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dvdspu: Collect entire PGS packets and queue as events

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Collect fragmented PGS packets and submit as complete events for
processing at the correct moment.
This commit is contained in:
Jan Schmidt 2009-05-21 23:45:43 +01:00
parent 4e847cb4ac
commit 871287ba2a
1 changed files with 56 additions and 11 deletions
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67
gst/dvdspu/gstdvdspu.c
View file

@ -931,11 +931,15 @@ gst_dvd_spu_setup_cmd_blk (GstDVDSpu * dvdspu, guint16 cmd_blk_offset,
}
static void
gst_dvd_spu_handle_new_spu_buf (GstDVDSpu * dvdspu, SpuPacket * packet)
gst_dvd_spu_handle_new_vobsub_buf (GstDVDSpu * dvdspu, SpuPacket * packet)
{
guint8 *start, *end;
SpuState *state = &dvdspu->spu_state;
#if DUMP_DCSQ
gst_dvd_spu_dump_dcsq (dvdspu, packet->event_ts, packet->buf);
#endif
if (G_UNLIKELY (GST_BUFFER_SIZE (packet->buf) < 4))
goto invalid;
@ -1127,12 +1131,20 @@ gst_dvd_spu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts)
packet->buf ? "buffer" : "event");
if (packet->buf) {
#if DUMP_DCSQ
gst_dvd_spu_dump_dcsq (dvdspu, packet->event_ts, packet->buf);
#endif
gst_dvd_spu_handle_new_spu_buf (dvdspu, packet);
}
if (packet->event)
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
gst_dvd_spu_handle_new_vobsub_buf (dvdspu, packet);
break;
case SPU_INPUT_TYPE_PGS:
gstspu_dump_pgs_buffer (packet->buf);
gst_buffer_unref (packet->buf);
break;
default:
g_assert_not_reached ();
break;
}
g_assert (packet->event == NULL);
} else if (packet->event)
gst_dvd_spu_handle_dvd_event (dvdspu, packet->event);
g_free (packet);
@ -1277,6 +1289,9 @@ gst_dvd_spu_subpic_chain (GstPad * pad, GstBuffer * buf)
}
if (dvdspu->partial_spu != NULL) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
GST_WARNING_OBJECT (dvdspu,
"Joining subpicture buffer with timestamp to previous");
dvdspu->partial_spu = gst_buffer_join (dvdspu->partial_spu, buf);
} else {
/* If we don't yet have a buffer, wait for one with a timestamp,
@ -1317,11 +1332,41 @@ gst_dvd_spu_subpic_chain (GstPad * pad, GstBuffer * buf)
}
}
break;
case SPU_INPUT_TYPE_PGS:
gstspu_dump_pgs_buffer (dvdspu->partial_spu);
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
case SPU_INPUT_TYPE_PGS:{
/* Collect until we have a command buffer that ends exactly at the size
* we've collected */
guint8 packet_type;
guint16 packet_size;
guint8 *data = GST_BUFFER_DATA (dvdspu->partial_spu);
guint8 *end = data + GST_BUFFER_SIZE (dvdspu->partial_spu);
/* FIXME: There's no need to walk the command set each time. We can set a
* marker and resume where we left off next time */
while (data != end) {
if (data + 3 > end)
break;
packet_type = *data++;
packet_size = GST_READ_UINT16_BE (data);
data += 2;
if (data + packet_size > end)
break;
data += packet_size;
if (packet_type == PGS_COMMAND_END_DISPLAY && data != end) {
/* Extra cruft on the end of the packet -> assume invalid */
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
break;
}
}
if (dvdspu->partial_spu && data == end) {
g_print ("Complete packet of size %u\n",
GST_BUFFER_SIZE (dvdspu->partial_spu));
submit_new_spu_packet (dvdspu, dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
}
break;
}
default:
GST_ERROR_OBJECT (dvdspu, "Input type not configured before SPU passing");
goto caps_not_set;