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gstreamer/sys/dvb/parsechannels.c
Reynaldo H. Verdejo Pinochet 17181bfe16 dvbbasebin: fix parsing of freqs in some ZAP files 
Change avoids attempting to convert to kHz if unneeded.

There are quite some ZAP format variants out there. Among
their subtle little differences, some store transponder
frequencies in Mhz and others in kHz. The latter been the
most common variant.
2014-08-13 13:10:04 -04:00

460 lines
16 KiB
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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;
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"
};
int i, parsedchannels = 0;
GHashTable *res;
GError *err = NULL;
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) {
if (line[0] != '#') {
int numfields;
gboolean parsed = FALSE;
GHashTable *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);
if (numfields == 8) {
/* satellite */
int j;
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])));
}
parsed = TRUE;
} else if (numfields == 13) {
/* terrestrial */
int j;
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]));
parsed = TRUE;
} else if (numfields == 9) {
/* cable */
int j;
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]));
parsed = TRUE;
} else if (numfields == 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]));
parsed = TRUE;
}
if (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++;
}
g_strfreev (fields);
}
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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