avcodec/cbs: Remove unused function parameters

Several cbs-functions had an unused CodedBitstreamContext parameter.
This commit removes these.

Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

23 files changed, 138 insertions, 165 deletions

diff --git a/libavcodec/av1_frame_merge_bsf.c b/libavcodec/av1_frame_merge_bsf.c
index b5aa57e0ff..baea5596d7 100644
--- a/libavcodec/av1_frame_merge_bsf.c
+++ b/libavcodec/av1_frame_merge_bsf.c
@@ -34,8 +34,8 @@ static void av1_frame_merge_flush(AVBSFContext *bsf)
 {
     AV1FMergeContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_reset(ctx->cbc, &ctx->frag[0]);
-    ff_cbs_fragment_reset(ctx->cbc, &ctx->frag[1]);
+    ff_cbs_fragment_reset(&ctx->frag[0]);
+    ff_cbs_fragment_reset(&ctx->frag[1]);
     av_packet_unref(ctx->in);
     av_packet_unref(ctx->pkt);
 }
@@ -93,7 +93,7 @@ eof:
         ctx->idx = !ctx->idx;
     } else {
         for (i = 0; i < frag->nb_units; i++) {
-            err = ff_cbs_insert_unit_content(ctx->cbc, tu, -1, frag->units[i].type,
+            err = ff_cbs_insert_unit_content(tu, -1, frag->units[i].type,
                                              frag->units[i].content, frag->units[i].content_ref);
             if (err < 0)
                 goto fail;
@@ -108,7 +108,7 @@ eof:
     else
         av_packet_unref(in);
 
-    ff_cbs_fragment_reset(ctx->cbc, &ctx->frag[ctx->idx]);
+    ff_cbs_fragment_reset(&ctx->frag[ctx->idx]);
 
 fail:
     if (err < 0 && err != AVERROR(EAGAIN))
@@ -133,8 +133,8 @@ static void av1_frame_merge_close(AVBSFContext *bsf)
 {
     AV1FMergeContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->frag[0]);
-    ff_cbs_fragment_free(ctx->cbc, &ctx->frag[1]);
+    ff_cbs_fragment_free(&ctx->frag[0]);
+    ff_cbs_fragment_free(&ctx->frag[1]);
     av_packet_free(&ctx->in);
     av_packet_free(&ctx->pkt);
     ff_cbs_close(&ctx->cbc);
diff --git a/libavcodec/av1_frame_split_bsf.c b/libavcodec/av1_frame_split_bsf.c
index 87dfc83103..13bebe19f5 100644
--- a/libavcodec/av1_frame_split_bsf.c
+++ b/libavcodec/av1_frame_split_bsf.c
@@ -172,7 +172,7 @@ static int av1_frame_split_filter(AVBSFContext *ctx, AVPacket *out)
 
         if (s->cur_frame == s->nb_frames) {
             av_packet_unref(s->buffer_pkt);
-            ff_cbs_fragment_reset(s->cbc, td);
+            ff_cbs_fragment_reset(td);
         }
 
         return 0;
@@ -187,7 +187,7 @@ fail:
         av_packet_unref(out);
         av_packet_unref(s->buffer_pkt);
     }
-    ff_cbs_fragment_reset(s->cbc, td);
+    ff_cbs_fragment_reset(td);
 
     return ret;
 }
@@ -224,7 +224,7 @@ static int av1_frame_split_init(AVBSFContext *ctx)
     if (ret < 0)
         av_log(ctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
 
-    ff_cbs_fragment_reset(s->cbc, td);
+    ff_cbs_fragment_reset(td);
 
     return 0;
 }
@@ -234,7 +234,7 @@ static void av1_frame_split_flush(AVBSFContext *ctx)
     AV1FSplitContext *s = ctx->priv_data;
 
     av_packet_unref(s->buffer_pkt);
-    ff_cbs_fragment_reset(s->cbc, &s->temporal_unit);
+    ff_cbs_fragment_reset(&s->temporal_unit);
 }
 
 static void av1_frame_split_close(AVBSFContext *ctx)
@@ -242,7 +242,7 @@ static void av1_frame_split_close(AVBSFContext *ctx)
     AV1FSplitContext *s = ctx->priv_data;
 
     av_packet_free(&s->buffer_pkt);
-    ff_cbs_fragment_free(s->cbc, &s->temporal_unit);
+    ff_cbs_fragment_free(&s->temporal_unit);
     ff_cbs_close(&s->cbc);
 }
 
diff --git a/libavcodec/av1_metadata_bsf.c b/libavcodec/av1_metadata_bsf.c
index ee1a63c1ec..3e3cbfd174 100644
--- a/libavcodec/av1_metadata_bsf.c
+++ b/libavcodec/av1_metadata_bsf.c
@@ -151,7 +151,7 @@ static int av1_metadata_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
         return AVERROR(ENOMEM);
     memcpy(side_data, frag->data, frag->data_size);
 
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
 
     return 0;
 }
@@ -195,13 +195,13 @@ static int av1_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
     // If a Temporal Delimiter is present, it must be the first OBU.
     if (frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
         if (ctx->td == REMOVE)
-            ff_cbs_delete_unit(ctx->cbc, frag, 0);
+            ff_cbs_delete_unit(frag, 0);
     } else if (ctx->td == INSERT) {
         td = (AV1RawOBU) {
             .header.obu_type = AV1_OBU_TEMPORAL_DELIMITER,
         };
 
-        err = ff_cbs_insert_unit_content(ctx->cbc, frag, 0, AV1_OBU_TEMPORAL_DELIMITER,
+        err = ff_cbs_insert_unit_content(frag, 0, AV1_OBU_TEMPORAL_DELIMITER,
                                          &td, NULL);
         if (err < 0) {
             av_log(bsf, AV_LOG_ERROR, "Failed to insert Temporal Delimiter.\n");
@@ -212,7 +212,7 @@ static int av1_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
     if (ctx->delete_padding) {
         for (i = frag->nb_units - 1; i >= 0; i--) {
             if (frag->units[i].type == AV1_OBU_PADDING)
-                ff_cbs_delete_unit(ctx->cbc, frag, i);
+                ff_cbs_delete_unit(frag, i);
         }
     }
 
@@ -224,7 +224,7 @@ static int av1_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
 
     if (err < 0)
         av_packet_unref(pkt);
@@ -268,7 +268,7 @@ static int av1_metadata_init(AVBSFContext *bsf)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
     return err;
 }
 
@@ -276,7 +276,7 @@ static void av1_metadata_close(AVBSFContext *bsf)
 {
     AV1MetadataContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->access_unit);
+    ff_cbs_fragment_free(&ctx->access_unit);
     ff_cbs_close(&ctx->cbc);
 }
 
diff --git a/libavcodec/av1_parser.c b/libavcodec/av1_parser.c
index 036ab5e14e..cd426a2b0f 100644
--- a/libavcodec/av1_parser.c
+++ b/libavcodec/av1_parser.c
@@ -78,7 +78,7 @@ static int av1_parser_parse(AVCodecParserContext *ctx,
             av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
         }
 
-        ff_cbs_fragment_reset(s->cbc, td);
+        ff_cbs_fragment_reset(td);
     }
 
     ret = ff_cbs_read(s->cbc, td, data, size);
@@ -191,7 +191,7 @@ static int av1_parser_parse(AVCodecParserContext *ctx,
         avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
 
 end:
-    ff_cbs_fragment_reset(s->cbc, td);
+    ff_cbs_fragment_reset(td);
 
     s->cbc->log_ctx = NULL;
 
@@ -225,7 +225,7 @@ static void av1_parser_close(AVCodecParserContext *ctx)
 {
     AV1ParseContext *s = ctx->priv_data;
 
-    ff_cbs_fragment_free(s->cbc, &s->temporal_unit);
+    ff_cbs_fragment_free(&s->temporal_unit);
     ff_cbs_close(&s->cbc);
 }
 
diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index 42cb9711fa..6464980c8e 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -127,8 +127,7 @@ void ff_cbs_close(CodedBitstreamContext **ctx_ptr)
     av_freep(ctx_ptr);
 }
 
-static void cbs_unit_uninit(CodedBitstreamContext *ctx,
-                            CodedBitstreamUnit *unit)
+static void cbs_unit_uninit(CodedBitstreamUnit *unit)
 {
     av_buffer_unref(&unit->content_ref);
     unit->content = NULL;
@@ -139,13 +138,12 @@ static void cbs_unit_uninit(CodedBitstreamContext *ctx,
     unit->data_bit_padding = 0;
 }
 
-void ff_cbs_fragment_reset(CodedBitstreamContext *ctx,
-                           CodedBitstreamFragment *frag)
+void ff_cbs_fragment_reset(CodedBitstreamFragment *frag)
 {
     int i;
 
     for (i = 0; i < frag->nb_units; i++)
-        cbs_unit_uninit(ctx, &frag->units[i]);
+        cbs_unit_uninit(&frag->units[i]);
     frag->nb_units = 0;
 
     av_buffer_unref(&frag->data_ref);
@@ -154,10 +152,9 @@ void ff_cbs_fragment_reset(CodedBitstreamContext *ctx,
     frag->data_bit_padding = 0;
 }
 
-void ff_cbs_fragment_free(CodedBitstreamContext *ctx,
-                          CodedBitstreamFragment *frag)
+void ff_cbs_fragment_free(CodedBitstreamFragment *frag)
 {
-    ff_cbs_fragment_reset(ctx, frag);
+    ff_cbs_fragment_reset(frag);
 
     av_freep(&frag->units);
     frag->nb_units_allocated = 0;
@@ -200,8 +197,7 @@ static int cbs_read_fragment_content(CodedBitstreamContext *ctx,
     return 0;
 }
 
-static int cbs_fill_fragment_data(CodedBitstreamContext *ctx,
-                                  CodedBitstreamFragment *frag,
+static int cbs_fill_fragment_data(CodedBitstreamFragment *frag,
                                   const uint8_t *data, size_t size)
 {
     av_assert0(!frag->data && !frag->data_ref);
@@ -227,7 +223,7 @@ int ff_cbs_read_extradata(CodedBitstreamContext *ctx,
 {
     int err;
 
-    err = cbs_fill_fragment_data(ctx, frag, par->extradata,
+    err = cbs_fill_fragment_data(frag, par->extradata,
                                  par->extradata_size);
     if (err < 0)
         return err;
@@ -254,7 +250,7 @@ int ff_cbs_read_packet(CodedBitstreamContext *ctx,
         frag->data_size = pkt->size;
 
     } else {
-        err = cbs_fill_fragment_data(ctx, frag, pkt->data, pkt->size);
+        err = cbs_fill_fragment_data(frag, pkt->data, pkt->size);
         if (err < 0)
             return err;
     }
@@ -272,7 +268,7 @@ int ff_cbs_read(CodedBitstreamContext *ctx,
 {
     int err;
 
-    err = cbs_fill_fragment_data(ctx, frag, data, size);
+    err = cbs_fill_fragment_data(frag, data, size);
     if (err < 0)
         return err;
 
@@ -328,7 +324,7 @@ static int cbs_write_unit_data(CodedBitstreamContext *ctx,
 
     flush_put_bits(&pbc);
 
-    ret = ff_cbs_alloc_unit_data(ctx, unit, put_bits_count(&pbc) / 8);
+    ret = ff_cbs_alloc_unit_data(unit, put_bits_count(&pbc) / 8);
     if (ret < 0)
         return ret;
 
@@ -641,8 +637,7 @@ int ff_cbs_write_signed(CodedBitstreamContext *ctx, PutBitContext *pbc,
 }
 
 
-int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
-                              CodedBitstreamUnit *unit,
+int ff_cbs_alloc_unit_content(CodedBitstreamUnit *unit,
                               size_t size,
                               void (*free)(void *opaque, uint8_t *data))
 {
@@ -662,8 +657,7 @@ int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
     return 0;
 }
 
-int ff_cbs_alloc_unit_data(CodedBitstreamContext *ctx,
-                           CodedBitstreamUnit *unit,
+int ff_cbs_alloc_unit_data(CodedBitstreamUnit *unit,
                            size_t size)
 {
     av_assert0(!unit->data && !unit->data_ref);
@@ -680,8 +674,7 @@ int ff_cbs_alloc_unit_data(CodedBitstreamContext *ctx,
     return 0;
 }
 
-static int cbs_insert_unit(CodedBitstreamContext *ctx,
-                           CodedBitstreamFragment *frag,
+static int cbs_insert_unit(CodedBitstreamFragment *frag,
                            int position)
 {
     CodedBitstreamUnit *units;
@@ -719,8 +712,7 @@ static int cbs_insert_unit(CodedBitstreamContext *ctx,
     return 0;
 }
 
-int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx,
-                               CodedBitstreamFragment *frag,
+int ff_cbs_insert_unit_content(CodedBitstreamFragment *frag,
                                int position,
                                CodedBitstreamUnitType type,
                                void *content,
@@ -742,7 +734,7 @@ int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx,
         content_ref = NULL;
     }
 
-    err = cbs_insert_unit(ctx, frag, position);
+    err = cbs_insert_unit(frag, position);
     if (err < 0) {
         av_buffer_unref(&content_ref);
         return err;
@@ -756,8 +748,7 @@ int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx,
     return 0;
 }
 
-int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
-                            CodedBitstreamFragment *frag,
+int ff_cbs_insert_unit_data(CodedBitstreamFragment *frag,
                             int position,
                             CodedBitstreamUnitType type,
                             uint8_t *data, size_t data_size,
@@ -781,7 +772,7 @@ int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
         return AVERROR(ENOMEM);
     }
 
-    err = cbs_insert_unit(ctx, frag, position);
+    err = cbs_insert_unit(frag, position);
     if (err < 0) {
         av_buffer_unref(&data_ref);
         return err;
@@ -796,14 +787,13 @@ int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
     return 0;
 }
 
-void ff_cbs_delete_unit(CodedBitstreamContext *ctx,
-                        CodedBitstreamFragment *frag,
+void ff_cbs_delete_unit(CodedBitstreamFragment *frag,
                         int position)
 {
     av_assert0(0 <= position && position < frag->nb_units
                              && "Unit to be deleted not in fragment.");
 
-    cbs_unit_uninit(ctx, &frag->units[position]);
+    cbs_unit_uninit(&frag->units[position]);
 
     --frag->nb_units;
 
diff --git a/libavcodec/cbs.h b/libavcodec/cbs.h
index 9ca1fbd609..e897e348a2 100644
--- a/libavcodec/cbs.h
+++ b/libavcodec/cbs.h
@@ -330,23 +330,20 @@ int ff_cbs_write_packet(CodedBitstreamContext *ctx,
  * Free the units contained in a fragment as well as the fragment's
  * own data buffer, but not the units array itself.
  */
-void ff_cbs_fragment_reset(CodedBitstreamContext *ctx,
-                            CodedBitstreamFragment *frag);
+void ff_cbs_fragment_reset(CodedBitstreamFragment *frag);
 
 /**
  * Free the units array of a fragment in addition to what
  * ff_cbs_fragment_reset does.
  */
-void ff_cbs_fragment_free(CodedBitstreamContext *ctx,
-                          CodedBitstreamFragment *frag);
+void ff_cbs_fragment_free(CodedBitstreamFragment *frag);
 
 /**
  * Allocate a new internal content buffer of the given size in the unit.
  *
  * The content will be zeroed.
  */
-int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
-                              CodedBitstreamUnit *unit,
+int ff_cbs_alloc_unit_content(CodedBitstreamUnit *unit,
                               size_t size,
                               void (*free)(void *opaque, uint8_t *content));
 
@@ -355,8 +352,7 @@ int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
  *
  * The data buffer will have input padding.
  */
-int ff_cbs_alloc_unit_data(CodedBitstreamContext *ctx,
-                           CodedBitstreamUnit *unit,
+int ff_cbs_alloc_unit_data(CodedBitstreamUnit *unit,
                            size_t size);
 
 /**
@@ -365,8 +361,7 @@ int ff_cbs_alloc_unit_data(CodedBitstreamContext *ctx,
  * The content structure continues to be owned by the caller if
  * content_buf is not supplied.
  */
-int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx,
-                               CodedBitstreamFragment *frag,
+int ff_cbs_insert_unit_content(CodedBitstreamFragment *frag,
                                int position,
                                CodedBitstreamUnitType type,
                                void *content,
@@ -379,8 +374,7 @@ int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx,
  * av_malloc() and will on success become owned by the unit after this
  * call or freed on error.
  */
-int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
-                            CodedBitstreamFragment *frag,
+int ff_cbs_insert_unit_data(CodedBitstreamFragment *frag,
                             int position,
                             CodedBitstreamUnitType type,
                             uint8_t *data, size_t data_size,
@@ -391,8 +385,7 @@ int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
  *
  * Requires position to be >= 0 and < frag->nb_units.
  */
-void ff_cbs_delete_unit(CodedBitstreamContext *ctx,
-                        CodedBitstreamFragment *frag,
+void ff_cbs_delete_unit(CodedBitstreamFragment *frag,
                         int position);
 
 
diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c
index dc7be089ac..b2a1d2ded1 100644
--- a/libavcodec/cbs_av1.c
+++ b/libavcodec/cbs_av1.c
@@ -794,7 +794,7 @@ static int cbs_av1_split_fragment(CodedBitstreamContext *ctx,
             goto fail;
         }
 
-        err = ff_cbs_insert_unit_data(ctx, frag, -1, header.obu_type,
+        err = ff_cbs_insert_unit_data(frag, -1, header.obu_type,
                                       data, obu_length, frag->data_ref);
         if (err < 0)
             goto fail;
@@ -887,7 +887,7 @@ static int cbs_av1_read_unit(CodedBitstreamContext *ctx,
     GetBitContext gbc;
     int err, start_pos, end_pos;
 
-    err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*obu),
+    err = ff_cbs_alloc_unit_content(unit, sizeof(*obu),
                                     &cbs_av1_free_obu);
     if (err < 0)
         return err;
diff --git a/libavcodec/cbs_h264.h b/libavcodec/cbs_h264.h
index 9f7c2a0d30..f54ccd3b36 100644
--- a/libavcodec/cbs_h264.h
+++ b/libavcodec/cbs_h264.h
@@ -472,8 +472,7 @@ typedef struct CodedBitstreamH264Context {
  * On success, the payload will be owned by a unit in access_unit;
  * on failure, the content of the payload will be freed.
  */
-int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
-                                CodedBitstreamFragment *access_unit,
+int ff_cbs_h264_add_sei_message(CodedBitstreamFragment *access_unit,
                                 H264RawSEIPayload *payload);
 
 /**
@@ -485,8 +484,7 @@ int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
  * Requires nal_unit to be a unit in access_unit and position to be >= 0
  * and < the payload count of the SEI nal_unit.
  */
-void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
-                                    CodedBitstreamFragment *access_unit,
+void ff_cbs_h264_delete_sei_message(CodedBitstreamFragment *access_unit,
                                     CodedBitstreamUnit *nal_unit,
                                     int position);
 
diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
index 64fe2c1b9b..e5c8012d39 100644
--- a/libavcodec/cbs_h2645.c
+++ b/libavcodec/cbs_h2645.c
@@ -591,7 +591,7 @@ static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
         ref = (nal->data == nal->raw_data) ? frag->data_ref
                                            : packet->rbsp.rbsp_buffer_ref;
 
-        err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
+        err = ff_cbs_insert_unit_data(frag, -1, nal->type,
                             (uint8_t*)nal->data, size, ref);
         if (err < 0)
             return err;
@@ -807,7 +807,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
         {
             H264RawSPS *sps;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL);
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*sps), NULL);
             if (err < 0)
                 return err;
             sps = unit->content;
@@ -824,7 +824,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
 
     case H264_NAL_SPS_EXT:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit,
+            err = ff_cbs_alloc_unit_content(unit,
                                             sizeof(H264RawSPSExtension),
                                             NULL);
             if (err < 0)
@@ -840,7 +840,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
         {
             H264RawPPS *pps;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*pps),
                                             &cbs_h264_free_pps);
             if (err < 0)
                 return err;
@@ -863,7 +863,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
             H264RawSlice *slice;
             int pos, len;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*slice),
                                             &cbs_h264_free_slice);
             if (err < 0)
                 return err;
@@ -890,7 +890,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
 
     case H264_NAL_AUD:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit,
+            err = ff_cbs_alloc_unit_content(unit,
                                             sizeof(H264RawAUD), NULL);
             if (err < 0)
                 return err;
@@ -903,7 +903,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
 
     case H264_NAL_SEI:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(H264RawSEI),
                                             &cbs_h264_free_sei);
             if (err < 0)
                 return err;
@@ -916,7 +916,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
 
     case H264_NAL_FILLER_DATA:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit,
+            err = ff_cbs_alloc_unit_content(unit,
                                             sizeof(H264RawFiller), NULL);
             if (err < 0)
                 return err;
@@ -930,7 +930,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
     case H264_NAL_END_SEQUENCE:
     case H264_NAL_END_STREAM:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit,
+            err = ff_cbs_alloc_unit_content(unit,
                                             sizeof(H264RawNALUnitHeader),
                                             NULL);
             if (err < 0)
@@ -966,7 +966,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
         {
             H265RawVPS *vps;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*vps),
                                             &cbs_h265_free_vps);
             if (err < 0)
                 return err;
@@ -985,7 +985,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
         {
             H265RawSPS *sps;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*sps),
                                             &cbs_h265_free_sps);
             if (err < 0)
                 return err;
@@ -1005,7 +1005,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
         {
             H265RawPPS *pps;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*pps),
                                             &cbs_h265_free_pps);
             if (err < 0)
                 return err;
@@ -1041,7 +1041,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
             H265RawSlice *slice;
             int pos, len;
 
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(*slice),
                                             &cbs_h265_free_slice);
             if (err < 0)
                 return err;
@@ -1068,7 +1068,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
 
     case HEVC_NAL_AUD:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit,
+            err = ff_cbs_alloc_unit_content(unit,
                                             sizeof(H265RawAUD), NULL);
             if (err < 0)
                 return err;
@@ -1082,7 +1082,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
     case HEVC_NAL_SEI_PREFIX:
     case HEVC_NAL_SEI_SUFFIX:
         {
-            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
+            err = ff_cbs_alloc_unit_content(unit, sizeof(H265RawSEI),
                                             &cbs_h265_free_sei);
 
             if (err < 0)
@@ -1531,8 +1531,7 @@ const CodedBitstreamType ff_cbs_type_h265 = {
     .close             = &cbs_h265_close,
 };
 
-int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
-                                CodedBitstreamFragment *au,
+int ff_cbs_h264_add_sei_message(CodedBitstreamFragment *au,
                                 H264RawSEIPayload *payload)
 {
     H264RawSEI *sei = NULL;
@@ -1577,7 +1576,7 @@ int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
                 break;
         }
 
-        err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI,
+        err = ff_cbs_insert_unit_content(au, i, H264_NAL_SEI,
                                          sei, sei_ref);
         av_buffer_unref(&sei_ref);
         if (err < 0)
@@ -1593,8 +1592,7 @@ fail:
     return err;
 }
 
-void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
-                                    CodedBitstreamFragment *au,
+void ff_cbs_h264_delete_sei_message(CodedBitstreamFragment *au,
                                     CodedBitstreamUnit *nal,
                                     int position)
 {
@@ -1612,7 +1610,7 @@ void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
                 break;
         }
 
-        ff_cbs_delete_unit(ctx, au, i);
+        ff_cbs_delete_unit(au, i);
     } else {
         cbs_h264_free_sei_payload(&sei->payload[position]);
 
diff --git a/libavcodec/cbs_jpeg.c b/libavcodec/cbs_jpeg.c
index 6959ecee7f..09329434e4 100644
--- a/libavcodec/cbs_jpeg.c
+++ b/libavcodec/cbs_jpeg.c
@@ -225,7 +225,7 @@ static int cbs_jpeg_split_fragment(CodedBitstreamContext *ctx,
             data_ref  = frag->data_ref;
         }
 
-        err = ff_cbs_insert_unit_data(ctx, frag, unit, marker,
+        err = ff_cbs_insert_unit_data(frag, unit, marker,
                                       data, data_size, data_ref);
         if (err < 0)
             return err;
@@ -251,7 +251,7 @@ static int cbs_jpeg_read_unit(CodedBitstreamContext *ctx,
 
     if (unit->type >= JPEG_MARKER_SOF0 &&
         unit->type <= JPEG_MARKER_SOF3) {
-        err = ff_cbs_alloc_unit_content(ctx, unit,
+        err = ff_cbs_alloc_unit_content(unit,
                                         sizeof(JPEGRawFrameHeader),
                                         NULL);
         if (err < 0)
@@ -263,7 +263,7 @@ static int cbs_jpeg_read_unit(CodedBitstreamContext *ctx,
 
     } else if (unit->type >= JPEG_MARKER_APPN &&
                unit->type <= JPEG_MARKER_APPN + 15) {
-        err = ff_cbs_alloc_unit_content(ctx, unit,
+        err = ff_cbs_alloc_unit_content(unit,
                                         sizeof(JPEGRawApplicationData),
                                         &cbs_jpeg_free_application_data);
         if (err < 0)
@@ -277,7 +277,7 @@ static int cbs_jpeg_read_unit(CodedBitstreamContext *ctx,
         JPEGRawScan *scan;
         int pos;
 
-        err = ff_cbs_alloc_unit_content(ctx, unit,
+        err = ff_cbs_alloc_unit_content(unit,
                                         sizeof(JPEGRawScan),
                                         &cbs_jpeg_free_scan);
         if (err < 0)
@@ -303,7 +303,7 @@ static int cbs_jpeg_read_unit(CodedBitstreamContext *ctx,
 #define SEGMENT(marker, type, func, free) \
         case JPEG_MARKER_ ## marker: \
             { \
-                err = ff_cbs_alloc_unit_content(ctx, unit, \
+                err = ff_cbs_alloc_unit_content(unit, \
                                                 sizeof(type), free); \
                 if (err < 0) \
                     return err; \
diff --git a/libavcodec/cbs_mpeg2.c b/libavcodec/cbs_mpeg2.c
index 97f7889cbb..8b6e5a9852 100644
--- a/libavcodec/cbs_mpeg2.c
+++ b/libavcodec/cbs_mpeg2.c
@@ -207,7 +207,7 @@ static int cbs_mpeg2_split_fragment(CodedBitstreamContext *ctx,
            final     = 1;
         }
 
-        err = ff_cbs_insert_unit_data(ctx, frag, i, unit_type, (uint8_t*)start,
+        err = ff_cbs_insert_unit_data(frag, i, unit_type, (uint8_t*)start,
                                       unit_size, frag->data_ref);
         if (err < 0)
             return err;
@@ -235,7 +235,7 @@ static int cbs_mpeg2_read_unit(CodedBitstreamContext *ctx,
         MPEG2RawSlice *slice;
         int pos, len;
 
-        err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
+        err = ff_cbs_alloc_unit_content(unit, sizeof(*slice),
                                         &cbs_mpeg2_free_slice);
         if (err < 0)
             return err;
@@ -265,7 +265,7 @@ static int cbs_mpeg2_read_unit(CodedBitstreamContext *ctx,
         case start_code: \
             { \
                 type *header; \
-                err = ff_cbs_alloc_unit_content(ctx, unit, \
+                err = ff_cbs_alloc_unit_content(unit, \
                                                 sizeof(*header), free_func); \
                 if (err < 0) \
                     return err; \
diff --git a/libavcodec/cbs_vp9.c b/libavcodec/cbs_vp9.c
index eef603bfb2..6e0a7dcbea 100644
--- a/libavcodec/cbs_vp9.c
+++ b/libavcodec/cbs_vp9.c
@@ -451,7 +451,7 @@ static int cbs_vp9_split_fragment(CodedBitstreamContext *ctx,
                 return AVERROR_INVALIDDATA;
             }
 
-            err = ff_cbs_insert_unit_data(ctx, frag, -1, 0,
+            err = ff_cbs_insert_unit_data(frag, -1, 0,
                                           frag->data + pos,
                                           sfi.frame_sizes[i],
                                           frag->data_ref);
@@ -469,7 +469,7 @@ static int cbs_vp9_split_fragment(CodedBitstreamContext *ctx,
         return 0;
 
     } else {
-        err = ff_cbs_insert_unit_data(ctx, frag, -1, 0,
+        err = ff_cbs_insert_unit_data(frag, -1, 0,
                                       frag->data, frag->data_size,
                                       frag->data_ref);
         if (err < 0)
@@ -497,7 +497,7 @@ static int cbs_vp9_read_unit(CodedBitstreamContext *ctx,
     if (err < 0)
         return err;
 
-    err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*frame),
+    err = ff_cbs_alloc_unit_content(unit, sizeof(*frame),
                                     &cbs_vp9_free_frame);
     if (err < 0)
         return err;
diff --git a/libavcodec/filter_units_bsf.c b/libavcodec/filter_units_bsf.c
index 700dc06ef6..354594ac50 100644
--- a/libavcodec/filter_units_bsf.c
+++ b/libavcodec/filter_units_bsf.c
@@ -125,7 +125,7 @@ static int filter_units_filter(AVBSFContext *bsf, AVPacket *pkt)
         }
         if (ctx->mode == REMOVE ? j <  ctx->nb_types
                                 : j >= ctx->nb_types)
-            ff_cbs_delete_unit(ctx->cbc, frag, i);
+            ff_cbs_delete_unit(frag, i);
     }
 
     if (frag->nb_units == 0) {
@@ -143,7 +143,7 @@ static int filter_units_filter(AVBSFContext *bsf, AVPacket *pkt)
 fail:
     if (err < 0)
         av_packet_unref(pkt);
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
 
     return err;
 }
@@ -199,7 +199,7 @@ static int filter_units_init(AVBSFContext *bsf)
                 av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
         }
 
-        ff_cbs_fragment_reset(ctx->cbc, frag);
+        ff_cbs_fragment_reset(frag);
     }
 
     return err;
@@ -211,7 +211,7 @@ static void filter_units_close(AVBSFContext *bsf)
 
     av_freep(&ctx->type_list);
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->fragment);
+    ff_cbs_fragment_free(&ctx->fragment);
     ff_cbs_close(&ctx->cbc);
 }
 
diff --git a/libavcodec/h264_metadata_bsf.c b/libavcodec/h264_metadata_bsf.c
index cef054bd65..09aa1765fd 100644
--- a/libavcodec/h264_metadata_bsf.c
+++ b/libavcodec/h264_metadata_bsf.c
@@ -314,7 +314,7 @@ static int h264_metadata_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
         return AVERROR(ENOMEM);
     memcpy(side_data, au->data, au->data_size);
 
-    ff_cbs_fragment_reset(ctx->cbc, au);
+    ff_cbs_fragment_reset(au);
 
     return 0;
 }
@@ -349,7 +349,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
     // If an AUD is present, it must be the first NAL unit.
     if (au->units[0].type == H264_NAL_AUD) {
         if (ctx->aud == REMOVE)
-            ff_cbs_delete_unit(ctx->cbc, au, 0);
+            ff_cbs_delete_unit(au, 0);
     } else {
         if (ctx->aud == INSERT) {
             static const int primary_pic_type_table[] = {
@@ -390,7 +390,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
                 .primary_pic_type = j,
             };
 
-            err = ff_cbs_insert_unit_content(ctx->cbc, au,
+            err = ff_cbs_insert_unit_content(au,
                                              0, H264_NAL_AUD, &aud, NULL);
             if (err < 0) {
                 av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
@@ -448,7 +448,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
             udu->data_length = len + 1;
             memcpy(udu->data, ctx->sei_user_data + i + 1, len + 1);
 
-            err = ff_cbs_h264_add_sei_message(ctx->cbc, au, &payload);
+            err = ff_cbs_h264_add_sei_message(au, &payload);
             if (err < 0) {
                 av_log(bsf, AV_LOG_ERROR, "Failed to add user data SEI "
                        "message to access unit.\n");
@@ -467,7 +467,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
     if (ctx->delete_filler) {
         for (i = au->nb_units - 1; i >= 0; i--) {
             if (au->units[i].type == H264_NAL_FILLER_DATA) {
-                ff_cbs_delete_unit(ctx->cbc, au, i);
+                ff_cbs_delete_unit(au, i);
                 continue;
             }
 
@@ -478,8 +478,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
                 for (j = sei->payload_count - 1; j >= 0; j--) {
                     if (sei->payload[j].payload_type ==
                         H264_SEI_TYPE_FILLER_PAYLOAD)
-                        ff_cbs_h264_delete_sei_message(ctx->cbc, au,
-                                                       &au->units[i], j);
+                        ff_cbs_h264_delete_sei_message(au, &au->units[i], j);
                 }
             }
         }
@@ -503,8 +502,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 
                 if (ctx->display_orientation == REMOVE ||
                     ctx->display_orientation == INSERT) {
-                    ff_cbs_h264_delete_sei_message(ctx->cbc, au,
-                                                   &au->units[i], j);
+                    ff_cbs_h264_delete_sei_message(au, &au->units[i], j);
                     continue;
                 }
 
@@ -595,7 +593,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
         if (write) {
             disp->display_orientation_repetition_period = 1;
 
-            err = ff_cbs_h264_add_sei_message(ctx->cbc, au, &payload);
+            err = ff_cbs_h264_add_sei_message(au, &payload);
             if (err < 0) {
                 av_log(bsf, AV_LOG_ERROR, "Failed to add display orientation "
                        "SEI message to access unit.\n");
@@ -614,7 +612,7 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, au);
+    ff_cbs_fragment_reset(au);
 
     if (err < 0)
         av_packet_unref(pkt);
@@ -656,7 +654,7 @@ static int h264_metadata_init(AVBSFContext *bsf)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -664,7 +662,7 @@ static void h264_metadata_close(AVBSFContext *bsf)
 {
     H264MetadataContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->access_unit);
+    ff_cbs_fragment_free(&ctx->access_unit);
     ff_cbs_close(&ctx->cbc);
 }
 
diff --git a/libavcodec/h264_redundant_pps_bsf.c b/libavcodec/h264_redundant_pps_bsf.c
index 8f69780951..a8af4105cf 100644
--- a/libavcodec/h264_redundant_pps_bsf.c
+++ b/libavcodec/h264_redundant_pps_bsf.c
@@ -95,7 +95,7 @@ static int h264_redundant_pps_filter(AVBSFContext *bsf, AVPacket *pkt)
             if (!au_has_sps) {
                 av_log(bsf, AV_LOG_VERBOSE, "Deleting redundant PPS "
                        "at %"PRId64".\n", pkt->pts);
-                ff_cbs_delete_unit(ctx->input, au, i);
+                ff_cbs_delete_unit(au, i);
                 i--;
                 continue;
             }
@@ -113,7 +113,7 @@ static int h264_redundant_pps_filter(AVBSFContext *bsf, AVPacket *pkt)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->output, au);
+    ff_cbs_fragment_reset(au);
     if (err < 0)
         av_packet_unref(pkt);
 
@@ -161,7 +161,7 @@ static int h264_redundant_pps_init(AVBSFContext *bsf)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->output, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -175,7 +175,7 @@ static void h264_redundant_pps_close(AVBSFContext *bsf)
 {
     H264RedundantPPSContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->input, &ctx->access_unit);
+    ff_cbs_fragment_free(&ctx->access_unit);
     ff_cbs_close(&ctx->input);
     ff_cbs_close(&ctx->output);
 }
diff --git a/libavcodec/h265_metadata_bsf.c b/libavcodec/h265_metadata_bsf.c
index 749456157b..b48a0bd3e9 100644
--- a/libavcodec/h265_metadata_bsf.c
+++ b/libavcodec/h265_metadata_bsf.c
@@ -383,7 +383,7 @@ static int h265_metadata_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
         return AVERROR(ENOMEM);
     memcpy(side_data, au->data, au->data_size);
 
-    ff_cbs_fragment_reset(ctx->cbc, au);
+    ff_cbs_fragment_reset(au);
 
     return 0;
 }
@@ -417,7 +417,7 @@ static int h265_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
     // If an AUD is present, it must be the first NAL unit.
     if (au->units[0].type == HEVC_NAL_AUD) {
         if (ctx->aud == REMOVE)
-            ff_cbs_delete_unit(ctx->cbc, au, 0);
+            ff_cbs_delete_unit(au, 0);
     } else {
         if (ctx->aud == INSERT) {
             H265RawAUD *aud = &ctx->aud_nal;
@@ -449,8 +449,7 @@ static int h265_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
             };
             aud->pic_type = pic_type;
 
-            err = ff_cbs_insert_unit_content(ctx->cbc, au,
-                                             0, HEVC_NAL_AUD, aud, NULL);
+            err = ff_cbs_insert_unit_content(au, 0, HEVC_NAL_AUD, aud, NULL);
             if (err < 0) {
                 av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
                 goto fail;
@@ -482,7 +481,7 @@ static int h265_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, au);
+    ff_cbs_fragment_reset(au);
 
     if (err < 0)
         av_packet_unref(pkt);
@@ -532,7 +531,7 @@ static int h265_metadata_init(AVBSFContext *bsf)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -540,7 +539,7 @@ static void h265_metadata_close(AVBSFContext *bsf)
 {
     H265MetadataContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->access_unit);
+    ff_cbs_fragment_free(&ctx->access_unit);
     ff_cbs_close(&ctx->cbc);
 }
 
diff --git a/libavcodec/mpeg2_metadata_bsf.c b/libavcodec/mpeg2_metadata_bsf.c
index b1e2d6128a..d0048c0e25 100644
--- a/libavcodec/mpeg2_metadata_bsf.c
+++ b/libavcodec/mpeg2_metadata_bsf.c
@@ -137,7 +137,7 @@ static int mpeg2_metadata_update_fragment(AVBSFContext *bsf,
                     se->vertical_size_extension << 12 | sh->vertical_size_value,
             };
 
-            err = ff_cbs_insert_unit_content(ctx->cbc, frag, se_pos + 1,
+            err = ff_cbs_insert_unit_content(frag, se_pos + 1,
                                              MPEG2_START_EXTENSION,
                                              &ctx->sequence_display_extension,
                                              NULL);
@@ -200,7 +200,7 @@ static int mpeg2_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
 
     if (err < 0)
         av_packet_unref(pkt);
@@ -252,7 +252,7 @@ static int mpeg2_metadata_init(AVBSFContext *bsf)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
     return err;
 }
 
@@ -260,7 +260,7 @@ static void mpeg2_metadata_close(AVBSFContext *bsf)
 {
     MPEG2MetadataContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->fragment);
+    ff_cbs_fragment_free(&ctx->fragment);
     ff_cbs_close(&ctx->cbc);
 }
 
diff --git a/libavcodec/trace_headers_bsf.c b/libavcodec/trace_headers_bsf.c
index 8ee4dbd668..b891730bac 100644
--- a/libavcodec/trace_headers_bsf.c
+++ b/libavcodec/trace_headers_bsf.c
@@ -52,7 +52,7 @@ static int trace_headers_init(AVBSFContext *bsf)
 
         err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
 
-        ff_cbs_fragment_reset(ctx->cbc, frag);
+        ff_cbs_fragment_reset(frag);
     }
 
     return err;
@@ -62,7 +62,7 @@ static void trace_headers_close(AVBSFContext *bsf)
 {
     TraceHeadersContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->fragment);
+    ff_cbs_fragment_free(&ctx->fragment);
     ff_cbs_close(&ctx->cbc);
 }
 
@@ -97,7 +97,7 @@ static int trace_headers(AVBSFContext *bsf, AVPacket *pkt)
 
     err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
 
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
 
     if (err < 0)
         av_packet_unref(pkt);
diff --git a/libavcodec/vaapi_encode_h264.c b/libavcodec/vaapi_encode_h264.c
index b8d9c7b507..5e1683e851 100644
--- a/libavcodec/vaapi_encode_h264.c
+++ b/libavcodec/vaapi_encode_h264.c
@@ -135,11 +135,10 @@ static int vaapi_encode_h264_add_nal(AVCodecContext *avctx,
                                      CodedBitstreamFragment *au,
                                      void *nal_unit)
 {
-    VAAPIEncodeH264Context *priv = avctx->priv_data;
     H264RawNALUnitHeader *header = nal_unit;
     int err;
 
-    err = ff_cbs_insert_unit_content(priv->cbc, au, -1,
+    err = ff_cbs_insert_unit_content(au, -1,
                                      header->nal_unit_type, nal_unit, NULL);
     if (err < 0) {
         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
@@ -174,7 +173,7 @@ static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 
     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 fail:
-    ff_cbs_fragment_reset(priv->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -200,7 +199,7 @@ static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 
     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 fail:
-    ff_cbs_fragment_reset(priv->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -264,7 +263,7 @@ static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
         if (err < 0)
             goto fail;
 
-        ff_cbs_fragment_reset(priv->cbc, au);
+        ff_cbs_fragment_reset(au);
 
         *type = VAEncPackedHeaderRawData;
         return 0;
@@ -286,7 +285,7 @@ static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
     }
 
 fail:
-    ff_cbs_fragment_reset(priv->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -1242,7 +1241,7 @@ static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
 {
     VAAPIEncodeH264Context *priv = avctx->priv_data;
 
-    ff_cbs_fragment_free(priv->cbc, &priv->current_access_unit);
+    ff_cbs_fragment_free(&priv->current_access_unit);
     ff_cbs_close(&priv->cbc);
     av_freep(&priv->sei_identifier_string);
 
diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index c42d51592c..045a0261a1 100644
--- a/libavcodec/vaapi_encode_h265.c
+++ b/libavcodec/vaapi_encode_h265.c
@@ -116,11 +116,10 @@ static int vaapi_encode_h265_add_nal(AVCodecContext *avctx,
                                      CodedBitstreamFragment *au,
                                      void *nal_unit)
 {
-    VAAPIEncodeH265Context *priv = avctx->priv_data;
     H265RawNALUnitHeader *header = nal_unit;
     int err;
 
-    err = ff_cbs_insert_unit_content(priv->cbc, au, -1,
+    err = ff_cbs_insert_unit_content(au, -1,
                                      header->nal_unit_type, nal_unit, NULL);
     if (err < 0) {
         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
@@ -159,7 +158,7 @@ static int vaapi_encode_h265_write_sequence_header(AVCodecContext *avctx,
 
     err = vaapi_encode_h265_write_access_unit(avctx, data, data_len, au);
 fail:
-    ff_cbs_fragment_reset(priv->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -185,7 +184,7 @@ static int vaapi_encode_h265_write_slice_header(AVCodecContext *avctx,
 
     err = vaapi_encode_h265_write_access_unit(avctx, data, data_len, au);
 fail:
-    ff_cbs_fragment_reset(priv->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -242,7 +241,7 @@ static int vaapi_encode_h265_write_extra_header(AVCodecContext *avctx,
         if (err < 0)
             goto fail;
 
-        ff_cbs_fragment_reset(priv->cbc, au);
+        ff_cbs_fragment_reset(au);
 
         *type = VAEncPackedHeaderRawData;
         return 0;
@@ -251,7 +250,7 @@ static int vaapi_encode_h265_write_extra_header(AVCodecContext *avctx,
     }
 
 fail:
-    ff_cbs_fragment_reset(priv->cbc, au);
+    ff_cbs_fragment_reset(au);
     return err;
 }
 
@@ -1188,7 +1187,7 @@ static av_cold int vaapi_encode_h265_close(AVCodecContext *avctx)
 {
     VAAPIEncodeH265Context *priv = avctx->priv_data;
 
-    ff_cbs_fragment_free(priv->cbc, &priv->current_access_unit);
+    ff_cbs_fragment_free(&priv->current_access_unit);
     ff_cbs_close(&priv->cbc);
 
     return ff_vaapi_encode_close(avctx);
diff --git a/libavcodec/vaapi_encode_mjpeg.c b/libavcodec/vaapi_encode_mjpeg.c
index 6974ab2cad..557f59f00c 100644
--- a/libavcodec/vaapi_encode_mjpeg.c
+++ b/libavcodec/vaapi_encode_mjpeg.c
@@ -90,34 +90,34 @@ static int vaapi_encode_mjpeg_write_image_header(AVCodecContext *avctx,
     int err;
 
     if (priv->jfif) {
-        err = ff_cbs_insert_unit_content(priv->cbc, frag, -1,
+        err = ff_cbs_insert_unit_content(frag, -1,
                                          JPEG_MARKER_APPN + 0,
                                          &priv->jfif_header, NULL);
         if (err < 0)
             goto fail;
     }
 
-    err = ff_cbs_insert_unit_content(priv->cbc, frag, -1,
+    err = ff_cbs_insert_unit_content(frag, -1,
                                      JPEG_MARKER_DQT,
                                      &priv->quant_tables, NULL);
     if (err < 0)
         goto fail;
 
-    err = ff_cbs_insert_unit_content(priv->cbc, frag, -1,
+    err = ff_cbs_insert_unit_content(frag, -1,
                                      JPEG_MARKER_SOF0,
                                      &priv->frame_header, NULL);
     if (err < 0)
         goto fail;
 
     if (priv->huffman) {
-        err = ff_cbs_insert_unit_content(priv->cbc, frag, -1,
+        err = ff_cbs_insert_unit_content(frag, -1,
                                          JPEG_MARKER_DHT,
                                          &priv->huffman_tables, NULL);
         if (err < 0)
             goto fail;
     }
 
-    err = ff_cbs_insert_unit_content(priv->cbc, frag, -1,
+    err = ff_cbs_insert_unit_content(frag, -1,
                                      JPEG_MARKER_SOS,
                                      &priv->scan, NULL);
     if (err < 0)
@@ -142,7 +142,7 @@ static int vaapi_encode_mjpeg_write_image_header(AVCodecContext *avctx,
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(priv->cbc, frag);
+    ff_cbs_fragment_reset(frag);
     return err;
 }
 
@@ -519,7 +519,7 @@ static av_cold int vaapi_encode_mjpeg_close(AVCodecContext *avctx)
 {
     VAAPIEncodeMJPEGContext *priv = avctx->priv_data;
 
-    ff_cbs_fragment_free(priv->cbc, &priv->current_fragment);
+    ff_cbs_fragment_free(&priv->current_fragment);
     ff_cbs_close(&priv->cbc);
 
     return ff_vaapi_encode_close(avctx);
diff --git a/libavcodec/vaapi_encode_mpeg2.c b/libavcodec/vaapi_encode_mpeg2.c
index 1dcc84d75c..b8f1c06d0f 100644
--- a/libavcodec/vaapi_encode_mpeg2.c
+++ b/libavcodec/vaapi_encode_mpeg2.c
@@ -93,10 +93,9 @@ static int vaapi_encode_mpeg2_add_header(AVCodecContext *avctx,
                                          CodedBitstreamFragment *frag,
                                          int type, void *header)
 {
-    VAAPIEncodeMPEG2Context *priv = avctx->priv_data;
     int err;
 
-    err = ff_cbs_insert_unit_content(priv->cbc, frag, -1, type, header, NULL);
+    err = ff_cbs_insert_unit_content(frag, -1, type, header, NULL);
     if (err < 0) {
         av_log(avctx, AV_LOG_ERROR, "Failed to add header: "
                "type = %d.\n", type);
@@ -135,7 +134,7 @@ static int vaapi_encode_mpeg2_write_sequence_header(AVCodecContext *avctx,
 
     err = vaapi_encode_mpeg2_write_fragment(avctx, data, data_len, frag);
 fail:
-    ff_cbs_fragment_reset(priv->cbc, frag);
+    ff_cbs_fragment_reset(frag);
     return 0;
 }
 
@@ -159,7 +158,7 @@ static int vaapi_encode_mpeg2_write_picture_header(AVCodecContext *avctx,
 
     err = vaapi_encode_mpeg2_write_fragment(avctx, data, data_len, frag);
 fail:
-    ff_cbs_fragment_reset(priv->cbc, frag);
+    ff_cbs_fragment_reset(frag);
     return 0;
 }
 
@@ -633,7 +632,7 @@ static av_cold int vaapi_encode_mpeg2_close(AVCodecContext *avctx)
 {
     VAAPIEncodeMPEG2Context *priv = avctx->priv_data;
 
-    ff_cbs_fragment_free(priv->cbc, &priv->current_fragment);
+    ff_cbs_fragment_free(&priv->current_fragment);
     ff_cbs_close(&priv->cbc);
 
     return ff_vaapi_encode_close(avctx);
diff --git a/libavcodec/vp9_metadata_bsf.c b/libavcodec/vp9_metadata_bsf.c
index 2ca494e695..00a5580c4d 100644
--- a/libavcodec/vp9_metadata_bsf.c
+++ b/libavcodec/vp9_metadata_bsf.c
@@ -98,7 +98,7 @@ static int vp9_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 
     err = 0;
 fail:
-    ff_cbs_fragment_reset(ctx->cbc, frag);
+    ff_cbs_fragment_reset(frag);
 
     if (err < 0)
         av_packet_unref(pkt);
@@ -117,7 +117,7 @@ static void vp9_metadata_close(AVBSFContext *bsf)
 {
     VP9MetadataContext *ctx = bsf->priv_data;
 
-    ff_cbs_fragment_free(ctx->cbc, &ctx->fragment);
+    ff_cbs_fragment_free(&ctx->fragment);
     ff_cbs_close(&ctx->cbc);
 }