diff options
| -rw-r--r-- | test/latency.c | 96 |
1 files changed, 93 insertions, 3 deletions
diff --git a/test/latency.c b/test/latency.c index e6855d15..35cc59cb 100644 --- a/test/latency.c +++ b/test/latency.c @@ -3,6 +3,7 @@ #include <string.h> #include <sched.h> #include <errno.h> +#include <getopt.h> #include "../include/asoundlib.h" #include <sys/time.h> @@ -298,16 +299,100 @@ long writebuf(snd_pcm_t *handle, char *buf, long len, size_t *frames) return 0; } -int main(void) +void help(void) { + int k; + printf("\ +Usage: latency [OPTION]... [FILE]... +-h,--help help +-P,--pdevice playback device +-C,--cdevice capture device +-m,--min minimum latency in frames +-M,--max maximum latency in frames +-F,--frames frames to transfer +-f,--format sample format +-c,--channels channels +-r,--rate rate +"); + printf("Recognized sample formats are:"); + for (k = 0; k < SND_PCM_FORMAT_LAST; ++(unsigned long) k) { + const char *s = snd_pcm_format_name(k); + if (s) + printf(" %s", s); + } + printf("\n"); +} + +int main(int argc, char *argv[]) +{ + struct option long_option[] = + { + {"help", 0, NULL, 'h'}, + {"pdevice", 1, NULL, 'P'}, + {"cdevice", 1, NULL, 'C'}, + {"min", 1, NULL, 'm'}, + {"max", 1, NULL, 'M'}, + {"frames", 1, NULL, 'F'}, + {"format", 1, NULL, 'f'}, + {"channels", 1, NULL, 'c'}, + {"rate", 1, NULL, 'r'}, + {NULL, 0, NULL, 0}, + }; snd_pcm_t *phandle, *chandle; char *buffer; - int err, latency; + int err, latency, morehelp; int size, ok; snd_timestamp_t p_tstamp, c_tstamp; ssize_t r; size_t frames_in, frames_out; + morehelp = 0; + while (1) { + int c; + if ((c = getopt_long(argc, argv, "hP:C:m:M:F:f:c:r:", long_option, NULL)) < 0) + break; + switch (c) { + case 'h': + morehelp++; + break; + case 'P': + pdevice = strdup(optarg); + break; + case 'C': + cdevice = strdup(optarg); + break; + case 'm': + err = atoi(optarg); + latency_min = err >= 4 ? err : 4; + if (latency_max < latency_min) + latency_max = latency_min; + break; + case 'M': + err = atoi(optarg); + latency_max = latency_min > err ? latency_min : err; + break; + case 'F': + format = snd_pcm_format_value(optarg); + if (format == SND_PCM_FORMAT_UNKNOWN) { + printf("Unknown format, setting to default S16_LE\n"); + format = SND_PCM_FORMAT_S16_LE; + } + break; + case 'c': + err = atoi(optarg); + channels = err >= 1 && err < 1024 ? err : 1; + break; + case 'r': + err = atoi(optarg); + rate = err >= 4000 && err < 200000 ? err : 44100; + break; + } + } + + if (morehelp) { + help(); + return 0; + } err = snd_output_stdio_attach(&output, stdout, 0); if (err < 0) { printf("Output failed: %s\n", snd_strerror(err)); @@ -319,6 +404,12 @@ int main(void) buffer = malloc((latency_max * snd_pcm_format_width(format) / 8) * 2); setscheduler(); + + printf("Playback device is %s\n", pdevice); + printf("Capture device is %s\n", cdevice); + printf("Parameters are %iHz, %s, %i channels\n", rate, snd_pcm_format_name(format), channels); + printf("Loop limit is %li frames, minimum latency = %i, maximum latency = %i\n", loop_limit, latency_min, latency_max); + if ((err = snd_pcm_open(&phandle, pdevice, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) { printf("Playback open error: %s\n", snd_strerror(err)); return 0; @@ -328,7 +419,6 @@ int main(void) return 0; } - printf("Loop limit is %li frames\n", loop_limit); while (1) { frames_in = frames_out = 0; if (setparams(phandle, chandle, &latency) < 0) |