From 726a9def395d40aa0d8a4b8fe5ebc1af13015dbb Mon Sep 17 00:00:00 2001
From: Daryl Seah <daryl.seah@intel.com>
Date: Fri, 18 Jan 2019 02:11:38 +0000
Subject: [PATCH] Add ability for ffmpeg to run svt-av1

Change-Id: I37ee5414fdd99e0b3f112a6e5ede166f3e48d819
Signed-off-by: Daryl Seah <daryl.seah@intel.com>
Signed-off-by: Jing SUN <jing.a.sun@intel.com>
Signed-off-by: ZhiZhen Tang <zhizhen.tang@intel.com>
Signed-off-by: Zhong Li <zhong.li@intel.com>
Signed-off-by: Xu Guangxin <guangxin.xu@intel.com>
---
 configure               |   4 +
 libavcodec/Makefile     |   1 +
 libavcodec/allcodecs.c  |   1 +
 libavcodec/libsvt_av1.c | 583 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 589 insertions(+)
 create mode 100644 libavcodec/libsvt_av1.c

diff --git a/configure b/configure
index 7495f35faa..e0a466b968 100755
--- a/configure
+++ b/configure
@@ -249,6 +249,7 @@ External library support:
   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
+  --enable-libsvtav1       enable AV1 encoding via svt [no]
   --enable-libopencv       enable video filtering via libopencv [no]
   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
@@ -1786,6 +1787,7 @@ EXTERNAL_LIBRARY_LIST="
     libmodplug
     libmp3lame
     libmysofa
+    libsvtav1
     libopencv
     libopenh264
     libopenjpeg
@@ -3223,6 +3225,7 @@ libopencore_amrnb_decoder_deps="libopencore_amrnb"
 libopencore_amrnb_encoder_deps="libopencore_amrnb"
 libopencore_amrnb_encoder_select="audio_frame_queue"
 libopencore_amrwb_decoder_deps="libopencore_amrwb"
+libsvt_av1_encoder_deps="libsvtav1"
 libopenh264_decoder_deps="libopenh264"
 libopenh264_decoder_select="h264_mp4toannexb_bsf"
 libopenh264_encoder_deps="libopenh264"
@@ -6342,6 +6345,7 @@ enabled libnpp            && { check_lib libnpp npp.h nppGetLibVersion -lnppig -
                                die "ERROR: libnpp not found"; }
 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
+enabled libsvtav1         && require_pkg_config libsvtav1 SvtAv1Enc EbSvtAv1Enc.h svt_av1_enc_init_handle
 enabled libopencv         && { check_headers opencv2/core/core_c.h &&
                                { check_pkg_config libopencv opencv opencv2/core/core_c.h cvCreateImageHeader ||
                                  require libopencv opencv2/core/core_c.h cvCreateImageHeader -lopencv_core -lopencv_imgproc; } ||
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 5a6ea59715..b4dbca54d5 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -971,6 +971,7 @@ OBJS-$(CONFIG_WEBM_MUXER)              += mpeg4audio.o
 OBJS-$(CONFIG_ELBG_FILTER)             += elbg.o
 
 # external codec libraries
+OBJS-$(CONFIG_LIBSVT_AV1_ENCODER)         += libsvt_av1.o
 OBJS-$(CONFIG_AAC_AT_DECODER)             += audiotoolboxdec.o
 OBJS-$(CONFIG_AC3_AT_DECODER)             += audiotoolboxdec.o
 OBJS-$(CONFIG_ADPCM_IMA_QT_AT_DECODER)    += audiotoolboxdec.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index fa0c08d42e..ec1e0d48ba 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -716,6 +716,7 @@ extern AVCodec ff_libmp3lame_encoder;
 extern AVCodec ff_libopencore_amrnb_encoder;
 extern AVCodec ff_libopencore_amrnb_decoder;
 extern AVCodec ff_libopencore_amrwb_decoder;
+extern AVCodec ff_libsvt_av1_encoder;
 extern AVCodec ff_libopenjpeg_encoder;
 extern AVCodec ff_libopenjpeg_decoder;
 extern AVCodec ff_libopus_encoder;
diff --git a/libavcodec/libsvt_av1.c b/libavcodec/libsvt_av1.c
new file mode 100644
index 0000000000..541ba228fa
--- /dev/null
+++ b/libavcodec/libsvt_av1.c
@@ -0,0 +1,583 @@
+
+/*
+* Scalable Video Technology for AV1 encoder library plugin
+*
+* Copyright (c) 2018 Intel Corporation
+*
+* 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 this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include <stdint.h>
+#include "EbSvtAv1ErrorCodes.h"
+#include "EbSvtAv1Enc.h"
+
+#include "libavutil/common.h"
+#include "libavutil/frame.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/avassert.h"
+
+#include "internal.h"
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58, 93, 100)
+#include "encode.h"
+#endif
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58, 90, 100)
+#include "packet_internal.h"
+#endif
+#include "avcodec.h"
+
+typedef enum eos_status {
+    EOS_NOT_REACHED = 0,
+    EOS_SENT,
+    EOS_RECEIVED
+}EOS_STATUS;
+
+typedef struct SvtContext {
+    AVClass     *class;
+
+    EbSvtAv1EncConfiguration    enc_params;
+    EbComponentType            *svt_handle;
+
+    EbBufferHeaderType         *in_buf;
+    int                         raw_size;
+    int                         max_tu_size;
+
+    AVFrame *frame;
+
+    AVBufferPool* pool;
+
+    EOS_STATUS eos_flag;
+
+    // User options.
+    int hierarchical_level;
+    int la_depth;
+    int enc_mode;
+    int rc_mode;
+    int scd;
+    int qp;
+
+    int forced_idr;
+
+    int tier;
+    int level;
+    int profile;
+
+    int tile_columns;
+    int tile_rows;
+} SvtContext;
+
+static const struct {
+    EbErrorType    eb_err;
+    int            av_err;
+    const char     *desc;
+} svt_errors[] = {
+    { EB_ErrorNone,                             0,              "success"                   },
+    { EB_ErrorInsufficientResources,      AVERROR(ENOMEM),      "insufficient resources"    },
+    { EB_ErrorUndefined,                  AVERROR(EINVAL),      "undefined error"           },
+    { EB_ErrorInvalidComponent,           AVERROR(EINVAL),      "invalid component"         },
+    { EB_ErrorBadParameter,               AVERROR(EINVAL),      "bad parameter"             },
+    { EB_ErrorDestroyThreadFailed,        AVERROR_EXTERNAL,     "failed to destory thread"  },
+    { EB_ErrorSemaphoreUnresponsive,      AVERROR_EXTERNAL,     "semaphore unresponsive"    },
+    { EB_ErrorDestroySemaphoreFailed,     AVERROR_EXTERNAL,     "semaphore unresponsive"    },
+    { EB_ErrorCreateMutexFailed,          AVERROR_EXTERNAL,     "failed to creat mutex"     },
+    { EB_ErrorMutexUnresponsive,          AVERROR_EXTERNAL,     "mutex unresponsive"        },
+    { EB_ErrorDestroyMutexFailed,         AVERROR_EXTERNAL,     "failed to destory muxtex"  },
+    { EB_NoErrorEmptyQueue,               AVERROR(EAGAIN),      "empty queue"               },
+};
+
+static int svt_map_error(EbErrorType eb_err, const char **desc)
+{
+    int i;
+
+    av_assert0(desc);
+    for (i = 0; i < FF_ARRAY_ELEMS(svt_errors); i++) {
+        if (svt_errors[i].eb_err == eb_err) {
+            *desc = svt_errors[i].desc;
+            return svt_errors[i].av_err;
+        }
+    }
+    *desc = "unknown error";
+    return AVERROR_UNKNOWN;
+}
+
+static int svt_print_error(void *log_ctx, EbErrorType err,
+                           const char *error_string)
+{
+    const char *desc;
+    int ret;
+    ret = svt_map_error(err, &desc);
+    av_log(log_ctx, AV_LOG_ERROR, "%s: %s (0x%x)\n", error_string, desc, err);
+    return ret;
+}
+
+static void free_buffer(SvtContext *svt_enc)
+{
+    if (svt_enc->in_buf) {
+        EbSvtIOFormat *in_data = (EbSvtIOFormat *)svt_enc->in_buf->p_buffer;
+        av_freep(&in_data);
+        av_freep(&svt_enc->in_buf);
+    }
+    av_buffer_pool_uninit(&svt_enc->pool);
+}
+
+static int alloc_buffer(EbSvtAv1EncConfiguration *config, SvtContext *svt_enc)
+{
+    const int    pack_mode_10bit   =
+        (config->encoder_bit_depth > 8) && (config->compressed_ten_bit_format == 0) ? 1 : 0;
+    const size_t luma_size_8bit    =
+        config->source_width * config->source_height * (1 << pack_mode_10bit);
+    const size_t luma_size_10bit   =
+        (config->encoder_bit_depth > 8 && pack_mode_10bit == 0) ? luma_size_8bit : 0;
+
+    EbSvtIOFormat *in_data;
+
+    svt_enc->raw_size = (luma_size_8bit + luma_size_10bit) * 3 / 2;
+
+    // allocate buffer for in and out
+    svt_enc->in_buf           = av_mallocz(sizeof(*svt_enc->in_buf));
+    if (!svt_enc->in_buf)
+        return AVERROR(ENOMEM);
+
+    svt_enc->in_buf->p_buffer  = (unsigned char *)av_mallocz(sizeof(*in_data));
+    if (!svt_enc->in_buf->p_buffer)
+        return AVERROR(ENOMEM);
+
+    svt_enc->in_buf->size        = sizeof(*svt_enc->in_buf);
+    svt_enc->in_buf->p_app_private  = NULL;
+
+    return 0;
+
+}
+
+static int config_enc_params(EbSvtAv1EncConfiguration *param,
+                             AVCodecContext *avctx)
+{
+    SvtContext *svt_enc = avctx->priv_data;
+    const AVPixFmtDescriptor *desc;
+
+    param->source_width     = avctx->width;
+    param->source_height    = avctx->height;
+
+    desc = av_pix_fmt_desc_get(avctx->pix_fmt);
+    param->encoder_bit_depth = desc->comp[0].depth;
+    av_log(avctx, AV_LOG_DEBUG , "Encoder %d bits depth input\n", param->encoder_bit_depth);
+
+    if (desc->log2_chroma_w == 1 && desc->log2_chroma_h == 1)
+        param->encoder_color_format   = EB_YUV420;
+    else if (desc->log2_chroma_w == 1 && desc->log2_chroma_h == 0)
+        param->encoder_color_format   = EB_YUV422;
+    else if (!desc->log2_chroma_w && !desc->log2_chroma_h)
+        param->encoder_color_format   = EB_YUV444;
+    else {
+        av_log(avctx, AV_LOG_ERROR , "Unsupported pixel format\n");
+        return AVERROR(EINVAL);
+    }
+    av_log(avctx, AV_LOG_DEBUG , "Encoder color format is %d \n", param->encoder_color_format);
+
+    param->profile = svt_enc->profile;
+
+    if ((param->encoder_color_format == EB_YUV422 || param->encoder_bit_depth > 10)
+         && param->profile != PROFESSIONAL_PROFILE ) {
+        av_log(avctx, AV_LOG_WARNING, "Force to be professional profile \n");
+        param->profile = PROFESSIONAL_PROFILE;
+    } else if (param->encoder_color_format == EB_YUV444 && param->profile != HIGH_PROFILE) {
+        av_log(avctx, AV_LOG_WARNING, "Force to be high profile \n");
+        param->profile = HIGH_PROFILE;
+    }
+
+    // Update param from options
+    param->hierarchical_levels     = svt_enc->hierarchical_level;
+    param->enc_mode                = svt_enc->enc_mode;
+    param->tier                   = svt_enc->tier;
+    param->level                  = svt_enc->level;
+    param->rate_control_mode        = svt_enc->rc_mode;
+    param->scene_change_detection   = svt_enc->scd;
+
+    param->qp                     = svt_enc->qp;
+
+
+    param->target_bit_rate          = avctx->bit_rate;
+    if (avctx->gop_size > 0)
+        param->intra_period_length  = avctx->gop_size - 1;
+
+    if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
+        param->frame_rate_numerator     = avctx->framerate.num;
+        param->frame_rate_denominator   = avctx->framerate.den * avctx->ticks_per_frame;
+    } else {
+        param->frame_rate_numerator     = avctx->time_base.den;
+        param->frame_rate_denominator   = avctx->time_base.num * avctx->ticks_per_frame;
+    }
+
+    if (param->rate_control_mode) {
+        param->max_qp_allowed       = avctx->qmax;
+        param->min_qp_allowed       = avctx->qmin;
+    }
+
+    param->intra_refresh_type       = svt_enc->forced_idr + 1;
+
+    if (svt_enc->la_depth != -1)
+        param->look_ahead_distance  = svt_enc->la_depth;
+
+    param->tile_columns = svt_enc->tile_columns;
+    param->tile_rows = svt_enc->tile_rows;
+
+    return 0;
+}
+
+static void read_in_data(const AVFrame *frame,
+                         EbBufferHeaderType *header_ptr)
+{
+    EbSvtIOFormat *in_data = (EbSvtIOFormat *)header_ptr->p_buffer;
+    const AVPixFmtDescriptor *desc;
+    int i, bytes_shift, plane_h;
+
+    desc = av_pix_fmt_desc_get(frame->format);
+    bytes_shift = desc->comp[0].depth > 8 ? 1 : 0;
+
+    in_data->luma = frame->data[0];
+    in_data->cb   = frame->data[1];
+    in_data->cr   = frame->data[2];
+
+    in_data->y_stride  = AV_CEIL_RSHIFT(frame->linesize[0], bytes_shift);
+    in_data->cb_stride = AV_CEIL_RSHIFT(frame->linesize[1], bytes_shift);
+    in_data->cr_stride = AV_CEIL_RSHIFT(frame->linesize[2], bytes_shift);
+
+    for (i = 0; i < desc->nb_components; i++) {
+        plane_h = frame->height;
+        if (i > 0)
+            plane_h = AV_CEIL_RSHIFT(plane_h, desc->log2_chroma_h);
+        header_ptr->n_filled_len += frame->linesize[i] * plane_h;
+    }
+}
+
+static av_cold int eb_enc_init(AVCodecContext *avctx)
+{
+    SvtContext   *svt_enc = avctx->priv_data;
+    EbErrorType svt_ret;
+    int ret;
+
+    svt_enc->eos_flag = EOS_NOT_REACHED;
+
+    svt_ret = svt_av1_enc_init_handle(&svt_enc->svt_handle, svt_enc, &svt_enc->enc_params);
+    if (svt_ret != EB_ErrorNone) {
+        return svt_print_error(avctx, svt_ret, "Error init encoder handle");
+    }
+
+    ret = config_enc_params(&svt_enc->enc_params, avctx);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error configure encoder parameters\n");
+        return ret;
+    }
+
+    svt_ret = svt_av1_enc_set_parameter(svt_enc->svt_handle, &svt_enc->enc_params);
+    if (svt_ret != EB_ErrorNone) {
+        return svt_print_error(avctx, svt_ret, "Error setting encoder parameters");
+    }
+
+    svt_ret = svt_av1_enc_init(svt_enc->svt_handle);
+    if (svt_ret != EB_ErrorNone) {
+        svt_av1_enc_deinit_handle(svt_enc->svt_handle);
+        svt_enc->svt_handle = NULL;
+        return svt_print_error(avctx, svt_ret, "Error init encoder");
+    }
+
+    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
+        EbBufferHeaderType *headerPtr = NULL;
+
+        svt_ret = svt_av1_enc_stream_header(svt_enc->svt_handle, &headerPtr);
+        if (svt_ret != EB_ErrorNone) {
+            return svt_print_error(avctx, svt_ret, "Error when build stream header");
+        }
+
+        avctx->extradata_size = headerPtr->n_filled_len;
+        avctx->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
+        if (!avctx->extradata) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Cannot allocate AV1 header of size %d.\n", avctx->extradata_size);
+            return AVERROR(ENOMEM);
+        }
+
+        memcpy(avctx->extradata, headerPtr->p_buffer, avctx->extradata_size);
+
+        svt_ret = svt_av1_enc_stream_header_release(headerPtr);
+        if (svt_ret != EB_ErrorNone) {
+            return svt_print_error(avctx, svt_ret, "Error when destroy stream header");
+        }
+    }
+
+    svt_enc->frame = av_frame_alloc();
+    if (!svt_enc->frame)
+        return AVERROR(ENOMEM);
+
+    ret = alloc_buffer(&svt_enc->enc_params, svt_enc);
+    if (ret < 0)
+        return ret;
+    return 0;
+
+}
+
+static int eb_send_frame(AVCodecContext *avctx, const AVFrame *frame)
+{
+    SvtContext           *svt_enc = avctx->priv_data;
+    EbBufferHeaderType  *headerPtr = svt_enc->in_buf;
+
+    if (!frame) {
+        EbBufferHeaderType headerPtrLast;
+
+        if (svt_enc->eos_flag == EOS_SENT)
+            return 0;
+
+        headerPtrLast.n_alloc_len   = 0;
+        headerPtrLast.n_filled_len  = 0;
+        headerPtrLast.n_tick_count  = 0;
+        headerPtrLast.p_app_private = NULL;
+        headerPtrLast.p_buffer     = NULL;
+        headerPtrLast.flags      = EB_BUFFERFLAG_EOS;
+
+        svt_av1_enc_send_picture(svt_enc->svt_handle, &headerPtrLast);
+        svt_enc->eos_flag = EOS_SENT;
+        av_log(avctx, AV_LOG_DEBUG, "Finish sending frames!!!\n");
+        return 0;
+    }
+
+    read_in_data(frame, headerPtr);
+
+    headerPtr->flags       = 0;
+    headerPtr->p_app_private  = NULL;
+    headerPtr->pts          = frame->pts;
+
+    svt_av1_enc_send_picture(svt_enc->svt_handle, headerPtr);
+
+    return 0;
+}
+
+static AVBufferRef* get_output_ref(AVCodecContext *avctx, SvtContext  *svt_enc, int filled_len)
+{
+    if (filled_len > svt_enc->max_tu_size) {
+        const int MAX_FRAMES = 8;
+        int max_tu_size;
+        if (filled_len > svt_enc->raw_size * MAX_FRAMES) {
+            av_log(avctx, AV_LOG_ERROR, "something wrong in libsvtav1, the tu size > %d raw frame size.\n", MAX_FRAMES);
+            return NULL;
+        }
+        max_tu_size = 1 << av_ceil_log2(filled_len);
+        av_buffer_pool_uninit(&svt_enc->pool);
+        svt_enc->pool = av_buffer_pool_init(max_tu_size, NULL);
+        if (!svt_enc->pool) {
+            return NULL;
+        }
+        svt_enc->max_tu_size = max_tu_size;
+    }
+    if (!svt_enc->pool) {
+         av_log(avctx, AV_LOG_ERROR, "bug, no buffer pool.\n");
+         return NULL;
+    }
+    return av_buffer_pool_get(svt_enc->pool);
+}
+
+static int eb_receive_packet(AVCodecContext *avctx, AVPacket *pkt)
+{
+    SvtContext  *svt_enc = avctx->priv_data;
+    EbBufferHeaderType *headerPtr;
+    AVFrame *frame = svt_enc->frame;
+    EbErrorType svt_ret;
+    int ret = 0, pict_type;
+    AVBufferRef* ref;
+
+    if (svt_enc->eos_flag == EOS_RECEIVED)
+        return AVERROR_EOF;
+
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58, 93, 100)
+    ret = ff_encode_get_frame(avctx, frame);
+    if (ret < 0 && ret != AVERROR_EOF)
+        return ret;
+    if (ret == AVERROR_EOF)
+        frame = NULL;
+
+    eb_send_frame(avctx, frame);
+    av_frame_unref(svt_enc->frame);
+#endif
+
+    svt_ret = svt_av1_enc_get_packet(svt_enc->svt_handle, &headerPtr, svt_enc->eos_flag);
+    if (svt_ret == EB_NoErrorEmptyQueue)
+        return AVERROR(EAGAIN);
+
+    ref = get_output_ref(avctx, svt_enc, headerPtr->n_filled_len);
+    if (!ref) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate output packet.\n");
+        svt_av1_enc_release_out_buffer(&headerPtr);
+        return AVERROR(ENOMEM);
+    }
+    pkt->buf = ref;
+    pkt->data = ref->data;
+
+    memcpy(pkt->data, headerPtr->p_buffer, headerPtr->n_filled_len);
+    pkt->size = headerPtr->n_filled_len;
+    pkt->pts  = headerPtr->pts;
+    pkt->dts  = headerPtr->dts;
+    if (headerPtr->pic_type == EB_AV1_KEY_PICTURE) {
+        pkt->flags |= AV_PKT_FLAG_KEY;
+        pict_type = AV_PICTURE_TYPE_I;
+    } else if (headerPtr->pic_type == EB_AV1_INTRA_ONLY_PICTURE) {
+        pict_type = AV_PICTURE_TYPE_I;
+    } else if (headerPtr->pic_type == EB_AV1_INVALID_PICTURE) {
+        pict_type = AV_PICTURE_TYPE_NONE;
+    } else
+        pict_type = AV_PICTURE_TYPE_P;
+
+    if (headerPtr->pic_type == EB_AV1_NON_REF_PICTURE)
+        pkt->flags |= AV_PKT_FLAG_DISPOSABLE;
+
+    if (headerPtr->flags & EB_BUFFERFLAG_EOS)
+        svt_enc->eos_flag = EOS_RECEIVED;
+
+    ff_side_data_set_encoder_stats(pkt, headerPtr->qp * FF_QP2LAMBDA, NULL, 0, pict_type);
+
+    svt_av1_enc_release_out_buffer(&headerPtr);
+
+    return 0;
+}
+
+static av_cold int eb_enc_close(AVCodecContext *avctx)
+{
+    SvtContext *svt_enc = avctx->priv_data;
+
+    if (svt_enc) {
+        if (svt_enc->svt_handle) {
+            svt_av1_enc_deinit(svt_enc->svt_handle);
+            svt_av1_enc_deinit_handle(svt_enc->svt_handle);
+        }
+
+        av_frame_free(&svt_enc->frame);
+
+        free_buffer(svt_enc);
+        svt_enc = NULL;
+    }
+    return 0;
+}
+
+#define OFFSET(x) offsetof(SvtContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "hielevel", "Hierarchical prediction levels setting", OFFSET(hierarchical_level),
+      AV_OPT_TYPE_INT, { .i64 = 4 }, 3, 4, VE , "hielevel"},
+        { "3level", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 },  INT_MIN, INT_MAX, VE, "hielevel" },
+        { "4level", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 4 },  INT_MIN, INT_MAX, VE, "hielevel" },
+
+    { "la_depth", "Look ahead distance [0, 120]", OFFSET(la_depth),
+      AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 120, VE },
+
+    { "preset", "Encoding preset [0, 8]",
+      OFFSET(enc_mode), AV_OPT_TYPE_INT, { .i64 = MAX_ENC_PRESET }, 0, MAX_ENC_PRESET, VE },
+
+    { "profile", "Set profile restrictions", OFFSET(profile), AV_OPT_TYPE_INT, { .i64 = MAIN_PROFILE}, MAIN_PROFILE, PROFESSIONAL_PROFILE, VE, "profile" },
+    { "main" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MAIN_PROFILE}, INT_MIN, INT_MAX,     VE, "profile" },
+    { "high" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HIGH_PROFILE}, INT_MIN, INT_MAX,     VE, "profile" },
+    { "professional", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PROFESSIONAL_PROFILE }, INT_MIN, INT_MAX,     VE, "profile" },
+
+    { "tier", "Set tier (general_tier_flag)", OFFSET(tier),
+      AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE, "tier" },
+        { "main", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, VE, "tier" },
+        { "high", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, VE, "tier" },
+
+    { "level", "Set level (level_idc)", OFFSET(level),
+      AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0x1f, VE, "level" },
+
+#define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
+      { .i64 = value }, 0, 0, VE, "level"
+        { LEVEL("2.0", 20) },
+        { LEVEL("2.1", 21) },
+        { LEVEL("2.2", 22) },
+        { LEVEL("2.3", 23) },
+        { LEVEL("3.0", 30) },
+        { LEVEL("3.1", 31) },
+        { LEVEL("3.2", 32) },
+        { LEVEL("3.3", 33) },
+        { LEVEL("4.0", 40) },
+        { LEVEL("4.1", 41) },
+        { LEVEL("4.2", 42) },
+        { LEVEL("4.3", 43) },
+        { LEVEL("5.0", 50) },
+        { LEVEL("5.1", 51) },
+        { LEVEL("5.2", 52) },
+        { LEVEL("5.3", 53) },
+        { LEVEL("6.0", 60) },
+        { LEVEL("6.1", 61) },
+        { LEVEL("6.2", 62) },
+        { LEVEL("6.3", 63) },
+        { LEVEL("7.0", 70) },
+        { LEVEL("7.1", 71) },
+        { LEVEL("7.2", 72) },
+        { LEVEL("7.3", 73) },
+#undef LEVEL
+
+    { "rc", "Bit rate control mode", OFFSET(rc_mode),
+      AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 3, VE , "rc"},
+        { "cqp", "Const Quantization Parameter", 0, AV_OPT_TYPE_CONST, { .i64 = 0 },  INT_MIN, INT_MAX, VE, "rc" },
+        { "vbr", "Variable Bit Rate, use a target bitrate for the entire stream", 0, AV_OPT_TYPE_CONST, { .i64 = 1 },  INT_MIN, INT_MAX, VE, "rc" },
+        { "cvbr", "Constrained Variable Bit Rate, use a target bitrate for each GOP", 0, AV_OPT_TYPE_CONST,{ .i64 = 2 },  INT_MIN, INT_MAX, VE, "rc" },
+
+    { "qp", "QP value for intra frames", OFFSET(qp),
+      AV_OPT_TYPE_INT, { .i64 = 50 }, 0, 63, VE },
+
+    { "sc_detection", "Scene change detection", OFFSET(scd),
+      AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+
+    { "forced-idr", "If forcing keyframes, force them as IDR frames.", OFFSET(forced_idr),
+      AV_OPT_TYPE_BOOL,   { .i64 = 1 }, 0, 1, VE },
+    { "tile-columns",     "Log2 of number of tile columns to use", OFFSET(tile_columns), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, VE},
+    { "tile-rows",        "Log2 of number of tile rows to use",    OFFSET(tile_rows), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 6, VE},
+
+    {NULL},
+};
+
+static const AVClass class = {
+    .class_name = "libsvt_av1",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault eb_enc_defaults[] = {
+    { "b",         "7M"    },
+    { "g",         "-2"    },
+    { "qmin",      "0"     },
+    { "qmax",      "63"    },
+    { NULL },
+};
+
+AVCodec ff_libsvt_av1_encoder = {
+    .name           = "libsvt_av1",
+    .long_name      = NULL_IF_CONFIG_SMALL("SVT-AV1(Scalable Video Technology for AV1) encoder"),
+    .priv_data_size = sizeof(SvtContext),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_AV1,
+    .init           = eb_enc_init,
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 93, 100)
+    .send_frame     = eb_send_frame,
+#endif
+    .receive_packet = eb_receive_packet,
+    .close          = eb_enc_close,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
+                                                    AV_PIX_FMT_YUV420P10,
+                                                    AV_PIX_FMT_NONE },
+    .priv_class     = &class,
+    .defaults       = eb_enc_defaults,
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
+    .wrapper_name   = "libsvt_av1",
+};
-- 
2.17.1

