[FFmpeg-cvslog] DSD Stream File (DSF) demuxer
Peter Ross
git at videolan.org
Fri Apr 18 04:39:05 CEST 2014
ffmpeg | branch: master | Peter Ross <pross at xvid.org> | Thu Apr 17 21:01:08 2014 +1000| [27998451d86d2da50a20317d0442fa0d6e77100b] | committer: Michael Niedermayer
DSD Stream File (DSF) demuxer
Signed-off-by: Peter Ross <pross at xvid.org>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=27998451d86d2da50a20317d0442fa0d6e77100b
---
doc/general.texi | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/dsfdec.c | 158 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 161 insertions(+)
diff --git a/doc/general.texi b/doc/general.texi
index b1118b9..8bf0379 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -259,6 +259,7 @@ library:
@item Deluxe Paint Animation @tab @tab X
@item DFA @tab @tab X
@tab This format is used in Chronomaster game
+ at item DSD Stream File (DSF) @tab @tab X
@item DV video @tab X @tab X
@item DXA @tab @tab X
@tab This format is used in the non-Windows version of the Feeble Files
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 3df5c88..38b7f9a 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -118,6 +118,7 @@ OBJS-$(CONFIG_DIRAC_DEMUXER) += diracdec.o rawdec.o
OBJS-$(CONFIG_DIRAC_MUXER) += rawenc.o
OBJS-$(CONFIG_DNXHD_DEMUXER) += dnxhddec.o rawdec.o
OBJS-$(CONFIG_DNXHD_MUXER) += rawenc.o
+OBJS-$(CONFIG_DSF_DEMUXER) += dsfdec.o
OBJS-$(CONFIG_DSICIN_DEMUXER) += dsicin.o
OBJS-$(CONFIG_DTSHD_DEMUXER) += dtshddec.o
OBJS-$(CONFIG_DTS_DEMUXER) += dtsdec.o rawdec.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index b5cbbef..f6d78ae 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -106,6 +106,7 @@ void av_register_all(void)
REGISTER_DEMUXER (DFA, dfa);
REGISTER_MUXDEMUX(DIRAC, dirac);
REGISTER_MUXDEMUX(DNXHD, dnxhd);
+ REGISTER_DEMUXER (DSF, dsf);
REGISTER_DEMUXER (DSICIN, dsicin);
REGISTER_MUXDEMUX(DTS, dts);
REGISTER_DEMUXER (DTSHD, dtshd);
diff --git a/libavformat/dsfdec.c b/libavformat/dsfdec.c
new file mode 100644
index 0000000..74fd7aa
--- /dev/null
+++ b/libavformat/dsfdec.c
@@ -0,0 +1,158 @@
+/*
+ * DSD Stream File (DSF) demuxer
+ * Copyright (c) 2014 Peter Ross
+ *
+ * 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 "internal.h"
+#include "id3v2.h"
+
+typedef struct {
+ uint64_t data_end;
+} DSFContext;
+
+static int dsf_probe(AVProbeData *p)
+{
+ if (p->buf_size < 12 || memcmp(p->buf, "DSD ", 4) || AV_RL64(p->buf + 4) != 28)
+ return 0;
+ return AVPROBE_SCORE_MAX;
+}
+
+static const uint64_t dsf_channel_layout[] = {
+ 0,
+ AV_CH_LAYOUT_MONO,
+ AV_CH_LAYOUT_STEREO,
+ AV_CH_LAYOUT_SURROUND,
+ AV_CH_LAYOUT_QUAD,
+ AV_CH_LAYOUT_4POINT0,
+ AV_CH_LAYOUT_5POINT0_BACK,
+ AV_CH_LAYOUT_5POINT1_BACK,
+};
+
+static void read_id3(AVFormatContext *s, uint64_t id3pos)
+{
+ ID3v2ExtraMeta *id3v2_extra_meta = NULL;
+ if (avio_seek(s->pb, id3pos, SEEK_SET) < 0)
+ return;
+
+ ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
+ if (id3v2_extra_meta)
+ ff_id3v2_parse_apic(s, &id3v2_extra_meta);
+ ff_id3v2_free_extra_meta(&id3v2_extra_meta);
+}
+
+static int dsf_read_header(AVFormatContext *s)
+{
+ DSFContext *dsf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVStream *st;
+ uint64_t id3pos;
+ unsigned int channel_type;
+
+ avio_skip(pb, 4);
+ if (avio_rl64(pb) != 28)
+ return AVERROR_INVALIDDATA;
+
+ avio_skip(pb, 8);
+ id3pos = avio_rl64(pb);
+ if (pb->seekable) {
+ read_id3(s, id3pos);
+ avio_seek(pb, 28, SEEK_SET);
+ }
+
+ /* fmt chunk */
+
+ if (avio_rl32(pb) != MKTAG('f', 'm', 't', ' ') || avio_rl64(pb) != 52)
+ return AVERROR_INVALIDDATA;
+
+ if (avio_rl32(pb) != 1) {
+ avpriv_request_sample(s, "unknown format version");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (avio_rl32(pb)) {
+ avpriv_request_sample(s, "unknown format id");
+ return AVERROR_INVALIDDATA;
+ }
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ channel_type = avio_rl32(pb);
+ if (channel_type < FF_ARRAY_ELEMS(dsf_channel_layout))
+ st->codec->channel_layout = dsf_channel_layout[channel_type];
+ if (!st->codec->channel_layout)
+ avpriv_request_sample(s, "channel type %i", channel_type);
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->channels = avio_rl32(pb);
+ st->codec->sample_rate = avio_rl32(pb) / 8;
+
+ switch(avio_rl32(pb)) {
+ case 1: st->codec->codec_id = AV_CODEC_ID_DSD_LSBF_PLANAR; break;
+ case 8: st->codec->codec_id = AV_CODEC_ID_DSD_MSBF_PLANAR; break;
+ default:
+ avpriv_request_sample(s, "unknown most significant bit");
+ return AVERROR_INVALIDDATA;
+ }
+
+ avio_skip(pb, 8);
+ st->codec->block_align = avio_rl32(pb);
+ if (st->codec->block_align > INT_MAX / st->codec->channels) {
+ avpriv_request_sample(s, "block_align overflow");
+ return AVERROR_INVALIDDATA;
+ }
+ st->codec->block_align *= st->codec->channels;
+ avio_skip(pb, 4);
+
+ /* data chunk */
+
+ dsf->data_end = avio_tell(pb);
+ if (avio_rl32(pb) != MKTAG('d', 'a', 't', 'a'))
+ return AVERROR_INVALIDDATA;
+ dsf->data_end += avio_rl64(pb);
+
+ return 0;
+}
+
+static int dsf_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ DSFContext *dsf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVStream *st = s->streams[0];
+ int64_t pos = avio_tell(pb);
+
+ if (pos >= dsf->data_end)
+ return AVERROR_EOF;
+
+ pkt->stream_index = 0;
+ return av_get_packet(pb, pkt, FFMIN(dsf->data_end - pos, st->codec->block_align));
+}
+
+AVInputFormat ff_dsf_demuxer = {
+ .name = "dsf",
+ .long_name = NULL_IF_CONFIG_SMALL("DSD Stream File (DSF)"),
+ .priv_data_size = sizeof(DSFContext),
+ .read_probe = dsf_probe,
+ .read_header = dsf_read_header,
+ .read_packet = dsf_read_packet,
+ .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
+};
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