Signed-off-by: Paul B Mahol
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/dcstr.c | 79
3 files changed, 81 insertions(+)
create mode 100644 libavformat/dcstr.c
diff --git a/libavformat/Makefile b/libavformat/Makefile
index c3d9e18..27aefcb 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -127,6 +127,7 @@ OBJS-$(CONFIG_DATA_MUXER)+= rawdec.o
OBJS-$(CONFIG_DASH_MUXER)+= dashenc.o isom.o
OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
OBJS-$(CONFIG_DAUD_MUXER)+= daudenc.o
+OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o
OBJS-$(CONFIG_DFA_DEMUXER) += dfa.o
OBJS-$(CONFIG_DIRAC_DEMUXER) += diracdec.o rawdec.o
OBJS-$(CONFIG_DIRAC_MUXER) += rawenc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index a67a226..fc42cb7 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -109,6 +109,7 @@ void av_register_all(void)
REGISTER_MUXER (DASH, dash);
REGISTER_MUXDEMUX(DATA, data);
REGISTER_MUXDEMUX(DAUD, daud);
+REGISTER_DEMUXER (DCSTR,dcstr);
REGISTER_DEMUXER (DFA, dfa);
REGISTER_MUXDEMUX(DIRAC,dirac);
REGISTER_MUXDEMUX(DNXHD,dnxhd);
diff --git a/libavformat/dcstr.c b/libavformat/dcstr.c
new file mode 100644
index 000..1baa723
--- /dev/null
+++ b/libavformat/dcstr.c
@@ -0,0 +1,79 @@
+/*
+ * DC STR demuxer
+ * Copyright (c) 2015 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 "avformat.h"
+#include "internal.h"
+
+static int dcstr_probe(AVProbeData *p)
+{
+if (p->buf_size < 224 || memcmp(p->buf + 213, "Sega Stream", 11))
+return 0;
+
+return AVPROBE_SCORE_MAX;
+}
+
+static int dcstr_read_header(AVFormatContext *s)
+{
+unsigned codec, align;
+AVStream *st;
+
+st = avformat_new_stream(s, NULL);
+if (!st)
+return AVERROR(ENOMEM);
+
+st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+st->codec->channels= avio_rl32(s->pb);
+st->codec->sample_rate = avio_rl32(s->pb);
+codec = avio_rl32(s->pb);
+align = avio_rl32(s->pb);
+avio_skip(s->pb, 4);
+st->duration = avio_rl32(s->pb);
+st->codec->channels *= avio_rl32(s->pb);
+if (!align || align > INT_MAX / st->codec->channels)
+return AVERROR_INVALIDDATA;
+st->codec->block_align = align * st->codec->channels;
+
+switch (codec) {
+case 4: st->codec->codec_id = AV_CODEC_ID_ADPCM_AICA; break;
+case 16: st->codec->codec_id = AV_CODEC_ID_PCM_S16LE_PLANAR; break;
+default: avpriv_request_sample(s, "codec %X", codec);
+}
+
+avio_skip(s->pb, 0x800 - avio_tell(s->pb));
+avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+return 0;
+}
+
+static int dcstr_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+AVCodecContext *codec = s->streams[0]->codec;
+return av_get_packet(s->pb, pkt, codec->block_align);
+}
+
+AVInputFormat ff_dcstr_demuxer = {
+.name = "dcstr",
+.long_name = NULL_IF_CONFIG_SMALL("Sega DC STR"),
+.read_probe = dcstr_probe,
+.read_header= dcstr_read_header,
+.read_packet= dcstr_read_packet,
+.extensions = "str",
+};
--
1.9.1
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