avcodec: libdav1d AV1 decoder wrapper.

Originally written by Ronald S. Bultje, with fixes, optimizations and
improvements by James Almer.

Signed-off-by: James Almer <jamrial@gmail.com>

Changelog

@@ -3,6 +3,8 @@ releases are sorted from youngest to oldest.
 
 version <next>:
 - tpad filter
+- AV1 decoding support through libdav1d
+
 
 version 4.1:
 - deblock filter

configure

@@ -226,6 +226,7 @@ External library support:
   --enable-libcelt         enable CELT decoding via libcelt [no]
   --enable-libcdio         enable audio CD grabbing with libcdio [no]
   --enable-libcodec2       enable codec2 en/decoding using libcodec2 [no]
+  --enable-libdav1d        enable AV1 decoding via libdav1d [no]
   --enable-libdavs2        enable AVS2 decoding via libdavs2 [no]
   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
                            and libraw1394 [no]
@@ -1712,6 +1713,7 @@ EXTERNAL_LIBRARY_LIST="
     libcaca
     libcelt
     libcodec2
+    libdav1d
     libdc1394
     libdrm
     libflite
@@ -3090,6 +3092,7 @@ libaom_av1_encoder_select="extract_extradata_bsf"
 libcelt_decoder_deps="libcelt"
 libcodec2_decoder_deps="libcodec2"
 libcodec2_encoder_deps="libcodec2"
+libdav1d_decoder_deps="libdav1d"
 libdavs2_decoder_deps="libdavs2"
 libfdk_aac_decoder_deps="libfdk_aac"
 libfdk_aac_encoder_deps="libfdk_aac"
@@ -6068,6 +6071,7 @@ enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
 enabled libcaca           && require_pkg_config libcaca caca caca.h caca_create_canvas
 enabled libcodec2         && require libcodec2 codec2/codec2.h codec2_create -lcodec2
+enabled libdav1d          && require_pkg_config libdav1d "dav1d >= 0.0.1" "dav1d/dav1d.h" dav1d_version
 enabled libdavs2          && require_pkg_config libdavs2 "davs2 >= 1.5.115" davs2.h davs2_decoder_open
 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
 enabled libdrm            && require_pkg_config libdrm libdrm xf86drm.h drmGetVersion

doc/general.texi

@@ -758,8 +758,8 @@ following image formats are supported:
 @item Autodesk Animator Flic video  @tab     @tab  X
 @item Autodesk RLE           @tab     @tab  X
     @tab fourcc: AASC
-@item AV1                    @tab     @tab  E
-    @tab Supported through external library libaom
+@item AV1                    @tab  E  @tab  E
+    @tab Supported through external libraries libaom and libdav1d
 @item Avid 1:1 10-bit RGB Packer  @tab  X  @tab  X
     @tab fourcc: AVrp
 @item AVS (Audio Video Standard) video  @tab     @tab  X

libavcodec/Makefile

@@ -956,6 +956,7 @@ OBJS-$(CONFIG_LIBAOM_AV1_ENCODER)         += libaomenc.o
 OBJS-$(CONFIG_LIBCELT_DECODER)            += libcelt_dec.o
 OBJS-$(CONFIG_LIBCODEC2_DECODER)          += libcodec2.o codec2utils.o
 OBJS-$(CONFIG_LIBCODEC2_ENCODER)          += libcodec2.o codec2utils.o
+OBJS-$(CONFIG_LIBDAV1D_DECODER)           += libdav1d.o
 OBJS-$(CONFIG_LIBDAVS2_DECODER)           += libdavs2.o
 OBJS-$(CONFIG_LIBFDK_AAC_DECODER)         += libfdk-aacdec.o
 OBJS-$(CONFIG_LIBFDK_AAC_ENCODER)         += libfdk-aacenc.o

libavcodec/allcodecs.c

@@ -676,6 +676,7 @@ extern AVCodec ff_libaom_av1_encoder;
 extern AVCodec ff_libcelt_decoder;
 extern AVCodec ff_libcodec2_encoder;
 extern AVCodec ff_libcodec2_decoder;
+extern AVCodec ff_libdav1d_decoder;
 extern AVCodec ff_libdavs2_decoder;
 extern AVCodec ff_libfdk_aac_encoder;
 extern AVCodec ff_libfdk_aac_decoder;

libavcodec/libdav1d.c

@@ -0,0 +1,270 @@
+/*
+ * Copyright (c) 2018 Ronald S. Bultje <rsbultje gmail com>
+ * Copyright (c) 2018 James Almer <jamrial gmail com>
+ *
+ * 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 <dav1d/dav1d.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/fifo.h"
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "decode.h"
+#include "internal.h"
+
+typedef struct Libdav1dContext {
+    AVClass *class;
+    Dav1dContext *c;
+
+    AVFifoBuffer *cache;
+    Dav1dData data;
+    int tile_threads;
+} Libdav1dContext;
+
+static av_cold int libdav1d_init(AVCodecContext *c)
+{
+    Libdav1dContext *dav1d = c->priv_data;
+    Dav1dSettings s;
+    int res;
+
+    av_log(c, AV_LOG_INFO, "libdav1d %s\n", dav1d_version());
+
+    dav1d_default_settings(&s);
+    s.n_tile_threads = dav1d->tile_threads;
+    s.n_frame_threads = FFMIN(c->thread_count ? c->thread_count : av_cpu_count(), 256);
+
+    dav1d->cache = av_fifo_alloc(8 * sizeof(AVPacket));
+    if (!dav1d->cache)
+        return AVERROR(ENOMEM);
+
+    res = dav1d_open(&dav1d->c, &s);
+    if (res < 0)
+        return AVERROR(ENOMEM);
+
+    return 0;
+}
+
+static void libdav1d_flush(AVCodecContext *c)
+{
+    Libdav1dContext *dav1d = c->priv_data;
+
+    av_fifo_reset(dav1d->cache);
+    dav1d_data_unref(&dav1d->data);
+    dav1d_flush(dav1d->c);
+}
+
+static int libdav1d_fifo_write(void *src, void *dst, int dst_size) {
+    AVPacket *pkt_dst = dst, *pkt_src = src;
+
+    av_assert2(dst_size >= sizeof(AVPacket));
+
+    pkt_src->buf = NULL;
+    av_packet_free_side_data(pkt_src);
+    *pkt_dst = *pkt_src;
+
+    return sizeof(AVPacket);
+}
+
+static void libdav1d_data_free(const uint8_t *data, void *opaque) {
+    AVBufferRef *buf = opaque;
+
+    av_buffer_unref(&buf);
+}
+
+static void libdav1d_frame_free(void *opaque, uint8_t *data) {
+    Dav1dPicture p = { 0 };
+
+    p.ref = opaque;
+    p.data[0] = (void *) 0x1; // this has to be non-NULL
+    dav1d_picture_unref(&p);
+}
+
+static const enum AVPixelFormat pix_fmt[][2] = {
+    [DAV1D_PIXEL_LAYOUT_I400] = { AV_PIX_FMT_GRAY8,   AV_PIX_FMT_GRAY10 },
+    [DAV1D_PIXEL_LAYOUT_I420] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10 },
+    [DAV1D_PIXEL_LAYOUT_I422] = { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10 },
+    [DAV1D_PIXEL_LAYOUT_I444] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10 },
+};
+
+// TODO: Update once 12bit support is added.
+static const int profile[] = {
+    [DAV1D_PIXEL_LAYOUT_I400] = FF_PROFILE_AV1_MAIN,
+    [DAV1D_PIXEL_LAYOUT_I420] = FF_PROFILE_AV1_MAIN,
+    [DAV1D_PIXEL_LAYOUT_I422] = FF_PROFILE_AV1_PROFESSIONAL,
+    [DAV1D_PIXEL_LAYOUT_I444] = FF_PROFILE_AV1_HIGH,
+};
+
+static int libdav1d_receive_frame(AVCodecContext *c, AVFrame *frame)
+{
+    Libdav1dContext *dav1d = c->priv_data;
+    Dav1dData *data = &dav1d->data;
+    AVPacket pkt = { 0 };
+    Dav1dPicture p = { 0 };
+    int res;
+
+    if (!data->sz) {
+        res = ff_decode_get_packet(c, &pkt);
+        if (res < 0 && res != AVERROR_EOF)
+            return res;
+
+        if (pkt.size) {
+            if (!av_fifo_space(dav1d->cache)) {
+                res = av_fifo_grow(dav1d->cache, 8 * sizeof(pkt));
+                if (res < 0) {
+                    av_packet_unref(&pkt);
+                    return res;
+                }
+            }
+
+            res = dav1d_data_wrap(data, pkt.data, pkt.size, libdav1d_data_free, pkt.buf);
+            if (res < 0) {
+                av_packet_unref(&pkt);
+                return res;
+            }
+
+            av_fifo_generic_write(dav1d->cache, &pkt, sizeof(pkt), libdav1d_fifo_write);
+        } else {
+            data = NULL;
+        }
+    }
+
+    res = dav1d_decode(dav1d->c, data, &p);
+    if (res < 0) {
+        if (res == -EINVAL)
+            res = AVERROR_INVALIDDATA;
+        else if (res == -EAGAIN && c->internal->draining)
+            res = AVERROR_EOF;
+
+        return res;
+    }
+
+    av_assert0(p.data[0] != NULL);
+
+    av_fifo_generic_read(dav1d->cache, &pkt, sizeof(pkt), NULL);
+
+    frame->buf[0] = av_buffer_create(NULL, 0, libdav1d_frame_free,
+                                     p.ref, AV_BUFFER_FLAG_READONLY);
+    if (!frame->buf[0]) {
+        dav1d_picture_unref(&p);
+        return AVERROR(ENOMEM);
+    }
+
+    frame->data[0] = p.data[0];
+    frame->data[1] = p.data[1];
+    frame->data[2] = p.data[2];
+    frame->linesize[0] = p.stride[0];
+    frame->linesize[1] = p.stride[1];
+    frame->linesize[2] = p.stride[1];
+
+    c->profile = profile[p.p.layout];
+    frame->format = c->pix_fmt = pix_fmt[p.p.layout][p.p.bpc == 10];
+    frame->width = p.p.w;
+    frame->height = p.p.h;
+    if (c->width != p.p.w || c->height != p.p.h) {
+        res = ff_set_dimensions(c, p.p.w, p.p.h);
+        if (res < 0)
+            return res;
+    }
+
+    switch (p.p.chr) {
+    case DAV1D_CHR_VERTICAL:
+        frame->chroma_location = c->chroma_sample_location = AVCHROMA_LOC_LEFT;
+        break;
+    case DAV1D_CHR_COLOCATED:
+        frame->chroma_location = c->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
+        break;
+    }
+    frame->colorspace = c->colorspace = (enum AVColorSpace) p.p.mtrx;
+    frame->color_primaries = c->color_primaries = (enum AVColorPrimaries) p.p.pri;
+    frame->color_trc = c->color_trc = (enum AVColorTransferCharacteristic) p.p.trc;
+    frame->color_range = c->color_range = p.p.fullrange ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
+
+    // match timestamps and packet size
+    frame->pts = frame->best_effort_timestamp = pkt.pts;
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
+    frame->pkt_pts = pkt.pts;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+    frame->pkt_dts = pkt.dts;
+    frame->pkt_pos = pkt.pos;
+    frame->pkt_size = pkt.size;
+    frame->pkt_duration = pkt.duration;
+    frame->key_frame = p.p.type == DAV1D_FRAME_TYPE_KEY;
+
+    switch (p.p.type) {
+    case DAV1D_FRAME_TYPE_KEY:
+    case DAV1D_FRAME_TYPE_INTRA:
+        frame->pict_type = AV_PICTURE_TYPE_I;
+        break;
+    case DAV1D_FRAME_TYPE_INTER:
+        frame->pict_type = AV_PICTURE_TYPE_P;
+        break;
+    case DAV1D_FRAME_TYPE_SWITCH:
+        frame->pict_type = AV_PICTURE_TYPE_SP;
+        break;
+    default:
+        return AVERROR_INVALIDDATA;
+    }
+
+    return 0;
+}
+
+static av_cold int libdav1d_close(AVCodecContext *c)
+{
+    Libdav1dContext *dav1d = c->priv_data;
+
+    av_fifo_freep(&dav1d->cache);
+    dav1d_data_unref(&dav1d->data);
+    dav1d_close(&dav1d->c);
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(Libdav1dContext, x)
+#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+static const AVOption libdav1d_options[] = {
+    { "tilethreads",  "Tile threads",  OFFSET(tile_threads),  AV_OPT_TYPE_INT, { .i64 = 1 }, 1,  64, VD, NULL },
+    { NULL }
+};
+
+static const AVClass libdav1d_class = {
+    .class_name = "libdav1d decoder",
+    .item_name  = av_default_item_name,
+    .option     = libdav1d_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_libdav1d_decoder = {
+    .name           = "libdav1d",
+    .long_name      = NULL_IF_CONFIG_SMALL("dav1d AV1 decoder by VideoLAN"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_AV1,
+    .priv_data_size = sizeof(Libdav1dContext),
+    .init           = libdav1d_init,
+    .close          = libdav1d_close,
+    .flush          = libdav1d_flush,
+    .receive_frame  = libdav1d_receive_frame,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
+                      FF_CODEC_CAP_SETS_PKT_DTS,
+    .priv_class     = &libdav1d_class,
+    .wrapper_name   = "libdav1d",
+};

libavcodec/version.h

@@ -28,8 +28,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  38
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR  39
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \