DTV: pass FEC parameters as integers internally

modules/access/dtv/access.c

@@ -91,7 +91,7 @@ static const char *const auto_off_on_user[] = { N_("Automatic"),
 #define CODE_RATE_LONGTEXT N_( \
     "The code rate for Forward Error Correction can be specified.")
 static const char *const code_rate_vlc[] = { "",
-    "none", /*"1/4", "1/3",*/ "1/2", "3/5", "2/3", "3/4",
+    "0", /*"1/4", "1/3",*/ "1/2", "3/5", "2/3", "3/4",
     "4/5", "5/6", "6/7", "7/8", "8/9", "9/10",
 };
 static const char *const code_rate_user[] = { N_("Automatic"),
@@ -252,13 +252,9 @@ vlc_module_begin ()
     add_integer ("dvb-srate", 0, SRATE_TEXT, SRATE_LONGTEXT, false)
         change_integer_range (0, UINT64_C(0xffffffff))
         change_safe ()
-    add_string ("dvb-code-rate", "", CODE_RATE_TEXT, CODE_RATE_LONGTEXT, true)
+    add_string ("dvb-fec", "", CODE_RATE_TEXT, CODE_RATE_LONGTEXT, true)
         change_string_list (code_rate_vlc, code_rate_user, NULL)
         change_safe ()
-    add_integer ("dvb-fec", 9, " ", " ", true)
-        change_integer_range (0, 9)
-        change_private ()
-        change_safe ()
     set_section (N_("DVB-S2 parameters"), NULL)
     add_integer ("dvb-pilot", -1, PILOT_TEXT, PILOT_TEXT, true)
         change_integer_list (auto_off_on_vlc, auto_off_on_user)
@@ -533,23 +529,34 @@ static unsigned var_InheritFrequency (vlc_object_t *obj)
     return freq;
 }
 
-static char *var_InheritCodeRate (vlc_object_t *obj)
+static uint32_t var_InheritCodeRate (vlc_object_t *obj, const char *varname)
 {
-    char *code_rate = var_InheritString (obj, "dvb-code-rate");
-    if (code_rate != NULL)
-        return code_rate;
+    char *code_rate = var_InheritString (obj, varname);
+    if (code_rate == NULL)
+        return VLC_FEC_AUTO;
 
+    uint16_t a, b;
+    int v = sscanf (code_rate, "%"SCNu16"/%"SCNu16, &a, &b);
+    free (code_rate);
+    switch (v)
+    {
+        case 2:
+            return VLC_FEC(a, b);
+        case 1:
+            if (a == 0)
+                return 0;
             /* Backward compatibility with VLC < 1.2 (= Linux DVBv3 enum) */
-    unsigned fec = var_InheritInteger (obj, "dvb-fec");
-    if (fec < 9)
+            if (a < 9)
             {
-        static const char linux_dvb[9][5] = {
-            "none", "1/2", "2/3", "3/4", "4/5", "5/6", "6/7", "7/8" };
-        msg_Warn (obj, "\"fec=%u\" option is obsolete. "
-                       "Use \"code-rate=%s\" instead.", fec, linux_dvb[fec]);
-        return strdup (linux_dvb[fec]);
+                msg_Warn (obj, "\"%s=%"PRIu16"\" option is obsolete. "
+                          "Use \"%s=%"PRIu16"/%"PRIu16"\" instead.",
+                          varname + 4, a, varname + 4, a, a + 1);
+                return VLC_FEC(a, a + 1);
             }
-    return NULL;
+            else
+                msg_Warn (obj, "\"fec=9\" option is obsolete.");
+    }
+    return VLC_FEC_AUTO;
 }
 
 static char *var_InheritModulation (vlc_object_t *obj)
@@ -637,11 +644,10 @@ const delsys_t cqam = { .setup = cqam_setup };
 static int dvbc_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 {
     char *mod = var_InheritModulation (obj);
-    char *fec = var_InheritCodeRate (obj);
+    uint32_t fec = var_InheritCodeRate (obj, "dvb-fec");
     unsigned srate = var_InheritInteger (obj, "dvb-srate");
 
     int ret = dvb_set_dvbc (dev, freq, mod, srate, fec);
-    free (fec);
     free (mod);
     return ret;
 }
@@ -689,11 +695,10 @@ static int sec_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 
 static int dvbs_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 {
-    char *fec = var_InheritCodeRate (obj);
+    uint32_t fec = var_InheritCodeRate (obj, "dvb-fec");
     uint32_t srate = var_InheritInteger (obj, "dvb-srate");
 
     int ret = dvb_set_dvbs (dev, freq, srate, fec);
-    free (fec);
     if (ret == 0)
         ret = sec_setup (obj, dev, freq);
     return ret;
@@ -702,13 +707,12 @@ static int dvbs_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 static int dvbs2_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 {
     char *mod = var_InheritModulation (obj);
-    char *fec = var_InheritCodeRate (obj);
+    uint32_t fec = var_InheritCodeRate (obj, "dvb-fec");
     uint32_t srate = var_InheritInteger (obj, "dvb-srate");
     int pilot = var_InheritInteger (obj, "dvb-pilot");
     int rolloff = var_InheritInteger (obj, "dvb-rolloff");
 
     int ret = dvb_set_dvbs2 (dev, freq, mod, srate, fec, pilot, rolloff);
-    free (fec);
     free (mod);
     if (ret == 0)
         ret = sec_setup (obj, dev, freq);
@@ -723,16 +727,14 @@ const delsys_t dvbs2 = { .setup = dvbs2_setup };
 static int dvbt_setup (vlc_object_t *obj, dvb_device_t *dev, unsigned freq)
 {
     char *mod = var_InheritModulation (obj);
-    char *fec_hp = var_InheritString (obj, "dvb-code-rate-hp");
-    char *fec_lp = var_InheritString (obj, "dvb-code-rate-lp");
+    uint32_t fec_hp = var_InheritCodeRate (obj, "dvb-code-rate-hp");
+    uint32_t fec_lp = var_InheritCodeRate (obj, "dvb-code-rate-lp");
     uint32_t guard = var_InheritGuardInterval (obj);
     uint32_t bw = var_InheritInteger (obj, "dvb-bandwidth");
     int tx = var_InheritInteger (obj, "dvb-transmission");
     int h = var_InheritInteger (obj, "dvb-hierarchy");
 
     int ret = dvb_set_dvbt (dev, freq, mod, fec_hp, fec_lp, bw, tx, guard, h);
-    free (fec_lp);
-    free (fec_hp);
     free (mod);
     return ret;
 }

modules/access/dtv/dtv.h

@@ -40,24 +40,25 @@ float dvb_get_snr (dvb_device_t *);
 int dvb_set_inversion (dvb_device_t *, int);
 int dvb_tune (dvb_device_t *);
 
+#define VLC_FEC(a,b)   (((a) << 16u) | (b))
+#define VLC_FEC_AUTO   0xFFFFFFFF
 #define VLC_GUARD(a,b) (((a) << 16u) | (b))
 #define VLC_GUARD_AUTO 0xFFFFFFFF
 
 /* DVB-C */
 int dvb_set_dvbc (dvb_device_t *, uint32_t freq, const char *mod,
-                  uint32_t srate, const char *fec);
+                  uint32_t srate, uint32_t fec);
 
 /* DVB-S */
-int dvb_set_dvbs (dvb_device_t *, uint32_t freq, uint32_t srate,
-                  const char *fec);
+int dvb_set_dvbs (dvb_device_t *, uint32_t freq, uint32_t srate, uint32_t fec);
 int dvb_set_dvbs2 (dvb_device_t *, uint32_t freq, const char *mod,
-                   uint32_t srate, const char *fec, int pilot, int rolloff);
+                   uint32_t srate, uint32_t fec, int pilot, int rolloff);
 int dvb_set_sec (dvb_device_t *, uint32_t freq, char pol,
                  uint32_t lowf, uint32_t highf, uint32_t switchf);
 
 /* DVB-T */
 int dvb_set_dvbt (dvb_device_t *, uint32_t freq, const char *mod,
-                  const char *fec_hp, const char *fec_lp, uint32_t bandwidth,
+                  uint32_t fec_hp, uint32_t fec_lp, uint32_t bandwidth,
                   int transmission, uint32_t guard, int hierarchy);
 
 /* ATSC */

modules/access/dtv/linux.c

@@ -140,24 +140,26 @@ static int dvb_parse_modulation (const char *str, int def)
     return dvb_parse_str (str, mods, sizeof (mods) / sizeof (*mods), def);
 }
 
-static int dvb_parse_fec (const char *str)
+static int dvb_parse_fec (uint32_t fec)
 {
-    static const dvb_str_map_t rates[] =
+    static const dvb_int_map_t rates[] =
     {
-        { "",     FEC_AUTO },
-        { "1/2",  FEC_1_2  },
+        { 0,             FEC_NONE },
+        { VLC_FEC(1,2),  FEC_1_2  },
         // TODO: 1/3
         // TODO: 1/4
-        { "2/3",  FEC_2_3  },
-        { "3/4",  FEC_3_4  },
-        { "4/5",  FEC_4_5  },
-        { "5/6",  FEC_5_6  },
-        { "6/7",  FEC_6_7  },
-        { "7/8",  FEC_7_8  },
-        { "8/9",  FEC_8_9  },
-        { "9/10", FEC_9_10 },
+        { VLC_FEC(2,3),  FEC_2_3  },
+        { VLC_FEC(3,4),  FEC_3_4  },
+        { VLC_FEC(3,5),  FEC_3_5  },
+        { VLC_FEC(4,5),  FEC_4_5  },
+        { VLC_FEC(5,6),  FEC_5_6  },
+        { VLC_FEC(6,7),  FEC_6_7  },
+        { VLC_FEC(7,8),  FEC_7_8  },
+        { VLC_FEC(8,9),  FEC_8_9  },
+        { VLC_FEC(9,10), FEC_9_10 },
+        { VLC_FEC_AUTO,  FEC_AUTO },
     };
-    return dvb_parse_str (str, rates, sizeof (rates) / sizeof (*rates),
+    return dvb_parse_int (fec, rates, sizeof (rates) / sizeof (*rates),
                           FEC_AUTO);
 }
 
@@ -531,10 +533,10 @@ int dvb_tune (dvb_device_t *d)
 
 /*** DVB-C ***/
 int dvb_set_dvbc (dvb_device_t *d, uint32_t freq, const char *modstr,
-                  uint32_t srate, const char *fecstr)
+                  uint32_t srate, uint32_t fec)
 {
     unsigned mod = dvb_parse_modulation (modstr, QAM_AUTO);
-    unsigned fec = dvb_parse_fec (fecstr);
+    fec = dvb_parse_fec (fec);
 
     return dvb_set_props (d, 6, DTV_CLEAR, 0,
                           DTV_DELIVERY_SYSTEM, SYS_DVBC_ANNEX_AC,
@@ -655,10 +657,9 @@ known:
     return dvb_set_props (d, 2, DTV_FREQUENCY, freq, DTV_TONE, tone);
 }
 
-int dvb_set_dvbs (dvb_device_t *d, uint32_t freq,
-                  uint32_t srate, const char *fecstr)
+int dvb_set_dvbs (dvb_device_t *d, uint32_t freq, uint32_t srate, uint32_t fec)
 {
-    unsigned fec = dvb_parse_fec (fecstr);
+    fec = dvb_parse_fec (fec);
 
     return dvb_set_props (d, 5, DTV_CLEAR, 0, DTV_DELIVERY_SYSTEM, SYS_DVBS,
                           DTV_FREQUENCY, freq, DTV_SYMBOL_RATE, srate,
@@ -666,10 +667,10 @@ int dvb_set_dvbs (dvb_device_t *d, uint32_t freq,
 }
 
 int dvb_set_dvbs2 (dvb_device_t *d, uint32_t freq, const char *modstr,
-                   uint32_t srate, const char *fecstr, int pilot, int rolloff)
+                   uint32_t srate, uint32_t fec, int pilot, int rolloff)
 {
     unsigned mod = dvb_parse_modulation (modstr, QPSK);
-    unsigned fec = dvb_parse_fec (fecstr);
+    fec = dvb_parse_fec (fec);
 
     switch (pilot)
     {
@@ -742,12 +743,12 @@ static int dvb_parse_hierarchy (int i)
 }
 
 int dvb_set_dvbt (dvb_device_t *d, uint32_t freq, const char *modstr,
-                  const char *fechstr, const char *feclstr, uint32_t bandwidth,
+                  uint32_t fec_hp, uint32_t fec_lp, uint32_t bandwidth,
                   int transmit_mode, uint32_t guard, int hierarchy)
 {
     uint32_t mod = dvb_parse_modulation (modstr, QAM_AUTO);
-    uint32_t fec_hp = dvb_parse_fec (fechstr);
-    uint32_t fec_lp = dvb_parse_fec (feclstr);
+    fec_hp = dvb_parse_fec (fec_hp);
+    fec_lp = dvb_parse_fec (fec_lp);
     bandwidth *= 1000000;
     transmit_mode = dvb_parse_transmit_mode (transmit_mode);
     guard = dvb_parse_guard (guard);