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h265parse: forward time codes

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This transforms time code SEIs into GstVideoTimeCodeMeta
This commit is contained in:
Mathieu Duponchelle 2019-03-30 01:17:08 +01:00 committed by Mathieu Duponchelle
parent 7c425cf339
commit 55bb8966e1
4 changed files with 186 additions and 4 deletions
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62
gst-libs/gst/codecparsers/gsth265parser.c
View file

@ -1124,6 +1124,64 @@ error:
return GST_H265_PARSER_ERROR;
}
static GstH265ParserResult
gst_h265_parser_parse_time_code (GstH265Parser * parser,
GstH265TimeCode * tc, NalReader * nr)
{
guint i;
GST_DEBUG ("parsing \"Time code\"");
READ_UINT8 (nr, tc->num_clock_ts, 2);
for (i = 0; i < tc->num_clock_ts; i++) {
READ_UINT8 (nr, tc->clock_timestamp_flag[i], 1);
if (tc->clock_timestamp_flag[i]) {
READ_UINT8 (nr, tc->units_field_based_flag[i], 1);
READ_UINT8 (nr, tc->counting_type[i], 5);
READ_UINT8 (nr, tc->full_timestamp_flag[i], 1);
READ_UINT8 (nr, tc->discontinuity_flag[i], 1);
READ_UINT8 (nr, tc->cnt_dropped_flag[i], 1);
READ_UINT16 (nr, tc->n_frames[i], 9);
if (tc->full_timestamp_flag[i]) {
tc->seconds_flag[i] = TRUE;
READ_UINT8 (nr, tc->seconds_value[i], 6);
tc->minutes_flag[i] = TRUE;
READ_UINT8 (nr, tc->minutes_value[i], 6);
tc->hours_flag[i] = TRUE;
READ_UINT8 (nr, tc->hours_value[i], 5);
} else {
READ_UINT8 (nr, tc->seconds_flag[i], 1);
if (tc->seconds_flag[i]) {
READ_UINT8 (nr, tc->seconds_value[i], 6);
READ_UINT8 (nr, tc->minutes_flag[i], 1);
if (tc->minutes_flag[i]) {
READ_UINT8 (nr, tc->minutes_value[i], 6);
READ_UINT8 (nr, tc->hours_flag[i], 1);
if (tc->hours_flag[i]) {
READ_UINT8 (nr, tc->hours_value[i], 5);
}
}
}
}
}
READ_UINT8 (nr, tc->time_offset_length[i], 5);
if (tc->time_offset_length[i] > 0)
READ_UINT32 (nr, tc->time_offset_value[i], tc->time_offset_length[i]);
}
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Time code\"");
return GST_H265_PARSER_ERROR;
}
/******** API *************/
/**
@ -2312,6 +2370,10 @@ gst_h265_parser_parse_sei_message (GstH265Parser * parser,
res = gst_h265_parser_parse_recovery_point (parser,
&sei->payload.recovery_point, nr);
break;
case GST_H265_SEI_TIME_CODE:
res = gst_h265_parser_parse_time_code (parser,
&sei->payload.time_code, nr);
break;
default:
/* Just consume payloadSize bytes, which does not account for
emulation prevention bytes */

34
gst-libs/gst/codecparsers/gsth265parser.h
View file

@ -221,6 +221,7 @@ typedef enum
* @GST_H265_SEI_BUF_PERIOD: Buffering Period SEI Message
* @GST_H265_SEI_PIC_TIMING: Picture Timing SEI Message
* @GST_H265_SEI_RECOVERY_POINT: Recovery Point SEI Message (D.3.8)
* @GST_H265_SEI_TIME_CODE: Time code SEI message (D.2.27) (Since 1.16)
* ...
*
* The type of SEI message.
@ -230,6 +231,7 @@ typedef enum
GST_H265_SEI_BUF_PERIOD = 0,
GST_H265_SEI_PIC_TIMING = 1,
GST_H265_SEI_RECOVERY_POINT = 6,
GST_H265_SEI_TIME_CODE = 136,
/* and more... */
} GstH265SEIPayloadType;
@ -316,6 +318,7 @@ typedef struct _GstH265SliceHdr GstH265SliceHdr;
typedef struct _GstH265PicTiming GstH265PicTiming;
typedef struct _GstH265BufferingPeriod GstH265BufferingPeriod;
typedef struct _GstH265RecoveryPoint GstH265RecoveryPoint;
typedef struct _GstH265TimeCode GstH265TimeCode;
typedef struct _GstH265SEIMessage GstH265SEIMessage;
/**
@ -1073,6 +1076,36 @@ struct _GstH265RecoveryPoint
guint8 broken_link_flag;
};
/**
* GstH265TimeCode:
* The time code SEI message provides time code information similar to that
* defined by SMPTE ST 12-1 (2014) for field(s) or frame(s) of the current
* picture.
*
* D.2.27
*
* Since: 1.16
*/
struct _GstH265TimeCode
{
guint8 num_clock_ts;
guint8 clock_timestamp_flag[3];
guint8 units_field_based_flag[3];
guint8 counting_type[3];
guint8 full_timestamp_flag[3];
guint8 discontinuity_flag[3];
guint8 cnt_dropped_flag[3];
guint16 n_frames[3];
guint8 seconds_flag[3];
guint8 seconds_value[3];
guint8 minutes_flag[3];
guint8 minutes_value[3];
guint8 hours_flag[3];
guint8 hours_value[3];
guint8 time_offset_length[3];
guint32 time_offset_value[3];
};
struct _GstH265SEIMessage
{
GstH265SEIPayloadType payloadType;
@ -1081,6 +1114,7 @@ struct _GstH265SEIMessage
GstH265BufferingPeriod buffering_period;
GstH265PicTiming pic_timing;
GstH265RecoveryPoint recovery_point;
GstH265TimeCode time_code;
/* ... could implement more */
} payload;
};

87
gst/videoparsers/gsth265parse.c
View file

@ -544,9 +544,14 @@ gst_h265_parse_process_sei (GstH265Parse * h265parse, GstH265NalUnit * nalu)
sei.payload.recovery_point.broken_link_flag);
h265parse->keyframe = TRUE;
break;
case GST_H265_SEI_BUF_PERIOD:
case GST_H265_SEI_TIME_CODE:
memcpy (&h265parse->time_code, &sei.payload.time_code,
sizeof (GstH265TimeCode));
break;
case GST_H265_SEI_PIC_TIMING:
h265parse->sei_pic_struct = sei.payload.pic_timing.pic_struct;
break;
case GST_H265_SEI_BUF_PERIOD:
/* FIXME */
break;
}
@ -1245,8 +1250,8 @@ gst_h265_parse_make_codec_data (GstH265Parse * h265parse)
}
data[6] |=
(pft->progressive_source_flag << 7) | (pft->interlaced_source_flag << 6) |
(pft->non_packed_constraint_flag << 5) | (pft->
frame_only_constraint_flag << 4);
(pft->
non_packed_constraint_flag << 5) | (pft->frame_only_constraint_flag << 4);
data[12] = pft->level_idc;
/* min_spatial_segmentation_idc */
GST_WRITE_UINT16_BE (data + 13, min_spatial_segmentation_idc);
@ -1701,9 +1706,13 @@ gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
/* but not necessarily or reliably this */
if (fps_num > 0 && fps_den > 0) {
GstStructure *s2;
GST_INFO_OBJECT (h265parse, "setting framerate in caps");
gst_caps_set_simple (caps, "framerate",
GST_TYPE_FRACTION, fps_num, fps_den, NULL);
s2 = gst_caps_get_structure (caps, 0);
gst_structure_get_fraction (s2, "framerate", &h265parse->parsed_fps_n,
&h265parse->parsed_fps_d);
gst_base_parse_set_frame_rate (GST_BASE_PARSE (h265parse),
fps_num, fps_den, 0, 0);
latency = gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
@ -2213,6 +2222,76 @@ gst_h265_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
}
}
{
guint i = 0;
for (i = 0; i < h265parse->time_code.num_clock_ts; i++) {
GstVideoTimeCodeFlags flags = 0;
gint field_count = -1;
if (!h265parse->time_code.clock_timestamp_flag[i])
break;
h265parse->time_code.clock_timestamp_flag[i] = 0;
/* Table D.2 */
switch (h265parse->sei_pic_struct) {
case GST_H265_SEI_PIC_STRUCT_FRAME:
case GST_H265_SEI_PIC_STRUCT_TOP_FIELD:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_FIELD:
field_count = h265parse->sei_pic_struct;
break;
case GST_H265_SEI_PIC_STRUCT_TOP_BOTTOM:
case GST_H265_SEI_PIC_STRUCT_TOP_PAIRED_PREVIOUS_BOTTOM:
case GST_H265_SEI_PIC_STRUCT_TOP_PAIRED_NEXT_BOTTOM:
field_count = i + 1;
break;
case GST_H265_SEI_PIC_STRUCT_BOTTOM_TOP:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_PAIRED_PREVIOUS_TOP:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_PAIRED_NEXT_TOP:
field_count = 2 - i;
break;
case GST_H265_SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
field_count = i % 2 ? 2 : 1;
break;
case GST_H265_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
field_count = i % 2 ? 1 : 2;
break;
case GST_H265_SEI_PIC_STRUCT_FRAME_DOUBLING:
case GST_H265_SEI_PIC_STRUCT_FRAME_TRIPLING:
field_count = 0;
break;
}
if (field_count == -1) {
GST_WARNING_OBJECT (parse,
"failed to determine field count for timecode");
field_count = 0;
}
/* Dropping of the two lowest (value 0 and 1) n_frames[ i ] counts when
* seconds_value[ i ] is equal to 0 and minutes_value[ i ] is not an integer
* multiple of 10 */
if (h265parse->time_code.counting_type[i] == 4)
flags |= GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
if (h265parse->sei_pic_struct != GST_H265_SEI_PIC_STRUCT_FRAME)
flags |= GST_VIDEO_TIME_CODE_FLAGS_INTERLACED;
gst_buffer_add_video_time_code_meta_full (buffer,
h265parse->parsed_fps_n,
h265parse->parsed_fps_d,
NULL,
flags,
h265parse->time_code.hours_flag[i] ? h265parse->time_code.
hours_value[i] : 0,
h265parse->time_code.minutes_flag[i] ? h265parse->time_code.
minutes_value[i] : 0,
h265parse->time_code.seconds_flag[i] ? h265parse->time_code.
seconds_value[i] : 0, h265parse->time_code.n_frames[i], field_count);
}
}
gst_h265_parse_reset_frame (h265parse);
return GST_FLOW_OK;

7
gst/videoparsers/gsth265parse.h
View file

@ -52,6 +52,7 @@ struct _GstH265Parse
gint fps_num, fps_den;
gint upstream_par_n, upstream_par_d;
gint parsed_par_n, parsed_par_d;
gint parsed_fps_n, parsed_fps_d;
/* current codec_data in output caps, if any */
GstBuffer *codec_data;
/* input codec_data, if any */
@ -86,6 +87,12 @@ struct _GstH265Parse
GstBuffer *sps_nals[GST_H265_MAX_SPS_COUNT];
GstBuffer *pps_nals[GST_H265_MAX_PPS_COUNT];
/* Infos we need to keep track of */
guint8 sei_pic_struct;
/* Collected TimeCode SEI */
GstH265TimeCode time_code;
gboolean discont;
/* frame parsing */