/* * 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 * filter for manipulating frame side data */ #include "libavutil/avassert.h"#include "libavutil/internal.h"#include "libavutil/frame.h"#include "libavutil/opt.h"#include "avfilter.h"#include "formats.h"#include "internal.h" enum SideDataMode {    SIDEDATA_SELECT,    SIDEDATA_DELETE,    SIDEDATA_NB}; typedef struct SideDataContext {    const AVClass *class;     int mode;    enum AVFrameSideDataType type;} SideDataContext; #define OFFSET(x) offsetof(SideDataContext, x)#define DEFINE_OPTIONS(filt_name, FLAGS) \static const AVOption filt_name##_options[] = { \    { "mode", "set a mode of operation", OFFSET(mode),   AV_OPT_TYPE_INT,    {.i64 = 0 }, 0, SIDEDATA_NB-1, FLAGS, "mode" }, \    {   "select", "select frame",        0,              AV_OPT_TYPE_CONST,  {.i64 = SIDEDATA_SELECT }, 0, 0, FLAGS, "mode" }, \    {   "delete", "delete side data",    0,              AV_OPT_TYPE_CONST,  {.i64 = SIDEDATA_DELETE }, 0, 0, FLAGS, "mode" }, \    { "type",   "set side data type",    OFFSET(type),   AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, INT_MAX, FLAGS, "type" }, \    {   "PANSCAN",                    "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_PANSCAN                    }, 0, 0, FLAGS, "type" }, \    {   "A53_CC",                     "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_A53_CC                     }, 0, 0, FLAGS, "type" }, \    {   "STEREO3D",                   "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_STEREO3D                   }, 0, 0, FLAGS, "type" }, \    {   "MATRIXENCODING",             "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_MATRIXENCODING             }, 0, 0, FLAGS, "type" }, \    {   "DOWNMIX_INFO",               "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_DOWNMIX_INFO               }, 0, 0, FLAGS, "type" }, \    {   "REPLAYGAIN",                 "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_REPLAYGAIN                 }, 0, 0, FLAGS, "type" }, \    {   "DISPLAYMATRIX",              "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_DISPLAYMATRIX              }, 0, 0, FLAGS, "type" }, \    {   "AFD",                        "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_AFD                        }, 0, 0, FLAGS, "type" }, \    {   "MOTION_VECTORS",             "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_MOTION_VECTORS             }, 0, 0, FLAGS, "type" }, \    {   "SKIP_SAMPLES",               "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_SKIP_SAMPLES               }, 0, 0, FLAGS, "type" }, \    {   "AUDIO_SERVICE_TYPE",         "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_AUDIO_SERVICE_TYPE         }, 0, 0, FLAGS, "type" }, \    {   "MASTERING_DISPLAY_METADATA", "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_MASTERING_DISPLAY_METADATA }, 0, 0, FLAGS, "type" }, \    {   "GOP_TIMECODE",               "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_GOP_TIMECODE               }, 0, 0, FLAGS, "type" }, \    { NULL } \} static av_cold int init(AVFilterContext *ctx){    SideDataContext *s = ctx->priv;     if (s->type == -1 && s->mode != SIDEDATA_DELETE) {        av_log(ctx, AV_LOG_ERROR, "Side data type must be set\n");        return AVERROR(EINVAL);    }     return 0;} static int filter_frame(AVFilterLink *inlink, AVFrame *frame){    AVFilterContext *ctx = inlink->dst;    AVFilterLink *outlink = ctx->outputs[0];    SideDataContext *s = ctx->priv;    AVFrameSideData *sd = NULL;     if (s->type != -1)       sd = av_frame_get_side_data(frame, s->type);     switch (s->mode) {    case SIDEDATA_SELECT:        if (sd) {            return ff_filter_frame(outlink, frame);        }        break;    case SIDEDATA_DELETE:        if (s->type == -1) {            while (frame->nb_side_data)                av_frame_remove_side_data(frame, frame->side_data[0]->type);        } else if (sd) {            av_frame_remove_side_data(frame, s->type);        }        return ff_filter_frame(outlink, frame);        break;    default:        av_assert0(0);    };     av_frame_free(&frame);     return 0;} #if CONFIG_ASIDEDATA_FILTER DEFINE_OPTIONS(asidedata, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);AVFILTER_DEFINE_CLASS(asidedata); static const AVFilterPad ainputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_AUDIO,        .filter_frame = filter_frame,    },    { NULL }}; static const AVFilterPad aoutputs[] = {    {        .name = "default",        .type = AVMEDIA_TYPE_AUDIO,    },    { NULL }}; AVFilter ff_af_asidedata = {    .name          = "asidedata",    .description   = NULL_IF_CONFIG_SMALL("Manipulate audio frame side data."),    .priv_size     = sizeof(SideDataContext),    .priv_class    = &asidedata_class,    .init          = init,    .inputs        = ainputs,    .outputs       = aoutputs,    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,};#endif /* CONFIG_ASIDEDATA_FILTER */ #if CONFIG_SIDEDATA_FILTER DEFINE_OPTIONS(sidedata, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);AVFILTER_DEFINE_CLASS(sidedata); static const AVFilterPad inputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_VIDEO,        .filter_frame = filter_frame,    },    { NULL }}; static const AVFilterPad outputs[] = {    {        .name = "default",        .type = AVMEDIA_TYPE_VIDEO,    },    { NULL }}; AVFilter ff_vf_sidedata = {    .name        = "sidedata",    .description = NULL_IF_CONFIG_SMALL("Manipulate video frame side data."),    .priv_size   = sizeof(SideDataContext),    .priv_class  = &sidedata_class,    .init        = init,    .inputs      = inputs,    .outputs     = outputs,    .flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,};#endif /* CONFIG_SIDEDATA_FILTER */