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gstreamer/sys/dvb/dvbbasebin.c
Vincent Penquerc'h 8250a7d531 dvbbasebin: fix test for proper use count balancing 
usecount is unsigned, so too many "unuse" will wrap the counter
around and the >= 0 check will always be fine.

It would be much simpler to just make the counter signed, but
moving the checks where the decrements happen allow a mistake
to be detected earlier, and thus easier to debug.

Coverity 1139791
2014-04-21 09:34:46 +01:00

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/*
* dvbbasebin.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <gst/mpegts/mpegts.h>
#include "dvbbasebin.h"
#include "parsechannels.h"
GST_DEBUG_CATEGORY (dvb_base_bin_debug);
#define GST_CAT_DEFAULT dvb_base_bin_debug
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_%u", GST_PAD_SRC,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/mpegts, " "systemstream = (boolean) true ")
);
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
PROP_ADAPTER,
PROP_FRONTEND,
PROP_DISEQC_SRC,
PROP_FREQUENCY,
PROP_POLARITY,
PROP_SYMBOL_RATE,
PROP_BANDWIDTH,
PROP_CODE_RATE_HP,
PROP_CODE_RATE_LP,
PROP_GUARD,
PROP_MODULATION,
PROP_TRANS_MODE,
PROP_HIERARCHY,
PROP_INVERSION,
PROP_PROGRAM_NUMBERS,
PROP_STATS_REPORTING_INTERVAL,
PROP_DELSYS,
PROP_PILOT,
PROP_ROLLOFF,
PROP_STREAM_ID,
PROP_BANDWIDTH_HZ
/* FILL ME */
};
typedef struct
{
guint16 pid;
guint usecount;
} DvbBaseBinStream;
typedef struct
{
gint program_number;
guint16 pmt_pid;
guint16 pcr_pid;
GstMpegTsSection *section;
GstMpegTsSection *old_section;
const GstMpegTsPMT *pmt;
const GstMpegTsPMT *old_pmt;
gboolean selected;
gboolean pmt_active;
gboolean active;
GstPad *ghost;
} DvbBaseBinProgram;
static void dvb_base_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void dvb_base_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void dvb_base_bin_dispose (GObject * object);
static void dvb_base_bin_finalize (GObject * object);
static void dvb_base_bin_task (DvbBaseBin * basebin);
static GstStateChangeReturn dvb_base_bin_change_state (GstElement * element,
GstStateChange transition);
static void dvb_base_bin_handle_message (GstBin * bin, GstMessage * message);
static void dvb_base_bin_pat_info_cb (DvbBaseBin * dvbbasebin,
GstMpegTsSection * pat);
static void dvb_base_bin_pmt_info_cb (DvbBaseBin * dvbbasebin,
GstMpegTsSection * pmt);
static GstPad *dvb_base_bin_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void dvb_base_bin_release_pad (GstElement * element, GstPad * pad);
static void dvb_base_bin_rebuild_filter (DvbBaseBin * dvbbasebin);
static void
dvb_base_bin_deactivate_program (DvbBaseBin * dvbbasebin,
DvbBaseBinProgram * program);
static void dvb_base_bin_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static void dvb_base_bin_program_destroy (gpointer data);
#define dvb_base_bin_parent_class parent_class
G_DEFINE_TYPE_EXTENDED (DvbBaseBin, dvb_base_bin, GST_TYPE_BIN,
0,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER,
dvb_base_bin_uri_handler_init));
static void
dvb_base_bin_ref_stream (DvbBaseBinStream * stream)
{
g_return_if_fail (stream != NULL);
stream->usecount++;
}
static void
dvb_base_bin_unref_stream (DvbBaseBinStream * stream)
{
g_return_if_fail (stream != NULL);
g_return_if_fail (stream->usecount > 0);
stream->usecount--;
}
static DvbBaseBinStream *
dvb_base_bin_add_stream (DvbBaseBin * dvbbasebin, guint16 pid)
{
DvbBaseBinStream *stream;
stream = g_new0 (DvbBaseBinStream, 1);
stream->pid = pid;
stream->usecount = 0;
g_hash_table_insert (dvbbasebin->streams,
GINT_TO_POINTER ((gint) pid), stream);
return stream;
}
static DvbBaseBinStream *
dvb_base_bin_get_stream (DvbBaseBin * dvbbasebin, guint16 pid)
{
return (DvbBaseBinStream *) g_hash_table_lookup (dvbbasebin->streams,
GINT_TO_POINTER ((gint) pid));
}
static DvbBaseBinProgram *
dvb_base_bin_add_program (DvbBaseBin * dvbbasebin, gint program_number)
{
DvbBaseBinProgram *program;
program = g_new0 (DvbBaseBinProgram, 1);
program->program_number = program_number;
program->selected = FALSE;
program->active = FALSE;
program->pmt_pid = G_MAXUINT16;
program->pcr_pid = G_MAXUINT16;
program->pmt = NULL;
program->old_pmt = NULL;
g_hash_table_insert (dvbbasebin->programs,
GINT_TO_POINTER (program_number), program);
return program;
}
static DvbBaseBinProgram *
dvb_base_bin_get_program (DvbBaseBin * dvbbasebin, gint program_number)
{
return (DvbBaseBinProgram *) g_hash_table_lookup (dvbbasebin->programs,
GINT_TO_POINTER (program_number));
}
/*
static guint signals [LAST_SIGNAL] = { 0 };
*/
static void
dvb_base_bin_class_init (DvbBaseBinClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBinClass *bin_class;
GstElementFactory *dvbsrc_factory;
GObjectClass *dvbsrc_class;
typedef struct
{
guint prop_id;
const gchar *prop_name;
} ProxyedProperty;
ProxyedProperty *walk;
ProxyedProperty proxyed_properties[] = {
{PROP_ADAPTER, "adapter"},
{PROP_FRONTEND, "frontend"},
{PROP_DISEQC_SRC, "diseqc-source"},
{PROP_FREQUENCY, "frequency"},
{PROP_POLARITY, "polarity"},
{PROP_SYMBOL_RATE, "symbol-rate"},
{PROP_BANDWIDTH, "bandwidth"},
{PROP_CODE_RATE_HP, "code-rate-hp"},
{PROP_CODE_RATE_LP, "code-rate-lp"},
{PROP_GUARD, "guard"},
{PROP_MODULATION, "modulation"},
{PROP_TRANS_MODE, "trans-mode"},
{PROP_HIERARCHY, "hierarchy"},
{PROP_INVERSION, "inversion"},
{PROP_STATS_REPORTING_INTERVAL, "stats-reporting-interval"},
{PROP_DELSYS, "delsys"},
{PROP_PILOT, "pilot"},
{PROP_ROLLOFF, "rolloff"},
{PROP_STREAM_ID, "stream-id"},
{PROP_BANDWIDTH_HZ, "bandwidth-hz"},
{0, NULL}
};
bin_class = GST_BIN_CLASS (klass);
bin_class->handle_message = dvb_base_bin_handle_message;
element_class = GST_ELEMENT_CLASS (klass);
element_class->change_state = dvb_base_bin_change_state;
element_class->request_new_pad = dvb_base_bin_request_new_pad;
element_class->release_pad = dvb_base_bin_release_pad;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&program_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_set_static_metadata (element_class, "DVB bin",
"Source/Bin/Video",
"Access descramble and split DVB streams",
"Alessandro Decina <alessandro@nnva.org>");
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = dvb_base_bin_set_property;
gobject_class->get_property = dvb_base_bin_get_property;
gobject_class->dispose = dvb_base_bin_dispose;
gobject_class->finalize = dvb_base_bin_finalize;
/* install dvbsrc properties */
dvbsrc_factory = gst_element_factory_find ("dvbsrc");
dvbsrc_class =
g_type_class_ref (gst_element_factory_get_element_type (dvbsrc_factory));
walk = proxyed_properties;
while (walk->prop_name != NULL) {
GParamSpec *pspec;
GParamSpec *our_pspec;
pspec = g_object_class_find_property (dvbsrc_class, walk->prop_name);
if (pspec != NULL) {
GType param_type = G_PARAM_SPEC_TYPE (pspec);
if (param_type == G_TYPE_PARAM_INT) {
GParamSpecInt *src_pspec = G_PARAM_SPEC_INT (pspec);
our_pspec = g_param_spec_int (g_param_spec_get_name (pspec),
g_param_spec_get_nick (pspec), g_param_spec_get_blurb (pspec),
src_pspec->minimum, src_pspec->maximum, src_pspec->default_value,
pspec->flags);
} else if (param_type == G_TYPE_PARAM_UINT) {
GParamSpecUInt *src_pspec = G_PARAM_SPEC_UINT (pspec);
our_pspec = g_param_spec_uint (g_param_spec_get_name (pspec),
g_param_spec_get_nick (pspec), g_param_spec_get_blurb (pspec),
src_pspec->minimum, src_pspec->maximum, src_pspec->default_value,
pspec->flags);
} else if (param_type == G_TYPE_PARAM_STRING) {
GParamSpecString *src_pspec = G_PARAM_SPEC_STRING (pspec);
our_pspec = g_param_spec_string (g_param_spec_get_name (pspec),
g_param_spec_get_nick (pspec), g_param_spec_get_blurb (pspec),
src_pspec->default_value, pspec->flags);
} else if (param_type == G_TYPE_PARAM_ENUM) {
GParamSpecEnum *src_pspec = G_PARAM_SPEC_ENUM (pspec);
our_pspec = g_param_spec_enum (g_param_spec_get_name (pspec),
g_param_spec_get_nick (pspec), g_param_spec_get_blurb (pspec),
pspec->value_type, src_pspec->default_value, pspec->flags);
} else {
GST_ERROR ("Unsupported property type %s for property %s",
g_type_name (param_type), g_param_spec_get_name (pspec));
++walk;
continue;
}
g_object_class_install_property (gobject_class, walk->prop_id, our_pspec);
} else {
g_warning ("dvbsrc has no property named %s", walk->prop_name);
}
++walk;
}
g_type_class_unref (dvbsrc_class);
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));
}
static void
dvb_base_bin_reset (DvbBaseBin * dvbbasebin)
{
if (dvbbasebin->hwcam) {
cam_device_close (dvbbasebin->hwcam);
cam_device_free (dvbbasebin->hwcam);
dvbbasebin->hwcam = NULL;
}
dvbbasebin->trycam = TRUE;
}
static gint16 initial_pids[] = { 0, 1, 0x10, 0x11, 0x12, 0x14, -1 };
static void
dvb_base_bin_init (DvbBaseBin * dvbbasebin)
{
DvbBaseBinStream *stream;
GstPad *ghost, *pad;
int i;
dvbbasebin->dvbsrc = gst_element_factory_make ("dvbsrc", NULL);
dvbbasebin->buffer_queue = gst_element_factory_make ("queue", NULL);
dvbbasebin->tsparse = gst_element_factory_make ("tsparse", NULL);
g_object_set (dvbbasebin->buffer_queue, "max-size-buffers", 0,
"max-size-bytes", 0, "max-size-time", 0, NULL);
gst_bin_add_many (GST_BIN (dvbbasebin), dvbbasebin->dvbsrc,
dvbbasebin->buffer_queue, dvbbasebin->tsparse, NULL);
gst_element_link_many (dvbbasebin->dvbsrc,
dvbbasebin->buffer_queue, dvbbasebin->tsparse, NULL);
/* Expose tsparse source pad */
pad = gst_element_get_static_pad (dvbbasebin->tsparse, "src");
ghost = gst_ghost_pad_new ("src", pad);
gst_element_add_pad (GST_ELEMENT (dvbbasebin), ghost);
dvbbasebin->programs = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, dvb_base_bin_program_destroy);
dvbbasebin->streams = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, g_free);
dvbbasebin->pmtlist = NULL;
dvbbasebin->pmtlist_changed = FALSE;
dvbbasebin->disposed = FALSE;
dvb_base_bin_reset (dvbbasebin);
/* add PAT, CAT, NIT, SDT, EIT, TDT to pids filter for dvbsrc */
i = 0;
while (initial_pids[i] >= 0) {
stream = dvb_base_bin_add_stream (dvbbasebin, (guint16) initial_pids[i]);
dvb_base_bin_ref_stream (stream);
i++;
}
dvb_base_bin_rebuild_filter (dvbbasebin);
g_rec_mutex_init (&dvbbasebin->lock);
dvbbasebin->task =
gst_task_new ((GstTaskFunction) dvb_base_bin_task, dvbbasebin, NULL);
gst_task_set_lock (dvbbasebin->task, &dvbbasebin->lock);
dvbbasebin->poll = gst_poll_new_timer ();
}
static void
dvb_base_bin_dispose (GObject * object)
{
DvbBaseBin *dvbbasebin = GST_DVB_BASE_BIN (object);
if (!dvbbasebin->disposed) {
/* remove mpegtsparse BEFORE dvbsrc, since the mpegtsparse::pad-removed
* signal handler uses dvbsrc */
dvb_base_bin_reset (dvbbasebin);
gst_bin_remove (GST_BIN (dvbbasebin), dvbbasebin->tsparse);
gst_bin_remove (GST_BIN (dvbbasebin), dvbbasebin->dvbsrc);
gst_bin_remove (GST_BIN (dvbbasebin), dvbbasebin->buffer_queue);
dvbbasebin->disposed = TRUE;
}
if (G_OBJECT_CLASS (parent_class)->dispose)
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
dvb_base_bin_finalize (GObject * object)
{
DvbBaseBin *dvbbasebin = GST_DVB_BASE_BIN (object);
g_hash_table_destroy (dvbbasebin->streams);
g_hash_table_destroy (dvbbasebin->programs);
g_list_free (dvbbasebin->pmtlist);
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
dvb_base_bin_set_program_numbers (DvbBaseBin * dvbbasebin, const gchar * pn)
{
gchar **strv, **walk;
DvbBaseBinProgram *program;
/* Split up and update programs */
strv = g_strsplit (pn, ":", 0);
for (walk = strv; *walk; walk++) {
gint program_number = strtol (*walk, NULL, 0);
program = dvb_base_bin_get_program (dvbbasebin, program_number);
if (program == NULL) {
program = dvb_base_bin_add_program (dvbbasebin, program_number);
program->selected = TRUE;
}
}
g_strfreev (strv);
/* FIXME : Deactivate programs no longer selected */
if (dvbbasebin->program_numbers)
g_free (dvbbasebin->program_numbers);
dvbbasebin->program_numbers = g_strdup (pn);
if (0)
dvb_base_bin_deactivate_program (dvbbasebin, NULL);
}
static void
dvb_base_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
DvbBaseBin *dvbbasebin = GST_DVB_BASE_BIN (object);
switch (prop_id) {
case PROP_ADAPTER:
case PROP_DISEQC_SRC:
case PROP_FRONTEND:
case PROP_FREQUENCY:
case PROP_POLARITY:
case PROP_SYMBOL_RATE:
case PROP_BANDWIDTH:
case PROP_CODE_RATE_HP:
case PROP_CODE_RATE_LP:
case PROP_GUARD:
case PROP_MODULATION:
case PROP_TRANS_MODE:
case PROP_HIERARCHY:
case PROP_INVERSION:
case PROP_STATS_REPORTING_INTERVAL:
case PROP_DELSYS:
case PROP_PILOT:
case PROP_ROLLOFF:
case PROP_STREAM_ID:
case PROP_BANDWIDTH_HZ:
/* FIXME: check if we can tune (state < PLAYING || program-numbers == "") */
g_object_set_property (G_OBJECT (dvbbasebin->dvbsrc), pspec->name, value);
break;
case PROP_PROGRAM_NUMBERS:
dvb_base_bin_set_program_numbers (dvbbasebin, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
dvb_base_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
DvbBaseBin *dvbbasebin = GST_DVB_BASE_BIN (object);
switch (prop_id) {
case PROP_ADAPTER:
case PROP_FRONTEND:
case PROP_DISEQC_SRC:
case PROP_FREQUENCY:
case PROP_POLARITY:
case PROP_SYMBOL_RATE:
case PROP_BANDWIDTH:
case PROP_CODE_RATE_HP:
case PROP_CODE_RATE_LP:
case PROP_GUARD:
case PROP_MODULATION:
case PROP_TRANS_MODE:
case PROP_HIERARCHY:
case PROP_INVERSION:
case PROP_STATS_REPORTING_INTERVAL:
case PROP_DELSYS:
case PROP_PILOT:
case PROP_ROLLOFF:
case PROP_STREAM_ID:
case PROP_BANDWIDTH_HZ:
g_object_get_property (G_OBJECT (dvbbasebin->dvbsrc), pspec->name, value);
break;
case PROP_PROGRAM_NUMBERS:
g_value_set_string (value, dvbbasebin->program_numbers);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static GstPad *
dvb_base_bin_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstPad *pad;
GstPad *ghost;
gchar *pad_name;
GST_DEBUG ("New pad requested %s", name);
if (name == NULL)
name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ);
pad = gst_element_get_request_pad (GST_DVB_BASE_BIN (element)->tsparse, name);
if (pad == NULL)
return NULL;
pad_name = gst_pad_get_name (pad);
ghost = gst_ghost_pad_new (pad_name, pad);
g_free (pad_name);
gst_element_add_pad (element, ghost);
return ghost;
}
static void
dvb_base_bin_release_pad (GstElement * element, GstPad * pad)
{
GstGhostPad *ghost;
GstPad *target;
g_return_if_fail (GST_IS_DVB_BASE_BIN (element));
ghost = GST_GHOST_PAD (pad);
target = gst_ghost_pad_get_target (ghost);
gst_element_release_request_pad (GST_ELEMENT (GST_DVB_BASE_BIN
(element)->tsparse), target);
gst_object_unref (target);
gst_element_remove_pad (element, pad);
}
static void
dvb_base_bin_reset_pmtlist (DvbBaseBin * dvbbasebin)
{
CamConditionalAccessPmtFlag flag;
GList *walk;
GstMpegTsPMT *pmt;
walk = dvbbasebin->pmtlist;
while (walk) {
if (walk->prev == NULL) {
if (walk->next == NULL)
flag = CAM_CONDITIONAL_ACCESS_PMT_FLAG_ONLY;
else
flag = CAM_CONDITIONAL_ACCESS_PMT_FLAG_FIRST;
} else {
if (walk->next == NULL)
flag = CAM_CONDITIONAL_ACCESS_PMT_FLAG_LAST;
else
flag = CAM_CONDITIONAL_ACCESS_PMT_FLAG_MORE;
}
pmt = (GstMpegTsPMT *) walk->data;
cam_device_set_pmt (dvbbasebin->hwcam, pmt, flag);
walk = walk->next;
}
dvbbasebin->pmtlist_changed = FALSE;
}
static void
dvb_base_bin_init_cam (DvbBaseBin * dvbbasebin)
{
gint adapter;
gchar *ca_file;
g_object_get (dvbbasebin->dvbsrc, "adapter", &adapter, NULL);
/* TODO: handle multiple cams */
ca_file = g_strdup_printf ("/dev/dvb/adapter%d/ca0", adapter);
if (g_file_test (ca_file, G_FILE_TEST_EXISTS)) {
dvbbasebin->hwcam = cam_device_new ();
/* device_open() can block up to 5s ! */
if (!cam_device_open (dvbbasebin->hwcam, ca_file)) {
GST_ERROR_OBJECT (dvbbasebin, "could not open %s", ca_file);
cam_device_free (dvbbasebin->hwcam);
dvbbasebin->hwcam = NULL;
}
}
dvbbasebin->trycam = FALSE;
g_free (ca_file);
}
static GstStateChangeReturn
dvb_base_bin_change_state (GstElement * element, GstStateChange transition)
{
DvbBaseBin *dvbbasebin;
GstStateChangeReturn ret;
dvbbasebin = GST_DVB_BASE_BIN (element);
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_poll_set_flushing (dvbbasebin->poll, FALSE);
g_rec_mutex_lock (&dvbbasebin->lock);
gst_task_start (dvbbasebin->task);
g_rec_mutex_unlock (&dvbbasebin->lock);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_poll_set_flushing (dvbbasebin->poll, TRUE);
g_rec_mutex_lock (&dvbbasebin->lock);
gst_task_stop (dvbbasebin->task);
g_rec_mutex_unlock (&dvbbasebin->lock);
dvb_base_bin_reset (dvbbasebin);
break;
default:
break;
}
return ret;
}
static void
foreach_stream_build_filter (gpointer key, gpointer value, gpointer user_data)
{
DvbBaseBin *dvbbasebin = GST_DVB_BASE_BIN (user_data);
DvbBaseBinStream *stream = (DvbBaseBinStream *) value;
gchar *tmp, *pid;
GST_DEBUG ("stream %d usecount %d", stream->pid, stream->usecount);
if (stream->usecount > 0) {
/* TODO: use g_strjoinv FTW */
tmp = dvbbasebin->filter;
pid = g_strdup_printf ("%d", stream->pid);
dvbbasebin->filter = g_strjoin (":", pid, dvbbasebin->filter, NULL);
g_free (pid);
g_free (tmp);
}
}
static void
dvb_base_bin_rebuild_filter (DvbBaseBin * dvbbasebin)
{
g_hash_table_foreach (dvbbasebin->streams,
foreach_stream_build_filter, dvbbasebin);
if (dvbbasebin->filter == NULL)
/* fix dvbsrc to handle NULL filter */
dvbbasebin->filter = g_strdup ("");
GST_INFO_OBJECT (dvbbasebin, "rebuilt filter %s", dvbbasebin->filter);
/* FIXME: find a way to not add unwanted pids controlled by app */
g_object_set (dvbbasebin->dvbsrc, "pids", dvbbasebin->filter, NULL);
g_free (dvbbasebin->filter);
dvbbasebin->filter = NULL;
}
static void
dvb_base_bin_remove_pmt_streams (DvbBaseBin * dvbbasebin,
const GstMpegTsPMT * pmt)
{
gint i;
DvbBaseBinStream *stream;
for (i = 0; i < pmt->streams->len; i++) {
GstMpegTsPMTStream *pmtstream = g_ptr_array_index (pmt->streams, i);
stream = dvb_base_bin_get_stream (dvbbasebin, pmtstream->pid);
if (stream == NULL) {
GST_WARNING_OBJECT (dvbbasebin, "removing unknown stream %d ??",
pmtstream->pid);
continue;
}
dvb_base_bin_unref_stream (stream);
}
}
static void
dvb_base_bin_add_pmt_streams (DvbBaseBin * dvbbasebin, const GstMpegTsPMT * pmt)
{
DvbBaseBinStream *stream;
gint i;
for (i = 0; i < pmt->streams->len; i++) {
GstMpegTsPMTStream *pmtstream = g_ptr_array_index (pmt->streams, i);
GST_DEBUG ("filtering stream %d stream_type %d", pmtstream->pid,
pmtstream->stream_type);
stream = dvb_base_bin_get_stream (dvbbasebin, pmtstream->pid);
if (stream == NULL)
stream = dvb_base_bin_add_stream (dvbbasebin, pmtstream->pid);
dvb_base_bin_ref_stream (stream);
}
}
static void
dvb_base_bin_activate_program (DvbBaseBin * dvbbasebin,
DvbBaseBinProgram * program)
{
DvbBaseBinStream *stream;
if (program->old_pmt) {
dvb_base_bin_remove_pmt_streams (dvbbasebin, program->old_pmt);
dvbbasebin->pmtlist = g_list_remove (dvbbasebin->pmtlist, program->old_pmt);
}
/* activate the PMT and PCR streams. If the PCR stream is in the PMT its
* usecount will be incremented by 2 here and decremented by 2 when the
* program is deactivated */
if (!program->pmt_active) {
stream = dvb_base_bin_get_stream (dvbbasebin, program->pmt_pid);
if (stream == NULL)
stream = dvb_base_bin_add_stream (dvbbasebin, program->pmt_pid);
dvb_base_bin_ref_stream (stream);
program->pmt_active = TRUE;
}
if (program->pmt) {
guint16 old_pcr_pid;
old_pcr_pid = program->pcr_pid;
program->pcr_pid = program->pmt->pcr_pid;
if (old_pcr_pid != G_MAXUINT16 && old_pcr_pid != program->pcr_pid) {
dvb_base_bin_unref_stream (dvb_base_bin_get_stream (dvbbasebin,
old_pcr_pid));
}
stream = dvb_base_bin_get_stream (dvbbasebin, program->pcr_pid);
if (stream == NULL)
stream = dvb_base_bin_add_stream (dvbbasebin, program->pcr_pid);
dvb_base_bin_ref_stream (stream);
dvb_base_bin_add_pmt_streams (dvbbasebin, program->pmt);
dvbbasebin->pmtlist =
g_list_append (dvbbasebin->pmtlist, (gpointer) program->pmt);
dvbbasebin->pmtlist_changed = TRUE;
program->active = TRUE;
}
dvb_base_bin_rebuild_filter (dvbbasebin);
}
static void
dvb_base_bin_deactivate_program (DvbBaseBin * dvbbasebin,
DvbBaseBinProgram * program)
{
DvbBaseBinStream *stream;
stream = dvb_base_bin_get_stream (dvbbasebin, program->pmt_pid);
if (stream != NULL) {
dvb_base_bin_unref_stream (stream);
}
stream = dvb_base_bin_get_stream (dvbbasebin, program->pcr_pid);
if (stream != NULL) {
dvb_base_bin_unref_stream (stream);
}
if (program->pmt) {
dvb_base_bin_remove_pmt_streams (dvbbasebin, program->pmt);
dvbbasebin->pmtlist = g_list_remove (dvbbasebin->pmtlist, program->pmt);
dvbbasebin->pmtlist_changed = TRUE;
}
dvb_base_bin_rebuild_filter (dvbbasebin);
program->pmt_active = FALSE;
program->active = FALSE;
}
static void
dvb_base_bin_handle_message (GstBin * bin, GstMessage * message)
{
DvbBaseBin *dvbbasebin;
dvbbasebin = GST_DVB_BASE_BIN (bin);
/* note: message->src might be a GstPad, so use element cast w/o typecheck */
if (GST_ELEMENT_CAST (message->src) == GST_ELEMENT (dvbbasebin->tsparse)) {
GstMpegTsSection *section = gst_message_parse_mpegts_section (message);
if (section) {
switch (GST_MPEGTS_SECTION_TYPE (section)) {
case GST_MPEGTS_SECTION_PAT:
dvb_base_bin_pat_info_cb (dvbbasebin, section);
break;
case GST_MPEGTS_SECTION_PMT:
dvb_base_bin_pmt_info_cb (dvbbasebin, section);
break;
default:
break;
}
gst_mpegts_section_unref (section);
}
}
/* chain up */
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
}
static void
dvb_base_bin_pat_info_cb (DvbBaseBin * dvbbasebin, GstMpegTsSection * section)
{
GPtrArray *pat;
DvbBaseBinProgram *program;
DvbBaseBinStream *stream;
guint old_pmt_pid;
gint i;
gboolean rebuild_filter = FALSE;
if (!(pat = gst_mpegts_section_get_pat (section))) {
GST_WARNING_OBJECT (dvbbasebin, "got invalid PAT");
return;
}
for (i = 0; i < pat->len; i++) {
GstMpegTsPatProgram *patp = g_ptr_array_index (pat, i);
program = dvb_base_bin_get_program (dvbbasebin, patp->program_number);
if (program == NULL)
program = dvb_base_bin_add_program (dvbbasebin, patp->program_number);
old_pmt_pid = program->pmt_pid;
program->pmt_pid = patp->network_or_program_map_PID;
if (program->selected) {
/* PAT update */
if (old_pmt_pid != G_MAXUINT16 && old_pmt_pid != program->pmt_pid) {
dvb_base_bin_unref_stream (dvb_base_bin_get_stream (dvbbasebin,
old_pmt_pid));
}
stream = dvb_base_bin_get_stream (dvbbasebin, program->pmt_pid);
if (stream == NULL)
stream = dvb_base_bin_add_stream (dvbbasebin, program->pmt_pid);
dvb_base_bin_ref_stream (stream);
rebuild_filter = TRUE;
}
}
if (rebuild_filter)
dvb_base_bin_rebuild_filter (dvbbasebin);
}
static void
dvb_base_bin_pmt_info_cb (DvbBaseBin * dvbbasebin, GstMpegTsSection * section)
{
const GstMpegTsPMT *pmt;
DvbBaseBinProgram *program;
guint program_number;
pmt = gst_mpegts_section_get_pmt (section);
if (G_UNLIKELY (pmt == NULL)) {
GST_WARNING_OBJECT (dvbbasebin, "Received invalid PMT");
return;
}
program_number = section->subtable_extension;
program = dvb_base_bin_get_program (dvbbasebin, program_number);
if (program == NULL) {
GST_WARNING ("got PMT for program %d but program not in PAT",
program_number);
program = dvb_base_bin_add_program (dvbbasebin, program_number);
}
program->old_pmt = program->pmt;
program->old_section = program->section;
program->pmt = pmt;
program->section = gst_mpegts_section_ref (section);
/* activate the program if it's selected and either it's not active or its pmt
* changed */
if (program->selected && (!program->active || program->old_pmt != NULL))
dvb_base_bin_activate_program (dvbbasebin, program);
if (program->old_pmt) {
gst_mpegts_section_unref (program->old_section);
program->old_pmt = NULL;
}
}
static guint
dvb_base_bin_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
dvb_base_bin_uri_get_protocols (GType type)
{
static const gchar *protocols[] = { "dvb", NULL };
return protocols;
}
static gchar *
dvb_base_bin_uri_get_uri (GstURIHandler * handler)
{
return g_strdup ("dvb://");
}
static gboolean
dvb_base_bin_uri_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** error)
{
DvbBaseBin *dvbbasebin = GST_DVB_BASE_BIN (handler);
GError *err = NULL;
gchar *location;
location = gst_uri_get_location (uri);
if (location == NULL)
goto no_location;
if (!set_properties_for_channel (GST_ELEMENT (dvbbasebin), location, &err))
goto set_properties_failed;
/* FIXME: here is where we parse channels.conf */
g_free (location);
return TRUE;
/* ERRORS */
post_error_and_exit:
{
gst_element_message_full (GST_ELEMENT (dvbbasebin), GST_MESSAGE_ERROR,
err->domain, err->code, g_strdup (err->message), NULL, __FILE__,
GST_FUNCTION, __LINE__);
g_propagate_error (error, err);
return FALSE;
}
no_location:
{
g_set_error (&err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"No details to DVB URI");
goto post_error_and_exit;
}
set_properties_failed:
{
g_free (location);
goto post_error_and_exit;
}
}
static void
dvb_base_bin_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = dvb_base_bin_uri_get_type;
iface->get_protocols = dvb_base_bin_uri_get_protocols;
iface->get_uri = dvb_base_bin_uri_get_uri;
iface->set_uri = dvb_base_bin_uri_set_uri;
}
gboolean
gst_dvb_base_bin_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (dvb_base_bin_debug, "dvbbasebin", 0, "DVB bin");
cam_init ();
return gst_element_register (plugin, "dvbbasebin",
GST_RANK_NONE, GST_TYPE_DVB_BASE_BIN);
}
static void
dvb_base_bin_program_destroy (gpointer data)
{
DvbBaseBinProgram *program;
program = (DvbBaseBinProgram *) data;
if (program->pmt) {
program->pmt = NULL;
gst_mpegts_section_unref (program->section);
}
g_free (program);
}
static void
dvb_base_bin_task (DvbBaseBin * basebin)
{
gint pollres;
GST_DEBUG_OBJECT (basebin, "In task");
/* If we haven't tried to open the cam, try now */
if (G_UNLIKELY (basebin->trycam))
dvb_base_bin_init_cam (basebin);
/* poll with timeout */
pollres = gst_poll_wait (basebin->poll, GST_SECOND / 4);
if (G_UNLIKELY (pollres == -1)) {
gst_task_stop (basebin->task);
return;
}
if (basebin->hwcam) {
cam_device_poll (basebin->hwcam);
if (basebin->pmtlist_changed) {
if (cam_device_ready (basebin->hwcam)) {
GST_DEBUG_OBJECT (basebin, "pmt list changed");
dvb_base_bin_reset_pmtlist (basebin);
} else {
GST_DEBUG_OBJECT (basebin, "pmt list changed but CAM not ready");
}
}
}
}
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