[FFmpeg-cvslog] avformat: add WavArc demuxer
Paul B Mahol
git at videolan.org
Sat Feb 4 10:41:45 EET 2023
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sat Jan 21 19:17:38 2023 +0100| [4e3e70c19dc6257a97c0cac5dabb3fc9846aa76f] | committer: Paul B Mahol
avformat: add WavArc demuxer
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4e3e70c19dc6257a97c0cac5dabb3fc9846aa76f
---
Changelog | 2 +-
doc/general_contents.texi | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/version.h | 2 +-
libavformat/wavarc.c | 126 ++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 131 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index 2d2206e1ba..7c3bd7f80c 100644
--- a/Changelog
+++ b/Changelog
@@ -37,7 +37,7 @@ version <next>:
- XMD ADPCM decoder and demuxer
- media100 to mjpegb bsf
- ffmpeg CLI new option: -fix_sub_duration_heartbeat
-- WavArc decoder
+- WavArc decoder and demuxer
version 5.1:
diff --git a/doc/general_contents.texi b/doc/general_contents.texi
index 84df3432cf..33f3c18c7a 100644
--- a/doc/general_contents.texi
+++ b/doc/general_contents.texi
@@ -707,6 +707,7 @@ library:
@tab Audio format used in Sony PS games.
@item Marble WADY @tab @tab X
@item WAV @tab X @tab X
+ at item Waveform Archiver @tab @tab X
@item WavPack @tab X @tab X
@item WebM @tab X @tab X
@item Windows Televison (WTV) @tab X @tab X
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 0bb9e8c19a..d68b78ce34 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -598,6 +598,7 @@ OBJS-$(CONFIG_VQF_DEMUXER) += vqf.o
OBJS-$(CONFIG_W64_DEMUXER) += wavdec.o w64.o pcm.o
OBJS-$(CONFIG_W64_MUXER) += wavenc.o w64.o
OBJS-$(CONFIG_WADY_DEMUXER) += wady.o pcm.o
+OBJS-$(CONFIG_WAVARC_DEMUXER) += wavarc.o rawdec.o
OBJS-$(CONFIG_WAV_DEMUXER) += wavdec.o pcm.o
OBJS-$(CONFIG_WAV_MUXER) += wavenc.o
OBJS-$(CONFIG_WC3_DEMUXER) += wc3movie.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 2d31956fd5..b5a3d909bd 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -480,6 +480,7 @@ extern const AVInputFormat ff_vqf_demuxer;
extern const AVInputFormat ff_w64_demuxer;
extern const AVOutputFormat ff_w64_muxer;
extern const AVInputFormat ff_wady_demuxer;
+extern const AVInputFormat ff_wavarc_demuxer;
extern const AVInputFormat ff_wav_demuxer;
extern const AVOutputFormat ff_wav_muxer;
extern const AVInputFormat ff_wc3_demuxer;
diff --git a/libavformat/version.h b/libavformat/version.h
index 789859fbe2..134cdb2b89 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -31,7 +31,7 @@
#include "version_major.h"
-#define LIBAVFORMAT_VERSION_MINOR 37
+#define LIBAVFORMAT_VERSION_MINOR 38
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
diff --git a/libavformat/wavarc.c b/libavformat/wavarc.c
new file mode 100644
index 0000000000..41ee817a1e
--- /dev/null
+++ b/libavformat/wavarc.c
@@ -0,0 +1,126 @@
+/*
+ * WavArc demuxer
+ * Copyright (c) 2023 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/channel_layout.h"
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "demux.h"
+#include "internal.h"
+#include "rawdec.h"
+
+static int wavarc_probe(const AVProbeData *p)
+{
+ int len = p->buf[0];
+ uint32_t id;
+
+ if (len == 0 || len + 6 >= p->buf_size)
+ return 0;
+
+ if (p->buf[len + 1] != 0)
+ return 0;
+
+ id = AV_RL32(p->buf + len + 2);
+ if (id != MKTAG('1','D','I','F') &&
+ id != MKTAG('2','S','L','P') &&
+ id != MKTAG('3','N','L','P') &&
+ id != MKTAG('4','A','L','P') &&
+ id != MKTAG('5','E','L','P'))
+ return 0;
+
+ return AVPROBE_SCORE_MAX / 3 * 2;
+}
+
+static int wavarc_read_header(AVFormatContext *s)
+{
+ AVIOContext *pb = s->pb;
+ AVCodecParameters *par;
+ int filename_len, fmt_len, ret;
+ uint8_t data[36];
+ AVStream *st;
+ uint32_t id;
+
+ filename_len = avio_r8(pb);
+ if (filename_len == 0)
+ return AVERROR_INVALIDDATA;
+ avio_skip(pb, filename_len);
+ if (avio_r8(pb))
+ return AVERROR_INVALIDDATA;
+ id = avio_rl32(pb);
+ if (avio_read(pb, data, sizeof(data)) != sizeof(data))
+ return AVERROR(EIO);
+ fmt_len = AV_RL32(data + 32);
+ if (fmt_len < 12)
+ return AVERROR_INVALIDDATA;
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ par = st->codecpar;
+
+ ret = ff_alloc_extradata(par, fmt_len + sizeof(data));
+ if (ret < 0)
+ return ret;
+ memcpy(par->extradata, data, sizeof(data));
+ avio_read(pb, par->extradata + sizeof(data), fmt_len);
+
+ par->codec_type = AVMEDIA_TYPE_AUDIO;
+ par->codec_id = AV_CODEC_ID_WAVARC;
+ par->codec_tag = id;
+
+ do {
+ id = avio_rl32(pb);
+ if (id != MKTAG('d','a','t','a'))
+ avio_skip(pb, avio_rl32(pb));
+ } while (id != MKTAG('d','a','t','a'));
+ avio_skip(pb, 4);
+
+ if (AV_RL32(par->extradata + 16) != MKTAG('R','I','F','F'))
+ return AVERROR_INVALIDDATA;
+ if (AV_RL32(par->extradata + 24) != MKTAG('W','A','V','E'))
+ return AVERROR_INVALIDDATA;
+ if (AV_RL32(par->extradata + 28) != MKTAG('f','m','t',' '))
+ return AVERROR_INVALIDDATA;
+
+ av_channel_layout_default(&par->ch_layout, AV_RL16(par->extradata + 38));
+ par->sample_rate = AV_RL32(par->extradata + 40);
+ avpriv_set_pts_info(st, 64, 1, par->sample_rate);
+ st->start_time = 0;
+
+ switch (par->extradata[36]) {
+ case 0: par->format = AV_SAMPLE_FMT_U8P; break;
+ case 1: par->format = AV_SAMPLE_FMT_S16P; break;
+ }
+
+ return 0;
+}
+
+const AVInputFormat ff_wavarc_demuxer = {
+ .name = "wavarc",
+ .long_name = NULL_IF_CONFIG_SMALL("Waveform Archiver"),
+ .read_probe = wavarc_probe,
+ .read_packet = ff_raw_read_partial_packet,
+ .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
+ .read_header = wavarc_read_header,
+ .extensions = "wa",
+ .raw_codec_id = AV_CODEC_ID_WAVARC,
+ .priv_data_size = sizeof(FFRawDemuxerContext),
+ .priv_class = &ff_raw_demuxer_class,
+};
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