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/*
* Copyright © 2016 Mozilla Foundation
*
* This program is made available under an ISC-style license. See the
* accompanying file LICENSE for details.
*/
/* libcubeb api/function test. Loops input back to output and check audio
* is flowing. */
#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 "cubeb/cubeb.h"
#include "common.h"
#include <atomic>
#define SAMPLE_FREQUENCY 48000
#define STREAM_FORMAT CUBEB_SAMPLE_FLOAT32LE
struct user_state_duplex
{
std::atomic<int> seen_audio{ 0 };
};
long data_cb_duplex(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
{
user_state_duplex * u = reinterpret_cast<user_state_duplex*>(user);
float *ib = (float *)inputbuffer;
float *ob = (float *)outputbuffer;
bool seen_audio = 1;
if (stream == NULL || inputbuffer == NULL || outputbuffer == NULL) {
return CUBEB_ERROR;
}
// Loop back: upmix the single input channel to the two output channels,
// checking if there is noise in the process.
long output_index = 0;
for (long i = 0; i < nframes; i++) {
if (ib[i] <= -1.0 && ib[i] >= 1.0) {
seen_audio = 0;
break;
}
ob[output_index] = ob[output_index + 1] = ib[i];
output_index += 2;
}
u->seen_audio |= seen_audio;
return nframes;
}
void state_cb_duplex(cubeb_stream * stream, void * /*user*/, cubeb_state state)
{
if (stream == 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, duplex)
{
cubeb *ctx;
cubeb_stream *stream;
cubeb_stream_params input_params;
cubeb_stream_params output_params;
int r;
user_state_duplex stream_state;
uint32_t latency_frames = 0;
r = common_init(&ctx, "Cubeb duplex example");
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
cleanup_cubeb_at_exit(ctx, cubeb_destroy);
/* This test needs an available input device, skip it if this host does not
* have one. */
if (!has_available_input_device(ctx)) {
return;
}
/* typical user-case: mono input, stereo output, low latency. */
input_params.format = STREAM_FORMAT;
input_params.rate = 48000;
input_params.channels = 1;
input_params.layout = CUBEB_LAYOUT_MONO;
output_params.format = STREAM_FORMAT;
output_params.rate = 48000;
output_params.channels = 2;
output_params.layout = CUBEB_LAYOUT_STEREO;
r = cubeb_get_min_latency(ctx, output_params, &latency_frames);
ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";
r = cubeb_stream_init(ctx, &stream, "Cubeb duplex",
NULL, &input_params, NULL, &output_params,
latency_frames, data_cb_duplex, state_cb_duplex, &stream_state);
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(stream_state.seen_audio.load());
}
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