[FFmpeg-devel] [PATCH v26 4/9] avcodec/evc_encoder: Provided support for EVC encoder
Dawid Kozinski
d.kozinski at samsung.com
Thu Jun 15 14:47:46 EEST 2023
- Added EVC encoder wrapper
- Changes in project configuration file and libavcodec Makefile
- Added documentation for xeve wrapper
Signed-off-by: Dawid Kozinski <d.kozinski at samsung.com>
---
configure | 4 +
doc/encoders.texi | 69 +++++
doc/general_contents.texi | 11 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/libxeve.c | 616 ++++++++++++++++++++++++++++++++++++++
6 files changed, 702 insertions(+)
create mode 100644 libavcodec/libxeve.c
diff --git a/configure b/configure
index c9a86e9f8e..e2370a23bb 100755
--- a/configure
+++ b/configure
@@ -292,6 +292,7 @@ External library support:
--enable-libwebp enable WebP encoding via libwebp [no]
--enable-libx264 enable H.264 encoding via x264 [no]
--enable-libx265 enable HEVC encoding via x265 [no]
+ --enable-libxeve enable EVC encoding via libxeve [no]
--enable-libxavs enable AVS encoding via xavs [no]
--enable-libxavs2 enable AVS2 encoding via xavs2 [no]
--enable-libxcb enable X11 grabbing using XCB [autodetect]
@@ -1903,6 +1904,7 @@ EXTERNAL_LIBRARY_LIST="
libvorbis
libvpx
libwebp
+ libxeve
libxml2
libzimg
libzmq
@@ -3458,6 +3460,7 @@ libx265_encoder_deps="libx265"
libx265_encoder_select="atsc_a53"
libxavs_encoder_deps="libxavs"
libxavs2_encoder_deps="libxavs2"
+libxeve_encoder_deps="libxeve"
libxvid_encoder_deps="libxvid"
libzvbi_teletext_decoder_deps="libzvbi"
vapoursynth_demuxer_deps="vapoursynth"
@@ -6832,6 +6835,7 @@ enabled libx265 && require_pkg_config libx265 x265 x265.h x265_api_get
require_cpp_condition libx265 x265.h "X265_BUILD >= 89"
enabled libxavs && require libxavs "stdint.h xavs.h" xavs_encoder_encode "-lxavs $pthreads_extralibs $libm_extralibs"
enabled libxavs2 && require_pkg_config libxavs2 "xavs2 >= 1.3.0" "stdint.h xavs2.h" xavs2_api_get
+enabled libxeve && require_pkg_config libxeve "xeve >= 0.4.3" "xeve.h" xeve_encode
enabled libxvid && require libxvid xvid.h xvid_global -lxvidcore
enabled libzimg && require_pkg_config libzimg "zimg >= 2.7.0" zimg.h zimg_get_api_version
enabled libzmq && require_pkg_config libzmq "libzmq >= 4.2.1" zmq.h zmq_ctx_new
diff --git a/doc/encoders.texi b/doc/encoders.texi
index 20cb8a1421..4b560dd918 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -2890,6 +2890,75 @@ ffmpeg -i input -c:v libxavs2 -xavs2-params RdoqLevel=0 output.avs2
@end example
@end table
+ at section libxeve
+
+eXtra-fast Essential Video Encoder (XEVE) MPEG-5 EVC encoder wrapper.
+The xeve-equivalent options or values are listed in parentheses for easy migration.
+
+This encoder requires the presence of the libxeve headers and library
+during configuration. You need to explicitly configure the build with
+ at option{--enable-libxeve}.
+
+ at float NOTE
+Many libxeve encoder options are mapped to FFmpeg global codec options,
+while unique encoder options are provided through private options.
+Additionally the xeve-params private options allows one to pass a list
+of key=value tuples as accepted by the libxeve @code{parse_xeve_params} function.
+ at end float
+
+The xeve project website is at @url{https://github.com/mpeg5/xeve}.
+
+ at subsection Options
+
+The following options are supported by the libxeve wrapper.
+The xeve-equivalent options or values are listed in parentheses for easy migration.
+
+ at float NOTE
+To reduce the duplication of documentation, only the private options
+and some others requiring special attention are documented here. For
+the documentation of the undocumented generic options, see
+ at ref{codec-options,,the Codec Options chapter}.
+ at end float
+
+ at float NOTE
+To get a more accurate and extensive documentation of the libxeve options,
+invoke the command @code{xeve_app --help} or consult the libxeve documentation.
+ at end float
+
+ at table @option
+ at item b (@emph{bitrate})
+Set target video bitrate in bits/s.
+Note that FFmpeg's b option is expressed in bits/s, while xeve's bitrate is in kilobits/s.
+
+ at item bf (@emph{bframes})
+Set the maximum number of B frames (1,3,7,15).
+
+ at item g (@emph{keyint})
+Set the GOP size (I-picture period).
+
+ at item preset (@emph{preset})
+Set the xeve preset.
+Set the encoder preset value to determine encoding speed [fast, medium, slow, placebo]
+
+ at item tune (@emph{tune})
+Set the encoder tune parameter [psnr, zerolatency]
+
+ at item profile (@emph{profile})
+Set the encoder profile [0: baselie; 1: main]
+
+ at item crf (@emph{crf})
+Set the quality for constant quality mode.
+Constant rate factor <10..49> [default: 32]
+
+ at item qp (@emph{qp})
+Set constant quantization rate control method parameter.
+Quantization parameter qp <0..51> [default: 32]
+
+ at item threads (@emph{threads})
+Force to use a specific number of threads
+
+ at end table
+
@section libxvid
Xvid MPEG-4 Part 2 encoder wrapper.
diff --git a/doc/general_contents.texi b/doc/general_contents.texi
index 2eeebd847d..c6a997bfd6 100644
--- a/doc/general_contents.texi
+++ b/doc/general_contents.texi
@@ -343,6 +343,14 @@ libxavs2 is under the GNU Public License Version 2 or later
details), you must upgrade FFmpeg's license to GPL in order to use it.
@end float
+ at section eXtra-fast Essential Video Encoder (XEVE)
+
+FFmpeg can make use of the XEVE library for EVC video encoding.
+
+Go to @url{https://github.com/mpeg5/xeve} and follow the instructions for
+installing the XEVE library. Then pass @code{--enable-libxeve} to configure to
+enable it.
+
@section ZVBI
ZVBI is a VBI decoding library which can be used by FFmpeg to decode DVB
@@ -598,6 +606,7 @@ library:
@item raw DTS @tab X @tab X
@item raw DTS-HD @tab @tab X
@item raw E-AC-3 @tab X @tab X
+ at item raw EVC @tab X @tab X
@item raw FLAC @tab X @tab X
@item raw GSM @tab @tab X
@item raw H.261 @tab X @tab X
@@ -943,6 +952,8 @@ following image formats are supported:
@item Electronic Arts TQI video @tab @tab X
@item Escape 124 @tab @tab X
@item Escape 130 @tab @tab X
+ at item EVC / MPEG-5 Part 1 @tab X @tab X
+ @tab encoding and decoding supported through external library libxeve
@item FFmpeg video codec #1 @tab X @tab X
@tab lossless codec (fourcc: FFV1)
@item Flash Screen Video v1 @tab X @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 0ce8fe5b9c..2223e9f46c 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1142,6 +1142,7 @@ OBJS-$(CONFIG_LIBX264_ENCODER) += libx264.o
OBJS-$(CONFIG_LIBX265_ENCODER) += libx265.o
OBJS-$(CONFIG_LIBXAVS_ENCODER) += libxavs.o
OBJS-$(CONFIG_LIBXAVS2_ENCODER) += libxavs2.o
+OBJS-$(CONFIG_LIBXEVE_ENCODER) += libxeve.o
OBJS-$(CONFIG_LIBXVID_ENCODER) += libxvid.o
OBJS-$(CONFIG_LIBZVBI_TELETEXT_DECODER) += libzvbi-teletextdec.o ass.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 11c136ef59..c317dd6da3 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -818,6 +818,7 @@ extern LIBX264_CONST FFCodec ff_libx264_encoder;
#endif
extern const FFCodec ff_libx264rgb_encoder;
extern FFCodec ff_libx265_encoder;
+extern const FFCodec ff_libxeve_encoder;
extern const FFCodec ff_libxavs_encoder;
extern const FFCodec ff_libxavs2_encoder;
extern const FFCodec ff_libxvid_encoder;
diff --git a/libavcodec/libxeve.c b/libavcodec/libxeve.c
new file mode 100644
index 0000000000..c10b7de023
--- /dev/null
+++ b/libavcodec/libxeve.c
@@ -0,0 +1,616 @@
+/*
+ * libxeve encoder
+ * EVC (MPEG-5 Essential Video Coding) encoding using XEVE MPEG-5 EVC encoder library
+ *
+ * Copyright (C) 2021 Dawid Kozinski <d.kozinski at 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);
+ }
+
+ {
+ AVDictionaryEntry *en = NULL;
+ while (en = av_dict_get(xectx->xeve_params, "", en, AV_DICT_IGNORE_SUFFIX)) {
+ 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, "preset" },
+ { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_DEFAULT }, INT_MIN, INT_MAX, VE, "preset" },
+ { "fast", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_FAST }, INT_MIN, INT_MAX, VE, "preset" },
+ { "medium", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_MEDIUM }, INT_MIN, INT_MAX, VE, "preset" },
+ { "slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_SLOW }, INT_MIN, INT_MAX, VE, "preset" },
+ { "placebo", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PRESET_PLACEBO }, INT_MIN, INT_MAX, VE, "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, "tune"},
+ { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_TUNE_NONE }, INT_MIN, INT_MAX, VE, "tune" },
+ { "zerolatency", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_TUNE_ZEROLATENCY }, INT_MIN, INT_MAX, VE, "tune" },
+ { "psnr", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_TUNE_PSNR }, INT_MIN, INT_MAX, VE, "tune" },
+ { "profile", "Encoding profile", OFFSET(profile_id), AV_OPT_TYPE_INT, { .i64 = XEVE_PROFILE_BASELINE }, XEVE_PROFILE_BASELINE, XEVE_PROFILE_MAIN, VE, "profile" },
+ { "baseline", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PROFILE_BASELINE }, INT_MIN, INT_MAX, VE, "profile" },
+ { "main", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_PROFILE_MAIN }, INT_MIN, INT_MAX, VE, "profile" },
+ { "rc_mode", "Rate control mode", OFFSET(rc_mode), AV_OPT_TYPE_INT, { .i64 = XEVE_RC_CQP }, XEVE_RC_CQP, XEVE_RC_CRF, VE, "rc_mode" },
+ { "CQP", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_RC_CQP }, INT_MIN, INT_MAX, VE, "rc_mode" },
+ { "ABR", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_RC_ABR }, INT_MIN, INT_MAX, VE, "rc_mode" },
+ { "CRF", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XEVE_RC_CRF }, INT_MIN, INT_MAX, VE, "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,
+};
--
2.25.1
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