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dvbsuboverlay: Remove dvb_sub_feed() API

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GStreamer will only use dvb_sub_feed_with_pts, as it has its own PES filter
to do the header parsing.
This commit is contained in:
Mart Raudsepp 2010-11-30 03:47:46 +02:00 committed by Edward Hervey
parent 08c355823b
commit 7cab41013e
2 changed files with 0 additions and 98 deletions
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97
gst/dvbsuboverlay/dvb-sub.c
View file

@ -1385,103 +1385,6 @@ dvb_sub_new (void)
return dvbsub;
}
/**
* dvb_sub_feed:
* @dvb_sub: a #DvbSub
* @data: The data to feed to the parser
* @len: Length of the data
*
* Feeds the DvbSub parser with new PES packet data to parse.
* The data given must be a full PES packet, which must
* include a PTS field in the headers.
* Only one packet is handled in one call, so the available data
* should be fed continously until all is consumed.
*
* Return value: a negative value on errors, -4 if simply not enough data for the PES packet;
* Amount of data consumed (length of handled PES packet on success)
*/
gint
dvb_sub_feed (DvbSub * dvb_sub, guint8 * data, gint len)
{
guint64 pts = 0;
unsigned int pos = 0;
guint16 PES_packet_len;
guint8 PES_packet_header_len;
gboolean is_subtitle_packet = TRUE;
gboolean pts_field_present = FALSE;
g_warning ("Feeding %d bytes of data to dvbsub!!!!!!!!!!!!\n", len);
if (len == 0)
return 0;
if (len <= 8) {
dvb_log (DVB_LOG_PACKET, G_LOG_LEVEL_WARNING,
"Length %d too small for further processing", len);
return -1;
}
if (data[0] != 0x00 || data[1] != 0x00 || data[2] != 0x01) {
dvb_log (DVB_LOG_PACKET, G_LOG_LEVEL_WARNING,
"Data fed to dvb_sub_feed is not a PES packet - does not start with a code_prefix of 0x000001");
return 1; // FIXME: Probably handle it? - we need to skip PES_packet_len from this elementary stream then and move on
}
if (data[3] != 0xBD) {
dvb_log (DVB_LOG_PACKET, G_LOG_LEVEL_INFO,
"Data fed to dvb_sub_feed is not a PES packet of type private_stream_1, but rather '0x%X', so not a subtitle stream",
data[3]);
is_subtitle_packet = FALSE;
}
PES_packet_len = (data[4] << 8) | data[5];
dvb_log (DVB_LOG_PACKET, G_LOG_LEVEL_DEBUG,
"PES packet length is %u", PES_packet_len);
pos = 6;
/* FIXME: If the packet is cut, we could be feeding data more than we actually have here, which breaks everything. Probably need to buffer up and handle it,
* FIXME: Or push back in front to the file descriptor buffer (but we are using read, not libc buffered fread, so that idea might not be possible )*/
if ((len - 5) < PES_packet_len) {
dvb_log (DVB_LOG_PACKET, G_LOG_LEVEL_WARNING,
"!!!!!!!!!!! claimed PES packet length was %d, but we only had %d bytes available, falling back and waiting more !!!!!!!!!",
PES_packet_len, len - 5);
return -4;
}
/* FIXME: Validate sizes inbetween here */
/* If this is a non-subtitle packet, still skip the data, pretending we consumed it (FIXME: Signal up) */
if (!is_subtitle_packet) {
return pos + PES_packet_len;
}
pos++;
if (data[pos++] & 0x80) { /* PTS fields present (possibly also DTS). Technically this must be present per the spec */
pts_field_present = TRUE;
}
/* pos should be 8 now anyway */
pos = 8;
PES_packet_header_len = data[pos++];
if (pts_field_present) {
/* '001x', PTS[32..30], marker, PTS[29..15], marker, PTS[14..0], marker */
pts = ((guint64) (data[pos] & 0x0E)) << 29; /* PTS[32..30], ignore marker at rightmost bit */
pts |= ((guint64) (data[pos + 1])) << 22; /* PTS[29..22], full byte */
pts |= ((guint64) (data[pos + 2] & 0xFE)) << 14; /* PTS[21..15], ignore marker at rightmost bit */
pts |= ((guint64) (data[pos + 3])) << 7; /* PTS[14.. 7], full byte */
pts |= ((guint64) (data[pos + 4] & 0xFE)) >> 1; /* PTS[ 6.. 0], ignore marker at rightmost bit */
}
pos += PES_packet_header_len; /* FIXME: Currently including all header values with all but PTS ignored */
dvb_sub_feed_with_pts (dvb_sub, pts, data + pos, PES_packet_len - PES_packet_header_len - 3); /* 2 bytes between PES_packet_len and PES_packet_header_len fields, minus header_len itself */
pos += PES_packet_len - PES_packet_header_len - 3;
dvb_log (DVB_LOG_PACKET, G_LOG_LEVEL_DEBUG,
"Finished PES packet - consumed %u bytes of %d", pos, len);
return pos;
}
#define DVB_SUB_SEGMENT_PAGE_COMPOSITION 0x10
#define DVB_SUB_SEGMENT_REGION_COMPOSITION 0x11
#define DVB_SUB_SEGMENT_CLUT_DEFINITION 0x12

1
gst/dvbsuboverlay/dvb-sub.h
View file

@ -124,7 +124,6 @@ typedef struct {
GType dvb_sub_get_type (void) G_GNUC_CONST;
DvbSub *dvb_sub_new (void);
gint dvb_sub_feed (DvbSub *dvb_sub, guint8 *data, gint len);
gint dvb_sub_feed_with_pts (DvbSub *dvb_sub, guint64 pts, guint8 *data, gint len);
void dvb_sub_set_callbacks (DvbSub *dvb_sub, DvbSubCallbacks *callbacks, gpointer user_data);