SubViewer demuxer and decoder.

Changelog

@@ -25,8 +25,7 @@ version next:
 - RTMPTE protocol support
 - showwaves filter
 - LucasArts SMUSH playback support
-- SAMI demuxer and decoder
-- RealText demuxer and decoder
+- SAMI, RealText and SubViewer demuxers and decoders
 - Heart Of Darkness PAF playback support
 - iec61883 device
 - asettb filter

doc/general.texi

@@ -885,6 +885,7 @@ performance on systems without hardware floating point support).
 @item RealText         @tab   @tab X @tab   @tab X
 @item SAMI             @tab   @tab X @tab   @tab X
 @item SubRip (SRT)     @tab X @tab X @tab X @tab X
+@item SubViewer        @tab   @tab X @tab   @tab X
 @item 3GPP Timed Text  @tab   @tab   @tab   @tab X
 @item XSUB             @tab   @tab   @tab X @tab X
 @end multitable

libavcodec/Makefile

@@ -426,6 +426,7 @@ OBJS-$(CONFIG_SONIC_LS_ENCODER)        += sonic.o
 OBJS-$(CONFIG_SP5X_DECODER)            += sp5xdec.o mjpegdec.o mjpeg.o
 OBJS-$(CONFIG_SRT_DECODER)             += srtdec.o ass.o
 OBJS-$(CONFIG_SRT_ENCODER)             += srtenc.o ass_split.o
+OBJS-$(CONFIG_SUBVIEWER_DECODER)       += subviewerdec.o ass.o
 OBJS-$(CONFIG_SUNRAST_DECODER)         += sunrast.o
 OBJS-$(CONFIG_SUNRAST_ENCODER)         += sunrastenc.o
 OBJS-$(CONFIG_SVQ1_DECODER)            += svq1dec.o svq1.o h263.o \

libavcodec/allcodecs.c

@@ -414,6 +414,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (REALTEXT, realtext);
     REGISTER_DECODER (SAMI, sami);
     REGISTER_ENCDEC  (SRT, srt);
+    REGISTER_DECODER (SUBVIEWER, subviewer);
     REGISTER_ENCDEC  (XSUB, xsub);
 
     /* external libraries */

libavcodec/avcodec.h

@@ -438,6 +438,7 @@ enum CodecID {
     CODEC_ID_JACOSUB    = MKBETAG('J','S','U','B'),
     CODEC_ID_SAMI       = MKBETAG('S','A','M','I'),
     CODEC_ID_REALTEXT   = MKBETAG('R','T','X','T'),
+    CODEC_ID_SUBVIEWER  = MKBETAG('S','u','b','V'),
 
     /* 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.

libavcodec/subviewerdec.c

+/*
+ * 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
+ * SubViewer subtitle decoder
+ * @see https://en.wikipedia.org/wiki/SubViewer
+ */
+
+#include "avcodec.h"
+#include "ass.h"
+#include "libavutil/bprint.h"
+
+static int subviewer_event_to_ass(AVBPrint *buf, const char *p)
+{
+    while (*p) {
+        char c;
+
+        if (sscanf(p, "%*u:%*u:%*u.%*u,%*u:%*u:%*u.%*u%c", &c) == 1)
+            p += strcspn(p, "\n") + 1;
+        if (!strncmp(p, "[br]", 4)) {
+            av_bprintf(buf, "\\N");
+            p += 4;
+        } else {
+            if (p[0] == '\n' && p[1])
+                av_bprintf(buf, "\\N");
+            else if (*p != '\r')
+                av_bprint_chars(buf, *p, 1);
+            p++;
+        }
+    }
+
+    av_bprintf(buf, "\r\n");
+    return 0;
+}
+
+static int subviewer_decode_frame(AVCodecContext *avctx,
+                                  void *data, int *got_sub_ptr, AVPacket *avpkt)
+{
+    AVSubtitle *sub = data;
+    const char *ptr = avpkt->data;
+    AVBPrint buf;
+
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
+    // note: no need to rescale pts & duration since they are in the same
+    // timebase as ASS (1/100)
+    if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr))
+        ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0);
+    *got_sub_ptr = sub->num_rects > 0;
+    av_bprint_finalize(&buf, NULL);
+    return avpkt->size;
+}
+
+AVCodec ff_subviewer_decoder = {
+    .name           = "subviewer",
+    .long_name      = NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
+    .type           = AVMEDIA_TYPE_SUBTITLE,
+    .id             = CODEC_ID_SUBVIEWER,
+    .decode         = subviewer_decode_frame,
+    .init           = ff_ass_subtitle_header_default,
+};

libavcodec/version.h

@@ -27,8 +27,8 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR  44
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR  45
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \

libavformat/Makefile

@@ -324,6 +324,7 @@ OBJS-$(CONFIG_SPDIF_MUXER)               += spdif.o spdifenc.o
 OBJS-$(CONFIG_SRT_DEMUXER)               += srtdec.o
 OBJS-$(CONFIG_SRT_MUXER)                 += srtenc.o
 OBJS-$(CONFIG_STR_DEMUXER)               += psxstr.o
+OBJS-$(CONFIG_SUBVIEWER_DEMUXER)         += subviewerdec.o
 OBJS-$(CONFIG_SWF_DEMUXER)               += swfdec.o
 OBJS-$(CONFIG_SWF_MUXER)                 += swfenc.o
 OBJS-$(CONFIG_THP_DEMUXER)               += thp.o

libavformat/allformats.c

@@ -229,6 +229,7 @@ void av_register_all(void)
     REGISTER_MUXDEMUX (SPDIF, spdif);
     REGISTER_MUXDEMUX (SRT, srt);
     REGISTER_DEMUXER  (STR, str);
+    REGISTER_DEMUXER  (SUBVIEWER, subviewer);
     REGISTER_MUXDEMUX (SWF, swf);
     REGISTER_MUXER    (TG2, tg2);
     REGISTER_MUXER    (TGP, tgp);

libavformat/subviewerdec.c

+/*
+ * 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
+ * SubViewer subtitle demuxer
+ * @see https://en.wikipedia.org/wiki/SubViewer
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "subtitles.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
+#include "libavutil/intreadwrite.h"
+
+typedef struct {
+    FFDemuxSubtitlesQueue q;
+} SubViewerContext;
+
+static int subviewer_probe(AVProbeData *p)
+{
+    char c;
+    const unsigned char *ptr = p->buf;
+
+    if (AV_RB24(ptr) == 0xEFBBBF)
+        ptr += 3;  /* skip UTF-8 BOM */
+    if (sscanf(ptr, "%*u:%*u:%*u.%*u,%*u:%*u:%*u.%*u%c", &c) == 1)
+        return AVPROBE_SCORE_MAX/2;
+    if (!strncmp(ptr, "[INFORMATION]", 13))
+        return AVPROBE_SCORE_MAX/3;
+    return 0;
+}
+
+static int read_ts(const char *s, int64_t *start, int *duration)
+{
+    int64_t end;
+    int hh1, mm1, ss1, ms1;
+    int hh2, mm2, ss2, ms2;
+
+    if (sscanf(s, "%u:%u:%u.%u,%u:%u:%u.%u",
+               &hh1, &mm1, &ss1, &ms1, &hh2, &mm2, &ss2, &ms2) == 8) {
+        end    = (hh2*3600 + mm2*60 + ss2) * 100 + ms2;
+        *start = (hh1*3600 + mm1*60 + ss1) * 100 + ms1;
+        *duration = end - *start;
+        return 0;
+    }
+    return -1;
+}
+
+static int subviewer_read_header(AVFormatContext *s)
+{
+    SubViewerContext *subviewer = s->priv_data;
+    AVStream *st = avformat_new_stream(s, NULL);
+    AVBPrint header;
+    int res = 0;
+
+    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_SUBVIEWER;
+
+    av_bprint_init(&header, 0, AV_BPRINT_SIZE_UNLIMITED);
+
+    while (!url_feof(s->pb)) {
+        char line[2048];
+        const int64_t pos = avio_tell(s->pb);
+        int len = ff_get_line(s->pb, line, sizeof(line));
+
+        if (!len)
+            break;
+
+        if (line[0] == '[' && strncmp(line, "[br]", 4)) {
+
+            /* ignore event style, XXX: add to side_data? */
+            if (strstr(line, "[COLF]") || strstr(line, "[SIZE]") ||
+                strstr(line, "[FONT]") || strstr(line, "[STYLE]"))
+                continue;
+
+            if (!st->codec->extradata) { // header not finalized yet
+                av_bprintf(&header, "%s", line);
+                if (!strncmp(line, "[END INFORMATION]", 17) || !strncmp(line, "[SUBTITLE]", 10)) {
+                    /* end of header */
+                    av_bprint_finalize(&header, (char **)&st->codec->extradata);
+                    if (!st->codec->extradata) {
+                        res = AVERROR(ENOMEM);
+                        goto end;
+                    }
+                    st->codec->extradata_size = header.len + 1;
+                } else if (strncmp(line, "[INFORMATION]", 13)) {
+                    /* assume file metadata at this point */
+                    int i, j = 0;
+                    char key[32], value[128];
+
+                    for (i = 1; i < sizeof(key) - 1 && line[i] && line[i] != ']'; i++)
+                        key[i - 1] = av_tolower(line[i]);
+                    key[i - 1] = 0;
+
+                    if (line[i] == ']')
+                        i++;
+                    while (line[i] == ' ')
+                        i++;
+                    while (j < sizeof(value) - 1 && line[i] && !strchr("]\r\n", line[i]))
+                        value[j++] = line[i++];
+                    value[j] = 0;
+
+                    av_dict_set(&s->metadata, key, value, 0);
+                }
+            }
+        } else {
+            int64_t pts_start = AV_NOPTS_VALUE;
+            int duration = -1;
+            int timed_line = !read_ts(line, &pts_start, &duration);
+            AVPacket *sub;
+
+            sub = ff_subtitles_queue_insert(&subviewer->q, line, len, !timed_line);
+            if (!sub) {
+                res = AVERROR(ENOMEM);
+                goto end;
+            }
+            if (timed_line) {
+                sub->pos = pos;
+                sub->pts = pts_start;
+                sub->duration = duration;
+            }
+        }
+    }
+
+    ff_subtitles_queue_finalize(&subviewer->q);
+
+end:
+    av_bprint_finalize(&header, NULL);
+    return res;
+}
+
+static int subviewer_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    SubViewerContext *subviewer = s->priv_data;
+    return ff_subtitles_queue_read_packet(&subviewer->q, pkt);
+}
+
+static int subviewer_read_close(AVFormatContext *s)
+{
+    SubViewerContext *subviewer = s->priv_data;
+    ff_subtitles_queue_clean(&subviewer->q);
+    return 0;
+}
+
+AVInputFormat ff_subviewer_demuxer = {
+    .name           = "subviewer",
+    .long_name      = NULL_IF_CONFIG_SMALL("SubViewer subtitle format"),
+    .priv_data_size = sizeof(SubViewerContext),
+    .read_probe     = subviewer_probe,
+    .read_header    = subviewer_read_header,
+    .read_packet    = subviewer_read_packet,
+    .read_close     = subviewer_read_close,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "sub",
+};

libavformat/version.h

@@ -30,8 +30,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 20
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MINOR 21
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \

tests/fate/subtitles.mak

@@ -16,5 +16,8 @@ fate-sub-sami: CMD = md5 -i $(SAMPLES)/sub/SAMI_capability_tester.smi -f ass
 FATE_SUBTITLES += fate-sub-srt
 fate-sub-srt: CMD = md5 -i $(SAMPLES)/sub/SubRip_capability_tester.srt -f ass
 
+FATE_SUBTITLES += fate-sub-subviewer
+fate-sub-subviewer: CMD = md5 -i $(SAMPLES)/sub/SubViewer_capability_tester.sub -f ass
+
 FATE_SAMPLES_FFMPEG += $(FATE_SUBTITLES)
 fate-subtitles: $(FATE_SUBTITLES)

tests/ref/fate/sub-subviewer

+303c25863d2283928c19db58a53c93e2