static int filter_units_filter(AVBSFContext *bsf, AVPacket *out)
{
FilterUnitsContext *ctx = bsf->priv_data;
CodedBitstreamFragment *frag = &ctx->fragment;
AVPacket *in = NULL;
int err, i, j;
while (1) {
err = ff_bsf_get_packet(bsf, &in);
if (err < 0)
return err;
if (ctx->mode == NOOP) {
av_packet_move_ref(out, in);
av_packet_free(&in);
return 0;
}
err = ff_cbs_read_packet(ctx->cbc, frag, in);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
goto fail;
}
for (i = 0; i < frag->nb_units; i++) {
for (j = 0; j < ctx->nb_types; j++) {
if (frag->units[i].type == ctx->type_list[j])
break;
}
if (ctx->mode == REMOVE ? j < ctx->nb_types
: j >= ctx->nb_types) {
ff_cbs_delete_unit(ctx->cbc, frag, i);
--i;
}
}
if (frag->nb_units > 0)
break;
// Don't return packets with nothing in them.
av_packet_free(&in);
ff_cbs_fragment_uninit(ctx->cbc, frag);
}
err = ff_cbs_write_packet(ctx->cbc, out, frag);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
goto fail;
}
err = av_packet_copy_props(out, in);
if (err < 0)
goto fail;
fail:
ff_cbs_fragment_uninit(ctx->cbc, frag);
av_packet_free(&in);
return err;
}
static int h264_redundant_pps_filter(AVBSFContext *bsf, AVPacket *out)
{
H264RedundantPPSContext *ctx = bsf->priv_data;
AVPacket *in;
CodedBitstreamFragment *au = &ctx->access_unit;
int au_has_sps;
int err, i;
err = ff_bsf_get_packet(bsf, &in);
if (err < 0)
return err;
err = ff_cbs_read_packet(ctx->input, au, in);
if (err < 0)
goto fail;
au_has_sps = 0;
for (i = 0; i < au->nb_units; i++) {
CodedBitstreamUnit *nal = &au->units[i];
if (nal->type == H264_NAL_SPS)
au_has_sps = 1;
if (nal->type == H264_NAL_PPS) {
err = h264_redundant_pps_fixup_pps(ctx, nal->content);
if (err < 0)
goto fail;
if (!au_has_sps) {
av_log(bsf, AV_LOG_VERBOSE, "Deleting redundant PPS "
"at %"PRId64".\n", in->pts);
err = ff_cbs_delete_unit(ctx->input, au, i);
if (err < 0)
goto fail;
}
}
if (nal->type == H264_NAL_SLICE ||
nal->type == H264_NAL_IDR_SLICE) {
H264RawSlice *slice = nal->content;
h264_redundant_pps_fixup_slice(ctx, &slice->header);
}
}
err = ff_cbs_write_packet(ctx->output, out, au);
if (err < 0)
goto fail;
err = av_packet_copy_props(out, in);
if (err < 0)
goto fail;
err = 0;
fail:
ff_cbs_fragment_uninit(ctx->output, au);
av_packet_free(&in);
if (err < 0)
av_packet_unref(out);
return err;
}
static int h265_metadata_filter(AVBSFContext *bsf, AVPacket *out)
{
H265MetadataContext *ctx = bsf->priv_data;
AVPacket *in = NULL;
CodedBitstreamFragment *au = &ctx->access_unit;
int err, i;
err = ff_bsf_get_packet(bsf, &in);
if (err < 0)
goto fail;
err = ff_cbs_read_packet(ctx->cbc, au, in);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
goto fail;
}
if (au->nb_units == 0) {
av_log(bsf, AV_LOG_ERROR, "No NAL units in packet.\n");
err = AVERROR_INVALIDDATA;
goto fail;
}
// 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);
} else {
if (ctx->aud == INSERT) {
H265RawAUD *aud = &ctx->aud_nal;
int pic_type = 0, temporal_id = 8, layer_id = 0;
for (i = 0; i < au->nb_units; i++) {
const H265RawNALUnitHeader *nal = au->units[i].content;
if (!nal)
continue;
if (nal->nuh_temporal_id_plus1 < temporal_id + 1)
temporal_id = nal->nuh_temporal_id_plus1 - 1;
if (au->units[i].type <= HEVC_NAL_RSV_VCL31) {
const H265RawSlice *slice = au->units[i].content;
layer_id = nal->nuh_layer_id;
if (slice->header.slice_type == HEVC_SLICE_B &&
pic_type < 2)
pic_type = 2;
if (slice->header.slice_type == HEVC_SLICE_P &&
pic_type < 1)
pic_type = 1;
}
}
aud->nal_unit_header = (H265RawNALUnitHeader) {
.nal_unit_type = HEVC_NAL_AUD,
.nuh_layer_id = layer_id,
.nuh_temporal_id_plus1 = temporal_id + 1,
};
aud->pic_type = pic_type;
err = ff_cbs_insert_unit_content(ctx->cbc, au,
0, HEVC_NAL_AUD, aud, NULL);
if (err) {
av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
goto fail;
}
}
}
for (i = 0; i < au->nb_units; i++) {
if (au->units[i].type == HEVC_NAL_VPS) {
err = h265_metadata_update_vps(bsf, au->units[i].content);
if (err < 0)
goto fail;
}
if (au->units[i].type == HEVC_NAL_SPS) {
err = h265_metadata_update_sps(bsf, au->units[i].content);
if (err < 0)
goto fail;
}
}
err = ff_cbs_write_packet(ctx->cbc, out, au);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
goto fail;
}
err = av_packet_copy_props(out, in);
if (err < 0)
goto fail;
err = 0;
fail:
ff_cbs_fragment_uninit(ctx->cbc, au);
av_packet_free(&in);
return err;
}
}
}
if (write) {
disp->display_orientation_repetition_period = 1;
err = ff_cbs_h264_add_sei_message(ctx->cbc, au, &payload);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to add display orientation "
"SEI message to access unit.\n");
goto fail;
}
}
}
err = ff_cbs_write_packet(ctx->cbc, out, au);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
goto fail;
}
err = av_packet_copy_props(out, in);
if (err < 0)
goto fail;
if (displaymatrix_side_data) {
err = av_packet_add_side_data(out, AV_PKT_DATA_DISPLAYMATRIX,
displaymatrix_side_data,
displaymatrix_side_data_size);
if (err) {
av_log(bsf, AV_LOG_ERROR, "Failed to attach extracted "
