On 4/23/2025 5:45 PM, Mark Thompson wrote:
+static int cbs_apv_split_fragment(CodedBitstreamContext *ctx,
+ CodedBitstreamFragment *frag,
+ int header)
+{
+ uint8_t *data = frag->data;
+ size_t size = frag->data_size;
+ uint32_t signature;
+ int err, trace;
To prepare CBS for the presence of extradata, make this function a no-op when header != 0.
+
+ // Don't include parsing here in trace output.
+ trace = ctx->trace_enable;
+ ctx->trace_enable = 0;
+
+ signature = AV_RB32(data);
+ if (signature != APV_SIGNATURE) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR,
+ "Invalid APV access unit: bad signature %08x.\n",
+ signature);
+ err = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+ data += 4;
+ size -= 4;
+
+ while (size > 0) {
+ GetBitContext gbc;
+ uint32_t pbu_size;
+ APVRawPBUHeader pbu_header;
+
+ if (size < 8) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid PBU: "
+ "fragment too short (%"SIZE_SPECIFIER" bytes).\n",
+ size);
+ err = AVERROR_INVALIDDATA;
+ goto fail;
+ }
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