static int bsf_list_filter(AVBSFContext *bsf, AVPacket *out)
{
BSFListContext *lst = bsf->priv_data;
int ret;
if (!lst->nb_bsfs)
return ff_bsf_get_packet_ref(bsf, out);
while (1) {
if (lst->idx > lst->flushed_idx) {
ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
if (ret == AVERROR(EAGAIN)) {
/* no more packets from idx-1, try with previous */
ret = 0;
lst->idx--;
continue;
} else if (ret == AVERROR_EOF) {
/* filter idx-1 is done, continue with idx...nb_bsfs */
lst->flushed_idx = lst->idx;
continue;
}else if (ret < 0) {
/* filtering error */
break;
}
} else {
ret = ff_bsf_get_packet_ref(bsf, out);
if (ret == AVERROR_EOF) {
lst->idx = lst->flushed_idx;
} else if (ret < 0)
break;
}
if (lst->idx < lst->nb_bsfs) {
AVPacket *pkt;
if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
/* ff_bsf_get_packet_ref returned EOF and idx is first
* filter of yet not flushed filter chain */
pkt = NULL;
} else {
pkt = out;
}
ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
if (ret < 0)
break;
lst->idx++;
} else {
/* The end of filter chain, break to return result */
break;
}
}
if (ret < 0)
av_packet_unref(out);
return ret;
}
static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
{
ExtractExtradataContext *s = ctx->priv_data;
uint8_t *extradata = NULL;
int extradata_size;
int ret = 0;
ret = ff_bsf_get_packet_ref(ctx, pkt);
if (ret < 0)
return ret;
ret = s->extract(ctx, pkt, &extradata, &extradata_size);
if (ret < 0)
goto fail;
if (extradata) {
ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
extradata, extradata_size);
if (ret < 0) {
av_freep(&extradata);
goto fail;
}
}
return 0;
fail:
av_packet_unref(pkt);
return ret;
}
static int dump_extradata(AVBSFContext *ctx, AVPacket *out)
{
DumpExtradataContext *s = ctx->priv_data;
AVPacket *in = &s->pkt;
int ret = 0;
ret = ff_bsf_get_packet_ref(ctx, in);
if (ret < 0)
return ret;
if (ctx->par_in->extradata &&
(s->freq == DUMP_FREQ_ALL ||
(s->freq == DUMP_FREQ_KEYFRAME && in->flags & AV_PKT_FLAG_KEY))) {
if (in->size >= INT_MAX - ctx->par_in->extradata_size) {
ret = AVERROR(ERANGE);
goto fail;
}
ret = av_new_packet(out, in->size + ctx->par_in->extradata_size);
if (ret < 0)
goto fail;
ret = av_packet_copy_props(out, in);
if (ret < 0) {
av_packet_unref(out);
goto fail;
}
memcpy(out->data, ctx->par_in->extradata, ctx->par_in->extradata_size);
memcpy(out->data + ctx->par_in->extradata_size, in->data, in->size);
} else {
av_packet_move_ref(out, in);
}
fail:
av_packet_unref(in);
return ret;
}
