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mpv/stream/stream_dvdnav.c
wm4 92ba630796 demux: remove relative seeking 
Ever since a change in mplayer2 or so, relative seeks were translated to
absolute seeks before sending them to the demuxer in most cases. The
only exception in current mpv is DVD seeking.

Remove the SEEK_ABSOLUTE flag; it's not the implied default. SEEK_FACTOR
is kept, because it's sometimes slightly useful for seeking in things
like transport streams. (And maybe mkv files without duration set?)

DVD seeking is terrible because DVD and libdvdnav are terrible, but
mostly because libdvdnav is terrible. libdvdnav does not expose seeking
with seek tables. (Although I know xbmc/kodi use an undocumented API
that is not declared in the headers by dladdr()ing it - I think the
function is dvdnav_jump_to_sector_by_time().) With the current mpv
policy if not giving a shit about DVD, just revert our half-working seek
hacks and always use dvdnav_time_search(). Relative seeking might get
stuck sometimes; in this case --hr-seek=always is recommended.
2016-02-28 19:28:34 +01:00

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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 <libavutil/common.h>
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
#include <assert.h>
#include <dvdnav/dvdnav.h>
#include "osdep/io.h"
#include "options/options.h"
#include "common/msg.h"
#include "input/input.h"
#include "options/m_option.h"
#include "options/path.h"
#include "osdep/timer.h"
#include "stream.h"
#include "demux/demux.h"
#include "video/out/vo.h"
#include "stream_dvd_common.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;
};
static const struct priv stream_priv_dflts = {
.track = TITLE_LONGEST,
};
#define OPT_BASE_STRUCT struct priv
static const m_option_t stream_opts_fields[] = {
OPT_CHOICE_OR_INT("title", track, 0, 0, 99,
({"menu", TITLE_MENU},
{"longest", TITLE_LONGEST})),
OPT_STRING("device", device, 0),
{0}
};
#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)] : "?")
/**
* \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, char *buf, int max_len)
{
struct priv *priv = s->priv;
dvdnav_t *dvdnav = priv->dvdnav;
if (max_len < 2048)
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_VERBOSE(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;
}
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);
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 = stream->opts->dvd_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(stream_t *stream)
{
struct priv *priv, *p;
priv = p = stream->priv;
char *filename;
if (p->device && p->device[0])
filename = p->device;
else if (stream->opts->dvd_device && stream->opts->dvd_device[0])
filename = stream->opts->dvd_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_UNSUPPORTED;
}
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) {
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;
}
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 (stream->opts->dvd_angle > 1)
dvdnav_angle_change(priv->dvdnav, stream->opts->dvd_angle);
stream->sector_size = 2048;
stream->fill_buffer = fill_buffer;
stream->control = control;
stream->close = stream_dvdnav_close;
stream->type = STREAMTYPE_DVD;
stream->demuxer = "+disc";
stream->lavf_type = "mpeg";
stream->allow_caching = false;
return STREAM_OK;
}
const stream_info_t stream_info_dvdnav = {
.name = "dvdnav",
.open = open_s,
.protocols = (const char*const[]){ "dvd", "dvdnav", NULL },
.priv_size = sizeof(struct priv),
.priv_defaults = &stream_priv_dflts,
.options = stream_opts_fields,
.url_options = (const char*const[]){
"hostname=title",
"filename=device",
NULL
},
};
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_ptrtype(stream, priv);
stream->priv = priv;
*priv = stream_priv_dflts;
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(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 },
};
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