shithub: opus

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opus_demo: Implement -enc_loss

Simulates the loss on the encoder side and store lost packets as empty
packets in the output bitstream.

--- a/src/opus_demo.c

+++ b/src/opus_demo.c

@@ -140,6 +140,7 @@

 #endif

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

     fprintf(stderr, "-dred <frames>       : add Deep REDundancy (in units of 10-ms frames)\n" );

+    fprintf(stderr, "-enc_loss            : Apply loss on the encoder side (store empty packets)\n" );

 }

 #define FORMAT_S16_LE 0

@@ -425,6 +426,7 @@

     int lost_count=0;

     FILE *packet_loss_file=NULL;

     int dred_duration=0;

+    int encoder_loss=0;

 #ifdef ENABLE_OSCE_TRAINING_DATA

     int silk_random_switching = 0;

     int silk_frame_counter = 0;

@@ -623,6 +625,10 @@

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

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

             args += 2;

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

+            check_encoder_option(decode_only, "-enc_loss");

+            encoder_loss = 1;

+            args++;

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

             check_encoder_option(decode_only, "-sweep");

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

@@ -986,9 +992,26 @@

            len = new_len;

         }

 #endif

+        if (encode_only && !encoder_loss) {

+            lost = 0;

+        } else if (packet_loss_file != NULL) {

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

+                lost = 0;

+            }

+#ifdef ENABLE_LOSSGEN

+        } else if (lossgen_perc >= 0) {

+            lost = sample_loss(&lossgen, lossgen_perc*.01f);

+#endif

+        } else {

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

+        }

         if (encode_only)

         {

             unsigned char int_field[4];

+            if (lost) {

+               enc_final_range = 0;

+               len = 0;

+            }

             int_to_char(len, int_field);

             if (fwrite(int_field, 1, 4, fout) != 4) {

                fprintf(stderr, "Error writing.\n");

@@ -1009,17 +1032,6 @@

             int run_decoder;

             int dred_input=0;

             int dred_end=0;

-            if (packet_loss_file != NULL) {

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

-                    lost = 0;

-                }

-#ifdef ENABLE_LOSSGEN

-            } else if (lossgen_perc >= 0) {

-               lost = sample_loss(&lossgen, lossgen_perc*.01f);

-#endif

-            } else {

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

-            }

             if (len == 0) lost = 1;

             if (lost)

             {

-- 

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