shithub: opus

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Adds -lossfile option to opus_demo

--- a/src/opus_demo.c

+++ b/src/opus_demo.c

@@ -62,7 +62,8 @@

     fprintf(stderr, "-inbandfec           : enable SILK inband FEC\n" );

     fprintf(stderr, "-forcemono           : force mono encoding, even for stereo input\n" );

     fprintf(stderr, "-dtx                 : enable SILK DTX\n" );

-    fprintf(stderr, "-loss <perc>         : simulate packet loss, in percent (0-100); default: 0\n" );

+    fprintf(stderr, "-loss <perc>         : optimize for loss percentage and simulate packet loss, in percent (0-100); default: 0\n" );

+    fprintf(stderr, "-lossfile <file>     : simulate packet loss, reading loss from file\n" );

 }

 static void int_to_char(opus_uint32 i, unsigned char ch[4])

@@ -264,6 +265,7 @@

     int delayed_decision=0;

     int ret = EXIT_FAILURE;

     int lost_count=0;

+    FILE *packet_loss_file=NULL;

     if (argc < 5 )

     {

@@ -422,6 +424,13 @@

         } else if( strcmp( argv[ args ], "-loss" ) == 0 ) {

             packet_loss_perc = atoi( argv[ args + 1 ] );

             args += 2;

+        } else if( strcmp( argv[ args ], "-lossfile" ) == 0 ) {

+            packet_loss_file = fopen( argv[ args + 1 ], "r" );

+            if (packet_loss_file == NULL) {

+                fprintf(stderr, "failed to open loss file %s\n", argv[ args + 1 ] );

+                exit(1);

+            }

+            args += 2;

         } else if( strcmp( argv[ args ], "-sweep" ) == 0 ) {

             check_encoder_option(decode_only, "-sweep");

             sweep_bps = atoi( argv[ args + 1 ] );

@@ -760,7 +769,14 @@

         } else {

             int fr;

             int run_decoder;

-            lost = len==0 || (packet_loss_perc>0 && rand()%100 < packet_loss_perc);

+            if (packet_loss_file != NULL) {

+                if ( fscanf(packet_loss_file, "%d", &lost) != 1) {

+                    lost = 0;

+                }

+            } else {

+              lost = (packet_loss_perc>0) && (rand()%100 < packet_loss_perc);

+            }

+            if (len == 0) lost = 1;

             if (lost)

             {

                lost_count++;

-- 

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