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FFmpeg/libavcodec/libxeve.c

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/*
* libxeve encoder
* EVC (MPEG-5 Essential Video Coding) encoding using XEVE MPEG-5 EVC encoder library
*
* Copyright (C) 2021 Dawid Kozinski <d.kozinski@samsung.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <float.h>
#include <stdlib.h>
#include <xeve.h>
#include "libavutil/internal.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/time.h"
#include "libavutil/cpu.h"
#include "libavutil/avstring.h"
#include "avcodec.h"
#include "internal.h"
#include "packet_internal.h"
#include "codec_internal.h"
#include "profiles.h"
#include "encode.h"
#define MAX_BS_BUF (16*1024*1024)
/**
* Error codes
*/
#define XEVE_PARAM_BAD_NAME -100
#define XEVE_PARAM_BAD_VALUE -200
/**
* Encoder states
*
* STATE_ENCODING - the encoder receives and processes input frames
* STATE_BUMPING - there are no more input frames, however the encoder still processes previously received data
*/
typedef enum State {
STATE_ENCODING,
STATE_BUMPING,
} State;
/**
* The structure stores all the states associated with the instance of Xeve MPEG-5 EVC encoder
*/
typedef struct XeveContext {
const AVClass *class;
XEVE id; // XEVE instance identifier
XEVE_CDSC cdsc; // coding parameters i.e profile, width & height of input frame, num of therads, frame rate ...
XEVE_BITB bitb; // bitstream buffer (output)
XEVE_STAT stat; // encoding status (output)
XEVE_IMGB imgb; // image buffer (input)
State state; // encoder state (skipping, encoding, bumping)
int profile_id; // encoder profile (main, baseline)
int preset_id; // preset of xeve ( fast, medium, slow, placebo)
int tune_id; // tune of xeve (psnr, zerolatency)
// variables for rate control modes
int rc_mode; // Rate control mode [ 0(CQP) / 1(ABR) / 2(CRF) ]
int qp; // quantization parameter (QP) [0,51]
int crf; // constant rate factor (CRF) [10,49]
int hash; // embed picture signature (HASH) for conformance checking in decoding
int sei_info; // embed Supplemental enhancement information while encoding
int color_format; // input data color format: currently only XEVE_CF_YCBCR420 is supported
AVDictionary *xeve_params;
} XeveContext;
/**
* Convert FFmpeg pixel format (AVPixelFormat) to XEVE pre-defined color format
*
* @param[in] av_pix_fmt pixel format (@see https://ffmpeg.org/doxygen/trunk/pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5)
* @param[out] xeve_col_fmt XEVE pre-defined color format (@see xeve.h)
*
* @return 0 on success, negative value on failure
*/
static int libxeve_color_fmt(enum AVPixelFormat av_pix_fmt, int *xeve_col_fmt)
{
switch (av_pix_fmt) {
case AV_PIX_FMT_YUV420P:
*xeve_col_fmt = XEVE_CF_YCBCR420;
break;
case AV_PIX_FMT_YUV420P10:
*xeve_col_fmt = XEVE_CF_YCBCR420;
break;
default:
*xeve_col_fmt = XEVE_CF_UNKNOWN;
return AVERROR_INVALIDDATA;
}
return 0;
}
/**
* Convert FFmpeg pixel format (AVPixelFormat) into XEVE pre-defined color space
*
* @param[in] px_fmt pixel format (@see https://ffmpeg.org/doxygen/trunk/pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5)
*
* @return XEVE pre-defined color space (@see xeve.h) on success, XEVE_CF_UNKNOWN on failure
*/
static int libxeve_color_space(enum AVPixelFormat av_pix_fmt)
{
/* color space of input image */
int cs = XEVE_CF_UNKNOWN;
switch (av_pix_fmt) {
case AV_PIX_FMT_YUV420P:
cs = XEVE_CS_YCBCR420;
break;
case AV_PIX_FMT_YUV420P10:
#if AV_HAVE_BIGENDIAN
cs = XEVE_CS_SET(XEVE_CF_YCBCR420, 10, 1);
#else
cs = XEVE_CS_YCBCR420_10LE;
#endif
break;
default:
cs = XEVE_CF_UNKNOWN;
break;
}
return cs;
}
/**
* The function returns a pointer to the object of the XEVE_CDSC type.
* XEVE_CDSC contains all encoder parameters that should be initialized before the encoder is used.
*
* The field values of the XEVE_CDSC structure are populated based on:
* - the corresponding field values of the AvCodecConetxt structure,
* - the xeve encoder specific option values,
* (the full list of options available for xeve encoder is displayed after executing the command ./ffmpeg --help encoder = libxeve)
*
* The order of processing input data and populating the XEVE_CDSC structure
* 1) first, the fields of the AVCodecContext structure corresponding to the provided input options are processed,
* (i.e -pix_fmt yuv420p -s:v 1920x1080 -r 30 -profile:v 0)
* 2) then xeve-specific options added as AVOption to the xeve AVCodec implementation
* (i.e -preset 0)
*
* Keep in mind that, there are options that can be set in different ways.
* In this case, please follow the above-mentioned order of processing.
* The most recent assignments overwrite the previous values.
*
* @param[in] avctx codec context (AVCodecContext)
* @param[out] cdsc contains all Xeve MPEG-5 EVC encoder encoder parameters that should be initialized before the encoder is use
*
* @return 0 on success, negative error code on failure
*/
static int get_conf(AVCodecContext *avctx, XEVE_CDSC *cdsc)
{
XeveContext *xectx = NULL;
int ret;
xectx = avctx->priv_data;
/* initialize xeve_param struct with default values */
ret = xeve_param_default(&cdsc->param);
if (XEVE_FAILED(ret)) {
av_log(avctx, AV_LOG_ERROR, "Cannot set_default parameter\n");
return AVERROR_EXTERNAL;
}
/* read options from AVCodecContext */
if (avctx->width > 0)
cdsc->param.w = avctx->width;
if (avctx->height > 0)
cdsc->param.h = avctx->height;
if (avctx->framerate.num > 0) {
// fps can be float number, but xeve API doesn't support it
cdsc->param.fps = lrintf(av_q2d(avctx->framerate));
}
// GOP size (key-frame interval, I-picture period)
cdsc->param.keyint = avctx->gop_size; // 0: only one I-frame at the first time; 1: every frame is coded in I-frame
if (avctx->max_b_frames == 0 || avctx->max_b_frames == 1 || avctx->max_b_frames == 3 ||
avctx->max_b_frames == 7 || avctx->max_b_frames == 15) // number of b-frames
cdsc->param.bframes = avctx->max_b_frames;
else {
av_log(avctx, AV_LOG_ERROR, "Incorrect value for maximum number of B frames: (%d) \n"
"Acceptable values for bf option (maximum number of B frames) are 0,1,3,7 or 15\n", avctx->max_b_frames);
return AVERROR_INVALIDDATA;
}
cdsc->param.level_idc = avctx->level;
if (avctx->rc_buffer_size) // VBV buf size
cdsc->param.vbv_bufsize = (int)(avctx->rc_buffer_size / 1000);
cdsc->param.rc_type = xectx->rc_mode;
if (xectx->rc_mode == XEVE_RC_CQP)
cdsc->param.qp = xectx->qp;
else if (xectx->rc_mode == XEVE_RC_ABR) {
if (avctx->bit_rate / 1000 > INT_MAX || avctx->rc_max_rate / 1000 > INT_MAX) {
av_log(avctx, AV_LOG_ERROR, "Not supported bitrate bit_rate and rc_max_rate > %d000\n", INT_MAX);
return AVERROR_INVALIDDATA;
}
cdsc->param.bitrate = (int)(avctx->bit_rate / 1000);
} else if (xectx->rc_mode == XEVE_RC_CRF)
cdsc->param.crf = xectx->crf;
else {
av_log(avctx, AV_LOG_ERROR, "Not supported rate control type: %d\n", xectx->rc_mode);
return AVERROR_INVALIDDATA;
}
if (avctx->thread_count <= 0) {
int cpu_count = av_cpu_count();
cdsc->param.threads = (cpu_count < XEVE_MAX_THREADS) ? cpu_count : XEVE_MAX_THREADS;
} else if (avctx->thread_count > XEVE_MAX_THREADS)
cdsc->param.threads = XEVE_MAX_THREADS;
else
cdsc->param.threads = avctx->thread_count;
libxeve_color_fmt(avctx->pix_fmt, &xectx->color_format);
cdsc->param.cs = XEVE_CS_SET(xectx->color_format, cdsc->param.codec_bit_depth, AV_HAVE_BIGENDIAN);
cdsc->max_bs_buf_size = MAX_BS_BUF;
ret = xeve_param_ppt(&cdsc->param, xectx->profile_id, xectx->preset_id, xectx->tune_id);
if (XEVE_FAILED(ret)) {
av_log(avctx, AV_LOG_ERROR, "Cannot set profile(%d), preset(%d), tune(%d)\n", xectx->profile_id, xectx->preset_id, xectx->tune_id);
return AVERROR_EXTERNAL;
}
return 0;
}
/**
* Set XEVE_CFG_SET_USE_PIC_SIGNATURE for encoder
*
* @param[in] logger context
* @param[in] id XEVE encodec instance identifier
* @param[in] ctx the structure stores all the states associated with the instance of Xeve MPEG-5 EVC encoder
*
* @return 0 on success, negative error code on failure
*/
static int set_extra_config(AVCodecContext *avctx, XEVE id, XeveContext *ctx)
{
int ret, size;
size = 4;
// embed SEI messages identifying encoder parameters and command line arguments
// - 0: off\n"
// - 1: emit sei info"
//
// SEI - Supplemental enhancement information contains information
// that is not necessary to decode the samples of coded pictures from VCL NAL units.
// Some SEI message information is required to check bitstream conformance
// and for output timing decoder conformance.
// @see ISO_IEC_23094-1_2020 7.4.3.5
// @see ISO_IEC_23094-1_2020 Annex D
ret = xeve_config(id, XEVE_CFG_SET_SEI_CMD, &ctx->sei_info, &size); // sei_cmd_info
if (XEVE_FAILED(ret)) {
av_log(avctx, AV_LOG_ERROR, "Failed to set config for sei command info messages\n");
return AVERROR_EXTERNAL;
}
ret = xeve_config(id, XEVE_CFG_SET_USE_PIC_SIGNATURE, &ctx->hash, &size);
if (XEVE_FAILED(ret)) {
av_log(avctx, AV_LOG_ERROR, "Failed to set config for picture signature\n");
return AVERROR_EXTERNAL;
}
return 0;
}
/**
* @brief Switch encoder to bumping mode
*
* @param id XEVE encodec instance identifier
* @return 0 on success, negative error code on failure
*/
static int setup_bumping(XEVE id)
{
int val = 1;
int size = sizeof(int);
if (XEVE_FAILED(xeve_config(id, XEVE_CFG_SET_FORCE_OUT, (void *)(&val), &size)))
return AVERROR_EXTERNAL;
return 0;
}
/**
* @brief Initialize eXtra-fast Essential Video Encoder codec
* Create an encoder instance and allocate all the needed resources
*
* @param avctx codec context
* @return 0 on success, negative error code on failure
*/
static av_cold int libxeve_init(AVCodecContext *avctx)
{
XeveContext *xectx = avctx->priv_data;
unsigned char *bs_buf = NULL;
int i;
int shift_h = 0;
int shift_v = 0;
int width_chroma = 0;
int height_chroma = 0;
XEVE_IMGB *imgb = NULL;
int ret = 0;
XEVE_CDSC *cdsc = &(xectx->cdsc);
/* allocate bitstream buffer */
bs_buf = av_malloc(MAX_BS_BUF);
if (bs_buf == NULL) {
av_log(avctx, AV_LOG_ERROR, "Cannot allocate bitstream buffer\n");
return AVERROR(ENOMEM);
}
xectx->bitb.addr = bs_buf;
xectx->bitb.bsize = MAX_BS_BUF;
/* read configurations and set values for created descriptor (XEVE_CDSC) */
if ((ret = get_conf(avctx, cdsc)) != 0) {
av_log(avctx, AV_LOG_ERROR, "Cannot get configuration\n");
return AVERROR(EINVAL);
}
if ((ret = xeve_param_check(&cdsc->param)) != 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid configuration\n");
return AVERROR(EINVAL);
}
{
const AVDictionaryEntry *en = NULL;
while (en = av_dict_iterate(xectx->xeve_params, en)) {
if ((ret = xeve_param_parse(&cdsc->param, en->key, en->value)) < 0) {
av_log(avctx, AV_LOG_WARNING,
"Error parsing option '%s = %s'.\n",
en->key, en->value);
}
}
}
/* create encoder */
xectx->id = xeve_create(cdsc, NULL);
if (xectx->id == NULL) {
av_log(avctx, AV_LOG_ERROR, "Cannot create XEVE encoder\n");
return AVERROR_EXTERNAL;
}
if ((ret = set_extra_config(avctx, xectx->id, xectx)) != 0) {
av_log(avctx, AV_LOG_ERROR, "Cannot set extra configuration\n");
return AVERROR(EINVAL);
}
if ((ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v)) != 0) {
av_log(avctx, AV_LOG_ERROR, "Failed to get chroma shift\n");
return AVERROR(EINVAL);
}
// Chroma subsampling
//
// YUV format explanation
// shift_h == 1 && shift_v == 1 : YUV420
// shift_h == 1 && shift_v == 0 : YUV422
// shift_h == 0 && shift_v == 0 : YUV444
//
width_chroma = AV_CEIL_RSHIFT(avctx->width, shift_h);
height_chroma = AV_CEIL_RSHIFT(avctx->height, shift_v);
/* set default values for input image buffer */
imgb = &xectx->imgb;
imgb->cs = libxeve_color_space(avctx->pix_fmt);
imgb->np = 3; /* only for yuv420p, yuv420ple */
for (i = 0; i < imgb->np; i++)
imgb->x[i] = imgb->y[i] = 0;
imgb->w[0] = imgb->aw[0] = avctx->width; // width luma
imgb->w[1] = imgb->w[2] = imgb->aw[1] = imgb->aw[2] = width_chroma;
imgb->h[0] = imgb->ah[0] = avctx->height; // height luma
imgb->h[1] = imgb->h[2] = imgb->ah[1] = imgb->ah[2] = height_chroma;
xectx->state = STATE_ENCODING;
return 0;
}
/**
* Encode raw data frame into EVC packet
*
* @param[in] avctx codec context
* @param[out] avpkt output AVPacket containing encoded data
* @param[in] frame AVFrame containing the raw data to be encoded
* @param[out] got_packet encoder sets to 0 or 1 to indicate that a
* non-empty packet was returned in pkt
*
* @return 0 on success, negative error code on failure
*/
static int libxeve_encode(AVCodecContext *avctx, AVPacket *avpkt,
const AVFrame *frame, int *got_packet)
{
XeveContext *xectx = avctx->priv_data;
int ret = -1;
// No more input frames are available but encoder still can have some data in its internal buffer to process
// and some frames to dump.
if (xectx->state == STATE_ENCODING && frame == NULL) {
if (setup_bumping(xectx->id) == 0)
xectx->state = STATE_BUMPING; // Entering bumping process
else {
av_log(avctx, AV_LOG_ERROR, "Failed to setup bumping\n");
return 0;
}
}
if (xectx->state == STATE_ENCODING) {
int i;
XEVE_IMGB *imgb = NULL;
imgb = &xectx->imgb;
for (i = 0; i < imgb->np; i++) {
imgb->a[i] = frame->data[i];
imgb->s[i] = frame->linesize[i];
}
imgb->ts[XEVE_TS_PTS] = frame->pts;
/* push image to encoder */
ret = xeve_push(xectx->id, imgb);
if (XEVE_FAILED(ret)) {
av_log(avctx, AV_LOG_ERROR, "xeve_push() failed\n");
return AVERROR_EXTERNAL;
}
}
if (xectx->state == STATE_ENCODING || xectx->state == STATE_BUMPING) {
/* encoding */
ret = xeve_encode(xectx->id, &(xectx->bitb), &(xectx->stat));
if (XEVE_FAILED(ret)) {
av_log(avctx, AV_LOG_ERROR, "xeve_encode() failed\n");
return AVERROR_EXTERNAL;
}
/* store bitstream */
if (ret == XEVE_OK_OUT_NOT_AVAILABLE) { // Return OK but picture is not available yet
*got_packet = 0;
return 0;
} else if (ret == XEVE_OK) {
int av_pic_type;
if (xectx->stat.write > 0) {
ret = ff_get_encode_buffer(avctx, avpkt, xectx->stat.write, 0);
if (ret < 0)
return ret;
memcpy(avpkt->data, xectx->bitb.addr, xectx->stat.write);
avpkt->time_base.num = 1;
avpkt->time_base.den = xectx->cdsc.param.fps;
avpkt->pts = xectx->bitb.ts[XEVE_TS_PTS];
avpkt->dts = xectx->bitb.ts[XEVE_TS_DTS];
switch(xectx->stat.stype) {
case XEVE_ST_I:
av_pic_type = AV_PICTURE_TYPE_I;
avpkt->flags |= AV_PKT_FLAG_KEY;
break;
case XEVE_ST_P:
av_pic_type = AV_PICTURE_TYPE_P;
break;
case XEVE_ST_B:
av_pic_type = AV_PICTURE_TYPE_B;
break;
case XEVE_ST_UNKNOWN:
av_log(avctx, AV_LOG_ERROR, "Unknown slice type\n");
return AVERROR_INVALIDDATA;
}
ff_side_data_set_encoder_stats(avpkt, xectx->stat.qp * FF_QP2LAMBDA, NULL, 0, av_pic_type);
*got_packet = 1;
}
} else if (ret == XEVE_OK_NO_MORE_FRM) {
// Return OK but no more frames
return 0;
} else {
av_log(avctx, AV_LOG_ERROR, "Invalid return value: %d\n", ret);
return AVERROR_EXTERNAL;
}
} else {
av_log(avctx, AV_LOG_ERROR, "Udefined encoder state\n");
return AVERROR_INVALIDDATA;
}
return 0;
}
/**
* Destroy the encoder and release all the allocated resources
*
* @param avctx codec context
* @return 0 on success, negative error code on failure
*/
static av_cold int libxeve_close(AVCodecContext *avctx)
{
XeveContext *xectx = avctx->priv_data;
if (xectx->id) {
xeve_delete(xectx->id);
xectx->id = NULL;
}
av_free(xectx->bitb.addr); /* release bitstream buffer */
return 0;
}
#define OFFSET(x) offsetof(XeveContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const enum AVPixelFormat supported_pixel_formats[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV420P10,
AV_PIX_FMT_NONE
};
// Consider using following options (./ffmpeg --help encoder=libxeve)
//
static const AVOption libxeve_options[] = {
{ "preset", "Encoding preset for setting encoding speed", OFFSET(preset_id), AV_OPT_TYPE_INT, { .i64 = XEVE_PRESET_MEDIUM }, XEVE_PRESET_DEFAULT, XEVE_PRESET_PLACEBO, VE, .unit = "preset" },
{ "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_DEFAULT }, INT_MIN, INT_MAX, VE, .unit = "preset" },
{ "fast", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_FAST }, INT_MIN, INT_MAX, VE, .unit = "preset" },
{ "medium", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_MEDIUM }, INT_MIN, INT_MAX, VE, .unit = "preset" },
{ "slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_SLOW }, INT_MIN, INT_MAX, VE, .unit = "preset" },
{ "placebo", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_PLACEBO }, INT_MIN, INT_MAX, VE, .unit = "preset" },
{ "tune", "Tuning parameter for special purpose operation", OFFSET(tune_id), AV_OPT_TYPE_INT, { .i64 = XEVE_TUNE_NONE }, XEVE_TUNE_NONE, XEVE_TUNE_PSNR, VE, .unit = "tune"},
{ "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_TUNE_NONE }, INT_MIN, INT_MAX, VE, .unit = "tune" },
{ "zerolatency", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_TUNE_ZEROLATENCY }, INT_MIN, INT_MAX, VE, .unit = "tune" },
{ "psnr", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_TUNE_PSNR }, INT_MIN, INT_MAX, VE, .unit = "tune" },
{ "profile", "Encoding profile", OFFSET(profile_id), AV_OPT_TYPE_INT, { .i64 = XEVE_PROFILE_BASELINE }, XEVE_PROFILE_BASELINE, XEVE_PROFILE_MAIN, VE, .unit = "profile" },
{ "baseline", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PROFILE_BASELINE }, INT_MIN, INT_MAX, VE, .unit = "profile" },
{ "main", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PROFILE_MAIN }, INT_MIN, INT_MAX, VE, .unit = "profile" },
{ "rc_mode", "Rate control mode", OFFSET(rc_mode), AV_OPT_TYPE_INT, { .i64 = XEVE_RC_CQP }, XEVE_RC_CQP, XEVE_RC_CRF, VE, .unit = "rc_mode" },
{ "CQP", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_RC_CQP }, INT_MIN, INT_MAX, VE, .unit = "rc_mode" },
{ "ABR", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_RC_ABR }, INT_MIN, INT_MAX, VE, .unit = "rc_mode" },
{ "CRF", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_RC_CRF }, INT_MIN, INT_MAX, VE, .unit = "rc_mode" },
{ "qp", "Quantization parameter value for CQP rate control mode", OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 32 }, 0, 51, VE },
{ "crf", "Constant rate factor value for CRF rate control mode", OFFSET(crf), AV_OPT_TYPE_INT, { .i64 = 32 }, 10, 49, VE },
{ "hash", "Embed picture signature (HASH) for conformance checking in decoding", OFFSET(hash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "sei_info", "Embed SEI messages identifying encoder parameters and command line arguments", OFFSET(sei_info), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "xeve-params", "Override the xeve configuration using a :-separated list of key=value parameters", OFFSET(xeve_params), AV_OPT_TYPE_DICT, { 0 }, 0, 0, VE },
{ NULL }
};
static const AVClass libxeve_class = {
.class_name = "libxeve",
.item_name = av_default_item_name,
.option = libxeve_options,
.version = LIBAVUTIL_VERSION_INT,
};
/**
* libavcodec generic global options, which can be set on all the encoders and decoders
* @see https://www.ffmpeg.org/ffmpeg-codecs.html#Codec-Options
*/
static const FFCodecDefault libxeve_defaults[] = {
{ "b", "0" }, // bitrate in terms of kilo-bits per second
{ "g", "0" }, // gop_size (key-frame interval 0: only one I-frame at the first time; 1: every frame is coded in I-frame)
{ "bf", "15"}, // maximum number of B frames (0: no B-frames, 1,3,7,15)
{ "threads", "0"}, // number of threads to be used (0: automatically select the number of threads to set)
{ NULL },
};
const FFCodec ff_libxeve_encoder = {
.p.name = "libxeve",
.p.long_name = NULL_IF_CONFIG_SMALL("libxeve MPEG-5 EVC"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_EVC,
.init = libxeve_init,
FF_CODEC_ENCODE_CB(libxeve_encode),
.close = libxeve_close,
.priv_data_size = sizeof(XeveContext),
.p.priv_class = &libxeve_class,
.defaults = libxeve_defaults,
.p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_DR1,
.p.profiles = NULL_IF_CONFIG_SMALL(ff_evc_profiles),
.p.wrapper_name = "libxeve",
.p.pix_fmts = supported_pixel_formats,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_NOT_INIT_THREADSAFE,
};