[FFmpeg-devel] [PATCH] avfilter/vf_xcam: add xcam video filter
Steven Liu
lingjiujianke at gmail.com
Thu Jul 30 12:08:42 EEST 2020
zongwave <wei.zong at intel.com> 于2020年7月30日周四 下午5:06写道：
>
> From: Yinhang Liu <yinhangx.liu at intel.com>
>
> xcam filter is a wrapper of libxcam project which supports 360 video stitching,
> automotive surround view stitching, digital video stabilization (DVS),
> Wide dynamic range (WDR), wavelet noise reduction, 3D noise reduction, etc.
>
> libxcam library optimized algorithms by AVX, GLES and Vulkan depends on
> hardware configuration to get good performance.
>
> libxcam project is hosted at https://github.com/intel/libxcam
> please refer to https://github.com/intel/libxcam/wiki/Build to build libxcam library.
>
> To enable xcam video filter, configure FFmpeg with option
> --enable-libxcam.
>
> Here are the features provided by xcam video filter:
> - stitch CPU|GLES|Vulkan stitching
> - stitchcl OpenCL stitching
> - fisheye Fisheye calibration
> - 3dnr 3D denoising
> - waveletnr Wavelet denoising
> - dvs Digital video stabilization
> - defog Fog removal
>
> Use 'ffmpeg -h filter=xcam' to get the common parameters, stitch and
> stitchcl have private parameters, use 'params=help=1' to get the private
> parameters. For more detailed test cases posted at:
> https://github.com/intel/libxcam/wiki/Tests#1-ffmpeg-xcam.
>
> Reviewed-by: Zong Wei <wei.zong at intel.com>
> +---
> + Changelog | 1 +
> + configure | 5 +
> + doc/filters.texi | 79 ++++++++++
> + libavfilter/Makefile | 1 +
> + libavfilter/allfilters.c | 1 +
> + libavfilter/vf_xcam.c | 326 +++++++++++++++++++++++++++++++++++++++
> + 6 files changed, 413 insertions(+)
> + create mode 100644 libavfilter/vf_xcam.c
> +
> +diff --git a/Changelog b/Changelog
> +index 6f648bff2b..1d5872e216 100644
> +--- a/Changelog
> ++++ b/Changelog
> +@@ -10,6 +10,7 @@ version <next>:
> + - ADPCM IMA Ubisoft APM encoder
> + - Rayman 2 APM muxer
> + - AV1 encoding support SVT-AV1
> ++- xcam filter
> +
> +
> + version 4.3:
> +diff --git a/configure b/configure
> +index 169f23e17f..7664a077b3 100755
> +--- a/configure
> ++++ b/configure
> +@@ -290,6 +290,7 @@ External library support:
> + --enable-libx265 enable HEVC encoding via x265 [no]
> + --enable-libxavs enable AVS encoding via xavs [no]
> + --enable-libxavs2 enable AVS2 encoding via xavs2 [no]
> ++ --enable-libxcam enable image processing via xcam [no]
> + --enable-libxcb enable X11 grabbing using XCB [autodetect]
> + --enable-libxcb-shm enable X11 grabbing shm communication [autodetect]
> + --enable-libxcb-xfixes enable X11 grabbing mouse rendering [autodetect]
> +@@ -1817,6 +1818,7 @@ EXTERNAL_LIBRARY_LIST="
> + libvpx
> + libwavpack
> + libwebp
> ++ libxcam
> + libxml2
> + libzimg
> + libzmq
> +@@ -3639,6 +3641,7 @@ scale_vaapi_filter_deps="vaapi"
> + scale_vulkan_filter_deps="vulkan libglslang"
> + vpp_qsv_filter_deps="libmfx"
> + vpp_qsv_filter_select="qsvvpp"
> ++xcam_filter_deps="libxcam"
> + xfade_opencl_filter_deps="opencl"
> + yadif_cuda_filter_deps="ffnvcodec"
> + yadif_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
> +@@ -6451,6 +6454,8 @@ 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 libxcam && { check_pkg_config libxcam "libxcam >= 1.4.0" "capi/xcam_handle.h" xcam_create_handle ||
> ++ die "ERROR: libXCam must be installed and version must be >= 1.4.0"; }
> + 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/filters.texi b/doc/filters.texi
> +index 561aa98a9d..ab6f231025 100644
> +--- a/doc/filters.texi
> ++++ b/doc/filters.texi
> +@@ -20399,6 +20399,85 @@ Set the scaling dimension: @code{2} for @code{2xBR}, @code{3} for
> + Default is @code{3}.
> + @end table
> +
> ++ at section xcam
> ++Image processing supported through libXCam.
> ++
What's happened? ctrl+c + ctrl+v, and forgot remove the first column?
> ++libXCam supports automotive surround view stitching, 360 video stitching,
> ++digital video stabilization, noise reduction and so on. For more information
> ++about libxcam see @url{https://github.com/intel/libxcam}.
> ++
> ++Please refer to @url{https://github.com/intel/libxcam/wiki/Build} to build
> ++libxcam.
> ++
> ++To enable compilation of @var{xcam} video filter you need to configure FFmpeg
> ++with @code{--enable-libxcam}.
> ++
> ++ at subsection Options
> ++
> ++ at table @option
> ++
> ++ at item inputs
> ++The number of inputs. Default is @code{1}. @b{stitch} and @b{stitchcl}
> ++handlers support dynamic inputs, @b{fisheye}, @b{3dnr}, @b{waveletnr},
> ++ at b{dvs} and @b{defog} handlers support one input.
> ++
> ++ at item w
> ++Output video width. Default is @code{0}.
> ++If the value is 0, the corresponding input width is used for the output.
> ++
> ++ at item h
> ++Output video height. Default is @code{0}.
> ++If the value is 0, the corresponding input height is used for the output.
> ++
> ++ at item fmt
> ++Pixel format. Default is @code{nv12}.
> ++
> ++ at table @samp
> ++ at item auto
> ++Negotiate pixel format automatically, selects the input pixel format as the
> ++processing pixel format.
> ++ at item nv12
> ++NV12 pixel format. All handlers support NV12 pixel format.
> ++ at item yuv420
> ++YUV420 pixel format. Currently, only @b{CPU} stitching supports YUV420
> ++pixel format.
> ++ at end table
> ++
> ++ at item name
> ++Handler name. Default is @code{stitch}.
> ++
> ++ at table @samp
> ++ at item stitch
> ++CPU|GLES|Vulkan stitching, supports automotive surround view stitching and
> ++360 video stitching.
> ++ at item stitchcl
> ++OpenCL stitching, supports automotive surround view stitching and 360 video
> ++stitching.
> ++ at item fisheye
> ++Fisheye calibration
> ++ at item 3dnr
> ++3D denoising
> ++ at item waveletnr
> ++Wavelet denoising
> ++ at item dvs
> ++Digital video stabilization
> ++ at item defog
> ++Fog removal
> ++ at end table
> ++
> ++ at item params
> ++Private parameters for each handler. Currently, only @b{stitch} and
> ++ at b{stitchcl} handlers have private parameters.
> ++
> ++ at end table
> ++
> ++ at subsection Examples
> ++Use @code{ffmpeg -h filter=xcam} to get the common parameters, @b{stitch}
> ++and @b{stitchcl} handlers have private parameters, use @code{params=help=1}
> ++to get the private parameters.
> ++
> ++For more examples at @url{https://github.com/intel/libxcam/wiki/Tests#1-ffmpeg-xcam}.
> ++
> + @section xfade
> +
> + Apply cross fade from one input video stream to another input video stream.
> +diff --git a/libavfilter/Makefile b/libavfilter/Makefile
> +index 0dc74f8b70..4f9acd7770 100644
> +--- a/libavfilter/Makefile
> ++++ b/libavfilter/Makefile
> +@@ -456,6 +456,7 @@ OBJS-$(CONFIG_W3FDIF_FILTER) += vf_w3fdif.o
> + OBJS-$(CONFIG_WAVEFORM_FILTER) += vf_waveform.o
> + OBJS-$(CONFIG_WEAVE_FILTER) += vf_weave.o
> + OBJS-$(CONFIG_XBR_FILTER) += vf_xbr.o
> ++OBJS-$(CONFIG_XCAM_FILTER) += vf_xcam.o
> + OBJS-$(CONFIG_XFADE_FILTER) += vf_xfade.o
> + OBJS-$(CONFIG_XFADE_OPENCL_FILTER) += vf_xfade_opencl.o opencl.o opencl/xfade.o
> + OBJS-$(CONFIG_XMEDIAN_FILTER) += vf_xmedian.o framesync.o
> +diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
> +index 3f70153986..728c11b303 100644
> +--- a/libavfilter/allfilters.c
> ++++ b/libavfilter/allfilters.c
> +@@ -435,6 +435,7 @@ extern AVFilter ff_vf_w3fdif;
> + extern AVFilter ff_vf_waveform;
> + extern AVFilter ff_vf_weave;
> + extern AVFilter ff_vf_xbr;
> ++extern AVFilter ff_vf_xcam;
> + extern AVFilter ff_vf_xfade;
> + extern AVFilter ff_vf_xfade_opencl;
> + extern AVFilter ff_vf_xmedian;
> +diff --git a/libavfilter/vf_xcam.c b/libavfilter/vf_xcam.c
> +new file mode 100644
> +index 0000000000..d3384f6f74
> +--- /dev/null
> ++++ b/libavfilter/vf_xcam.c
> +@@ -0,0 +1,326 @@
> ++/*
> ++ * Copyright (c) 2020 Intel Corporation.
> ++ *
> ++ * 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
> ++ */
> ++
> ++/**
> ++ * @file
> ++ * libXCam wrapper functions
> ++ */
> ++
> ++#include <xcam/capi/xcam_handle.h>
> ++#include "libavutil/avstring.h"
> ++#include "libavutil/opt.h"
> ++#include "framesync.h"
> ++#include "internal.h"
> ++
> ++typedef struct XCamVideoFilterBuf {
> ++ XCamVideoBuffer buf;
> ++ AVFrame *frame;
> ++} XCamVideoFilterBuf;
> ++
> ++typedef struct XCAMContext {
> ++ const AVClass *class;
> ++
> ++ int nb_inputs;
> ++ int w;
> ++ int h;
> ++ char *fmt;
> ++ char *name;
> ++ char *params;
> ++
> ++ XCamHandle *handle;
> ++ uint32_t v4l2_fmt;
> ++
> ++ XCamVideoFilterBuf **inbufs;
> ++ XCamVideoFilterBuf *outbuf;
> ++
> ++ FFFrameSync fs;
> ++} XCAMContext;
> ++
> ++static uint8_t *xcambuf_map(XCamVideoBuffer *buf)
> ++{
> ++ XCamVideoFilterBuf *avfilter_buf = (XCamVideoFilterBuf *)(buf);
> ++ return avfilter_buf->frame->data[0];
> ++}
> ++
> ++static void xcambuf_unmap(XCamVideoBuffer *buf)
> ++{
> ++ return;
> ++}
> ++
> ++static uint32_t avfmt_to_v4l2fmt(AVFilterContext *ctx, int avfmt)
> ++{
> ++ uint32_t v4l2fmt = 0;
> ++ if (avfmt == AV_PIX_FMT_YUV420P)
> ++ v4l2fmt = V4L2_PIX_FMT_YUV420;
> ++ else if (avfmt == AV_PIX_FMT_NV12)
> ++ v4l2fmt = V4L2_PIX_FMT_NV12;
> ++ else
> ++ av_log(ctx, AV_LOG_ERROR, "unsupported pixel format %d\n", avfmt);
> ++
> ++ return v4l2fmt;
> ++}
> ++
> ++static int set_parameters(AVFilterContext *ctx, const AVFilterLink *inlink, const AVFilterLink *outlink)
> ++{
> ++ XCAMContext *s = inlink->dst->priv;
> ++
> ++ char params[XCAM_MAX_PARAMS_LENGTH] = { 0 };
> ++ snprintf(params, XCAM_MAX_PARAMS_LENGTH - 1, "inw=%d inh=%d outw=%d outh=%d fmt=%d %s",
> ++ inlink->w, inlink->h, outlink->w, outlink->h, s->v4l2_fmt, s->params);
> ++
> ++ if (xcam_handle_set_parameters(s->handle, params) != XCAM_RETURN_NO_ERROR) {
> ++ av_log(ctx, AV_LOG_ERROR, "xcam handler set parameters failed\n");
> ++ return AVERROR(EINVAL);
> ++ }
> ++
> ++ return 0;
> ++}
> ++
> ++static int init_xcambuf_info(XCAMContext *s, XCamVideoBuffer *buf, AVFrame *frame)
> ++{
> ++ XCamReturn ret = xcam_video_buffer_info_reset(
> ++ &buf->info, s->v4l2_fmt, frame->width, frame->height, frame->linesize[0], frame->height, 0);
> ++ if (ret != XCAM_RETURN_NO_ERROR)
> ++ return AVERROR(EINVAL);
> ++
> ++ for (int i = 0; frame->linesize[i]; i++) {
> ++ buf->info.offsets[i] = frame->data[i] - frame->data[0];
> ++ buf->info.strides[i] = frame->linesize[i];
> ++ }
> ++
> ++ return 0;
> ++}
> ++
> ++static int xcam_execute(FFFrameSync *fs)
> ++{
> ++ AVFilterContext *ctx = fs->parent;
> ++ XCAMContext *s = fs->opaque;
> ++ AVFilterLink *outlink;
> ++ AVFrame *outframe, *frame;
> ++
> ++ XCamVideoFilterBuf **inbufs = s->inbufs;
> ++ XCamVideoFilterBuf *outbuf = s->outbuf;
> ++
> ++ for (int i = 0; i < ctx->nb_inputs; i++) {
> ++ int error = ff_framesync_get_frame(&s->fs, i, &frame, 0);
> ++ if (error < 0)
> ++ return error;
> ++ if (init_xcambuf_info(s, &inbufs[i]->buf, frame) != 0)
> ++ return AVERROR(EINVAL);
> ++ inbufs[i]->frame = frame;
> ++ }
> ++
> ++ outlink = ctx->outputs[0];
> ++ if (!(outframe = ff_get_video_buffer(outlink, outlink->w, outlink->h))) {
> ++ av_frame_free(&frame);
> ++ return AVERROR(ENOMEM);
> ++ }
> ++ outframe->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
> ++
> ++ if (init_xcambuf_info(s, &outbuf->buf, outframe) != 0)
> ++ return AVERROR(EINVAL);
> ++ outbuf->frame = outframe;
> ++
> ++ if (xcam_handle_execute(s->handle, (XCamVideoBuffer **)inbufs, (XCamVideoBuffer **)&outbuf) != XCAM_RETURN_NO_ERROR) {
> ++ av_log(ctx, AV_LOG_ERROR, "execute xcam handler failed\n");
> ++ return AVERROR(EINVAL);
> ++ }
> ++
> ++ return ff_filter_frame(outlink, outframe);
> ++}
> ++
> ++static int xcam_query_formats(AVFilterContext *ctx)
> ++{
> ++ XCAMContext *s = ctx->priv;
> ++ AVFilterFormats *formats = NULL;
> ++
> ++ static const enum AVPixelFormat nv12_fmts[] = {AV_PIX_FMT_NV12, AV_PIX_FMT_NONE};
> ++ static const enum AVPixelFormat yuv420_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};
> ++ static const enum AVPixelFormat auto_fmts[] = {AV_PIX_FMT_NV12, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};
> ++
> ++ const enum AVPixelFormat *pix_fmts = NULL;
> ++ if (!av_strcasecmp(s->fmt, "nv12"))
> ++ pix_fmts = nv12_fmts;
> ++ else if (!av_strcasecmp(s->fmt, "yuv420"))
> ++ pix_fmts = yuv420_fmts;
> ++ else
> ++ pix_fmts = auto_fmts;
> ++
> ++ if (!(formats = ff_make_format_list(pix_fmts)))
> ++ return AVERROR(ENOMEM);
> ++
> ++ return ff_set_common_formats(ctx, formats);
> ++}
> ++
> ++static int xcam_config_output(AVFilterLink *outlink)
> ++{
> ++ AVFilterContext *ctx = outlink->src;
> ++ XCAMContext *s = ctx->priv;
> ++ AVFilterLink *inlink = ctx->inputs[0];
> ++ int ret = 0;
> ++
> ++ s->v4l2_fmt = avfmt_to_v4l2fmt(ctx, inlink->format);
> ++ if (s->v4l2_fmt == 0)
> ++ return AVERROR(EINVAL);
> ++
> ++ if (s->w && s->h) {
> ++ outlink->w = s->w;
> ++ outlink->h = s->h;
> ++ } else {
> ++ outlink->w = inlink->w;
> ++ outlink->h = inlink->h;
> ++ }
> ++
> ++ set_parameters(ctx, inlink, outlink);
> ++ if (xcam_handle_init(s->handle) != XCAM_RETURN_NO_ERROR) {
> ++ av_log(ctx, AV_LOG_ERROR, "init xcam handler failed\n");
> ++ return AVERROR(EINVAL);
> ++ }
> ++
> ++ if ((ret = ff_framesync_init(&s->fs, ctx, ctx->nb_inputs)) < 0)
> ++ return ret;
> ++ s->fs.opaque = s;
> ++ s->fs.on_event = xcam_execute;
> ++ for (int i = 0; i < ctx->nb_inputs; i++) {
> ++ FFFrameSyncIn *in = &s->fs.in[i];
> ++ in->time_base = ctx->inputs[i]->time_base;
> ++ in->sync = 1;
> ++ in->before = EXT_STOP;
> ++ in->after = EXT_STOP;
> ++ }
> ++ ret = ff_framesync_configure(&s->fs);
> ++ outlink->time_base = s->fs.time_base;
> ++
> ++ return ret;
> ++}
> ++
> ++static av_cold int xcam_init(AVFilterContext *ctx)
> ++{
> ++ XCAMContext *s = ctx->priv;
> ++ int ret = 0;
> ++
> ++ s->handle = xcam_create_handle(s->name);
> ++ if (!s->handle) {
> ++ av_log(ctx, AV_LOG_ERROR, "create xcam handler failed\n");
> ++ return AVERROR(EINVAL);
> ++ }
> ++
> ++ s->inbufs = av_mallocz_array(s->nb_inputs + 1, sizeof(XCamVideoFilterBuf *));
> ++ for (int i = 0; i < s->nb_inputs; i++) {
> ++ s->inbufs[i] = av_mallocz_array(1, sizeof(XCamVideoFilterBuf));
> ++ if (!s->inbufs[i])
> ++ return AVERROR(ENOMEM);
> ++ s->inbufs[i]->buf.map = xcambuf_map;
> ++ s->inbufs[i]->buf.unmap = xcambuf_unmap;
> ++ }
> ++
> ++ s->outbuf = av_mallocz_array(1, sizeof(XCamVideoFilterBuf));
> ++ s->outbuf->buf.map = xcambuf_map;
> ++ s->outbuf->buf.unmap = xcambuf_unmap;
> ++
> ++ for (int i = 0; i < s->nb_inputs; i++) {
> ++ AVFilterPad pad = { .type = AVMEDIA_TYPE_VIDEO };
> ++ pad.name = av_asprintf("input%d", i);
> ++ if (!pad.name)
> ++ return AVERROR(ENOMEM);
> ++
> ++ if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
> ++ av_freep(&pad.name);
> ++ return ret;
> ++ }
> ++ }
> ++
> ++ return 0;
> ++}
> ++
> ++static av_cold void xcam_uninit(AVFilterContext *ctx)
> ++{
> ++ XCAMContext *s = ctx->priv;
> ++
> ++ ff_framesync_uninit(&s->fs);
> ++
> ++ for (int i = 0; i < s->nb_inputs; i++) {
> ++ if (s->inbufs && s->inbufs[i])
> ++ av_freep(&s->inbufs[i]);
> ++ if (ctx->input_pads)
> ++ av_freep(&ctx->input_pads[i].name);
> ++ }
> ++ av_freep(&s->inbufs);
> ++ av_freep(&s->outbuf);
> ++
> ++ xcam_destroy_handle(s->handle);
> ++ s->handle = NULL;
> ++}
> ++
> ++static int xcam_activate(AVFilterContext *ctx)
> ++{
> ++ XCAMContext *s = ctx->priv;
> ++ return ff_framesync_activate(&s->fs);
> ++}
> ++
> ++#define OFFSET(x) offsetof(XCAMContext, x)
> ++#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
> ++#define CONST_STRING(name, help, unit) \
> ++ { name, help, 0, AV_OPT_TYPE_CONST, { .str=name }, 0, 0, FLAGS, unit }
> ++
> ++static const AVOption xcam_options[] = {
> ++ { "inputs", "number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, XCAM_MAX_INPUTS_NUM, FLAGS },
> ++ { "w", "output width", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
> ++ { "h", "output height", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
> ++ { "fmt", "pixel format", OFFSET(fmt), AV_OPT_TYPE_STRING, { .str = "nv12" }, 0, 0, FLAGS, "fmt" },
> ++ CONST_STRING("auto", "automatic pixel format negotiation", "fmt"),
> ++ CONST_STRING("nv12", "NV12 pixel format, all handlers support NV12 pixel format", "fmt"),
> ++ CONST_STRING("yuv420", "YUV420 pixel format, only CPU stitching supports YUV420 pixel format", "fmt"),
> ++ { "name", "handler name", OFFSET(name), AV_OPT_TYPE_STRING, { .str = "stitch" }, 0, 0, FLAGS, "name" },
> ++ CONST_STRING("stitch", "CPU|GLES|Vulkan stitching", "name"),
> ++ CONST_STRING("stitchcl", "OpenCL stitching", "name"),
> ++ CONST_STRING("fisheye", "fisheye calibration", "name"),
> ++ CONST_STRING("3dnr", "3d denoising", "name"),
> ++ CONST_STRING("waveletnr", "wavelet denoising", "name"),
> ++ CONST_STRING("dvs", "digital video stabilizer", "name"),
> ++ CONST_STRING("defog", "fog removal", "name"),
> ++ { "params", "private parameters for each handle, usage: params=help=1 field0=value0 field1=value1 ...",
> ++ OFFSET(params), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, FLAGS },
> ++ { NULL }
> ++};
> ++
> ++AVFILTER_DEFINE_CLASS(xcam);
> ++
> ++static const AVFilterPad xcam_outputs[] = {
> ++ {
> ++ .name = "default",
> ++ .type = AVMEDIA_TYPE_VIDEO,
> ++ .config_props = xcam_config_output
> ++ },
> ++ { NULL }
> ++};
> ++
> ++AVFilter ff_vf_xcam = {
> ++ .name = "xcam",
> ++ .description = NULL_IF_CONFIG_SMALL("Apply image processing using libXCam"),
> ++ .priv_size = sizeof(XCAMContext),
> ++ .priv_class = &xcam_class,
> ++ .init = xcam_init,
> ++ .query_formats = xcam_query_formats,
> ++ .outputs = xcam_outputs,
> ++ .activate = xcam_activate,
> ++ .uninit = xcam_uninit,
> ++ .flags = AVFILTER_FLAG_DYNAMIC_INPUTS
> ++};
> +--
> +2.17.1
> +
> --
> 2.17.1
>
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