/*
  * Copyright (c) 2010, Google, Inc.
  *

  * 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
  */
 

 /**
  * @file
  * AV1 encoder support via libaom
  */
 

 #define AOM_DISABLE_CTRL_TYPECHECKS 1
 #include <aom/aom_encoder.h>
 #include <aom/aomcx.h>
 

 #include "libavutil/avassert.h"

 #include "libavutil/base64.h"
 #include "libavutil/common.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 

 #include "av1.h"

 #include "avcodec.h"
 #include "internal.h"

 #include "packet_internal.h"

 #include "profiles.h"

 
 /*
  * Portion of struct aom_codec_cx_pkt from aom_encoder.h.
  * One encoded frame returned from the library.
  */
 struct FrameListData {

     void *buf;                       /**< compressed data buffer */
     size_t sz;                       /**< length of compressed data */
     int64_t pts;                     /**< time stamp to show frame
                                           (in timebase units) */
     unsigned long duration;          /**< duration to show frame
                                           (in timebase units) */
     uint32_t flags;                  /**< flags for this frame */

     uint64_t sse[4];
     int have_sse;                    /**< true if we have pending sse[] */
     uint64_t frame_number;

     struct FrameListData *next;
 };
 
 typedef struct AOMEncoderContext {
     AVClass *class;

     AVBSFContext *bsf;

     struct aom_codec_ctx encoder;
     struct aom_image rawimg;
     struct aom_fixed_buf twopass_stats;
     struct FrameListData *coded_frame_list;
     int cpu_used;
     int auto_alt_ref;

     int arnr_max_frames;
     int arnr_strength;
     int aq_mode;

     int lag_in_frames;
     int error_resilient;
     int crf;
     int static_thresh;
     int drop_threshold;

     int denoise_noise_level;
     int denoise_block_size;

     uint64_t sse[4];
     int have_sse; /**< true if we have pending sse[] */
     uint64_t frame_number;

     int rc_undershoot_pct;
     int rc_overshoot_pct;
     int minsection_pct;
     int maxsection_pct;
     int frame_parallel;

     int tile_cols, tile_rows;
     int tile_cols_log2, tile_rows_log2;
     aom_superblock_size_t superblock_size;
     int uniform_tiles;

     int row_mt;

     int enable_cdef;
     int enable_global_motion;
     int enable_intrabc;

     int enable_restoration;

     int usage;

     int tune;

 } AOMContext;
 
 static const char *const ctlidstr[] = {
     [AOME_SET_CPUUSED]          = "AOME_SET_CPUUSED",
     [AOME_SET_CQ_LEVEL]         = "AOME_SET_CQ_LEVEL",
     [AOME_SET_ENABLEAUTOALTREF] = "AOME_SET_ENABLEAUTOALTREF",

     [AOME_SET_ARNR_MAXFRAMES]   = "AOME_SET_ARNR_MAXFRAMES",
     [AOME_SET_ARNR_STRENGTH]    = "AOME_SET_ARNR_STRENGTH",

     [AOME_SET_STATIC_THRESHOLD] = "AOME_SET_STATIC_THRESHOLD",

     [AV1E_SET_COLOR_RANGE]      = "AV1E_SET_COLOR_RANGE",

     [AV1E_SET_COLOR_PRIMARIES]  = "AV1E_SET_COLOR_PRIMARIES",
     [AV1E_SET_MATRIX_COEFFICIENTS] = "AV1E_SET_MATRIX_COEFFICIENTS",
     [AV1E_SET_TRANSFER_CHARACTERISTICS] = "AV1E_SET_TRANSFER_CHARACTERISTICS",

     [AV1E_SET_AQ_MODE]          = "AV1E_SET_AQ_MODE",
     [AV1E_SET_FRAME_PARALLEL_DECODING] = "AV1E_SET_FRAME_PARALLEL_DECODING",

     [AV1E_SET_SUPERBLOCK_SIZE]  = "AV1E_SET_SUPERBLOCK_SIZE",
     [AV1E_SET_TILE_COLUMNS]     = "AV1E_SET_TILE_COLUMNS",
     [AV1E_SET_TILE_ROWS]        = "AV1E_SET_TILE_ROWS",

     [AV1E_SET_ENABLE_RESTORATION] = "AV1E_SET_ENABLE_RESTORATION",

 #ifdef AOM_CTRL_AV1E_SET_ROW_MT
     [AV1E_SET_ROW_MT]           = "AV1E_SET_ROW_MT",
 #endif

 #ifdef AOM_CTRL_AV1E_SET_DENOISE_NOISE_LEVEL
     [AV1E_SET_DENOISE_NOISE_LEVEL] =  "AV1E_SET_DENOISE_NOISE_LEVEL",
 #endif
 #ifdef AOM_CTRL_AV1E_SET_DENOISE_BLOCK_SIZE
     [AV1E_SET_DENOISE_BLOCK_SIZE] =   "AV1E_SET_DENOISE_BLOCK_SIZE",
 #endif
 #ifdef AOM_CTRL_AV1E_SET_MAX_REFERENCE_FRAMES
     [AV1E_SET_MAX_REFERENCE_FRAMES] = "AV1E_SET_MAX_REFERENCE_FRAMES",
 #endif
 #ifdef AOM_CTRL_AV1E_SET_ENABLE_GLOBAL_MOTION
     [AV1E_SET_ENABLE_GLOBAL_MOTION] = "AV1E_SET_ENABLE_GLOBAL_MOTION",
 #endif
 #ifdef AOM_CTRL_AV1E_SET_ENABLE_INTRABC
     [AV1E_SET_ENABLE_INTRABC]   = "AV1E_SET_ENABLE_INTRABC",
 #endif
     [AV1E_SET_ENABLE_CDEF]      = "AV1E_SET_ENABLE_CDEF",

     [AOME_SET_TUNING]           = "AOME_SET_TUNING",

 };
 
 static av_cold void log_encoder_error(AVCodecContext *avctx, const char *desc)
 {
     AOMContext *ctx    = avctx->priv_data;
     const char *error  = aom_codec_error(&ctx->encoder);
     const char *detail = aom_codec_error_detail(&ctx->encoder);
 
     av_log(avctx, AV_LOG_ERROR, "%s: %s\n", desc, error);
     if (detail)
         av_log(avctx, AV_LOG_ERROR, "  Additional information: %s\n", detail);
 }
 
 static av_cold void dump_enc_cfg(AVCodecContext *avctx,
                                  const struct aom_codec_enc_cfg *cfg)
 {
     int width = -30;
     int level = AV_LOG_DEBUG;
 
     av_log(avctx, level, "aom_codec_enc_cfg\n");
     av_log(avctx, level, "generic settings\n"
                          "  %*s%u\n  %*s%u\n  %*s%u\n  %*s%u\n  %*s%u\n"

                          "  %*s%u\n  %*s%u\n"

                          "  %*s{%u/%u}\n  %*s%u\n  %*s%d\n  %*s%u\n",

            width, "g_usage:",           cfg->g_usage,
            width, "g_threads:",         cfg->g_threads,
            width, "g_profile:",         cfg->g_profile,
            width, "g_w:",               cfg->g_w,
            width, "g_h:",               cfg->g_h,
            width, "g_bit_depth:",       cfg->g_bit_depth,
            width, "g_input_bit_depth:", cfg->g_input_bit_depth,
            width, "g_timebase:",        cfg->g_timebase.num, cfg->g_timebase.den,

            width, "g_error_resilient:", cfg->g_error_resilient,

            width, "g_pass:",            cfg->g_pass,
            width, "g_lag_in_frames:",   cfg->g_lag_in_frames);

     av_log(avctx, level, "rate control settings\n"

                          "  %*s%u\n  %*s%d\n  %*s%p(%"SIZE_SPECIFIER")\n  %*s%u\n",

            width, "rc_dropframe_thresh:", cfg->rc_dropframe_thresh,

            width, "rc_end_usage:",        cfg->rc_end_usage,

            width, "rc_twopass_stats_in:", cfg->rc_twopass_stats_in.buf, cfg->rc_twopass_stats_in.sz,

            width, "rc_target_bitrate:",   cfg->rc_target_bitrate);

     av_log(avctx, level, "quantizer settings\n"
                          "  %*s%u\n  %*s%u\n",
            width, "rc_min_quantizer:", cfg->rc_min_quantizer,
            width, "rc_max_quantizer:", cfg->rc_max_quantizer);
     av_log(avctx, level, "bitrate tolerance\n"
                          "  %*s%u\n  %*s%u\n",
            width, "rc_undershoot_pct:", cfg->rc_undershoot_pct,

            width, "rc_overshoot_pct:",  cfg->rc_overshoot_pct);

     av_log(avctx, level, "decoder buffer model\n"
                          "  %*s%u\n  %*s%u\n  %*s%u\n",

            width, "rc_buf_sz:",         cfg->rc_buf_sz,

            width, "rc_buf_initial_sz:", cfg->rc_buf_initial_sz,
            width, "rc_buf_optimal_sz:", cfg->rc_buf_optimal_sz);
     av_log(avctx, level, "2 pass rate control settings\n"
                          "  %*s%u\n  %*s%u\n  %*s%u\n",

            width, "rc_2pass_vbr_bias_pct:",       cfg->rc_2pass_vbr_bias_pct,

            width, "rc_2pass_vbr_minsection_pct:", cfg->rc_2pass_vbr_minsection_pct,
            width, "rc_2pass_vbr_maxsection_pct:", cfg->rc_2pass_vbr_maxsection_pct);
     av_log(avctx, level, "keyframing settings\n"
                          "  %*s%d\n  %*s%u\n  %*s%u\n",

            width, "kf_mode:",     cfg->kf_mode,

            width, "kf_min_dist:", cfg->kf_min_dist,
            width, "kf_max_dist:", cfg->kf_max_dist);

     av_log(avctx, level, "tile settings\n"
                          "  %*s%d\n  %*s%d\n",
            width, "tile_width_count:",  cfg->tile_width_count,
            width, "tile_height_count:", cfg->tile_height_count);

     av_log(avctx, level, "\n");
 }
 
 static void coded_frame_add(void *list, struct FrameListData *cx_frame)
 {
     struct FrameListData **p = list;
 
     while (*p)
         p = &(*p)->next;
     *p = cx_frame;
     cx_frame->next = NULL;
 }
 
 static av_cold void free_coded_frame(struct FrameListData *cx_frame)
 {
     av_freep(&cx_frame->buf);
     av_freep(&cx_frame);
 }
 
 static av_cold void free_frame_list(struct FrameListData *list)
 {
     struct FrameListData *p = list;
 
     while (p) {
         list = list->next;
         free_coded_frame(p);
         p = list;
     }
 }
 
 static av_cold int codecctl_int(AVCodecContext *avctx,

 #ifdef UENUM1BYTE
                                 aome_enc_control_id id,
 #else
                                 enum aome_enc_control_id id,
 #endif
                                 int val)

 {
     AOMContext *ctx = avctx->priv_data;
     char buf[80];
     int width = -30;
     int res;
 
     snprintf(buf, sizeof(buf), "%s:", ctlidstr[id]);
     av_log(avctx, AV_LOG_DEBUG, "  %*s%d\n", width, buf, val);
 
     res = aom_codec_control(&ctx->encoder, id, val);
     if (res != AOM_CODEC_OK) {
         snprintf(buf, sizeof(buf), "Failed to set %s codec control",
                  ctlidstr[id]);
         log_encoder_error(avctx, buf);
         return AVERROR(EINVAL);
     }
 
     return 0;
 }
 
 static av_cold int aom_free(AVCodecContext *avctx)
 {
     AOMContext *ctx = avctx->priv_data;
 
     aom_codec_destroy(&ctx->encoder);
     av_freep(&ctx->twopass_stats.buf);
     av_freep(&avctx->stats_out);
     free_frame_list(ctx->coded_frame_list);

     av_bsf_free(&ctx->bsf);

     return 0;
 }
 

 static int set_pix_fmt(AVCodecContext *avctx, aom_codec_caps_t codec_caps,
                        struct aom_codec_enc_cfg *enccfg, aom_codec_flags_t *flags,
                        aom_img_fmt_t *img_fmt)
 {
     AOMContext av_unused *ctx = avctx->priv_data;
     enccfg->g_bit_depth = enccfg->g_input_bit_depth = 8;
     switch (avctx->pix_fmt) {
     case AV_PIX_FMT_YUV420P:
         enccfg->g_profile = FF_PROFILE_AV1_MAIN;
         *img_fmt = AOM_IMG_FMT_I420;
         return 0;
     case AV_PIX_FMT_YUV422P:
         enccfg->g_profile = FF_PROFILE_AV1_PROFESSIONAL;
         *img_fmt = AOM_IMG_FMT_I422;
         return 0;
     case AV_PIX_FMT_YUV444P:
         enccfg->g_profile = FF_PROFILE_AV1_HIGH;
         *img_fmt = AOM_IMG_FMT_I444;
         return 0;
     case AV_PIX_FMT_YUV420P10:
     case AV_PIX_FMT_YUV420P12:
         if (codec_caps & AOM_CODEC_CAP_HIGHBITDEPTH) {
             enccfg->g_bit_depth = enccfg->g_input_bit_depth =
                 avctx->pix_fmt == AV_PIX_FMT_YUV420P10 ? 10 : 12;
             enccfg->g_profile =
                 enccfg->g_bit_depth == 10 ? FF_PROFILE_AV1_MAIN : FF_PROFILE_AV1_PROFESSIONAL;
             *img_fmt = AOM_IMG_FMT_I42016;
             *flags |= AOM_CODEC_USE_HIGHBITDEPTH;
             return 0;
         }
         break;
     case AV_PIX_FMT_YUV422P10:
     case AV_PIX_FMT_YUV422P12:
         if (codec_caps & AOM_CODEC_CAP_HIGHBITDEPTH) {
             enccfg->g_bit_depth = enccfg->g_input_bit_depth =
                 avctx->pix_fmt == AV_PIX_FMT_YUV422P10 ? 10 : 12;
             enccfg->g_profile = FF_PROFILE_AV1_PROFESSIONAL;
             *img_fmt = AOM_IMG_FMT_I42216;
             *flags |= AOM_CODEC_USE_HIGHBITDEPTH;
             return 0;
         }
         break;
     case AV_PIX_FMT_YUV444P10:
     case AV_PIX_FMT_YUV444P12:
         if (codec_caps & AOM_CODEC_CAP_HIGHBITDEPTH) {
             enccfg->g_bit_depth = enccfg->g_input_bit_depth =

                 avctx->pix_fmt == AV_PIX_FMT_YUV444P10 ? 10 : 12;

             enccfg->g_profile =
                 enccfg->g_bit_depth == 10 ? FF_PROFILE_AV1_HIGH : FF_PROFILE_AV1_PROFESSIONAL;
             *img_fmt = AOM_IMG_FMT_I44416;
             *flags |= AOM_CODEC_USE_HIGHBITDEPTH;
             return 0;
         }
         break;
     default:
         break;
     }
     av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format.\n");
     return AVERROR_INVALIDDATA;
 }
 
 static void set_color_range(AVCodecContext *avctx)
 {

     aom_color_range_t aom_cr;

     switch (avctx->color_range) {
     case AVCOL_RANGE_UNSPECIFIED:
     case AVCOL_RANGE_MPEG:       aom_cr = AOM_CR_STUDIO_RANGE; break;
     case AVCOL_RANGE_JPEG:       aom_cr = AOM_CR_FULL_RANGE;   break;
     default:
         av_log(avctx, AV_LOG_WARNING, "Unsupported color range (%d)\n",
                avctx->color_range);
         return;
     }
 
     codecctl_int(avctx, AV1E_SET_COLOR_RANGE, aom_cr);
 }
 

 static int count_uniform_tiling(int dim, int sb_size, int tiles_log2)
 {
     int sb_dim   = (dim + sb_size - 1) / sb_size;
     int tile_dim = (sb_dim + (1 << tiles_log2) - 1) >> tiles_log2;
     av_assert0(tile_dim > 0);
     return (sb_dim + tile_dim - 1) / tile_dim;
 }
 
 static int choose_tiling(AVCodecContext *avctx,
                          struct aom_codec_enc_cfg *enccfg)
 {
     AOMContext *ctx = avctx->priv_data;
     int sb_128x128_possible, sb_size, sb_width, sb_height;
     int uniform_rows, uniform_cols;
     int uniform_64x64_possible, uniform_128x128_possible;
     int tile_size, rounding, i;
 
     if (ctx->tile_cols_log2 >= 0)
         ctx->tile_cols = 1 << ctx->tile_cols_log2;
     if (ctx->tile_rows_log2 >= 0)
         ctx->tile_rows = 1 << ctx->tile_rows_log2;
 
     if (ctx->tile_cols == 0) {
         ctx->tile_cols = (avctx->width + AV1_MAX_TILE_WIDTH - 1) /
             AV1_MAX_TILE_WIDTH;
         if (ctx->tile_cols > 1) {
             av_log(avctx, AV_LOG_DEBUG, "Automatically using %d tile "
                    "columns to fill width.\n", ctx->tile_cols);
         }
     }
     av_assert0(ctx->tile_cols > 0);
     if (ctx->tile_rows == 0) {
         int max_tile_width =
             FFALIGN((FFALIGN(avctx->width, 128) +
                      ctx->tile_cols - 1) / ctx->tile_cols, 128);
         ctx->tile_rows =
             (max_tile_width * FFALIGN(avctx->height, 128) +
              AV1_MAX_TILE_AREA - 1) / AV1_MAX_TILE_AREA;
         if (ctx->tile_rows > 1) {
             av_log(avctx, AV_LOG_DEBUG, "Automatically using %d tile "
                    "rows to fill area.\n", ctx->tile_rows);
         }
     }
     av_assert0(ctx->tile_rows > 0);
 
     if ((avctx->width  + 63) / 64 < ctx->tile_cols ||
         (avctx->height + 63) / 64 < ctx->tile_rows) {
         av_log(avctx, AV_LOG_ERROR, "Invalid tile sizing: frame not "
                "large enough to fit specified tile arrangement.\n");
         return AVERROR(EINVAL);
     }
     if (ctx->tile_cols > AV1_MAX_TILE_COLS ||
         ctx->tile_rows > AV1_MAX_TILE_ROWS) {
         av_log(avctx, AV_LOG_ERROR, "Invalid tile sizing: AV1 does "
                "not allow more than %dx%d tiles.\n",
                AV1_MAX_TILE_COLS, AV1_MAX_TILE_ROWS);
         return AVERROR(EINVAL);
     }
     if (avctx->width / ctx->tile_cols > AV1_MAX_TILE_WIDTH) {
         av_log(avctx, AV_LOG_ERROR, "Invalid tile sizing: AV1 does "
                "not allow tiles of width greater than %d.\n",
                AV1_MAX_TILE_WIDTH);
         return AVERROR(EINVAL);
     }
 
     ctx->superblock_size = AOM_SUPERBLOCK_SIZE_DYNAMIC;
 
     if (ctx->tile_cols == 1 && ctx->tile_rows == 1) {
         av_log(avctx, AV_LOG_DEBUG, "Using a single tile.\n");
         return 0;
     }
 
     sb_128x128_possible =
         (avctx->width  + 127) / 128 >= ctx->tile_cols &&
         (avctx->height + 127) / 128 >= ctx->tile_rows;
 
     ctx->tile_cols_log2 = ctx->tile_cols == 1 ? 0 :
         av_log2(ctx->tile_cols - 1) + 1;
     ctx->tile_rows_log2 = ctx->tile_rows == 1 ? 0 :
         av_log2(ctx->tile_rows - 1) + 1;
 
     uniform_cols = count_uniform_tiling(avctx->width,
                                         64, ctx->tile_cols_log2);
     uniform_rows = count_uniform_tiling(avctx->height,
                                         64, ctx->tile_rows_log2);
     av_log(avctx, AV_LOG_DEBUG, "Uniform with 64x64 superblocks "
            "-> %dx%d tiles.\n", uniform_cols, uniform_rows);
     uniform_64x64_possible = uniform_cols == ctx->tile_cols &&
                              uniform_rows == ctx->tile_rows;
 
     if (sb_128x128_possible) {
         uniform_cols = count_uniform_tiling(avctx->width,
                                             128, ctx->tile_cols_log2);
         uniform_rows = count_uniform_tiling(avctx->height,
                                             128, ctx->tile_rows_log2);
         av_log(avctx, AV_LOG_DEBUG, "Uniform with 128x128 superblocks "
                "-> %dx%d tiles.\n", uniform_cols, uniform_rows);
         uniform_128x128_possible = uniform_cols == ctx->tile_cols &&
                                    uniform_rows == ctx->tile_rows;
     } else {
         av_log(avctx, AV_LOG_DEBUG, "128x128 superblocks not possible.\n");
         uniform_128x128_possible = 0;
     }
 
     ctx->uniform_tiles = 1;
     if (uniform_64x64_possible && uniform_128x128_possible) {
         av_log(avctx, AV_LOG_DEBUG, "Using uniform tiling with dynamic "
                "superblocks (tile_cols_log2 = %d, tile_rows_log2 = %d).\n",
                ctx->tile_cols_log2, ctx->tile_rows_log2);
         return 0;
     }
     if (uniform_64x64_possible && !sb_128x128_possible) {
         av_log(avctx, AV_LOG_DEBUG, "Using uniform tiling with 64x64 "
                "superblocks (tile_cols_log2 = %d, tile_rows_log2 = %d).\n",
                ctx->tile_cols_log2, ctx->tile_rows_log2);
         ctx->superblock_size = AOM_SUPERBLOCK_SIZE_64X64;
         return 0;
     }
     if (uniform_128x128_possible) {
         av_log(avctx, AV_LOG_DEBUG, "Using uniform tiling with 128x128 "
                "superblocks (tile_cols_log2 = %d, tile_rows_log2 = %d).\n",
                ctx->tile_cols_log2, ctx->tile_rows_log2);
         ctx->superblock_size = AOM_SUPERBLOCK_SIZE_128X128;
         return 0;
     }
     ctx->uniform_tiles = 0;
 
     if (sb_128x128_possible) {
         sb_size = 128;
         ctx->superblock_size = AOM_SUPERBLOCK_SIZE_128X128;
     } else {
         sb_size = 64;
         ctx->superblock_size = AOM_SUPERBLOCK_SIZE_64X64;
     }
     av_log(avctx, AV_LOG_DEBUG, "Using fixed tiling with %dx%d "
            "superblocks (tile_cols = %d, tile_rows = %d).\n",
            sb_size, sb_size, ctx->tile_cols, ctx->tile_rows);
 
     enccfg->tile_width_count  = ctx->tile_cols;
     enccfg->tile_height_count = ctx->tile_rows;
 
     sb_width  = (avctx->width  + sb_size - 1) / sb_size;
     sb_height = (avctx->height + sb_size - 1) / sb_size;
 
     tile_size = sb_width / ctx->tile_cols;
     rounding  = sb_width % ctx->tile_cols;
     for (i = 0; i < ctx->tile_cols; i++) {
         enccfg->tile_widths[i] = tile_size +
             (i < rounding / 2 ||
              i > ctx->tile_cols - 1 - (rounding + 1) / 2);
     }
 
     tile_size = sb_height / ctx->tile_rows;
     rounding  = sb_height % ctx->tile_rows;
     for (i = 0; i < ctx->tile_rows; i++) {
         enccfg->tile_heights[i] = tile_size +
             (i < rounding / 2 ||
              i > ctx->tile_rows - 1 - (rounding + 1) / 2);
     }
 
     return 0;
 }
 

 static av_cold int aom_init(AVCodecContext *avctx,
                             const struct aom_codec_iface *iface)

 {
     AOMContext *ctx = avctx->priv_data;
     struct aom_codec_enc_cfg enccfg = { 0 };

 #ifdef AOM_FRAME_IS_INTRAONLY
     aom_codec_flags_t flags =
         (avctx->flags & AV_CODEC_FLAG_PSNR) ? AOM_CODEC_USE_PSNR : 0;
 #else

     aom_codec_flags_t flags = 0;

 #endif

     AVCPBProperties *cpb_props;
     int res;

     aom_img_fmt_t img_fmt;
     aom_codec_caps_t codec_caps = aom_codec_get_caps(iface);

 
     av_log(avctx, AV_LOG_INFO, "%s\n", aom_codec_version_str());
     av_log(avctx, AV_LOG_VERBOSE, "%s\n", aom_codec_build_config());
 
     if ((res = aom_codec_enc_config_default(iface, &enccfg, 0)) != AOM_CODEC_OK) {
         av_log(avctx, AV_LOG_ERROR, "Failed to get config: %s\n",
                aom_codec_err_to_string(res));
         return AVERROR(EINVAL);
     }

 
     if (set_pix_fmt(avctx, codec_caps, &enccfg, &flags, &img_fmt))
         return AVERROR(EINVAL);
 
     if(!avctx->bit_rate)
         if(avctx->rc_max_rate || avctx->rc_buffer_size || avctx->rc_initial_buffer_occupancy) {
             av_log( avctx, AV_LOG_ERROR, "Rate control parameters set without a bitrate\n");
             return AVERROR(EINVAL);
         }
 

     dump_enc_cfg(avctx, &enccfg);
 
     enccfg.g_w            = avctx->width;
     enccfg.g_h            = avctx->height;
     enccfg.g_timebase.num = avctx->time_base.num;
     enccfg.g_timebase.den = avctx->time_base.den;

     enccfg.g_threads      =
         FFMIN(avctx->thread_count ? avctx->thread_count : av_cpu_count(), 64);

     enccfg.g_usage        = ctx->usage;
 

     if (ctx->lag_in_frames >= 0)
         enccfg.g_lag_in_frames = ctx->lag_in_frames;
 
     if (avctx->flags & AV_CODEC_FLAG_PASS1)
         enccfg.g_pass = AOM_RC_FIRST_PASS;
     else if (avctx->flags & AV_CODEC_FLAG_PASS2)
         enccfg.g_pass = AOM_RC_LAST_PASS;
     else
         enccfg.g_pass = AOM_RC_ONE_PASS;
 

     if (avctx->rc_min_rate == avctx->rc_max_rate &&
         avctx->rc_min_rate == avctx->bit_rate && avctx->bit_rate) {
         enccfg.rc_end_usage = AOM_CBR;
     } else if (ctx->crf >= 0) {
         enccfg.rc_end_usage = AOM_CQ;
         if (!avctx->bit_rate)
             enccfg.rc_end_usage = AOM_Q;
     }
 
     if (avctx->bit_rate) {

         enccfg.rc_target_bitrate = av_rescale_rnd(avctx->bit_rate, 1, 1000,
                                                   AV_ROUND_NEAR_INF);

     } else if (enccfg.rc_end_usage != AOM_Q) {

         enccfg.rc_end_usage = AOM_Q;
         ctx->crf = 32;
         av_log(avctx, AV_LOG_WARNING,
                "Neither bitrate nor constrained quality specified, using default CRF of %d\n",
                ctx->crf);

     }

     if (avctx->qmin >= 0)

         enccfg.rc_min_quantizer = avctx->qmin;

     if (avctx->qmax >= 0)

         enccfg.rc_max_quantizer = avctx->qmax;
 

     if (enccfg.rc_end_usage == AOM_CQ || enccfg.rc_end_usage == AOM_Q) {

         if (ctx->crf < enccfg.rc_min_quantizer || ctx->crf > enccfg.rc_max_quantizer) {
             av_log(avctx, AV_LOG_ERROR,
                    "CQ level %d must be between minimum and maximum quantizer value (%d-%d)\n",
                    ctx->crf, enccfg.rc_min_quantizer, enccfg.rc_max_quantizer);
             return AVERROR(EINVAL);
         }
     }
 

     enccfg.rc_dropframe_thresh = ctx->drop_threshold;
 
     // 0-100 (0 => CBR, 100 => VBR)
     enccfg.rc_2pass_vbr_bias_pct       = round(avctx->qcompress * 100);

     if (ctx->minsection_pct >= 0)
         enccfg.rc_2pass_vbr_minsection_pct = ctx->minsection_pct;
     else if (avctx->bit_rate)

         enccfg.rc_2pass_vbr_minsection_pct =
             avctx->rc_min_rate * 100LL / avctx->bit_rate;

     if (ctx->maxsection_pct >= 0)
         enccfg.rc_2pass_vbr_maxsection_pct = ctx->maxsection_pct;
     else if (avctx->rc_max_rate)

         enccfg.rc_2pass_vbr_maxsection_pct =
             avctx->rc_max_rate * 100LL / avctx->bit_rate;
 
     if (avctx->rc_buffer_size)
         enccfg.rc_buf_sz =
             avctx->rc_buffer_size * 1000LL / avctx->bit_rate;
     if (avctx->rc_initial_buffer_occupancy)
         enccfg.rc_buf_initial_sz =
             avctx->rc_initial_buffer_occupancy * 1000LL / avctx->bit_rate;
     enccfg.rc_buf_optimal_sz = enccfg.rc_buf_sz * 5 / 6;
 

     if (ctx->rc_undershoot_pct >= 0)
         enccfg.rc_undershoot_pct = ctx->rc_undershoot_pct;
     if (ctx->rc_overshoot_pct >= 0)
         enccfg.rc_overshoot_pct = ctx->rc_overshoot_pct;
 

     // _enc_init() will balk if kf_min_dist differs from max w/AOM_KF_AUTO
     if (avctx->keyint_min >= 0 && avctx->keyint_min == avctx->gop_size)
         enccfg.kf_min_dist = avctx->keyint_min;
     if (avctx->gop_size >= 0)
         enccfg.kf_max_dist = avctx->gop_size;
 
     if (enccfg.g_pass == AOM_RC_FIRST_PASS)
         enccfg.g_lag_in_frames = 0;
     else if (enccfg.g_pass == AOM_RC_LAST_PASS) {
         int decode_size, ret;
 
         if (!avctx->stats_in) {
             av_log(avctx, AV_LOG_ERROR, "No stats file for second pass\n");
             return AVERROR_INVALIDDATA;
         }
 
         ctx->twopass_stats.sz = strlen(avctx->stats_in) * 3 / 4;
         ret                   = av_reallocp(&ctx->twopass_stats.buf, ctx->twopass_stats.sz);
         if (ret < 0) {
             av_log(avctx, AV_LOG_ERROR,

                    "Stat buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",

                    ctx->twopass_stats.sz);

             ctx->twopass_stats.sz = 0;

             return ret;
         }
         decode_size = av_base64_decode(ctx->twopass_stats.buf, avctx->stats_in,
                                        ctx->twopass_stats.sz);
         if (decode_size < 0) {
             av_log(avctx, AV_LOG_ERROR, "Stat buffer decode failed\n");
             return AVERROR_INVALIDDATA;
         }
 
         ctx->twopass_stats.sz      = decode_size;
         enccfg.rc_twopass_stats_in = ctx->twopass_stats;
     }
 
     /* 0-3: For non-zero values the encoder increasingly optimizes for reduced
      * complexity playback on low powered devices at the expense of encode
      * quality. */
     if (avctx->profile != FF_PROFILE_UNKNOWN)
         enccfg.g_profile = avctx->profile;
 
     enccfg.g_error_resilient = ctx->error_resilient;
 

     res = choose_tiling(avctx, &enccfg);
     if (res < 0)
         return res;
 

     dump_enc_cfg(avctx, &enccfg);
     /* Construct Encoder Context */

     res = aom_codec_enc_init(&ctx->encoder, iface, &enccfg, flags);

     if (res != AOM_CODEC_OK) {
         log_encoder_error(avctx, "Failed to initialize encoder");
         return AVERROR(EINVAL);
     }
 
     // codec control failures are currently treated only as warnings
     av_log(avctx, AV_LOG_DEBUG, "aom_codec_control\n");

     codecctl_int(avctx, AOME_SET_CPUUSED, ctx->cpu_used);

     if (ctx->auto_alt_ref >= 0)
         codecctl_int(avctx, AOME_SET_ENABLEAUTOALTREF, ctx->auto_alt_ref);

     if (ctx->arnr_max_frames >= 0)
         codecctl_int(avctx, AOME_SET_ARNR_MAXFRAMES,   ctx->arnr_max_frames);
     if (ctx->arnr_strength >= 0)
         codecctl_int(avctx, AOME_SET_ARNR_STRENGTH,    ctx->arnr_strength);
     if (ctx->enable_cdef >= 0)
         codecctl_int(avctx, AV1E_SET_ENABLE_CDEF, ctx->enable_cdef);

     if (ctx->enable_restoration >= 0)
         codecctl_int(avctx, AV1E_SET_ENABLE_RESTORATION, ctx->enable_restoration);
 

     codecctl_int(avctx, AOME_SET_STATIC_THRESHOLD, ctx->static_thresh);

     if (ctx->crf >= 0)
         codecctl_int(avctx, AOME_SET_CQ_LEVEL,          ctx->crf);

     if (ctx->tune >= 0)
         codecctl_int(avctx, AOME_SET_TUNING, ctx->tune);

     codecctl_int(avctx, AV1E_SET_COLOR_PRIMARIES, avctx->color_primaries);
     codecctl_int(avctx, AV1E_SET_MATRIX_COEFFICIENTS, avctx->colorspace);
     codecctl_int(avctx, AV1E_SET_TRANSFER_CHARACTERISTICS, avctx->color_trc);

     if (ctx->aq_mode >= 0)
         codecctl_int(avctx, AV1E_SET_AQ_MODE, ctx->aq_mode);
     if (ctx->frame_parallel >= 0)
         codecctl_int(avctx, AV1E_SET_FRAME_PARALLEL_DECODING, ctx->frame_parallel);

     set_color_range(avctx);

     codecctl_int(avctx, AV1E_SET_SUPERBLOCK_SIZE, ctx->superblock_size);
     if (ctx->uniform_tiles) {
         codecctl_int(avctx, AV1E_SET_TILE_COLUMNS, ctx->tile_cols_log2);
         codecctl_int(avctx, AV1E_SET_TILE_ROWS,    ctx->tile_rows_log2);
     }
 

 #ifdef AOM_CTRL_AV1E_SET_DENOISE_NOISE_LEVEL
     if (ctx->denoise_noise_level >= 0)
         codecctl_int(avctx, AV1E_SET_DENOISE_NOISE_LEVEL, ctx->denoise_noise_level);
 #endif
 #ifdef AOM_CTRL_AV1E_SET_DENOISE_BLOCK_SIZE
     if (ctx->denoise_block_size >= 0)
         codecctl_int(avctx, AV1E_SET_DENOISE_BLOCK_SIZE, ctx->denoise_block_size);
 #endif
 #ifdef AOM_CTRL_AV1E_SET_ENABLE_GLOBAL_MOTION
     if (ctx->enable_global_motion >= 0)
         codecctl_int(avctx, AV1E_SET_ENABLE_GLOBAL_MOTION, ctx->enable_global_motion);
 #endif
 #ifdef AOM_CTRL_AV1E_SET_MAX_REFERENCE_FRAMES
     if (avctx->refs >= 3) {
         codecctl_int(avctx, AV1E_SET_MAX_REFERENCE_FRAMES, avctx->refs);
     }
 #endif

 #ifdef AOM_CTRL_AV1E_SET_ROW_MT

     if (ctx->row_mt >= 0)
         codecctl_int(avctx, AV1E_SET_ROW_MT, ctx->row_mt);

 #endif

 #ifdef AOM_CTRL_AV1E_SET_ENABLE_INTRABC
     if (ctx->enable_intrabc >= 0)
         codecctl_int(avctx, AV1E_SET_ENABLE_INTRABC, ctx->enable_intrabc);
 #endif

     // provide dummy value to initialize wrapper, values will be updated each _encode()

     aom_img_wrap(&ctx->rawimg, img_fmt, avctx->width, avctx->height, 1,
                  (unsigned char*)1);
 
     if (codec_caps & AOM_CODEC_CAP_HIGHBITDEPTH)
         ctx->rawimg.bit_depth = enccfg.g_bit_depth;

 
     cpb_props = ff_add_cpb_side_data(avctx);
     if (!cpb_props)
         return AVERROR(ENOMEM);
 

     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
         const AVBitStreamFilter *filter = av_bsf_get_by_name("extract_extradata");
         int ret;
 
         if (!filter) {
             av_log(avctx, AV_LOG_ERROR, "extract_extradata bitstream filter "
                    "not found. This is a bug, please report it.\n");
             return AVERROR_BUG;
         }
         ret = av_bsf_alloc(filter, &ctx->bsf);
         if (ret < 0)
             return ret;
 
         ret = avcodec_parameters_from_context(ctx->bsf->par_in, avctx);
         if (ret < 0)
            return ret;
 
         ret = av_bsf_init(ctx->bsf);
         if (ret < 0)
            return ret;
     }
 

     if (enccfg.rc_end_usage == AOM_CBR ||
         enccfg.g_pass != AOM_RC_ONE_PASS) {
         cpb_props->max_bitrate = avctx->rc_max_rate;
         cpb_props->min_bitrate = avctx->rc_min_rate;
         cpb_props->avg_bitrate = avctx->bit_rate;
     }
     cpb_props->buffer_size = avctx->rc_buffer_size;
 
     return 0;
 }
 

 static inline void cx_pktcpy(AOMContext *ctx,
                              struct FrameListData *dst,

                              const struct aom_codec_cx_pkt *src)
 {
     dst->pts      = src->data.frame.pts;
     dst->duration = src->data.frame.duration;
     dst->flags    = src->data.frame.flags;
     dst->sz       = src->data.frame.sz;
     dst->buf      = src->data.frame.buf;

 #ifdef AOM_FRAME_IS_INTRAONLY
     dst->have_sse = 0;
     dst->frame_number = ++ctx->frame_number;
     dst->have_sse = ctx->have_sse;
     if (ctx->have_sse) {
         /* associate last-seen SSE to the frame. */
         /* Transfers ownership from ctx to dst. */
         memcpy(dst->sse, ctx->sse, sizeof(dst->sse));
         ctx->have_sse = 0;
     }
 #endif

 }
 
 /**
  * Store coded frame information in format suitable for return from encode2().
  *
  * Write information from @a cx_frame to @a pkt
  * @return packet data size on success
  * @return a negative AVERROR on error
  */
 static int storeframe(AVCodecContext *avctx, struct FrameListData *cx_frame,
                       AVPacket *pkt)
 {

     AOMContext *ctx = avctx->priv_data;

     int av_unused pict_type;

     int ret = ff_alloc_packet2(avctx, pkt, cx_frame->sz, 0);

     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR,

                "Error getting output packet of size %"SIZE_SPECIFIER".\n", cx_frame->sz);

         return ret;
     }
     memcpy(pkt->data, cx_frame->buf, pkt->size);
     pkt->pts = pkt->dts = cx_frame->pts;
 

     if (!!(cx_frame->flags & AOM_FRAME_IS_KEY)) {

         pkt->flags |= AV_PKT_FLAG_KEY;

 #ifdef AOM_FRAME_IS_INTRAONLY
         pict_type = AV_PICTURE_TYPE_I;
     } else if (cx_frame->flags & AOM_FRAME_IS_INTRAONLY) {
         pict_type = AV_PICTURE_TYPE_I;
     } else {
         pict_type = AV_PICTURE_TYPE_P;
     }
 
     ff_side_data_set_encoder_stats(pkt, 0, cx_frame->sse + 1,
                                    cx_frame->have_sse ? 3 : 0, pict_type);
 
     if (cx_frame->have_sse) {
         int i;
         for (i = 0; i < 3; ++i) {
             avctx->error[i] += cx_frame->sse[i + 1];
         }
         cx_frame->have_sse = 0;
 #endif
     }

 
     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
         ret = av_bsf_send_packet(ctx->bsf, pkt);
         if (ret < 0) {
             av_log(avctx, AV_LOG_ERROR, "extract_extradata filter "
                    "failed to send input packet\n");
             return ret;
         }
         ret = av_bsf_receive_packet(ctx->bsf, pkt);
 
         if (ret < 0) {
             av_log(avctx, AV_LOG_ERROR, "extract_extradata filter "
                    "failed to receive output packet\n");
             return ret;
         }
     }

     return pkt->size;
 }
 
 /**
  * Queue multiple output frames from the encoder, returning the front-most.
  * In cases where aom_codec_get_cx_data() returns more than 1 frame append
  * the frame queue. Return the head frame if available.
  * @return Stored frame size
  * @return AVERROR(EINVAL) on output size error
  * @return AVERROR(ENOMEM) on coded frame queue data allocation error
  */
 static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out)
 {
     AOMContext *ctx = avctx->priv_data;
     const struct aom_codec_cx_pkt *pkt;
     const void *iter = NULL;
     int size = 0;
 
     if (ctx->coded_frame_list) {
         struct FrameListData *cx_frame = ctx->coded_frame_list;
         /* return the leading frame if we've already begun queueing */
         size = storeframe(avctx, cx_frame, pkt_out);
         if (size < 0)
             return size;
         ctx->coded_frame_list = cx_frame->next;
         free_coded_frame(cx_frame);
     }
 
     /* consume all available output from the encoder before returning. buffers
      * are only good through the next aom_codec call */
     while ((pkt = aom_codec_get_cx_data(&ctx->encoder, &iter))) {
         switch (pkt->kind) {
         case AOM_CODEC_CX_FRAME_PKT:
             if (!size) {
                 struct FrameListData cx_frame;
 
                 /* avoid storing the frame when the list is empty and we haven't yet
                  * provided a frame for output */

                 av_assert0(!ctx->coded_frame_list);

                 cx_pktcpy(ctx, &cx_frame, pkt);

                 size = storeframe(avctx, &cx_frame, pkt_out);
                 if (size < 0)
                     return size;
             } else {
                 struct FrameListData *cx_frame =
                     av_malloc(sizeof(struct FrameListData));
 
                 if (!cx_frame) {
                     av_log(avctx, AV_LOG_ERROR,
                            "Frame queue element alloc failed\n");
                     return AVERROR(ENOMEM);
                 }

                 cx_pktcpy(ctx, cx_frame, pkt);

                 cx_frame->buf = av_malloc(cx_frame->sz);
 
                 if (!cx_frame->buf) {
                     av_log(avctx, AV_LOG_ERROR,

                            "Data buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",

                            cx_frame->sz);
                     av_freep(&cx_frame);
                     return AVERROR(ENOMEM);
                 }
                 memcpy(cx_frame->buf, pkt->data.frame.buf, pkt->data.frame.sz);
                 coded_frame_add(&ctx->coded_frame_list, cx_frame);
             }
             break;
         case AOM_CODEC_STATS_PKT:
         {
             struct aom_fixed_buf *stats = &ctx->twopass_stats;
             int err;
             if ((err = av_reallocp(&stats->buf,
                                    stats->sz +
                                    pkt->data.twopass_stats.sz)) < 0) {
                 stats->sz = 0;
                 av_log(avctx, AV_LOG_ERROR, "Stat buffer realloc failed\n");
                 return err;
             }
             memcpy((uint8_t *)stats->buf + stats->sz,
                    pkt->data.twopass_stats.buf, pkt->data.twopass_stats.sz);
             stats->sz += pkt->data.twopass_stats.sz;
             break;
         }

 #ifdef AOM_FRAME_IS_INTRAONLY
         case AOM_CODEC_PSNR_PKT:
         {
             av_assert0(!ctx->have_sse);
             ctx->sse[0] = pkt->data.psnr.sse[0];
             ctx->sse[1] = pkt->data.psnr.sse[1];
             ctx->sse[2] = pkt->data.psnr.sse[2];
             ctx->sse[3] = pkt->data.psnr.sse[3];
             ctx->have_sse = 1;
             break;
         }
 #endif

         case AOM_CODEC_CUSTOM_PKT:
             // ignore unsupported/unrecognized packet types
             break;
         }
     }
 
     return size;
 }
 
 static int aom_encode(AVCodecContext *avctx, AVPacket *pkt,
                       const AVFrame *frame, int *got_packet)
 {
     AOMContext *ctx = avctx->priv_data;
     struct aom_image *rawimg = NULL;
     int64_t timestamp = 0;
     int res, coded_size;
     aom_enc_frame_flags_t flags = 0;
 
     if (frame) {
         rawimg                      = &ctx->rawimg;
         rawimg->planes[AOM_PLANE_Y] = frame->data[0];
         rawimg->planes[AOM_PLANE_U] = frame->data[1];
         rawimg->planes[AOM_PLANE_V] = frame->data[2];
         rawimg->stride[AOM_PLANE_Y] = frame->linesize[0];
         rawimg->stride[AOM_PLANE_U] = frame->linesize[1];
         rawimg->stride[AOM_PLANE_V] = frame->linesize[2];
         timestamp                   = frame->pts;
         switch (frame->color_range) {
         case AVCOL_RANGE_MPEG:
             rawimg->range = AOM_CR_STUDIO_RANGE;
             break;
         case AVCOL_RANGE_JPEG:
             rawimg->range = AOM_CR_FULL_RANGE;
             break;
         }
 
         if (frame->pict_type == AV_PICTURE_TYPE_I)
             flags |= AOM_EFLAG_FORCE_KF;
     }
 
     res = aom_codec_encode(&ctx->encoder, rawimg, timestamp,
                            avctx->ticks_per_frame, flags);
     if (res != AOM_CODEC_OK) {
         log_encoder_error(avctx, "Error encoding frame");
         return AVERROR_INVALIDDATA;
     }
     coded_size = queue_frames(avctx, pkt);
 
     if (!frame && avctx->flags & AV_CODEC_FLAG_PASS1) {
         size_t b64_size = AV_BASE64_SIZE(ctx->twopass_stats.sz);
 
         avctx->stats_out = av_malloc(b64_size);
         if (!avctx->stats_out) {

             av_log(avctx, AV_LOG_ERROR, "Stat buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",

                    b64_size);
             return AVERROR(ENOMEM);
         }
         av_base64_encode(avctx->stats_out, b64_size, ctx->twopass_stats.buf,
                          ctx->twopass_stats.sz);
     }
 
     *got_packet = !!coded_size;
     return 0;
 }
 

 static const enum AVPixelFormat av1_pix_fmts[] = {
     AV_PIX_FMT_YUV420P,
     AV_PIX_FMT_YUV422P,
     AV_PIX_FMT_YUV444P,
     AV_PIX_FMT_NONE
 };
 
 static const enum AVPixelFormat av1_pix_fmts_highbd[] = {
     AV_PIX_FMT_YUV420P,
     AV_PIX_FMT_YUV422P,
     AV_PIX_FMT_YUV444P,
     AV_PIX_FMT_YUV420P10,
     AV_PIX_FMT_YUV422P10,
     AV_PIX_FMT_YUV444P10,
     AV_PIX_FMT_YUV420P12,
     AV_PIX_FMT_YUV422P12,
     AV_PIX_FMT_YUV444P12,
     AV_PIX_FMT_NONE
 };
 
 static av_cold void av1_init_static(AVCodec *codec)
 {
     aom_codec_caps_t codec_caps = aom_codec_get_caps(aom_codec_av1_cx());
     if (codec_caps & AOM_CODEC_CAP_HIGHBITDEPTH)
         codec->pix_fmts = av1_pix_fmts_highbd;
     else
         codec->pix_fmts = av1_pix_fmts;

 
     if (aom_codec_version_major() < 2)
         codec->capabilities |= AV_CODEC_CAP_EXPERIMENTAL;

 }
 
 static av_cold int av1_init(AVCodecContext *avctx)
 {
     return aom_init(avctx, aom_codec_av1_cx());
 }
 

 #define OFFSET(x) offsetof(AOMContext, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {

     { "cpu-used",        "Quality/Speed ratio modifier",           OFFSET(cpu_used),        AV_OPT_TYPE_INT, {.i64 = 1}, 0, 8, VE},

     { "auto-alt-ref",    "Enable use of alternate reference "

                          "frames (2-pass only)",                   OFFSET(auto_alt_ref),    AV_OPT_TYPE_INT, {.i64 = -1},      -1,      2,       VE},

     { "lag-in-frames",   "Number of frames to look ahead at for "
                          "alternate reference frame selection",    OFFSET(lag_in_frames),   AV_OPT_TYPE_INT, {.i64 = -1},      -1,      INT_MAX, VE},

     { "arnr-max-frames", "altref noise reduction max frame count", OFFSET(arnr_max_frames), AV_OPT_TYPE_INT, {.i64 = -1},      -1,      INT_MAX, VE},
     { "arnr-strength",   "altref noise reduction filter strength", OFFSET(arnr_strength),   AV_OPT_TYPE_INT, {.i64 = -1},      -1,      6,       VE},
     { "aq-mode",         "adaptive quantization mode",             OFFSET(aq_mode),         AV_OPT_TYPE_INT, {.i64 = -1},      -1,      4, VE, "aq_mode"},
     { "none",            "Aq not used",         0, AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 0, VE, "aq_mode"},
     { "variance",        "Variance based Aq",   0, AV_OPT_TYPE_CONST, {.i64 = 1}, 0, 0, VE, "aq_mode"},
     { "complexity",      "Complexity based Aq", 0, AV_OPT_TYPE_CONST, {.i64 = 2}, 0, 0, VE, "aq_mode"},
     { "cyclic",          "Cyclic Refresh Aq",   0, AV_OPT_TYPE_CONST, {.i64 = 3}, 0, 0, VE, "aq_mode"},

     { "error-resilience", "Error resilience configuration", OFFSET(error_resilient), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, VE, "er"},
     { "default",         "Improve resiliency against losses of whole frames", 0, AV_OPT_TYPE_CONST, {.i64 = AOM_ERROR_RESILIENT_DEFAULT}, 0, 0, VE, "er"},

     { "crf",              "Select the quality for constant quality mode", offsetof(AOMContext, crf), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 63, VE },

     { "static-thresh",    "A change threshold on blocks below which they will be skipped by the encoder", OFFSET(static_thresh), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
     { "drop-threshold",   "Frame drop threshold", offsetof(AOMContext, drop_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, VE },

     { "denoise-noise-level", "Amount of noise to be removed", OFFSET(denoise_noise_level), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE},
     { "denoise-block-size", "Denoise block size ", OFFSET(denoise_block_size), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE},
     { "undershoot-pct",   "Datarate undershoot (min) target (%)", OFFSET(rc_undershoot_pct), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 100, VE},
     { "overshoot-pct",    "Datarate overshoot (max) target (%)", OFFSET(rc_overshoot_pct), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1000, VE},
     { "minsection-pct",   "GOP min bitrate (% of target)", OFFSET(minsection_pct), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 100, VE},
     { "maxsection-pct",   "GOP max bitrate (% of target)", OFFSET(maxsection_pct), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 5000, VE},
     { "frame-parallel",   "Enable frame parallel decodability features", OFFSET(frame_parallel),  AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},

     { "tiles",            "Tile columns x rows", OFFSET(tile_cols), AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, VE },
     { "tile-columns",     "Log2 of number of tile columns to use", OFFSET(tile_cols_log2), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
     { "tile-rows",        "Log2 of number of tile rows to use",    OFFSET(tile_rows_log2), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},

     { "row-mt",           "Enable row based multi-threading",      OFFSET(row_mt),         AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},

     { "enable-cdef",      "Enable CDEF filtering",                 OFFSET(enable_cdef),    AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},
     { "enable-global-motion",  "Enable global motion",             OFFSET(enable_global_motion), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},

     { "enable-intrabc",  "Enable intra block copy prediction mode", OFFSET(enable_intrabc), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},

     { "enable-restoration", "Enable Loop Restoration filtering", OFFSET(enable_restoration), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},

     { "usage",           "Quality and compression efficiency vs speed trade-off", OFFSET(usage), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, VE, "usage"},

     { "good",            "Good quality",      0, AV_OPT_TYPE_CONST, {.i64 = 0 /* AOM_USAGE_GOOD_QUALITY */}, 0, 0, VE, "usage"},
     { "realtime",        "Realtime encoding", 0, AV_OPT_TYPE_CONST, {.i64 = 1 /* AOM_USAGE_REALTIME */},     0, 0, VE, "usage"},

     { "tune",            "The metric that the encoder tunes for. Automatically chosen by the encoder by default", OFFSET(tune), AV_OPT_TYPE_INT, {.i64 = -1}, -1, AOM_TUNE_SSIM, VE, "tune"},
     { "psnr",            NULL,         0, AV_OPT_TYPE_CONST, {.i64 = AOM_TUNE_PSNR}, 0, 0, VE, "tune"},
     { "ssim",            NULL,         0, AV_OPT_TYPE_CONST, {.i64 = AOM_TUNE_SSIM}, 0, 0, VE, "tune"},

     { NULL },

 };
 
 static const AVCodecDefault defaults[] = {

     { "b",                 "0" },

     { "qmin",             "-1" },
     { "qmax",             "-1" },
     { "g",                "-1" },
     { "keyint_min",       "-1" },
     { NULL },
 };
 
 static const AVClass class_aom = {

     .class_name = "libaom-av1 encoder",

     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
 };
 
 AVCodec ff_libaom_av1_encoder = {
     .name           = "libaom-av1",
     .long_name      = NULL_IF_CONFIG_SMALL("libaom AV1"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_AV1,
     .priv_data_size = sizeof(AOMContext),

     .init           = av1_init,

     .encode2        = aom_encode,
     .close          = aom_free,

     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,

     .profiles       = NULL_IF_CONFIG_SMALL(ff_av1_profiles),

     .priv_class     = &class_aom,
     .defaults       = defaults,

     .init_static_data = av1_init_static,

     .wrapper_name   = "libaom",
 };