> From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf
> Of Jing Sun
> Sent: Friday, March 29, 2019 4:22 PM
> To: ffmpeg-devel@ffmpeg.org
> Cc: Sun, Jing A <jing.a....@intel.com>; Huang, Zhengxu
> <zhengxu.hu...@intel.com>; Jun Zhao <jun.z...@intel.com>; Tmar,
> Hassene <hassene.t...@intel.com>
> Subject: [FFmpeg-devel] [PATCH v10 1/2] lavc/svt_hevc: add libsvt hevc
> encoder wrapper
>
> Signed-off-by: Zhengxu Huang <zhengxu.hu...@intel.com>
> Signed-off-by: Hassene Tmar <hassene.t...@intel.com>
> Signed-off-by: Jun Zhao <jun.z...@intel.com>
> Signed-off-by: Jing Sun <jing.a....@intel.com>
> ---
> configure | 4 +
> libavcodec/Makefile | 1 +
> libavcodec/allcodecs.c | 1 +
> libavcodec/libsvt_hevc.c | 500
> +++++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 506 insertions(+)
> create mode 100644 libavcodec/libsvt_hevc.c
>
> diff --git a/configure b/configure
> index 938ff10..2aabac4 100755
> --- a/configure
> +++ b/configure
> @@ -264,6 +264,7 @@ External library support:
> --enable-libspeex enable Speex de/encoding via libspeex [no]
> --enable-libsrt enable Haivision SRT protocol via libsrt [no]
> --enable-libssh enable SFTP protocol via libssh [no]
> + --enable-libsvthevc enable HEVC encoding via svt [no]
> --enable-libtensorflow enable TensorFlow as a DNN module backend
> for DNN based filters like sr [no]
> --enable-libtesseract enable Tesseract, needed for ocr filter [no]
> @@ -1784,6 +1785,7 @@ EXTERNAL_LIBRARY_LIST="
> libspeex
> libsrt
> libssh
> + libsvthevc
> libtensorflow
> libtesseract
> libtheora
> @@ -3173,6 +3175,7 @@ libshine_encoder_select="audio_frame_queue"
> libspeex_decoder_deps="libspeex"
> libspeex_encoder_deps="libspeex"
> libspeex_encoder_select="audio_frame_queue"
> +libsvt_hevc_encoder_deps="libsvthevc"
> libtheora_encoder_deps="libtheora"
> libtwolame_encoder_deps="libtwolame"
> libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
> @@ -6209,6 +6212,7 @@ enabled libsoxr && require libsoxr
> soxr.h soxr_create -lsoxr
> enabled libssh && require_pkg_config libssh libssh
> libssh/sftp.h sftp_init
> enabled libspeex && require_pkg_config libspeex speex
> speex/speex.h speex_decoder_init
> enabled libsrt && require_pkg_config libsrt "srt >= 1.3.0"
> srt/srt.h srt_socket
> +enabled libsvthevc && require_pkg_config libsvthevc SvtHevcEnc
> EbApi.h EbInitHandle
> enabled libtensorflow && require libtensorflow tensorflow/c/c_api.h
> TF_Version -ltensorflow
> enabled libtesseract && require_pkg_config libtesseract tesseract
> tesseract/capi.h TessBaseAPICreate
> enabled libtheora && require libtheora theora/theoraenc.h
> th_info_init -ltheoraenc -ltheoradec -logg
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile index
> 15c43a8..c93e545 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -987,6 +987,7 @@ OBJS-$(CONFIG_LIBOPUS_ENCODER)
> += libopusenc.o libopus.o \
> OBJS-$(CONFIG_LIBSHINE_ENCODER) += libshine.o
> OBJS-$(CONFIG_LIBSPEEX_DECODER) += libspeexdec.o
> OBJS-$(CONFIG_LIBSPEEX_ENCODER) += libspeexenc.o
> +OBJS-$(CONFIG_LIBSVT_HEVC_ENCODER) += libsvt_hevc.o
> OBJS-$(CONFIG_LIBTHEORA_ENCODER) += libtheoraenc.o
> OBJS-$(CONFIG_LIBTWOLAME_ENCODER) += libtwolame.o
> OBJS-$(CONFIG_LIBVO_AMRWBENC_ENCODER) +=
> libvo-amrwbenc.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index
> b26aeca..e93f66f 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -703,6 +703,7 @@ extern AVCodec ff_librsvg_decoder; extern
> AVCodec ff_libshine_encoder; extern AVCodec ff_libspeex_encoder;
> extern AVCodec ff_libspeex_decoder;
> +extern AVCodec ff_libsvt_hevc_encoder;
> extern AVCodec ff_libtheora_encoder;
> extern AVCodec ff_libtwolame_encoder;
> extern AVCodec ff_libvo_amrwbenc_encoder; diff --git
> a/libavcodec/libsvt_hevc.c b/libavcodec/libsvt_hevc.c new file mode 100644
> index 0000000..4ef06a8
> --- /dev/null
> +++ b/libavcodec/libsvt_hevc.c
> @@ -0,0 +1,500 @@
> +/*
> +* Scalable Video Technology for HEVC encoder library plugin
> +*
> +* Copyright (c) 2018 Intel Corporation
It is 2019 now.
> +* This file is part of FFmpeg.
> +*
> +* FFmpeg is free software; you can redistribute it and/or
> +* modify it under the terms of the GNU Lesser General Public
> +* License as published by the Free Software Foundation; either
> +* version 2.1 of the License, or (at your option) any later version.
> +*
> +* FFmpeg is distributed in the hope that it will be useful,
> +* but WITHOUT ANY WARRANTY; without even the implied warranty of
> +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> GNU
> +* Lesser General Public License for more details.
> +*
> +* You should have received a copy of the GNU Lesser General Public
> +* License along with this program; if not, write to the Free Software
> +* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> +02110-1301 USA */
> +
> +#include "EbErrorCodes.h"
> +#include "EbTime.h"
> +#include "EbApi.h"
> +
> +#include "libavutil/common.h"
> +#include "libavutil/frame.h"
> +#include "libavutil/opt.h"
> +
> +#include "internal.h"
> +#include "avcodec.h"
> +
> +typedef enum eos_status {
> + EOS_NOT_REACHED = 0,
> + EOS_REACHED,
> + EOS_TOTRIGGER
> +}EOS_STATUS;
> +
> +typedef struct SvtContext {
> + AVClass *class;
> +
> + EB_H265_ENC_CONFIGURATION enc_params;
> + EB_COMPONENTTYPE *svt_handle;
> + EB_BUFFERHEADERTYPE in_buf;
> + EOS_STATUS eos_flag;
> +
> + // User options.
> + int vui_info;
> + int hierarchical_level;
> + int la_depth;
> + int enc_mode;
> + int rc_mode;
> + int scd;
> + int tune;
> + int qp;
> + int hdr;
> +
> + int forced_idr;
> +
> + int aud;
> +
> + int profile;
> + int tier;
> + int level;
> +
> + int base_layer_switch_mode;
> +} SvtContext;
> +
> +static int error_mapping(EB_ERRORTYPE svt_ret) {
> + int err;
> +
> + switch (svt_ret) {
> + case EB_ErrorInsufficientResources:
> + err = AVERROR(ENOMEM);
> + break;
> +
> + case EB_ErrorUndefined:
> + case EB_ErrorInvalidComponent:
> + case EB_ErrorBadParameter:
> + err = AVERROR(EINVAL);
> + break;
> +
> + case EB_ErrorDestroyThreadFailed:
> + case EB_ErrorSemaphoreUnresponsive:
> + case EB_ErrorDestroySemaphoreFailed:
> + case EB_ErrorCreateMutexFailed:
> + case EB_ErrorMutexUnresponsive:
> + case EB_ErrorDestroyMutexFailed:
> + err = AVERROR_EXTERNAL;
> + break;
> +
> + case EB_NoErrorEmptyQueue:
> + err = AVERROR(EAGAIN);
> +
> + case EB_ErrorNone:
> + err = 0;
> + break;
> +
> + default:
> + err = AVERROR_UNKNOWN;
> + }
How about add some error message for each case instead of just return?
> + return err;
> +}
> +
> +static void free_buffer(SvtContext *svt_enc) {
> + uint8_t *in_data = svt_enc->in_buf.pBuffer;
> +
> + av_freep(&in_data);
> +}
> +
> +static int alloc_buffer(EB_H265_ENC_CONFIGURATION *config, SvtContext
> +*svt_enc) {
> + EB_H265_ENC_INPUT *in_data;
> +
> + // allocate buffer for in and out
> + in_data = av_mallocz(sizeof(*in_data));
> + if (!in_data)
> + goto failed;
> + svt_enc->in_buf.pBuffer = (unsigned char *)in_data;
> +
> + svt_enc->in_buf.nSize = sizeof(svt_enc->in_buf);
> + svt_enc->in_buf.pAppPrivate = NULL;
> +
> + return 0;
> +
> +failed:
> + free_buffer(svt_enc);
> + return AVERROR(ENOMEM);
> +}
> +
> +static int config_enc_params(EB_H265_ENC_CONFIGURATION *param,
> + AVCodecContext *avctx) {
> + SvtContext *svt_enc = avctx->priv_data;
> + int ret;
> +
> + param->sourceWidth = avctx->width;
> + param->sourceHeight = avctx->height;
> + param->encoderBitDepth = 8;
> +
> + if (avctx->pix_fmt == AV_PIX_FMT_YUV420P10LE) {
> + av_log(avctx, AV_LOG_DEBUG, "Encoder 10 bits depth input\n");
> +
> + param->encoderBitDepth = 10;
> + }
Get the bitdepth informat for pix_fmt should be easier to maintain (e.g: 12bit
support).
Here is an example:
https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/vaapi_encode_h265.c#L295
> + param->encoderColorFormat = EB_YUV420;
> +
> + // Update param from options
> + param->hierarchicalLevels = svt_enc->hierarchical_level - 1;
> + param->encMode = svt_enc->enc_mode;
> + param->profile = svt_enc->profile;
> + param->tier = svt_enc->tier;
> + param->level = svt_enc->level;
> + param->rateControlMode = svt_enc->rc_mode;
> + param->sceneChangeDetection = svt_enc->scd;
> + param->tune = svt_enc->tune;
> + param->baseLayerSwitchMode =
> svt_enc->base_layer_switch_mode;
> + param->qp = svt_enc->qp;
> + param->accessUnitDelimiter = svt_enc->aud;
> +
> + param->targetBitRate = avctx->bit_rate;
> + if (avctx->gop_size > 0)
> + param->intraPeriodLength = avctx->gop_size - 1;
> +
> + if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
> + param->frameRateNumerator = avctx->framerate.num;
> + param->frameRateDenominator =
> + avctx->framerate.den * avctx->ticks_per_frame;
> + } else {
> + param->frameRateNumerator = avctx->time_base.den;
> + param->frameRateDenominator =
> + avctx->time_base.num * avctx->ticks_per_frame;
> + }
> +
> + if (param->rateControlMode) {
> + param->maxQpAllowed = avctx->qmax;
> + param->minQpAllowed = avctx->qmin;
> + }
> +
> + param->intraRefreshType =
> + !!(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) + 1;
> +
> + // is it repeat headers for MP4 or Annex-b
> + if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
> + param->codeVpsSpsPps = 0;
> + else
> + param->codeVpsSpsPps = 1;
> +
> + param->codeEosNal = 1;
> +
> + if (svt_enc->hdr) {
> + av_log(avctx, AV_LOG_WARNING, "Color properties not
> supported
> + yet\n");
> +
> + svt_enc->vui_info = 1;
> + param->highDynamicRangeInput = svt_enc->hdr;
> + }
> +
> + if (svt_enc->vui_info)
> + param->videoUsabilityInfo = svt_enc->vui_info;
> +
> + if (svt_enc->la_depth != -1)
Though the option la_depth is limited to [-1, 256], still would be better to be
la_dapth >= 0.
> + param->lookAheadDistance = svt_enc->la_depth;
> +
> + ret = alloc_buffer(param, svt_enc);
> +
> + return ret;
> +}
> +
> +static void read_in_data(EB_H265_ENC_CONFIGURATION *config,
> + const AVFrame *frame,
> + EB_BUFFERHEADERTYPE *header_ptr) {
> + uint8_t is16bit = config->encoderBitDepth > 8;
> + uint64_t luma_size =
> + (uint64_t)config->sourceWidth * config->sourceHeight<< is16bit;
> + EB_H265_ENC_INPUT *in_data = (EB_H265_ENC_INPUT
> +*)header_ptr->pBuffer;
> +
> + // support yuv420p and yuv420p010
Probably you can give an assert here. Comment for limited format can't avoid
any run-time issue.
> + in_data->luma = frame->data[0];
> + in_data->cb = frame->data[1];
> + in_data->cr = frame->data[2];
> +
> + // stride info
> + in_data->yStride = frame->linesize[0] >> is16bit;
> + in_data->cbStride = frame->linesize[1] >> is16bit;
> + in_data->crStride = frame->linesize[2] >> is16bit;
> +
> + header_ptr->nFilledLen += luma_size * 3/2u;
> +}
> +
> +static av_cold int eb_enc_init(AVCodecContext *avctx) {
> + SvtContext *svt_enc = avctx->priv_data;
> + EB_ERRORTYPE svt_ret;
> +
> + svt_enc->eos_flag = EOS_NOT_REACHED;
> +
> + svt_ret = EbInitHandle(&svt_enc->svt_handle, svt_enc,
> &svt_enc->enc_params);
> + if (svt_ret != EB_ErrorNone) {
> + av_log(avctx, AV_LOG_ERROR, "Error init encoder handle\n");
> + goto failed;
> + }
> +
> + svt_ret = config_enc_params(&svt_enc->enc_params, avctx);
> + if (svt_ret != EB_ErrorNone) {
> + av_log(avctx, AV_LOG_ERROR, "Error configure encoder
> parameters\n");
> + goto failed_init_handle;
> + }
> +
> + svt_ret = EbH265EncSetParameter(svt_enc->svt_handle,
> &svt_enc->enc_params);
> + if (svt_ret != EB_ErrorNone) {
> + av_log(avctx, AV_LOG_ERROR, "Error setting encoder
> parameters\n");
> + goto failed_init_handle;
> + }
> +
> + svt_ret = EbInitEncoder(svt_enc->svt_handle);
> + if (svt_ret != EB_ErrorNone) {
> + av_log(avctx, AV_LOG_ERROR, "Error init encoder\n");
> + goto failed_init_handle;
> + }
> +
> + if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
> + EB_BUFFERHEADERTYPE *header_ptr = NULL;
> +
> + svt_ret = EbH265EncStreamHeader(svt_enc->svt_handle,
> &header_ptr);
> + if (svt_ret != EB_ErrorNone) {
> + av_log(avctx, AV_LOG_ERROR, "Error when build stream
> header.\n");
> + goto failed_init_enc;
> + }
> +
> + avctx->extradata_size = header_ptr->nFilledLen;
> + avctx->extradata = av_mallocz(avctx->extradata_size +
> AV_INPUT_BUFFER_PADDING_SIZE);
The PADDING memory should be memset to zero.
> + if (!avctx->extradata) {
> + av_log(avctx, AV_LOG_ERROR,
> + "Cannot allocate HEVC header of size %d.\n",
> avctx->extradata_size);
> + svt_ret = EB_ErrorInsufficientResources;
> + goto failed_init_enc;
> + }
> + memcpy(avctx->extradata, header_ptr->pBuffer,
> avctx->extradata_size);
> + }
> +
> + return 0;
> +
> +failed_init_enc:
> + EbDeinitEncoder(svt_enc->svt_handle);
> +failed_init_handle:
> + EbDeinitHandle(svt_enc->svt_handle);
> +failed:
> + free_buffer(svt_enc);
> + svt_enc->svt_handle = NULL;
> + svt_enc = NULL;
> + return error_mapping(svt_ret);
> +}
> +
> +static int eb_send_frame(AVCodecContext *avctx, const AVFrame *frame) {
> + SvtContext *svt_enc = avctx->priv_data;
> + EB_BUFFERHEADERTYPE *header_ptr = &svt_enc->in_buf;
> +
> + if (!frame) {
> + EB_BUFFERHEADERTYPE header_ptr_last;
> + header_ptr_last.nAllocLen = 0;
> + header_ptr_last.nFilledLen = 0;
> + header_ptr_last.nTickCount = 0;
> + header_ptr_last.pAppPrivate = NULL;
> + header_ptr_last.pBuffer = NULL;
> + header_ptr_last.nFlags = EB_BUFFERFLAG_EOS;
> +
> + EbH265EncSendPicture(svt_enc->svt_handle, &header_ptr_last);
> + svt_enc->eos_flag = EOS_REACHED;
> + av_log(avctx, AV_LOG_DEBUG, "Finish sending frames!!!\n");
> + return 0;
> + }
> +
> + read_in_data(&svt_enc->enc_params, frame, header_ptr);
> +
> + header_ptr->nFlags = 0;
> + header_ptr->pAppPrivate = NULL;
> + header_ptr->pts = frame->pts;
> + switch (frame->pict_type) {
> + case AV_PICTURE_TYPE_I:
> + header_ptr->sliceType = svt_enc->forced_idr > 0 ?
> EB_IDR_PICTURE : EB_I_PICTURE;
> + break;
> + case AV_PICTURE_TYPE_P:
> + header_ptr->sliceType = EB_P_PICTURE;
> + break;
> + case AV_PICTURE_TYPE_B:
> + header_ptr->sliceType = EB_B_PICTURE;
> + break;
> + default:
> + header_ptr->sliceType = EB_INVALID_PICTURE;
> + break;
> + }
> + EbH265EncSendPicture(svt_enc->svt_handle, header_ptr);
> +
> + return 0;
> +}
> +
> +static int eb_receive_packet(AVCodecContext *avctx, AVPacket *pkt) {
> + SvtContext *svt_enc = avctx->priv_data;
> + EB_BUFFERHEADERTYPE *header_ptr = NULL;
> + EB_ERRORTYPE svt_ret;
> + int ret = 0;
> +
> + if (EOS_TOTRIGGER == svt_enc->eos_flag) {
> + pkt = NULL;
> + return AVERROR_EOF;
> + }
> +
> + svt_ret = EbH265GetPacket(svt_enc->svt_handle, &header_ptr,
> svt_enc->eos_flag);
> + if (svt_ret == EB_NoErrorEmptyQueue)
> + return AVERROR(EAGAIN);
> +
> + if ((ret = ff_alloc_packet2(avctx, pkt, header_ptr->nFilledLen, 0)) < 0)
> {
> + av_log(avctx, AV_LOG_ERROR, "Failed to allocate output
> packet.\n");
> + EbH265ReleaseOutBuffer(&header_ptr);
> + return ret;
> + }
> +
> + memcpy(pkt->data, header_ptr->pBuffer, header_ptr->nFilledLen);
> +
> + pkt->size = header_ptr->nFilledLen;
> + pkt->pts = header_ptr->pts;
> + pkt->dts = header_ptr->dts;
> + if ((header_ptr->sliceType == EB_IDR_PICTURE) ||
> + (header_ptr->sliceType == EB_I_PICTURE))
> + pkt->flags |= AV_PKT_FLAG_KEY;
> + if (header_ptr->sliceType == EB_NON_REF_PICTURE)
> + pkt->flags |= AV_PKT_FLAG_DISPOSABLE;
> +
> + EbH265ReleaseOutBuffer(&header_ptr);
> +
> + if (EB_BUFFERFLAG_EOS == header_ptr->nFlags)
> + svt_enc->eos_flag = EOS_TOTRIGGER;
> +
> + return 0;
> +}
> +
> +static av_cold int eb_enc_close(AVCodecContext *avctx) {
> + SvtContext *svt_enc = avctx->priv_data;
> +
> + if (svt_enc) {
> + if (svt_enc->svt_handle) {
> + EbDeinitEncoder(svt_enc->svt_handle);
> + EbDeinitHandle(svt_enc->svt_handle);
> + svt_enc->svt_handle = NULL;
> + }
> +
> + free_buffer(svt_enc);
> + svt_enc = NULL;
> + }
> +
> + return 0;
> +}
> +
> +#define OFFSET(x) offsetof(SvtContext, x) #define VE
> +AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM static
> const
> +AVOption options[] = {
> + { "vui", "Enable Video Usability Info", OFFSET(vui_info),
> + AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
> +
> + { "aud", "Include Access Unit Delimiter", OFFSET(aud),
> + AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
> +
> + { "hielevel", "Hierarchical prediction levels setting",
> OFFSET(hierarchical_level),
> + AV_OPT_TYPE_INT, { .i64 = 4 }, 1, 4, VE , "hielevel"},
> + { "flat", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 },
> INT_MIN, INT_MAX, VE, "hielevel" },
> + { "2level", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN,
> INT_MAX, VE, "hielevel" },
> + { "3level", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN,
> INT_MAX, VE, "hielevel" },
> + { "4level", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 4 },
> INT_MIN,
> + INT_MAX, VE, "hielevel" },
> +
> + { "la_depth", "Look ahead distance [0, 256]", OFFSET(la_depth),
> + AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 256, VE },
> +
> + { "preset", "Encoding preset [0, 12] (e,g, for subjective quality tuning
> mode and >=4k resolution), [0, 10] (for >= 1080p resolution), [0, 9] (for all
> resolution and modes)",
> + OFFSET(enc_mode), AV_OPT_TYPE_INT, { .i64 = 9 }, 0, 12, VE },
> +
> + { "profile", "Profile setting, Main Still Picture Profile not supported",
> OFFSET(profile),
> + AV_OPT_TYPE_INT, { .i64 = FF_PROFILE_HEVC_MAIN_10 },
I am quite surprised why you set main10 as default profile.
You added a debug message for 10bit input, but not added for 8bit case, doesn't
mean 8bit case is more common?
> + FF_PROFILE_HEVC_MAIN, FF_PROFILE_HEVC_MAIN_10, VE, "profile"},
> +
> + { "tier", "Set tier (general_tier_flag)", OFFSET(tier),
> + AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE, "tier" },
> + { "main", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, VE,
> "tier" },
> + { "high", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, VE,
> + "tier" },
> +
> + { "level", "Set level (level_idc)", OFFSET(level),
> + AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xff, VE, "level" },
> +
> + { "rc", "Bit rate control mode", OFFSET(rc_mode),
> + AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE , "rc"},
> + { "cqp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN,
> INT_MAX, VE, "rc" },
> + { "vbr", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN,
> + INT_MAX, VE, "rc" },
Hm. VBR mode can be support but I haven't seen any parameter to set
max_rate/vbv buffer.
Does this mean the bitrate fluctuation is totally out of control？
> + { "qp", "QP value for intra frames", OFFSET(qp),
> + AV_OPT_TYPE_INT, { .i64 = 32 }, 0, 51, VE },
> +
> + { "sc_detection", "Scene change detection", OFFSET(scd),
> + AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
> +
> + { "tune", "Quality tuning mode", OFFSET(tune), AV_OPT_TYPE_INT,
> { .i64 = 1 }, 0, 2, VE, "tune" },
> + { "sq", "Visually optimized mode", 0,
> + AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE,
> "tune" },
> + { "oq", "PSNR / SSIM optimized mode", 0,
> + AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE,
> "tune" },
> + { "vmaf", "VMAF optimized mode", 0,
> + AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE,
> + "tune" },
> +
> + { "bl_mode", "Random Access Prediction Structure type setting",
> OFFSET(base_layer_switch_mode),
> + AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
> +
> + { "forced-idr", "If forcing keyframes, force them as IDR frames.",
> OFFSET(forced_idr),
> + AV_OPT_TYPE_BOOL, { .i64 = 0 }, -1, 1, VE },
> +
> + { "hdr", "High dynamic range input", OFFSET(hdr),
> + AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
> +
> + {NULL},
> +};
> +
> +static const AVClass class = {
> + .class_name = "libsvt_hevc",
> + .item_name = av_default_item_name,
> + .option = options,
> + .version = LIBAVUTIL_VERSION_INT,
> +};
> +
> +static const AVCodecDefault eb_enc_defaults[] = {
> + { "b", "7M" },
> + { "flags", "+cgop" },
> + { "qmin", "10" },
> + { "qmax", "48" },
> + { "g", "-2" },
> + { NULL },
> +};
> +
> +AVCodec ff_libsvt_hevc_encoder = {
> + .name = "libsvt_hevc",
> + .long_name = NULL_IF_CONFIG_SMALL("SVT-HEVC(Scalable
> Video Technology for HEVC) encoder"),
> + .priv_data_size = sizeof(SvtContext),
> + .type = AVMEDIA_TYPE_VIDEO,
> + .id = AV_CODEC_ID_HEVC,
> + .init = eb_enc_init,
> + .send_frame = eb_send_frame,
> + .receive_packet = eb_receive_packet,
> + .close = eb_enc_close,
> + .capabilities = AV_CODEC_CAP_DELAY |
> AV_CODEC_CAP_AUTO_THREADS,
> + .pix_fmts = (const enum
> AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
> +
> AV_PIX_FMT_YUV420P10,
> +
> AV_PIX_FMT_NONE },
> + .priv_class = &class,
> + .defaults = eb_enc_defaults,
> + .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
> + .wrapper_name = "libsvt_hevc",
> +};
> --
> 1.8.3.1
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