1 /* pcm_in_test.c
2 **
3 ** Copyright 2020, The Android Open Source Project
4 **
5 ** Redistribution and use in source and binary forms, with or without
6 ** modification, are permitted provided that the following conditions are met:
7 ** * Redistributions of source code must retain the above copyright
8 ** notice, this list of conditions and the following disclaimer.
9 ** * Redistributions in binary form must reproduce the above copyright
10 ** notice, this list of conditions and the following disclaimer in the
11 ** documentation and/or other materials provided with the distribution.
12 ** * Neither the name of The Android Open Source Project nor the names of
13 ** its contributors may be used to endorse or promote products derived
14 ** from this software without specific prior written permission.
15 **
16 ** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
17 ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 ** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
20 ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 ** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
26 ** DAMAGE.
27 */
28 #include "pcm_test_device.h"
29
30 #include <chrono>
31 #include <cstring>
32 #include <iostream>
33
34 #include <gtest/gtest.h>
35
36 #include "tinyalsa/pcm.h"
37
38 namespace tinyalsa {
39 namespace testing {
40
41 class PcmInTest : public ::testing::Test {
42 protected:
PcmInTest()43 PcmInTest() : pcm_object(nullptr) {}
44 virtual ~PcmInTest() = default;
45
SetUp()46 virtual void SetUp() override {
47 pcm_object = pcm_open(kLoopbackCard, kLoopbackCaptureDevice, PCM_IN, &kDefaultConfig);
48 ASSERT_NE(pcm_object, nullptr);
49 ASSERT_TRUE(pcm_is_ready(pcm_object));
50 }
51
TearDown()52 virtual void TearDown() override {
53 ASSERT_EQ(pcm_close(pcm_object), 0);
54 }
55
56 static constexpr unsigned int kDefaultChannels = 2;
57 static constexpr unsigned int kDefaultSamplingRate = 48000;
58 static constexpr unsigned int kDefaultPeriodSize = 1024;
59 static constexpr unsigned int kDefaultPeriodCount = 3;
60 static constexpr pcm_config kDefaultConfig = {
61 .channels = kDefaultChannels,
62 .rate = kDefaultSamplingRate,
63 .period_size = kDefaultPeriodSize,
64 .period_count = kDefaultPeriodCount,
65 .format = PCM_FORMAT_S16_LE,
66 .start_threshold = 0,
67 .stop_threshold = 0,
68 .silence_threshold = 0,
69 .silence_size = 0,
70 };
71
72 pcm* pcm_object;
73 };
74
TEST_F(PcmInTest,GetDelay)75 TEST_F(PcmInTest, GetDelay) {
76 pcm_prepare(pcm_object);
77 long delay = pcm_get_delay(pcm_object);
78 std::cout << delay << std::endl;
79 ASSERT_GE(delay, 0);
80 }
81
TEST_F(PcmInTest,Readi)82 TEST_F(PcmInTest, Readi) {
83 constexpr uint32_t read_count = 20;
84
85 size_t buffer_size = pcm_frames_to_bytes(pcm_object, kDefaultConfig.period_size);
86 auto buffer = std::make_unique<char[]>(buffer_size);
87
88 int read_frames = 0;
89 unsigned int frames = pcm_bytes_to_frames(pcm_object, buffer_size);
90 auto start = std::chrono::steady_clock::now();
91 for (uint32_t i = 0; i < read_count; ++i) {
92 read_frames = pcm_readi(pcm_object, buffer.get(), frames);
93 ASSERT_EQ(read_frames, frames);
94 }
95
96 std::chrono::duration<double> difference = std::chrono::steady_clock::now() - start;
97 std::chrono::milliseconds expected_elapsed_time_ms(frames * read_count /
98 (kDefaultConfig.rate / 1000));
99
100 std::cout << difference.count() << std::endl;
101 std::cout << expected_elapsed_time_ms.count() << std::endl;
102
103 ASSERT_NEAR(difference.count() * 1000, expected_elapsed_time_ms.count(), 100);
104 }
105
TEST_F(PcmInTest,Writei)106 TEST_F(PcmInTest, Writei) {
107 size_t buffer_size = pcm_frames_to_bytes(pcm_object, kDefaultConfig.period_size);
108 auto buffer = std::make_unique<char[]>(buffer_size);
109
110 unsigned int frames = pcm_bytes_to_frames(pcm_object, buffer_size);
111 ASSERT_EQ(pcm_writei(pcm_object, buffer.get(), frames), -EINVAL);
112 }
113
114 } // namespace testing
115 } // namespace tinyalsa
116