Redesign opt_programid code.

Its now possible to also select programs per input file and there is
less code duplication.

Originally committed as revision 21999 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -1646,32 +1646,6 @@ static void print_sdp(AVFormatContext **avc, int n)
     fflush(stdout);
 }
 
-static int stream_index_from_inputs(AVFormatContext **input_files,
-                                    int nb_input_files,
-                                    AVInputFile *file_table,
-                                    AVInputStream **ist_table,
-                                    enum CodecType type,
-                                    int programid)
-{
-    int p, q, z;
-    for(z=0; z<nb_input_files; z++) {
-        AVFormatContext *ic = input_files[z];
-        for(p=0; p<ic->nb_programs; p++) {
-            AVProgram *program = ic->programs[p];
-            if(program->id != programid)
-                continue;
-            for(q=0; q<program->nb_stream_indexes; q++) {
-                int sidx = program->stream_index[q];
-                int ris = file_table[z].ist_index + sidx;
-                if(ist_table[ris]->discard && ic->streams[sidx]->codec->codec_type == type)
-                    return ris;
-            }
-        }
-    }
-
-    return -1;
-}
-
 /*
  * The following code is the main loop of the file converter
  */
@@ -1803,33 +1777,39 @@ static int av_encode(AVFormatContext **output_files,
                 }
 
             } else {
-                if(opt_programid) {
-                    found = 0;
-                    j = stream_index_from_inputs(input_files, nb_input_files, file_table, ist_table, ost->st->codec->codec_type, opt_programid);
-                    if(j != -1) {
-                        ost->source_index = j;
-                        found = 1;
-                    }
-                } else {
                     /* get corresponding input stream index : we select the first one with the right type */
                     found = 0;
                     for(j=0;j<nb_istreams;j++) {
+                        int skip=0;
                         ist = ist_table[j];
-                        if (ist->discard &&
+                        if(opt_programid){
+                            int pi,si;
+                            AVFormatContext *f= input_files[ ist->file_index ];
+                            skip=1;
+                            for(pi=0; pi<f->nb_programs; pi++){
+                                AVProgram *p= f->programs[pi];
+                                if(p->id == opt_programid)
+                                    for(si=0; si<p->nb_stream_indexes; si++){
+                                        if(f->streams[ p->stream_index[si] ] == ist->st)
+                                            skip=0;
+                                    }
+                            }
+                        }
+                        if (ist->discard && ist->st->discard != AVDISCARD_ALL && !skip &&
                             ist->st->codec->codec_type == ost->st->codec->codec_type) {
                             ost->source_index = j;
                             found = 1;
                             break;
                         }
                     }
-                }
 
                 if (!found) {
                     if(! opt_programid) {
                         /* try again and reuse existing stream */
                         for(j=0;j<nb_istreams;j++) {
                             ist = ist_table[j];
-                            if (ist->st->codec->codec_type == ost->st->codec->codec_type) {
+                            if (   ist->st->codec->codec_type == ost->st->codec->codec_type
+                                && ist->st->discard != AVDISCARD_ALL) {
                                 ost->source_index = j;
                                 found = 1;
                             }
@@ -2909,10 +2889,27 @@ static void opt_input_file(const char *filename)
         av_exit(1);
     }
     if(opt_programid) {
-        int i;
-        for(i=0; i<ic->nb_programs; i++)
-            if(ic->programs[i]->id != opt_programid)
-                ic->programs[i]->discard = AVDISCARD_ALL;
+        int i, j;
+        int found=0;
+        for(i=0; i<ic->nb_streams; i++){
+            ic->streams[i]->discard= AVDISCARD_ALL;
+        }
+        for(i=0; i<ic->nb_programs; i++){
+            AVProgram *p= ic->programs[i];
+            if(p->id != opt_programid){
+                p->discard = AVDISCARD_ALL;
+            }else{
+                found=1;
+                for(j=0; j<p->nb_stream_indexes; j++){
+                    ic->streams[p->stream_index[j]]->discard= 0;
+                }
+            }
+        }
+        if(!found){
+            fprintf(stderr, "Specified program id not found\n");
+            av_exit(1);
+        }
+        opt_programid=0;
     }
 
     ic->loop_input = loop_input;