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/*
* Copyright © 2011 Mozilla Foundation
*
* This program is made available under an ISC-style license. See the
* accompanying file LICENSE for details.
*/
/* libcubeb api/function test. Plays a simple tone. */
#include "gtest/gtest.h"
#if !defined(_XOPEN_SOURCE)
#define _XOPEN_SOURCE 600
#endif
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <memory>
#include <limits.h>
#include "cubeb/cubeb.h"
#include "common.h"
#include <atomic>
#define SAMPLE_FREQUENCY 48000
#define STREAM_FORMAT CUBEB_SAMPLE_S16LE
/* store the phase of the generated waveform */
struct cb_user_data {
std::atomic<long> position;
};
long data_cb_tone(cubeb_stream *stream, void *user, const void* /*inputbuffer*/, void *outputbuffer, long nframes)
{
struct cb_user_data *u = (struct cb_user_data *)user;
short *b = (short *)outputbuffer;
float t1, t2;
int i;
if (stream == NULL || u == NULL)
return CUBEB_ERROR;
/* generate our test tone on the fly */
for (i = 0; i < nframes; i++) {
/* North American dial tone */
t1 = sin(2*M_PI*(i + u->position)*350/SAMPLE_FREQUENCY);
t2 = sin(2*M_PI*(i + u->position)*440/SAMPLE_FREQUENCY);
b[i] = (SHRT_MAX / 2) * t1;
b[i] += (SHRT_MAX / 2) * t2;
/* European dial tone */
/*
t1 = sin(2*M_PI*(i + u->position)*425/SAMPLE_FREQUENCY);
b[i] = SHRT_MAX * t1;
*/
}
/* remember our phase to avoid clicking on buffer transitions */
/* we'll still click if position overflows */
u->position += nframes;
return nframes;
}
void state_cb_tone(cubeb_stream *stream, void *user, cubeb_state state)
{
struct cb_user_data *u = (struct cb_user_data *)user;
if (stream == NULL || u == NULL)
return;
switch (state) {
case CUBEB_STATE_STARTED:
fprintf(stderr, "stream started\n"); break;
case CUBEB_STATE_STOPPED:
fprintf(stderr, "stream stopped\n"); break;
case CUBEB_STATE_DRAINED:
fprintf(stderr, "stream drained\n"); break;
default:
fprintf(stderr, "unknown stream state %d\n", state);
}
return;
}
TEST(cubeb, tone)
{
cubeb *ctx;
cubeb_stream *stream;
cubeb_stream_params params;
int r;
r = common_init(&ctx, "Cubeb tone example");
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
cleanup_cubeb_at_exit(ctx, cubeb_destroy);
params.format = STREAM_FORMAT;
params.rate = SAMPLE_FREQUENCY;
params.channels = 1;
params.layout = CUBEB_LAYOUT_MONO;
std::unique_ptr<cb_user_data> user_data(new cb_user_data());
ASSERT_TRUE(!!user_data) << "Error allocating user data";
user_data->position = 0;
r = cubeb_stream_init(ctx, &stream, "Cubeb tone (mono)", NULL, NULL, NULL, ¶ms,
4096, data_cb_tone, state_cb_tone, user_data.get());
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
cleanup_stream_at_exit(stream, cubeb_stream_destroy);
cubeb_stream_start(stream);
delay(500);
cubeb_stream_stop(stream);
ASSERT_TRUE(user_data->position.load());
}
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