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mpv/sub/vobsub.c

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/*
* Some code freely inspired from VobSub <URL:http://vobsub.edensrising.com>,
* with kind permission from Gabest <gabest@freemail.hu>
*
* 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.
*/
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "config.h"
#include "core/mp_common.h"
#include "vobsub.h"
#include "spudec.h"
#include "core/mp_msg.h"
#include "core/path.h"
#include "libavutil/common.h"
extern int vobsub_id;
// Record the original -vobsubid set by commandline, since vobsub_id will be
// overridden if slang match any of vobsub streams.
static int vobsubid = -2;
typedef FILE rar_stream_t;
#define rar_open fopen
#define rar_close fclose
#define rar_eof feof
#define rar_tell ftell
#define rar_seek fseek
#define rar_getc getc
#define rar_read fread
/**********************************************************************/
static ssize_t vobsub_getline(char **lineptr, size_t *n, rar_stream_t *stream)
{
size_t res = 0;
int c;
if (*lineptr == NULL) {
*lineptr = malloc(4096);
if (*lineptr)
*n = 4096;
} else if (*n == 0) {
char *tmp = realloc(*lineptr, 4096);
if (tmp) {
*lineptr = tmp;
*n = 4096;
}
}
if (*lineptr == NULL || *n == 0)
return -1;
for (c = rar_getc(stream); c != EOF; c = rar_getc(stream)) {
if (res + 1 >= *n) {
char *tmp = realloc(*lineptr, *n * 2);
if (tmp == NULL)
return -1;
*lineptr = tmp;
*n *= 2;
}
(*lineptr)[res++] = c;
if (c == '\n') {
(*lineptr)[res] = 0;
return res;
}
}
if (res == 0)
return -1;
(*lineptr)[res] = 0;
return res;
}
/**********************************************************************
* MPEG parsing
**********************************************************************/
typedef struct {
rar_stream_t *stream;
unsigned int pts;
int aid;
unsigned char *packet;
unsigned int packet_reserve;
unsigned int packet_size;
int padding_was_here;
int merge;
} mpeg_t;
static mpeg_t *mpeg_open(const char *filename)
{
mpeg_t *res = malloc(sizeof(mpeg_t));
int err = res == NULL;
if (!err) {
res->pts = 0;
res->aid = -1;
res->packet = NULL;
res->packet_size = 0;
res->packet_reserve = 0;
res->padding_was_here = 1;
res->merge = 0;
res->stream = rar_open(filename, "rb");
err = res->stream == NULL;
if (err)
perror("fopen Vobsub file failed");
if (err)
free(res);
}
return err ? NULL : res;
}
static void mpeg_free(mpeg_t *mpeg)
{
free(mpeg->packet);
if (mpeg->stream)
rar_close(mpeg->stream);
free(mpeg);
}
static int mpeg_eof(mpeg_t *mpeg)
{
return rar_eof(mpeg->stream);
}
static off_t mpeg_tell(mpeg_t *mpeg)
{
return rar_tell(mpeg->stream);
}
static int mpeg_run(mpeg_t *mpeg)
{
unsigned int len, idx, version;
int c;
/* Goto start of a packet, it starts with 0x000001?? */
const unsigned char wanted[] = { 0, 0, 1 };
unsigned char buf[5];
mpeg->aid = -1;
mpeg->packet_size = 0;
if (rar_read(buf, 4, 1, mpeg->stream) != 1)
return -1;
while (memcmp(buf, wanted, sizeof(wanted)) != 0) {
c = rar_getc(mpeg->stream);
if (c < 0)
return -1;
memmove(buf, buf + 1, 3);
buf[3] = c;
}
switch (buf[3]) {
case 0xb9: /* System End Code */
break;
case 0xba: /* Packet start code */
c = rar_getc(mpeg->stream);
if (c < 0)
return -1;
if ((c & 0xc0) == 0x40)
version = 4;
else if ((c & 0xf0) == 0x20)
version = 2;
else {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Unsupported MPEG version: 0x%02x\n", c);
return -1;
}
if (version == 4) {
if (rar_seek(mpeg->stream, 9, SEEK_CUR))
return -1;
} else if (version == 2) {
if (rar_seek(mpeg->stream, 7, SEEK_CUR))
return -1;
} else
abort();
if (!mpeg->padding_was_here)
mpeg->merge = 1;
break;
case 0xbd: /* packet */
if (rar_read(buf, 2, 1, mpeg->stream) != 1)
return -1;
mpeg->padding_was_here = 0;
len = buf[0] << 8 | buf[1];
idx = mpeg_tell(mpeg);
c = rar_getc(mpeg->stream);
if (c < 0)
return -1;
if ((c & 0xC0) == 0x40) { /* skip STD scale & size */
if (rar_getc(mpeg->stream) < 0)
return -1;
c = rar_getc(mpeg->stream);
if (c < 0)
return -1;
}
if ((c & 0xf0) == 0x20) { /* System-1 stream timestamp */
/* Do we need this? */
abort();
} else if ((c & 0xf0) == 0x30) {
/* Do we need this? */
abort();
} else if ((c & 0xc0) == 0x80) { /* System-2 (.VOB) stream */
unsigned int pts_flags, hdrlen, dataidx;
c = rar_getc(mpeg->stream);
if (c < 0)
return -1;
pts_flags = c;
c = rar_getc(mpeg->stream);
if (c < 0)
return -1;
hdrlen = c;
dataidx = mpeg_tell(mpeg) + hdrlen;
if (dataidx > idx + len) {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "Invalid header length: %d (total length: %d, idx: %d, dataidx: %d)\n",
hdrlen, len, idx, dataidx);
return -1;
}
if ((pts_flags & 0xc0) == 0x80) {
if (rar_read(buf, 5, 1, mpeg->stream) != 1)
return -1;
if (!(((buf[0] & 0xf0) == 0x20) && (buf[0] & 1) && (buf[2] & 1) && (buf[4] & 1))) {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "vobsub PTS error: 0x%02x %02x%02x %02x%02x \n",
buf[0], buf[1], buf[2], buf[3], buf[4]);
mpeg->pts = 0;
} else
mpeg->pts = ((buf[0] & 0x0e) << 29 | buf[1] << 22 | (buf[2] & 0xfe) << 14
| buf[3] << 7 | (buf[4] >> 1));
} else /* if ((pts_flags & 0xc0) == 0xc0) */ {
/* what's this? */
/* abort(); */
}
rar_seek(mpeg->stream, dataidx, SEEK_SET);
mpeg->aid = rar_getc(mpeg->stream);
if (mpeg->aid < 0) {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "Bogus aid %d\n", mpeg->aid);
return -1;
}
mpeg->packet_size = len - ((unsigned int) mpeg_tell(mpeg) - idx);
if (mpeg->packet_reserve < mpeg->packet_size) {
free(mpeg->packet);
mpeg->packet = malloc(mpeg->packet_size);
if (mpeg->packet)
mpeg->packet_reserve = mpeg->packet_size;
}
if (mpeg->packet == NULL) {
mp_msg(MSGT_VOBSUB, MSGL_FATAL, "malloc failure");
mpeg->packet_reserve = 0;
mpeg->packet_size = 0;
return -1;
}
if (rar_read(mpeg->packet, mpeg->packet_size, 1, mpeg->stream) != 1) {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "fread failure");
mpeg->packet_size = 0;
return -1;
}
idx = len;
}
break;
case 0xbe: /* Padding */
if (rar_read(buf, 2, 1, mpeg->stream) != 1)
return -1;
len = buf[0] << 8 | buf[1];
if (len > 0 && rar_seek(mpeg->stream, len, SEEK_CUR))
return -1;
mpeg->padding_was_here = 1;
break;
default:
if (0xc0 <= buf[3] && buf[3] < 0xf0) {
/* MPEG audio or video */
if (rar_read(buf, 2, 1, mpeg->stream) != 1)
return -1;
len = buf[0] << 8 | buf[1];
if (len > 0 && rar_seek(mpeg->stream, len, SEEK_CUR))
return -1;
} else {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "unknown header 0x%02X%02X%02X%02X\n",
buf[0], buf[1], buf[2], buf[3]);
return -1;
}
}
return 0;
}
/**********************************************************************
* Packet queue
**********************************************************************/
typedef struct {
unsigned int pts100;
off_t filepos;
unsigned int size;
unsigned char *data;
} packet_t;
typedef struct {
char *id;
packet_t *packets;
unsigned int packets_reserve;
unsigned int packets_size;
unsigned int current_index;
} packet_queue_t;
static void packet_construct(packet_t *pkt)
{
pkt->pts100 = 0;
pkt->filepos = 0;
pkt->size = 0;
pkt->data = NULL;
}
static void packet_destroy(packet_t *pkt)
{
free(pkt->data);
}
static void packet_queue_construct(packet_queue_t *queue)
{
queue->id = NULL;
queue->packets = NULL;
queue->packets_reserve = 0;
queue->packets_size = 0;
queue->current_index = 0;
}
static void packet_queue_destroy(packet_queue_t *queue)
{
if (queue->packets) {
while (queue->packets_size--)
packet_destroy(queue->packets + queue->packets_size);
free(queue->packets);
}
return;
}
/* Make sure there is enough room for needed_size packets in the
packet queue. */
static int packet_queue_ensure(packet_queue_t *queue, unsigned int needed_size)
{
if (queue->packets_reserve < needed_size) {
if (queue->packets) {
packet_t *tmp = realloc(queue->packets, 2 * queue->packets_reserve * sizeof(packet_t));
if (tmp == NULL) {
mp_msg(MSGT_VOBSUB, MSGL_FATAL, "realloc failure");
return -1;
}
queue->packets = tmp;
queue->packets_reserve *= 2;
} else {
queue->packets = malloc(sizeof(packet_t));
if (queue->packets == NULL) {
mp_msg(MSGT_VOBSUB, MSGL_FATAL, "malloc failure");
return -1;
}
queue->packets_reserve = 1;
}
}
return 0;
}
/* add one more packet */
static int packet_queue_grow(packet_queue_t *queue)
{
if (packet_queue_ensure(queue, queue->packets_size + 1) < 0)
return -1;
packet_construct(queue->packets + queue->packets_size);
++queue->packets_size;
return 0;
}
/* insert a new packet, duplicating pts from the current one */
static int packet_queue_insert(packet_queue_t *queue)
{
packet_t *pkts;
if (packet_queue_ensure(queue, queue->packets_size + 1) < 0)
return -1;
/* XXX packet_size does not reflect the real thing here, it will be updated a bit later */
memmove(queue->packets + queue->current_index + 2,
queue->packets + queue->current_index + 1,
sizeof(packet_t) * (queue->packets_size - queue->current_index - 1));
pkts = queue->packets + queue->current_index;
++queue->packets_size;
++queue->current_index;
packet_construct(pkts + 1);
pkts[1].pts100 = pkts[0].pts100;
pkts[1].filepos = pkts[0].filepos;
return 0;
}
/**********************************************************************
* Vobsub
**********************************************************************/
typedef struct {
unsigned int palette[16];
int delay;
unsigned int have_palette;
unsigned int orig_frame_width, orig_frame_height;
unsigned int origin_x, origin_y;
/* index */
packet_queue_t *spu_streams;
unsigned int spu_streams_size;
unsigned int spu_streams_current;
unsigned int spu_valid_streams_size;
} vobsub_t;
/* Make sure that the spu stream idx exists. */
static int vobsub_ensure_spu_stream(vobsub_t *vob, unsigned int index)
{
if (index >= vob->spu_streams_size) {
/* This is a new stream */
if (vob->spu_streams) {
packet_queue_t *tmp = realloc(vob->spu_streams, (index + 1) * sizeof(packet_queue_t));
if (tmp == NULL) {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "vobsub_ensure_spu_stream: realloc failure");
return -1;
}
vob->spu_streams = tmp;
} else {
vob->spu_streams = malloc((index + 1) * sizeof(packet_queue_t));
if (vob->spu_streams == NULL) {
mp_msg(MSGT_VOBSUB, MSGL_ERR, "vobsub_ensure_spu_stream: malloc failure");
return -1;
}
}
while (vob->spu_streams_size <= index) {
packet_queue_construct(vob->spu_streams + vob->spu_streams_size);
++vob->spu_streams_size;
}
}
return 0;
}
static int vobsub_add_id(vobsub_t *vob, const char *id, size_t idlen,
const unsigned int index)
{
if (vobsub_ensure_spu_stream(vob, index) < 0)
return -1;
if (id && idlen) {
free(vob->spu_streams[index].id);
vob->spu_streams[index].id = malloc(idlen + 1);
if (vob->spu_streams[index].id == NULL) {
mp_msg(MSGT_VOBSUB, MSGL_FATAL, "vobsub_add_id: malloc failure");
return -1;
}
vob->spu_streams[index].id[idlen] = 0;
memcpy(vob->spu_streams[index].id, id, idlen);
}
vob->spu_streams_current = index;
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VOBSUB_ID=%d\n", index);
if (id && idlen)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VSID_%d_LANG=%s\n", index, vob->spu_streams[index].id);
mp_msg(MSGT_VOBSUB, MSGL_V, "[vobsub] subtitle (vobsubid): %d language %s\n",
index, vob->spu_streams[index].id);
return 0;
}
static int vobsub_add_timestamp(vobsub_t *vob, off_t filepos, int ms)
{
packet_queue_t *queue;
packet_t *pkt;
if (vob->spu_streams == 0) {
mp_msg(MSGT_VOBSUB, MSGL_WARN, "[vobsub] warning, binning some index entries. Check your index file\n");
return -1;
}
queue = vob->spu_streams + vob->spu_streams_current;
if (packet_queue_grow(queue) >= 0) {
pkt = queue->packets + (queue->packets_size - 1);
pkt->filepos = filepos;
pkt->pts100 = ms < 0 ? UINT_MAX : (unsigned int)ms * 90;
return 0;
}
return -1;
}
static int vobsub_parse_id(vobsub_t *vob, const char *line)
{
// id: xx, index: n
size_t idlen;
const char *p, *q;
p = line;
while (isspace(*p))
++p;
q = p;
while (isalpha(*q))
++q;
idlen = q - p;
if (idlen == 0)
return -1;
++q;
while (isspace(*q))
++q;
if (strncmp("index:", q, 6))
return -1;
q += 6;
while (isspace(*q))
++q;
if (!isdigit(*q))
return -1;
return vobsub_add_id(vob, p, idlen, atoi(q));
}
static int vobsub_parse_timestamp(vobsub_t *vob, const char *line)
{
int h, m, s, ms;
int64_t filepos;
if (sscanf(line, " %02d:%02d:%02d:%03d, filepos: %09"SCNx64,
&h, &m, &s, &ms, &filepos) != 5)
return -1;
return vobsub_add_timestamp(vob, filepos, vob->delay + ms + 1000 * (s + 60 * (m + 60 * h)));
}
static int vobsub_parse_origin(vobsub_t *vob, const char *line)
{
// org: X,Y
unsigned x, y;
if (sscanf(line, " %u,%u", &x, &y) == 2) {
vob->origin_x = x;
vob->origin_y = y;
return 0;
}
return -1;
}
unsigned int vobsub_palette_to_yuv(unsigned int pal)
{
int r, g, b, y, u, v;
// Palette in idx file is not rgb value, it was calculated by wrong formula.
// Here's reversed formula of the one used to generate palette in idx file.
r = pal >> 16 & 0xff;
g = pal >> 8 & 0xff;
b = pal & 0xff;
y = av_clip_uint8( 0.1494 * r + 0.6061 * g + 0.2445 * b);
u = av_clip_uint8( 0.6066 * r - 0.4322 * g - 0.1744 * b + 128);
v = av_clip_uint8(-0.08435 * r - 0.3422 * g + 0.4266 * b + 128);
y = y * 219 / 255 + 16;
return y << 16 | u << 8 | v;
}
unsigned int vobsub_rgb_to_yuv(unsigned int rgb)
{
int r, g, b, y, u, v;
r = rgb >> 16 & 0xff;
g = rgb >> 8 & 0xff;
b = rgb & 0xff;
y = ( 0.299 * r + 0.587 * g + 0.114 * b) * 219 / 255 + 16.5;
u = (-0.16874 * r - 0.33126 * g + 0.5 * b) * 224 / 255 + 128.5;
v = ( 0.5 * r - 0.41869 * g - 0.08131 * b) * 224 / 255 + 128.5;
return y << 16 | u << 8 | v;
}
static int vobsub_parse_delay(vobsub_t *vob, const char *line)
{
int h, m, s, ms;
int forward = 1;
if (*(line + 7) == '+') {
forward = 1;
line++;
} else if (*(line + 7) == '-') {
forward = -1;
line++;
}
mp_msg(MSGT_SPUDEC, MSGL_V, "forward=%d", forward);
h = atoi(line + 7);
mp_msg(MSGT_VOBSUB, MSGL_V, "h=%d,", h);
m = atoi(line + 10);
mp_msg(MSGT_VOBSUB, MSGL_V, "m=%d,", m);
s = atoi(line + 13);
mp_msg(MSGT_VOBSUB, MSGL_V, "s=%d,", s);
ms = atoi(line + 16);
mp_msg(MSGT_VOBSUB, MSGL_V, "ms=%d", ms);
vob->delay = (ms + 1000 * (s + 60 * (m + 60 * h))) * forward;
return 0;
}
static int vobsub_set_lang(const char *line)
{
if (vobsub_id == -1)
vobsub_id = atoi(line + 8);
return 0;
}
static int vobsub_parse_one_line(vobsub_t *vob, rar_stream_t *fd,
unsigned char **extradata,
unsigned int *extradata_len)
{
ssize_t line_size;
int res = -1;
size_t line_reserve = 0;
char *line = NULL;
do {
line_size = vobsub_getline(&line, &line_reserve, fd);
if (line_size < 0 || line_size > 1000000 ||
*extradata_len+line_size > 10000000) {
break;
}
*extradata = realloc(*extradata, *extradata_len+line_size+1);
memcpy(*extradata+*extradata_len, line, line_size);
*extradata_len += line_size;
(*extradata)[*extradata_len] = 0;
if (*line == 0 || *line == '\r' || *line == '\n' || *line == '#')
continue;
else if (strncmp("langidx:", line, 8) == 0)
res = vobsub_set_lang(line);
else if (strncmp("delay:", line, 6) == 0)
res = vobsub_parse_delay(vob, line);
else if (strncmp("id:", line, 3) == 0)
res = vobsub_parse_id(vob, line + 3);
else if (strncmp("org:", line, 4) == 0)
res = vobsub_parse_origin(vob, line + 4);
else if (strncmp("timestamp:", line, 10) == 0)
res = vobsub_parse_timestamp(vob, line + 10);
else {
mp_msg(MSGT_VOBSUB, MSGL_V, "vobsub: ignoring %s", line);
continue;
}
if (res < 0)
mp_msg(MSGT_VOBSUB, MSGL_ERR, "ERROR in %s", line);
break;
} while (1);
free(line);
return res;
}
int vobsub_parse_ifo(void* this, const char *const name, unsigned int *palette,
unsigned int *width, unsigned int *height, int force,
int sid, char *langid)
{
vobsub_t *vob = this;
int res = -1;
rar_stream_t *fd = rar_open(name, "rb");
if (fd == NULL) {
if (force)
mp_msg(MSGT_VOBSUB, MSGL_WARN, "VobSub: Can't open IFO file\n");
} else {
// parse IFO header
unsigned char block[0x800];
const char *const ifo_magic = "DVDVIDEO-VTS";
if (rar_read(block, sizeof(block), 1, fd) != 1) {
if (force)
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't read IFO header\n");
} else if (memcmp(block, ifo_magic, strlen(ifo_magic) + 1))
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Bad magic in IFO header\n");
else {
unsigned long pgci_sector = block[0xcc] << 24 | block[0xcd] << 16
| block[0xce] << 8 | block[0xcf];
int standard = (block[0x200] & 0x30) >> 4;
int resolution = (block[0x201] & 0x0c) >> 2;
*height = standard ? 576 : 480;
*width = 0;
switch (resolution) {
case 0x0:
*width = 720;
break;
case 0x1:
*width = 704;
break;
case 0x2:
*width = 352;
break;
case 0x3:
*width = 352;
*height /= 2;
break;
default:
mp_msg(MSGT_VOBSUB, MSGL_WARN, "Vobsub: Unknown resolution %d \n", resolution);
}
if (langid && 0 <= sid && sid < 32) {
unsigned char *tmp = block + 0x256 + sid * 6 + 2;
langid[0] = tmp[0];
langid[1] = tmp[1];
langid[2] = 0;
}
if (rar_seek(fd, pgci_sector * sizeof(block), SEEK_SET)
|| rar_read(block, sizeof(block), 1, fd) != 1)
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't read IFO PGCI\n");
else {
unsigned long idx;
unsigned long pgc_offset = block[0xc] << 24 | block[0xd] << 16
| block[0xe] << 8 | block[0xf];
for (idx = 0; idx < 16; ++idx) {
unsigned char *p = block + pgc_offset + 0xa4 + 4 * idx;
palette[idx] = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
}
if (vob)
vob->have_palette = 1;
res = 0;
}
}
rar_close(fd);
}
return res;
}
void *vobsub_open(const char *const name, const char *const ifo,
const int force, void** spu)
{
unsigned char *extradata = NULL;
unsigned int extradata_len = 0;
vobsub_t *vob = calloc(1, sizeof(vobsub_t));
if (spu)
*spu = NULL;
if (vobsubid == -2)
vobsubid = vobsub_id;
if (vob) {
char *buf;
buf = malloc(strlen(name) + 5);
if (buf) {
rar_stream_t *fd;
mpeg_t *mpg;
/* read in the info file */
if (!ifo) {
strcpy(buf, name);
strcat(buf, ".ifo");
vobsub_parse_ifo(vob, buf, vob->palette, &vob->orig_frame_width, &vob->orig_frame_height, force, -1, NULL);
} else
vobsub_parse_ifo(vob, ifo, vob->palette, &vob->orig_frame_width, &vob->orig_frame_height, force, -1, NULL);
/* read in the index */
strcpy(buf, name);
strcat(buf, ".idx");
fd = rar_open(buf, "rb");
if (fd == NULL) {
if (force)
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't open IDX file\n");
else {
free(buf);
free(vob);
return NULL;
}
} else {
while (vobsub_parse_one_line(vob, fd, &extradata, &extradata_len) >= 0)
/* NOOP */ ;
rar_close(fd);
}
if (spu)
*spu = spudec_new_scaled(vob->palette, vob->orig_frame_width, vob->orig_frame_height, extradata, extradata_len);
free(extradata);
/* read the indexed mpeg_stream */
strcpy(buf, name);
strcat(buf, ".sub");
mpg = mpeg_open(buf);
if (mpg == NULL) {
if (force)
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't open SUB file\n");
else {
free(buf);
free(vob);
return NULL;
}
} else {
long last_pts_diff = 0;
while (!mpeg_eof(mpg)) {
off_t pos = mpeg_tell(mpg);
if (mpeg_run(mpg) < 0) {
if (!mpeg_eof(mpg))
mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: mpeg_run error\n");
break;
}
if (mpg->packet_size) {
if ((mpg->aid & 0xe0) == 0x20) {
unsigned int sid = mpg->aid & 0x1f;
if (vobsub_ensure_spu_stream(vob, sid) >= 0) {
packet_queue_t *queue = vob->spu_streams + sid;
/* get the packet to fill */
if (queue->packets_size == 0 && packet_queue_grow(queue) < 0)
abort();
while (queue->current_index + 1 < queue->packets_size
&& queue->packets[queue->current_index + 1].filepos <= pos)
++queue->current_index;
if (queue->current_index < queue->packets_size) {
packet_t *pkt;
if (queue->packets[queue->current_index].data) {
/* insert a new packet and fix the PTS ! */
packet_queue_insert(queue);
queue->packets[queue->current_index].pts100 =
mpg->pts + last_pts_diff;
}
pkt = queue->packets + queue->current_index;
if (pkt->pts100 != UINT_MAX) {
if (queue->packets_size > 1)
last_pts_diff = pkt->pts100 - mpg->pts;
else
pkt->pts100 = mpg->pts;
if (mpg->merge && queue->current_index > 0) {
packet_t *last = &queue->packets[queue->current_index - 1];
pkt->pts100 = last->pts100;
}
mpg->merge = 0;
/* FIXME: should not use mpg_sub internal informations, make a copy */
pkt->data = mpg->packet;
pkt->size = mpg->packet_size;
mpg->packet = NULL;
mpg->packet_reserve = 0;
mpg->packet_size = 0;
}
}
} else
mp_msg(MSGT_VOBSUB, MSGL_WARN, "don't know what to do with subtitle #%u\n", sid);
}
}
}
vob->spu_streams_current = vob->spu_streams_size;
while (vob->spu_streams_current-- > 0) {
vob->spu_streams[vob->spu_streams_current].current_index = 0;
if (vobsubid == vob->spu_streams_current ||
vob->spu_streams[vob->spu_streams_current].packets_size > 0)
++vob->spu_valid_streams_size;
}
mpeg_free(mpg);
}
free(buf);
}
}
return vob;
}
void vobsub_close(void *this)
{
vobsub_t *vob = this;
if (vob->spu_streams) {
while (vob->spu_streams_size--)
packet_queue_destroy(vob->spu_streams + vob->spu_streams_size);
free(vob->spu_streams);
}
free(vob);
}
unsigned int vobsub_get_indexes_count(void *vobhandle)
{
vobsub_t *vob = vobhandle;
return vob->spu_valid_streams_size;
}
char *vobsub_get_id(void *vobhandle, unsigned int index)
{
vobsub_t *vob = vobhandle;
return (index < vob->spu_streams_size) ? vob->spu_streams[index].id : NULL;
}
int vobsub_get_id_by_index(void *vobhandle, unsigned int index)
{
vobsub_t *vob = vobhandle;
int i, j;
if (vob == NULL)
return -1;
for (i = 0, j = 0; i < vob->spu_streams_size; ++i)
if (i == vobsubid || vob->spu_streams[i].packets_size > 0) {
if (j == index)
return i;
++j;
}
return -1;
}
int vobsub_get_index_by_id(void *vobhandle, int id)
{
vobsub_t *vob = vobhandle;
int i, j;
if (vob == NULL || id < 0 || id >= vob->spu_streams_size)
return -1;
if (id != vobsubid && !vob->spu_streams[id].packets_size)
return -1;
for (i = 0, j = 0; i < id; ++i)
if (i == vobsubid || vob->spu_streams[i].packets_size > 0)
++j;
return j;
}
int vobsub_set_from_lang(void *vobhandle, char **lang)
{
int i;
vobsub_t *vob= vobhandle;
if (!lang)
goto end;
for (int n = 0; lang[n]; n++) {
for (i = 0; i < vob->spu_streams_size; i++)
if (vob->spu_streams[i].id)
if ((strncmp(vob->spu_streams[i].id, lang[n], 2) == 0)) {
vobsub_id = i;
mp_msg(MSGT_VOBSUB, MSGL_INFO, "Selected VOBSUB language: %d language: %s\n", i, vob->spu_streams[i].id);
return 0;
}
}
end:
mp_msg(MSGT_VOBSUB, MSGL_WARN, "No matching VOBSUB language found!\n");
return -1;
}
/// make sure we seek to the first packet of packets having same pts values.
static void vobsub_queue_reseek(packet_queue_t *queue, unsigned int pts100)
{
int reseek_count = 0;
unsigned int lastpts = 0;
if (queue->current_index > 0
&& (queue->packets[queue->current_index].pts100 == UINT_MAX
|| queue->packets[queue->current_index].pts100 > pts100)) {
// possible pts seek previous, try to check it.
int i = 1;
while (queue->current_index >= i
&& queue->packets[queue->current_index-i].pts100 == UINT_MAX)
++i;
if (queue->current_index >= i
&& queue->packets[queue->current_index-i].pts100 > pts100)
// pts seek previous confirmed, reseek from beginning
queue->current_index = 0;
}
while (queue->current_index < queue->packets_size
&& queue->packets[queue->current_index].pts100 <= pts100) {
lastpts = queue->packets[queue->current_index].pts100;
++queue->current_index;
++reseek_count;
}
while (reseek_count-- && --queue->current_index) {
if (queue->packets[queue->current_index-1].pts100 != UINT_MAX &&
queue->packets[queue->current_index-1].pts100 != lastpts)
break;
}
}
int vobsub_get_packet(void *vobhandle, float pts, void** data, int* timestamp)
{
vobsub_t *vob = vobhandle;
unsigned int pts100 = 90000 * pts;
if (vob->spu_streams && 0 <= vobsub_id && (unsigned) vobsub_id < vob->spu_streams_size) {
packet_queue_t *queue = vob->spu_streams + vobsub_id;
vobsub_queue_reseek(queue, pts100);
while (queue->current_index < queue->packets_size) {
packet_t *pkt = queue->packets + queue->current_index;
if (pkt->pts100 != UINT_MAX)
if (pkt->pts100 <= pts100) {
++queue->current_index;
*data = pkt->data;
*timestamp = pkt->pts100;
return pkt->size;
} else
break;
else
++queue->current_index;
}
}
return -1;
}
void vobsub_seek(void * vobhandle, float pts)
{
vobsub_t * vob = vobhandle;
packet_queue_t * queue;
int seek_pts100 = pts * 90000;
if (vob->spu_streams && 0 <= vobsub_id && (unsigned) vobsub_id < vob->spu_streams_size) {
/* do not seek if we don't know the id */
if (vobsub_get_id(vob, vobsub_id) == NULL)
return;
queue = vob->spu_streams + vobsub_id;
queue->current_index = 0;
vobsub_queue_reseek(queue, seek_pts100);
}
}
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