/*
  * 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 */