[FFmpeg-devel] [PATCH 1/3] avcodec/cbs: add a new init function
James Almer
jamrial at gmail.com
Fri May 23 06:10:19 EEST 2025
And rename the existing one to ff_cbs_alloc().
This will allow for more versatility when setting options in a module, allowing
them to be taken into account when calling module specific init functions.
Signed-off-by: James Almer <jamrial at gmail.com>
---
libavcodec/apv_decode.c | 6 +++++-
libavcodec/apv_parser.c | 6 +++++-
libavcodec/av1_parser.c | 6 +++++-
libavcodec/av1dec.c | 14 +++++++++++---
libavcodec/bsf/av1_frame_merge.c | 16 ++++++++++++++--
libavcodec/bsf/av1_frame_split.c | 6 +++++-
libavcodec/bsf/dts2pts.c | 6 +++++-
libavcodec/bsf/filter_units.c | 6 +++++-
libavcodec/bsf/trace_headers.c | 2 +-
libavcodec/cbs.c | 28 +++++++++++++++++++++++++++-
libavcodec/cbs.h | 10 ++++++++--
libavcodec/cbs_bsf.c | 12 ++++++++++--
libavcodec/cbs_internal.h | 3 +++
libavcodec/d3d12va_encode_hevc.c | 6 +++++-
libavcodec/vaapi_encode_av1.c | 6 +++++-
libavcodec/vaapi_encode_h264.c | 6 +++++-
libavcodec/vaapi_encode_h265.c | 6 +++++-
libavcodec/vaapi_encode_mjpeg.c | 6 +++++-
libavcodec/vaapi_encode_mpeg2.c | 6 +++++-
libavcodec/vulkan_encode_h264.c | 12 ++++++++++--
libavcodec/vulkan_encode_h265.c | 12 ++++++++++--
libavcodec/vvc/dec.c | 6 +++++-
libavcodec/vvc_parser.c | 5 ++++-
libavformat/movenccenc.c | 6 +++++-
24 files changed, 168 insertions(+), 30 deletions(-)
diff --git a/libavcodec/apv_decode.c b/libavcodec/apv_decode.c
index eb47298e2e..3667933df6 100644
--- a/libavcodec/apv_decode.c
+++ b/libavcodec/apv_decode.c
@@ -119,7 +119,11 @@ static av_cold int apv_decode_init(AVCodecContext *avctx)
ff_thread_once(&apv_entropy_once, apv_entropy_build_decode_lut);
- err = ff_cbs_init(&apv->cbc, AV_CODEC_ID_APV, avctx);
+ err = ff_cbs_alloc(&apv->cbc, AV_CODEC_ID_APV, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(apv->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/apv_parser.c b/libavcodec/apv_parser.c
index fdd575339b..e0aa152ca8 100644
--- a/libavcodec/apv_parser.c
+++ b/libavcodec/apv_parser.c
@@ -122,7 +122,11 @@ static av_cold int init(AVCodecParserContext *s)
APVParseContext *p = s->priv_data;
int ret;
- ret = ff_cbs_init(&p->cbc, AV_CODEC_ID_APV, NULL);
+ ret = ff_cbs_alloc(&p->cbc, AV_CODEC_ID_APV, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = ff_cbs_init(p->cbc, NULL);
if (ret < 0)
return ret;
diff --git a/libavcodec/av1_parser.c b/libavcodec/av1_parser.c
index 1792e813f4..77906d0c91 100644
--- a/libavcodec/av1_parser.c
+++ b/libavcodec/av1_parser.c
@@ -190,13 +190,17 @@ static av_cold int av1_parser_init(AVCodecParserContext *ctx)
AV1ParseContext *s = ctx->priv_data;
int ret;
- ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
+ ret = ff_cbs_alloc(&s->cbc, AV_CODEC_ID_AV1, NULL);
if (ret < 0)
return ret;
s->cbc->decompose_unit_types = decompose_unit_types;
s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
+ ret = ff_cbs_init(s->cbc, NULL);
+ if (ret < 0)
+ return ret;
+
return 0;
}
diff --git a/libavcodec/av1dec.c b/libavcodec/av1dec.c
index 8ff1bf394c..3130364534 100644
--- a/libavcodec/av1dec.c
+++ b/libavcodec/av1dec.c
@@ -858,6 +858,7 @@ static av_cold int av1_decode_init(AVCodecContext *avctx)
{
AV1DecContext *s = avctx->priv_data;
AV1RawSequenceHeader *seq;
+ AVDictionary *options = NULL;
const AVPacketSideData *sd;
int ret;
@@ -865,20 +866,27 @@ static av_cold int av1_decode_init(AVCodecContext *avctx)
s->pkt = avctx->internal->in_pkt;
s->pix_fmt = AV_PIX_FMT_NONE;
- ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, avctx);
+ ret = ff_cbs_alloc(&s->cbc, AV_CODEC_ID_AV1, avctx);
if (ret < 0)
return ret;
s->cbc->decompose_unit_types = decompose_unit_types;
s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
+ ret = av_dict_set_int(&options, "operating_point", s->operating_point, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = ff_cbs_init(s->cbc, &options);
+ av_dict_free(&options);
+ if (ret < 0)
+ return ret;
+
s->itut_t35_fifo = av_fifo_alloc2(1, sizeof(AV1RawMetadataITUTT35),
AV_FIFO_FLAG_AUTO_GROW);
if (!s->itut_t35_fifo)
return AVERROR(ENOMEM);
- av_opt_set_int(s->cbc->priv_data, "operating_point", s->operating_point, 0);
-
if (avctx->extradata && avctx->extradata_size) {
ret = ff_cbs_read_extradata_from_codec(s->cbc,
&s->current_obu,
diff --git a/libavcodec/bsf/av1_frame_merge.c b/libavcodec/bsf/av1_frame_merge.c
index 4c54f2167e..530688be49 100644
--- a/libavcodec/bsf/av1_frame_merge.c
+++ b/libavcodec/bsf/av1_frame_merge.c
@@ -133,11 +133,23 @@ static int av1_frame_merge_init(AVBSFContext *bsf)
if (!ctx->in || !ctx->pkt)
return AVERROR(ENOMEM);
- err = ff_cbs_init(&ctx->input, AV_CODEC_ID_AV1, bsf);
+ err = ff_cbs_alloc(&ctx->input, AV_CODEC_ID_AV1, bsf);
if (err < 0)
return err;
- return ff_cbs_init(&ctx->output, AV_CODEC_ID_AV1, bsf);
+ err = ff_cbs_alloc(&ctx->output, AV_CODEC_ID_AV1, bsf);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(ctx->input, NULL);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(ctx->output, NULL);
+ if (err < 0)
+ return err;
+
+ return 0;
}
static void av1_frame_merge_close(AVBSFContext *bsf)
diff --git a/libavcodec/bsf/av1_frame_split.c b/libavcodec/bsf/av1_frame_split.c
index 5f6a40316c..a64e9178e7 100644
--- a/libavcodec/bsf/av1_frame_split.c
+++ b/libavcodec/bsf/av1_frame_split.c
@@ -210,7 +210,11 @@ static int av1_frame_split_init(AVBSFContext *ctx)
if (!s->buffer_pkt)
return AVERROR(ENOMEM);
- ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, ctx);
+ ret = ff_cbs_alloc(&s->cbc, AV_CODEC_ID_AV1, ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = ff_cbs_init(s->cbc, NULL);
if (ret < 0)
return ret;
diff --git a/libavcodec/bsf/dts2pts.c b/libavcodec/bsf/dts2pts.c
index 9d31d7dc08..189a9f9678 100644
--- a/libavcodec/bsf/dts2pts.c
+++ b/libavcodec/bsf/dts2pts.c
@@ -402,7 +402,11 @@ static int dts2pts_init(AVBSFContext *ctx)
if (!s->node_pool)
return AVERROR(ENOMEM);
- ret = ff_cbs_init(&s->cbc, ctx->par_in->codec_id, ctx);
+ ret = ff_cbs_alloc(&s->cbc, ctx->par_in->codec_id, ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = ff_cbs_init(s->cbc, NULL);
if (ret < 0)
return ret;
diff --git a/libavcodec/bsf/filter_units.c b/libavcodec/bsf/filter_units.c
index 336331733f..0edf2fa472 100644
--- a/libavcodec/bsf/filter_units.c
+++ b/libavcodec/bsf/filter_units.c
@@ -187,7 +187,11 @@ static int filter_units_init(AVBSFContext *bsf)
return 0;
}
- err = ff_cbs_init(&ctx->cbc, bsf->par_in->codec_id, bsf);
+ err = ff_cbs_alloc(&ctx->cbc, bsf->par_in->codec_id, bsf);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(ctx->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/bsf/trace_headers.c b/libavcodec/bsf/trace_headers.c
index 8781f5f100..e885f7a73f 100644
--- a/libavcodec/bsf/trace_headers.c
+++ b/libavcodec/bsf/trace_headers.c
@@ -38,7 +38,7 @@ static int trace_headers_init(AVBSFContext *bsf)
TraceHeadersContext *ctx = bsf->priv_data;
int err;
- err = ff_cbs_init(&ctx->cbc, bsf->par_in->codec_id, bsf);
+ err = ff_cbs_alloc(&ctx->cbc, bsf->par_in->codec_id, bsf);
if (err < 0)
return err;
diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index 6b2ebe597d..8c0659f7af 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -21,6 +21,7 @@
#include "libavutil/avassert.h"
#include "libavutil/buffer.h"
#include "libavutil/common.h"
+#include "libavutil/dict.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
@@ -91,7 +92,7 @@ const enum AVCodecID CBS_FUNC(all_codec_ids)[] = {
AV_CODEC_ID_NONE
};
-av_cold int CBS_FUNC(init)(CodedBitstreamContext **ctx_ptr,
+av_cold int CBS_FUNC(alloc)(CodedBitstreamContext **ctx_ptr,
enum AVCodecID codec_id, void *log_ctx)
{
CodedBitstreamContext *ctx;
@@ -137,6 +138,31 @@ av_cold int CBS_FUNC(init)(CodedBitstreamContext **ctx_ptr,
return 0;
}
+av_cold int CBS_FUNC(init)(CodedBitstreamContext *ctx, AVDictionary **options)
+{
+ int err;
+
+ if (!ctx->codec)
+ return AVERROR(EINVAL);
+
+ if (ctx->codec->priv_data_size) {
+ if (!ctx->priv_data)
+ return AVERROR(EINVAL);
+
+ err = av_opt_set_dict2(ctx->priv_data, options, 0);
+ if (err < 0)
+ return err;
+ }
+
+ if (ctx->codec->init) {
+ err = ctx->codec->init(ctx);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
av_cold void CBS_FUNC(flush)(CodedBitstreamContext *ctx)
{
if (ctx->codec->flush)
diff --git a/libavcodec/cbs.h b/libavcodec/cbs.h
index 67f2ec9e50..5b0e1f5c6b 100644
--- a/libavcodec/cbs.h
+++ b/libavcodec/cbs.h
@@ -176,6 +176,7 @@ typedef struct CodedBitstreamFragment {
} CodedBitstreamFragment;
+struct AVDictionary;
struct CodedBitstreamContext;
struct GetBitContext;
struct PutBitContext;
@@ -305,11 +306,16 @@ extern const enum AVCodecID CBS_FUNC(all_codec_ids)[];
/**
- * Create and initialise a new context for the given codec.
+ * Create a new context for the given codec.
*/
-int CBS_FUNC(init)(CodedBitstreamContext **ctx,
+int CBS_FUNC(alloc)(CodedBitstreamContext **ctx,
enum AVCodecID codec_id, void *log_ctx);
+/**
+ * Initialise a context.
+ */
+int CBS_FUNC(init)(CodedBitstreamContext *ctx, struct AVDictionary **options);
+
/**
* Reset all internal state in a context.
*/
diff --git a/libavcodec/cbs_bsf.c b/libavcodec/cbs_bsf.c
index b25285483b..25b9e730d8 100644
--- a/libavcodec/cbs_bsf.c
+++ b/libavcodec/cbs_bsf.c
@@ -115,11 +115,19 @@ int ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type)
ctx->type = type;
- err = ff_cbs_init(&ctx->input, type->codec_id, bsf);
+ err = ff_cbs_alloc(&ctx->input, type->codec_id, bsf);
if (err < 0)
return err;
- err = ff_cbs_init(&ctx->output, type->codec_id, bsf);
+ err = ff_cbs_alloc(&ctx->output, type->codec_id, bsf);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(ctx->input, NULL);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(ctx->output, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/cbs_internal.h b/libavcodec/cbs_internal.h
index c3265924ba..734269d368 100644
--- a/libavcodec/cbs_internal.h
+++ b/libavcodec/cbs_internal.h
@@ -184,6 +184,9 @@ typedef struct CodedBitstreamType {
int (*assemble_fragment)(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag);
+ // Initialize the codec internal state.
+ int (*init)(CodedBitstreamContext *ctx);
+
// Reset the codec internal state.
void (*flush)(CodedBitstreamContext *ctx);
diff --git a/libavcodec/d3d12va_encode_hevc.c b/libavcodec/d3d12va_encode_hevc.c
index 938ba01f54..5317e2f850 100644
--- a/libavcodec/d3d12va_encode_hevc.c
+++ b/libavcodec/d3d12va_encode_hevc.c
@@ -442,7 +442,11 @@ static int d3d12va_encode_hevc_configure(AVCodecContext *avctx)
int fixed_qp_idr, fixed_qp_p, fixed_qp_b;
int err;
- err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_HEVC, avctx);
+ err = ff_cbs_alloc(&priv->cbc, AV_CODEC_ID_HEVC, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(priv->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vaapi_encode_av1.c b/libavcodec/vaapi_encode_av1.c
index f3df5baddc..f80efd006e 100644
--- a/libavcodec/vaapi_encode_av1.c
+++ b/libavcodec/vaapi_encode_av1.c
@@ -128,7 +128,7 @@ static av_cold int vaapi_encode_av1_configure(AVCodecContext *avctx)
VAAPIEncodeAV1Context *priv = avctx->priv_data;
int ret;
- ret = ff_cbs_init(&priv->cbc, AV_CODEC_ID_AV1, avctx);
+ ret = ff_cbs_alloc(&priv->cbc, AV_CODEC_ID_AV1, avctx);
if (ret < 0)
return ret;
priv->cbc->trace_enable = 1;
@@ -136,6 +136,10 @@ static av_cold int vaapi_encode_av1_configure(AVCodecContext *avctx)
priv->cbc->trace_context = ctx;
priv->cbc->trace_write_callback = vaapi_encode_av1_trace_write_log;
+ ret = ff_cbs_init(priv->cbc, NULL);
+ if (ret < 0)
+ return ret;
+
if (ctx->rc_mode->quality) {
priv->q_idx_p = av_clip(ctx->rc_quality, 0, AV1_MAX_QUANT);
if (fabs(avctx->i_quant_factor) > 0.0)
diff --git a/libavcodec/vaapi_encode_h264.c b/libavcodec/vaapi_encode_h264.c
index 0cd5b0ac50..7c98833944 100644
--- a/libavcodec/vaapi_encode_h264.c
+++ b/libavcodec/vaapi_encode_h264.c
@@ -874,7 +874,11 @@ static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
VAAPIEncodeH264Context *priv = avctx->priv_data;
int err;
- err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
+ err = ff_cbs_alloc(&priv->cbc, AV_CODEC_ID_H264, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(priv->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index 2acde2296b..0cfe67735b 100644
--- a/libavcodec/vaapi_encode_h265.c
+++ b/libavcodec/vaapi_encode_h265.c
@@ -967,7 +967,11 @@ static av_cold int vaapi_encode_h265_configure(AVCodecContext *avctx)
VAAPIEncodeH265Context *priv = avctx->priv_data;
int err;
- err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_HEVC, avctx);
+ err = ff_cbs_alloc(&priv->cbc, AV_CODEC_ID_HEVC, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(priv->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vaapi_encode_mjpeg.c b/libavcodec/vaapi_encode_mjpeg.c
index 2eef5bf090..5a7915cec4 100644
--- a/libavcodec/vaapi_encode_mjpeg.c
+++ b/libavcodec/vaapi_encode_mjpeg.c
@@ -474,7 +474,11 @@ static av_cold int vaapi_encode_mjpeg_configure(AVCodecContext *avctx)
ctx->va_packed_headers |= VA_ENC_PACKED_HEADER_SLICE;
}
- err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_MJPEG, avctx);
+ err = ff_cbs_alloc(&priv->cbc, AV_CODEC_ID_MJPEG, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(priv->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vaapi_encode_mpeg2.c b/libavcodec/vaapi_encode_mpeg2.c
index 94cb3d4fb6..3e0b7f9ed9 100644
--- a/libavcodec/vaapi_encode_mpeg2.c
+++ b/libavcodec/vaapi_encode_mpeg2.c
@@ -519,7 +519,11 @@ static av_cold int vaapi_encode_mpeg2_configure(AVCodecContext *avctx)
VAAPIEncodeMPEG2Context *priv = avctx->priv_data;
int err;
- err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_MPEG2VIDEO, avctx);
+ err = ff_cbs_alloc(&priv->cbc, AV_CODEC_ID_MPEG2VIDEO, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(priv->cbc, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vulkan_encode_h264.c b/libavcodec/vulkan_encode_h264.c
index f31b6d4069..be3edfe0d7 100644
--- a/libavcodec/vulkan_encode_h264.c
+++ b/libavcodec/vulkan_encode_h264.c
@@ -1057,10 +1057,14 @@ static int parse_feedback_units(AVCodecContext *avctx,
CodedBitstreamContext *cbs;
CodedBitstreamFragment au = { 0 };
- err = ff_cbs_init(&cbs, AV_CODEC_ID_H264, avctx);
+ err = ff_cbs_alloc(&cbs, AV_CODEC_ID_H264, avctx);
if (err < 0)
return err;
+ err = ff_cbs_init(cbs, NULL);
+ if (err < 0)
+ goto fail;
+
err = ff_cbs_read(cbs, &au, NULL, data, size);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Unable to parse feedback units, bad drivers: %s\n",
@@ -1540,7 +1544,11 @@ static av_cold int vulkan_encode_h264_init(AVCodecContext *avctx)
}
/* Init CBS */
- err = ff_cbs_init(&enc->cbs, AV_CODEC_ID_H264, avctx);
+ err = ff_cbs_alloc(&enc->cbs, AV_CODEC_ID_H264, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(enc->cbs, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vulkan_encode_h265.c b/libavcodec/vulkan_encode_h265.c
index d81d2de95a..af13edeec4 100644
--- a/libavcodec/vulkan_encode_h265.c
+++ b/libavcodec/vulkan_encode_h265.c
@@ -1210,10 +1210,14 @@ static int parse_feedback_units(AVCodecContext *avctx,
CodedBitstreamContext *cbs;
CodedBitstreamFragment au = { 0 };
- err = ff_cbs_init(&cbs, AV_CODEC_ID_HEVC, avctx);
+ err = ff_cbs_alloc(&cbs, AV_CODEC_ID_HEVC, avctx);
if (err < 0)
return err;
+ err = ff_cbs_init(cbs, NULL);
+ if (err < 0)
+ goto fail;
+
err = ff_cbs_read(cbs, &au, NULL, data, size);
if (err < 0) {
av_log(avctx, AV_LOG_ERROR, "Unable to parse feedback units, bad drivers: %s\n",
@@ -1677,7 +1681,11 @@ static av_cold int vulkan_encode_h265_init(AVCodecContext *avctx)
base_ctx->decode_delay = base_ctx->max_b_depth;
/* Init CBS */
- err = ff_cbs_init(&enc->cbs, AV_CODEC_ID_HEVC, avctx);
+ err = ff_cbs_alloc(&enc->cbs, AV_CODEC_ID_HEVC, avctx);
+ if (err < 0)
+ return err;
+
+ err = ff_cbs_init(enc->cbs, NULL);
if (err < 0)
return err;
diff --git a/libavcodec/vvc/dec.c b/libavcodec/vvc/dec.c
index 49ba47d5d4..662e5edc60 100644
--- a/libavcodec/vvc/dec.c
+++ b/libavcodec/vvc/dec.c
@@ -1120,10 +1120,14 @@ static av_cold int vvc_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
- ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_VVC, avctx);
+ ret = ff_cbs_alloc(&s->cbc, AV_CODEC_ID_VVC, avctx);
if (ret)
return ret;
+ ret = ff_cbs_init(s->cbc, NULL);
+ if (ret < 0)
+ return ret;
+
if (avctx->extradata_size > 0 && avctx->extradata) {
ret = ff_cbs_read_extradata_from_codec(s->cbc, &s->current_frame, avctx);
if (ret < 0)
diff --git a/libavcodec/vvc_parser.c b/libavcodec/vvc_parser.c
index c9c3a3949f..8b3c794dbe 100644
--- a/libavcodec/vvc_parser.c
+++ b/libavcodec/vvc_parser.c
@@ -482,7 +482,10 @@ static av_cold int vvc_parser_init(AVCodecParserContext *s)
VVCParserContext *ctx = s->priv_data;
int ret;
- ret = ff_cbs_init(&ctx->cbc, AV_CODEC_ID_VVC, NULL);
+ ret = ff_cbs_alloc(&ctx->cbc, AV_CODEC_ID_VVC, NULL);
+ if (ret < 0)
+ return ret;
+ ret = ff_cbs_init(ctx->cbc, NULL);
if (ret < 0)
return ret;
au_detector_init(&ctx->au_detector);
diff --git a/libavformat/movenccenc.c b/libavformat/movenccenc.c
index 32094ebd7b..7966a978a8 100644
--- a/libavformat/movenccenc.c
+++ b/libavformat/movenccenc.c
@@ -618,7 +618,11 @@ int ff_mov_cenc_init(MOVMuxCencContext* ctx, uint8_t* encryption_key,
ctx->use_subsamples = use_subsamples;
if (codec_id == AV_CODEC_ID_AV1) {
- ret = ff_lavf_cbs_init(&ctx->cbc, codec_id, NULL);
+ ret = ff_lavf_cbs_alloc(&ctx->cbc, codec_id, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = ff_lavf_cbs_init(ctx->cbc, NULL);
if (ret < 0)
return ret;
--
2.49.0
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