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mpegvideoparse: use gstvideoparseutils to handle user data
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parent
22ec7fbbc2
commit
d5946fc804
2 changed files with 24 additions and 101 deletions
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@ -461,93 +461,20 @@ parse_packet_extension (GstMpegvParse * mpvparse, GstMapInfo * info, guint off)
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}
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}
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/* A53-4 Table 6.7 */
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#define A53_USER_DATA_ID_GA94 0x47413934
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#define A53_USER_DATA_ID_DTG1 0x44544731
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/* A53-4 Table 6.9 */
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#define A53_USER_DATA_TYPE_CODE_MPEG_CC_DATA 0x03
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#define A53_USER_DATA_TYPE_CODE_BAR_DATA 0x06
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/* CEA-708 Table 2 */
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#define CEA_708_PROCESS_CC_DATA_FLAG 0x40
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#define CEA_708_PROCESS_EM_DATA_FLAG 0x80
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static void
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parse_user_data_packet (GstMpegvParse * mpvparse, const guint8 * data,
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guint size)
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{
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gboolean a53_user_data_ga94 = FALSE;
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gboolean a53_user_data_dtg1 = FALSE;
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gboolean a53_user_data_mpeg_cc = FALSE;
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gboolean a53_process_708_cc_data = FALSE;
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gboolean process_708_em_data = FALSE;
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GstByteReader br;
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GstVideoParseUtilsField field = GST_VIDEO_PARSE_UTILS_FIELD_1;
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gst_byte_reader_init (&br, data, size);
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if (size < 2) {
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GST_DEBUG_OBJECT (mpvparse, "user data packet too short, ignoring");
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return;
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}
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if (mpvparse->picext.picture_structure ==
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(guint8) GST_MPEG_VIDEO_PICTURE_STRUCTURE_BOTTOM_FIELD)
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field = GST_VIDEO_PARSE_UTILS_FIELD_2;
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gst_video_parse_user_data ((GstElement *) mpvparse, &mpvparse->user_data, &br,
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field, ITU_T_T35_MANUFACTURER_US_ATSC);
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/* A53 part 4 closed captions */
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if (size > 6) {
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guint32 user_data_id = GST_READ_UINT32_BE (data);
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a53_user_data_ga94 = user_data_id == A53_USER_DATA_ID_GA94;
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a53_user_data_dtg1 = user_data_id == A53_USER_DATA_ID_DTG1;
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a53_user_data_mpeg_cc = data[4] == A53_USER_DATA_TYPE_CODE_MPEG_CC_DATA;
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a53_process_708_cc_data = (data[5] & CEA_708_PROCESS_CC_DATA_FLAG) != 0;
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process_708_em_data = (data[5] & CEA_708_PROCESS_EM_DATA_FLAG) != 0;
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if (a53_user_data_dtg1) {
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GST_DEBUG_OBJECT (mpvparse,
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"ignoring closed captions as DTG1 is not supported");
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} else if (a53_user_data_ga94) {
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GST_DEBUG_OBJECT (mpvparse, "GA94 closed captions");
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if (!a53_user_data_mpeg_cc) {
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GST_DEBUG_OBJECT (mpvparse,
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"ignoring closed captions as A53_USER_DATA_TYPE_CODE_MPEG_CC_DATA is not set");
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}
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if (!a53_process_708_cc_data) {
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GST_DEBUG_OBJECT (mpvparse,
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"ignoring closed captions as CEA_708_PROCESS_CC_DATA_FLAG is not set");
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}
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if (!process_708_em_data) {
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GST_DEBUG_OBJECT (mpvparse,
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"CEA_708_PROCESS_EM_DATA_FLAG flag is not set");
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}
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/* ignore em data flag for now as it breaks one of the tests */
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process_708_em_data = /*process_708_em_data && */ (data[6] == 0xff);
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if (!process_708_em_data) {
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GST_DEBUG_OBJECT (mpvparse,
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"ignoring closed captions as em data does not equal 0xFF");
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}
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}
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}
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if (size > 6 && a53_user_data_ga94 && a53_user_data_mpeg_cc
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&& a53_process_708_cc_data && process_708_em_data) {
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guint8 cc_count = data[5] & 0x1f;
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guint cc_size = cc_count * 3;
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data += 7;
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size -= 7;
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if (cc_size == 0 || cc_size > size) {
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GST_DEBUG_OBJECT (mpvparse, "ignoring closed captions, not enough data");
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return;
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}
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/* Shouldn't really happen so let's not go out of our way to handle it */
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if (mpvparse->closedcaptions_size > 0)
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GST_WARNING_OBJECT (mpvparse, "unused pending closed captions!");
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g_assert (cc_size <= sizeof (mpvparse->closedcaptions));
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memcpy (mpvparse->closedcaptions, data, cc_size);
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mpvparse->closedcaptions_size = cc_size;
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mpvparse->closedcaptions_type = GST_VIDEO_CAPTION_TYPE_CEA708_RAW;
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GST_DEBUG_OBJECT (mpvparse, "CEA-708 closed captions, %u bytes", cc_size);
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return;
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}
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GST_MEMDUMP_OBJECT (mpvparse, "unhandled user data packet", data, size);
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}
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/* caller guarantees at least start code in @buf at @off ( - 4)*/
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@ -1040,6 +967,7 @@ gst_mpegv_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
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GstMpegVideoPictureHdr *pic_hdr = NULL;
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GstMpegVideoPictureExt *pic_ext = NULL;
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GstMpegVideoQuantMatrixExt *quant_ext = NULL;
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GstBuffer *parse_buffer = NULL;
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/* tag sending done late enough in hook to ensure pending events
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* have already been sent */
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@ -1105,22 +1033,20 @@ gst_mpegv_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
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meta->slice_offset = mpvparse->slice_offset;
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}
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if (mpvparse->closedcaptions_size > 0) {
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GstBuffer *buf;
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if (frame->out_buffer) {
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buf = frame->out_buffer = gst_buffer_make_writable (frame->out_buffer);
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parse_buffer = frame->out_buffer =
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gst_buffer_make_writable (frame->out_buffer);
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} else {
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buf = frame->buffer = gst_buffer_make_writable (frame->buffer);
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parse_buffer = frame->buffer = gst_buffer_make_writable (frame->buffer);
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}
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gst_buffer_add_video_caption_meta (buf,
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mpvparse->closedcaptions_type, mpvparse->closedcaptions,
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mpvparse->closedcaptions_size);
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mpvparse->closedcaptions_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
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mpvparse->closedcaptions_size = 0;
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if (pic_ext && !pic_ext->progressive_frame) {
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GST_BUFFER_FLAG_SET (parse_buffer, GST_VIDEO_BUFFER_FLAG_INTERLACED);
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if (pic_ext->top_field_first)
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GST_BUFFER_FLAG_SET (parse_buffer, GST_VIDEO_BUFFER_FLAG_TFF);
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}
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gst_video_push_user_data ((GstElement *) mpvparse, &mpvparse->user_data,
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parse_buffer);
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return GST_FLOW_OK;
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}
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@ -27,7 +27,7 @@
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#include <gst/gst.h>
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#include <gst/base/gstbaseparse.h>
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#include "gstvideoparseutils.h"
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#include <gst/codecparsers/gstmpegvideoparser.h>
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G_BEGIN_DECLS
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@ -87,10 +87,7 @@ struct _GstMpegvParse {
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gboolean picext_updated;
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gboolean quantmatrext_updated;
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/* pending closed captions */
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guint8 closedcaptions[96];
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guint closedcaptions_size;
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GstVideoCaptionType closedcaptions_type;
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GstVideoParseUserData user_data;
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/* properties */
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gboolean drop;
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