tor-browser

av1_dx_iface.c (63911B)

---

/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/

#include <stdlib.h>
#include <string.h>

#include "config/aom_config.h"
#include "config/aom_version.h"

#include "aom/internal/aom_codec_internal.h"
#include "aom/internal/aom_image_internal.h"
#include "aom/aomdx.h"
#include "aom/aom_decoder.h"
#include "aom/aom_image.h"
#include "aom_dsp/bitreader_buffer.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_ports/mem.h"
#include "aom_ports/mem_ops.h"
#include "aom_util/aom_pthread.h"
#include "aom_util/aom_thread.h"

#include "av1/common/alloccommon.h"
#include "av1/common/av1_common_int.h"
#include "av1/common/frame_buffers.h"
#include "av1/common/enums.h"
#include "av1/common/obu_util.h"

#include "av1/decoder/decoder.h"
#include "av1/decoder/decodeframe.h"
#include "av1/decoder/dthread.h"
#include "av1/decoder/grain_synthesis.h"
#include "av1/decoder/obu.h"

#include "av1/av1_iface_common.h"

struct aom_codec_alg_priv {
 aom_codec_priv_t base;
 aom_codec_dec_cfg_t cfg;
 aom_codec_stream_info_t si;
 aom_image_t img;
 int img_avail;
 int flushed;
 int invert_tile_order;
 RefCntBuffer *last_show_frame;  // Last output frame buffer
 int byte_alignment;
 int skip_loop_filter;
 int skip_film_grain;
 int decode_tile_row;
 int decode_tile_col;
 unsigned int tile_mode;
 unsigned int ext_tile_debug;
 unsigned int row_mt;
 EXTERNAL_REFERENCES ext_refs;
 unsigned int is_annexb;
 int operating_point;
 int output_all_layers;

 AVxWorker *frame_worker;

 aom_image_t image_with_grain;
 aom_codec_frame_buffer_t grain_image_frame_buffers[MAX_NUM_SPATIAL_LAYERS];
 size_t num_grain_image_frame_buffers;
 int need_resync;  // wait for key/intra-only frame
 // BufferPool that holds all reference frames. Shared by all the FrameWorkers.
 BufferPool *buffer_pool;

 // External frame buffer info to save for AV1 common.
 void *ext_priv;  // Private data associated with the external frame buffers.
 aom_get_frame_buffer_cb_fn_t get_ext_fb_cb;
 aom_release_frame_buffer_cb_fn_t release_ext_fb_cb;

#if CONFIG_INSPECTION
 aom_inspect_cb inspect_cb;
 void *inspect_ctx;
#endif
};

static aom_codec_err_t decoder_init(aom_codec_ctx_t *ctx) {
 // This function only allocates space for the aom_codec_alg_priv_t
 // structure. More memory may be required at the time the stream
 // information becomes known.
 if (!ctx->priv) {
   aom_codec_alg_priv_t *const priv =
       (aom_codec_alg_priv_t *)aom_calloc(1, sizeof(*priv));
   if (priv == NULL) return AOM_CODEC_MEM_ERROR;

   ctx->priv = (aom_codec_priv_t *)priv;
   ctx->priv->init_flags = ctx->init_flags;
   priv->flushed = 0;

   // TODO(tdaede): this should not be exposed to the API
   priv->cfg.allow_lowbitdepth = !FORCE_HIGHBITDEPTH_DECODING;
   if (ctx->config.dec) {
     priv->cfg = *ctx->config.dec;
     ctx->config.dec = &priv->cfg;
   }
   priv->num_grain_image_frame_buffers = 0;
   // Turn row_mt on by default.
   priv->row_mt = 1;

   // Turn on normal tile coding mode by default.
   // 0 is for normal tile coding mode, and 1 is for large scale tile coding
   // mode(refer to lightfield example).
   priv->tile_mode = 0;
   priv->decode_tile_row = -1;
   priv->decode_tile_col = -1;
 }

 return AOM_CODEC_OK;
}

static aom_codec_err_t decoder_destroy(aom_codec_alg_priv_t *ctx) {
 if (ctx->frame_worker != NULL) {
   AVxWorker *const worker = ctx->frame_worker;
   aom_get_worker_interface()->end(worker);
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   if (frame_worker_data != NULL && frame_worker_data->pbi != NULL) {
     AV1Decoder *const pbi = frame_worker_data->pbi;
     aom_free(pbi->common.tpl_mvs);
     pbi->common.tpl_mvs = NULL;
     av1_remove_common(&pbi->common);
     av1_free_cdef_buffers(&pbi->common, &pbi->cdef_worker, &pbi->cdef_sync);
     av1_free_cdef_sync(&pbi->cdef_sync);
     av1_free_restoration_buffers(&pbi->common);
     av1_decoder_remove(pbi);
   }
   aom_free(frame_worker_data);
 }

 if (ctx->buffer_pool) {
   for (size_t i = 0; i < ctx->num_grain_image_frame_buffers; i++) {
     ctx->buffer_pool->release_fb_cb(ctx->buffer_pool->cb_priv,
                                     &ctx->grain_image_frame_buffers[i]);
   }
   av1_free_ref_frame_buffers(ctx->buffer_pool);
   av1_free_internal_frame_buffers(&ctx->buffer_pool->int_frame_buffers);
#if CONFIG_MULTITHREAD
   pthread_mutex_destroy(&ctx->buffer_pool->pool_mutex);
#endif
 }

 aom_free(ctx->frame_worker);
 aom_free(ctx->buffer_pool);
 assert(!ctx->img.self_allocd);
 aom_img_free(&ctx->img);
 aom_free(ctx);
 return AOM_CODEC_OK;
}

static aom_codec_err_t parse_timing_info(struct aom_read_bit_buffer *rb) {
 const uint32_t num_units_in_display_tick =
     aom_rb_read_unsigned_literal(rb, 32);
 const uint32_t time_scale = aom_rb_read_unsigned_literal(rb, 32);
 if (num_units_in_display_tick == 0 || time_scale == 0)
   return AOM_CODEC_UNSUP_BITSTREAM;
 const uint8_t equal_picture_interval = aom_rb_read_bit(rb);
 if (equal_picture_interval) {
   const uint32_t num_ticks_per_picture_minus_1 = aom_rb_read_uvlc(rb);
   if (num_ticks_per_picture_minus_1 == UINT32_MAX) {
     // num_ticks_per_picture_minus_1 cannot be (1 << 32) - 1.
     return AOM_CODEC_UNSUP_BITSTREAM;
   }
 }
 return AOM_CODEC_OK;
}

static aom_codec_err_t parse_decoder_model_info(
   struct aom_read_bit_buffer *rb, int *buffer_delay_length_minus_1) {
 *buffer_delay_length_minus_1 = aom_rb_read_literal(rb, 5);
 const uint32_t num_units_in_decoding_tick =
     aom_rb_read_unsigned_literal(rb, 32);
 const uint8_t buffer_removal_time_length_minus_1 = aom_rb_read_literal(rb, 5);
 const uint8_t frame_presentation_time_length_minus_1 =
     aom_rb_read_literal(rb, 5);
 (void)num_units_in_decoding_tick;
 (void)buffer_removal_time_length_minus_1;
 (void)frame_presentation_time_length_minus_1;
 return AOM_CODEC_OK;
}

static aom_codec_err_t parse_op_parameters_info(
   struct aom_read_bit_buffer *rb, int buffer_delay_length_minus_1) {
 const int n = buffer_delay_length_minus_1 + 1;
 const uint32_t decoder_buffer_delay = aom_rb_read_unsigned_literal(rb, n);
 const uint32_t encoder_buffer_delay = aom_rb_read_unsigned_literal(rb, n);
 const uint8_t low_delay_mode_flag = aom_rb_read_bit(rb);
 (void)decoder_buffer_delay;
 (void)encoder_buffer_delay;
 (void)low_delay_mode_flag;
 return AOM_CODEC_OK;
}

// Parses the operating points (including operating_point_idc, seq_level_idx,
// and seq_tier) and then sets si->number_spatial_layers and
// si->number_temporal_layers based on operating_point_idc[0].
static aom_codec_err_t parse_operating_points(struct aom_read_bit_buffer *rb,
                                             int is_reduced_header,
                                             aom_codec_stream_info_t *si) {
 int operating_point_idc0 = 0;
 if (is_reduced_header) {
   aom_rb_read_literal(rb, LEVEL_BITS);  // level
 } else {
   uint8_t decoder_model_info_present_flag = 0;
   int buffer_delay_length_minus_1 = 0;
   aom_codec_err_t status;
   const uint8_t timing_info_present_flag = aom_rb_read_bit(rb);
   if (timing_info_present_flag) {
     if ((status = parse_timing_info(rb)) != AOM_CODEC_OK) return status;
     decoder_model_info_present_flag = aom_rb_read_bit(rb);
     if (decoder_model_info_present_flag) {
       if ((status = parse_decoder_model_info(
                rb, &buffer_delay_length_minus_1)) != AOM_CODEC_OK)
         return status;
     }
   }
   const uint8_t initial_display_delay_present_flag = aom_rb_read_bit(rb);
   const uint8_t operating_points_cnt_minus_1 =
       aom_rb_read_literal(rb, OP_POINTS_CNT_MINUS_1_BITS);
   for (int i = 0; i < operating_points_cnt_minus_1 + 1; i++) {
     int operating_point_idc;
     operating_point_idc = aom_rb_read_literal(rb, OP_POINTS_IDC_BITS);
     if (i == 0) operating_point_idc0 = operating_point_idc;
     int seq_level_idx = aom_rb_read_literal(rb, LEVEL_BITS);  // level
     if (seq_level_idx > 7) aom_rb_read_bit(rb);               // tier
     if (decoder_model_info_present_flag) {
       const uint8_t decoder_model_present_for_this_op = aom_rb_read_bit(rb);
       if (decoder_model_present_for_this_op) {
         if ((status = parse_op_parameters_info(
                  rb, buffer_delay_length_minus_1)) != AOM_CODEC_OK)
           return status;
       }
     }
     if (initial_display_delay_present_flag) {
       const uint8_t initial_display_delay_present_for_this_op =
           aom_rb_read_bit(rb);
       if (initial_display_delay_present_for_this_op)
         aom_rb_read_literal(rb, 4);  // initial_display_delay_minus_1
     }
   }
 }

 if (aom_get_num_layers_from_operating_point_idc(
         operating_point_idc0, &si->number_spatial_layers,
         &si->number_temporal_layers) != AOM_CODEC_OK) {
   return AOM_CODEC_ERROR;
 }

 return AOM_CODEC_OK;
}

static aom_codec_err_t decoder_peek_si_internal(const uint8_t *data,
                                               size_t data_sz,
                                               aom_codec_stream_info_t *si,
                                               int *is_intra_only) {
 int intra_only_flag = 0;
 int got_sequence_header = 0;
 int found_keyframe = 0;

 if (data + data_sz <= data || data_sz < 1) return AOM_CODEC_INVALID_PARAM;

 si->w = 0;
 si->h = 0;
 si->is_kf = 0;  // is_kf indicates whether the current packet contains a RAP

 ObuHeader obu_header;
 memset(&obu_header, 0, sizeof(obu_header));
 size_t payload_size = 0;
 size_t bytes_read = 0;
 uint8_t reduced_still_picture_hdr = 0;
 aom_codec_err_t status = aom_read_obu_header_and_size(
     data, data_sz, si->is_annexb, &obu_header, &payload_size, &bytes_read);
 if (status != AOM_CODEC_OK) return status;

 // If the first OBU is a temporal delimiter, skip over it and look at the next
 // OBU in the bitstream
 if (obu_header.type == OBU_TEMPORAL_DELIMITER) {
   // Skip any associated payload (there shouldn't be one, but just in case)
   if (data_sz < bytes_read + payload_size) return AOM_CODEC_CORRUPT_FRAME;
   data += bytes_read + payload_size;
   data_sz -= bytes_read + payload_size;

   status = aom_read_obu_header_and_size(
       data, data_sz, si->is_annexb, &obu_header, &payload_size, &bytes_read);
   if (status != AOM_CODEC_OK) return status;
 }
 while (1) {
   data += bytes_read;
   data_sz -= bytes_read;
   if (data_sz < payload_size) return AOM_CODEC_CORRUPT_FRAME;
   // Check that the selected OBU is a sequence header
   if (obu_header.type == OBU_SEQUENCE_HEADER) {
     // Sanity check on sequence header size
     if (data_sz < 2) return AOM_CODEC_CORRUPT_FRAME;
     // Read a few values from the sequence header payload
     struct aom_read_bit_buffer rb = { data, data + data_sz, 0, NULL, NULL };

     av1_read_profile(&rb);  // profile
     const uint8_t still_picture = aom_rb_read_bit(&rb);
     reduced_still_picture_hdr = aom_rb_read_bit(&rb);

     if (!still_picture && reduced_still_picture_hdr) {
       return AOM_CODEC_UNSUP_BITSTREAM;
     }

     status = parse_operating_points(&rb, reduced_still_picture_hdr, si);
     if (status != AOM_CODEC_OK) return status;

     int num_bits_width = aom_rb_read_literal(&rb, 4) + 1;
     int num_bits_height = aom_rb_read_literal(&rb, 4) + 1;
     int max_frame_width = aom_rb_read_literal(&rb, num_bits_width) + 1;
     int max_frame_height = aom_rb_read_literal(&rb, num_bits_height) + 1;
     si->w = max_frame_width;
     si->h = max_frame_height;
     got_sequence_header = 1;
   } else if (obu_header.type == OBU_FRAME_HEADER ||
              obu_header.type == OBU_FRAME) {
     if (got_sequence_header && reduced_still_picture_hdr) {
       found_keyframe = 1;
       break;
     } else {
       // make sure we have enough bits to get the frame type out
       if (data_sz < 1) return AOM_CODEC_CORRUPT_FRAME;
       struct aom_read_bit_buffer rb = { data, data + data_sz, 0, NULL, NULL };
       const int show_existing_frame = aom_rb_read_bit(&rb);
       if (!show_existing_frame) {
         const FRAME_TYPE frame_type = (FRAME_TYPE)aom_rb_read_literal(&rb, 2);
         if (frame_type == KEY_FRAME) {
           found_keyframe = 1;
           break;  // Stop here as no further OBUs will change the outcome.
         } else if (frame_type == INTRA_ONLY_FRAME) {
           intra_only_flag = 1;
         }
       }
     }
   }
   // skip past any unread OBU header data
   data += payload_size;
   data_sz -= payload_size;
   if (data_sz == 0) break;  // exit if we're out of OBUs
   status = aom_read_obu_header_and_size(
       data, data_sz, si->is_annexb, &obu_header, &payload_size, &bytes_read);
   if (status != AOM_CODEC_OK) return status;
 }
 if (got_sequence_header && found_keyframe) si->is_kf = 1;
 if (is_intra_only != NULL) *is_intra_only = intra_only_flag;
 return AOM_CODEC_OK;
}

static aom_codec_err_t decoder_peek_si(const uint8_t *data, size_t data_sz,
                                      aom_codec_stream_info_t *si) {
 return decoder_peek_si_internal(data, data_sz, si, NULL);
}

static aom_codec_err_t decoder_get_si(aom_codec_alg_priv_t *ctx,
                                     aom_codec_stream_info_t *si) {
 *si = ctx->si;

 return AOM_CODEC_OK;
}

static void set_error_detail(aom_codec_alg_priv_t *ctx,
                            const char *const error) {
 ctx->base.err_detail = error;
}

static aom_codec_err_t update_error_state(
   aom_codec_alg_priv_t *ctx, const struct aom_internal_error_info *error) {
 if (error->error_code)
   set_error_detail(ctx, error->has_detail ? error->detail : NULL);

 return error->error_code;
}

static void init_buffer_callbacks(aom_codec_alg_priv_t *ctx) {
 AVxWorker *const worker = ctx->frame_worker;
 FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
 AV1Decoder *const pbi = frame_worker_data->pbi;
 AV1_COMMON *const cm = &pbi->common;
 BufferPool *const pool = cm->buffer_pool;

 cm->cur_frame = NULL;
 cm->features.byte_alignment = ctx->byte_alignment;
 pbi->skip_loop_filter = ctx->skip_loop_filter;
 pbi->skip_film_grain = ctx->skip_film_grain;

 if (ctx->get_ext_fb_cb != NULL && ctx->release_ext_fb_cb != NULL) {
   pool->get_fb_cb = ctx->get_ext_fb_cb;
   pool->release_fb_cb = ctx->release_ext_fb_cb;
   pool->cb_priv = ctx->ext_priv;
 } else {
   pool->get_fb_cb = av1_get_frame_buffer;
   pool->release_fb_cb = av1_release_frame_buffer;

   if (av1_alloc_internal_frame_buffers(&pool->int_frame_buffers))
     aom_internal_error(&pbi->error, AOM_CODEC_MEM_ERROR,
                        "Failed to initialize internal frame buffers");

   pool->cb_priv = &pool->int_frame_buffers;
 }
}

static int frame_worker_hook(void *arg1, void *arg2) {
 FrameWorkerData *const frame_worker_data = (FrameWorkerData *)arg1;
 const uint8_t *data = frame_worker_data->data;
 (void)arg2;

 int result = av1_receive_compressed_data(frame_worker_data->pbi,
                                          frame_worker_data->data_size, &data);
 frame_worker_data->data_end = data;

 if (result != 0) {
   // Check decode result in serial decode.
   frame_worker_data->pbi->need_resync = 1;
 }
 return !result;
}

static aom_codec_err_t init_decoder(aom_codec_alg_priv_t *ctx) {
 const AVxWorkerInterface *const winterface = aom_get_worker_interface();

 ctx->last_show_frame = NULL;
 ctx->need_resync = 1;
 ctx->flushed = 0;

 ctx->buffer_pool = (BufferPool *)aom_calloc(1, sizeof(BufferPool));
 if (ctx->buffer_pool == NULL) return AOM_CODEC_MEM_ERROR;
 ctx->buffer_pool->num_frame_bufs = FRAME_BUFFERS;
 ctx->buffer_pool->frame_bufs = (RefCntBuffer *)aom_calloc(
     ctx->buffer_pool->num_frame_bufs, sizeof(*ctx->buffer_pool->frame_bufs));
 if (ctx->buffer_pool->frame_bufs == NULL) {
   ctx->buffer_pool->num_frame_bufs = 0;
   aom_free(ctx->buffer_pool);
   ctx->buffer_pool = NULL;
   return AOM_CODEC_MEM_ERROR;
 }

#if CONFIG_MULTITHREAD
 if (pthread_mutex_init(&ctx->buffer_pool->pool_mutex, NULL)) {
   aom_free(ctx->buffer_pool->frame_bufs);
   ctx->buffer_pool->frame_bufs = NULL;
   ctx->buffer_pool->num_frame_bufs = 0;
   aom_free(ctx->buffer_pool);
   ctx->buffer_pool = NULL;
   set_error_detail(ctx, "Failed to allocate buffer pool mutex");
   return AOM_CODEC_MEM_ERROR;
 }
#endif

 ctx->frame_worker = (AVxWorker *)aom_malloc(sizeof(*ctx->frame_worker));
 if (ctx->frame_worker == NULL) {
   set_error_detail(ctx, "Failed to allocate frame_worker");
   return AOM_CODEC_MEM_ERROR;
 }

 AVxWorker *const worker = ctx->frame_worker;
 winterface->init(worker);
 worker->thread_name = "aom frameworker";
 worker->data1 = aom_memalign(32, sizeof(FrameWorkerData));
 if (worker->data1 == NULL) {
   winterface->end(worker);
   aom_free(worker);
   ctx->frame_worker = NULL;
   set_error_detail(ctx, "Failed to allocate frame_worker_data");
   return AOM_CODEC_MEM_ERROR;
 }
 FrameWorkerData *frame_worker_data = (FrameWorkerData *)worker->data1;
 frame_worker_data->pbi = av1_decoder_create(ctx->buffer_pool);
 if (frame_worker_data->pbi == NULL) {
   winterface->end(worker);
   aom_free(frame_worker_data);
   aom_free(worker);
   ctx->frame_worker = NULL;
   set_error_detail(ctx, "Failed to allocate frame_worker_data->pbi");
   return AOM_CODEC_MEM_ERROR;
 }
 frame_worker_data->frame_context_ready = 0;
 frame_worker_data->received_frame = 0;
 frame_worker_data->pbi->allow_lowbitdepth = ctx->cfg.allow_lowbitdepth;

 // If decoding in serial mode, FrameWorker thread could create tile worker
 // thread or loopfilter thread.
 frame_worker_data->pbi->max_threads = ctx->cfg.threads;
 frame_worker_data->pbi->inv_tile_order = ctx->invert_tile_order;
 frame_worker_data->pbi->common.tiles.large_scale = ctx->tile_mode;
 frame_worker_data->pbi->is_annexb = ctx->is_annexb;
 frame_worker_data->pbi->dec_tile_row = ctx->decode_tile_row;
 frame_worker_data->pbi->dec_tile_col = ctx->decode_tile_col;
 frame_worker_data->pbi->operating_point = ctx->operating_point;
 frame_worker_data->pbi->output_all_layers = ctx->output_all_layers;
 frame_worker_data->pbi->ext_tile_debug = ctx->ext_tile_debug;
 frame_worker_data->pbi->row_mt = ctx->row_mt;
 frame_worker_data->pbi->is_fwd_kf_present = 0;
 frame_worker_data->pbi->is_arf_frame_present = 0;
 worker->hook = frame_worker_hook;

 init_buffer_callbacks(ctx);

 return AOM_CODEC_OK;
}

static inline void check_resync(aom_codec_alg_priv_t *const ctx,
                               const AV1Decoder *const pbi) {
 // Clear resync flag if worker got a key frame or intra only frame.
 if (ctx->need_resync == 1 && pbi->need_resync == 0 &&
     frame_is_intra_only(&pbi->common))
   ctx->need_resync = 0;
}

static aom_codec_err_t decode_one(aom_codec_alg_priv_t *ctx,
                                 const uint8_t **data, size_t data_sz,
                                 void *user_priv) {
 const AVxWorkerInterface *const winterface = aom_get_worker_interface();

 // Determine the stream parameters. Note that we rely on peek_si to
 // validate that we have a buffer that does not wrap around the top
 // of the heap.
 if (!ctx->si.h) {
   int is_intra_only = 0;
   ctx->si.is_annexb = ctx->is_annexb;
   const aom_codec_err_t res =
       decoder_peek_si_internal(*data, data_sz, &ctx->si, &is_intra_only);
   if (res != AOM_CODEC_OK) return res;

   if (!ctx->si.is_kf && !is_intra_only) return AOM_CODEC_ERROR;
 }

 AVxWorker *const worker = ctx->frame_worker;
 FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
 frame_worker_data->data = *data;
 frame_worker_data->data_size = data_sz;
 frame_worker_data->user_priv = user_priv;
 frame_worker_data->received_frame = 1;

 frame_worker_data->pbi->common.tiles.large_scale = ctx->tile_mode;
 frame_worker_data->pbi->dec_tile_row = ctx->decode_tile_row;
 frame_worker_data->pbi->dec_tile_col = ctx->decode_tile_col;
 frame_worker_data->pbi->ext_tile_debug = ctx->ext_tile_debug;
 frame_worker_data->pbi->row_mt = ctx->row_mt;
 frame_worker_data->pbi->ext_refs = ctx->ext_refs;

 frame_worker_data->pbi->is_annexb = ctx->is_annexb;

 worker->had_error = 0;
 winterface->execute(worker);

 // Update data pointer after decode.
 *data = frame_worker_data->data_end;

 if (worker->had_error)
   return update_error_state(ctx, &frame_worker_data->pbi->error);

 check_resync(ctx, frame_worker_data->pbi);

 return AOM_CODEC_OK;
}

static void release_pending_output_frames(aom_codec_alg_priv_t *ctx) {
 // Release any pending output frames from the previous decoder_decode or
 // decoder_inspect call. We need to do this even if the decoder is being
 // flushed or the input arguments are invalid.
 if (ctx->frame_worker) {
   BufferPool *const pool = ctx->buffer_pool;
   lock_buffer_pool(pool);
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   struct AV1Decoder *pbi = frame_worker_data->pbi;
   for (size_t j = 0; j < pbi->num_output_frames; j++) {
     decrease_ref_count(pbi->output_frames[j], pool);
   }
   pbi->num_output_frames = 0;
   unlock_buffer_pool(pool);
   for (size_t j = 0; j < ctx->num_grain_image_frame_buffers; j++) {
     pool->release_fb_cb(pool->cb_priv, &ctx->grain_image_frame_buffers[j]);
     ctx->grain_image_frame_buffers[j].data = NULL;
     ctx->grain_image_frame_buffers[j].size = 0;
     ctx->grain_image_frame_buffers[j].priv = NULL;
   }
   ctx->num_grain_image_frame_buffers = 0;
 }
}

// This function enables the inspector to inspect non visible frames.
static aom_codec_err_t decoder_inspect(aom_codec_alg_priv_t *ctx,
                                      const uint8_t *data, size_t data_sz,
                                      void *user_priv) {
 aom_codec_err_t res = AOM_CODEC_OK;

 release_pending_output_frames(ctx);

 /* Sanity checks */
 /* NULL data ptr allowed if data_sz is 0 too */
 if (data == NULL && data_sz == 0) {
   ctx->flushed = 1;
   return AOM_CODEC_OK;
 }
 if (data == NULL || data_sz == 0) return AOM_CODEC_INVALID_PARAM;

 // Reset flushed when receiving a valid frame.
 ctx->flushed = 0;

 const uint8_t *data_start = data;
 const uint8_t *data_end = data + data_sz;

 uint64_t frame_size;
 if (ctx->is_annexb) {
   // read the size of this temporal unit
   size_t length_of_size;
   uint64_t temporal_unit_size;
   if (aom_uleb_decode(data_start, data_sz, &temporal_unit_size,
                       &length_of_size) != 0) {
     return AOM_CODEC_CORRUPT_FRAME;
   }
   data_start += length_of_size;
   if (temporal_unit_size > (size_t)(data_end - data_start))
     return AOM_CODEC_CORRUPT_FRAME;
   data_end = data_start + temporal_unit_size;

   // read the size of this frame unit
   if (aom_uleb_decode(data_start, (size_t)(data_end - data_start),
                       &frame_size, &length_of_size) != 0) {
     return AOM_CODEC_CORRUPT_FRAME;
   }
   data_start += length_of_size;
   if (frame_size > (size_t)(data_end - data_start))
     return AOM_CODEC_CORRUPT_FRAME;
 } else {
   frame_size = (uint64_t)(data_end - data_start);
 }

 if (ctx->frame_worker == NULL) {
   res = init_decoder(ctx);
   if (res != AOM_CODEC_OK) return res;
 }
 FrameWorkerData *const frame_worker_data =
     (FrameWorkerData *)ctx->frame_worker->data1;
 AV1Decoder *const pbi = frame_worker_data->pbi;
 AV1_COMMON *const cm = &pbi->common;
#if CONFIG_INSPECTION
 frame_worker_data->pbi->inspect_cb = ctx->inspect_cb;
 frame_worker_data->pbi->inspect_ctx = ctx->inspect_ctx;
#endif
 res = av1_receive_compressed_data(frame_worker_data->pbi, (size_t)frame_size,
                                   &data_start);
 check_resync(ctx, frame_worker_data->pbi);

 if (ctx->frame_worker->had_error)
   return update_error_state(ctx, &frame_worker_data->pbi->error);

 // Allow extra zero bytes after the frame end
 while (data_start < data_end) {
   const uint8_t marker = data_start[0];
   if (marker) break;
   ++data_start;
 }

 Av1DecodeReturn *data2 = (Av1DecodeReturn *)user_priv;
 data2->idx = -1;
 if (cm->cur_frame) {
   for (int i = 0; i < REF_FRAMES; ++i)
     if (cm->ref_frame_map[i] == cm->cur_frame) data2->idx = i;
 }
 data2->buf = data_start;
 data2->show_existing = cm->show_existing_frame;
 return res;
}

static aom_codec_err_t decoder_decode(aom_codec_alg_priv_t *ctx,
                                     const uint8_t *data, size_t data_sz,
                                     void *user_priv) {
 aom_codec_err_t res = AOM_CODEC_OK;

#if CONFIG_INSPECTION
 if (user_priv != 0) {
   return decoder_inspect(ctx, data, data_sz, user_priv);
 }
#endif

 release_pending_output_frames(ctx);

 /* Sanity checks */
 /* NULL data ptr allowed if data_sz is 0 too */
 if (data == NULL && data_sz == 0) {
   ctx->flushed = 1;
   return AOM_CODEC_OK;
 }
 if (data == NULL || data_sz == 0) return AOM_CODEC_INVALID_PARAM;

 // Reset flushed when receiving a valid frame.
 ctx->flushed = 0;

 // Initialize the decoder worker on the first frame.
 if (ctx->frame_worker == NULL) {
   res = init_decoder(ctx);
   if (res != AOM_CODEC_OK) return res;
 }

 const uint8_t *data_start = data;
 const uint8_t *data_end = data + data_sz;

 if (ctx->is_annexb) {
   // read the size of this temporal unit
   size_t length_of_size;
   uint64_t temporal_unit_size;
   if (aom_uleb_decode(data_start, data_sz, &temporal_unit_size,
                       &length_of_size) != 0) {
     return AOM_CODEC_CORRUPT_FRAME;
   }
   data_start += length_of_size;
   if (temporal_unit_size > (size_t)(data_end - data_start))
     return AOM_CODEC_CORRUPT_FRAME;
   data_end = data_start + temporal_unit_size;
 }

 // Decode in serial mode.
 while (data_start < data_end) {
   uint64_t frame_size;
   if (ctx->is_annexb) {
     // read the size of this frame unit
     size_t length_of_size;
     if (aom_uleb_decode(data_start, (size_t)(data_end - data_start),
                         &frame_size, &length_of_size) != 0) {
       return AOM_CODEC_CORRUPT_FRAME;
     }
     data_start += length_of_size;
     if (frame_size > (size_t)(data_end - data_start))
       return AOM_CODEC_CORRUPT_FRAME;
   } else {
     frame_size = (uint64_t)(data_end - data_start);
   }

   res = decode_one(ctx, &data_start, (size_t)frame_size, user_priv);
   if (res != AOM_CODEC_OK) return res;

   // Allow extra zero bytes after the frame end
   while (data_start < data_end) {
     const uint8_t marker = data_start[0];
     if (marker) break;
     ++data_start;
   }
 }

 return res;
}

typedef struct {
 BufferPool *pool;
 aom_codec_frame_buffer_t *fb;
} AllocCbParam;

static void *AllocWithGetFrameBufferCb(void *priv, size_t size) {
 AllocCbParam *param = (AllocCbParam *)priv;
 if (param->pool->get_fb_cb(param->pool->cb_priv, size, param->fb) < 0)
   return NULL;
 if (param->fb->data == NULL || param->fb->size < size) return NULL;
 return param->fb->data;
}

// If grain_params->apply_grain is false, returns img. Otherwise, adds film
// grain to img, saves the result in grain_img, and returns grain_img.
static aom_image_t *add_grain_if_needed(aom_codec_alg_priv_t *ctx,
                                       aom_image_t *img,
                                       aom_image_t *grain_img,
                                       aom_film_grain_t *grain_params) {
 if (!grain_params->apply_grain) return img;

 const int w_even = ALIGN_POWER_OF_TWO_UNSIGNED(img->d_w, 1);
 const int h_even = ALIGN_POWER_OF_TWO_UNSIGNED(img->d_h, 1);

 BufferPool *const pool = ctx->buffer_pool;
 aom_codec_frame_buffer_t *fb =
     &ctx->grain_image_frame_buffers[ctx->num_grain_image_frame_buffers];
 AllocCbParam param;
 param.pool = pool;
 param.fb = fb;
 if (!aom_img_alloc_with_cb(grain_img, img->fmt, w_even, h_even, 16,
                            AllocWithGetFrameBufferCb, &param)) {
   return NULL;
 }

 grain_img->user_priv = img->user_priv;
 grain_img->fb_priv = fb->priv;
 if (av1_add_film_grain(grain_params, img, grain_img)) {
   pool->release_fb_cb(pool->cb_priv, fb);
   return NULL;
 }

 ctx->num_grain_image_frame_buffers++;
 return grain_img;
}

// Copies and clears the metadata from AV1Decoder.
static void move_decoder_metadata_to_img(AV1Decoder *pbi, aom_image_t *img) {
 if (pbi->metadata && img) {
   assert(!img->metadata);
   img->metadata = pbi->metadata;
   pbi->metadata = NULL;
 }
}

static aom_image_t *decoder_get_frame(aom_codec_alg_priv_t *ctx,
                                     aom_codec_iter_t *iter) {
 aom_image_t *img = NULL;

 if (!iter) {
   return NULL;
 }

 // To avoid having to allocate any extra storage, treat 'iter' as
 // simply a pointer to an integer index
 uintptr_t *index = (uintptr_t *)iter;

 if (ctx->frame_worker == NULL) {
   return NULL;
 }
 const AVxWorkerInterface *const winterface = aom_get_worker_interface();
 AVxWorker *const worker = ctx->frame_worker;
 FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
 AV1Decoder *const pbi = frame_worker_data->pbi;
 pbi->error.error_code = AOM_CODEC_OK;
 pbi->error.has_detail = 0;
 AV1_COMMON *const cm = &pbi->common;
 CommonTileParams *const tiles = &cm->tiles;
 // Wait for the frame from worker thread.
 if (!winterface->sync(worker)) {
   // Decoding failed. Release the worker thread.
   frame_worker_data->received_frame = 0;
   ctx->need_resync = 1;
   // TODO(aomedia:3519): Set an error code. Check if a different error code
   // should be used if ctx->flushed != 1.
   return NULL;
 }
 // Check if worker has received any frames.
 if (frame_worker_data->received_frame == 1) {
   frame_worker_data->received_frame = 0;
   check_resync(ctx, frame_worker_data->pbi);
 }
 YV12_BUFFER_CONFIG *sd;
 aom_film_grain_t *grain_params;
 if (av1_get_raw_frame(frame_worker_data->pbi, *index, &sd, &grain_params) !=
     0) {
   return NULL;
 }
 RefCntBuffer *const output_frame_buf = pbi->output_frames[*index];
 ctx->last_show_frame = output_frame_buf;
 if (ctx->need_resync) return NULL;
 aom_img_remove_metadata(&ctx->img);
 yuvconfig2image(&ctx->img, sd, frame_worker_data->user_priv);
 move_decoder_metadata_to_img(pbi, &ctx->img);

 if (!pbi->ext_tile_debug && tiles->large_scale) {
   *index += 1;  // Advance the iterator to point to the next image
   aom_img_remove_metadata(&ctx->img);
   yuvconfig2image(&ctx->img, &pbi->tile_list_outbuf, NULL);
   move_decoder_metadata_to_img(pbi, &ctx->img);
   img = &ctx->img;
   return img;
 }

 const int num_planes = av1_num_planes(cm);
 if (pbi->ext_tile_debug && tiles->single_tile_decoding &&
     pbi->dec_tile_row >= 0) {
   int tile_width, tile_height;
   if (!av1_get_uniform_tile_size(cm, &tile_width, &tile_height)) {
     return NULL;
   }
   const int tile_row = AOMMIN(pbi->dec_tile_row, tiles->rows - 1);
   const int mi_row = tile_row * tile_height;
   const int ssy = ctx->img.y_chroma_shift;
   int plane;
   ctx->img.planes[0] += mi_row * MI_SIZE * ctx->img.stride[0];
   if (num_planes > 1) {
     for (plane = 1; plane < MAX_MB_PLANE; ++plane) {
       ctx->img.planes[plane] +=
           mi_row * (MI_SIZE >> ssy) * ctx->img.stride[plane];
     }
   }
   ctx->img.d_h =
       AOMMIN(tile_height, cm->mi_params.mi_rows - mi_row) * MI_SIZE;
 }

 if (pbi->ext_tile_debug && tiles->single_tile_decoding &&
     pbi->dec_tile_col >= 0) {
   int tile_width, tile_height;
   if (!av1_get_uniform_tile_size(cm, &tile_width, &tile_height)) {
     return NULL;
   }
   const int tile_col = AOMMIN(pbi->dec_tile_col, tiles->cols - 1);
   const int mi_col = tile_col * tile_width;
   const int ssx = ctx->img.x_chroma_shift;
   const int is_hbd = (ctx->img.fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 1 : 0;
   int plane;
   ctx->img.planes[0] += mi_col * MI_SIZE * (1 + is_hbd);
   if (num_planes > 1) {
     for (plane = 1; plane < MAX_MB_PLANE; ++plane) {
       ctx->img.planes[plane] += mi_col * (MI_SIZE >> ssx) * (1 + is_hbd);
     }
   }
   ctx->img.d_w = AOMMIN(tile_width, cm->mi_params.mi_cols - mi_col) * MI_SIZE;
 }

 ctx->img.fb_priv = output_frame_buf->raw_frame_buffer.priv;
 img = &ctx->img;
 img->temporal_id = output_frame_buf->temporal_id;
 img->spatial_id = output_frame_buf->spatial_id;
 if (pbi->skip_film_grain) grain_params->apply_grain = 0;
 aom_image_t *res =
     add_grain_if_needed(ctx, img, &ctx->image_with_grain, grain_params);
 if (!res) {
   pbi->error.error_code = AOM_CODEC_CORRUPT_FRAME;
   pbi->error.has_detail = 1;
   snprintf(pbi->error.detail, sizeof(pbi->error.detail),
            "Grain synthesis failed\n");
   return res;
 }
 *index += 1;  // Advance the iterator to point to the next image
 return res;
}

static aom_codec_err_t decoder_set_fb_fn(
   aom_codec_alg_priv_t *ctx, aom_get_frame_buffer_cb_fn_t cb_get,
   aom_release_frame_buffer_cb_fn_t cb_release, void *cb_priv) {
 if (cb_get == NULL || cb_release == NULL) {
   return AOM_CODEC_INVALID_PARAM;
 }
 if (ctx->frame_worker != NULL) {
   // If the decoder has already been initialized, do not accept changes to
   // the frame buffer functions.
   return AOM_CODEC_ERROR;
 }

 ctx->get_ext_fb_cb = cb_get;
 ctx->release_ext_fb_cb = cb_release;
 ctx->ext_priv = cb_priv;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_reference(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 av1_ref_frame_t *const data = va_arg(args, av1_ref_frame_t *);

 if (data) {
   av1_ref_frame_t *const frame = data;
   YV12_BUFFER_CONFIG sd;
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   image2yuvconfig(&frame->img, &sd);
   return av1_set_reference_dec(&frame_worker_data->pbi->common, frame->idx,
                                frame->use_external_ref, &sd);
 } else {
   return AOM_CODEC_INVALID_PARAM;
 }
}

static aom_codec_err_t ctrl_copy_reference(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 const av1_ref_frame_t *const frame = va_arg(args, av1_ref_frame_t *);
 if (frame) {
   YV12_BUFFER_CONFIG sd;
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   image2yuvconfig(&frame->img, &sd);
   return av1_copy_reference_dec(frame_worker_data->pbi, frame->idx, &sd);
 } else {
   return AOM_CODEC_INVALID_PARAM;
 }
}

static aom_codec_err_t ctrl_get_reference(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 av1_ref_frame_t *data = va_arg(args, av1_ref_frame_t *);
 if (data) {
   YV12_BUFFER_CONFIG *fb;
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   fb = get_ref_frame(&frame_worker_data->pbi->common, data->idx);
   if (fb == NULL) return AOM_CODEC_ERROR;
   yuvconfig2image(&data->img, fb, NULL);
   return AOM_CODEC_OK;
 } else {
   return AOM_CODEC_INVALID_PARAM;
 }
}

static aom_codec_err_t ctrl_get_new_frame_image(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 aom_image_t *new_img = va_arg(args, aom_image_t *);
 if (new_img) {
   YV12_BUFFER_CONFIG new_frame;
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;

   if (av1_get_frame_to_show(frame_worker_data->pbi, &new_frame) == 0) {
     yuvconfig2image(new_img, &new_frame, NULL);
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 } else {
   return AOM_CODEC_INVALID_PARAM;
 }
}

static aom_codec_err_t ctrl_copy_new_frame_image(aom_codec_alg_priv_t *ctx,
                                                va_list args) {
 aom_image_t *img = va_arg(args, aom_image_t *);
 if (img) {
   YV12_BUFFER_CONFIG new_frame;
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;

   if (av1_get_frame_to_show(frame_worker_data->pbi, &new_frame) == 0) {
     YV12_BUFFER_CONFIG sd;
     image2yuvconfig(img, &sd);
     return av1_copy_new_frame_dec(&frame_worker_data->pbi->common, &new_frame,
                                   &sd);
   } else {
     return AOM_CODEC_ERROR;
   }
 } else {
   return AOM_CODEC_INVALID_PARAM;
 }
}

static aom_codec_err_t ctrl_get_last_ref_updates(aom_codec_alg_priv_t *ctx,
                                                va_list args) {
 int *const update_info = va_arg(args, int *);

 if (update_info) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     *update_info =
         frame_worker_data->pbi->common.current_frame.refresh_frame_flags;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_last_quantizer(aom_codec_alg_priv_t *ctx,
                                              va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 *arg = ((FrameWorkerData *)ctx->frame_worker->data1)
            ->pbi->common.quant_params.base_qindex;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_fwd_kf_value(aom_codec_alg_priv_t *ctx,
                                            va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 *arg = ((FrameWorkerData *)ctx->frame_worker->data1)->pbi->is_fwd_kf_present;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_altref_present(aom_codec_alg_priv_t *ctx,
                                              va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 *arg =
     ((FrameWorkerData *)ctx->frame_worker->data1)->pbi->is_arf_frame_present;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_frame_flags(aom_codec_alg_priv_t *ctx,
                                           va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 AV1Decoder *pbi = ((FrameWorkerData *)ctx->frame_worker->data1)->pbi;
 *arg = 0;
 switch (pbi->common.current_frame.frame_type) {
   case KEY_FRAME:
     *arg |= AOM_FRAME_IS_KEY;
     *arg |= AOM_FRAME_IS_INTRAONLY;
     if (!pbi->common.show_frame) {
       *arg |= AOM_FRAME_IS_DELAYED_RANDOM_ACCESS_POINT;
     }
     break;
   case INTRA_ONLY_FRAME: *arg |= AOM_FRAME_IS_INTRAONLY; break;
   case S_FRAME: *arg |= AOM_FRAME_IS_SWITCH; break;
 }
 if (pbi->common.features.error_resilient_mode) {
   *arg |= AOM_FRAME_IS_ERROR_RESILIENT;
 }
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_tile_info(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 aom_tile_info *const tile_info = va_arg(args, aom_tile_info *);

 if (tile_info) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     const CommonTileParams *tiles = &pbi->common.tiles;

     int tile_rows = tiles->rows;
     int tile_cols = tiles->cols;

     if (tiles->uniform_spacing) {
       tile_info->tile_rows = 1 << tiles->log2_rows;
       tile_info->tile_columns = 1 << tiles->log2_cols;
     } else {
       tile_info->tile_rows = tile_rows;
       tile_info->tile_columns = tile_cols;
     }

     for (int tile_col = 1; tile_col <= tile_cols; tile_col++) {
       tile_info->tile_widths[tile_col - 1] =
           tiles->col_start_sb[tile_col] - tiles->col_start_sb[tile_col - 1];
     }

     for (int tile_row = 1; tile_row <= tile_rows; tile_row++) {
       tile_info->tile_heights[tile_row - 1] =
           tiles->row_start_sb[tile_row] - tiles->row_start_sb[tile_row - 1];
     }
     tile_info->num_tile_groups = pbi->num_tile_groups;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_screen_content_tools_info(
   aom_codec_alg_priv_t *ctx, va_list args) {
 aom_screen_content_tools_info *const sc_info =
     va_arg(args, aom_screen_content_tools_info *);
 if (sc_info) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     sc_info->allow_screen_content_tools =
         pbi->common.features.allow_screen_content_tools;
     sc_info->allow_intrabc = pbi->common.features.allow_intrabc;
     sc_info->force_integer_mv =
         (int)pbi->common.features.cur_frame_force_integer_mv;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }
 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_still_picture(aom_codec_alg_priv_t *ctx,
                                             va_list args) {
 aom_still_picture_info *const still_picture_info =
     va_arg(args, aom_still_picture_info *);
 if (still_picture_info) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     still_picture_info->is_still_picture = (int)pbi->seq_params.still_picture;
     still_picture_info->is_reduced_still_picture_hdr =
         (int)(pbi->seq_params.reduced_still_picture_hdr);
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }
 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_sb_size(aom_codec_alg_priv_t *ctx,
                                       va_list args) {
 aom_superblock_size_t *const sb_size = va_arg(args, aom_superblock_size_t *);
 if (sb_size) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     if (pbi->seq_params.sb_size == BLOCK_128X128) {
       *sb_size = AOM_SUPERBLOCK_SIZE_128X128;
     } else {
       *sb_size = AOM_SUPERBLOCK_SIZE_64X64;
     }
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }
 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_show_existing_frame_flag(
   aom_codec_alg_priv_t *ctx, va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 *arg = ((FrameWorkerData *)ctx->frame_worker->data1)
            ->pbi->common.show_existing_frame;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_s_frame_info(aom_codec_alg_priv_t *ctx,
                                            va_list args) {
 aom_s_frame_info *const s_frame_info = va_arg(args, aom_s_frame_info *);
 if (s_frame_info) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     s_frame_info->is_s_frame = pbi->sframe_info.is_s_frame;
     s_frame_info->is_s_frame_at_altref =
         pbi->sframe_info.is_s_frame_at_altref;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }
 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_frame_corrupted(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 int *corrupted = va_arg(args, int *);

 if (corrupted) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     AV1Decoder *const pbi = frame_worker_data->pbi;
     if (pbi->seen_frame_header && pbi->num_output_frames == 0)
       return AOM_CODEC_ERROR;
     if (ctx->last_show_frame != NULL)
       *corrupted = ctx->last_show_frame->buf.corrupted;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_frame_size(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 int *const frame_size = va_arg(args, int *);

 if (frame_size) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1_COMMON *const cm = &frame_worker_data->pbi->common;
     frame_size[0] = cm->width;
     frame_size[1] = cm->height;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_frame_header_info(aom_codec_alg_priv_t *ctx,
                                                 va_list args) {
 aom_tile_data *const frame_header_info = va_arg(args, aom_tile_data *);

 if (frame_header_info) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     frame_header_info->coded_tile_data_size = pbi->obu_size_hdr.size;
     frame_header_info->coded_tile_data = pbi->obu_size_hdr.data;
     frame_header_info->extra_size = pbi->frame_header_size;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_tile_data(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 aom_tile_data *const tile_data = va_arg(args, aom_tile_data *);

 if (tile_data) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1Decoder *pbi = frame_worker_data->pbi;
     tile_data->coded_tile_data_size =
         pbi->tile_buffers[pbi->dec_tile_row][pbi->dec_tile_col].size;
     tile_data->coded_tile_data =
         pbi->tile_buffers[pbi->dec_tile_row][pbi->dec_tile_col].data;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_set_ext_ref_ptr(aom_codec_alg_priv_t *ctx,
                                           va_list args) {
 av1_ext_ref_frame_t *const data = va_arg(args, av1_ext_ref_frame_t *);

 if (data) {
   av1_ext_ref_frame_t *const ext_frames = data;
   ctx->ext_refs.num = ext_frames->num;
   for (int i = 0; i < ctx->ext_refs.num; i++) {
     image2yuvconfig(ext_frames->img++, &ctx->ext_refs.refs[i]);
   }
   return AOM_CODEC_OK;
 } else {
   return AOM_CODEC_INVALID_PARAM;
 }
}

static aom_codec_err_t ctrl_get_render_size(aom_codec_alg_priv_t *ctx,
                                           va_list args) {
 int *const render_size = va_arg(args, int *);

 if (render_size) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1_COMMON *const cm = &frame_worker_data->pbi->common;
     render_size[0] = cm->render_width;
     render_size[1] = cm->render_height;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_bit_depth(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 unsigned int *const bit_depth = va_arg(args, unsigned int *);
 AVxWorker *const worker = ctx->frame_worker;

 if (bit_depth) {
   if (worker) {
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1_COMMON *const cm = &frame_worker_data->pbi->common;
     *bit_depth = cm->seq_params->bit_depth;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_img_fmt_t get_img_format(int subsampling_x, int subsampling_y,
                                   int use_highbitdepth) {
 aom_img_fmt_t fmt = 0;

 if (subsampling_x == 0 && subsampling_y == 0)
   fmt = AOM_IMG_FMT_I444;
 else if (subsampling_x == 1 && subsampling_y == 0)
   fmt = AOM_IMG_FMT_I422;
 else if (subsampling_x == 1 && subsampling_y == 1)
   fmt = AOM_IMG_FMT_I420;

 if (use_highbitdepth) fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
 return fmt;
}

static aom_codec_err_t ctrl_get_img_format(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 aom_img_fmt_t *const img_fmt = va_arg(args, aom_img_fmt_t *);
 AVxWorker *const worker = ctx->frame_worker;

 if (img_fmt) {
   if (worker) {
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1_COMMON *const cm = &frame_worker_data->pbi->common;

     *img_fmt = get_img_format(cm->seq_params->subsampling_x,
                               cm->seq_params->subsampling_y,
                               cm->seq_params->use_highbitdepth);
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_tile_size(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 unsigned int *const tile_size = va_arg(args, unsigned int *);
 AVxWorker *const worker = ctx->frame_worker;

 if (tile_size) {
   if (worker) {
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     const AV1_COMMON *const cm = &frame_worker_data->pbi->common;
     int tile_width, tile_height;
     if (!av1_get_uniform_tile_size(cm, &tile_width, &tile_height)) {
       return AOM_CODEC_CORRUPT_FRAME;
     }
     *tile_size = ((tile_width * MI_SIZE) << 16) + tile_height * MI_SIZE;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }
 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_tile_count(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 unsigned int *const tile_count = va_arg(args, unsigned int *);

 if (tile_count) {
   AVxWorker *const worker = ctx->frame_worker;
   if (worker) {
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     *tile_count = frame_worker_data->pbi->tile_count_minus_1 + 1;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }
 return AOM_CODEC_INVALID_PARAM;
}

static aom_codec_err_t ctrl_get_base_q_idx(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 FrameWorkerData *const frame_worker_data =
     (FrameWorkerData *)ctx->frame_worker->data1;
 *arg = frame_worker_data->pbi->common.quant_params.base_qindex;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_show_frame_flag(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 int *const arg = va_arg(args, int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 FrameWorkerData *const frame_worker_data =
     (FrameWorkerData *)ctx->frame_worker->data1;
 *arg = frame_worker_data->pbi->common.show_frame;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_order_hint(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 unsigned int *const arg = va_arg(args, unsigned int *);
 if (arg == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 FrameWorkerData *const frame_worker_data =
     (FrameWorkerData *)ctx->frame_worker->data1;
 *arg = frame_worker_data->pbi->common.current_frame.order_hint;
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_mi_info(aom_codec_alg_priv_t *ctx,
                                       va_list args) {
 int mi_row = va_arg(args, int);
 int mi_col = va_arg(args, int);
 MB_MODE_INFO *mi = va_arg(args, MB_MODE_INFO *);
 if (mi == NULL) return AOM_CODEC_INVALID_PARAM;
 if (ctx->frame_worker == NULL) return AOM_CODEC_ERROR;
 FrameWorkerData *const frame_worker_data =
     (FrameWorkerData *)ctx->frame_worker->data1;
 if (frame_worker_data == NULL) return AOM_CODEC_ERROR;

 AV1_COMMON *cm = &frame_worker_data->pbi->common;
 const int mi_rows = cm->mi_params.mi_rows;
 const int mi_cols = cm->mi_params.mi_cols;
 const int mi_stride = cm->mi_params.mi_stride;
 const int offset = mi_row * mi_stride + mi_col;

 if (mi_row < 0 || mi_row >= mi_rows || mi_col < 0 || mi_col >= mi_cols) {
   return AOM_CODEC_INVALID_PARAM;
 }

 *mi = *cm->mi_params.mi_grid_base[offset];

 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_invert_tile_order(aom_codec_alg_priv_t *ctx,
                                                 va_list args) {
 ctx->invert_tile_order = va_arg(args, int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_byte_alignment(aom_codec_alg_priv_t *ctx,
                                              va_list args) {
 const int legacy_byte_alignment = 0;
 const int min_byte_alignment = 32;
 const int max_byte_alignment = 1024;
 const int byte_alignment = va_arg(args, int);

 if (byte_alignment != legacy_byte_alignment &&
     (byte_alignment < min_byte_alignment ||
      byte_alignment > max_byte_alignment ||
      (byte_alignment & (byte_alignment - 1)) != 0))
   return AOM_CODEC_INVALID_PARAM;

 ctx->byte_alignment = byte_alignment;
 if (ctx->frame_worker) {
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   frame_worker_data->pbi->common.features.byte_alignment = byte_alignment;
 }
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_skip_loop_filter(aom_codec_alg_priv_t *ctx,
                                                va_list args) {
 ctx->skip_loop_filter = va_arg(args, int);

 if (ctx->frame_worker) {
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   frame_worker_data->pbi->skip_loop_filter = ctx->skip_loop_filter;
 }

 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_skip_film_grain(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 ctx->skip_film_grain = va_arg(args, int);

 if (ctx->frame_worker) {
   AVxWorker *const worker = ctx->frame_worker;
   FrameWorkerData *const frame_worker_data = (FrameWorkerData *)worker->data1;
   frame_worker_data->pbi->skip_film_grain = ctx->skip_film_grain;
 }

 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_get_accounting(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
#if !CONFIG_ACCOUNTING
 (void)ctx;
 (void)args;
 return AOM_CODEC_INCAPABLE;
#else
 Accounting **acct = va_arg(args, Accounting **);

 if (acct) {
   if (ctx->frame_worker) {
     AVxWorker *const worker = ctx->frame_worker;
     FrameWorkerData *const frame_worker_data =
         (FrameWorkerData *)worker->data1;
     AV1Decoder *pbi = frame_worker_data->pbi;
     *acct = &pbi->accounting;
     return AOM_CODEC_OK;
   } else {
     return AOM_CODEC_ERROR;
   }
 }

 return AOM_CODEC_INVALID_PARAM;
#endif
}

static aom_codec_err_t ctrl_set_decode_tile_row(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 ctx->decode_tile_row = va_arg(args, int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_decode_tile_col(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 ctx->decode_tile_col = va_arg(args, int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_tile_mode(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 ctx->tile_mode = va_arg(args, unsigned int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_is_annexb(aom_codec_alg_priv_t *ctx,
                                         va_list args) {
 ctx->is_annexb = va_arg(args, unsigned int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_operating_point(aom_codec_alg_priv_t *ctx,
                                               va_list args) {
 ctx->operating_point = va_arg(args, int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_output_all_layers(aom_codec_alg_priv_t *ctx,
                                                 va_list args) {
 ctx->output_all_layers = va_arg(args, int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_inspection_callback(aom_codec_alg_priv_t *ctx,
                                                   va_list args) {
#if !CONFIG_INSPECTION
 (void)ctx;
 (void)args;
 return AOM_CODEC_INCAPABLE;
#else
 aom_inspect_init *init = va_arg(args, aom_inspect_init *);
 ctx->inspect_cb = init->inspect_cb;
 ctx->inspect_ctx = init->inspect_ctx;
 return AOM_CODEC_OK;
#endif
}

static aom_codec_err_t ctrl_ext_tile_debug(aom_codec_alg_priv_t *ctx,
                                          va_list args) {
 ctx->ext_tile_debug = va_arg(args, int);
 return AOM_CODEC_OK;
}

static aom_codec_err_t ctrl_set_row_mt(aom_codec_alg_priv_t *ctx,
                                      va_list args) {
 ctx->row_mt = va_arg(args, unsigned int);
 return AOM_CODEC_OK;
}

static aom_codec_ctrl_fn_map_t decoder_ctrl_maps[] = {
 { AV1_COPY_REFERENCE, ctrl_copy_reference },

 // Setters
 { AV1_SET_REFERENCE, ctrl_set_reference },
 { AV1_INVERT_TILE_DECODE_ORDER, ctrl_set_invert_tile_order },
 { AV1_SET_BYTE_ALIGNMENT, ctrl_set_byte_alignment },
 { AV1_SET_SKIP_LOOP_FILTER, ctrl_set_skip_loop_filter },
 { AV1_SET_DECODE_TILE_ROW, ctrl_set_decode_tile_row },
 { AV1_SET_DECODE_TILE_COL, ctrl_set_decode_tile_col },
 { AV1_SET_TILE_MODE, ctrl_set_tile_mode },
 { AV1D_SET_IS_ANNEXB, ctrl_set_is_annexb },
 { AV1D_SET_OPERATING_POINT, ctrl_set_operating_point },
 { AV1D_SET_OUTPUT_ALL_LAYERS, ctrl_set_output_all_layers },
 { AV1_SET_INSPECTION_CALLBACK, ctrl_set_inspection_callback },
 { AV1D_EXT_TILE_DEBUG, ctrl_ext_tile_debug },
 { AV1D_SET_ROW_MT, ctrl_set_row_mt },
 { AV1D_SET_EXT_REF_PTR, ctrl_set_ext_ref_ptr },
 { AV1D_SET_SKIP_FILM_GRAIN, ctrl_set_skip_film_grain },

 // Getters
 { AOMD_GET_FRAME_CORRUPTED, ctrl_get_frame_corrupted },
 { AOMD_GET_LAST_QUANTIZER, ctrl_get_last_quantizer },
 { AOMD_GET_LAST_REF_UPDATES, ctrl_get_last_ref_updates },
 { AV1D_GET_BIT_DEPTH, ctrl_get_bit_depth },
 { AV1D_GET_IMG_FORMAT, ctrl_get_img_format },
 { AV1D_GET_TILE_SIZE, ctrl_get_tile_size },
 { AV1D_GET_TILE_COUNT, ctrl_get_tile_count },
 { AV1D_GET_DISPLAY_SIZE, ctrl_get_render_size },
 { AV1D_GET_FRAME_SIZE, ctrl_get_frame_size },
 { AV1_GET_ACCOUNTING, ctrl_get_accounting },
 { AV1_GET_NEW_FRAME_IMAGE, ctrl_get_new_frame_image },
 { AV1_COPY_NEW_FRAME_IMAGE, ctrl_copy_new_frame_image },
 { AV1_GET_REFERENCE, ctrl_get_reference },
 { AV1D_GET_FRAME_HEADER_INFO, ctrl_get_frame_header_info },
 { AV1D_GET_TILE_DATA, ctrl_get_tile_data },
 { AOMD_GET_FWD_KF_PRESENT, ctrl_get_fwd_kf_value },
 { AOMD_GET_ALTREF_PRESENT, ctrl_get_altref_present },
 { AOMD_GET_FRAME_FLAGS, ctrl_get_frame_flags },
 { AOMD_GET_TILE_INFO, ctrl_get_tile_info },
 { AOMD_GET_SCREEN_CONTENT_TOOLS_INFO, ctrl_get_screen_content_tools_info },
 { AOMD_GET_STILL_PICTURE, ctrl_get_still_picture },
 { AOMD_GET_SB_SIZE, ctrl_get_sb_size },
 { AOMD_GET_SHOW_EXISTING_FRAME_FLAG, ctrl_get_show_existing_frame_flag },
 { AOMD_GET_S_FRAME_INFO, ctrl_get_s_frame_info },
 { AOMD_GET_SHOW_FRAME_FLAG, ctrl_get_show_frame_flag },
 { AOMD_GET_BASE_Q_IDX, ctrl_get_base_q_idx },
 { AOMD_GET_ORDER_HINT, ctrl_get_order_hint },
 { AV1D_GET_MI_INFO, ctrl_get_mi_info },
 CTRL_MAP_END,
};

// This data structure and function are exported in aom/aomdx.h
#ifndef VERSION_STRING
#define VERSION_STRING
#endif
aom_codec_iface_t aom_codec_av1_dx_algo = {
 "AOMedia Project AV1 Decoder" VERSION_STRING,
 AOM_CODEC_INTERNAL_ABI_VERSION,
 AOM_CODEC_CAP_DECODER |
     AOM_CODEC_CAP_EXTERNAL_FRAME_BUFFER,  // aom_codec_caps_t
 decoder_init,                             // aom_codec_init_fn_t
 decoder_destroy,                          // aom_codec_destroy_fn_t
 decoder_ctrl_maps,                        // aom_codec_ctrl_fn_map_t
 {
     // NOLINT
     decoder_peek_si,    // aom_codec_peek_si_fn_t
     decoder_get_si,     // aom_codec_get_si_fn_t
     decoder_decode,     // aom_codec_decode_fn_t
     decoder_get_frame,  // aom_codec_get_frame_fn_t
     decoder_set_fb_fn,  // aom_codec_set_fb_fn_t
 },
 {
     // NOLINT
     0,
     NULL,  // aom_codec_enc_cfg_t
     NULL,  // aom_codec_encode_fn_t
     NULL,  // aom_codec_get_cx_data_fn_t
     NULL,  // aom_codec_enc_config_set_fn_t
     NULL,  // aom_codec_get_global_headers_fn_t
     NULL   // aom_codec_get_preview_frame_fn_t
 },
 NULL  // aom_codec_set_option_fn_t
};

// Decoder interface for inspecting frame data. It uses decoder_inspect instead
// of decoder_decode so it only decodes one frame at a time, whether the frame
// is shown or not.
aom_codec_iface_t aom_codec_av1_inspect_algo = {
 "AOMedia Project AV1 Decoder Inspector" VERSION_STRING,
 AOM_CODEC_INTERNAL_ABI_VERSION,
 AOM_CODEC_CAP_DECODER |
     AOM_CODEC_CAP_EXTERNAL_FRAME_BUFFER,  // aom_codec_caps_t
 decoder_init,                             // aom_codec_init_fn_t
 decoder_destroy,                          // aom_codec_destroy_fn_t
 decoder_ctrl_maps,                        // aom_codec_ctrl_fn_map_t
 {
     // NOLINT
     decoder_peek_si,    // aom_codec_peek_si_fn_t
     decoder_get_si,     // aom_codec_get_si_fn_t
     decoder_inspect,    // aom_codec_decode_fn_t
     decoder_get_frame,  // aom_codec_get_frame_fn_t
     decoder_set_fb_fn,  // aom_codec_set_fb_fn_t
 },
 {
     // NOLINT
     0,
     NULL,  // aom_codec_enc_cfg_t
     NULL,  // aom_codec_encode_fn_t
     NULL,  // aom_codec_get_cx_data_fn_t
     NULL,  // aom_codec_enc_config_set_fn_t
     NULL,  // aom_codec_get_global_headers_fn_t
     NULL   // aom_codec_get_preview_frame_fn_t
 },
 NULL  // aom_codec_set_option_fn_t
};

aom_codec_iface_t *aom_codec_av1_dx(void) { return &aom_codec_av1_dx_algo; }