[FFmpeg-cvslog] avformat: Auto-detect mjpeg 2000 in mpeg-ts
Ståle Kristoffersen
git at videolan.org
Sun Dec 18 01:13:43 EET 2016
ffmpeg | branch: master | Ståle Kristoffersen <staalebk at ifi.uio.no> | Tue Oct 11 15:36:40 2016 +0200| [d8b9bef1a06e3592122613391d951bdbb4c74d46] | committer: Michael Niedermayer
avformat: Auto-detect mjpeg 2000 in mpeg-ts
This makes it possible to decode motion jpeg 2000
encoded in a transport stream without a correct PMT/PAT.
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d8b9bef1a06e3592122613391d951bdbb4c74d46
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/mj2kdec.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
libavformat/utils.c | 1 +
libavformat/version.h | 2 +-
5 files changed, 58 insertions(+), 1 deletion(-)
diff --git a/libavformat/Makefile b/libavformat/Makefile
index f803d04..119e46b 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -274,6 +274,7 @@ OBJS-$(CONFIG_MD5_MUXER) += hashenc.o
OBJS-$(CONFIG_MGSTS_DEMUXER) += mgsts.o
OBJS-$(CONFIG_MICRODVD_DEMUXER) += microdvddec.o subtitles.o
OBJS-$(CONFIG_MICRODVD_MUXER) += microdvdenc.o
+OBJS-$(CONFIG_MJPEG_2000_DEMUXER) += rawdec.o mj2kdec.o
OBJS-$(CONFIG_MJPEG_DEMUXER) += rawdec.o
OBJS-$(CONFIG_MJPEG_MUXER) += rawenc.o
OBJS-$(CONFIG_MLP_DEMUXER) += rawdec.o mlpdec.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 9d77b9c..6a79b75 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -183,6 +183,7 @@ void av_register_all(void)
REGISTER_DEMUXER (MGSTS, mgsts);
REGISTER_MUXDEMUX(MICRODVD, microdvd);
REGISTER_MUXDEMUX(MJPEG, mjpeg);
+ REGISTER_DEMUXER (MJPEG_2000, mjpeg_2000);
REGISTER_MUXDEMUX(MLP, mlp);
REGISTER_DEMUXER (MLV, mlv);
REGISTER_DEMUXER (MM, mm);
diff --git a/libavformat/mj2kdec.c b/libavformat/mj2kdec.c
new file mode 100644
index 0000000..1fb9409
--- /dev/null
+++ b/libavformat/mj2kdec.c
@@ -0,0 +1,54 @@
+/*
+ * MJPEG 2000 Demuxer
+ * Copyright (c) 2016 Ståle Kristoffersen
+ *
+ * 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/intreadwrite.h"
+#include "avformat.h"
+#include "rawdec.h"
+
+#if CONFIG_MJPEG_2000_DEMUXER
+static int mjpeg2000_probe(AVProbeData *p)
+{
+ const uint8_t *b = p->buf;
+ int i, marker, marker_size;
+ int frames = 0, invalid = 0;
+
+ for (i = 0; i < p->buf_size - 5; i++) {
+ if (AV_RB32(b) == 0xff4fff51){
+ marker_size = AV_RB16(b+4);
+ if (marker_size + i < p->buf_size - 4) {
+ marker = AV_RB8(b+4+marker_size);
+ if (marker == 0xff)
+ frames++;
+ else
+ invalid++;
+ }
+ }
+ b += 1;
+ }
+ if (invalid*4 + 1 < frames) {
+ if (invalid == 0 && frames > 2)
+ return AVPROBE_SCORE_EXTENSION / 2;
+ return AVPROBE_SCORE_EXTENSION / 4;
+ }
+ return 0;
+}
+FF_DEF_RAWVIDEO_DEMUXER2(mjpeg_2000, "raw MJPEG 2000 video", mjpeg2000_probe, "j2k", AV_CODEC_ID_JPEG2000, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
+#endif
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 8973529..50a30f6 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -328,6 +328,7 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
{ "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
{ "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
{ "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
+ { "mjpeg_2000",AV_CODEC_ID_JPEG2000, AVMEDIA_TYPE_VIDEO },
{ "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
{ "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
{ "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
diff --git a/libavformat/version.h b/libavformat/version.h
index b68ab51..65e6a4c 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,7 +32,7 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 57
-#define LIBAVFORMAT_VERSION_MINOR 60
+#define LIBAVFORMAT_VERSION_MINOR 61
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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