allow to step only one frame forward by pressing s.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13627 b3059339-0415-0410-9bf9-f77b7e298cf2

DOCS/man/en/mplayer.1

@@ -227,6 +227,10 @@ next/\:previous playtree entry in the parent list
 next/\:previous alternative source (ASX playlist only)
 .IPs "p / SPACE"
 Pause movie (any key unpauses).
+.IPs "s"
+Step forward.
+Pressing once will pause movie, every consecutive press will play one frame
+and then go into pause mode again (any other key unpauses).
 .IPs "q / ESC"
 Stop playing and quit.
 .IPs "+ and -"

DOCS/tech/slave.txt

@@ -28,6 +28,9 @@ quit [<value>]
 pause
     Pause/unpause the playback.
 
+frame_step
+    Play one frame, then pause again.
+
 grab_frames
     ???
 

etc/input.conf

@@ -19,6 +19,7 @@ q quit
 ESC quit
 ENTER pt_step 1 1
 p pause
+s frame_step
 SPACE pause
 HOME pt_up_step 1
 END pt_up_step -1

input/input.c

@@ -57,6 +57,7 @@ static mp_cmd_t mp_cmds[] = {
   { MP_CMD_AUDIO_DELAY, "audio_delay", 1, { {MP_CMD_ARG_FLOAT,{0}}, {-1,{0}} } },
   { MP_CMD_QUIT, "quit", 0, { {MP_CMD_ARG_INT,{0}}, {-1,{0}} } },
   { MP_CMD_PAUSE, "pause", 0, { {-1,{0}} } },
+  { MP_CMD_FRAME_STEP, "frame_step", 0, { {-1,{0}} } },
   { MP_CMD_GRAB_FRAMES, "grab_frames",0, { {-1,{0}} }  },
   { MP_CMD_PLAY_TREE_STEP, "pt_step",1, { { MP_CMD_ARG_INT ,{0}}, { MP_CMD_ARG_INT ,{0}}, {-1,{0}} } },
   { MP_CMD_PLAY_TREE_UP_STEP, "pt_up_step",1,  { { MP_CMD_ARG_INT,{0} }, { MP_CMD_ARG_INT ,{0}}, {-1,{0}} } },

input/input.h

@@ -57,6 +57,7 @@
 #define MP_CMD_VO_ROOTWIN 53
 #define MP_CMD_SWITCH_VSYNC 54
 #define MP_CMD_SWITCH_RATIO 55
+#define MP_CMD_FRAME_STEP 56
 
 #define MP_CMD_GUI_EVENTS       5000
 #define MP_CMD_GUI_LOADFILE     5001

mplayer.c

@@ -2597,6 +2597,7 @@ if (stream->type==STREAMTYPE_DVDNAV && dvd_nav_still)
       osd_show_av_delay = 9;
       if(sh_audio) sh_audio->delay+= v;
     } break;
+    case MP_CMD_FRAME_STEP :
     case MP_CMD_PAUSE : {
       osd_function=OSD_PAUSE;
       brk_cmd = 1;