From e27bc421bdd20c2a6485d67d8891c09bc07e3fd2 Mon Sep 17 00:00:00 2001
From: Martin Pulec <martin.pulec@cesnet.cz>
Date: Fri, 8 Oct 2021 17:09:58 +0200
Subject: [PATCH] Audio dump: added usage

---
 src/audio/playback/dump.cpp | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/audio/playback/dump.cpp b/src/audio/playback/dump.cpp
index fba6d560f..a400c4aac 100644
--- a/src/audio/playback/dump.cpp
+++ b/src/audio/playback/dump.cpp
@@ -62,13 +62,27 @@ struct audio_dump_state{
         unsigned file_name_num;
 };
 
+static void usage() {
+        printf("dump usage:\n"
+                        "\t-r dump[:<path>]\n"
+                        "where\n"
+                        "\tpath - path prefix to use (without .wav extension)\n"
+                        "\n");
+}
+
 static void * audio_play_dump_init(const char *cfg){
         struct audio_dump_state *s = new audio_dump_state();
 
-        if(cfg)
+        if (cfg != nullptr) {
+                if (strcmp(cfg, "help") == 0) {
+                        usage();
+                        delete s;
+                        return nullptr;
+                }
                 s->filename = cfg;
-        else
+        } else {
                 s->filename = "audio_dump";
+        }
 
         return s;
 }