diff --git a/configure b/configure
index 6ceb0c7af4..29a2b38629 100755
--- a/configure
+++ b/configure
@@ -2129,6 +2129,7 @@ HEADERS_LIST="
     sys_resource_h
     sys_select_h
     sys_soundcard_h
+    sys_audioio_h
     sys_time_h
     sys_un_h
     sys_videoio_h
@@ -3375,6 +3376,8 @@ opengl_outdev_deps="opengl"
 opengl_outdev_suggest="sdl2"
 oss_indev_deps_any="sys_soundcard_h"
 oss_outdev_deps_any="sys_soundcard_h"
+sunau_indev_deps_any="sys_audioio_h"
+sunau_outdev_deps_any="sys_audioio_h"
 pulse_indev_deps="libpulse"
 pulse_outdev_deps="libpulse"
 sdl2_outdev_deps="sdl2"
@@ -6082,6 +6085,7 @@ check_headers libcrystalhd/libcrystalhd_if.h
 check_headers malloc.h
 check_headers net/udplite.h
 check_headers poll.h
+check_headers sys/audioio.h
 check_headers sys/param.h
 check_headers sys/resource.h
 check_headers sys/select.h
diff --git a/doc/general.texi b/doc/general.texi
index 3684847ac1..2231a1442f 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -1382,6 +1382,7 @@ performance on systems without hardware floating point support).
 @item OSS               @tab X      @tab X
 @item PulseAudio        @tab X      @tab X
 @item SDL               @tab        @tab X
+@item Sun Audio         @tab        @tab X
 @item Video4Linux2      @tab X      @tab X
 @item VfW capture       @tab X      @tab
 @item X11 grabbing      @tab X      @tab
diff --git a/doc/indevs.texi b/doc/indevs.texi
index 6f5afaf344..c55dcb6329 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -1285,6 +1285,35 @@ Set the number of channels. Default is 2.
 
 @end table
 
+@section sunau
+
+Solaris/NetBSD audio input device.
+
+The filename to provide to the input device is the device node
+representing the Sun input device, and is usually set to
+@file{/dev/audio0}.
+
+For example to grab from @file{/dev/audio0} using @command{ffmpeg} use the
+command:
+@example
+ffmpeg -f sunau -i /dev/audio0 /tmp/oss.wav
+@end example
+
+@subsection Options
+
+@table @option
+
+@item buffer_samples
+Set the size of the audio buffer in samples. Default is 32.
+
+@item sample_rate
+Set the sample rate in Hz. Default is 48000.
+
+@item channels
+Set the number of channels. Default is 2.
+
+@end table
+
 @section video4linux2, v4l2
 
 Video4Linux2 input video device.
diff --git a/doc/outdevs.texi b/doc/outdevs.texi
index 60606eb6e7..5a327adbb0 100644
--- a/doc/outdevs.texi
+++ b/doc/outdevs.texi
@@ -395,6 +395,17 @@ ffmpeg -i INPUT -c:v rawvideo -pix_fmt yuv420p -window_size qcif -f sdl "SDL out
 
 sndio audio output device.
 
+@section sunau
+
+Solaris/NetBSD audio output device.
+
+@subsection Options
+@table @option
+
+@item buffer_samples
+Set the size of the audio buffer in samples. Default is 32.
+@end table
+
 @section v4l2
 
 Video4Linux2 output device.
diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index 6ea62b914e..51d703d824 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -43,6 +43,8 @@ OBJS-$(CONFIG_PULSE_OUTDEV)              += pulse_audio_enc.o \
 OBJS-$(CONFIG_SDL2_OUTDEV)               += sdl2.o
 OBJS-$(CONFIG_SNDIO_INDEV)               += sndio_dec.o sndio.o
 OBJS-$(CONFIG_SNDIO_OUTDEV)              += sndio_enc.o sndio.o
+OBJS-$(CONFIG_SUNAU_INDEV)               += sunau_dec.o sunau.o
+OBJS-$(CONFIG_SUNAU_OUTDEV)              += sunau_enc.o sunau.o
 OBJS-$(CONFIG_V4L2_INDEV)                += v4l2.o v4l2-common.o timefilter.o
 OBJS-$(CONFIG_V4L2_OUTDEV)               += v4l2enc.o v4l2-common.o
 OBJS-$(CONFIG_VFWCAP_INDEV)              += vfwcap.o
diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index 8633433254..c2fce8a4f3 100644
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -49,6 +49,8 @@ extern AVOutputFormat ff_pulse_muxer;
 extern AVOutputFormat ff_sdl2_muxer;
 extern AVInputFormat  ff_sndio_demuxer;
 extern AVOutputFormat ff_sndio_muxer;
+extern AVInputFormat  ff_sunau_demuxer;
+extern AVOutputFormat ff_sunau_muxer;
 extern AVInputFormat  ff_v4l2_demuxer;
 extern AVOutputFormat ff_v4l2_muxer;
 extern AVInputFormat  ff_vfwcap_demuxer;
diff --git a/libavdevice/sunau.c b/libavdevice/sunau.c
new file mode 100644
index 0000000000..a707388617
--- /dev/null
+++ b/libavdevice/sunau.c
@@ -0,0 +1,102 @@
+/*
+ * Solaris/NetBSD play and grab interface
+ * Copyright (c) 2020 Yorick Hardy
+ * Copyright (c) 2020 Nia Alarie <nia@NetBSD.org>
+ *
+ * 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 "config.h"
+
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/audioio.h>
+#include <sys/ioctl.h>
+
+#include "libavutil/log.h"
+
+#include "libavcodec/avcodec.h"
+#include "avdevice.h"
+
+#include "sunau.h"
+
+int ff_sunau_audio_open(AVFormatContext *s1, int is_output,
+                          const char *audio_device)
+{
+    SunAudioData *s = s1->priv_data;
+    struct audio_info info;
+    struct audio_prinfo *prinfo;
+    int audio_fd, err;
+
+    audio_fd = avpriv_open(audio_device, is_output ? O_WRONLY : O_RDONLY);
+    if (audio_fd < 0) {
+        av_log(s1, AV_LOG_ERROR, "%s: %s\n", audio_device, av_err2str(AVERROR(errno)));
+        return AVERROR(EIO);
+    }
+
+    AUDIO_INITINFO(&info);
+
+#ifdef AUMODE_PLAY /* BSD extension */
+    info.mode = is_output ? AUMODE_PLAY : AUMODE_RECORD;
+#endif
+
+    prinfo = is_output ? &info.play : &info.record;
+
+    prinfo->encoding = AUDIO_ENCODING_LINEAR;
+    prinfo->precision = 16;
+    prinfo->sample_rate = s->sample_rate;
+    prinfo->channels = s->channels;
+
+    if ((err = ioctl(audio_fd, AUDIO_SETINFO, &info)) < 0) {
+        av_log(s1, AV_LOG_ERROR, "AUDIO_SETINFO: %s\n", av_err2str(AVERROR(errno)));
+        goto fail;
+    }
+
+    if ((err = ioctl(audio_fd, AUDIO_GETINFO, &info)) < 0) {
+        av_log(s1, AV_LOG_ERROR, "AUDIO_GETINFO: %s\n", av_err2str(AVERROR(errno)));
+        goto fail;
+    }
+
+    s->fd = audio_fd;
+#ifdef HAVE_BIGENDIAN
+    s->codec_id = AV_CODEC_ID_PCM_S16BE;
+#else
+    s->codec_id = AV_CODEC_ID_PCM_S16LE;
+#endif
+    s->precision = prinfo->precision;
+    s->sample_rate = prinfo->sample_rate;
+    s->channels = prinfo->channels;
+    s->blocksize = s->buffer_samples * prinfo->precision * prinfo->channels;
+
+    if ((s->buffer = malloc(s->blocksize)) == NULL) {
+        av_log(s1, AV_LOG_ERROR, "malloc: %s\n", av_err2str(AVERROR(errno)));
+        goto fail;
+    }
+
+    return 0;
+ fail:
+    close(audio_fd);
+    return AVERROR(EIO);
+}
+
+int ff_sunau_audio_close(SunAudioData *s)
+{
+    close(s->fd);
+    return 0;
+}
diff --git a/libavdevice/sunau.h b/libavdevice/sunau.h
new file mode 100644
index 0000000000..27dd8bec68
--- /dev/null
+++ b/libavdevice/sunau.h
@@ -0,0 +1,48 @@
+/*
+ * Solaris/NetBSD play and grab interface
+ * Copyright (c) 2020 Yorick Hardy
+ * Copyright (c) 2020 Nia Alarie <nia@NetBSD.org>
+ *
+ * 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
+ */
+
+#ifndef AVDEVICE_SUNAU_H
+#define AVDEVICE_SUNAU_H
+
+#include "libavcodec/avcodec.h"
+
+#include "libavformat/avformat.h"
+
+typedef struct SunAudioData {
+    AVClass *class;
+    int fd;
+    int buffer_samples;
+    unsigned int sample_rate;
+    unsigned int channels;
+    unsigned int precision;
+    size_t blocksize;
+    enum AVCodecID codec_id;
+    uint8_t *buffer;
+    size_t buffer_ptr;
+} SunAudioData;
+
+int ff_sunau_audio_open(AVFormatContext *s1, int is_output,
+                        const char *audio_device);
+
+int ff_sunau_audio_close(SunAudioData *s);
+
+#endif /* AVDEVICE_SUNAU_H */
diff --git a/libavdevice/sunau_dec.c b/libavdevice/sunau_dec.c
new file mode 100644
index 0000000000..7157fbc6d6
--- /dev/null
+++ b/libavdevice/sunau_dec.c
@@ -0,0 +1,138 @@
+/*
+ * Solaris/NetBSD play and grab interface
+ * Copyright (c) 2020 Yorick Hardy
+ * Copyright (c) 2020 Nia Alarie <nia@NetBSD.org>
+ *
+ * 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 "config.h"
+
+#include <stdint.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <sys/audioio.h>
+#include <sys/ioctl.h>
+
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
+#include "libavutil/time.h"
+
+#include "libavcodec/avcodec.h"
+
+#include "avdevice.h"
+#include "libavformat/internal.h"
+
+#include "sunau.h"
+
+static int audio_read_header(AVFormatContext *s1)
+{
+    SunAudioData *s = s1->priv_data;
+    AVStream *st;
+
+    st = avformat_new_stream(s1, NULL);
+    if (!st) {
+        return AVERROR(ENOMEM);
+    }
+
+    if (ff_sunau_audio_open(s1, 0, s1->url) < 0) {
+        return AVERROR(EIO);
+    }
+
+    /* take real parameters */
+    st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+    st->codecpar->codec_id = s->codec_id;
+    st->codecpar->sample_rate = s->sample_rate;
+    st->codecpar->channels = s->channels;
+
+    avpriv_set_pts_info(st, 64, 1, 1000000);  /* 64 bits pts in us */
+
+    return 0;
+}
+
+static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    SunAudioData *s = s1->priv_data;
+    struct audio_info info;
+    int ret;
+    long bdelay;
+    int64_t cur_time;
+
+    if ((ret = av_new_packet(pkt, s->blocksize)) < 0)
+        return ret;
+
+    ret = read(s->fd, pkt->data, pkt->size);
+    if (ret <= 0) {
+        av_packet_unref(pkt);
+        pkt->size = 0;
+        return ret < 0 ? AVERROR(errno) : AVERROR_EOF;
+    }
+
+    /* compute pts of the start of the packet */
+    cur_time = av_gettime();
+    bdelay = ret;
+
+#ifdef AUDIO_GETBUFINFO /* BSD extension */
+    if (ioctl(s->fd, AUDIO_GETBUFINFO, &info) == 0) {
+        bdelay += info.record.seek;
+    }
+#endif
+
+    /* subtract time represented by the number of bytes in the audio fifo */
+    cur_time -= (bdelay * 1000000LL) / (s->sample_rate * s->channels * s->precision);
+
+    /* convert to wanted units */
+    pkt->pts = cur_time;
+
+    return 0;
+}
+
+static int audio_read_close(AVFormatContext *s1)
+{
+    SunAudioData *s = s1->priv_data;
+
+    ff_sunau_audio_close(s);
+    return 0;
+}
+
+static const AVOption options[] = {
+    { "buffer_samples", "", offsetof(SunAudioData, buffer_samples), AV_OPT_TYPE_INT, {.i64 = 32},    1,     INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
+    { "sample_rate",    "", offsetof(SunAudioData, sample_rate),    AV_OPT_TYPE_INT, {.i64 = 48000}, 1000,  192000,  AV_OPT_FLAG_DECODING_PARAM },
+    { "channels",       "", offsetof(SunAudioData, channels),       AV_OPT_TYPE_INT, {.i64 = 2},     1,     12,      AV_OPT_FLAG_DECODING_PARAM },
+    { NULL },
+};
+
+static const AVClass sunau_demuxer_class = {
+    .class_name     = "Sun/NetBSD audio demuxer",
+    .item_name      = av_default_item_name,
+    .option         = options,
+    .version        = LIBAVUTIL_VERSION_INT,
+    .category       = AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
+};
+
+AVInputFormat ff_sunau_demuxer = {
+    .name           = "sunau",
+    .long_name      = NULL_IF_CONFIG_SMALL("Sun/NetBSD audio capture"),
+    .priv_data_size = sizeof(SunAudioData),
+    .read_header    = audio_read_header,
+    .read_packet    = audio_read_packet,
+    .read_close     = audio_read_close,
+    .flags          = AVFMT_NOFILE,
+    .priv_class     = &sunau_demuxer_class,
+};
diff --git a/libavdevice/sunau_enc.c b/libavdevice/sunau_enc.c
new file mode 100644
index 0000000000..f71705d9ca
--- /dev/null
+++ b/libavdevice/sunau_enc.c
@@ -0,0 +1,114 @@
+/*
+ * Solaris/NetBSD play and grab interface
+ * Copyright (c) 2020 Yorick Hardy
+ * Copyright (c) 2020 Nia Alarie <nia@NetBSD.org>
+ *
+ * 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 "config.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/audioio.h>
+#include <sys/ioctl.h>
+
+#include "libavutil/internal.h"
+
+#include "libavcodec/avcodec.h"
+
+#include "avdevice.h"
+#include "libavformat/internal.h"
+
+#include "sunau.h"
+
+static int audio_write_header(AVFormatContext *s1)
+{
+    SunAudioData *s = s1->priv_data;
+    AVStream *st;
+
+    st = s1->streams[0];
+    s->sample_rate = st->codecpar->sample_rate;
+    s->channels = st->codecpar->channels;
+    s->codec_id = st->codecpar->codec_id;
+    return ff_sunau_audio_open(s1, 1, s1->url) < 0 ? AVERROR(EIO) : 0;
+}
+
+static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    SunAudioData *s = s1->priv_data;
+    unsigned int len, size = pkt->size;
+    uint8_t *buf = pkt->data;
+    int ret;
+
+    while (size > 0) {
+        len = FFMIN(s->blocksize - s->buffer_ptr, size);
+        memcpy(s->buffer + s->buffer_ptr, buf, len);
+        s->buffer_ptr += len;
+        if (s->buffer_ptr >= s->blocksize) {
+            for (;;) {
+                ret = write(s->fd, s->buffer, s->blocksize);
+                if (ret > 0)
+                    break;
+                if (ret < 0 && (errno != EAGAIN && errno != EINTR))
+                    return AVERROR(EIO);
+            }
+            s->buffer_ptr = 0;
+        }
+        buf += len;
+        size -= len;
+    }
+    return 0;
+}
+
+static int audio_write_trailer(AVFormatContext *s1)
+{
+    SunAudioData *s = s1->priv_data;
+
+    ff_sunau_audio_close(s);
+    return 0;
+}
+
+static const AVOption options[] = {
+    { "buffer_samples", "", offsetof(SunAudioData, buffer_samples), AV_OPT_TYPE_INT, {.i64 = 32}, 1, 192000, AV_OPT_FLAG_DECODING_PARAM },
+    { NULL },
+};
+
+static const AVClass sunau_muxer_class = {
+    .class_name     = "Sun/NetBSD audio muxer",
+    .item_name      = av_default_item_name,
+    .option         = options,
+    .version        = LIBAVUTIL_VERSION_INT,
+    .category       = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
+};
+
+AVOutputFormat ff_sunau_muxer = {
+    .name           = "sunau",
+    .long_name      = NULL_IF_CONFIG_SMALL("Sun/NetBSD audio playback"),
+    .priv_data_size = sizeof(SunAudioData),
+    /* XXX: we may need to support higher precisions in the future, but
+       right now this is what the kernel can handle natively */
+    /* XXX: find better solution with "preinit" method, needed also in
+       other formats */
+    .audio_codec    = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
+    .video_codec    = AV_CODEC_ID_NONE,
+    .write_header   = audio_write_header,
+    .write_packet   = audio_write_packet,
+    .write_trailer  = audio_write_trailer,
+    .flags          = AVFMT_NOFILE,
+    .priv_class     = &sunau_muxer_class,
+};
