Commit 62487ef4 authored by Jean-Baptiste Kempf's avatar Jean-Baptiste Kempf

Remove unmaintained SSA demuxer

We don't need it anyway
parent 2f00cae9
......@@ -44,7 +44,6 @@ $Id$
* aout_file: Audio output to write to a file
* aout_sdl: audio output module using the SDL library
* araw: Pseudo audio decoder for raw PCM
* asademux: ASS/SSA subtitles demuxer
* asf: ASF demuxer
* atmo: Ambilight-like video-output
* au: AU file demuxer
......
......@@ -18,7 +18,6 @@ SOURCES_pva = pva.c
SOURCES_aiff = aiff.c
SOURCES_mjpeg = mjpeg.c
SOURCES_subtitle = subtitle.c
SOURCES_asademux = subtitle_asa.c asademux.c asademux_defs.h asademux.h
SOURCES_ty = ty.c ../codec/cc.h
SOURCES_vobsub = vobsub.c vobsub.h
SOURCES_voc = voc.c
......
/*****************************************************************************
* asademux.c: asa demuxer VM
*****************************************************************************
* Copyright (C) 2007 the VideoLAN team
*
* Originated from asa: portable digital subtitle renderer
*
* Authors: David Lamparter <equinox at diac24 dot net>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
****************************************************************************/
/****************************************************************************
* Changes from asa version:
* - headers adapted
* - external definition file support dropped
* - integer timestamps
****************************************************************************
* Please retain Linux kernel CodingStyle for sync.
* base commit d8c269b0fae9a8f8904e16e92313da165d664c74
****************************************************************************/
#include "config.h"
#include <vlc_common.h>
#include <vlc_input.h>
#include <vlc_demux.h>
#include <limits.h>
#include <string.h>
#include "asademux.h"
#define MAXDELTA 4 /**< nr of times kept for delta backref */
#define MAXGROUP 24 /**< maximum number of regex match groups */
#define xfree free
static inline char *xstrdup(const char *str)
{
char *ret = strdup (str);
if (unlikely(ret == NULL))
abort();
return ret;
}
/** state of a running import */
struct asa_import_state {
demux_t *demux; /**< demuxer for msg* funcs */
const char *line; /**< beginning of current line */
size_t remain; /**< remaining data at line */
char **matches; /**< active matchgroups */
unsigned nmatches; /**< number of matchgroups */
char *selstr; /**< buffer for currently selected */
size_t sellen; /**< strlen of selstr */
char *out; /**< output buffer (NULL if empty) */
size_t outlen; /**< length of output string w/o \0 */
int64_t usecperf, /**< microseconds per frame, active */
origusecperf, /**< microseconds per frame, from app */
start, /**< start time */
end; /**< end time */
int64_t delta[MAXDELTA]; /**< hist of last times for delta */
asa_import_callback *cb; /**< commit callback */
void *cb_arg; /**< callback argument */
};
#define iargs struct asa_import_state *state, struct asa_import_insn *insn
/** asa instruction function.
* @param state import state
* @param insn instruction to execute
* @return status code.\n
* 0: continue
* -1: restart from beginning
* >0: break level
*/
typedef int (*asa_import_func)(iargs);
static int asai_commit (iargs);
static int asai_discard(iargs);
static int asai_break (iargs);
static int asai_select (iargs);
static int asai_sg (iargs);
static int asai_sgu (iargs);
static int asai_append (iargs);
static int asai_fps (iargs);
static int asai_show (iargs);
static int asai_hide (iargs);
static int asai_child (iargs);
#undef iargs
/** vm functions. KEEP IN SYNC WITH imports.h! */
static const asa_import_func importfuncs[] = {
asai_commit,
asai_discard,
asai_break,
asai_select,
asai_sg,
asai_sgu,
asai_append,
asai_fps,
asai_show,
asai_hide,
asai_child
};
#define ASAI_MAX (unsigned)(sizeof(importfuncs) / sizeof(importfuncs[0]))
struct asa_import_detect *asa_det_first = NULL,
**asa_det_last = &asa_det_first;
struct asa_import_format *asa_fmt_first = NULL,
**asa_fmt_last = &asa_fmt_first;
/** asa_imports_crosslink - resolve references in imports file.
* updates asa_import_format.prevtgt, asa_import_format.nexttgt,
* asa_import_detect.fmt
*/
static void asa_imports_crosslink(void)
{
struct asa_import_format *fmt, *fmt2;
struct asa_import_detect *det;
for (fmt = asa_fmt_first; fmt; fmt = fmt->next) {
for (fmt2 = fmt->next; fmt2; fmt2 = fmt2->next)
if (!strcmp(fmt->name, fmt2->name)) {
fmt->nexttgt = fmt2;
fmt2->prevtgt = fmt;
break;
}
}
for (det = asa_det_first; det; det = det->next) {
det->fmt = NULL;
for (fmt = asa_fmt_first; fmt; fmt = fmt->next)
if (!strcmp(det->name, fmt->name)) {
det->fmt = fmt;
break;
}
}
}
/** asa_imports_detect - autodetect subtitle format.
* @param data pointer to subtitle byte data
* @param datalen byte length of data
* @return the detect structure that hit or NULL if detection failed
*/
struct asa_import_detect *asa_imports_detect(const void *data, size_t dlen)
{
struct asa_import_detect *det;
const char *d = (const char *)data;
int v[64];
if (dlen > 2048)
dlen = 2048;
for (det = asa_det_first; det; det = det->next)
if (pcre_exec(det->re.pcre, NULL, d, dlen, 0, 0, v, 64) >= 0)
return det;
return NULL;
}
/** asai_run_insns - execute a list of instructions.
* @see asa_import_func */
static int asai_run_insns(struct asa_import_state *state,
struct asa_import_insn *insn)
{
struct asa_import_insn *inow = insn, preload;
int rv, repeating = 0;
preload.next = insn;
for (; inow; inow = inow->next) {
if (repeating && inow->insn != ASAI_CHILD)
continue;
if (inow->insn >= ASAI_MAX)
continue;
rv = importfuncs[inow->insn](state, inow);
if (rv == -1) {
inow = &preload;
continue;
}
if (rv > 0)
return rv - 1;
}
/* ran through everything, let's try another round */
return -1;
}
/** asai_commit - commit a block to the user.
* @see asa_import_func */
static int asai_commit(struct asa_import_state *state,
struct asa_import_insn *insn)
{
int rv = 0;
if (!state->out)
return 0;
if (state->outlen > 0)
rv = state->cb(state->demux, state->cb_arg,
state->start, state->end,
state->out, state->outlen);
xfree(state->out);
state->out = NULL;
state->outlen = 0;
if (rv)
return INT_MAX;
return 0;
}
/** asai_discard - clear the buffer without committing.
* @see asa_import_func */
static int asai_discard(struct asa_import_state *state,
struct asa_import_insn *insn)
{
if (!state->out)
return 0;
xfree(state->out);
state->out = NULL;
state->outlen = 0;
return 0;
}
/** asai_break - jump out of child.
* @see asa_import_func */
static int asai_break(struct asa_import_state *state,
struct asa_import_insn *insn)
{
return insn->v.break_depth;
}
/** asai_select - choose a match group to be the active one.
* @see asa_import_func */
static int asai_select (struct asa_import_state *state,
struct asa_import_insn *insn)
{
if (insn->v.select < 0
|| (unsigned)insn->v.select >= state->nmatches) {
msg_Err(state->demux, "import script trying to "
"reference group %d, maximum is %d",
insn->v.select, state->nmatches);
return 0;
}
if (state->selstr)
xfree(state->selstr);
state->selstr = xstrdup(state->matches[insn->v.select]);
state->sellen = strlen(state->selstr);
return 0;
}
#include <stddef.h>
static ptrdiff_t asai_process_replace(struct asa_import_state *state,
struct asa_import_insn *insn, int *v, int rv)
{
struct asa_repl *r;
char *newstr;
ptrdiff_t newpos, firstold;
size_t newstr_size;
newstr_size = v[0] * 2;
newstr = (char *)xmalloc(newstr_size);
memcpy(newstr, state->selstr, v[0]);
newpos = v[0];
for (r = insn->v.sg.repl; r; r = r->next) {
size_t avail = newstr_size - newpos, need;
const char *src;
if (r->group >= rv) {
msg_Err(state->demux,
"import script trying to replace by "
"reference group %d, maximum is %d",
r->group, rv);
continue;
}
if (r->group >= 0) {
need = v[r->group * 2 + 1] - v[r->group * 2];
src = state->selstr + v[r->group * 2];
} else {
need = strlen(r->text);
src = r->text;
}
if (need > avail) {
newstr_size += need - avail + 256;
newstr = (char *)xrealloc(newstr, newstr_size);
}
memcpy(newstr + newpos, src, need);
newpos += need;
}
firstold = newpos;
newstr_size = newpos + state->sellen - v[1];
newstr = (char *)xrealloc(newstr, newstr_size + 1);
memcpy(newstr + newpos, state->selstr + v[1],
state->sellen - v[1] + 1);
state->selstr = newstr;
state->sellen = newstr_size;
return firstold;
}
/** asai_sg - search and replace.
* @see asa_import_func */
static int asai_sg(struct asa_import_state *state,
struct asa_import_insn *insn)
{
int rv, v[MAXGROUP * 2];
char *oldstr;
ptrdiff_t s = 0;
if (!state->selstr)
return 0;
while ((unsigned)s < state->sellen &&
(rv = pcre_exec(insn->v.sg.regex.pcre, NULL, state->selstr,
state->sellen, s, 0, v, MAXGROUP * 2)) >= 0) {
oldstr = state->selstr;
s = asai_process_replace(state, insn, v, rv);
xfree(oldstr);
}
return 0;
}
/** asai_chunk_alloc - allocate composite chunk.
* @see asa_import_func */
static inline char **asai_chunk_alloc(char **old, int *v, int rv)
{
size_t s = rv * sizeof(char *);
int i;
for (i = 0; i < rv; i++)
s += v[i * 2 + 1] - v[i * 2] + 1;
return (char **)xrealloc(old, s);
}
/** asai_set_matches - load result from pcre_exec into matches */
static void asai_set_matches(struct asa_import_state *state,
const char *src, int *v, int rv)
{
unsigned i;
char *dst;
state->matches = asai_chunk_alloc(state->matches, v, rv);
state->nmatches = rv;
dst = (char *)(state->matches + rv);
for (i = 0; i < state->nmatches; i++) {
size_t len = v[2 * i + 1] - v[2 * i];
state->matches[i] = dst;
memcpy(dst, src + v[2 * i], len);
dst[len] = '\0';
dst += len + 1;
}
if (state->selstr)
xfree(state->selstr);
state->selstr = xstrdup(state->matches[0]);
state->sellen = strlen(state->selstr);
}
/** asai_sgu - replace one time and update matches.
* @see asa_import_func */
static int asai_sgu(struct asa_import_state *state,
struct asa_import_insn *insn)
{
int rv, v[MAXGROUP * 2];
char *oldstr;
if (!state->selstr)
return 0;
if ((rv = pcre_exec(insn->v.sg.regex.pcre, NULL, state->selstr,
state->sellen, 0, 0, v, MAXGROUP * 2)) >= 0) {
oldstr = state->selstr;
asai_process_replace(state, insn, v, rv);
asai_set_matches(state, oldstr, v, rv);
xfree(oldstr);
}
return 0;
}
/** asai_append - append selected string to output buffer.
* @see asa_import_func */
static int asai_append (struct asa_import_state *state,
struct asa_import_insn *insn)
{
state->out = (char *)xrealloc(state->out,
state->outlen + state->sellen + 1);
memcpy(state->out + state->outlen, state->selstr, state->sellen);
state->outlen += state->sellen;
state->out[state->outlen] = '\0';
return 0;
}
/** asai_fps - override fps.
* @see asa_import_func */
static int asai_fps(struct asa_import_state *state,
struct asa_import_insn *insn)
{
if (insn->v.fps_value == 0)
state->usecperf = state->origusecperf;
else
state->usecperf = (int64_t)(1000000. / insn->v.fps_value);
return 0;
}
/** asai_gettime - walk asa_tspec and sum up the time.
* @see asa_import_func
* @return the calculated time, delta[0] on error
* also updates the delta history.
*/
static int64_t asai_gettime(struct asa_import_state *state,
struct asa_import_insn *insn)
{
struct asa_tspec *tsp;
int64_t t = 0;
if (insn->v.tspec.delta_select != -1) {
if (insn->v.tspec.delta_select < MAXDELTA)
t += state->delta[insn->v.tspec.delta_select];
else
msg_Err(state->demux, "imports: tspec "
"delta %d exceeds compiled-in maximum of %d",
insn->v.tspec.delta_select, MAXDELTA);
}
for (tsp = insn->v.tspec.tsp; tsp; tsp = tsp->next) {
char *errptr;
double src;
if ((unsigned)tsp->group >= state->nmatches) {
msg_Err(state->demux, "imports: tspec "
"tries to access group %d, but only "
"%d groups exist",
tsp->group, state->nmatches);
continue;
}
if (!*state->matches[tsp->group])
continue;
src = strtod(state->matches[tsp->group], &errptr);
if (*errptr)
msg_Warn(state->demux, "imports: invalid tspec '%s'",
state->matches[tsp->group]);
t += (src * tsp->mult * 1000000)
+ src * tsp->fps_mult * state->usecperf;
}
memmove(state->delta + 1, state->delta,
sizeof(state->delta[0]) * (MAXDELTA - 1));
state->delta[0] = t;
return t;
}
/** asai_show - set start time.
* @see asa_import_func */
static int asai_show(struct asa_import_state *state,
struct asa_import_insn *insn)
{
state->start = asai_gettime(state, insn);
return 0;
}
/** asai_hide - set end time.
* @see asa_import_func */
static int asai_hide(struct asa_import_state *state,
struct asa_import_insn *insn)
{
state->end = asai_gettime(state, insn);
return 0;
}
/** asai_child - execute childs if we match.
* @see asa_import_func */
static int asai_child(struct asa_import_state *state,
struct asa_import_insn *insn)
{
int rv, v[MAXGROUP * 2];
if ((rv = pcre_exec(insn->v.child.regex.pcre, NULL, state->line,
state->remain, 0, 0, v, MAXGROUP * 2)) >= 0) {
asai_set_matches(state, state->line, v, rv);
state->line += v[1];
state->remain -= v[1];
rv = asai_run_insns(state, insn->v.child.insns);
return rv;
}
return 0;
}
int asa_import(demux_t *d, const void *data, size_t dlen,
int64_t usecperframe, struct asa_import_detect *det,
asa_import_callback *callback, void *arg)
{
struct asa_import_format *fmt = det->fmt;
struct asa_import_state state;
int rv;
memset(&state, 0, sizeof(state));
state.demux = d;
state.usecperf = state.origusecperf = usecperframe;
state.line = (const char *)data;
state.remain = dlen;
state.cb = callback;
state.cb_arg = arg;
rv = asai_run_insns(&state, fmt->insns);
if (state.matches)
xfree(state.matches);
if (state.out) {
callback(d, arg, state.start, state.end,
state.out, state.outlen);
xfree(state.out);
}
if (state.selstr)
xfree(state.selstr);
return rv;
}
int asa_pcre_compile(asa_pcre *out, const char *str)
{
const char *err;
int ec, eo;
out->pcre = pcre_compile2(str, 0, &ec, &err, &eo, NULL);
if (out->pcre)
return 0;
return 1;
}
#include "asademux_defs.h"
void asa_init_import()
{
static int setup = 0;
if (setup)
return;
preparse_add();
asa_imports_crosslink();
setup = 1;
}
/*****************************************************************************
* asademux.c: asa demuxer VM
*****************************************************************************
* Copyright (C) 2007 the VideoLAN team
*
* Originated from asa: portable digital subtitle renderer
*
* Authors: David Lamparter <equinox at diac24 dot net>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
****************************************************************************/
/****************************************************************************
* Changes from asa version:
* - headers adapted
* - external definition file support dropped
* - integer timestamps
****************************************************************************
* Please retain Linux kernel CodingStyle for sync.
* base commit d8c269b0fae9a8f8904e16e92313da165d664c74
****************************************************************************/
#ifndef _ASADEMUX_H
#define _ASADEMUX_H
#include <pcre.h>
/** parser reuse. imports-to-C uses char *, real VM uses pcre * */
typedef union {
pcre *pcre;
char *str;
} asa_pcre;
/** pcre_compile wrapper.
* used to allow loading differently for imports-to-C conversion.
* @param out output (parsed pcre)
* @param str regular expression string
* @return 0 on success, any other on error
*/
extern int asa_pcre_compile(asa_pcre *out, const char *str);
/** import instruction code */
enum asa_import_insn_type {
ASAI_COMMIT = 0, /**< put current buffer as line */
ASAI_DISCARD, /**< discard current buffer */
ASAI_BREAK, /**< leave child group */
ASAI_SELECT, /**< select source matchgroup */
ASAI_SG, /**< execute search & replace on selected */
ASAI_SGU, /**< like ASAI_SG, but update matchgroups */
ASAI_APPEND, /**< append selected source to buffer */