shithub: opus-tools

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implement seeking for opusdec (thanks sigrid)

--- a/src/opusdec.c

+++ b/src/opusdec.c

@@ -463,6 +463,7 @@

    printf(" --force-wav           Force Wave header on output\n");

    printf(" --packet-loss n       Simulate n %% random packet loss\n");

    printf(" --save-range file     Save check values for every frame to a file\n");

+   printf(" -s, --seek seconds    Seek within the stream before decoding\n");

 }

 void version(void)

@@ -682,6 +683,7 @@

    ogg_int64_t nb_read_total=0;

    ogg_int64_t link_read=0;

    ogg_int64_t link_out=0;

+   double seek=0.0;

    struct option long_options[] =

    {

       {"help", no_argument, NULL, 0},

@@ -696,6 +698,7 @@

       {"force-wav", no_argument, NULL, 0},

       {"packet-loss", required_argument, NULL, 0},

       {"save-range", required_argument, NULL, 0},

+      {"seek", required_argument, NULL, 0},

       {0, 0, 0, 0}

    };

    opus_int64 audio_size=0;

@@ -734,7 +737,7 @@

    /*Process options*/

    while (1)

    {

-      c = getopt_long(argc_utf8, argv_utf8, "hV",

+      c = getopt_long(argc_utf8, argv_utf8, "hVs:",

                        long_options, &option_index);

       if (c==-1)

          break;

@@ -781,6 +784,9 @@

          } else if (strcmp(long_options[option_index].name,"packet-loss")==0)

          {

             loss_percent = atof(optarg);

+         } else if (strcmp(long_options[option_index].name,"seek")==0)

+         {

+            seek = atof(optarg);

          }

          break;

       case 'h':

@@ -789,6 +795,9 @@

       case 'V':

          version();

          goto done;

+      case 's':

+         seek = atof(optarg);

+         break;

       case '?':

          usage();

          exit_code=1;

@@ -997,6 +1006,14 @@

       cb_ctx.loss_percent=loss_percent;

       cb_ctx.frange=frange;

       op_set_decode_callback(st, (op_decode_cb_func)decode_cb, &cb_ctx);

+   }

+

+   if (seek > 0.0) {

+      if (op_pcm_seek(st, seek*48000) != 0)

+      {

+         seek = 0.0;

+      }

+      fprintf(stderr, "time: %g\n", seek);

    }

    /*Main decoding loop*/

-- 

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