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-rw-r--r--src/AlsaDabplus.cpp19
1 files changed, 15 insertions, 4 deletions
diff --git a/src/AlsaDabplus.cpp b/src/AlsaDabplus.cpp
index c08c98d..99eec6e 100644
--- a/src/AlsaDabplus.cpp
+++ b/src/AlsaDabplus.cpp
@@ -40,9 +40,9 @@ using namespace std;
void usage(const char* name) {
fprintf(stderr,
- "%s is a HE-AACv2 encoder for DAB+ based on fdk-aac-dabplus\n"
- "that can encode from a ALSA source, and encode\n"
- "to a ZeroMQ output for ODR-DabMux.\n"
+ "dabplus-enc-alsa-zmq %s is a HE-AACv2 encoder for DAB+\n"
+ "based on fdk-aac-dabplus that can read from a ALSA source\n"
+ "and encode to a ZeroMQ output for ODR-DabMux.\n"
"\n"
"The -D option enables experimental sound card clock drift compensation.\n"
"A consumer sound card has a clock that is always a bit imprecise, and\n"
@@ -62,7 +62,13 @@ void usage(const char* name) {
"\n"
" http://opendigitalradio.org\n"
"\nUsage:\n"
- "%s [OPTION...]\n", name, name);
+ "%s [OPTION...]\n",
+#if defined(GITVERSION)
+ GITVERSION
+#else
+ PACKAGE_VERSION
+#endif
+ , name);
fprintf(stderr,
" -b, --bitrate={ 8, 16, ..., 192 } Output bitrate in kbps. Must be 8 multiple.\n"
" -D, --drift-comp Enable ALSA sound card drift compensation.\n"
@@ -206,6 +212,11 @@ int main(int argc, char *argv[]) {
{0,0,0,0},
};
+ if (argc < 2) {
+ usage(argv[0]);
+ return 1;
+ }
+
int index;
while(ch != -1) {
ch = getopt_long(argc, argv, "hab:c:o:r:d:Dp:P:", longopts, &index);