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FFmpeg/libavcodec/libaomenc.c

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/*
* Copyright (c) 2010, Google, Inc.
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define AOM_DISABLE_CTRL_TYPECHECKS 1
#include <aom/aom_encoder.h>
#include <aom/aomcx.h>
#include "libavutil/base64.h"
#include "libavutil/common.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "internal.h"
#include "libaom.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 */
struct FrameListData *next;
};
typedef struct AOMEncoderContext {
AVClass *class;
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 lag_in_frames;
int error_resilient;
int crf;
int static_thresh;
int drop_threshold;
int noise_sensitivity;
} 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_STATIC_THRESHOLD] = "AOME_SET_STATIC_THRESHOLD",
[AV1E_SET_CHROMA_SUBSAMPLING_X] = "AV1E_SET_CHROMA_SUBSAMPLING_X",
[AV1E_SET_CHROMA_SUBSAMPLING_Y] = "AV1E_SET_CHROMA_SUBSAMPLING_Y",
};
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/%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_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(%zu)\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, "\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,
enum aome_enc_control_id id, 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);
return 0;
}
static av_cold int aom_init(AVCodecContext *avctx)
{
AOMContext *ctx = avctx->priv_data;
struct aom_codec_enc_cfg enccfg = { 0 };
AVCPBProperties *cpb_props;
int res, h_shift, v_shift;
const struct aom_codec_iface *iface = &aom_codec_av1_cx_algo;
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);
}
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 = avctx->thread_count;
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->bit_rate)
avctx->bit_rate = enccfg.rc_target_bitrate * 1000;
else
enccfg.rc_target_bitrate = av_rescale_rnd(avctx->bit_rate, 1, 1000,
AV_ROUND_NEAR_INF);
if (ctx->crf)
enccfg.rc_end_usage = AOM_CQ;
else if (avctx->rc_min_rate == avctx->rc_max_rate &&
avctx->rc_min_rate == avctx->bit_rate)
enccfg.rc_end_usage = AOM_CBR;
if (avctx->qmin > 0)
enccfg.rc_min_quantizer = avctx->qmin;
if (avctx->qmax > 0)
enccfg.rc_max_quantizer = avctx->qmax;
enccfg.rc_dropframe_thresh = ctx->drop_threshold;
// 0-100 (0 => CBR, 100 => VBR)
enccfg.rc_2pass_vbr_bias_pct = round(avctx->qcompress * 100);
enccfg.rc_2pass_vbr_minsection_pct =
avctx->rc_min_rate * 100LL / avctx->bit_rate;
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;
// _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 (%zu bytes) failed\n",
ctx->twopass_stats.sz);
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;
else if (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P10)
avctx->profile = enccfg.g_profile = FF_PROFILE_AV1_MAIN;
else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P10)
avctx->profile = enccfg.g_profile = FF_PROFILE_AV1_HIGH;
else {
avctx->profile = enccfg.g_profile = FF_PROFILE_AV1_PROFESSIONAL;
}
enccfg.g_error_resilient = ctx->error_resilient;
dump_enc_cfg(avctx, &enccfg);
/* Construct Encoder Context */
res = aom_codec_enc_init(&ctx->encoder, iface, &enccfg, 0);
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");
if (ctx->cpu_used != INT_MIN)
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);
codecctl_int(avctx, AOME_SET_STATIC_THRESHOLD, ctx->static_thresh);
codecctl_int(avctx, AOME_SET_CQ_LEVEL, ctx->crf);
res = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &h_shift, &v_shift);
if (res < 0)
return res;
codecctl_int(avctx, AV1E_SET_CHROMA_SUBSAMPLING_X, h_shift);
codecctl_int(avctx, AV1E_SET_CHROMA_SUBSAMPLING_Y, v_shift);
// provide dummy value to initialize wrapper, values will be updated each _encode()
aom_img_wrap(&ctx->rawimg, ff_aom_pixfmt_to_imgfmt(avctx->pix_fmt),
avctx->width, avctx->height, 1, (unsigned char *)1);
cpb_props = ff_add_cpb_side_data(avctx);
if (!cpb_props)
return AVERROR(ENOMEM);
if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
aom_fixed_buf_t *seq = aom_codec_get_global_headers(&ctx->encoder);
if (!seq)
return AVERROR_UNKNOWN;
avctx->extradata = av_malloc(seq->sz + AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata) {
free(seq->buf);
free(seq);
return AVERROR(ENOMEM);
}
avctx->extradata_size = seq->sz;
memcpy(avctx->extradata, seq->buf, seq->sz);
memset(avctx->extradata + seq->sz, 0, AV_INPUT_BUFFER_PADDING_SIZE);
/* Doxy says: "The caller owns the memory associated with this buffer.
* Memory is allocated using malloc(), and should be freed
* via call to free()"
*/
free(seq->buf);
free(seq);
}
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(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;
}
/**
* 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)
{
int ret = ff_alloc_packet(pkt, cx_frame->sz);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"Error getting output packet of size %zu.\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;
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 */
assert(!ctx->coded_frame_list);
cx_pktcpy(&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(cx_frame, pkt);
cx_frame->buf = av_malloc(cx_frame->sz);
if (!cx_frame->buf) {
av_log(avctx, AV_LOG_ERROR,
"Data buffer alloc (%zu 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;
}
case AOM_CODEC_PSNR_PKT: // FIXME add support for AV_CODEC_FLAG_PSNR
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 (%zu 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;
}
#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}, INT_MIN, INT_MAX, VE},
{ "auto-alt-ref", "Enable use of alternate reference "
"frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, 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},
{ "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 = 0}, 0, 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 },
{ "noise-sensitivity", "Noise sensitivity", OFFSET(noise_sensitivity), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 4, VE},
{ NULL }
};
static const AVCodecDefault defaults[] = {
{ "qmin", "-1" },
{ "qmax", "-1" },
{ "g", "-1" },
{ "keyint_min", "-1" },
{ NULL },
};
static const AVClass class_aom = {
.class_name = "libaom 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 = aom_init,
.encode2 = aom_encode,
.close = aom_free,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_EXPERIMENTAL,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
.priv_class = &class_aom,
.defaults = defaults,
.wrapper_name = "libaom",
};