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Work around AJA SDK not recogizing CEA708 packets when capturing TALL frames in SD modes

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Stop using CountAncillaryDataWithType(AJAAncillaryDataType_Cea708) etc
because for SD it doesn't recognize the packets. It assumes they would
only be received on AJAAncillaryDataChannel_Y but for SD it is actually
AJAAncillaryDataChannel_Both.
This commit is contained in:
Sebastian Dröge 2021-03-05 14:35:34 +02:00
parent e70dcfa588
commit 6deeb2389e
1 changed files with 15 additions and 7 deletions
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22
gstajasrc.cpp
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@ -1105,15 +1105,23 @@ static GstFlowReturn gst_aja_src_create(GstPushSrc *psrc, GstBuffer **buffer) {
gst_clear_buffer(&item.anc_buffer);
gst_clear_buffer(&item.anc_buffer2);
if (anc_packets.CountAncillaryDataWithType(AJAAncillaryDataType_Cea708)) {
AJAAncillaryData packet =
anc_packets.GetAncillaryDataWithType(AJAAncillaryDataType_Cea708);
// Not using CountAncillaryDataWithType(AJAAncillaryDataType_Cea708) etc
// here because for SD it doesn't recognize the packets. It assumes they
// would only be received on AJAAncillaryDataChannel_Y but for SD it is
// actually AJAAncillaryDataChannel_Both.
//
// See AJA SDK support ticket #4844.
guint32 n_vanc_packets = anc_packets.CountAncillaryData();
for (guint32 i = 0; i < n_vanc_packets; i++) {
AJAAncillaryData *packet = anc_packets.GetAncillaryDataAtIndex(i);
if (packet.GetPayloadData() && packet.GetPayloadByteCount() &&
AJA_SUCCESS(packet.ParsePayloadData())) {
if (packet->GetDID() == AJAAncillaryData_CEA708_DID &&
packet->GetSID() == AJAAncillaryData_CEA708_SID &&
packet->GetPayloadData() && packet->GetPayloadByteCount() &&
AJA_SUCCESS(packet->ParsePayloadData())) {
gst_buffer_add_video_caption_meta(
*buffer, GST_VIDEO_CAPTION_TYPE_CEA708_CDP, packet.GetPayloadData(),
packet.GetPayloadByteCount());
*buffer, GST_VIDEO_CAPTION_TYPE_CEA708_CDP, packet->GetPayloadData(),
packet->GetPayloadByteCount());
}
}