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mxfmux: Write temporal offset and correct keyframe offset into index table

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=784027
This commit is contained in:
Sebastian Dröge 2017-06-27 15:01:22 +03:00
parent 830e89b7e9
commit 1069330f76
2 changed files with 118 additions and 23 deletions
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139
gst/mxf/mxfmux.c
View file

@ -265,6 +265,8 @@ gst_mxf_mux_reset (GstMXFMux * mux)
g_free (g_array_index (mux->index_table, MXFIndexTableSegment,
n).index_entries);
g_array_set_size (mux->index_table, 0);
mux->current_index_pos = 0;
mux->last_keyframe_pos = 0;
}
static gboolean
@ -1216,6 +1218,8 @@ gst_mxf_mux_handle_buffer (GstMXFMux * mux, GstMXFMuxPad * pad)
&& !pad->have_complete_edit_unit && buf == NULL;
gboolean is_keyframe = buf ?
!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT) : TRUE;
GstClockTime pts = buf ? GST_BUFFER_PTS (buf) : GST_CLOCK_TIME_NONE;
GstClockTime dts = buf ? GST_BUFFER_DTS (buf) : GST_CLOCK_TIME_NONE;
if (pad->have_complete_edit_unit) {
GST_DEBUG_OBJECT (pad,
@ -1268,35 +1272,124 @@ gst_mxf_mux_handle_buffer (GstMXFMux * mux, GstMXFMuxPad * pad)
if (mux->index_table->len == 0 ||
g_array_index (mux->index_table, MXFIndexTableSegment,
mux->index_table->len - 1).index_duration >= max_segment_size) {
MXFIndexTableSegment s;
mux->current_index_pos).index_duration >= max_segment_size) {
memset (&segment, 0, sizeof (segment));
if (mux->index_table->len > 0)
mux->current_index_pos++;
mxf_uuid_init (&s.instance_id, mux->metadata);
memcpy (&s.index_edit_rate, &pad->source_track->edit_rate,
sizeof (s.index_edit_rate));
s.index_start_position = pad->pos;
s.index_duration = 0;
s.edit_unit_byte_count = 0;
s.index_sid =
mux->preface->content_storage->essence_container_data[0]->index_sid;
s.body_sid =
mux->preface->content_storage->essence_container_data[0]->body_sid;
s.slice_count = 0;
s.pos_table_count = 0;
s.n_delta_entries = 0;
s.delta_entries = NULL;
s.n_index_entries = 0;
s.index_entries = g_new0 (MXFIndexEntry, max_segment_size);
g_array_append_val (mux->index_table, s);
if (mux->index_table->len <= mux->current_index_pos) {
MXFIndexTableSegment s;
memset (&segment, 0, sizeof (segment));
mxf_uuid_init (&s.instance_id, mux->metadata);
memcpy (&s.index_edit_rate, &pad->source_track->edit_rate,
sizeof (s.index_edit_rate));
if (mux->index_table->len > 0)
s.index_start_position =
g_array_index (mux->index_table, MXFIndexTableSegment,
mux->index_table->len - 1).index_start_position;
else
s.index_start_position = 0;
s.index_duration = 0;
s.edit_unit_byte_count = 0;
s.index_sid =
mux->preface->content_storage->essence_container_data[0]->index_sid;
s.body_sid =
mux->preface->content_storage->essence_container_data[0]->body_sid;
s.slice_count = 0;
s.pos_table_count = 0;
s.n_delta_entries = 0;
s.delta_entries = NULL;
s.n_index_entries = 0;
s.index_entries = g_new0 (MXFIndexEntry, max_segment_size);
g_array_append_val (mux->index_table, s);
}
}
segment =
&g_array_index (mux->index_table, MXFIndexTableSegment,
mux->index_table->len - 1);
mux->current_index_pos);
segment->index_entries[segment->n_index_entries].temporal_offset = 0;
segment->index_entries[segment->n_index_entries].key_frame_offset = 0;
if (dts != GST_CLOCK_TIME_NONE && pts != GST_CLOCK_TIME_NONE) {
guint64 pts_pos;
guint64 pts_index_pos, pts_segment_pos;
gint64 index_pos_diff;
MXFIndexTableSegment *pts_segment;
pts =
gst_segment_to_running_time (&pad->parent.segment, GST_FORMAT_TIME,
pts);
pts_pos =
gst_util_uint64_scale_round (pts, pad->source_track->edit_rate.n,
pad->source_track->edit_rate.d * GST_SECOND);
index_pos_diff = pts_pos - pad->pos;
pts_index_pos = mux->current_index_pos;
pts_segment_pos = segment->n_index_entries;
if (index_pos_diff >= 0) {
while (pts_segment_pos + index_pos_diff >= max_segment_size) {
index_pos_diff -= max_segment_size - pts_segment_pos;
pts_segment_pos = 0;
pts_index_pos++;
if (pts_index_pos >= mux->index_table->len) {
MXFIndexTableSegment s;
memset (&segment, 0, sizeof (segment));
mxf_uuid_init (&s.instance_id, mux->metadata);
memcpy (&s.index_edit_rate, &pad->source_track->edit_rate,
sizeof (s.index_edit_rate));
if (mux->index_table->len > 0)
s.index_start_position =
g_array_index (mux->index_table, MXFIndexTableSegment,
mux->index_table->len - 1).index_start_position;
else
s.index_start_position = 0;
s.index_duration = 0;
s.edit_unit_byte_count = 0;
s.index_sid =
mux->preface->content_storage->
essence_container_data[0]->index_sid;
s.body_sid =
mux->preface->content_storage->
essence_container_data[0]->body_sid;
s.slice_count = 0;
s.pos_table_count = 0;
s.n_delta_entries = 0;
s.delta_entries = NULL;
s.n_index_entries = 0;
s.index_entries = g_new0 (MXFIndexEntry, max_segment_size);
g_array_append_val (mux->index_table, s);
}
}
} else {
while (pts_segment_pos + index_pos_diff <= 0) {
if (pts_index_pos == 0) {
pts_index_pos = G_MAXUINT64;
break;
}
index_pos_diff += pts_segment_pos;
pts_segment_pos = max_segment_size;
pts_index_pos--;
}
}
if (pts_index_pos != G_MAXUINT64) {
g_assert (index_pos_diff < 127 && index_pos_diff >= -127);
pts_segment =
&g_array_index (mux->index_table, MXFIndexTableSegment,
pts_index_pos);
pts_segment->index_entries[pts_segment_pos +
index_pos_diff].temporal_offset = -index_pos_diff;
}
}
/* Leave temporal offset initialized at 0, above code will set it as necessary */
;
if (is_keyframe)
mux->last_keyframe_pos = pad->pos;
segment->index_entries[segment->n_index_entries].key_frame_offset =
MIN (pad->pos - mux->last_keyframe_pos, 127);
segment->index_entries[segment->n_index_entries].flags = is_keyframe ? 0x80 : 0x20; /* FIXME: Need to distinguish all the cases */
segment->index_entries[segment->n_index_entries].stream_offset =
mux->partition.body_offset;

2
gst/mxf/mxfmux.h
View file

@ -70,6 +70,8 @@ typedef struct _GstMXFMux {
gchar *application;
GArray *index_table;
guint current_index_pos;
guint64 last_keyframe_pos;
} GstMXFMux;
typedef struct _GstMXFMuxClass {