--- /dev/null
+/*
+ * Copyright (C) 2000-2004 James Courtier-Dutton
+ *
+ * This file is part of the speaker-test tool.
+ *
+ * This small program sends a simple sinusoidal wave to your speakers.
+ *
+ * speaker-test is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * xine is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ *
+ * Main program by James Courtier-Dutton (including some source code fragments from the alsa project.)
+ * Some cleanup from Daniel Caujolle-Bert <segfault@club-internet.fr>
+ *
+ * $Id: speaker_test.c,v 1.00 2003/11/26 19:43:38 jcdutton Exp $
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sched.h>
+#include <errno.h>
+#include <getopt.h>
+#include "aconfig.h"
+
+#include <alsa/asoundlib.h>
+#include <sys/time.h>
+#include <math.h>
+
+static char *device = "plughw:0,0"; /* playback device */
+static snd_pcm_format_t format = SND_PCM_FORMAT_S16; /* sample format */
+static unsigned int rate = 44100; /* stream rate */
+static unsigned int channels = 1; /* count of channels */
+static unsigned int buffer_time = 500000; /* ring buffer length in us */
+static unsigned int period_time = 100000; /* period time in us */
+static double freq = 440; /* sinusoidal wave frequency in Hz */
+static snd_output_t *output = NULL;
+static snd_pcm_uframes_t buffer_size;
+static snd_pcm_uframes_t period_size;
+static const char *channel_name[] = {
+ "Front Left" ,
+ "Front Right" ,
+ "Rear Left" ,
+ "Rear Right" ,
+ "Center" ,
+ "LFE"
+};
+
+static void generate_sine(signed short *samples, int channel, int count, double *_phase) {
+ double phase = *_phase;
+ double max_phase = 1.0 / freq;
+ double step = 1.0 / (double)rate;
+ double res;
+ int chn, ires;
+
+ while (count-- > 0) {
+ res = sin((phase * 2 * M_PI) / max_phase - M_PI) * 32767;
+ /* printf("%e\n",res); */
+ ires = res;
+
+ for(chn=0;chn<channels;chn++) {
+ if (chn==channel)
+ *samples++ = ires;
+ else
+ *samples++ = 0;
+ }
+
+ phase += step;
+ if (phase >= max_phase)
+ phase -= max_phase;
+ }
+
+ *_phase = phase;
+}
+
+/* FIXME: Implement, because it is a better test than sine wave
+ * because we can tell where pink noise is coming from more easily that a sine wave
+ */
+#if 0
+static void generate_pink_noise( snd_pcm_uframes_t offset, int count, double *_phase) {
+}
+#endif
+
+static int set_hwparams(snd_pcm_t *handle, snd_pcm_hw_params_t *params, snd_pcm_access_t access) {
+ unsigned int rrate;
+ int err, dir;
+ snd_pcm_uframes_t period_size_min;
+ snd_pcm_uframes_t period_size_max;
+ snd_pcm_uframes_t buffer_size_min;
+ snd_pcm_uframes_t buffer_size_max;
+ snd_pcm_uframes_t buffer_time_to_size;
+
+
+
+ /* choose all parameters */
+ err = snd_pcm_hw_params_any(handle, params);
+ if (err < 0) {
+ printf("Broken configuration for playback: no configurations available: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* set the interleaved read/write format */
+ err = snd_pcm_hw_params_set_access(handle, params, access);
+ if (err < 0) {
+ printf("Access type not available for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* set the sample format */
+ err = snd_pcm_hw_params_set_format(handle, params, format);
+ if (err < 0) {
+ printf("Sample format not available for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* set the count of channels */
+ err = snd_pcm_hw_params_set_channels(handle, params, channels);
+ if (err < 0) {
+ printf("Channels count (%i) not available for playbacks: %s\n", channels, snd_strerror(err));
+ return err;
+ }
+
+ /* set the stream rate */
+ rrate = rate;
+ err = snd_pcm_hw_params_set_rate(handle, params, rate, 0);
+ if (err < 0) {
+ printf("Rate %iHz not available for playback: %s\n", rate, snd_strerror(err));
+ return err;
+ }
+
+ if (rrate != rate) {
+ printf("Rate doesn't match (requested %iHz, get %iHz, err %d)\n", rate, rrate, err);
+ return -EINVAL;
+ }
+
+ printf("Rate set to %iHz (requested %iHz)\n", rrate, rate);
+ /* set the buffer time */
+ buffer_time_to_size = ( (snd_pcm_uframes_t)buffer_time * rate) / 1000000;
+ err = snd_pcm_hw_params_get_buffer_size_min(params, &buffer_size_min);
+ err = snd_pcm_hw_params_get_buffer_size_max(params, &buffer_size_max);
+ dir=0;
+ err = snd_pcm_hw_params_get_period_size_min(params, &period_size_min,&dir);
+ dir=0;
+ err = snd_pcm_hw_params_get_period_size_max(params, &period_size_max,&dir);
+ printf("Buffer size range from %lu to %lu\n",buffer_size_min, buffer_size_max);
+ printf("Period size range from %lu to %lu\n",period_size_min, period_size_max);
+ printf("Buffer time size %lu\n",buffer_time_to_size);
+
+ buffer_size = buffer_time_to_size;
+ if (buffer_size_max < buffer_size) buffer_size = buffer_size_max;
+ if (buffer_size_min > buffer_size) buffer_size = buffer_size_min;
+ period_size=buffer_size/8;
+ buffer_size = period_size*8;
+ printf("To choose buffer_size = %lu\n",buffer_size);
+ printf("To choose period_size = %lu\n",period_size);
+ dir=0;
+ err = snd_pcm_hw_params_set_period_size_near(handle, params, &period_size, &dir);
+ if (err < 0) {
+ printf("Unable to set period size %lu for playback: %s\n", period_size, snd_strerror(err));
+ return err;
+ }
+ dir=0;
+ err = snd_pcm_hw_params_get_period_size(params, &period_size, &dir);
+ if (err < 0) printf("Unable to get period size for playback: %s\n", snd_strerror(err));
+
+ dir=0;
+ err = snd_pcm_hw_params_set_buffer_size_near(handle, params, &buffer_size);
+ if (err < 0) {
+ printf("Unable to set buffer size %lu for playback: %s\n", buffer_size, snd_strerror(err));
+ return err;
+ }
+ err = snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
+ printf("was set period_size = %lu\n",period_size);
+ printf("was set buffer_size = %lu\n",buffer_size);
+ if (2*period_size > buffer_size) {
+ printf("buffer to small, could not use\n");
+ return err;
+ }
+
+
+ /* write the parameters to device */
+ err = snd_pcm_hw_params(handle, params);
+ if (err < 0) {
+ printf("Unable to set hw params for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ return 0;
+}
+
+static int set_swparams(snd_pcm_t *handle, snd_pcm_sw_params_t *swparams) {
+ int err;
+
+ /* get the current swparams */
+ err = snd_pcm_sw_params_current(handle, swparams);
+ if (err < 0) {
+ printf("Unable to determine current swparams for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* start the transfer when a period is full */
+ err = snd_pcm_sw_params_set_start_threshold(handle, swparams, period_size);
+ if (err < 0) {
+ printf("Unable to set start threshold mode for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* allow the transfer when at least period_size samples can be processed */
+ err = snd_pcm_sw_params_set_avail_min(handle, swparams, period_size);
+ if (err < 0) {
+ printf("Unable to set avail min for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* align all transfers to 1 sample */
+ err = snd_pcm_sw_params_set_xfer_align(handle, swparams, 1);
+ if (err < 0) {
+ printf("Unable to set transfer align for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ /* write the parameters to the playback device */
+ err = snd_pcm_sw_params(handle, swparams);
+ if (err < 0) {
+ printf("Unable to set sw params for playback: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ return 0;
+}
+
+/*
+ * Underrun and suspend recovery
+ */
+
+static int xrun_recovery(snd_pcm_t *handle, int err) {
+ if (err == -EPIPE) { /* under-run */
+ err = snd_pcm_prepare(handle);
+ if (err < 0)
+ printf("Can't recovery from underrun, prepare failed: %s\n", snd_strerror(err));
+ return 0;
+ }
+ else if (err == -ESTRPIPE) {
+
+ while ((err = snd_pcm_resume(handle)) == -EAGAIN)
+ sleep(1); /* wait until the suspend flag is released */
+
+ if (err < 0) {
+ err = snd_pcm_prepare(handle);
+ if (err < 0)
+ printf("Can't recovery from suspend, prepare failed: %s\n", snd_strerror(err));
+ }
+
+ return 0;
+ }
+
+ return err;
+}
+
+/*
+ * Transfer method - write only
+ */
+
+static int write_loop(snd_pcm_t *handle, int channel, int periods, signed short *samples) {
+ double phase = 0;
+ signed short *ptr;
+ int err, cptr, n;
+
+ for(n = 0; n < periods; n++) {
+
+ generate_sine(samples, channel, period_size, &phase);
+ ptr = samples;
+ cptr = period_size;
+
+ while (cptr > 0) {
+
+ err = snd_pcm_writei(handle, ptr, cptr);
+
+ if (err == -EAGAIN)
+ continue;
+
+ if (err < 0) {
+ if (xrun_recovery(handle, err) < 0) {
+ printf("Write error: %s\n", snd_strerror(err));
+ return -1;
+ }
+ break; /* skip one period */
+ }
+
+ ptr += (err * channels);
+ cptr -= err;
+ }
+ }
+
+ return 0;
+}
+
+static void help(void) {
+ int k;
+
+ printf(
+ "Usage: latency [OPTION]... [FILE]...\n"
+ "-h,--help help\n"
+ "-D,--device playback device\n"
+ "-r,--rate stream rate in Hz\n"
+ "-c,--channels count of channels in stream\n"
+ "-f,--frequency sine wave frequency in Hz\n"
+ "-b,--buffer ring buffer size in us\n"
+ "-p,--period period size in us\n"
+ "\n");
+
+ printf("Recognized sample formats are:");
+ for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) {
+ const char *s = snd_pcm_format_name(k);
+ if (s)
+ printf(" %s", s);
+ }
+
+ printf("\n\n");
+}
+
+int main(int argc, char *argv[]) {
+ snd_pcm_t *handle;
+ int err, morehelp;
+ snd_pcm_hw_params_t *hwparams;
+ snd_pcm_sw_params_t *swparams;
+ signed short *samples;
+ int chn;
+ struct option long_option[] = {
+ {"help", 0, NULL, 'h'},
+ {"device", 1, NULL, 'D'},
+ {"rate", 1, NULL, 'r'},
+ {"channels", 1, NULL, 'c'},
+ {"frequency", 1, NULL, 'f'},
+ {"buffer", 1, NULL, 'b'},
+ {"period", 1, NULL, 'p'},
+ {NULL, 0, NULL, 0 },
+ };
+
+ snd_pcm_hw_params_alloca(&hwparams);
+ snd_pcm_sw_params_alloca(&swparams);
+
+ morehelp = 0;
+
+ printf("\nspeaker-test %s\n\n",VERSION);
+ while (1) {
+ int c;
+
+ if ((c = getopt_long(argc, argv, "hD:r:c:f:b:p:m:", long_option, NULL)) < 0)
+ break;
+
+ switch (c) {
+ case 'h':
+ morehelp++;
+ break;
+ case 'D':
+ device = strdup(optarg);
+ break;
+ case 'r':
+ rate = atoi(optarg);
+ rate = rate < 4000 ? 4000 : rate;
+ rate = rate > 196000 ? 196000 : rate;
+ break;
+ case 'c':
+ channels = atoi(optarg);
+ channels = channels < 1 ? 1 : channels;
+ channels = channels > 1024 ? 1024 : channels;
+ break;
+ case 'f':
+ freq = atoi(optarg);
+ freq = freq < 50 ? 50 : freq;
+ freq = freq > 5000 ? 5000 : freq;
+ break;
+ case 'b':
+ buffer_time = atoi(optarg);
+ buffer_time = buffer_time < 1000 ? 1000 : buffer_time;
+ buffer_time = buffer_time > 1000000 ? 1000000 : buffer_time;
+ break;
+ case 'p':
+ period_time = atoi(optarg);
+ period_time = period_time < 1000 ? 1000 : period_time;
+ period_time = period_time > 1000000 ? 1000000 : period_time;
+ break;
+ default:
+ printf("Unknown option '%c'\n", c);
+ exit(EXIT_FAILURE);
+ break;
+ }
+ }
+
+ if (morehelp) {
+ help();
+ exit(EXIT_SUCCESS);
+ }
+
+ err = snd_output_stdio_attach(&output, stdout, 0);
+ if (err < 0) {
+ printf("Output failed: %s\n", snd_strerror(err));
+ exit(EXIT_FAILURE);
+ }
+
+ printf("Playback device is %s\n", device);
+ printf("Stream parameters are %iHz, %s, %i channels\n", rate, snd_pcm_format_name(format), channels);
+ printf("Sine wave rate is %.4fHz\n", freq);
+
+ if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
+ printf("Playback open error: %s\n", snd_strerror(err));
+ exit(EXIT_FAILURE);
+ }
+
+ if ((err = set_hwparams(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
+ printf("Setting of hwparams failed: %s\n", snd_strerror(err));
+ exit(EXIT_FAILURE);
+ }
+ if ((err = set_swparams(handle, swparams)) < 0) {
+ printf("Setting of swparams failed: %s\n", snd_strerror(err));
+ exit(EXIT_FAILURE);
+ }
+
+ samples = malloc((period_size * channels * snd_pcm_format_width(format)) / 8);
+ if (samples == NULL) {
+ printf("No enough memory\n");
+ exit(EXIT_FAILURE);
+ }
+
+ while (1) {
+
+ for(chn = 0; chn < channels; chn++) {
+ printf(" - %s\n", channel_name[chn]);
+
+ err = write_loop(handle, chn, ((rate*5)/period_size), samples);
+
+ if (err < 0) {
+ printf("Transfer failed: %s\n", snd_strerror(err));
+ exit(EXIT_FAILURE);
+ }
+ }
+ }
+
+ free(samples);
+ snd_pcm_close(handle);
+
+ exit(EXIT_SUCCESS);
+}
OSDN Git Service
