[FFmpeg-devel] [PATCH] lavf: VobSub demuxer.
Clément Bœsch
ubitux at gmail.com
Fri Nov 30 06:23:31 CET 2012
---
Now working.
The seek is not implemented yet since I need to finish the generic seeking for
the FFDemuxSubtitlesQueue API (it should apply to this demuxer as well just
fine). So it's not exactly yet usable for players (but will very soon).
OTOH, you can now remux VobSub into a container supporting it, by focusing on
the .IDX file:
ffmpeg -i movie.avi -i movie.idx -map 0 -map 1 -c copy out.mkv
---
Changelog | 1 +
configure | 1 +
doc/general.texi | 1 +
libavformat/allformats.c | 1 +
libavformat/mpeg.c | 231 +++++++++++++++++++++++++++++++++++++++++++++++
libavformat/version.h | 2 +-
6 files changed, 236 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 5d605c6..8562e7c 100644
--- a/Changelog
+++ b/Changelog
@@ -31,6 +31,7 @@ version <next>:
- ffprobe -sections option
- ADPCM IMA Dialogic decoder
- BRSTM demuxer
+- VobSub demuxer
version 1.0:
diff --git a/configure b/configure
index a7990f5..7064ccc 100755
--- a/configure
+++ b/configure
@@ -1863,6 +1863,7 @@ spdif_muxer_select="aac_parser"
tak_demuxer_select="tak_parser"
tg2_muxer_select="mov_muxer"
tgp_muxer_select="mov_muxer"
+vobsub_demuxer_select="mpegps_demuxer"
w64_demuxer_deps="wav_demuxer"
# indevs / outdevs
diff --git a/doc/general.texi b/doc/general.texi
index 762b94e..d618b61 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -921,6 +921,7 @@ performance on systems without hardware floating point support).
@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
+ at item VobSub (IDX+SUB) @tab @tab X @tab @tab X
@item 3GPP Timed Text @tab @tab @tab X @tab X
@item WebVTT @tab @tab X @tab @tab X
@item XSUB @tab @tab @tab X @tab X
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index e183d40..b7b3e68 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -254,6 +254,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX (VC1T, vc1t);
REGISTER_DEMUXER (VIVO, vivo);
REGISTER_DEMUXER (VMD, vmd);
+ REGISTER_DEMUXER (VOBSUB, vobsub);
REGISTER_MUXDEMUX (VOC, voc);
REGISTER_DEMUXER (VQF, vqf);
REGISTER_DEMUXER (W64, w64);
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 22e7869..038cf79 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -23,6 +23,11 @@
#include "internal.h"
#include "mpeg.h"
+#if CONFIG_VOBSUB_DEMUXER
+# include "subtitles.h"
+# include "libavutil/bprint.h"
+#endif
+
#undef NDEBUG
#include <assert.h>
@@ -103,6 +108,10 @@ typedef struct MpegDemuxContext {
int32_t header_state;
unsigned char psm_es_type[256];
int sofdec;
+#if CONFIG_VOBSUB_DEMUXER
+ AVFormatContext *sub_ctx;
+ FFDemuxSubtitlesQueue q;
+#endif
} MpegDemuxContext;
static int mpegps_read_header(AVFormatContext *s)
@@ -574,3 +583,225 @@ AVInputFormat ff_mpegps_demuxer = {
.read_timestamp = mpegps_read_dts,
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
};
+
+#if CONFIG_VOBSUB_DEMUXER
+
+#define REF_STRING "# VobSub index file,"
+
+static int vobsub_probe(AVProbeData *p)
+{
+ if (!strncmp(p->buf, REF_STRING, sizeof(REF_STRING) - 1))
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+static int vobsub_read_header(AVFormatContext *s)
+{
+ int i, header_size, ret = 0, header_parsed = 0, langidx = 0;
+ MpegDemuxContext *vobsub = s->priv_data;
+ char *sub_name = NULL;
+ size_t fname_len;
+ char *ext, *header_str;
+ AVBPrint header;
+ int64_t delay = 0;
+ AVStream *st = NULL;
+
+ sub_name = av_strdup(s->filename);
+ fname_len = strlen(sub_name);
+ ext = sub_name - 3 + fname_len;
+ if (fname_len < 4 || *(ext - 1) != '.') {
+ av_log(s, AV_LOG_ERROR, "The input index filename is too short "
+ "to guess the associated .SUB file\n");
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
+ memcpy(ext, !strncmp(ext, "IDX", 3) ? "SUB" : "sub", 3);
+ av_log(s, AV_LOG_VERBOSE, "IDX/SUB: %s -> %s\n", s->filename, sub_name);
+ ret = avformat_open_input(&vobsub->sub_ctx, sub_name, &ff_mpegps_demuxer, NULL);
+ if (ret < 0) {
+ av_log(s, AV_LOG_ERROR, "Unable to open %s as MPEG subtitles\n", sub_name);
+ goto end;
+ }
+
+ av_bprint_init(&header, 0, AV_BPRINT_SIZE_UNLIMITED);
+ while (!url_feof(s->pb)) {
+ char line[2048];
+ int len = ff_get_line(s->pb, line, sizeof(line));
+
+ if (!len)
+ break;
+
+ line[strcspn(line, "\r\n")] = 0;
+
+ if (!strncmp(line, "id:", 3)) {
+ int n, stream_id = 0;
+ char id[64] = {0};
+
+ n = sscanf(line, "id: %63[^,], index: %u", id, &stream_id);
+ if (n != 2) {
+ av_log(s, AV_LOG_WARNING, "Unable to parse index line '%s', "
+ "assuming 'id: und, index: 0'\n", line);
+ strcpy(id, "und");
+ stream_id = 0;
+ }
+
+ st = avformat_new_stream(s, NULL);
+ if (!st) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ st->id = stream_id;
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codec->codec_id = AV_CODEC_ID_DVD_SUBTITLE;
+ av_dict_set(&st->metadata, "language", id, 0);
+ av_log(s, AV_LOG_DEBUG, "IDX stream[%d] id=%s\n", stream_id, id);
+ header_parsed = 1;
+
+ } else if (st && !strncmp(line, "timestamp:", 10)) {
+ AVPacket *sub;
+ int hh, mm, ss, ms;
+ int64_t pos, timestamp;
+ const char *p = line + 10;
+
+ if (sscanf(p, "%02d:%02d:%02d:%03d, filepos: %"PRIx64,
+ &hh, &mm, &ss, &ms, &pos) != 5) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse timestamp line '%s', "
+ "abort parsing\n", line);
+ break;
+ }
+ timestamp = (hh*3600LL + mm*60LL + ss) * 1000LL + ms + delay;
+ timestamp = av_rescale_q(timestamp, (AVRational){1,1000}, st->time_base);
+
+ sub = ff_subtitles_queue_insert(&vobsub->q, "", 0, 0);
+ if (!sub) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ sub->pos = pos;
+ sub->pts = timestamp;
+ sub->stream_index = s->nb_streams - 1;
+
+ } else if (st && !strncmp(line, "alt:", 4)) {
+ const char *p = line + 4;
+
+ while (*p == ' ')
+ p++;
+ av_dict_set(&st->metadata, "title", p, 0);
+ av_log(s, AV_LOG_DEBUG, "IDX stream[%d] name=%s\n", st->id, p);
+ header_parsed = 1;
+
+ } else if (!strncmp(line, "delay:", 6)) {
+ int sign = 1, hh = 0, mm = 0, ss = 0, ms = 0;
+ const char *p = line + 6;
+
+ while (*p == ' ')
+ p++;
+ if (*p == '-' || *p == '+') {
+ sign = *p == '-' ? -1 : 1;
+ p++;
+ }
+ sscanf(p, "%d:%d:%d:%d", &hh, &mm, &ss, &ms);
+ delay = ((hh*3600LL + mm*60LL + ss) * 1000LL + ms) * sign;
+
+ } else if (!strncmp(line, "langidx:", 8)) {
+ const char *p = line + 8;
+
+ if (sscanf(p, "%d", &langidx) != 1)
+ av_log(s, AV_LOG_ERROR, "Invalid langidx specified\n");
+
+ } else if (!header_parsed) {
+ if (line[0] && line[0] != '#')
+ av_bprintf(&header, "%s\n", line);
+ }
+ }
+
+ if (langidx < s->nb_streams)
+ s->streams[langidx]->disposition |= AV_DISPOSITION_DEFAULT;
+
+ ff_subtitles_queue_finalize(&vobsub->q);
+
+ if (!av_bprint_is_complete(&header)) {
+ av_bprint_finalize(&header, NULL);
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ av_bprint_finalize(&header, &header_str);
+ header_size = header.len + 1;
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *sub_st = s->streams[i];
+ sub_st->codec->extradata = av_strdup(header_str);
+ sub_st->codec->extradata_size = header_size;
+ }
+
+end:
+ av_free(sub_name);
+ return ret;
+}
+
+static int vobsub_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ MpegDemuxContext *vobsub = s->priv_data;
+ FFDemuxSubtitlesQueue *q = &vobsub->q;
+ AVIOContext *pb = vobsub->sub_ctx->pb;
+ int ret, psize, pkt_real_size = 0;
+ AVPacket idx_pkt;
+
+ ret = ff_subtitles_queue_read_packet(q, &idx_pkt);
+ if (ret < 0)
+ return ret;
+
+ if (q->current_sub_idx < q->nb_subs) {
+ psize = q->subs[q->current_sub_idx].pos - idx_pkt.pos;
+ } else {
+ int64_t fsize = avio_size(pb);
+ psize = fsize < 0 ? 0xffff : fsize - idx_pkt.pos;
+ }
+
+ ret = av_new_packet(pkt, psize);
+ if (ret < 0)
+ return ret;
+ pkt->pts = pkt->dts = idx_pkt.pts;
+ pkt->pos = idx_pkt.pos;
+ pkt->stream_index = idx_pkt.stream_index;
+
+ avio_seek(pb, pkt->pos, SEEK_SET);
+ for (;;) {
+ int to_read, startcode;
+ int64_t pts, dts;
+
+ ret = mpegps_read_pes_header(vobsub->sub_ctx, NULL, &startcode, &pts, &dts);
+ if (ret < 0)
+ return ret;
+
+ to_read = ret & 0xffff;
+ if (pkt_real_size + to_read > pkt->size)
+ break;
+ if ((startcode & 0x1f) == pkt->stream_index)
+ pkt_real_size += avio_read(pb, pkt->data + pkt_real_size, to_read);
+ }
+ pkt->size = pkt_real_size;
+
+ return 0;
+}
+
+static int vobsub_read_close(AVFormatContext *s)
+{
+ MpegDemuxContext *vobsub = s->priv_data;
+ ff_subtitles_queue_clean(&vobsub->q);
+ if (vobsub->sub_ctx)
+ avformat_close_input(&vobsub->sub_ctx);
+ return 0;
+}
+
+AVInputFormat ff_vobsub_demuxer = {
+ .name = "vobsub",
+ .long_name = NULL_IF_CONFIG_SMALL("VobSub subtitle format"),
+ .priv_data_size = sizeof(MpegDemuxContext),
+ .read_probe = vobsub_probe,
+ .read_header = vobsub_read_header,
+ .read_packet = vobsub_read_packet,
+ .read_close = vobsub_read_close,
+ .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
+ .extensions = "idx",
+};
+#endif
diff --git a/libavformat/version.h b/libavformat/version.h
index e0e6e4b..4bea059 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 40
+#define LIBAVFORMAT_VERSION_MINOR 41
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
--
1.8.0.1
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