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mpegtspacketizer: Avoid alloc/free where possible

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Helps for streams with a lot of sections, like EIT
This commit is contained in:
Edward Hervey 2012-06-04 08:39:11 +02:00
parent aab8c46f10
commit f0867c7247
3 changed files with 18 additions and 10 deletions
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1
gst/mpegtsdemux/mpegtsbase.c
View file

@ -1437,7 +1437,6 @@ mpegts_base_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
if (G_LIKELY (section.complete)) {
/* section complete */
based = mpegts_base_handle_psi (base, &section);
g_free (section.data);
if (G_UNLIKELY (!based)) {
/* bad PSI table */

19
gst/mpegtsdemux/mpegtspacketizer.c
View file

@ -172,9 +172,6 @@ mpegts_packetizer_stream_new (void)
static void
mpegts_packetizer_clear_section (MpegTSPacketizerStream * stream)
{
if (stream->section_data)
g_free (stream->section_data);
stream->section_data = NULL;
stream->continuity_counter = CONTINUITY_UNSET;
stream->section_length = 0;
stream->section_offset = 0;
@ -185,6 +182,8 @@ static void
mpegts_packetizer_stream_free (MpegTSPacketizerStream * stream)
{
mpegts_packetizer_clear_section (stream);
if (stream->section_data)
g_free (stream->section_data);
g_slist_foreach (stream->subtables, (GFunc) g_free, NULL);
g_slist_free (stream->subtables);
g_free (stream);
@ -399,9 +398,8 @@ mpegts_packetizer_parse_section_header (MpegTSPacketizer2 * packetizer,
GSList *subtable_list = NULL;
section->complete = TRUE;
/* get the section buffer, pass the ownership to the caller */
/* get the section buffer, ownership stays with the stream */
data = section->data = stream->section_data;
stream->section_data = NULL;
section->offset = stream->offset;
GST_MEMDUMP ("section header", data, stream->section_length);
@ -476,7 +474,6 @@ no_changes:
section->pid, section->table_id, section->subtable_extension,
section->current_next_indicator, section->version_number, section->crc);
section->complete = FALSE;
g_free (section->data);
return TRUE;
not_applicable:
@ -485,7 +482,6 @@ not_applicable:
section->pid, section->table_id, section->subtable_extension,
section->current_next_indicator, section->version_number, section->crc);
section->complete = FALSE;
g_free (section->data);
return TRUE;
}
@ -2567,7 +2563,14 @@ mpegts_packetizer_push_section (MpegTSPacketizer2 * packetizer,
stream->section_length = section_length;
/* Create enough room to store chunks of sections, including FF padding */
stream->section_data = g_malloc (section_length + 188);
if (stream->section_allocated == 0) {
stream->section_data = g_malloc (section_length + 188);
stream->section_allocated = section_length + 188;
} else if (G_UNLIKELY (stream->section_allocated < section_length + 188)) {
stream->section_data =
g_realloc (stream->section_data, section_length + 188);
stream->section_allocated = section_length + 188;
}
memcpy (stream->section_data, data_start, packet->data_end - data_start);
stream->section_offset = packet->data_end - data_start;

8
gst/mpegtsdemux/mpegtspacketizer.h
View file

@ -64,14 +64,20 @@ typedef struct
{
guint continuity_counter;
/* Section data (reused) */
guint8 *section_data;
/* Expected length of the section */
guint section_length;
/* Allocated length of section_data */
guint section_allocated;
/* Current offset in section_data */
guint16 section_offset;
/* table_id of the pending section_data */
guint8 section_table_id;
GSList *subtables;
/* Offset of the data contained in the section */
/* Upstream offset of the data contained in the section */
guint64 offset;
} MpegTSPacketizerStream;