new slave command: radio_step_freq

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@21058 b3059339-0415-0410-9bf9-f77b7e298cf2

DOCS/tech/slave.txt

@@ -222,6 +222,9 @@ radio_step_channel <-1|1>
     Step forwards (1) or backwards (-1) in channel list. Works only when the
     'channels' radio parameter was set.
 
+radio_step_freq <value>
+    Tune frequency by the <value> (positive - up, negative - down). 
+
 seek <value> [type]
     Seek to some place in the movie.
         0 is a relative seek of +/- <value> seconds (default).

input/input.c

@@ -51,6 +51,7 @@ static mp_cmd_t mp_cmds[] = {
   { MP_CMD_RADIO_STEP_CHANNEL, "radio_step_channel", 1,  { { MP_CMD_ARG_INT ,{0}}, {-1,{0}} }},
   { MP_CMD_RADIO_SET_CHANNEL, "radio_set_channel", 1, { { MP_CMD_ARG_STRING, {0}}, {-1,{0}}  }},
   { MP_CMD_RADIO_SET_FREQ, "radio_set_freq", 1, { {MP_CMD_ARG_FLOAT,{0}}, {-1,{0}} } },
+  { MP_CMD_RADIO_STEP_FREQ, "radio_step_freq", 1, { {MP_CMD_ARG_FLOAT,{0}}, {-1,{0}} } },
 #endif
   { MP_CMD_SEEK, "seek", 1, { {MP_CMD_ARG_FLOAT,{0}}, {MP_CMD_ARG_INT,{0}}, {-1,{0}} } },
   { MP_CMD_EDL_MARK, "edl_mark", 0, { {-1,{0}} } },

input/input.h

@@ -91,6 +91,7 @@
 #define MP_CMD_RADIO_SET_FREQ 89
 #define MP_CMD_SET_MOUSE_POS 90
 #define MP_CMD_STEP_PROPERTY 91
+#define MP_CMD_RADIO_STEP_FREQ 92
 
 #define MP_CMD_GUI_EVENTS       5000
 #define MP_CMD_GUI_LOADFILE     5001

mplayer.c

@@ -5025,6 +5025,11 @@ if(step_sec>0) {
       if (demuxer->stream->type==  STREAMTYPE_RADIO)
         radio_set_freq(demuxer->stream, cmd->args[0].v.f);
     } break;
+    case MP_CMD_RADIO_STEP_FREQ :
+      if (demuxer->stream->type == STREAMTYPE_RADIO){
+        radio_step_freq(demuxer->stream, cmd->args[0].v.f);
+      }
+    break;
 #endif
 #ifdef USE_TV
     case MP_CMD_TV_SET_FREQ :  {

stream/stream_radio.c

@@ -980,6 +980,27 @@ int radio_set_freq(struct stream_st *stream, float frequency){
     return 1;
 }
 
+/*****************************************************************
+ * \brief tune current frequency by step_interval value
+ * \parameter step_interval increment value
+ * \return 1 if success,0 - otherwise
+ *
+ */
+int radio_step_freq(struct stream_st *stream, float step_interval){
+    float frequency;
+    radio_priv_t* priv=(radio_priv_t*)stream->priv;
+    
+    if (get_frequency(priv,&frequency)!=STREAM_OK)
+        return 0;
+    
+    frequency+=step_interval;
+    if (frequency>priv->rangehigh)
+        frequency=priv->rangehigh;
+    if (frequency<priv->rangelow)
+        frequency=priv->rangelow;
+
+    return radio_set_freq(stream,frequency);
+}
 /*****************************************************************
  * \brief step channel up or down
  * \parameter direction RADIO_CHANNEL_LOWER - go to prev channel,RADIO_CHANNEL_HIGHER - to next

stream/stream_radio.h

@@ -22,6 +22,7 @@ int radio_get_freq(struct stream_st *stream, float* freq);
 char* radio_get_channel_name(struct stream_st *stream);
 int radio_set_channel(struct stream_st *stream, char *channel);
 int radio_step_channel(struct stream_st *stream, int direction);
+int radio_step_freq(struct stream_st *stream, float step_interval);
 
 #endif