avcodec/h264_metadata: filter parameter sets in packet side data

Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/h264_metadata_bsf.c

@@ -275,6 +275,49 @@ static int h264_metadata_update_sps(AVBSFContext *bsf,
     return 0;
 }
 
+static int h264_metadata_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
+{
+    H264MetadataContext *ctx = bsf->priv_data;
+    CodedBitstreamFragment *au = &ctx->access_unit;
+    uint8_t *side_data;
+    int side_data_size;
+    int err, i;
+
+    side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
+                                        &side_data_size);
+    if (!side_data_size)
+        return 0;
+
+    err = ff_cbs_read(ctx->cbc, au, side_data, side_data_size);
+    if (err < 0) {
+        av_log(bsf, AV_LOG_ERROR, "Failed to read extradata from packet side data.\n");
+        return err;
+    }
+
+    for (i = 0; i < au->nb_units; i++) {
+        if (au->units[i].type == H264_NAL_SPS) {
+            err = h264_metadata_update_sps(bsf, au->units[i].content);
+            if (err < 0)
+                return err;
+        }
+    }
+
+    err = ff_cbs_write_fragment_data(ctx->cbc, au);
+    if (err < 0) {
+        av_log(bsf, AV_LOG_ERROR, "Failed to write extradata into packet side data.\n");
+        return err;
+    }
+
+    side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, au->data_size);
+    if (!side_data)
+        return AVERROR(ENOMEM);
+    memcpy(side_data, au->data, au->data_size);
+
+    ff_cbs_fragment_reset(ctx->cbc, au);
+
+    return 0;
+}
+
 static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
 {
     H264MetadataContext *ctx = bsf->priv_data;
@@ -286,6 +329,10 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
     if (err < 0)
         return err;
 
+    err = h264_metadata_update_side_data(bsf, pkt);
+    if (err < 0)
+        goto fail;
+
     err = ff_cbs_read_packet(ctx->cbc, au, pkt);
     if (err < 0) {
         av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");