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Add support for AFD/Bar VANC in the source element and widescreen NTSC/PAL

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This commit is contained in:
Sebastian Dröge 2021-07-07 12:28:38 +03:00
parent 99c86891a4
commit fe13e5f211
2 changed files with 84 additions and 3 deletions
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19
gstajacommon.cpp
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@ -174,7 +174,24 @@ GstCaps *gst_ntv2_supported_caps(NTV2DeviceID device_id) {
::NTV2DeviceCanDoVideoFormat(device_id, format.aja_format)) ||
(format.quad_format != NTV2_FORMAT_UNKNOWN &&
::NTV2DeviceCanDoVideoFormat(device_id, format.quad_format))) {
gst_caps_append(caps, gst_aja_video_format_to_caps(format.gst_format));
GstCaps *tmp = gst_aja_video_format_to_caps(format.gst_format);
// Widescreen PAL/NTSC
if (format.gst_format == GST_AJA_VIDEO_FORMAT_525_2398 ||
format.gst_format == GST_AJA_VIDEO_FORMAT_525_2400 ||
format.gst_format == GST_AJA_VIDEO_FORMAT_525_5994) {
GstCaps *tmp2 = gst_caps_copy(tmp);
gst_caps_set_simple(tmp2, "pixel-aspect-ratio", GST_TYPE_FRACTION, 40,
33, NULL);
gst_caps_append(tmp, tmp2);
} else if (format.gst_format == GST_AJA_VIDEO_FORMAT_625_5000) {
GstCaps *tmp2 = gst_caps_copy(tmp);
gst_caps_set_simple(tmp2, "pixel-aspect-ratio", GST_TYPE_FRACTION, 16,
11, NULL);
gst_caps_append(tmp, tmp2);
}
gst_caps_append(caps, tmp);
}
}
}

68
gstajasrc.cpp
View file

@ -1406,6 +1406,8 @@ static GstFlowReturn gst_aja_src_create(GstPushSrc *psrc, GstBuffer **buffer) {
//
// See AJA SDK support ticket #4844.
guint32 n_vanc_packets = anc_packets.CountAncillaryData();
bool aspect_ratio_flag = false;
bool have_afd_bar = false;
for (guint32 i = 0; i < n_vanc_packets; i++) {
AJAAncillaryData *packet = anc_packets.GetAncillaryDataAtIndex(i);
@ -1413,14 +1415,46 @@ static GstFlowReturn gst_aja_src_create(GstPushSrc *psrc, GstBuffer **buffer) {
packet->GetSID() == AJAAncillaryData_CEA708_SID &&
packet->GetPayloadData() && packet->GetPayloadByteCount() &&
AJA_SUCCESS(packet->ParsePayloadData())) {
GST_TRACE_OBJECT(
self, "Found CEA708 CDP VANC of %" G_GSIZE_FORMAT " bytes at line %u",
packet->GetPayloadByteCount(), packet->GetLocationLineNumber());
gst_buffer_add_video_caption_meta(
*buffer, GST_VIDEO_CAPTION_TYPE_CEA708_CDP, packet->GetPayloadData(),
packet->GetPayloadByteCount());
} else if (packet->GetDID() == 0x41 && packet->GetSID() == 0x05 &&
packet->GetPayloadData() && packet->GetPayloadByteCount() == 8) {
const guint8 *data = packet->GetPayloadData();
have_afd_bar = true;
aspect_ratio_flag = (data[0] >> 2) & 0x1;
GstVideoAFDValue afd = (GstVideoAFDValue)((data[0] >> 3) & 0xf);
gboolean is_letterbox = ((data[3] >> 4) & 0x3) == 0;
guint16 bar1 = GST_READ_UINT16_BE(&data[4]);
guint16 bar2 = GST_READ_UINT16_BE(&data[6]);
GST_TRACE_OBJECT(self,
"Found AFD/Bar VANC at line %u: AR %u, AFD %u, "
"letterbox %u, bar1 %u, bar2 %u",
packet->GetLocationLineNumber(), aspect_ratio_flag, afd,
is_letterbox, bar1, bar2);
const NTV2Standard standard(
::GetNTV2StandardFromVideoFormat(item.detected_format));
const NTV2SmpteLineNumber smpte_line_num_info =
::GetSmpteLineNumber(standard);
bool field2 =
packet->GetLocationLineNumber() >
smpte_line_num_info.GetLastLine(
smpte_line_num_info.firstFieldTop ? NTV2_FIELD0 : NTV2_FIELD1);
gst_buffer_add_video_afd_meta(*buffer, field2 ? 1 : 0,
GST_VIDEO_AFD_SPEC_SMPTE_ST2016_1, afd);
gst_buffer_add_video_bar_meta(*buffer, field2 ? 1 : 0, is_letterbox, bar1,
bar2);
}
}
// TODO: Add AFD/Bar meta
bool caps_changed = false;
CNTV2VPID vpid(item.vpid);
@ -1464,6 +1498,17 @@ static GstFlowReturn gst_aja_src_create(GstPushSrc *psrc, GstBuffer **buffer) {
break;
}
if (!have_afd_bar && vpid.GetImageAspect16x9()) aspect_ratio_flag = true;
// Widescreen PAL/NTSC
if (aspect_ratio_flag && info.height == 486) {
info.par_n = 40;
info.par_d = 33;
} else if (aspect_ratio_flag && info.height == 576) {
info.par_n = 16;
info.par_d = 11;
}
if (!gst_pad_has_current_caps(GST_BASE_SRC_PAD(self)) ||
!gst_video_info_is_equal(&info, &self->current_info)) {
self->current_info = info;
@ -1474,6 +1519,15 @@ static GstFlowReturn gst_aja_src_create(GstPushSrc *psrc, GstBuffer **buffer) {
GstVideoInfo info;
if (gst_video_info_from_ntv2_video_format(&info, item.detected_format)) {
// Widescreen PAL/NTSC
if (aspect_ratio_flag && info.height == 486) {
info.par_n = 40;
info.par_d = 33;
} else if (aspect_ratio_flag && info.height == 576) {
info.par_n = 16;
info.par_d = 11;
}
if (!gst_pad_has_current_caps(GST_BASE_SRC_PAD(self)) ||
!gst_video_info_is_equal(&info, &self->current_info)) {
self->current_info = info;
@ -1481,6 +1535,16 @@ static GstFlowReturn gst_aja_src_create(GstPushSrc *psrc, GstBuffer **buffer) {
}
} else if (!gst_pad_has_current_caps(GST_BASE_SRC_PAD(self))) {
self->current_info = self->configured_info;
// Widescreen PAL/NTSC
if (aspect_ratio_flag && self->current_info.height == 486) {
self->current_info.par_n = 40;
self->current_info.par_d = 33;
} else if (aspect_ratio_flag && self->current_info.height == 576) {
self->current_info.par_n = 16;
self->current_info.par_d = 11;
}
caps_changed = true;
}
}