mpegtsmux: Add support for SMPTE 302M (audio/x-smpte-302m)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6530>

subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json

@@ -223194,7 +223194,7 @@
                 "long-name": "MPEG Transport Stream Muxer",
                 "pad-templates": {
                     "sink_%%d": {
-                        "caps": "video/mpeg:\n         parsed: true\n    mpegversion: { (int)1, (int)2, (int)4 }\n   systemstream: false\nvideo/x-dirac:\nimage/x-jpc:\n      alignment: frame\nvideo/x-h264:\n  stream-format: byte-stream\n      alignment: { (string)au, (string)nal }\nvideo/x-h265:\n  stream-format: byte-stream\n      alignment: { (string)au, (string)nal }\naudio/mpeg:\n         parsed: true\n    mpegversion: 1\naudio/mpeg:\n         framed: true\n    mpegversion: { (int)2, (int)4 }\n  stream-format: { (string)adts, (string)raw }\naudio/x-lpcm:\n          width: { (int)16, (int)20, (int)24 }\n           rate: { (int)48000, (int)96000 }\n       channels: [ 1, 8 ]\n  dynamic_range: [ 0, 255 ]\n       emphasis: { (boolean)false, (boolean)true }\n           mute: { (boolean)false, (boolean)true }\naudio/x-ac3:\n         framed: true\naudio/x-dts:\n         framed: true\naudio/x-opus:\n       channels: [ 1, 255 ]\nsubpicture/x-dvb:\napplication/x-teletext:\nmeta/x-klv:\n         parsed: true\nmeta/x-id3:\n         parsed: true\nmeta/x-st-2038:\n      alignment: line\nimage/x-jpc:\n      alignment: frame\n        profile: [ 0, 49151 ]\nimage/x-jxsc:\n      alignment: frame\n       sampling: { (string)YCbCr-4:2:2, (string)YCbCr-4:4:4 }\n",
+                        "caps": "video/mpeg:\n         parsed: true\n    mpegversion: { (int)1, (int)2, (int)4 }\n   systemstream: false\nvideo/x-dirac:\nimage/x-jpc:\n      alignment: frame\nvideo/x-h264:\n  stream-format: byte-stream\n      alignment: { (string)au, (string)nal }\nvideo/x-h265:\n  stream-format: byte-stream\n      alignment: { (string)au, (string)nal }\naudio/mpeg:\n         parsed: true\n    mpegversion: 1\naudio/mpeg:\n         framed: true\n    mpegversion: { (int)2, (int)4 }\n  stream-format: { (string)adts, (string)raw }\naudio/x-lpcm:\n          width: { (int)16, (int)20, (int)24 }\n           rate: { (int)48000, (int)96000 }\n       channels: [ 1, 8 ]\n  dynamic_range: [ 0, 255 ]\n       emphasis: { (boolean)false, (boolean)true }\n           mute: { (boolean)false, (boolean)true }\naudio/x-ac3:\n         framed: true\naudio/x-dts:\n         framed: true\naudio/x-opus:\n       channels: [ 1, 255 ]\naudio/x-smpte-302m:\nsubpicture/x-dvb:\napplication/x-teletext:\nmeta/x-klv:\n         parsed: true\nmeta/x-id3:\n         parsed: true\nmeta/x-st-2038:\n      alignment: line\nimage/x-jpc:\n      alignment: frame\n        profile: [ 0, 49151 ]\nimage/x-jxsc:\n      alignment: frame\n       sampling: { (string)YCbCr-4:2:2, (string)YCbCr-4:4:4 }\n",
                         "direction": "sink",
                         "presence": "request",
                         "type": "GstBaseTsMuxPad"

subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.c

@@ -830,6 +830,8 @@ gst_base_ts_mux_create_or_update_stream (GstBaseTsMux * mux,
     ts_pad->prepare_func = gst_base_ts_mux_prepare_jpegxs;
     ts_pad->prepare_data = jpegxs_descriptor;
     ts_pad->free_func = gst_base_ts_mux_free_jpegxs;
+  } else if (strcmp (mt, "audio/x-smpte-302m") == 0) {
+    st = TSMUX_ST_PS_S302M;
   } else if (strcmp (mt, "image/x-jpc") == 0) {
     /*
      * See this document for more details on standard:

subprojects/gst-plugins-bad/gst/mpegtsmux/gstmpegtsmux.c

@@ -124,6 +124,7 @@ static GstStaticPadTemplate gst_mpeg_ts_mux_sink_factory =
         "audio/x-dts, framed = (boolean) TRUE;"
         "audio/x-opus, "
         "channels = (int) [1, 255];"
+        "audio/x-smpte-302m;"
         "subpicture/x-dvb; application/x-teletext; meta/x-klv, parsed=true;"
         "meta/x-id3, parsed=true;"
         "meta/x-st-2038, alignment = (string) line;"

subprojects/gst-plugins-bad/gst/mpegtsmux/tsmux/tsmuxstream.c

@@ -245,6 +245,13 @@ tsmux_stream_new (guint16 pid, guint stream_type, guint stream_number)
       stream->stream_type = TSMUX_ST_PRIVATE_DATA;
       stream->pi.flags |= TSMUX_PACKET_FLAG_PES_FULL_HEADER;
       break;
+    case TSMUX_ST_PS_S302M:
+      /* FIXME: assign sequential extended IDs? */
+      stream->id = 0xBD;
+      stream->gst_stream_type = GST_STREAM_TYPE_AUDIO;
+      stream->stream_type = TSMUX_ST_PRIVATE_DATA;
+      stream->pi.flags |= TSMUX_PACKET_FLAG_PES_FULL_HEADER;
+      break;
     default:
       /* Might be a custom stream type implemented by a subclass */
       break;
@@ -1022,6 +1029,11 @@ tsmux_stream_default_get_es_descrs (TsMuxStream * stream,
         descriptor = gst_mpegts_descriptor_from_custom (0xc4, NULL, 0);
         g_ptr_array_add (pmt_stream->descriptors, descriptor);
       }
+      if (stream->internal_stream_type == TSMUX_ST_PS_S302M) {
+        descriptor = gst_mpegts_descriptor_from_registration ("BSSD", NULL, 0);
+        GST_DEBUG ("adding SMPTE 302M registration descriptor");
+        g_ptr_array_add (pmt_stream->descriptors, descriptor);
+      }
     default:
       break;
   }

subprojects/gst-plugins-bad/gst/mpegtsmux/tsmux/tsmuxstream.h

@@ -134,6 +134,7 @@ enum TsMuxStreamType {
   TSMUX_ST_PS_OPUS                    = 0x8f,    /* only used internally */
   TSMUX_ST_PS_ID3                     = 0x90,    /* only used internally */
   TSMUX_ST_PS_ST_2038                 = 0x91,    /* only used internally */
+  TSMUX_ST_PS_S302M                   = 0x92,    /* only used internally */
   TSMUX_ST_PS_DVD_SUBPICTURE          = 0xff,
 
   /* Non-standard definitions */