[MPlayer-dev-eng] Patch: Option to specify when to stop encoding

[Fredrik Kuivinen]

Hi

This patch adds a command line option to mencoder. The purpose of this option
is to end the encoding at a specific place.

Example:

mencoder -end-at 10mb ...
Stop encoding when the output file has reached a size of 10MB 

mencoder -end-at 10kb ...
Stop encoding when the output file is 10KB

mencoder -end-at 1:23:12 ...
Stop encoding when 1 hour 23 minutes and 12 seconds of the input file has been
encoded. (Same syntax as -ss in mplayer.)

Some kind of stop-at-chapter-n would be nice too but I don't know where to add
it and I don't own any dvds so I wouldn't be able to test it anyway.

/ Fredrik Kuivinen

-------------- next part --------------
Index: cfg-mencoder.h
===================================================================
RCS file: /cvsroot/mplayer/main/cfg-mencoder.h,v
retrieving revision 1.16
diff -u -3 -p -r1.16 cfg-mencoder.h
--- cfg-mencoder.h	26 Dec 2001 19:45:44 -0000	1.16
+++ cfg-mencoder.h	14 Jan 2002 16:50:33 -0000
@@ -88,7 +88,9 @@ struct config oac_conf[]={
 struct config conf[]={
 	/* name, pointer, type, flags, min, max */
 	{"include", cfg_include, CONF_TYPE_FUNC_PARAM, 0, 0, 0}, /* this must be the first!!! */
-
+    
+    {"end-at", parse_end_at, CONF_TYPE_FUNC_PARAM, 0, 0, 0},
+        
 	{"ofps", &force_ofps, CONF_TYPE_FLOAT, CONF_MIN, 0, 0},
 	{"o", &out_filename, CONF_TYPE_STRING, 0, 0, 0},
 
Index: mencoder.c
===================================================================
RCS file: /cvsroot/mplayer/main/mencoder.c,v
retrieving revision 1.56
diff -u -3 -p -r1.56 mencoder.c
--- mencoder.c	11 Jan 2002 16:06:44 -0000	1.56
+++ mencoder.c	14 Jan 2002 16:50:35 -0000
@@ -177,6 +177,8 @@ static int cfg_include(struct config *co
 	return parse_config_file(conf, filename);
 }
 
+static int parse_end_at(struct config *conf, const char* param);
+
 #include "get_path.c"
 
 #include "cfg-mplayer-def.h"
@@ -302,6 +304,10 @@ int dec_audio(sh_audio_t *sh_audio,unsig
 static int eof=0;
 static int interrupted=0;
 
+enum end_at_type_t {END_AT_NONE, END_AT_TIME, END_AT_SIZE};
+static enum end_at_type_t end_at_type = END_AT_NONE;
+static int end_at;
+
 static void exit_sighandler(int x){
     eof=1;
     interrupted=1;
@@ -1040,6 +1046,10 @@ while(!eof){
     int in_size;
     int skip_flag=0; // 1=skip  -1=duplicate
 
+    if((end_at_type == END_AT_SIZE && end_at <= ftell(muxer_f))  ||
+       (end_at_type == END_AT_TIME && end_at < sh_video->timer))
+        play_n_frames = 0;
+           
     if(play_n_frames>=0){
       --play_n_frames;
       if(play_n_frames<0) break;
@@ -1339,4 +1349,54 @@ printf("\nAudio stream: %8.3f kbit/s  (%
 if(stream) free_stream(stream); // kill cache thread
 
 return interrupted;
+}
+
+static int parse_end_at(struct config *conf, const char* param)
+{
+    int i;
+
+    end_at_type = END_AT_NONE;
+    
+    /* End at size parsing */
+    {
+        char unit[4];
+        
+        end_at_type = END_AT_SIZE;
+
+        if(sscanf(param, "%d%3s", &end_at, unit) == 2) {
+            if(!strcasecmp(unit, "b"))
+                ;
+            else if(!strcasecmp(unit, "kb"))
+                end_at *= 1024;
+            else if(!strcasecmp(unit, "mb"))
+                end_at *= 1024*1024;
+            else
+                end_at_type = END_AT_NONE;
+        }
+        else
+            end_at_type = END_AT_NONE;
+    }
+
+    /* End at time parsing. This has to be last because of
+     * sscanf("%f", ...) below */
+    if(end_at_type == END_AT_NONE)
+    {
+        int a,b; float d;
+
+        end_at_type = END_AT_TIME;
+        
+        if (sscanf(param, "%d:%d:%f", &a, &b, &d) == 3)
+            end_at = 3600*a + 60*b + d;
+        else if (sscanf(param, "%d:%f", &a, &d) == 2)
+            end_at = 60*a + d;
+        else if (sscanf(param, "%f", &d) == 1)
+            end_at = d;
+        else
+            end_at_type = END_AT_NONE;
+    }
+
+    if(end_at_type == END_AT_NONE)
+        return ERR_FUNC_ERR;
+
+    return 1;
 }