[FFmpeg-devel] [FFmpeg-devel v10 6/9] Provided support for EVC decoder
Dawid Kozinski
d.kozinski at samsung.com
Thu Aug 25 16:35:22 EEST 2022
- Added EVC decoder wrapper
- Changes in project configuration file and libavcodec Makefile
- Added documentation for xevd wrapper
Signed-off-by: Dawid Kozinski <d.kozinski at samsung.com>
---
configure | 4 +
doc/decoders.texi | 24 +++
doc/general_contents.texi | 10 +-
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/libxevd.c | 422 ++++++++++++++++++++++++++++++++++++++
6 files changed, 461 insertions(+), 1 deletion(-)
create mode 100644 libavcodec/libxevd.c
diff --git a/configure b/configure
index 8fe8bc0d49..b191d2d9db 100755
--- a/configure
+++ b/configure
@@ -292,6 +292,7 @@ External library support:
--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-libxevd enable EVC decoding via libxevd [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]
@@ -1876,6 +1877,7 @@ EXTERNAL_LIBRARY_LIST="
libvorbis
libvpx
libwebp
+ libxevd
libxeve
libxml2
libzimg
@@ -3400,6 +3402,7 @@ libx264rgb_encoder_select="libx264_encoder"
libx265_encoder_deps="libx265"
libxavs_encoder_deps="libxavs"
libxavs2_encoder_deps="libxavs2"
+libxevd_decoder_deps="libxevd"
libxeve_encoder_deps="libxeve"
libxvid_encoder_deps="libxvid"
libzvbi_teletext_decoder_deps="libzvbi"
@@ -6722,6 +6725,7 @@ enabled libx265 && require_pkg_config libx265 x265 x265.h x265_api_get
require_cpp_condition libx265 x265.h "X265_BUILD >= 70"
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 libxevd && require_pkg_config libxevd "xevd >= 0.4.0" "xevd.h" xevd_decode
enabled libxeve && require_pkg_config libxeve "xeve >= 0.4.0" "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
diff --git a/doc/decoders.texi b/doc/decoders.texi
index e2fcbf5dc9..0bd9096114 100644
--- a/doc/decoders.texi
+++ b/doc/decoders.texi
@@ -126,6 +126,30 @@ Set amount of frame threads to use during decoding. The default value is 0 (auto
@end table
+ at section libxevd
+
+eXtra-fast Essential Video Decoder (XEVD) MPEG-5 EVC decoder wrapper.
+
+This decoder requires the presence of the libxevd headers and library
+during configuration. You need to explicitly configure the build with
+ at option{--enable-libxevd}.
+
+The xevd project website is at @url{https://github.com/mpeg5/xevd}.
+
+ at subsection Options
+
+The following options are supported by the libxevd wrapper.
+The xevd-equivalent options or values are listed in parentheses for easy migration.
+
+To get a more accurate and extensive documentation of the libxevd options,
+invoke the command @code{xevd_app --help} or consult the libxevd documentation.
+
+ at table @option
+ at item threads (@emph{threads})
+Force to use a specific number of threads
+
+ at end table
+
@section QSV Decoders
The family of Intel QuickSync Video decoders (VC1, MPEG-2, H.264, HEVC,
diff --git a/doc/general_contents.texi b/doc/general_contents.texi
index 3fb4aeb206..89236047ea 100644
--- a/doc/general_contents.texi
+++ b/doc/general_contents.texi
@@ -351,6 +351,14 @@ 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.
+ at section eXtra-fast Essential Video Decoder (XEVD)
+
+FFmpeg can make use of the XEVD library for EVC video decoding.
+
+Go to @url{https://github.com/mpeg5/xevd} and follow the instructions for
+installing the XEVD library. Then pass @code{--enable-libxevd} to configure to
+enable it.
+
@section ZVBI
ZVBI is a VBI decoding library which can be used by FFmpeg to decode DVB
@@ -940,7 +948,7 @@ following image formats are supported:
@item Escape 124 @tab @tab X
@item Escape 130 @tab @tab X
@item EVC / MPEG-5 Part 1 @tab X @tab X
- @tab encoding supported through external library libxeve
+ @tab encoding and decoding supported through external libraries libxeve and libxevd
@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 24e58c77b4..ea9566b20c 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1102,6 +1102,7 @@ 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_LIBXEVD_DECODER) += libxevd.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 4f9c0b5e63..fc2882c7fd 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -803,6 +803,7 @@ extern LIBX264_CONST FFCodec ff_libx264_encoder;
extern const FFCodec ff_libx264rgb_encoder;
extern FFCodec ff_libx265_encoder;
extern const FFCodec ff_libxeve_encoder;
+extern const FFCodec ff_libxevd_decoder;
extern const FFCodec ff_libxavs_encoder;
extern const FFCodec ff_libxavs2_encoder;
extern const FFCodec ff_libxvid_encoder;
diff --git a/libavcodec/libxevd.c b/libavcodec/libxevd.c
new file mode 100644
index 0000000000..cddbfbcb1c
--- /dev/null
+++ b/libavcodec/libxevd.c
@@ -0,0 +1,422 @@
+/*
+ * libxevd decoder
+ * EVC (MPEG-5 Essential Video Coding) decoding using XEVD MPEG-5 EVC decoder 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 <xevd.h>
+
+#include "libavutil/internal.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/cpu.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "packet_internal.h"
+#include "codec_internal.h"
+#include "profiles.h"
+
+#define XEVD_PARAM_BAD_NAME -1
+#define XEVD_PARAM_BAD_VALUE -2
+
+#define EVC_NAL_HEADER_SIZE 2 /* byte */
+
+/**
+ * The structure stores all the states associated with the instance of Xeve MPEG-5 EVC decoder
+ */
+typedef struct XevdContext {
+ const AVClass *class;
+
+ XEVD id; // XEVD instance identifier @see xevd.h
+ XEVD_CDSC cdsc; // decoding parameters @see xevd.h
+} XevdContext;
+
+/**
+ * The function populates the XEVD_CDSC structure.
+ * XEVD_CDSC contains all decoder parameters that should be initialized before its use.
+ *
+ * @param[in] avctx codec context
+ * @param[out] cdsc contains all decoder parameters that should be initialized before its use
+ *
+ */
+static void get_conf(AVCodecContext *avctx, XEVD_CDSC *cdsc)
+{
+ int cpu_count = av_cpu_count();
+
+ /* clear XEVS_CDSC structure */
+ memset(cdsc, 0, sizeof(XEVD_CDSC));
+
+ /* init XEVD_CDSC */
+ if (avctx->thread_count <= 0)
+ cdsc->threads = (cpu_count < XEVD_MAX_TASK_CNT) ? cpu_count : XEVD_MAX_TASK_CNT;
+ else if (avctx->thread_count > XEVD_MAX_TASK_CNT)
+ cdsc->threads = XEVD_MAX_TASK_CNT;
+ else
+ cdsc->threads = avctx->thread_count;
+}
+
+/**
+ * Read NAL unit length
+ * @param bs input data (bitstream)
+ * @return the length of NAL unit on success, 0 value on failure
+ */
+static uint32_t read_nal_unit_length(const uint8_t *bs, int bs_size, AVCodecContext *avctx)
+{
+ uint32_t len = 0;
+ XEVD_INFO info;
+ int ret;
+
+ if (bs_size == XEVD_NAL_UNIT_LENGTH_BYTE) {
+ ret = xevd_info((void *)bs, XEVD_NAL_UNIT_LENGTH_BYTE, 1, &info);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot get bitstream information\n");
+ return 0;
+ }
+ len = info.nalu_len;
+ if (len == 0) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid bitstream size! [%d]\n", bs_size);
+ return 0;
+ }
+ }
+
+ return len;
+}
+
+/**
+ * @param[in] xectx the structure that stores all the state associated with the instance of Xeve MPEG-5 EVC decoder
+ * @param[out] avctx codec context
+ * @return 0 on success, negative value on failure
+ */
+static int export_stream_params(const XevdContext *xectx, AVCodecContext *avctx)
+{
+ int ret;
+ int size;
+ int color_space;
+
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
+
+ size = 4;
+ ret = xevd_config(xectx->id, XEVD_CFG_GET_CODED_WIDTH, &avctx->coded_width, &size);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to get coded_width\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ ret = xevd_config(xectx->id, XEVD_CFG_GET_CODED_HEIGHT, &avctx->coded_height, &size);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to get coded_height\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ ret = xevd_config(xectx->id, XEVD_CFG_GET_WIDTH, &avctx->width, &size);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to get width\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ ret = xevd_config(xectx->id, XEVD_CFG_GET_HEIGHT, &avctx->height, &size);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to get height\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ ret = xevd_config(xectx->id, XEVD_CFG_GET_COLOR_SPACE, &color_space, &size);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to get color_space\n");
+ return AVERROR_EXTERNAL;
+ }
+ switch(color_space) {
+ case XEVD_CS_YCBCR400_10LE:
+ avctx->pix_fmt = AV_PIX_FMT_GRAY10LE;
+ break;
+ case XEVD_CS_YCBCR420_10LE:
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE;
+ break;
+ case XEVD_CS_YCBCR422_10LE:
+ avctx->pix_fmt = AV_PIX_FMT_YUV422P10LE;
+ break;
+ case XEVD_CS_YCBCR444_10LE:
+ avctx->pix_fmt = AV_PIX_FMT_YUV444P10LE;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Unknown color space\n");
+ avctx->pix_fmt = AV_PIX_FMT_NONE;
+ return AVERROR_INVALIDDATA;
+ }
+
+ // the function returns sps->num_reorder_pics
+ ret = xevd_config(xectx->id, XEVD_CFG_GET_MAX_CODING_DELAY, &avctx->max_b_frames, &size);
+ if (XEVD_FAILED(ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to get max_coding_delay\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ avctx->has_b_frames = (avctx->max_b_frames) ? 1 : 0;
+
+ avctx->color_primaries = AVCOL_PRI_UNSPECIFIED;
+ avctx->color_trc = AVCOL_TRC_UNSPECIFIED;
+ avctx->colorspace = AVCOL_SPC_UNSPECIFIED;
+
+ return 0;
+}
+
+/**
+ * @brief Copy image in imgb to frame.
+ *
+ * @param avctx codec context
+ * @param[in] imgb
+ * @param[out] frame
+ * @return 0 on success, negative value on failure
+ */
+static int libxevd_image_copy(struct AVCodecContext *avctx, XEVD_IMGB *imgb, struct AVFrame *frame)
+{
+ int ret;
+ if (imgb->cs != XEVD_CS_YCBCR420_10LE) {
+ av_log(avctx, AV_LOG_ERROR, "Not supported pixel format: %s\n", av_get_pix_fmt_name(avctx->pix_fmt));
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (imgb->w[0] != avctx->width || imgb->h[0] != avctx->height) { // stream resolution changed
+ if (ff_set_dimensions(avctx, imgb->w[0], imgb->h[0]) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot set new dimension\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ if (ret = ff_get_buffer(avctx, frame, 0) < 0) {
+ return ret;
+ }
+
+ av_image_copy(frame->data, frame->linesize, (const uint8_t **)imgb->a,
+ imgb->s, avctx->pix_fmt,
+ imgb->w[0], imgb->h[0]);
+
+ return 0;
+}
+
+/**
+ * Initialize decoder
+ * Create a decoder instance and allocate all the needed resources
+ *
+ * @param avctx codec context
+ * @return 0 on success, negative error code on failure
+ */
+static av_cold int libxevd_init(AVCodecContext *avctx)
+{
+ XevdContext *xectx = avctx->priv_data;
+ XEVD_CDSC *cdsc = &(xectx->cdsc);
+
+ /* read configurations and set values for created descriptor (XEVD_CDSC) */
+ get_conf(avctx, cdsc);
+
+ /* create decoder */
+ xectx->id = xevd_create(&(xectx->cdsc), NULL);
+ if (xectx->id == NULL) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot create XEVD encoder\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ return 0;
+}
+
+/**
+ * Decode picture
+ *
+ * @param avctx codec context
+ * @param[out] frame decoded frame
+ * @param[out] got_frame_ptr decoder sets to 0 or 1 to indicate that a
+ * non-empty frame or subtitle was returned in
+ * outdata.
+ * @param[in] avpkt AVPacket containing encoded data to be decoded
+ *
+ * @return amount of bytes read from the packet on success, negative error
+ * code on failure
+ */
+static int libxevd_decode(struct AVCodecContext *avctx, struct AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
+{
+ XevdContext *xectx = NULL;
+ XEVD_IMGB *imgb = NULL;
+ XEVD_STAT stat;
+ XEVD_BITB bitb;
+ int xevd_ret, nalu_size, bs_read_pos;
+ int ret = 0;
+
+ xectx = avctx->priv_data;
+
+ if (avpkt->size > 0) {
+ bs_read_pos = 0;
+ imgb = NULL;
+ while(avpkt->size > (bs_read_pos + XEVD_NAL_UNIT_LENGTH_BYTE)) {
+ memset(&stat, 0, sizeof(XEVD_STAT));
+ memset(&bitb, 0, sizeof(XEVD_BITB));
+
+ nalu_size = read_nal_unit_length(avpkt->data + bs_read_pos, XEVD_NAL_UNIT_LENGTH_BYTE, avctx);
+ if (nalu_size == 0) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid bitstream\n");
+ ret = AVERROR_INVALIDDATA;
+ goto ERR;
+ }
+ bs_read_pos += XEVD_NAL_UNIT_LENGTH_BYTE;
+
+ bitb.addr = avpkt->data + bs_read_pos;
+ bitb.ssize = nalu_size;
+
+ /* main decoding block */
+ xevd_ret = xevd_decode(xectx->id, &bitb, &stat);
+ if (XEVD_FAILED(xevd_ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to decode bitstream\n");
+ ret = AVERROR_EXTERNAL;
+ goto ERR;
+ }
+
+ bs_read_pos += nalu_size;
+
+ if (stat.nalu_type == XEVD_NUT_SPS) { // EVC stream parameters changed
+ if ((ret = export_stream_params(xectx, avctx)) != 0)
+ goto ERR;
+ }
+
+ if (stat.read != nalu_size)
+ av_log(avctx, AV_LOG_INFO, "Different reading of bitstream (in:%d, read:%d)\n,", nalu_size, stat.read);
+ if (stat.fnum >= 0) {
+ // already has a decoded image
+ if (imgb) {
+ // xevd_pull uses pool of objects of type XEVD_IMGB.
+ // The pool size is equal MAX_PB_SIZE (26), so release object when it is no more needed
+ imgb->release(imgb);
+ imgb = NULL;
+ }
+ xevd_ret = xevd_pull(xectx->id, &imgb);
+ if (XEVD_FAILED(xevd_ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to pull the decoded image (xevd error code: %d, frame#=%d)\n", xevd_ret, stat.fnum);
+ ret = AVERROR_EXTERNAL;
+ goto ERR;
+ } else if (xevd_ret == XEVD_OK_FRM_DELAYED) {
+ if (imgb) {
+ // xevd_pull uses pool of objects of type XEVD_IMGB.
+ // The pool size is equal MAX_PB_SIZE (26), so release object when it is no more needed
+ imgb->release(imgb);
+ imgb = NULL;
+ }
+ }
+ if (imgb) {
+ int ret = libxevd_image_copy(avctx, imgb, frame);
+ if(ret < 0) {
+ goto ERR;
+ }
+
+ frame->pts = avpkt->pts;
+ *got_frame_ptr = 1;
+
+ // xevd_pull uses pool of objects of type XEVD_IMGB.
+ // The pool size is equal MAX_PB_SIZE (26), so release object when it is no more needed
+ imgb->release(imgb);
+ imgb = NULL;
+ } else
+ *got_frame_ptr = 0;
+ }
+ }
+ } else { // bumping
+ xevd_ret = xevd_pull(xectx->id, &(imgb));
+ if (xevd_ret == XEVD_ERR_UNEXPECTED) { // bumping process completed
+ *got_frame_ptr = 0;
+ return 0;
+ } else if (XEVD_FAILED(xevd_ret)) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to pull the decoded image (xevd error code: %d)\n", xevd_ret);
+ ret = AVERROR_EXTERNAL;
+ goto ERR;
+ }
+ if (imgb) {
+ int ret = libxevd_image_copy(avctx, imgb, frame);
+ if(ret < 0) {
+ goto ERR;
+ }
+
+ frame->pts = avpkt->pts;
+ *got_frame_ptr = 1;
+
+ // xevd_pull uses pool of objects of type XEVD_IMGB.
+ // The pool size is equal MAX_PB_SIZE (26), so release object when it is no more needed
+ imgb->release(imgb);
+ imgb = NULL;
+ } else
+ *got_frame_ptr = 0;
+ }
+
+ return avpkt->size;
+
+ERR:
+ if (imgb) {
+ imgb->release(imgb);
+ imgb = NULL;
+ }
+ *got_frame_ptr = 0;
+
+ return ret;
+}
+
+/**
+ * Destroy decoder
+ *
+ * @param avctx codec context
+ * @return 0 on success
+ */
+static av_cold int libxevd_close(AVCodecContext *avctx)
+{
+ XevdContext *xectx = avctx->priv_data;
+ if (xectx->id) {
+ xevd_delete(xectx->id);
+ xectx->id = NULL;
+ }
+
+ return 0;
+}
+
+#define OFFSET(x) offsetof(XevdContext, x)
+#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+
+static const AVClass libxevd_class = {
+ .class_name = "libxevd",
+ .item_name = av_default_item_name,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+const FFCodec ff_libxevd_decoder = {
+ .p.name = "evc",
+ .p.long_name = NULL_IF_CONFIG_SMALL("EVC / MPEG-5 Essential Video Coding (EVC)"),
+ .p.type = AVMEDIA_TYPE_VIDEO,
+ .p.id = AV_CODEC_ID_EVC,
+ .init = libxevd_init,
+ FF_CODEC_DECODE_CB(libxevd_decode),
+ .close = libxevd_close,
+ .priv_data_size = sizeof(XevdContext),
+ .p.priv_class = &libxevd_class,
+ .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_AVOID_PROBING | AV_CODEC_CAP_DR1,
+ .p.profiles = NULL_IF_CONFIG_SMALL(ff_evc_profiles),
+ .p.wrapper_name = "libxevd",
+ .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_NOT_INIT_THREADSAFE,
+};
--
2.17.1
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