if (!check_ifo(npath)) {
npath = mp_path_join(priv, path, "VIDEO_TS/VIDEO_TS.IFO");
if (!check_ifo(npath))
goto unsupported;
}
path = npath;
}
priv->device = bstrto0(priv, mp_dirname(path));
MP_INFO(stream, ".IFO detected. Redirecting to dvd://\n");
return open_s_internal(stream);
unsupported:
talloc_free(priv);
stream->priv = NULL;
return STREAM_UNSUPPORTED;
}
const stream_info_t stream_info_ifo_dvdnav = {
.name = "ifo_dvdnav",
.open = ifo_dvdnav_stream_open,
.protocols = (const char*const[]){ "file", "", NULL },
.stream_origin = STREAM_ORIGIN_UNSAFE,
};
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