mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-28 02:12:28 +00:00
790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
249 lines
7.7 KiB
C
249 lines
7.7 KiB
C
/*
|
|
* SSA/ASS muxer
|
|
* Copyright (c) 2008 Michael Niedermayer
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/mem.h"
|
|
#include "avformat.h"
|
|
#include "avio_internal.h"
|
|
#include "internal.h"
|
|
#include "mux.h"
|
|
|
|
#include "libavutil/opt.h"
|
|
|
|
typedef struct DialogueLine {
|
|
int readorder;
|
|
char *line;
|
|
struct DialogueLine *prev, *next;
|
|
} DialogueLine;
|
|
|
|
typedef struct ASSContext {
|
|
const AVClass *class;
|
|
int expected_readorder;
|
|
DialogueLine *dialogue_cache;
|
|
DialogueLine *last_added_dialogue;
|
|
int cache_size;
|
|
int ssa_mode;
|
|
int ignore_readorder;
|
|
uint8_t *trailer;
|
|
size_t trailer_size;
|
|
} ASSContext;
|
|
|
|
static int write_header(AVFormatContext *s)
|
|
{
|
|
ASSContext *ass = s->priv_data;
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
|
|
avpriv_set_pts_info(s->streams[0], 64, 1, 100);
|
|
if (par->extradata_size > 0) {
|
|
size_t header_size = par->extradata_size;
|
|
uint8_t *trailer = strstr(par->extradata, "\n[Events]");
|
|
|
|
if (trailer)
|
|
trailer = strstr(trailer, "Format:");
|
|
if (trailer)
|
|
trailer = strstr(trailer, "\n");
|
|
|
|
if (trailer) {
|
|
header_size = (++trailer - par->extradata);
|
|
ass->trailer_size = par->extradata_size - header_size;
|
|
if (ass->trailer_size)
|
|
ass->trailer = trailer;
|
|
}
|
|
|
|
ffio_write_lines(s->pb, par->extradata, header_size, NULL);
|
|
|
|
ass->ssa_mode = !strstr(par->extradata, "\n[V4+ Styles]");
|
|
if (!strstr(par->extradata, "\n[Events]"))
|
|
avio_printf(s->pb, "[Events]\nFormat: %s, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\n",
|
|
ass->ssa_mode ? "Marked" : "Layer");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void purge_dialogues(AVFormatContext *s, int force)
|
|
{
|
|
int n = 0;
|
|
ASSContext *ass = s->priv_data;
|
|
DialogueLine *dialogue = ass->dialogue_cache;
|
|
|
|
while (dialogue && (dialogue->readorder == ass->expected_readorder || force)) {
|
|
DialogueLine *next = dialogue->next;
|
|
if (dialogue->readorder != ass->expected_readorder) {
|
|
av_log(s, AV_LOG_WARNING, "ReadOrder gap found between %d and %d\n",
|
|
ass->expected_readorder, dialogue->readorder);
|
|
ass->expected_readorder = dialogue->readorder;
|
|
}
|
|
avio_print(s->pb, "Dialogue: ", dialogue->line, "\n");
|
|
if (dialogue == ass->last_added_dialogue)
|
|
ass->last_added_dialogue = next;
|
|
av_freep(&dialogue->line);
|
|
av_free(dialogue);
|
|
if (next)
|
|
next->prev = NULL;
|
|
dialogue = ass->dialogue_cache = next;
|
|
ass->expected_readorder++;
|
|
n++;
|
|
}
|
|
ass->cache_size -= n;
|
|
if (n > 1)
|
|
av_log(s, AV_LOG_DEBUG, "wrote %d ASS lines, cached dialogues: %d, waiting for event id %d\n",
|
|
n, ass->cache_size, ass->expected_readorder);
|
|
}
|
|
|
|
static void insert_dialogue(ASSContext *ass, DialogueLine *dialogue)
|
|
{
|
|
DialogueLine *cur, *next = NULL, *prev = NULL;
|
|
|
|
/* from the last added to the end of the list */
|
|
if (ass->last_added_dialogue) {
|
|
for (cur = ass->last_added_dialogue; cur; cur = cur->next) {
|
|
if (cur->readorder > dialogue->readorder)
|
|
break;
|
|
prev = cur;
|
|
next = cur->next;
|
|
}
|
|
}
|
|
|
|
/* from the beginning to the last one added */
|
|
if (!prev) {
|
|
next = ass->dialogue_cache;
|
|
for (cur = next; cur != ass->last_added_dialogue; cur = cur->next) {
|
|
if (cur->readorder > dialogue->readorder)
|
|
break;
|
|
prev = cur;
|
|
next = cur->next;
|
|
}
|
|
}
|
|
|
|
if (prev) {
|
|
prev->next = dialogue;
|
|
dialogue->prev = prev;
|
|
} else {
|
|
dialogue->prev = ass->dialogue_cache;
|
|
ass->dialogue_cache = dialogue;
|
|
}
|
|
if (next) {
|
|
next->prev = dialogue;
|
|
dialogue->next = next;
|
|
}
|
|
ass->cache_size++;
|
|
ass->last_added_dialogue = dialogue;
|
|
}
|
|
|
|
static int write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ASSContext *ass = s->priv_data;
|
|
|
|
long int layer;
|
|
int text_len;
|
|
char *p = pkt->data;
|
|
int64_t start = pkt->pts;
|
|
int64_t end = start + pkt->duration;
|
|
int hh1, mm1, ss1, ms1;
|
|
int hh2, mm2, ss2, ms2;
|
|
DialogueLine *dialogue = av_mallocz(sizeof(*dialogue));
|
|
|
|
if (!dialogue)
|
|
return AVERROR(ENOMEM);
|
|
|
|
dialogue->readorder = strtol(p, &p, 10);
|
|
if (dialogue->readorder < ass->expected_readorder)
|
|
av_log(s, AV_LOG_WARNING, "Unexpected ReadOrder %d\n",
|
|
dialogue->readorder);
|
|
if (*p == ',')
|
|
p++;
|
|
|
|
if (ass->ssa_mode && !strncmp(p, "Marked=", 7))
|
|
p += 7;
|
|
|
|
layer = strtol(p, &p, 10);
|
|
if (*p == ',')
|
|
p++;
|
|
hh1 = (int)(start / 360000); mm1 = (int)(start / 6000) % 60;
|
|
hh2 = (int)(end / 360000); mm2 = (int)(end / 6000) % 60;
|
|
ss1 = (int)(start / 100) % 60; ms1 = (int)(start % 100);
|
|
ss2 = (int)(end / 100) % 60; ms2 = (int)(end % 100);
|
|
if (hh1 > 9) hh1 = 9, mm1 = 59, ss1 = 59, ms1 = 99;
|
|
if (hh2 > 9) hh2 = 9, mm2 = 59, ss2 = 59, ms2 = 99;
|
|
|
|
text_len = strlen(p);
|
|
while (text_len > 0 && p[text_len - 1] == '\r' || p[text_len - 1] == '\n')
|
|
text_len--;
|
|
|
|
dialogue->line = av_asprintf("%s%ld,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%.*s",
|
|
ass->ssa_mode ? "Marked=" : "",
|
|
layer, hh1, mm1, ss1, ms1, hh2, mm2, ss2, ms2, text_len, p);
|
|
if (!dialogue->line) {
|
|
av_free(dialogue);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
insert_dialogue(ass, dialogue);
|
|
purge_dialogues(s, ass->ignore_readorder);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_trailer(AVFormatContext *s)
|
|
{
|
|
ASSContext *ass = s->priv_data;
|
|
|
|
purge_dialogues(s, 1);
|
|
|
|
if (ass->trailer) {
|
|
ffio_write_lines(s->pb, ass->trailer, ass->trailer_size, NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(ASSContext, x)
|
|
#define E AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "ignore_readorder", "write events immediately, even if they're out-of-order", OFFSET(ignore_readorder), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass ass_class = {
|
|
.class_name = "ass muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const FFOutputFormat ff_ass_muxer = {
|
|
.p.name = "ass",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("SSA (SubStation Alpha) subtitle"),
|
|
.p.mime_type = "text/x-ass",
|
|
.p.extensions = "ass,ssa",
|
|
.p.audio_codec = AV_CODEC_ID_NONE,
|
|
.p.video_codec = AV_CODEC_ID_NONE,
|
|
.p.subtitle_codec = AV_CODEC_ID_ASS,
|
|
.p.flags = AVFMT_GLOBALHEADER | AVFMT_NOTIMESTAMPS | AVFMT_TS_NONSTRICT,
|
|
.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH |
|
|
FF_OFMT_FLAG_ONLY_DEFAULT_CODECS,
|
|
.p.priv_class = &ass_class,
|
|
.priv_data_size = sizeof(ASSContext),
|
|
.write_header = write_header,
|
|
.write_packet = write_packet,
|
|
.write_trailer = write_trailer,
|
|
};
|