On 10/24/2022 11:06 AM, Thomas Siedel wrote:
+static int combine_au(AVCodecParserContext *ctx, AVCodecContext *avctx,
+ const uint8_t **buf, int *buf_size)
+{
This is being called only when you first assembled AUs from what's
assumed to be raw input. When PARSER_FLAG_COMPLETE_FRAMES is set, it
should also parse the AU for bitstream information.
+ VVCParserContext *s = ctx->priv_data;
+ CodedBitstreamFragment *pu = &s->picture_unit;
+ int ret;
+
+ s->cbc->log_ctx = avctx;
+
+ if (avctx->extradata_size && !s->parsed_extradata) {
+ s->parsed_extradata = 1;
+
+ if ((ret = ff_cbs_read(s->cbc, pu, avctx->extradata,
avctx->extradata_size)) < 0)
ff_cbs_read_extradata_from_codec()
+ av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
+
+ ff_cbs_fragment_reset(pu);
+ }
+ av_packet_unref(&s->last_au);
+ ret = parse_nal_units(ctx, *buf, *buf_size, avctx);
+ if (ret == 0) {
+ if (s->last_au.size) {
+ *buf = s->last_au.data;
+ *buf_size = s->last_au.size;
+ } else {
+ //no output
+ ret = 1;
+ }
+ }
+ s->cbc->log_ctx = NULL;
+ return ret;
+}
+
+static int vvc_parser_parse(AVCodecParserContext *ctx, AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ int next;
+ VVCParserContext *s = ctx->priv_data;
+ ParseContext *pc = &s->pc;
+
+ if (avctx->extradata && !s->parsed_extradata) {
+ av_log(avctx, AV_LOG_INFO, "extra data is not supported yet.\n");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ if (ctx->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+ next = buf_size;
+ } else {
+ int ret, flush = !buf_size;
+ next = find_frame_end(ctx, buf, buf_size);
+ if (ff_combine_frame(pc, next, &buf, &buf_size) < 0)
+ goto no_out;
+ ret = combine_au(ctx, avctx, &buf, &buf_size);
+ if (ret > 0 && flush) {
+ buf_size = 0;
+ ret = combine_au(ctx, avctx, &buf, &buf_size);
+ }
+ if (ret != 0) {
+ buf_size = next;
+ goto no_out;
+ }
+ }
+ *poutbuf = buf;
+ *poutbuf_size = buf_size;
+ return next;
+no_out:
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
+ return buf_size;
+}
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