gstreamer/gst/mpegtsparse/mpegtsparse.c
Stefan Kost a43a4d5747 gst/mpegtsparse/mpegtsparse.c: Fix the build (missing stdlib.h).
Original commit message from CVS:
* gst/mpegtsparse/mpegtsparse.c:
Fix the build (missing stdlib.h).
2007-09-06 20:37:56 +00:00

973 lines
26 KiB
C

/*
* mpegtsparse.c -
* Copyright (C) 2007 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include "mpegtsparse.h"
#include "mpegtsparsemarshal.h"
#include "flutspatinfo.h"
#include "flutspmtinfo.h"
#include "flutspmtstreaminfo.h"
GST_DEBUG_CATEGORY_STATIC (mpegts_parse_debug);
#define GST_CAT_DEFAULT mpegts_parse_debug
typedef struct _MpegTSParsePad MpegTSParsePad;
typedef struct
{
guint16 pid;
guint8 stream_type;
} MpegTSParseStream;
typedef struct
{
gint program_number;
guint16 pmt_pid;
GObject *pmt_info;
GHashTable *streams;
gint patcount;
gint selected;
gboolean active;
MpegTSParsePad *tspad;
} MpegTSParseProgram;
struct _MpegTSParsePad
{
GstPad *pad;
/* the program number that the peer wants on this pad */
gint program_number;
MpegTSParseProgram *program;
/* set to FALSE before a push and TRUE after */
gboolean pushed;
/* the return of the latest push */
GstFlowReturn flow_return;
};
static GstElementDetails mpegts_parse_details =
GST_ELEMENT_DETAILS ("MPEG transport stream parser",
"Codec/Parser",
"Parses MPEG2 transport streams",
"Alessandro Decina <alessandro@nnva.org>");
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpegts, " "systemstream = (boolean) true ")
);
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpegts, " "systemstream = (boolean) true ")
);
static GstStaticPadTemplate program_template =
GST_STATIC_PAD_TEMPLATE ("program_%d", GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/mpegts, " "systemstream = (boolean) true ")
);
enum
{
SIGNAL_PMT,
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
PROP_PROGRAM_NUMBERS,
PROP_PAT_INFO
/* FILL ME */
};
static void mpegts_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void mpegts_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void mpegts_parse_dispose (GObject * object);
static void mpegts_parse_finalize (GObject * object);
static MpegTSParsePad *mpegts_parse_create_tspad (MpegTSParse * parse,
const gchar * name);
static void mpegts_parse_destroy_tspad (MpegTSParse * parse,
MpegTSParsePad * tspad);
static GstPad *mpegts_parse_activate_program (MpegTSParse * parse,
MpegTSParseProgram * program);
static void mpegts_parse_free_program (MpegTSParseProgram * program);
static void mpegts_parse_free_stream (MpegTSParseStream * ptream);
static void mpegts_parse_reset_selected_programs (MpegTSParse * parse,
gchar * programs);
static void mpegts_parse_pad_removed (GstElement * element, GstPad * pad);
static GstFlowReturn mpegts_parse_chain (GstPad * pad, GstBuffer * buf);
static gboolean mpegts_parse_sink_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn mpegts_parse_change_state (GstElement * element,
GstStateChange transition);
static guint signals[LAST_SIGNAL] = { 0 };
GST_BOILERPLATE (MpegTSParse, mpegts_parse, GstElement, GST_TYPE_ELEMENT);
static void
mpegts_parse_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&program_template));
gst_element_class_set_details (element_class, &mpegts_parse_details);
}
static void
mpegts_parse_class_init (MpegTSParseClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
element_class = GST_ELEMENT_CLASS (klass);
element_class->pad_removed = mpegts_parse_pad_removed;
element_class->change_state = mpegts_parse_change_state;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = mpegts_parse_set_property;
gobject_class->get_property = mpegts_parse_get_property;
gobject_class->dispose = mpegts_parse_dispose;
gobject_class->finalize = mpegts_parse_finalize;
g_object_class_install_property (gobject_class, PROP_PROGRAM_NUMBERS,
g_param_spec_string ("program-numbers",
"Program Numbers",
"Colon separated list of programs", "", G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_PAT_INFO,
g_param_spec_value_array ("pat-info",
"GValueArray containing GObjects with properties",
"Array of GObjects containing information from the TS PAT "
"about all programs listed in the current Program Association "
"Table (PAT)",
g_param_spec_object ("flu-pat-streaminfo", "FluPATStreamInfo",
"Fluendo TS Demuxer PAT Stream info object",
MPEGTS_TYPE_PAT_INFO, G_PARAM_READABLE), G_PARAM_READABLE));
signals[SIGNAL_PMT] =
g_signal_new ("pmt-info", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MpegTSParseClass, pmt_info), NULL, NULL,
mpegts_parse_marshal_VOID__INT_OBJECT, G_TYPE_NONE, 2, G_TYPE_INT,
MPEGTS_TYPE_PMT_INFO);
}
static gboolean
foreach_psi_pid_remove (gpointer key, gpointer value, gpointer data)
{
return TRUE;
}
static void
mpegts_parse_reset (MpegTSParse * parse)
{
mpegts_packetizer_clear (parse->packetizer);
g_hash_table_foreach_remove (parse->psi_pids, foreach_psi_pid_remove, NULL);
/* PAT */
g_hash_table_insert (parse->psi_pids,
GINT_TO_POINTER (0), GINT_TO_POINTER (1));
/* pmt pids will be added and removed dinamically */
}
static void
mpegts_parse_init (MpegTSParse * parse, MpegTSParseClass * klass)
{
parse->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_chain_function (parse->sinkpad, mpegts_parse_chain);
gst_pad_set_event_function (parse->sinkpad, mpegts_parse_sink_event);
gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
parse->srcpad = mpegts_parse_create_tspad (parse, "src")->pad;
gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
parse->disposed = FALSE;
parse->packetizer = mpegts_packetizer_new ();
parse->program_numbers = g_strdup ("");
parse->pads_to_add = NULL;
parse->programs = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) mpegts_parse_free_program);
parse->psi_pids = g_hash_table_new (g_direct_hash, g_direct_equal);
mpegts_parse_reset (parse);
}
static void
mpegts_parse_dispose (GObject * object)
{
MpegTSParse *parse = GST_MPEGTS_PARSE (object);
if (!parse->disposed) {
g_object_unref (parse->packetizer);
parse->disposed = TRUE;
}
if (G_OBJECT_CLASS (parent_class)->dispose)
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
mpegts_parse_finalize (GObject * object)
{
MpegTSParse *parse = GST_MPEGTS_PARSE (object);
g_free (parse->program_numbers);
if (parse->pat_info)
g_value_array_free (parse->pat_info);
g_hash_table_destroy (parse->programs);
g_hash_table_destroy (parse->psi_pids);
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
mpegts_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
MpegTSParse *parse = GST_MPEGTS_PARSE (object);
switch (prop_id) {
case PROP_PROGRAM_NUMBERS:
mpegts_parse_reset_selected_programs (parse, g_value_dup_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mpegts_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
MpegTSParse *parse = GST_MPEGTS_PARSE (object);
switch (prop_id) {
case PROP_PROGRAM_NUMBERS:
g_value_set_string (value, parse->program_numbers);
break;
case PROP_PAT_INFO:
g_value_set_boxed (value, parse->pat_info);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static MpegTSParseProgram *
mpegts_parse_add_program (MpegTSParse * parse,
gint program_number, guint16 pmt_pid)
{
MpegTSParseProgram *program;
program = g_new0 (MpegTSParseProgram, 1);
program->program_number = program_number;
program->pmt_pid = pmt_pid;
program->streams = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) mpegts_parse_free_stream);
program->patcount = 1;
program->selected = 0;
program->active = FALSE;
g_hash_table_insert (parse->programs,
GINT_TO_POINTER (program_number), program);
return program;
}
static MpegTSParseProgram *
mpegts_parse_get_program (MpegTSParse * parse, gint program_number)
{
MpegTSParseProgram *program;
program = (MpegTSParseProgram *) g_hash_table_lookup (parse->programs,
GINT_TO_POINTER ((gint) program_number));
return program;
}
static GstPad *
mpegts_parse_activate_program (MpegTSParse * parse,
MpegTSParseProgram * program)
{
MpegTSParsePad *tspad;
gchar *pad_name;
pad_name = g_strdup_printf ("program_%d", program->program_number);
tspad = mpegts_parse_create_tspad (parse, pad_name);
tspad->program_number = program->program_number;
tspad->program = program;
program->tspad = tspad;
g_free (pad_name);
gst_pad_set_active (tspad->pad, TRUE);
program->active = TRUE;
return tspad->pad;
}
static GstPad *
mpegts_parse_deactivate_program (MpegTSParse * parse,
MpegTSParseProgram * program)
{
MpegTSParsePad *tspad;
tspad = program->tspad;
gst_pad_set_active (tspad->pad, FALSE);
program->active = FALSE;
/* tspad will be destroyed in GstElementClass::pad_removed */
return tspad->pad;
}
static void
mpegts_parse_free_program (MpegTSParseProgram * program)
{
if (program->pmt_info)
g_object_unref (program->pmt_info);
g_hash_table_destroy (program->streams);
g_free (program);
}
static void
mpegts_parse_remove_program (MpegTSParse * parse, gint program_number)
{
g_hash_table_remove (parse->programs, GINT_TO_POINTER (program_number));
}
static void
mpegts_parse_sync_program_pads (MpegTSParse * parse,
GList * to_add, GList * to_remove)
{
GList *walk;
for (walk = to_remove; walk; walk = walk->next)
gst_element_remove_pad (GST_ELEMENT (parse), GST_PAD (walk->data));
for (walk = to_add; walk; walk = walk->next)
gst_element_add_pad (GST_ELEMENT (parse), GST_PAD (walk->data));
if (to_add)
g_list_free (to_add);
if (to_remove)
g_list_free (to_remove);
}
static MpegTSParseStream *
mpegts_parse_program_add_stream (MpegTSParse * parse,
MpegTSParseProgram * program, guint16 pid, guint8 stream_type)
{
MpegTSParseStream *stream;
stream = g_new0 (MpegTSParseStream, 1);
stream->pid = pid;
stream->stream_type = stream_type;
g_hash_table_insert (program->streams, GINT_TO_POINTER ((gint) pid), stream);
return stream;
}
static void
foreach_program_activate_or_deactivate (gpointer key, gpointer value,
gpointer data)
{
MpegTSParse *parse = GST_MPEGTS_PARSE (data);
MpegTSParseProgram *program = (MpegTSParseProgram *) value;
/* at this point selected programs have program->selected == 2,
* unselected programs thay may have to be deactivated have selected == 1 and
* unselected inactive programs have selected == 0 */
switch (--program->selected) {
case 1:
/* selected */
if (!program->active && program->pmt_pid != G_MAXUINT16)
parse->pads_to_add = g_list_append (parse->pads_to_add,
mpegts_parse_activate_program (parse, program));
break;
case 0:
/* unselected */
if (program->active)
parse->pads_to_remove = g_list_append (parse->pads_to_remove,
mpegts_parse_deactivate_program (parse, program));
break;
case -1:
/* was already unselected */
program->selected = 0;
break;
default:
g_return_if_reached ();
}
}
static void
mpegts_parse_reset_selected_programs (MpegTSParse * parse,
gchar * program_numbers)
{
GList *pads_to_add = NULL;
GList *pads_to_remove = NULL;
GST_OBJECT_LOCK (parse);
if (parse->program_numbers)
g_free (parse->program_numbers);
parse->program_numbers = program_numbers;
if (*parse->program_numbers != '\0') {
gint program_number;
MpegTSParseProgram *program;
gchar **progs, **walk;
progs = g_strsplit (parse->program_numbers, ":", 0);
walk = progs;
while (*walk != NULL) {
program_number = strtol (*walk, NULL, 0);
program = mpegts_parse_get_program (parse, program_number);
if (program == NULL)
/* create the program, it will get activated once we get a PMT for it */
program = mpegts_parse_add_program (parse, program_number, G_MAXUINT16);
program->selected = 2;
++walk;
}
g_strfreev (progs);
}
g_hash_table_foreach (parse->programs,
foreach_program_activate_or_deactivate, parse);
pads_to_add = parse->pads_to_add;
parse->pads_to_add = NULL;
pads_to_remove = parse->pads_to_remove;
parse->pads_to_remove = NULL;
GST_OBJECT_UNLOCK (parse);
mpegts_parse_sync_program_pads (parse, pads_to_add, pads_to_remove);
}
static void
mpegts_parse_free_stream (MpegTSParseStream * stream)
{
g_free (stream);
}
static void
mpegts_parse_program_remove_stream (MpegTSParse * parse,
MpegTSParseProgram * program, guint16 pid)
{
g_hash_table_remove (program->streams, GINT_TO_POINTER ((gint) pid));
}
static MpegTSParsePad *
mpegts_parse_create_tspad (MpegTSParse * parse, const gchar * pad_name)
{
GstPad *pad;
MpegTSParsePad *tspad;
pad = gst_pad_new_from_static_template (&program_template, pad_name);
/* create our wrapper */
tspad = g_new0 (MpegTSParsePad, 1);
tspad->pad = pad;
tspad->program_number = -1;
tspad->program = NULL;
tspad->pushed = FALSE;
tspad->flow_return = GST_FLOW_NOT_LINKED;
gst_pad_set_element_private (pad, tspad);
return tspad;
}
static void
mpegts_parse_destroy_tspad (MpegTSParse * parse, MpegTSParsePad * tspad)
{
/* free the wrapper */
g_free (tspad);
}
static void
mpegts_parse_pad_removed (GstElement * element, GstPad * pad)
{
MpegTSParsePad *tspad;
MpegTSParse *parse = GST_MPEGTS_PARSE (element);
if (gst_pad_get_direction (pad) == GST_PAD_SINK)
return;
tspad = (MpegTSParsePad *) gst_pad_get_element_private (pad);
mpegts_parse_destroy_tspad (parse, tspad);
}
static GstFlowReturn
mpegts_parse_tspad_push (MpegTSParse * parse, MpegTSParsePad * tspad,
guint16 pid, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_NOT_LINKED;
GHashTable *pad_pids = NULL;
guint16 pmt_pid = G_MAXUINT16;
if (tspad->program_number != -1) {
if (tspad->program) {
pad_pids = tspad->program->streams;
pmt_pid = tspad->program->pmt_pid;
} else {
/* there's a program filter on the pad but the PMT for the program has not
* been parsed yet, ignore the pad until we get a PMT */
gst_buffer_unref (buffer);
ret = GST_FLOW_OK;
goto out;
}
}
/* FIXME: send all the SI pids not only PAT and PMT */
if (pad_pids == NULL || pid == 0 || pid == pmt_pid ||
g_hash_table_lookup (pad_pids, GINT_TO_POINTER ((gint) pid)) != NULL) {
/* push if there's no filter or if the pid is in the filter */
ret = gst_pad_push (tspad->pad, buffer);
} else {
gst_buffer_unref (buffer);
/* caps don't include this pid */
if (gst_pad_is_linked (tspad->pad))
ret = GST_FLOW_OK;
}
out:
return ret;
}
static void
pad_clear_for_push (GstPad * pad, MpegTSParse * parse)
{
MpegTSParsePad *tspad = (MpegTSParsePad *) gst_pad_get_element_private (pad);
tspad->flow_return = GST_FLOW_NOT_LINKED;
tspad->pushed = FALSE;
}
static GstFlowReturn
mpegts_parse_push (MpegTSParse * parse, MpegTSPacketizerPacket * packet)
{
GstIterator *iterator;
gboolean done = FALSE;
gpointer pad = NULL;
MpegTSParsePad *tspad;
guint16 pid;
GstBuffer *buffer;
GstFlowReturn ret = GST_FLOW_NOT_LINKED;
GstCaps *caps;
pid = packet->pid;
caps = gst_pad_get_caps (parse->srcpad);
buffer = packet->buffer;
gst_buffer_set_caps (buffer, caps);
gst_caps_unref (caps);
GST_OBJECT_LOCK (parse);
/* clear tspad->pushed on pads */
g_list_foreach (GST_ELEMENT_CAST (parse)->srcpads,
(GFunc) pad_clear_for_push, parse);
GST_OBJECT_UNLOCK (parse);
iterator = gst_element_iterate_src_pads (GST_ELEMENT_CAST (parse));
while (!done) {
switch (gst_iterator_next (iterator, &pad)) {
case GST_ITERATOR_OK:
tspad = gst_pad_get_element_private (GST_PAD (pad));
/* make sure to push only once if the iterator resyncs */
if (!tspad->pushed) {
/* ref the buffer as gst_pad_push takes a ref but we want to reuse the
* same buffer for next pushes */
gst_buffer_ref (buffer);
tspad->flow_return =
mpegts_parse_tspad_push (parse, tspad, pid, buffer);
tspad->pushed = TRUE;
if (GST_FLOW_IS_FATAL (tspad->flow_return)) {
/* return the error upstream */
ret = tspad->flow_return;
done = TRUE;
}
}
if (ret == GST_FLOW_NOT_LINKED)
ret = tspad->flow_return;
/* the iterator refs the pad */
g_object_unref (GST_PAD (pad));
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (iterator);
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
default:
g_warning ("this should not be reached");
}
}
gst_iterator_free (iterator);
gst_buffer_unref (buffer);
packet->buffer = NULL;
return ret;
}
static gboolean
mpegts_parse_is_psi_pid (MpegTSParse * parse, guint16 pid)
{
return g_hash_table_lookup (parse->psi_pids,
GINT_TO_POINTER ((gint) pid)) != NULL;
}
static void
mpegts_parse_apply_pat (MpegTSParse * parse, GValueArray * pat_info)
{
GValue *value;
GValueArray *old_pat;
GObject *program_info;
gint program_number;
guint pid;
MpegTSParseProgram *program;
gint i;
GList *pads_to_add = NULL;
GList *pads_to_remove = NULL;
old_pat = parse->pat_info;
parse->pat_info = pat_info;
g_object_notify (G_OBJECT (parse), "pat-info");
GST_OBJECT_LOCK (parse);
/* activate the new table */
for (i = 0; i < pat_info->n_values; ++i) {
value = g_value_array_get_nth (pat_info, i);
program_info = g_value_get_object (value);
g_object_get (program_info,
"program-number", &program_number, "pid", &pid, NULL);
program = mpegts_parse_get_program (parse, program_number);
if (program) {
if (program->pmt_pid != pid) {
if (program->pmt_pid != G_MAXUINT16) {
/* pmt pid changed */
g_hash_table_remove (parse->psi_pids,
GINT_TO_POINTER ((gint) program->pmt_pid));
}
program->pmt_pid = pid;
g_hash_table_insert (parse->psi_pids,
GINT_TO_POINTER ((gint) pid), GINT_TO_POINTER (1));
}
program->patcount += 1;
} else {
GST_INFO_OBJECT (parse, "PAT adding program %d pmt_pid %d",
program_number, pid);
g_hash_table_insert (parse->psi_pids,
GINT_TO_POINTER ((gint) pid), GINT_TO_POINTER (1));
program = mpegts_parse_add_program (parse, program_number, pid);
}
if (program->selected && !program->active)
parse->pads_to_add = g_list_append (parse->pads_to_add,
mpegts_parse_activate_program (parse, program));
}
if (old_pat) {
/* deactivate the old table */
for (i = 0; i < old_pat->n_values; ++i) {
value = g_value_array_get_nth (old_pat, i);
program_info = g_value_get_object (value);
g_object_get (program_info,
"program-number", &program_number, "pid", &pid, NULL);
program = mpegts_parse_get_program (parse, program_number);
if (program->patcount-- == 1)
/* the program has been referenced by the new pat, keep it */
continue;
GST_INFO_OBJECT (parse, "PAT removing program %d pmt_pid %d",
program_number, pid);
if (program->active)
parse->pads_to_remove = g_list_append (parse->pads_to_remove,
mpegts_parse_deactivate_program (parse, program));
mpegts_parse_remove_program (parse, program_number);
g_hash_table_remove (parse->psi_pids, GINT_TO_POINTER ((gint) pid));
}
g_value_array_free (old_pat);
}
pads_to_add = parse->pads_to_add;
parse->pads_to_add = NULL;
pads_to_remove = parse->pads_to_remove;
parse->pads_to_remove = NULL;
GST_OBJECT_UNLOCK (parse);
mpegts_parse_sync_program_pads (parse, pads_to_add, pads_to_remove);
}
static void
mpegts_parse_apply_pmt (MpegTSParse * parse,
guint16 pmt_pid, GObject * pmt_info)
{
MpegTSParseProgram *program;
gint program_number;
guint pcr_pid;
guint pid;
guint stream_type;
GValueArray *old_streams;
GValueArray *new_streams;
GValue *value;
GObject *stream;
gint i;
g_object_get (pmt_info, "program_number", &program_number,
"pcr-pid", &pcr_pid, "stream-info", &new_streams, NULL);
GST_OBJECT_LOCK (parse);
program = mpegts_parse_get_program (parse, program_number);
if (program) {
if (program->pmt_info) {
/* deactivate old pmt */
g_object_get (program->pmt_info, "stream-info", &old_streams, NULL);
for (i = 0; i < old_streams->n_values; ++i) {
value = g_value_array_get_nth (old_streams, i);
stream = g_value_get_object (value);
g_object_get (stream, "pid", &pid, "stream-type", &stream_type, NULL);
mpegts_parse_program_remove_stream (parse, program, (guint16) pid);
}
g_value_array_free (old_streams);
g_object_unref (program->pmt_info);
}
} else {
/* no PAT?? */
g_hash_table_insert (parse->psi_pids,
GINT_TO_POINTER ((gint) pmt_pid), GINT_TO_POINTER (1));
program = mpegts_parse_add_program (parse, program_number, pid);
}
/* activate new pmt */
program->pmt_info = pmt_info;
program->pmt_pid = pmt_pid;
mpegts_parse_program_add_stream (parse, program, (guint16) pcr_pid, -1);
for (i = 0; i < new_streams->n_values; ++i) {
value = g_value_array_get_nth (new_streams, i);
stream = g_value_get_object (value);
g_object_get (stream, "pid", &pid, "stream-type", &stream_type, NULL);
mpegts_parse_program_add_stream (parse, program, (guint16) pid,
(guint8) stream_type);
}
GST_OBJECT_UNLOCK (parse);
g_value_array_free (new_streams);
g_signal_emit (parse, signals[SIGNAL_PMT], 0, program_number, pmt_info);
}
static gboolean
mpegts_parse_handle_psi (MpegTSParse * parse, MpegTSPacketizerSection * section)
{
gboolean res = TRUE;
switch (section->table_id) {
case 0x00:
{
/* PAT */
GValueArray *pat_info;
pat_info = mpegts_packetizer_parse_pat (parse->packetizer, section);
if (pat_info)
mpegts_parse_apply_pat (parse, pat_info);
else
res = FALSE;
break;
}
case 0x02:
{
/* PMT */
GObject *pmt_info;
pmt_info = mpegts_packetizer_parse_pmt (parse->packetizer, section);
if (pmt_info)
mpegts_parse_apply_pmt (parse, section->pid, pmt_info);
else
res = FALSE;
break;
}
default:
break;
}
return res;
}
static gboolean
mpegts_parse_sink_event (GstPad * pad, GstEvent * event)
{
gboolean res;
MpegTSParse *parse =
GST_MPEGTS_PARSE (gst_object_get_parent (GST_OBJECT (pad)));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
mpegts_packetizer_clear (parse->packetizer);
res = gst_pad_event_default (pad, event);
break;
default:
res = gst_pad_event_default (pad, event);
}
gst_object_unref (parse);
return res;
}
static GstFlowReturn
mpegts_parse_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn res = GST_FLOW_OK;
MpegTSParse *parse;
gboolean parsed;
MpegTSPacketizer *packetizer;
MpegTSPacketizerPacket packet;
parse = GST_MPEGTS_PARSE (gst_object_get_parent (GST_OBJECT (pad)));
packetizer = parse->packetizer;
mpegts_packetizer_push (parse->packetizer, buf);
while (mpegts_packetizer_has_packets (parse->packetizer) &&
!GST_FLOW_IS_FATAL (res)) {
/* get the next packet */
parsed = mpegts_packetizer_next_packet (packetizer, &packet);
if (!parsed)
/* bad header, skip the packet */
goto next;
/* parse PSI data */
if (packet.payload != NULL && mpegts_parse_is_psi_pid (parse, packet.pid)) {
MpegTSPacketizerSection section;
parsed = mpegts_packetizer_push_section (packetizer, &packet, &section);
if (!parsed)
/* bad section data */
goto next;
if (section.complete) {
/* section complete */
parsed = mpegts_parse_handle_psi (parse, &section);
gst_buffer_unref (section.buffer);
if (!parsed)
/* bad PSI table */
goto next;
}
}
/* push the packet downstream */
res = mpegts_parse_push (parse, &packet);
next:
mpegts_packetizer_clear_packet (parse->packetizer, &packet);
}
gst_object_unref (parse);
return res;
}
static GstStateChangeReturn
mpegts_parse_change_state (GstElement * element, GstStateChange transition)
{
MpegTSParse *parse;
GstStateChangeReturn ret;
parse = GST_MPEGTS_PARSE (element);
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
mpegts_parse_reset (parse);
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (mpegts_parse_debug, "mpegtsparse", 0,
"MPEG transport stream parser");
mpegts_packetizer_init_debug ();
return gst_element_register (plugin, "mpegtsparse",
GST_RANK_NONE, GST_TYPE_MPEGTS_PARSE);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mpegtsparse",
"MPEG-2 transport stream parser",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)