diff options
Diffstat (limited to 'gst/videoparsers/gsth264parse.c')
| -rw-r--r-- | gst/videoparsers/gsth264parse.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/gst/videoparsers/gsth264parse.c b/gst/videoparsers/gsth264parse.c index c2729102f..c2b3d81e4 100644 --- a/gst/videoparsers/gsth264parse.c +++ b/gst/videoparsers/gsth264parse.c @@ -520,6 +520,95 @@ _nal_name (GstH264NalUnitType nal_type) #endif static void +gst_h264_parse_process_sei_user_data (GstH264Parse * h264parse, + GstH264RegisteredUserData * rud) +{ + guint16 provider_code; + guint32 atsc_user_id; + GstByteReader br; + + if (rud->country_code != 0xB5) + return; + + if (rud->data == NULL || rud->size < 2) + return; + + gst_byte_reader_init (&br, rud->data, rud->size); + + provider_code = gst_byte_reader_get_uint16_be_unchecked (&br); + + /* There is also 0x29 / 47 for DirecTV, but we don't handle that for now. + * https://en.wikipedia.org/wiki/CEA-708#Picture_User_Data */ + if (provider_code != 0x0031) + return; + + /* ANSI/SCTE 128-2010a section 8.1.2 */ + if (!gst_byte_reader_get_uint32_be (&br, &atsc_user_id)) + return; + + atsc_user_id = GUINT32_FROM_BE (atsc_user_id); + switch (atsc_user_id) { + case GST_MAKE_FOURCC ('G', 'A', '9', '4'):{ + guint8 user_data_type_code, m; + + /* 8.2.1 ATSC1_data() Semantics, Table 15 */ + if (!gst_byte_reader_get_uint8 (&br, &user_data_type_code)) + return; + + switch (user_data_type_code) { + case 0x03:{ + guint8 process_cc_data_flag; + guint8 cc_count, em_data, b; + guint i; + + if (!gst_byte_reader_get_uint8 (&br, &b) || (b & 0x20) != 0) + break; + + if (!gst_byte_reader_get_uint8 (&br, &em_data) || em_data != 0xff) + break; + + process_cc_data_flag = (b & 0x40) != 0; + cc_count = b & 0x1f; + + if (cc_count * 3 > gst_byte_reader_get_remaining (&br)) + break; + + if (!process_cc_data_flag || cc_count == 0) { + gst_byte_reader_skip_unchecked (&br, cc_count * 3); + break; + } + + /* Shouldn't really happen so let's not go out of our way to handle it */ + if (h264parse->closedcaptions_size > 0) { + GST_WARNING_OBJECT (h264parse, "unused pending closed captions!"); + GST_MEMDUMP_OBJECT (h264parse, "unused captions being dropped", + h264parse->closedcaptions, h264parse->closedcaptions_size); + } + + for (i = 0; i < cc_count * 3; i++) { + h264parse->closedcaptions[i] = + gst_byte_reader_get_uint8_unchecked (&br); + } + h264parse->closedcaptions_size = cc_count * 3; + h264parse->closedcaptions_type = GST_VIDEO_CAPTION_TYPE_CEA708_RAW; + + GST_LOG_OBJECT (h264parse, "Extracted closed captions"); + break; + } + default: + GST_LOG ("Unhandled atsc1 user data type %d", atsc_user_id); + break; + } + if (!gst_byte_reader_get_uint8 (&br, &m) || m != 0xff) + GST_WARNING_OBJECT (h264parse, "Marker bits mismatch after ATSC1_data"); + break; + } + default: + break; + } +} + +static void gst_h264_parse_process_sei (GstH264Parse * h264parse, GstH264NalUnit * nalu) { GstH264SEIMessage sei; @@ -563,6 +652,10 @@ gst_h264_parse_process_sei (GstH264Parse * h264parse, GstH264NalUnit * nalu) GST_LOG_OBJECT (h264parse, "pic timing updated"); break; } + case GST_H264_SEI_REGISTERED_USER_DATA: + gst_h264_parse_process_sei_user_data (h264parse, + &sei.payload.registered_user_data); + break; case GST_H264_SEI_BUF_PERIOD: if (h264parse->ts_trn_nb == GST_CLOCK_TIME_NONE || h264parse->dts == GST_CLOCK_TIME_NONE) @@ -2486,6 +2579,15 @@ gst_h264_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame) buffer = frame->buffer; } + if (h264parse->closedcaptions_size > 0) { + gst_buffer_add_video_caption_meta (buffer, + h264parse->closedcaptions_type, h264parse->closedcaptions, + h264parse->closedcaptions_size); + + h264parse->closedcaptions_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN; + h264parse->closedcaptions_size = 0; + } + if ((event = check_pending_key_unit_event (h264parse->force_key_unit_event, &parse->segment, GST_BUFFER_TIMESTAMP (buffer), GST_BUFFER_FLAGS (buffer), h264parse->pending_key_unit_ts))) { |