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/*
* 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 <stdlib.h>
#include <ass/ass.h>
#include <assert.h>
#include <string.h>
#include "talloc.h"
#include "mpcommon.h"
#include "mp_msg.h"
#include "libmpdemux/stheader.h"
#include "sub.h"
#include "ass_mp.h"
#include "sd.h"
#include "subassconvert.h"
struct sd_ass_priv {
struct ass_track *ass_track;
bool incomplete_event;
};
static void free_last_event(ASS_Track *track)
{
assert(track->n_events > 0);
ass_free_event(track, track->n_events - 1);
track->n_events--;
}
static void init(struct sh_sub *sh, struct osd_state *osd)
{
struct sd_ass_priv *ctx;
if (sh->initialized) {
ctx = sh->context;
} else {
ctx = talloc_zero(NULL, struct sd_ass_priv);
sh->context = ctx;
if (sh->type == 'a') {
ctx->ass_track = ass_new_track(osd->ass_library);
if (sh->extradata)
ass_process_codec_private(ctx->ass_track, sh->extradata,
sh->extradata_len);
} else
ctx->ass_track = mp_ass_default_track(osd->ass_library, sh->opts);
}
assert(osd->ass_track == NULL);
osd->ass_track = ctx->ass_track;
osd->vsfilter_aspect = sh->type == 'a';
osd->ass_track_changed = true;
}
static void decode(struct sh_sub *sh, struct osd_state *osd, void *data,
int data_len, double pts, double duration)
{
unsigned char *text = data;
struct sd_ass_priv *ctx = sh->context;
ASS_Track *track = ctx->ass_track;
if (sh->type == 'a') { // ssa/ass subs
ass_process_chunk(track, data, data_len,
(long long)(pts*1000 + 0.5),
(long long)(duration*1000 + 0.5));
return;
}
// plaintext subs
if (pts == MP_NOPTS_VALUE) {
mp_msg(MSGT_SUBREADER, MSGL_WARN, "Subtitle without pts, ignored\n");
return;
}
long long ipts = pts * 1000 + 0.5;
long long iduration = duration * 1000 + 0.5;
if (ctx->incomplete_event) {
ctx->incomplete_event = false;
ASS_Event *event = track->events + track->n_events - 1;
if (ipts <= event->Start)
free_last_event(track);
else
event->Duration = ipts - event->Start;
}
// Note: we rely on there being guaranteed 0 bytes after data packets
int len = strlen(text);
if (len < 5) {
// Some tracks use a whitespace (but not empty) packet to mark end
// of previous subtitle.
for (int i = 0; i < len; i++)
if (!strchr(" \f\n\r\t\v", text[i]))
goto not_all_whitespace;
return;
}
not_all_whitespace:;
char buf[500];
subassconvert_subrip(text, buf, sizeof(buf));
for (int i = 0; i < track->n_events; i++)
if (track->events[i].Start == ipts
&& (duration <= 0 || track->events[i].Duration == iduration)
&& strcmp(track->events[i].Text, buf) == 0)
return; // We've already added this subtitle
if (duration <= 0) {
iduration = 10000;
ctx->incomplete_event = true;
}
int eid = ass_alloc_event(track);
ASS_Event *event = track->events + eid;
event->Start = ipts;
event->Duration = iduration;
event->Style = track->default_style;
event->Text = strdup(buf);
}
static void reset(struct sh_sub *sh, struct osd_state *osd)
{
struct sd_ass_priv *ctx = sh->context;
if (ctx->incomplete_event)
free_last_event(ctx->ass_track);
ctx->incomplete_event = false;
}
static void switch_off(struct sh_sub *sh, struct osd_state *osd)
{
reset(sh, osd);
osd->ass_track = NULL;
}
static void uninit(struct sh_sub *sh)
{
struct sd_ass_priv *ctx = sh->context;
ass_free_track(ctx->ass_track);
talloc_free(ctx);
}
const struct sd_functions sd_ass = {
.init = init,
.decode = decode,
.reset = reset,
.switch_off = switch_off,
.uninit = uninit,
};
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