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mpegtsbase: Use an array to track programs

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We need to be able to look for programs by their PID also. Using a hash table
was a bit sub-par (and overkill) for storing a range of programs.

This is needed because there could potentially be two programs with the same
program id but different PMT PID (while one is being deactivated the new one
would "exist").

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1893>
This commit is contained in:
Edward Hervey 2021-11-02 09:18:57 +01:00 committed by GStreamer Marge Bot
parent 2943d92389
commit 76543ee73a
2 changed files with 36 additions and 43 deletions
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77
subprojects/gst-plugins-bad/gst/mpegtsdemux/mpegtsbase.c
View file

@ -96,7 +96,7 @@ static gboolean mpegts_base_get_tags_from_eit (MpegTSBase * base,
GstMpegtsSection * section);
static gboolean mpegts_base_parse_atsc_mgt (MpegTSBase * base,
GstMpegtsSection * section);
static gboolean remove_each_program (gpointer key, MpegTSBaseProgram * program,
static void remove_each_program (MpegTSBaseProgram * program,
MpegTSBase * base);
static void
@ -241,8 +241,8 @@ mpegts_base_reset (MpegTSBase * base)
base->seen_pat = FALSE;
base->seek_offset = -1;
g_hash_table_foreach_remove (base->programs, (GHRFunc) remove_each_program,
base);
g_ptr_array_foreach (base->programs, (GFunc) remove_each_program, base);
g_ptr_array_remove_range (base->programs, 0, base->programs->len);
base->streams_aware = GST_OBJECT_PARENT (base)
&& GST_OBJECT_FLAG_IS_SET (GST_OBJECT_PARENT (base),
@ -269,8 +269,8 @@ mpegts_base_init (MpegTSBase * base)
base->disposed = FALSE;
base->packetizer = mpegts_packetizer_new ();
base->programs = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) mpegts_base_free_program);
base->programs =
g_ptr_array_new_full (16, (GDestroyNotify) mpegts_base_free_program);
base->parse_private_sections = FALSE;
base->is_pes = g_new0 (guint8, 1024);
@ -310,7 +310,7 @@ mpegts_base_finalize (GObject * object)
g_ptr_array_unref (base->pat);
base->pat = NULL;
}
g_hash_table_destroy (base->programs);
g_ptr_array_free (base->programs, TRUE);
gst_event_replace (&base->seek_event, NULL);
@ -354,8 +354,7 @@ typedef struct
} PIDLookup;
static void
foreach_pid_in_program (gpointer key, MpegTSBaseProgram * program,
PIDLookup * lookup)
foreach_pid_in_program (MpegTSBaseProgram * program, PIDLookup * lookup)
{
if (!program->active)
return;
@ -370,8 +369,7 @@ mpegts_pid_in_active_programs (MpegTSBase * base, guint16 pid)
lookup.res = FALSE;
lookup.pid = pid;
g_hash_table_foreach (base->programs, (GHFunc) foreach_pid_in_program,
&lookup);
g_ptr_array_foreach (base->programs, (GFunc) foreach_pid_in_program, &lookup);
return lookup.res;
}
@ -434,7 +432,7 @@ mpegts_base_new_program (MpegTSBase * base,
MpegTSBaseProgram *program;
gchar *upstream_id, *stream_id;
GST_DEBUG_OBJECT (base, "program_number : %d, pmt_pid : %d",
GST_DEBUG_OBJECT (base, "program_number : %d, pmt_pid : 0x%04x",
program_number, pmt_pid);
program = g_malloc0 (base->program_size);
@ -459,7 +457,7 @@ mpegts_base_add_program (MpegTSBase * base,
{
MpegTSBaseProgram *program;
GST_DEBUG_OBJECT (base, "program_number : %d, pmt_pid : %d",
GST_DEBUG_OBJECT (base, "program_number : %d, pmt_pid : 0x%04x",
program_number, pmt_pid);
program = mpegts_base_new_program (base, program_number, pmt_pid);
@ -471,8 +469,8 @@ mpegts_base_add_program (MpegTSBase * base,
}
MPEGTS_BIT_SET (base->known_psi, pmt_pid);
g_hash_table_insert (base->programs,
GINT_TO_POINTER (program_number), program);
g_ptr_array_add (base->programs, program);
return program;
}
@ -480,27 +478,28 @@ mpegts_base_add_program (MpegTSBase * base,
MpegTSBaseProgram *
mpegts_base_get_program (MpegTSBase * base, gint program_number)
{
MpegTSBaseProgram *program;
guint i;
program = (MpegTSBaseProgram *) g_hash_table_lookup (base->programs,
GINT_TO_POINTER ((gint) program_number));
return program;
for (i = 0; i < base->programs->len; i++) {
MpegTSBaseProgram *program = g_ptr_array_index (base->programs, i);
if (program->program_number == program_number)
return program;
}
return NULL;
}
static MpegTSBaseProgram *
mpegts_base_steal_program (MpegTSBase * base, gint program_number)
{
MpegTSBaseProgram *program;
guint i;
program = (MpegTSBaseProgram *) g_hash_table_lookup (base->programs,
GINT_TO_POINTER ((gint) program_number));
for (i = 0; i < base->programs->len; i++) {
MpegTSBaseProgram *program = g_ptr_array_index (base->programs, i);
if (program->program_number == program_number)
return g_ptr_array_steal_index (base->programs, i);
}
if (program)
g_hash_table_steal (base->programs,
GINT_TO_POINTER ((gint) program_number));
return program;
return NULL;
}
static void
@ -551,11 +550,11 @@ mpegts_base_deactivate_and_free_program (MpegTSBase * base,
}
static void
mpegts_base_remove_program (MpegTSBase * base, gint program_number)
mpegts_base_remove_program (MpegTSBase * base, MpegTSBaseProgram * program)
{
GST_DEBUG_OBJECT (base, "program_number : %d", program_number);
GST_DEBUG_OBJECT (base, "program_number : %d", program->program_number);
g_hash_table_remove (base->programs, GINT_TO_POINTER (program_number));
g_ptr_array_remove (base->programs, program);
}
static guint32
@ -1107,12 +1106,11 @@ mpegts_base_apply_pat (MpegTSBase * base, GstMpegtsSection * section)
if (klass->can_remove_program (base, program)) {
mpegts_base_deactivate_program (base, program);
mpegts_base_remove_program (base, patp->program_number);
mpegts_base_remove_program (base, program);
} else {
/* sub-class now owns the program and must call
* mpegts_base_deactivate_and_free_program later */
g_hash_table_steal (base->programs,
GINT_TO_POINTER ((gint) patp->program_number));
mpegts_base_steal_program (base, patp->program_number);
}
/* FIXME: when this happens it may still be pmt pid of another
* program, so setting to False may make it go through expensive
@ -1197,12 +1195,10 @@ mpegts_base_apply_pmt (MpegTSBase * base, GstMpegtsSection * section)
} else {
/* sub-class now owns the program and must call
* mpegts_base_deactivate_and_free_program later */
g_hash_table_steal (base->programs,
GINT_TO_POINTER ((gint) old_program->program_number));
mpegts_base_steal_program (base, old_program->program_number);
}
/* Add new program to the programs we track */
g_hash_table_insert (base->programs,
GINT_TO_POINTER (program_number), program);
g_ptr_array_add (base->programs, program);
initial_program = FALSE;
} else {
GST_DEBUG ("Program update, re-using same program");
@ -1362,14 +1358,11 @@ mpegts_base_get_tags_from_eit (MpegTSBase * base, GstMpegtsSection * section)
return TRUE;
}
static gboolean
remove_each_program (gpointer key, MpegTSBaseProgram * program,
MpegTSBase * base)
static void
remove_each_program (MpegTSBaseProgram * program, MpegTSBase * base)
{
/* First deactivate it */
mpegts_base_deactivate_program (base, program);
return TRUE;
}
static inline GstFlowReturn

2
subprojects/gst-plugins-bad/gst/mpegtsdemux/mpegtsbase.h
View file

@ -123,7 +123,7 @@ struct _MpegTSBase {
/* the following vars must be protected with the OBJECT_LOCK as they can be
* accessed from the application thread and the streaming thread */
GHashTable *programs;
GPtrArray *programs;
GPtrArray *pat;
MpegTSPacketizer2 *packetizer;