DTV: add so-called "Clear" QAM

Use cqam:// as BDA already does.

modules/access/dtv/access.c

@@ -193,7 +193,7 @@ vlc_module_begin ()
     set_callbacks (Open, Close)
     add_shortcut ("dtv", "tv", "dvb", /* "radio", "dab",*/
                   "cable", "dvb-c", "satellite", "dvb-s", "dvb-s2",
-                  "terrestrial", "dvb-t", "atsc")
+                  "terrestrial", "dvb-t", "atsc", "cqam")
 
     /* All options starting with dvb- can be overriden in the MRL, so they
      * must all be "safe". Nevertheless, we do not mark as safe those that are
@@ -494,6 +494,8 @@ static const delsys_t *GuessSystem (const char *scheme, dvb_device_t *dev)
 
     if (!strcasecmp (scheme, "atsc"))
         return &atsc;
+    if (!strcasecmp (scheme, "cqam"))
+        return &cqam;
     if (!strcasecmp (scheme, "dvb-c"))
         return &dvbc;
     if (!strcasecmp (scheme, "dvb-s"))
@@ -592,6 +594,17 @@ static int atsc_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 
 const delsys_t atsc = { .setup = atsc_setup };
 
+static int cqam_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
+{
+    char *mod = var_InheritModulation (obj);
+
+    int ret = dvb_set_cqam (dev, freq, mod);
+    free (mod);
+    return ret;
+}
+
+const delsys_t cqam = { .setup = cqam_setup };
+
 
 /*** DVB-C ***/
 static int dvbc_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)

modules/access/dtv/dtv.h

@@ -22,7 +22,7 @@
 
 typedef struct delsys delsys_t;
 
-extern const delsys_t dvbc, dvbs, dvbs2, dvbt, atsc;
+extern const delsys_t dvbc, dvbs, dvbs2, dvbt, atsc, cqam;
 
 typedef struct dvb_device dvb_device_t;
 
@@ -59,6 +59,7 @@ int dvb_set_dvbt (dvb_device_t *, uint32_t freq, const char *mod,
 
 /* ATSC */
 int dvb_set_atsc (dvb_device_t *, uint32_t freq, const char *mod);
+int dvb_set_cqam (dvb_device_t *, uint32_t freq, const char *mod);
 
 /* ISDB-T */
 typedef struct isdbt_layer

modules/access/dtv/linux.c

@@ -726,3 +726,12 @@ int dvb_set_atsc (dvb_device_t *d, uint32_t freq, const char *modstr)
     return dvb_set_props (d, 4, DTV_CLEAR, 0, DTV_DELIVERY_SYSTEM, SYS_ATSC,
                           DTV_FREQUENCY, freq * 1000, DTV_MODULATION, mod);
 }
+
+int dvb_set_cqam (dvb_device_t *d, uint32_t freq, const char *modstr)
+{
+    unsigned mod = dvb_parse_modulation (modstr, QAM_AUTO);
+
+    return dvb_set_props (d, 4, DTV_CLEAR, 0,
+                          DTV_DELIVERY_SYSTEM, SYS_DVBC_ANNEX_B,
+                          DTV_FREQUENCY, freq * 1000, DTV_MODULATION, mod);
+}