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cbs: ff_cbs_delete_unit: Replace return value with assert 

ff_cbs_delete_unit never fails if the index of the unit to delete is
valid, as it is with all current callers of the function. So just assert
in ff_cbs_delete_unit that the index is valid and change the return
value to void in order to remove the callers' checks for whether
ff_cbs_delete_unit failed.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-07-08 01:14:01 +02:00 committed by Mark Thompson
parent 70a4f46e48
commit 730e5be3aa
6 changed files with 17 additions and 30 deletions
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9
libavcodec/av1_metadata_bsf.c
View File

@ -167,13 +167,8 @@ 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) {
err = ff_cbs_delete_unit(ctx->cbc, frag, i);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to delete Padding OBU.\n");
goto fail;
}
}
if (frag->units[i].type == AV1_OBU_PADDING)
ff_cbs_delete_unit(ctx->cbc, frag, i);
}
}

12
libavcodec/cbs.c
View File

@ -737,12 +737,12 @@ int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
return 0;
}
int ff_cbs_delete_unit(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag,
int position)
void ff_cbs_delete_unit(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag,
int position)
{
if (position < 0 || position >= frag->nb_units)
return AVERROR(EINVAL);
av_assert0(0 <= position && position < frag->nb_units
&& "Unit to be deleted not in fragment.");
cbs_unit_uninit(ctx, &frag->units[position]);
@ -752,6 +752,4 @@ int ff_cbs_delete_unit(CodedBitstreamContext *ctx,
memmove(frag->units + position,
frag->units + position + 1,
(frag->nb_units - position) * sizeof(*frag->units));
return 0;
}

8
libavcodec/cbs.h
View File

@ -380,10 +380,12 @@ int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
/**
* Delete a unit from a fragment and free all memory it uses.
*
* Requires position to be >= 0 and < frag->nb_units.
*/
int ff_cbs_delete_unit(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag,
int position);
void ff_cbs_delete_unit(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag,
int position);
#endif /* AVCODEC_CBS_H */

6
libavcodec/cbs_h2645.c
View File

@ -1664,7 +1664,7 @@ int ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
}
av_assert0(i < au->nb_units && "NAL unit not in access unit.");
return ff_cbs_delete_unit(ctx, au, i);
ff_cbs_delete_unit(ctx, au, i);
} else {
cbs_h264_free_sei_payload(&sei->payload[position]);
@ -1672,7 +1672,7 @@ int ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
memmove(sei->payload + position,
sei->payload + position + 1,
(sei->payload_count - position) * sizeof(*sei->payload));
return 0;
}
return 0;
}

8
libavcodec/h264_metadata_bsf.c
View File

@ -427,13 +427,7 @@ 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) {
// Filler NAL units.
err = ff_cbs_delete_unit(ctx->cbc, au, i);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to delete "
"filler NAL.\n");
goto fail;
}
ff_cbs_delete_unit(ctx->cbc, au, i);
continue;
}

4
libavcodec/h264_redundant_pps_bsf.c
View File

@ -94,9 +94,7 @@ 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);
err = ff_cbs_delete_unit(ctx->input, au, i);
if (err < 0)
goto fail;
ff_cbs_delete_unit(ctx->input, au, i);
i--;
continue;
}