[FFmpeg-devel,13/27] h264_redundant_pps_bsf: Use common cbs bsf implementation

diff --git a/libavcodec/h264_redundant_pps_bsf.c b/libavcodec/h264_redundant_pps_bsf.c
index cf41abe96c..fb91227eec 100644
--- a/libavcodec/h264_redundant_pps_bsf.c
+++ b/libavcodec/h264_redundant_pps_bsf.c
@@ -24,15 +24,13 @@ 
 #include "bsf.h"
 #include "bsf_internal.h"
 #include "cbs.h"
+#include "cbs_bsf.h"
 #include "cbs_h264.h"
 #include "h264.h"
 
 
 typedef struct H264RedundantPPSContext {
-    CodedBitstreamContext *input;
-    CodedBitstreamContext *output;
-
-    CodedBitstreamFragment access_unit;
+    CBSBSFContext common;
 
     int global_pic_init_qp;
     int current_pic_init_qp;
@@ -49,7 +47,7 @@  static int h264_redundant_pps_fixup_pps(H264RedundantPPSContext *ctx,
     // The changes we are about to perform affect the parsing process,
     // so we must make sure that the PPS is writable, otherwise the
     // parsing of future slices will be incorrect and even raise errors.
-    err = ff_cbs_make_unit_writable(ctx->input, unit);
+    err = ff_cbs_make_unit_writable(ctx->common.input, unit);
     if (err < 0)
         return err;
     pps = unit->content;
@@ -78,21 +76,14 @@  static int h264_redundant_pps_fixup_slice(H264RedundantPPSContext *ctx,
     return 0;
 }
 
-static int h264_redundant_pps_filter(AVBSFContext *bsf, AVPacket *pkt)
+static int h264_redundant_pps_update_fragment(AVBSFContext *bsf,
+                                              AVPacket *pkt,
+                                              CodedBitstreamFragment *au)
 {
     H264RedundantPPSContext *ctx = bsf->priv_data;
-    CodedBitstreamFragment *au = &ctx->access_unit;
     int au_has_sps;
     int err, i;
 
-    err = ff_bsf_get_packet_ref(bsf, pkt);
-    if (err < 0)
-        return err;
-
-    err = ff_cbs_read_packet(ctx->input, au, pkt);
-    if (err < 0)
-        goto fail;
-
     au_has_sps = 0;
     for (i = 0; i < au->nb_units; i++) {
         CodedBitstreamUnit *nal = &au->units[i];
@@ -102,7 +93,7 @@  static int h264_redundant_pps_filter(AVBSFContext *bsf, AVPacket *pkt)
         if (nal->type == H264_NAL_PPS) {
             err = h264_redundant_pps_fixup_pps(ctx, nal);
             if (err < 0)
-                goto fail;
+                return err;
             if (!au_has_sps) {
                 av_log(bsf, AV_LOG_VERBOSE, "Deleting redundant PPS "
                        "at %"PRId64".\n", pkt->pts);
@@ -118,62 +109,7 @@  static int h264_redundant_pps_filter(AVBSFContext *bsf, AVPacket *pkt)
         }
     }
 
-    err = ff_cbs_write_packet(ctx->output, pkt, au);
-    if (err < 0)
-        goto fail;
-
-    err = 0;
-fail:
-    ff_cbs_fragment_reset(au);
-    if (err < 0)
-        av_packet_unref(pkt);
-
-    return err;
-}
-
-static int h264_redundant_pps_init(AVBSFContext *bsf)
-{
-    H264RedundantPPSContext *ctx = bsf->priv_data;
-    CodedBitstreamFragment *au = &ctx->access_unit;
-    int err, i;
-
-    err = ff_cbs_init(&ctx->input, AV_CODEC_ID_H264, bsf);
-    if (err < 0)
-        return err;
-
-    err = ff_cbs_init(&ctx->output, AV_CODEC_ID_H264, bsf);
-    if (err < 0)
-        return err;
-
-    ctx->global_pic_init_qp = 26;
-
-    if (bsf->par_in->extradata) {
-        err = ff_cbs_read_extradata(ctx->input, au, bsf->par_in);
-        if (err < 0) {
-            av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
-            goto fail;
-        }
-
-        for (i = 0; i < au->nb_units; i++) {
-            if (au->units[i].type == H264_NAL_PPS) {
-                err = h264_redundant_pps_fixup_pps(ctx, &au->units[i]);
-                if (err < 0)
-                    goto fail;
-            }
-        }
-
-        ctx->extradata_pic_init_qp = ctx->current_pic_init_qp;
-        err = ff_cbs_write_extradata(ctx->output, bsf->par_out, au);
-        if (err < 0) {
-            av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
-            goto fail;
-        }
-    }
-
-    err = 0;
-fail:
-    ff_cbs_fragment_reset(au);
-    return err;
+    return 0;
 }
 
 static void h264_redundant_pps_flush(AVBSFContext *bsf)
@@ -182,13 +118,20 @@  static void h264_redundant_pps_flush(AVBSFContext *bsf)
     ctx->current_pic_init_qp = ctx->extradata_pic_init_qp;
 }
 
-static void h264_redundant_pps_close(AVBSFContext *bsf)
+static const CBSBSFType h264_redundant_pps_type = {
+    .codec_id        = AV_CODEC_ID_H264,
+    .fragment_name   = "access unit",
+    .unit_name       = "NAL unit",
+    .update_fragment = &h264_redundant_pps_update_fragment,
+};
+
+static int h264_redundant_pps_init(AVBSFContext *bsf)
 {
     H264RedundantPPSContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(&ctx->access_unit);
-    ff_cbs_close(&ctx->input);
-    ff_cbs_close(&ctx->output);
+    ctx->global_pic_init_qp = 26;
+
+    return ff_cbs_bsf_init(bsf, &h264_redundant_pps_type);
 }
 
 static const enum AVCodecID h264_redundant_pps_codec_ids[] = {
@@ -200,7 +143,7 @@  const AVBitStreamFilter ff_h264_redundant_pps_bsf = {
     .priv_data_size = sizeof(H264RedundantPPSContext),
     .init           = &h264_redundant_pps_init,
     .flush          = &h264_redundant_pps_flush,
-    .close          = &h264_redundant_pps_close,
-    .filter         = &h264_redundant_pps_filter,
+    .close          = &ff_cbs_bsf_close,
+    .filter         = &ff_cbs_bsf_filter,
     .codec_ids      = h264_redundant_pps_codec_ids,
 };