avformat: add QOA demuxer

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

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

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;

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",
+};

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, \