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gstreamer/sys/dvb/parsechannels.c
Reynaldo H. Verdejo Pinochet 0ac769194f dvb: simplify ZAP file format parser 
Simplify state handing, drop unneeded local vars, etc.
2015-10-09 17:53:52 -07:00

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/*
* parsechannels.c -
* Copyright (C) 2008 Zaheer Abbas Merali
*
* Authors:
* Zaheer Abbas Merali <zaheerabbas at merali dot 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 <glib.h>
#include <glib-object.h>
#include <stdlib.h>
#include <string.h>
#include <gst/gst.h>
#include <gst/gst-i18n-plugin.h>
#include "parsechannels.h"
#include <linux/dvb/frontend.h>
GST_DEBUG_CATEGORY_EXTERN (dvb_base_bin_debug);
#define GST_CAT_DEFAULT dvb_base_bin_debug
/* TODO:
* Store the channels hash table around instead of constantly parsing it
* Detect when the file changed on disk
*/
/* this will do zap style channels.conf only for the moment */
static GHashTable *
parse_channels_conf_from_file (GstElement * dvbbasebin, const gchar * filename,
GError ** error)
{
gchar *contents;
gchar **lines;
gchar *line;
gchar **fields;
int i, parsedchannels = 0;
GHashTable *res;
GError *err = NULL;
const gchar *terrestrial[] = { "inversion", "bandwidth",
"code-rate-hp", "code-rate-lp", "modulation", "transmission-mode",
"guard", "hierarchy"
};
const gchar *satellite[] = { "polarity", "diseqc-source",
"symbol-rate"
};
const gchar *cable[] = { "inversion", "symbol-rate", "code-rate-hp",
"modulation"
};
GST_INFO_OBJECT (dvbbasebin, "parsing '%s'", filename);
if (!g_file_get_contents (filename, &contents, NULL, &err))
goto open_fail;
lines = g_strsplit (contents, "\n", 0);
res = g_hash_table_new (g_str_hash, g_str_equal);
i = 0;
line = lines[0];
while (line != NULL) {
GHashTable *params;
int j, numfields;
if (line[0] == '#')
goto next_line;
params = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
fields = g_strsplit (line, ":", 0);
numfields = g_strv_length (fields);
switch (numfields) {
case 13: /* terrestrial */
g_hash_table_insert (params, g_strdup ("type"),
g_strdup ("terrestrial"));
for (j = 2; j <= 9; j++) {
g_hash_table_insert (params, g_strdup (terrestrial[j - 2]),
g_strdup (fields[j]));
}
g_hash_table_insert (params, g_strdup ("frequency"),
g_strdup (fields[1]));
break;
case 9: /* cable */
g_hash_table_insert (params, g_strdup ("type"), g_strdup ("cable"));
for (j = 2; j <= 5; j++) {
g_hash_table_insert (params, g_strdup (cable[j - 2]),
g_strdup (fields[j]));
}
g_hash_table_insert (params, g_strdup ("frequency"),
g_strdup (fields[1]));
break;
case 8: /* satellite */
g_hash_table_insert (params, g_strdup ("type"), g_strdup ("satellite"));
for (j = 2; j <= 4; j++) {
g_hash_table_insert (params, g_strdup (satellite[j - 2]),
g_strdup (fields[j]));
}
/**
* Some ZAP format variations store freqs in MHz
* but we internally use kHz for DVB-S/S2.
*/
if (strlen (fields[1]) < 6) {
g_hash_table_insert (params, g_strdup ("frequency"),
g_strdup_printf ("%d", atoi (fields[1]) * 1000));
} else {
g_hash_table_insert (params, g_strdup ("frequency"),
g_strdup_printf ("%d", atoi (fields[1])));
}
break;
case 6: /* atsc (vsb/qam) */
g_hash_table_insert (params, g_strdup ("type"), g_strdup ("atsc"));
g_hash_table_insert (params, g_strdup ("modulation"),
g_strdup (fields[2]));
g_hash_table_insert (params, g_strdup ("frequency"),
g_strdup (fields[1]));
break;
default:
goto not_parsed;
}
/* parsed */
g_hash_table_insert (params, g_strdup ("sid"),
g_strdup (fields[numfields - 1]));
g_hash_table_insert (res, g_strdup (fields[0]), params);
parsedchannels++;
not_parsed:
g_strfreev (fields);
next_line:
line = lines[++i];
}
g_strfreev (lines);
g_free (contents);
if (parsedchannels == 0)
goto no_channels;
return res;
open_fail:
if (err->code == G_FILE_ERROR_NOENT) {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_NOT_FOUND,
_("Couldn't find DVB channel configuration file"));
} else {
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_READ,
_("Couldn't load DVB channel configuration file: %s"), err->message);
}
g_clear_error (&err);
return NULL;
no_channels:
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
_("DVB channel configuration file doesn't contain any channels"));
g_hash_table_unref (res);
return NULL;
}
static gboolean
remove_channel_from_hash (gpointer key, gpointer value, gpointer user_data)
{
if (key)
g_free (key);
if (value)
g_hash_table_destroy ((GHashTable *) value);
return TRUE;
}
static void
destroy_channels_hash (GHashTable * channels)
{
g_hash_table_foreach_remove (channels, remove_channel_from_hash, NULL);
}
gboolean
set_properties_for_channel (GstElement * dvbbasebin,
const gchar * channel_name, GError ** error)
{
gboolean ret = FALSE;
GHashTable *channels, *params;
gchar *filename;
gchar *type;
const gchar *adapter;
filename = g_strdup (g_getenv ("GST_DVB_CHANNELS_CONF"));
if (filename == NULL) {
filename = g_build_filename (g_get_user_config_dir (),
"gstreamer-" GST_API_VERSION, "dvb-channels.conf", NULL);
}
channels = parse_channels_conf_from_file (dvbbasebin, filename, error);
g_free (filename);
if (!channels)
goto beach;
params = g_hash_table_lookup (channels, channel_name);
if (!params)
goto unknown_channel;
g_object_set (dvbbasebin, "program-numbers",
g_hash_table_lookup (params, "sid"), NULL);
/* check if it is terrestrial or satellite */
adapter = g_getenv ("GST_DVB_ADAPTER");
if (adapter)
g_object_set (dvbbasebin, "adapter", atoi (adapter), NULL);
g_object_set (dvbbasebin, "frequency",
atoi (g_hash_table_lookup (params, "frequency")), NULL);
type = g_hash_table_lookup (params, "type");
if (strcmp (type, "terrestrial") == 0) {
gchar *val;
g_object_set (dvbbasebin, "delsys", SYS_DVBT, NULL);
val = g_hash_table_lookup (params, "inversion");
if (strcmp (val, "INVERSION_OFF") == 0)
g_object_set (dvbbasebin, "inversion", 0, NULL);
else if (strcmp (val, "INVERSION_ON") == 0)
g_object_set (dvbbasebin, "inversion", 1, NULL);
else
g_object_set (dvbbasebin, "inversion", 2, NULL);
val = g_hash_table_lookup (params, "bandwidth");
if (strcmp (val, "BANDWIDTH_8_MHZ") == 0)
g_object_set (dvbbasebin, "bandwidth", 0, NULL);
else if (strcmp (val, "BANDWIDTH_7_MHZ") == 0)
g_object_set (dvbbasebin, "bandwidth", 1, NULL);
else if (strcmp (val, "BANDWIDTH_6_MHZ") == 0)
g_object_set (dvbbasebin, "bandwidth", 2, NULL);
else
g_object_set (dvbbasebin, "bandwidth", 3, NULL);
val = g_hash_table_lookup (params, "code-rate-hp");
if (strcmp (val, "FEC_NONE") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 0, NULL);
else if (strcmp (val, "FEC_1_2") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 1, NULL);
else if (strcmp (val, "FEC_2_3") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 2, NULL);
else if (strcmp (val, "FEC_3_4") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 3, NULL);
else if (strcmp (val, "FEC_4_5") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 4, NULL);
else if (strcmp (val, "FEC_5_6") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 5, NULL);
else if (strcmp (val, "FEC_6_7") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 6, NULL);
else if (strcmp (val, "FEC_7_8") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 7, NULL);
else if (strcmp (val, "FEC_8_9") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 8, NULL);
else
g_object_set (dvbbasebin, "code-rate-hp", 9, NULL);
val = g_hash_table_lookup (params, "code-rate-lp");
if (strcmp (val, "FEC_NONE") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 0, NULL);
else if (strcmp (val, "FEC_1_2") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 1, NULL);
else if (strcmp (val, "FEC_2_3") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 2, NULL);
else if (strcmp (val, "FEC_3_4") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 3, NULL);
else if (strcmp (val, "FEC_4_5") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 4, NULL);
else if (strcmp (val, "FEC_5_6") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 5, NULL);
else if (strcmp (val, "FEC_6_7") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 6, NULL);
else if (strcmp (val, "FEC_7_8") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 7, NULL);
else if (strcmp (val, "FEC_8_9") == 0)
g_object_set (dvbbasebin, "code-rate-lp", 8, NULL);
else
g_object_set (dvbbasebin, "code-rate-lp", 9, NULL);
val = g_hash_table_lookup (params, "modulation");
if (strcmp (val, "QPSK") == 0)
g_object_set (dvbbasebin, "modulation", 0, NULL);
else if (strcmp (val, "QAM_16") == 0)
g_object_set (dvbbasebin, "modulation", 1, NULL);
else if (strcmp (val, "QAM_32") == 0)
g_object_set (dvbbasebin, "modulation", 2, NULL);
else if (strcmp (val, "QAM_64") == 0)
g_object_set (dvbbasebin, "modulation", 3, NULL);
else if (strcmp (val, "QAM_128") == 0)
g_object_set (dvbbasebin, "modulation", 4, NULL);
else if (strcmp (val, "QAM_256") == 0)
g_object_set (dvbbasebin, "modulation", 5, NULL);
else
g_object_set (dvbbasebin, "modulation", 6, NULL);
val = g_hash_table_lookup (params, "transmission-mode");
if (strcmp (val, "TRANSMISSION_MODE_2K") == 0)
g_object_set (dvbbasebin, "trans-mode", 0, NULL);
else if (strcmp (val, "TRANSMISSION_MODE_8K") == 0)
g_object_set (dvbbasebin, "trans-mode", 1, NULL);
else
g_object_set (dvbbasebin, "trans-mode", 2, NULL);
val = g_hash_table_lookup (params, "guard");
if (strcmp (val, "GUARD_INTERVAL_1_32") == 0)
g_object_set (dvbbasebin, "guard", 0, NULL);
else if (strcmp (val, "GUARD_INTERVAL_1_16") == 0)
g_object_set (dvbbasebin, "guard", 1, NULL);
else if (strcmp (val, "GUARD_INTERVAL_1_8") == 0)
g_object_set (dvbbasebin, "guard", 2, NULL);
else if (strcmp (val, "GUARD_INTERVAL_1_4") == 0)
g_object_set (dvbbasebin, "guard", 3, NULL);
else
g_object_set (dvbbasebin, "guard", 4, NULL);
val = g_hash_table_lookup (params, "hierarchy");
if (strcmp (val, "HIERARCHY_NONE") == 0)
g_object_set (dvbbasebin, "hierarchy", 0, NULL);
else if (strcmp (val, "HIERARCHY_1") == 0)
g_object_set (dvbbasebin, "hierarchy", 1, NULL);
else if (strcmp (val, "HIERARCHY_2") == 0)
g_object_set (dvbbasebin, "hierarchy", 2, NULL);
else if (strcmp (val, "HIERARCHY_4") == 0)
g_object_set (dvbbasebin, "hierarchy", 3, NULL);
else
g_object_set (dvbbasebin, "hierarchy", 4, NULL);
ret = TRUE;
} else if (strcmp (type, "satellite") == 0) {
gchar *val;
ret = TRUE;
g_object_set (dvbbasebin, "delsys", SYS_DVBS, NULL);
val = g_hash_table_lookup (params, "polarity");
if (val)
g_object_set (dvbbasebin, "polarity", val, NULL);
else
ret = FALSE;
val = g_hash_table_lookup (params, "diseqc-source");
if (val)
g_object_set (dvbbasebin, "diseqc-source", atoi (val), NULL);
val = g_hash_table_lookup (params, "symbol-rate");
if (val)
g_object_set (dvbbasebin, "symbol-rate", atoi (val), NULL);
else
ret = FALSE;
} else if (strcmp (type, "cable") == 0) {
gchar *val;
g_object_set (dvbbasebin, "delsys", SYS_DVBC_ANNEX_A, NULL);
ret = TRUE;
val = g_hash_table_lookup (params, "symbol-rate");
if (val)
g_object_set (dvbbasebin, "symbol-rate", atoi (val) / 1000, NULL);
val = g_hash_table_lookup (params, "modulation");
if (strcmp (val, "QPSK") == 0)
g_object_set (dvbbasebin, "modulation", 0, NULL);
else if (strcmp (val, "QAM_16") == 0)
g_object_set (dvbbasebin, "modulation", 1, NULL);
else if (strcmp (val, "QAM_32") == 0)
g_object_set (dvbbasebin, "modulation", 2, NULL);
else if (strcmp (val, "QAM_64") == 0)
g_object_set (dvbbasebin, "modulation", 3, NULL);
else if (strcmp (val, "QAM_128") == 0)
g_object_set (dvbbasebin, "modulation", 4, NULL);
else if (strcmp (val, "QAM_256") == 0)
g_object_set (dvbbasebin, "modulation", 5, NULL);
else
g_object_set (dvbbasebin, "modulation", 6, NULL);
val = g_hash_table_lookup (params, "code-rate-hp");
if (strcmp (val, "FEC_NONE") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 0, NULL);
else if (strcmp (val, "FEC_1_2") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 1, NULL);
else if (strcmp (val, "FEC_2_3") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 2, NULL);
else if (strcmp (val, "FEC_3_4") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 3, NULL);
else if (strcmp (val, "FEC_4_5") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 4, NULL);
else if (strcmp (val, "FEC_5_6") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 5, NULL);
else if (strcmp (val, "FEC_6_7") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 6, NULL);
else if (strcmp (val, "FEC_7_8") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 7, NULL);
else if (strcmp (val, "FEC_8_9") == 0)
g_object_set (dvbbasebin, "code-rate-hp", 8, NULL);
else
g_object_set (dvbbasebin, "code-rate-hp", 9, NULL);
val = g_hash_table_lookup (params, "inversion");
if (strcmp (val, "INVERSION_OFF") == 0)
g_object_set (dvbbasebin, "inversion", 0, NULL);
else if (strcmp (val, "INVERSION_ON") == 0)
g_object_set (dvbbasebin, "inversion", 1, NULL);
else
g_object_set (dvbbasebin, "inversion", 2, NULL);
} else if (strcmp (type, "atsc") == 0) {
gchar *val;
ret = TRUE;
g_object_set (dvbbasebin, "delsys", SYS_ATSC, NULL);
val = g_hash_table_lookup (params, "modulation");
if (strcmp (val, "QAM_64") == 0)
g_object_set (dvbbasebin, "modulation", 3, NULL);
else if (strcmp (val, "QAM_256") == 0)
g_object_set (dvbbasebin, "modulation", 5, NULL);
else if (strcmp (val, "8VSB") == 0)
g_object_set (dvbbasebin, "modulation", 7, NULL);
else if (strcmp (val, "16VSB") == 0)
g_object_set (dvbbasebin, "modulation", 8, NULL);
else
ret = FALSE;
}
destroy_channels_hash (channels);
beach:
return ret;
unknown_channel:
{
/* FIXME: is channel name guaranteed to be ASCII or UTF-8? */
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_NOT_FOUND,
_("Couldn't find details for DVB channel %s"), channel_name);
destroy_channels_hash (channels);
return FALSE;
}
}
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