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Add support for writing CEA608 S334-1 Annex A Closed Captions

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And allow configuring the line number to use for CEA708/608 captions.
This commit is contained in:
Sebastian Dröge 2022-03-29 10:24:45 +03:00
parent e53a017ee7
commit 2bddfeac8a
2 changed files with 82 additions and 10 deletions
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89
gstajasink.cpp
View file

@ -21,6 +21,7 @@
#include "config.h"
#endif
#include <ajaanc/includes/ancillarydata_cea608_vanc.h>
#include <ajaanc/includes/ancillarydata_cea708.h>
#include <ajaanc/includes/ancillarylist.h>
#include <ajantv2/includes/ntv2rp188.h>
@ -38,6 +39,8 @@ GST_DEBUG_CATEGORY_STATIC(gst_aja_sink_debug);
#define DEFAULT_SDI_MODE (GST_AJA_SDI_MODE_SINGLE_LINK)
#define DEFAULT_TIMECODE_INDEX (GST_AJA_TIMECODE_INDEX_VITC)
#define DEFAULT_REFERENCE_SOURCE (GST_AJA_REFERENCE_SOURCE_AUTO)
#define DEFAULT_CEA608_LINE_NUMBER (12)
#define DEFAULT_CEA708_LINE_NUMBER (12)
#define DEFAULT_QUEUE_SIZE (16)
#define DEFAULT_START_FRAME (0)
#define DEFAULT_END_FRAME (0)
@ -52,6 +55,8 @@ enum {
PROP_SDI_MODE,
PROP_TIMECODE_INDEX,
PROP_REFERENCE_SOURCE,
PROP_CEA608_LINE_NUMBER,
PROP_CEA708_LINE_NUMBER,
PROP_QUEUE_SIZE,
PROP_START_FRAME,
PROP_END_FRAME,
@ -198,6 +203,27 @@ static void gst_aja_sink_class_init(GstAjaSinkClass *klass) {
(GParamFlags)(G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property(
gobject_class, PROP_CEA608_LINE_NUMBER,
g_param_spec_uint(
"cea608-line-number", "CEA608 Line Number",
"Sets the line number to use for CEA608 S334-1 Annex A Closed "
"Captions "
"(-1=disabled)",
0, G_MAXUINT, DEFAULT_CEA608_LINE_NUMBER,
(GParamFlags)(G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property(
gobject_class, PROP_CEA708_LINE_NUMBER,
g_param_spec_uint(
"cea708-line-number", "CEA708 Line Number",
"Sets the line number to use for CEA708 S334-2 Closed Captions "
"(-1=disabled)",
0, G_MAXUINT, DEFAULT_CEA608_LINE_NUMBER,
(GParamFlags)(G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
G_PARAM_CONSTRUCT)));
g_object_class_install_property(
gobject_class, PROP_OUTPUT_CPU_CORE,
g_param_spec_uint(
@ -288,6 +314,12 @@ void gst_aja_sink_set_property(GObject *object, guint property_id,
case PROP_REFERENCE_SOURCE:
self->reference_source = (GstAjaReferenceSource)g_value_get_enum(value);
break;
case PROP_CEA608_LINE_NUMBER:
self->cea608_line_number = g_value_get_uint(value);
break;
case PROP_CEA708_LINE_NUMBER:
self->cea708_line_number = g_value_get_uint(value);
break;
case PROP_OUTPUT_CPU_CORE:
self->output_cpu_core = g_value_get_uint(value);
break;
@ -332,6 +364,12 @@ void gst_aja_sink_get_property(GObject *object, guint property_id,
case PROP_REFERENCE_SOURCE:
g_value_set_enum(value, self->reference_source);
break;
case PROP_CEA608_LINE_NUMBER:
g_value_set_uint(value, self->cea608_line_number);
break;
case PROP_CEA708_LINE_NUMBER:
g_value_set_uint(value, self->cea708_line_number);
break;
case PROP_OUTPUT_CPU_CORE:
g_value_set_uint(value, self->output_cpu_core);
break;
@ -1578,19 +1616,50 @@ static GstFlowReturn gst_aja_sink_render(GstBaseSink *bsink,
(caption_meta = (GstVideoCaptionMeta *)gst_buffer_iterate_meta_filtered(
buffer, &iter, GST_VIDEO_CAPTION_META_API_TYPE))) {
if (caption_meta->caption_type == GST_VIDEO_CAPTION_TYPE_CEA708_CDP) {
const AJAAncillaryDataLocation kCEA708LocF1(
AJAAncillaryDataLink_A, AJAAncillaryDataVideoStream_Y,
AJAAncillaryDataSpace_VANC, 12, AJAAncDataHorizOffset_AnyVanc);
if (self->cea708_line_number != -1) {
const AJAAncillaryDataLocation kCEA708LocF1(
AJAAncillaryDataLink_A, AJAAncillaryDataVideoStream_Y,
AJAAncillaryDataSpace_VANC, self->cea708_line_number,
AJAAncDataHorizOffset_AnyVanc);
AJAAncillaryData_Cea708 pkt;
AJAAncillaryData_Cea708 pkt;
pkt.SetDID(GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 >> 8);
pkt.SetSID(GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 & 0xff);
pkt.SetDataLocation(kCEA708LocF1);
pkt.SetDataCoding(AJAAncillaryDataCoding_Digital);
pkt.SetPayloadData(caption_meta->data, caption_meta->size);
pkt.SetDID(AJAAncillaryData_CEA708_DID);
pkt.SetSID(AJAAncillaryData_CEA708_SID);
pkt.SetDataLocation(kCEA708LocF1);
pkt.SetDataCoding(AJAAncillaryDataCoding_Digital);
pkt.SetPayloadData(caption_meta->data, caption_meta->size);
anc_packet_list.AddAncillaryData(pkt);
GST_TRACE_OBJECT(
self,
"Adding CEA708 CDP VANC of %" G_GSIZE_FORMAT " bytes at line %u",
pkt.GetPayloadByteCount(), pkt.GetLocationLineNumber());
anc_packet_list.AddAncillaryData(pkt);
}
} else if (caption_meta->caption_type ==
GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A) {
if (self->cea608_line_number != -1) {
const AJAAncillaryDataLocation kCEA608LocF1(
AJAAncillaryDataLink_A, AJAAncillaryDataVideoStream_Y,
AJAAncillaryDataSpace_VANC, self->cea608_line_number,
AJAAncDataHorizOffset_AnyVanc);
AJAAncillaryData_Cea608_Vanc pkt;
pkt.SetDID(AJAAncillaryData_Cea608_Vanc_DID);
pkt.SetSID(AJAAncillaryData_Cea608_Vanc_SID);
pkt.SetDataLocation(kCEA608LocF1);
pkt.SetDataCoding(AJAAncillaryDataCoding_Digital);
pkt.SetPayloadData(caption_meta->data, caption_meta->size);
pkt.ParsePayloadData();
GST_TRACE_OBJECT(
self, "Adding CEA608 VANC of %" G_GSIZE_FORMAT " bytes at line %u",
pkt.GetPayloadByteCount(), pkt.GetLocationLineNumber());
anc_packet_list.AddAncillaryData(pkt);
}
} else {
GST_WARNING_OBJECT(self, "Unhandled caption type %d",
caption_meta->caption_type);

3
gstajasink.h
View file

@ -78,6 +78,9 @@ struct _GstAjaSink {
GstAjaTimecodeIndex timecode_index;
GstAjaReferenceSource reference_source;
gint cea608_line_number;
gint cea708_line_number;
NTV2AudioSystem audio_system;
NTV2VideoFormat video_format;
bool quad_mode;