[FFmpeg-cvslog] avformat: add QOA demuxer
Paul B Mahol
git at videolan.org
Sun Nov 26 18:42:18 EET 2023
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sat Sep 23 16:38:35 2023 +0200| [44e9cccffa6eef7fee8662f9e9bd88e3b04b0724] | committer: Paul B Mahol
avformat: add QOA demuxer
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=44e9cccffa6eef7fee8662f9e9bd88e3b04b0724
---
Changelog | 2 +-
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/qoadec.c | 110 +++++++++++++++++++++++++++++++++++++++++++++++
libavformat/version.h | 2 +-
5 files changed, 114 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index d945904bc0..98ea87a359 100644
--- a/Changelog
+++ b/Changelog
@@ -5,7 +5,7 @@ version <next>:
- LEAD MCMP decoder
- EVC decoding using external library libxevd
- EVC encoding using external library libxeve
-- QOA decoder
+- QOA decoder and demuxer
version 6.1:
- libaribcaption decoder
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 329055ccfd..2db83aff81 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -484,6 +484,7 @@ OBJS-$(CONFIG_PP_BNK_DEMUXER) += pp_bnk.o
OBJS-$(CONFIG_PVA_DEMUXER) += pva.o
OBJS-$(CONFIG_PVF_DEMUXER) += pvfdec.o pcm.o
OBJS-$(CONFIG_QCP_DEMUXER) += qcp.o
+OBJS-$(CONFIG_QOA_DEMUXER) += qoadec.o
OBJS-$(CONFIG_R3D_DEMUXER) += r3d.o
OBJS-$(CONFIG_RAWVIDEO_DEMUXER) += rawvideodec.o
OBJS-$(CONFIG_RAWVIDEO_MUXER) += rawenc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index d4b505a5a3..c8bb4e3866 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -383,6 +383,7 @@ extern const FFOutputFormat ff_psp_muxer;
extern const AVInputFormat ff_pva_demuxer;
extern const AVInputFormat ff_pvf_demuxer;
extern const AVInputFormat ff_qcp_demuxer;
+extern const AVInputFormat ff_qoa_demuxer;
extern const AVInputFormat ff_r3d_demuxer;
extern const AVInputFormat ff_rawvideo_demuxer;
extern const FFOutputFormat ff_rawvideo_muxer;
diff --git a/libavformat/qoadec.c b/libavformat/qoadec.c
new file mode 100644
index 0000000000..acf7c02741
--- /dev/null
+++ b/libavformat/qoadec.c
@@ -0,0 +1,110 @@
+/*
+ * QOA demuxer
+ *
+ * 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 "avio_internal.h"
+#include "internal.h"
+#include "libavutil/intreadwrite.h"
+
+static int qoa_probe(const AVProbeData *p)
+{
+ if ((p->buf_size < 16) ||
+ (AV_RB32(p->buf) != MKBETAG('q','o','a','f')) ||
+ (AV_RB32(p->buf + 4) == 0) ||
+ (p->buf[8] == 0) ||
+ (AV_RB24(p->buf + 9) == 0) ||
+ (AV_RB16(p->buf + 12) == 0) ||
+ (AV_RB16(p->buf + 14) == 0))
+ return 0;
+ return AVPROBE_SCORE_MAX;
+}
+
+static int qoa_read_header(AVFormatContext *s)
+{
+ AVIOContext *pb = s->pb;
+ AVStream *st;
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ avio_skip(pb, 4);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = AV_CODEC_ID_QOA;
+ st->duration = avio_rb32(pb);
+ st->start_time = 0;
+
+ ffio_ensure_seekback(pb, 4);
+ st->codecpar->ch_layout.nb_channels = avio_r8(pb);
+ if (st->codecpar->ch_layout.nb_channels == 0)
+ return AVERROR_INVALIDDATA;
+
+ st->codecpar->sample_rate = avio_rb24(pb);
+ if (st->codecpar->sample_rate == 0)
+ return AVERROR_INVALIDDATA;
+
+ avio_seek(pb, -4, SEEK_CUR);
+
+ avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
+
+ return 0;
+}
+
+static int qoa_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ AVIOContext *pb = s->pb;
+ uint16_t size, duration;
+ uint8_t hdr[8];
+ int64_t pos;
+ int ret;
+
+ if (avio_feof(pb))
+ return AVERROR_EOF;
+
+ pos = avio_tell(pb);
+ ret = avio_read(pb, hdr, sizeof(hdr));
+ if (ret != sizeof(hdr))
+ return AVERROR_EOF;
+
+ duration = AV_RB16(hdr + 4);
+ size = AV_RB16(hdr + 6);
+ if ((ret = av_new_packet(pkt, size)) < 0)
+ return ret;
+
+ memcpy(pkt->data, hdr, sizeof(hdr));
+ ret = avio_read(pb, pkt->data + sizeof(hdr), size - sizeof(hdr));
+ if (ret != size - sizeof(hdr))
+ return AVERROR(EIO);
+ pkt->stream_index = 0;
+ pkt->pos = pos;
+ pkt->duration = duration;
+
+ return 0;
+}
+
+const AVInputFormat ff_qoa_demuxer = {
+ .name = "qoa",
+ .long_name = NULL_IF_CONFIG_SMALL("QOA"),
+ .read_probe = qoa_probe,
+ .read_header = qoa_read_header,
+ .read_packet = qoa_read_packet,
+ .flags = AVFMT_GENERIC_INDEX,
+ .extensions = "qoa",
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index 2a28a3bf40..6a80f3ac4e 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -31,7 +31,7 @@
#include "version_major.h"
-#define LIBAVFORMAT_VERSION_MINOR 17
+#define LIBAVFORMAT_VERSION_MINOR 18
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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