[FFmpeg-devel] [PATCH] JACOsub demuxer, decoder and muxer.
Clément Bœsch
ubitux at gmail.com
Tue May 1 16:55:27 CEST 2012
On Tue, May 01, 2012 at 04:54:42PM +0200, Clément Bœsch wrote:
> I will push the current version in the following days.
>
Should be better with the attached patch.
--
Clément B.
-------------- next part --------------
From dfa356a6c8386eb8d471a1c8d65f800599c36e17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= <ubitux at gmail.com>
Date: Mon, 18 Apr 2011 17:40:51 +0200
Subject: [PATCH] JACOsub demuxer, decoder and muxer.
FIXME: bump version
---
MAINTAINERS | 1 +
doc/general.texi | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/jacosub.h | 43 +++++++
libavcodec/jacosubdec.c | 207 +++++++++++++++++++++++++++++++
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/jacosubdec.c | 304 ++++++++++++++++++++++++++++++++++++++++++++++
libavformat/jacosubenc.c | 42 +++++++
11 files changed, 603 insertions(+)
create mode 100644 libavcodec/jacosub.h
create mode 100644 libavcodec/jacosubdec.c
create mode 100644 libavformat/jacosubdec.c
create mode 100644 libavformat/jacosubenc.c
diff --git a/MAINTAINERS b/MAINTAINERS
index f1a46b7..7d678aa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -315,6 +315,7 @@ Muxers/Demuxers:
ipmovie.c Mike Melanson
img2.c Michael Niedermayer
iss.c Stefan Gehrer
+ jacosub* Clément Bœsch
jvdec.c Peter Ross
libmodplug.c Clément Bœsch
libnut.c Oded Shimon
diff --git a/doc/general.texi b/doc/general.texi
index a999acf..2fbcbbf 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -837,6 +837,7 @@ performance on systems without hardware floating point support).
@item SSA/ASS @tab X @tab X @tab X @tab X
@item DVB @tab X @tab X @tab X @tab X
@item DVD @tab X @tab X @tab X @tab X
+ at item JACOsub @tab X @tab X @tab @tab X
@item MicroDVD @tab X @tab X @tab @tab X
@item PGS @tab @tab @tab @tab X
@item SubRip (SRT) @tab X @tab X @tab X @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 28d4a1c..2a1b15f 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -221,6 +221,7 @@ OBJS-$(CONFIG_INDEO4_DECODER) += indeo4.o ivi_common.o ivi_dsp.o
OBJS-$(CONFIG_INDEO5_DECODER) += indeo5.o ivi_common.o ivi_dsp.o
OBJS-$(CONFIG_INTERPLAY_DPCM_DECODER) += dpcm.o
OBJS-$(CONFIG_INTERPLAY_VIDEO_DECODER) += interplayvideo.o
+OBJS-$(CONFIG_JACOSUB_DECODER) += jacosubdec.o ass.o
OBJS-$(CONFIG_JPEG2000_DECODER) += j2kdec.o mqcdec.o mqc.o j2k.o j2k_dwt.o
OBJS-$(CONFIG_JPEG2000_ENCODER) += j2kenc.o mqcenc.o mqc.o j2k.o j2k_dwt.o
OBJS-$(CONFIG_JPEGLS_DECODER) += jpeglsdec.o jpegls.o \
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index d31d29a..c12c783 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -397,6 +397,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (ASS, ass);
REGISTER_ENCDEC (DVBSUB, dvbsub);
REGISTER_ENCDEC (DVDSUB, dvdsub);
+ REGISTER_DECODER (JACOSUB, jacosub);
REGISTER_DECODER (MICRODVD, microdvd);
REGISTER_DECODER (PGSSUB, pgssub);
REGISTER_ENCDEC (SRT, srt);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index b2279ea..0d2339a 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -423,6 +423,7 @@ enum CodecID {
CODEC_ID_SRT,
CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'),
CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'),
+ CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'),
/* other specific kind of codecs (generally used for attachments) */
CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
diff --git a/libavcodec/jacosub.h b/libavcodec/jacosub.h
new file mode 100644
index 0000000..410969e
--- /dev/null
+++ b/libavcodec/jacosub.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012 Clément Bœsch
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * JACOsub shared utils
+ */
+
+#ifndef AVCODEC_JACOSUB_H
+#define AVCODEC_JACOSUB_H
+
+#define JSS_MAX_LINESIZE 512
+
+static av_always_inline int jss_whitespace(char c)
+{
+ return c == ' ' || (c >= '\t' && c <= '\r');
+}
+
+static av_always_inline const char *jss_skip_whitespace(const char *p)
+{
+ while (jss_whitespace(*p))
+ p++;
+ return p;
+}
+
+#endif /* AVCODEC_JACOSUB_H */
diff --git a/libavcodec/jacosubdec.c b/libavcodec/jacosubdec.c
new file mode 100644
index 0000000..8c02d3b
--- /dev/null
+++ b/libavcodec/jacosubdec.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2012 Clément Bœsch
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * JACOsub subtitle decoder
+ * @see http://unicorn.us.com/jacosub/jscripts.html
+ */
+
+#include <time.h>
+#include "ass.h"
+#include "jacosub.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
+
+#undef time
+
+static int insert_text(AVBPrint *dst, const char *in, const char *arg)
+{
+ av_bprintf(dst, "%s", arg);
+ return 0;
+}
+
+static int insert_datetime(AVBPrint *dst, const char *in, const char *arg)
+{
+ char buf[16] = {0};
+ time_t now = time(0);
+ struct tm ltime;
+
+#if HAVE_LOCALTIME_R
+ localtime_r(&now, <ime);
+#else
+ ltime = *localtime(&now);
+#endif
+ strftime(buf, sizeof(buf), arg, <ime);
+ av_bprintf(dst, "%s", buf);
+ return 0;
+}
+
+static int insert_color(AVBPrint *dst, const char *in, const char *arg)
+{
+ return 1; // skip id
+}
+
+static int insert_font(AVBPrint *dst, const char *in, const char *arg)
+{
+ return 1; // skip id
+}
+
+static const struct {
+ const char *from;
+ const char *arg;
+ int (*func)(AVBPrint *dst, const char *in, const char *arg);
+} ass_codes_map[] = {
+ {"\\~", "~", insert_text}, // tilde doesn't need escaping
+ {"~", "{\\h}", insert_text}, // hard space
+ {"\\n", "\\N", insert_text}, // newline
+ {"\\D", "%d %b %Y", insert_datetime}, // current date
+ {"\\T", "%H:%M", insert_datetime}, // current time
+ {"\\N", "{\\r}", insert_text}, // reset to default style
+ {"\\I", "{\\i1}", insert_text}, // italic on
+ {"\\i", "{\\i0}", insert_text}, // italic off
+ {"\\B", "{\\b1}", insert_text}, // bold on
+ {"\\b", "{\\b0}", insert_text}, // bold off
+ {"\\U", "{\\u1}", insert_text}, // underline on
+ {"\\u", "{\\u0}", insert_text}, // underline off
+ {"\\C", "", insert_color}, // TODO: color
+ {"\\F", "", insert_font}, // TODO: font
+};
+
+enum {
+ ALIGN_VB = 1<<0, // vertical bottom, default
+ ALIGN_VM = 1<<1, // vertical middle
+ ALIGN_VT = 1<<2, // vertical top
+ ALIGN_JC = 1<<3, // justify center, default
+ ALIGN_JL = 1<<4, // justify left
+ ALIGN_JR = 1<<5, // justify right
+};
+
+static void jacosub_to_ass(AVCodecContext *avctx, AVBPrint *dst, const char *src)
+{
+ int i, valign = 0, halign = 0;
+ char c = av_toupper(*src);
+ char directives[128] = {0};
+
+ /* extract the optional directives */
+ if ((c >= 'A' && c <= 'Z') || c == '[') {
+ char *p = directives;
+ char *pend = directives + sizeof(directives) - 1;
+
+ do *p++ = av_toupper(*src++);
+ while (*src && !jss_whitespace(*src) && p < pend);
+ *p = 0;
+ src = jss_skip_whitespace(src);
+ }
+
+ /* handle directives (TODO: handle more of them, and more reliably) */
+ if (strstr(directives, "VB")) valign = ALIGN_VB;
+ else if (strstr(directives, "VM")) valign = ALIGN_VM;
+ else if (strstr(directives, "VT")) valign = ALIGN_VT;
+ if (strstr(directives, "JC")) halign = ALIGN_JC;
+ else if (strstr(directives, "JL")) halign = ALIGN_JL;
+ else if (strstr(directives, "JR")) halign = ALIGN_JR;
+ if (valign || halign) {
+ if (!valign) valign = ALIGN_VB;
+ if (!halign) halign = ALIGN_JC;
+ switch (valign | halign) {
+ case ALIGN_VB | ALIGN_JL: av_bprintf(dst, "{\\an1}"); break; // bottom left
+ case ALIGN_VB | ALIGN_JC: av_bprintf(dst, "{\\an2}"); break; // bottom center
+ case ALIGN_VB | ALIGN_JR: av_bprintf(dst, "{\\an3}"); break; // bottom right
+ case ALIGN_VM | ALIGN_JL: av_bprintf(dst, "{\\an4}"); break; // middle left
+ case ALIGN_VM | ALIGN_JC: av_bprintf(dst, "{\\an5}"); break; // middle center
+ case ALIGN_VM | ALIGN_JR: av_bprintf(dst, "{\\an6}"); break; // middle right
+ case ALIGN_VT | ALIGN_JL: av_bprintf(dst, "{\\an7}"); break; // top left
+ case ALIGN_VT | ALIGN_JC: av_bprintf(dst, "{\\an8}"); break; // top center
+ case ALIGN_VT | ALIGN_JR: av_bprintf(dst, "{\\an9}"); break; // top right
+ }
+ }
+
+ /* process timed line */
+ while (*src && *src != '\n') {
+
+ /* text continue on the next line */
+ if (src[0] == '\\' && src[1] == '\n') {
+ src += 2;
+ while (jss_whitespace(*src))
+ src++;
+ continue;
+ }
+
+ /* special character codes */
+ for (i = 0; i < FF_ARRAY_ELEMS(ass_codes_map); i++) {
+ const char *from = ass_codes_map[i].from;
+ const char *arg = ass_codes_map[i].arg;
+ size_t codemap_len = strlen(from);
+
+ if (!strncmp(src, from, codemap_len)) {
+ src += codemap_len;
+ src += ass_codes_map[i].func(dst, src, arg);
+ break;
+ }
+ }
+
+ /* simple char copy */
+ if (i == FF_ARRAY_ELEMS(ass_codes_map))
+ av_bprintf(dst, "%c", *src++);
+ }
+ av_bprintf(dst, "\r\n");
+}
+
+static int jacosub_decode_frame(AVCodecContext *avctx,
+ void *data, int *got_sub_ptr, AVPacket *avpkt)
+{
+ AVSubtitle *sub = data;
+ const char *ptr = avpkt->data;
+
+ if (avpkt->size <= 0)
+ goto end;
+
+ if (*ptr) {
+ int ts_start = avpkt->pts;
+ int ts_end = avpkt->pts + avpkt->duration;
+ AVBPrint buffer;
+ char *dec_sub;
+
+ // skip timers
+ ptr = jss_skip_whitespace(ptr);
+ ptr = strchr(ptr, ' '); if (!ptr) goto end; ptr++;
+ ptr = strchr(ptr, ' '); if (!ptr) goto end; ptr++;
+
+ av_bprint_init(&buffer, JSS_MAX_LINESIZE, JSS_MAX_LINESIZE);
+ jacosub_to_ass(avctx, &buffer, ptr);
+ av_bprint_finalize(&buffer, &dec_sub);
+ ff_ass_add_rect(sub, dec_sub, ts_start, ts_end, 0);
+ av_free(dec_sub);
+ }
+
+end:
+ *got_sub_ptr = sub->num_rects > 0;
+ return avpkt->size;
+}
+
+AVCodec ff_jacosub_decoder = {
+ .name = "jacosub",
+ .long_name = NULL_IF_CONFIG_SMALL("JACOsub subtitle"),
+ .type = AVMEDIA_TYPE_SUBTITLE,
+ .id = CODEC_ID_JACOSUB,
+ .init = ff_ass_subtitle_header_default,
+ .decode = jacosub_decode_frame,
+};
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 212c9d7..831f679 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -131,6 +131,7 @@ OBJS-$(CONFIG_ISS_DEMUXER) += iss.o
OBJS-$(CONFIG_IV8_DEMUXER) += iv8.o
OBJS-$(CONFIG_IVF_DEMUXER) += ivfdec.o
OBJS-$(CONFIG_IVF_MUXER) += ivfenc.o
+OBJS-$(CONFIG_JACOSUB_DEMUXER) += jacosubdec.o jacosubenc.o
OBJS-$(CONFIG_JV_DEMUXER) += jvdec.o
OBJS-$(CONFIG_LATM_DEMUXER) += rawdec.o
OBJS-$(CONFIG_LATM_MUXER) += latmenc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 905a165..ad2693a 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -125,6 +125,7 @@ void av_register_all(void)
REGISTER_DEMUXER (ISS, iss);
REGISTER_DEMUXER (IV8, iv8);
REGISTER_MUXDEMUX (IVF, ivf);
+ REGISTER_MUXDEMUX (JACOSUB, jacosub);
REGISTER_DEMUXER (JV, jv);
REGISTER_MUXDEMUX (LATM, latm);
REGISTER_DEMUXER (LMLM4, lmlm4);
diff --git a/libavformat/jacosubdec.c b/libavformat/jacosubdec.c
new file mode 100644
index 0000000..30c4f63
--- /dev/null
+++ b/libavformat/jacosubdec.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 2012 Clément Bœsch
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * JACOsub subtitle demuxer
+ * @see http://unicorn.us.com/jacosub/jscripts.html
+ * @todo Support P[ALETTE] directive.
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "libavcodec/jacosub.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
+#include "libavutil/intreadwrite.h"
+
+typedef struct {
+ char *line; ///< null-terminated heap allocated subtitle line
+ int64_t pos; ///< offset position
+ int start; ///< timestamp start
+ int end; ///< timestamp end
+} SubEntry;
+
+typedef struct {
+ int shift;
+ unsigned timeres;
+ SubEntry *subs; ///< subtitles list
+ int nsub; ///< number of subtitles
+ int sid; ///< current subtitle
+} JACOsubContext;
+
+static int timed_line(const char *ptr)
+{
+ char c;
+ return (sscanf(ptr, "%*u:%*u:%*u.%*u %*u:%*u:%*u.%*u %c", &c) == 1 ||
+ sscanf(ptr, "@%*u @%*u %c", &c) == 1);
+}
+
+static int jacosub_probe(AVProbeData *p)
+{
+ const char *ptr = p->buf;
+ const char *ptr_end = p->buf + p->buf_size;
+
+ if (AV_RB24(ptr) == 0xEFBBBF)
+ ptr += 3; /* skip UTF-8 BOM */
+
+ while (ptr < ptr_end) {
+ if (timed_line(ptr))
+ return AVPROBE_SCORE_MAX / 2;
+ while (jss_whitespace(*ptr))
+ ptr++;
+ ptr += strcspn(ptr, "\n") + 1;
+ }
+ return 0;
+}
+
+static const char * const cmds[] = {
+ "CLOCKPAUSE",
+ "DIRECTIVE",
+ "FONT",
+ "HRES",
+ "INCLUDE",
+ "PALETTE",
+ "QUANTIZE",
+ "RAMP",
+ "SHIFT",
+ "TIMERES",
+};
+
+static int get_jss_cmd(char k)
+{
+ int i;
+
+ k = av_toupper(k);
+ for (i = 0; i < FF_ARRAY_ELEMS(cmds); i++)
+ if (k == cmds[i][0])
+ return i;
+ return -1;
+}
+
+static int jacosub_read_close(AVFormatContext *s)
+{
+ int i;
+ JACOsubContext *jacosub = s->priv_data;
+
+ for (i = 0; i < jacosub->nsub; i++)
+ av_freep(&jacosub->subs[i].line);
+ jacosub->nsub = 0;
+ av_freep(&jacosub->subs);
+ return 0;
+}
+
+static const char *read_ts(JACOsubContext *jacosub, const char *buf,
+ int *ts_start, int *ts_end)
+{
+ int len;
+ unsigned hs, ms, ss, fs; // hours, minutes, seconds, frame start
+ unsigned he, me, se, fe; // hours, minutes, seconds, frame end
+
+ /* timed format */
+ if (sscanf(buf, "%u:%u:%u.%u %u:%u:%u.%u %n",
+ &hs, &ms, &ss, &fs,
+ &he, &me, &se, &fe, &len) == 8) {
+ *ts_start = (hs*3600 + ms*60 + ss) * jacosub->timeres + fs;
+ *ts_end = (he*3600 + me*60 + se) * jacosub->timeres + fe;
+ goto shift_and_ret;
+ }
+
+ /* timestamps format */
+ if (sscanf(buf, "@%u @%u %n", ts_start, ts_end, &len) == 2)
+ goto shift_and_ret;
+
+ return NULL;
+
+shift_and_ret:
+ *ts_start = (*ts_start + jacosub->shift) * 100 / jacosub->timeres;
+ *ts_end = (*ts_end + jacosub->shift) * 100 / jacosub->timeres;
+ return buf + len;
+}
+
+static int get_shift(int timeres, const char *buf)
+{
+ int sign = 1;
+ int a = 0, b = 0, c = 0, d = 0;
+#define SSEP "%*1[.:]"
+ int n = sscanf(buf, "%d"SSEP"%d"SSEP"%d"SSEP"%d", &a, &b, &c, &d);
+#undef SSEP
+
+ if (*buf == '-' || a < 0) {
+ sign = -1;
+ a = FFABS(a);
+ }
+
+ switch (n) {
+ case 4: return sign * ((a*3600 + b*60 + c) * timeres + d);
+ case 3: return sign * (( a*60 + b) * timeres + c);
+ case 2: return sign * (( a) * timeres + b);
+ }
+
+ return 0;
+}
+
+static int cmp_timed_sub(const void *a, const void *b)
+{
+ return ((const SubEntry*)a)->start - ((const SubEntry*)b)->start;
+}
+
+static int jacosub_read_header(AVFormatContext *s)
+{
+ AVBPrint header;
+ AVIOContext *pb = s->pb;
+ char line[JSS_MAX_LINESIZE];
+ JACOsubContext *jacosub = s->priv_data;
+ int shift_set = 0; // only the first shift matters
+ int merge_line = 0;
+ int i;
+
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 64, 1, 100);
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codec->codec_id = CODEC_ID_JACOSUB;
+
+ jacosub->timeres = 30;
+
+ av_bprint_init(&header, 1024+FF_INPUT_BUFFER_PADDING_SIZE, 4096);
+
+ while (!url_feof(pb)) {
+ int cmd_len;
+ const char *p = line;
+ int64_t pos = avio_tell(pb);
+
+ ff_get_line(pb, line, sizeof(line));
+
+ p = jss_skip_whitespace(p);
+
+ /* queue timed line */
+ if (merge_line || timed_line(p)) {
+ SubEntry *subs, *sub;
+ const int len = strlen(line);
+
+ if (merge_line) {
+ char *tmp;
+ const int old_len = strlen(sub->line);
+
+ sub = &subs[jacosub->nsub];
+ tmp = av_realloc(sub->line, old_len + len + 1);
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ sub->line = tmp;
+ strcpy(sub->line + old_len, line);
+ } else {
+ subs = av_realloc(jacosub->subs,
+ sizeof(*jacosub->subs) * (jacosub->nsub+1));
+ if (!subs)
+ return AVERROR(ENOMEM);
+ jacosub->subs = subs;
+ sub = &subs[jacosub->nsub];
+ sub->pos = pos;
+ sub->line = av_strdup(line);
+ if (!sub->line)
+ return AVERROR(ENOMEM);
+ }
+ merge_line = len > 1 && !strcmp(&line[len - 2], "\\\n");
+ if (!merge_line)
+ jacosub->nsub++;
+ continue;
+ }
+
+ /* skip all non-compiler commands and focus on the command */
+ if (*p != '#')
+ continue;
+ p++;
+ i = get_jss_cmd(p[0]);
+ if (i == -1)
+ continue;
+
+ /* trim command + spaces */
+ cmd_len = strlen(cmds[i]);
+ if (av_strncasecmp(p, cmds[i], cmd_len) == 0)
+ p += cmd_len;
+ else
+ p++;
+ p = jss_skip_whitespace(p);
+
+ /* handle commands which affect the whole script */
+ switch (cmds[i][0]) {
+ case 'S': // SHIFT command affect the whole script...
+ if (!shift_set) {
+ jacosub->shift = get_shift(jacosub->timeres, p);
+ shift_set = 1;
+ }
+ av_bprintf(&header, "#S %s", p);
+ break;
+ case 'T': // ...but must be placed after TIMERES
+ jacosub->timeres = strtol(p, NULL, 10);
+ av_bprintf(&header, "#T %s", p);
+ break;
+ }
+ }
+
+ /* general/essential directives in the extradata */
+ av_bprint_finalize(&header, (char **)&st->codec->extradata);
+ st->codec->extradata_size = header.len + 1;
+
+ /* SHIFT and TIMERES affect the whole script so packet timing can only be
+ * done in a second pass */
+ for (i = 0; i < jacosub->nsub; i++) {
+ SubEntry *sub = &jacosub->subs[i];
+ read_ts(jacosub, sub->line, &sub->start, &sub->end);
+ }
+ qsort(jacosub->subs, jacosub->nsub, sizeof(*jacosub->subs), cmp_timed_sub);
+
+ return 0;
+}
+
+static int jacosub_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ int res;
+ JACOsubContext *jacosub = s->priv_data;
+ const SubEntry *sub = &jacosub->subs[jacosub->sid++];
+
+ if (jacosub->sid == jacosub->nsub)
+ return AVERROR_EOF;
+ res = av_new_packet(pkt, strlen(sub->line));
+ if (res)
+ return res;
+ strcpy(pkt->data, sub->line);
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ pkt->pos = sub->pos;
+ pkt->pts = pkt->dts = sub->start;
+ pkt->duration = sub->end - sub->start;
+ return 0;
+}
+
+AVInputFormat ff_jacosub_demuxer = {
+ .name = "jacosub",
+ .long_name = NULL_IF_CONFIG_SMALL("JACOsub subtitle format"),
+ .priv_data_size = sizeof(JACOsubContext),
+ .read_probe = jacosub_probe,
+ .read_header = jacosub_read_header,
+ .read_packet = jacosub_read_packet,
+ .read_close = jacosub_read_close,
+ .flags = AVFMT_GENERIC_INDEX,
+};
diff --git a/libavformat/jacosubenc.c b/libavformat/jacosubenc.c
new file mode 100644
index 0000000..57866b3
--- /dev/null
+++ b/libavformat/jacosubenc.c
@@ -0,0 +1,42 @@
+/*
+ * 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 "avformat.h"
+#include "rawenc.h"
+
+static int jacosub_write_header(AVFormatContext *s)
+{
+ const AVCodecContext *avctx = s->streams[0]->codec;
+
+ if (avctx->extradata_size) {
+ avio_write(s->pb, avctx->extradata, avctx->extradata_size - 1);
+ avio_flush(s->pb);
+ }
+ return 0;
+}
+
+AVOutputFormat ff_jacosub_muxer = {
+ .name = "jacosub",
+ .long_name = NULL_IF_CONFIG_SMALL("JACOsub subtitle format"),
+ .mime_type = "text/x-jacosub",
+ .extensions = "jss,js",
+ .write_header = jacosub_write_header,
+ .write_packet = ff_raw_write_packet,
+ .flags = AVFMT_TS_NONSTRICT,
+ .subtitle_codec = CODEC_ID_JACOSUB,
+};
--
1.7.10
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