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Commit 94d28be1 authored by Mikhail Naganov's avatar Mikhail Naganov
Browse files

aaudio: Update aaudio_loopback help screen 

Fix "-c{inputChannels}" -- it's actually for output channels.
Add description for "-m" options.
Add description for "-x" option.

Test: builds
Change-Id: Ib234d1a5eaff75e209041d08f5149f488c1f5867
parent 002565a3

media/libaaudio/examples/loopback/src/loopback.cpp

+10 −3
Original line number Diff line number Diff line
@@ -160,9 +160,14 @@ static void MyErrorCallbackProc( 


static void usage() {

    printf("Usage: aaudio_loopback [OPTION]...\n\n");

    printf("          -c{inputChannels} number of input channels\n");

    printf("          -c{channels}      number of output channels\n");

    printf("          -C{channels}      number of input channels\n");

    printf("          -g{gain}          recirculating loopback gain\n");

    printf("          -m                enable MMAP mode\n");

    printf("          -m{0|1|2|3}       set MMAP policy\n");

    printf("              0 = _UNSPECIFIED\n");

    printf("              1 = _NEVER\n");

    printf("              2 = _AUTO, also if -m is used with no number\n");

    printf("              3 = _ALWAYS\n");

    printf("          -n{numBursts}     buffer size, for example 2 for double buffered\n");

    printf("          -p{outPerf}       set output AAUDIO_PERFORMANCE_MODE*\n");

    printf("          -P{inPerf}        set input AAUDIO_PERFORMANCE_MODE*\n");
@@ -172,7 +177,9 @@ static void usage() { 
    printf("          -t{test}          select test mode\n");

    printf("              m for sine magnitude\n");

    printf("              e for echo latency (default)\n\n");

    printf("Example:  aaudio_loopback -n2 -pl -Pn\n");

    printf("          -x                use EXCLUSIVE mode for output\n");

    printf("          -X                use EXCLUSIVE mode for input\n");

    printf("Example:  aaudio_loopback -n2 -pl -Pl -x\n");

}



static aaudio_performance_mode_t parsePerformanceMode(char c) {