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mpv/stream/stream_bluray.c
wm4 5196b03fb2 player: avoid stalling when starting a network stream 
Starting a network stream could stall by executing uncacheable stream
control requests (STREAM_CTRL_GET_LANG and STREAM_CTRL_GET_DVD_INFO).
Being uncacheable means the player has to wait until the cache is done
reading the current block of data. These requests can't be cached
because they're too complicated, so the only way to avoid them is
special casing the DVD and Bluray streams (which are the only things
which need these requests), and not doing them in other cases.

(This is kind of inelegant, but so is the rest of the DVD/BD code.)
2014-01-14 22:24:07 +01:00

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/*
* Copyright (C) 2010 Benjamin Zores <ben@geexbox.org>
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Blu-ray parser/reader using libbluray
* Use 'git clone git://git.videolan.org/libbluray' to get it.
*
* TODO:
* - Add libbdnav support for menus navigation
* - Add AACS/BD+ protection detection
* - Add descrambled keys database support (KEYDB.cfg)
*
*/
#include <string.h>
#include <assert.h>
#include <libbluray/bluray.h>
#include <libavutil/common.h>
#include "config.h"
#include "talloc.h"
#include "common/common.h"
#include "common/msg.h"
#include "options/m_option.h"
#include "stream.h"
#define BLURAY_SECTOR_SIZE 6144
#define BLURAY_DEFAULT_ANGLE 0
#define BLURAY_DEFAULT_CHAPTER 0
#define BLURAY_DEFAULT_TITLE 0
// 90khz ticks
#define BD_TIMEBASE (90000)
#define BD_TIME_TO_MP(x) ((x) / (double)(BD_TIMEBASE))
#define BD_TIME_FROM_MP(x) ((uint64_t)(x * BD_TIMEBASE))
char *bluray_device = NULL;
int bluray_angle = 0;
struct bluray_priv_s {
BLURAY *bd;
int num_titles;
int current_angle;
int current_title;
int cfg_title;
char *cfg_device;
};
static struct bluray_priv_s bluray_stream_priv_dflts = {
.cfg_title = BLURAY_DEFAULT_TITLE
};
#define OPT_BASE_STRUCT struct bluray_priv_s
static const m_option_t bluray_stream_opts_fields[] = {
OPT_INTRANGE("title", cfg_title, 0, 0, 99999),
OPT_STRING("device", cfg_device, 0),
{0}
};
static void bluray_stream_close(stream_t *s)
{
struct bluray_priv_s *b = s->priv;
bd_close(b->bd);
}
static int bluray_stream_seek(stream_t *s, int64_t pos)
{
struct bluray_priv_s *b = s->priv;
int64_t p;
p = bd_seek(b->bd, pos);
if (p == -1)
return 0;
return 1;
}
static int bluray_stream_fill_buffer(stream_t *s, char *buf, int len)
{
struct bluray_priv_s *b = s->priv;
return bd_read(b->bd, buf, len);
}
static int bluray_stream_control(stream_t *s, int cmd, void *arg)
{
struct bluray_priv_s *b = s->priv;
switch (cmd) {
case STREAM_CTRL_GET_NUM_CHAPTERS: {
BLURAY_TITLE_INFO *ti;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
*((unsigned int *) arg) = ti->chapter_count;
bd_free_title_info(ti);
return 1;
}
case STREAM_CTRL_GET_CHAPTER_TIME: {
BLURAY_TITLE_INFO *ti;
int chapter = *(double *)arg;
double time = MP_NOPTS_VALUE;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
if (chapter >= 0 || chapter < ti->chapter_count) {
time = BD_TIME_TO_MP(ti->chapters[chapter].start);
}
bd_free_title_info(ti);
if (time != MP_NOPTS_VALUE) {
*(double *)arg = time;
return STREAM_OK;
}
return STREAM_ERROR;
}
case STREAM_CTRL_GET_CURRENT_TITLE: {
*((unsigned int *) arg) = b->current_title;
return 1;
}
case STREAM_CTRL_GET_NUM_TITLES: {
*((unsigned int *)arg) = b->num_titles;
return 1;
}
case STREAM_CTRL_GET_CURRENT_CHAPTER: {
*((unsigned int *) arg) = bd_get_current_chapter(b->bd);
return 1;
}
case STREAM_CTRL_SEEK_TO_CHAPTER: {
BLURAY_TITLE_INFO *ti;
int chapter = *((unsigned int *) arg);
int64_t pos;
int r;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
if (chapter < 0 || chapter > ti->chapter_count) {
bd_free_title_info(ti);
return STREAM_UNSUPPORTED;
}
pos = bd_chapter_pos(b->bd, chapter);
r = bluray_stream_seek(s, pos);
bd_free_title_info(ti);
return r ? 1 : STREAM_UNSUPPORTED;
}
case STREAM_CTRL_GET_TIME_LENGTH: {
BLURAY_TITLE_INFO *ti;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
*((double *) arg) = BD_TIME_TO_MP(ti->duration);
return STREAM_OK;
}
case STREAM_CTRL_GET_CURRENT_TIME: {
*((double *) arg) = BD_TIME_TO_MP(bd_tell_time(b->bd));
return STREAM_OK;
}
case STREAM_CTRL_SEEK_TO_TIME: {
double pts = *((double *) arg);
bd_seek_time(b->bd, BD_TIME_FROM_MP(pts));
// Reset mpv internal stream position.
stream_seek(s, bd_tell(b->bd));
// API makes it hard to determine seeking success
return STREAM_OK;
}
case STREAM_CTRL_GET_NUM_ANGLES: {
BLURAY_TITLE_INFO *ti;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
*((int *) arg) = ti->angle_count;
bd_free_title_info(ti);
return 1;
}
case STREAM_CTRL_GET_ANGLE: {
*((int *) arg) = b->current_angle;
return 1;
}
case STREAM_CTRL_SET_ANGLE: {
BLURAY_TITLE_INFO *ti;
int angle = *((int *) arg);
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
if (angle < 0 || angle > ti->angle_count) {
bd_free_title_info(ti);
return STREAM_UNSUPPORTED;
}
b->current_angle = angle;
bd_seamless_angle_change(b->bd, angle);
bd_free_title_info(ti);
return 1;
}
case STREAM_CTRL_GET_LANG: {
struct stream_lang_req *req = arg;
BLURAY_TITLE_INFO *ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (ti->clip_count) {
BLURAY_STREAM_INFO *si = NULL;
int count = 0;
switch (req->type) {
case STREAM_AUDIO:
count = ti->clips[0].audio_stream_count;
si = ti->clips[0].audio_streams;
break;
case STREAM_SUB:
count = ti->clips[0].pg_stream_count;
si = ti->clips[0].pg_streams;
break;
}
for (int n = 0; n < count; n++) {
BLURAY_STREAM_INFO *i = &si[n];
if (i->pid == req->id) {
snprintf(req->name, sizeof(req->name), "%.4s", i->lang);
bd_free_title_info(ti);
return STREAM_OK;
}
}
}
bd_free_title_info(ti);
return STREAM_ERROR;
}
case STREAM_CTRL_GET_START_TIME:
{
*((double *)arg) = 0;
return STREAM_OK;
}
case STREAM_CTRL_MANAGES_TIMELINE:
return STREAM_OK;
default:
break;
}
return STREAM_UNSUPPORTED;
}
static int bluray_stream_open(stream_t *s, int mode)
{
struct bluray_priv_s *b = s->priv;
BLURAY_TITLE_INFO *info = NULL;
BLURAY *bd;
int title, title_guess;
uint64_t title_size;
unsigned int angle = 0;
uint64_t max_duration = 0;
char *device = NULL;
int i;
/* find the requested device */
if (b->cfg_device)
device = b->cfg_device;
else if (bluray_device)
device = bluray_device;
if (!device) {
MP_ERR(s, "No Blu-ray device/location was specified ...\n");
return STREAM_UNSUPPORTED;
}
/* open device */
bd = bd_open(device, NULL);
if (!bd) {
MP_ERR(s, "Couldn't open Blu-ray device: %s\n",
device);
return STREAM_UNSUPPORTED;
}
/* check for available titles on disc */
b->num_titles = bd_get_titles(bd, TITLES_RELEVANT, angle);
MP_SMODE(s, "ID_BLURAY_TITLES=%d\n", b->num_titles);
if (!b->num_titles) {
MP_ERR(s, "Can't find any Blu-ray-compatible title here.\n");
bd_close(bd);
return STREAM_UNSUPPORTED;
}
/* parse titles information */
title_guess = BLURAY_DEFAULT_TITLE;
for (i = 0; i < b->num_titles; i++) {
BLURAY_TITLE_INFO *ti;
int sec, msec;
ti = bd_get_title_info(bd, i, angle);
if (!ti)
continue;
sec = ti->duration / 90000;
msec = (ti->duration - sec) % 1000;
MP_SMODE(s, "ID_BLURAY_TITLE_%d_CHAPTERS=%d\n", i + 1, ti->chapter_count);
MP_SMODE(s, "ID_BLURAY_TITLE_%d_ANGLE=%d\n", i + 1, ti->angle_count);
MP_SMODE(s, "ID_BLURAY_TITLE_%d_LENGTH=%d.%03d\n", i + 1, sec, msec);
/* try to guess which title may contain the main movie */
if (ti->duration > max_duration) {
max_duration = ti->duration;
title_guess = i;
}
bd_free_title_info(ti);
}
/* Select current title */
title = b->cfg_title ? b->cfg_title - 1: title_guess;
title = FFMIN(title, b->num_titles - 1);
bd_select_title(bd, title);
title_size = bd_get_title_size(bd);
MP_SMODE(s, "ID_BLURAY_CURRENT_TITLE=%d\n", title + 1);
/* Get current title information */
info = bd_get_title_info(bd, title, angle);
if (!info)
goto err_no_info;
/* Select angle */
angle = bluray_angle ? bluray_angle : BLURAY_DEFAULT_ANGLE;
angle = FFMIN(angle, info->angle_count);
if (angle)
bd_select_angle(bd, angle);
MP_SMODE(s, "ID_BLURAY_CURRENT_ANGLE=%d\n", angle + 1);
bd_free_title_info(info);
err_no_info:
s->fill_buffer = bluray_stream_fill_buffer;
s->seek = bluray_stream_seek;
s->close = bluray_stream_close;
s->control = bluray_stream_control;
b->bd = bd;
b->current_angle = angle;
b->current_title = title;
s->type = STREAMTYPE_BLURAY;
s->end_pos = title_size;
s->sector_size = BLURAY_SECTOR_SIZE;
s->flags = MP_STREAM_SEEK;
s->priv = b;
MP_VERBOSE(s, "Blu-ray successfully opened.\n");
return STREAM_OK;
}
const stream_info_t stream_info_bluray = {
.name = "bd",
.open = bluray_stream_open,
.protocols = (const char*[]){ "bd", "br", "bluray", NULL },
.priv_defaults = &bluray_stream_priv_dflts,
.priv_size = sizeof(struct bluray_priv_s),
.options = bluray_stream_opts_fields,
.url_options = (const char*[]){
"hostname=title",
"filename=device",
NULL
},
};
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