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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.
*/
/* cubeb_logging test */
#include "gtest/gtest.h"
#if !defined(_XOPEN_SOURCE)
#define _XOPEN_SOURCE 600
#endif
#include "cubeb/cubeb.h"
#include "cubeb_log.h"
#include <atomic>
#include <math.h>
#include <memory>
#include <stdio.h>
#include <stdlib.h>
#include <thread>
#include "common.h"
#define PRINT_LOGS_TO_STDERR 0
std::atomic<uint32_t> log_statements_received = {0};
std::atomic<uint32_t> data_callback_call_count = {0};
static void
test_logging_callback(char const * fmt, ...)
{
log_statements_received++;
#if PRINT_LOGS_TO_STDERR == 1
char buf[1024];
va_list argslist;
va_start(argslist, fmt);
vsnprintf(buf, 1024, fmt, argslist);
fprintf(stderr, "%s\n", buf);
va_end(argslist);
#endif // PRINT_LOGS_TO_STDERR
}
static long
data_cb_load(cubeb_stream * stream, void * user, const void * inputbuffer,
void * outputbuffer, long nframes)
{
data_callback_call_count++;
return nframes;
}
static void
state_cb(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;
}
// Waits for at least one audio callback to have occured.
void
wait_for_audio_callback()
{
uint32_t audio_callback_index =
data_callback_call_count.load(std::memory_order_acquire);
while (audio_callback_index ==
data_callback_call_count.load(std::memory_order_acquire)) {
delay(100);
}
}
TEST(cubeb, logging)
{
cubeb * ctx;
cubeb_stream * stream;
cubeb_stream_params output_params;
int r;
uint32_t latency_frames = 0;
cubeb_set_log_callback(CUBEB_LOG_NORMAL, test_logging_callback);
r = common_init(&ctx, "Cubeb logging test");
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
std::unique_ptr<cubeb, decltype(&cubeb_destroy)> cleanup_cubeb_at_exit(
ctx, cubeb_destroy);
output_params.format = CUBEB_SAMPLE_FLOAT32LE;
output_params.rate = 48000;
output_params.channels = 2;
output_params.layout = CUBEB_LAYOUT_STEREO;
output_params.prefs = CUBEB_STREAM_PREF_NONE;
r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);
if (r != CUBEB_OK) {
// not fatal
latency_frames = 1024;
}
r = cubeb_stream_init(ctx, &stream, "Cubeb logging", NULL, NULL, NULL,
&output_params, latency_frames, data_cb_load, state_cb,
NULL);
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);
ASSERT_NE(log_statements_received.load(std::memory_order_acquire), 0u);
cubeb_set_log_callback(CUBEB_LOG_DISABLED, nullptr);
log_statements_received.store(0, std::memory_order_release);
// This is synchronous and we'll receive log messages on all backends that we
// test
cubeb_stream_start(stream);
ASSERT_EQ(log_statements_received.load(std::memory_order_acquire), 0u);
cubeb_set_log_callback(CUBEB_LOG_VERBOSE, test_logging_callback);
wait_for_audio_callback();
ASSERT_NE(log_statements_received.load(std::memory_order_acquire), 0u);
bool log_callback_set = true;
uint32_t iterations = 100;
while (iterations--) {
wait_for_audio_callback();
if (!log_callback_set) {
ASSERT_EQ(log_statements_received.load(std::memory_order_acquire), 0u);
// Set a logging callback, start logging
cubeb_set_log_callback(CUBEB_LOG_VERBOSE, test_logging_callback);
log_callback_set = true;
} else {
// Disable the logging callback, stop logging.
ASSERT_NE(log_statements_received.load(std::memory_order_acquire), 0u);
cubeb_set_log_callback(CUBEB_LOG_DISABLED, nullptr);
log_statements_received.store(0, std::memory_order_release);
// Disabling logging should flush any log message -- wait a bit and check
// that this is true.
ASSERT_EQ(log_statements_received.load(std::memory_order_acquire), 0u);
log_callback_set = false;
}
}
cubeb_stream_stop(stream);
}
TEST(cubeb, logging_stress)
{
cubeb_set_log_callback(CUBEB_LOG_NORMAL, test_logging_callback);
std::atomic<bool> thread_done = {false};
auto t = std::thread([&thread_done]() {
uint32_t count = 0;
do {
while (rand() % 10) {
ALOG("Log message #%d!", count++);
}
} while (count < 1e4);
thread_done.store(true);
});
bool enabled = true;
while (!thread_done.load()) {
if (enabled) {
cubeb_set_log_callback(CUBEB_LOG_DISABLED, nullptr);
enabled = false;
} else {
cubeb_set_log_callback(CUBEB_LOG_NORMAL, test_logging_callback);
enabled = true;
}
}
cubeb_set_log_callback(CUBEB_LOG_DISABLED, nullptr);
t.join();
ASSERT_TRUE(true);
}
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