cli tools: fix frame size estimation when frame_length isn't provided

In multi channel scenario a frame sz become too big and Frame Factory
refuses to allocate frames. Here the max frame size is estimated
similar way to max packet sz estimation.

Author: baranovmv

src/tools/roc_copy/main.cpp

@@ -124,7 +124,12 @@ size_t compute_max_frame_size(const sndio::IoConfig& io_config) {
                       audio::ChanLayout_Surround, audio::ChanOrder_Smpte,
                       audio::ChanMask_Surround_7_1_4, 48000);
 
-    return spec.ns_2_samples_overall(io_config.frame_length) * sizeof(audio::sample_t);
+    core::nanoseconds_t len = io_config.frame_length;
+    if (len == 0) {
+        len = 10 * core::Millisecond;
+    }
+
+    return spec.ns_2_samples_overall(len) * sizeof(audio::sample_t);
 }
 
 bool parse_input_uri(const gengetopt_args_info& args, address::IoUri& input_uri) {

src/tools/roc_send/main.cpp

@@ -113,6 +113,17 @@ bool build_context_config(const gengetopt_args_info& args,
             roc_log(LogError, "invalid --max-frame-size: should be > 0");
             return false;
         }
+    } else {
+        audio::SampleSpec spec = io_config.sample_spec;
+        spec.use_defaults(audio::Format_Pcm, audio::PcmSubformat_Raw,
+                          audio::ChanLayout_Surround, audio::ChanOrder_Smpte,
+                          audio::ChanMask_Surround_7_1_4, 48000);
+        core::nanoseconds_t len = io_config.frame_length;
+        if (len == 0) {
+            len = 10 * core::Millisecond;
+        }
+        context_config.max_frame_size =
+            spec.ns_2_samples_overall(len) * sizeof(audio::sample_t);
     }
 
     return true;