[FFmpeg-devel] [PATCH] "Metal Gear Solid: The Twin Snakes" demuxer
Paul B Mahol
onemda at gmail.com
Wed Mar 21 23:18:54 CET 2012
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
Changelog | 1 +
doc/general.texi | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/mgsts.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++
libavformat/version.h | 2 +-
6 files changed, 108 insertions(+), 1 deletions(-)
create mode 100644 libavformat/mgsts.c
diff --git a/Changelog b/Changelog
index 6c9f551..e68537c 100644
--- a/Changelog
+++ b/Changelog
@@ -19,6 +19,7 @@ version next:
- RealAudio Lossless decoder
- ZeroCodec decoder
- tile video filter
+- Metal Gear Solid: The Twin Snakes demuxer
version 0.10:
diff --git a/doc/general.texi b/doc/general.texi
index 1acdc24..5143f83 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -210,6 +210,7 @@ library:
@item MAXIS XA @tab @tab X
@tab Used in Sim City 3000; file extension .xa.
@item MD Studio @tab @tab X
+ at item Metal Gear Solid: The Twin Snakes @tab @tab X
@item Mobotix .mxg @tab @tab X
@item Monkey's Audio @tab @tab X
@item Motion Pixels MVI @tab @tab X
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 5bf2fda..929682a 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -143,6 +143,7 @@ OBJS-$(CONFIG_MATROSKA_MUXER) += matroskaenc.o matroska.o \
isom.o avc.o \
flacenc_header.o avlanguage.o
OBJS-$(CONFIG_MD5_MUXER) += md5enc.o
+OBJS-$(CONFIG_MGSTS_DEMUXER) += mgsts.o
OBJS-$(CONFIG_MICRODVD_DEMUXER) += microdvddec.o
OBJS-$(CONFIG_MICRODVD_MUXER) += microdvdenc.o rawenc.o
OBJS-$(CONFIG_MJPEG_DEMUXER) += rawdec.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 614b341..905a165 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -134,6 +134,7 @@ void av_register_all(void)
REGISTER_MUXER (MD5, md5);
REGISTER_MUXDEMUX (MATROSKA, matroska);
REGISTER_MUXER (MATROSKA_AUDIO, matroska_audio);
+ REGISTER_DEMUXER (MGSTS, mgsts);
REGISTER_MUXDEMUX (MICRODVD, microdvd);
REGISTER_MUXDEMUX (MJPEG, mjpeg);
REGISTER_MUXDEMUX (MLP, mlp);
diff --git a/libavformat/mgsts.c b/libavformat/mgsts.c
new file mode 100644
index 0000000..3377d07
--- /dev/null
+++ b/libavformat/mgsts.c
@@ -0,0 +1,103 @@
+/*
+ * Metar Gear Solid: The Twin Snakes demuxer
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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 "libavutil/intfloat.h"
+#include "avformat.h"
+#include "riff.h"
+
+static int read_probe(AVProbeData *p)
+{
+ if (AV_RB32(p->buf ) != 0x000E ||
+ AV_RB32(p->buf + 4) != 0x0050 ||
+ AV_RB32(p->buf + 12) != 0x0034)
+ return 0;
+ return AVPROBE_SCORE_MAX;
+}
+
+static int read_header(AVFormatContext *s)
+{
+ AVIOContext *pb = s->pb;
+ AVStream *st;
+ AVRational fps;
+ uint32_t chunk_size;
+
+ avio_skip(pb, 4);
+ chunk_size = avio_rb32(pb);
+ if (chunk_size != 80)
+ return AVERROR(EIO);
+ avio_skip(pb, 20);
+
+ st = avformat_new_stream(s, 0);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->start_time = 0;
+ st->nb_frames =
+ st->duration = avio_rb32(pb);
+ fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
+ st->codec->width = avio_rb32(pb);
+ st->codec->height = avio_rb32(pb);
+ avio_skip(pb, 12);
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_tag = avio_rb32(pb);
+ st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
+ st->codec->codec_tag);
+ avpriv_set_pts_info(st, 64, fps.den, fps.num);
+ avio_skip(pb, 20);
+
+ return 0;
+}
+
+static int read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ AVIOContext *pb = s->pb;
+ uint32_t chunk_size, payload_size;
+ int ret;
+
+ if (url_feof(pb))
+ return AVERROR_EOF;
+
+ avio_skip(pb, 4);
+ chunk_size = avio_rb32(pb);
+ avio_skip(pb, 4);
+ payload_size = avio_rb32(pb);
+
+ if (chunk_size < payload_size + 16)
+ return AVERROR(EIO);
+
+ ret = av_get_packet(pb, pkt, payload_size);
+ if (ret < 0)
+ return ret;
+
+ pkt->duration = 1;
+ avio_skip(pb, chunk_size - (ret + 16));
+
+ return ret;
+}
+
+AVInputFormat ff_mgsts_demuxer = {
+ .name = "mgsts",
+ .long_name = NULL_IF_CONFIG_SMALL("Metal Gear Solid: The Twin Snakes"),
+ .read_probe = read_probe,
+ .read_header = read_header,
+ .read_packet = read_packet,
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index 5969f92..7c4d8e7 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 2
+#define LIBAVFORMAT_VERSION_MINOR 3
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
--
1.7.7
More information about the ffmpeg-devel
mailing list