1 /* pcm_out_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
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25 ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
26 ** DAMAGE.
27 */
28 
29 #include <cstdio>
30 #include <fstream>
31 #include <iostream>
32 #include <memory>
33 #include <string_view>
34 #include <string>
35 #include <thread>
36 
37 #include <gtest/gtest.h>
38 
39 #include "tinyalsa/pcm.h"
40 
41 #include "pcm_test_device.h"
42 
43 namespace tinyalsa {
44 namespace testing {
45 
TEST(PcmTest,FormatToBits)46 TEST(PcmTest, FormatToBits) {
47     // FIXME: Should we return 16 bits for INVALID?
48     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_INVALID), 16);
49 
50     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S16_LE), 16);
51     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S32_LE), 32);
52     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S8), 8);
53     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S24_LE), 32);
54     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S24_3LE), 24);
55     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S16_BE), 16);
56     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S24_BE), 32);
57     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S24_3BE), 24);
58     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_S32_BE), 32);
59     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_FLOAT_LE), 32);
60     ASSERT_EQ(pcm_format_to_bits(PCM_FORMAT_FLOAT_BE), 32);
61 }
62 
TEST(PcmTest,OpenAndCloseOutPcm)63 TEST(PcmTest, OpenAndCloseOutPcm) {
64     pcm *pcm_object = pcm_open(1000, 1000, PCM_OUT, &kDefaultConfig);
65     ASSERT_FALSE(pcm_is_ready(pcm_object));
66     ASSERT_EQ(pcm_close(pcm_object), 0);
67 
68     // assume card 0, device 0 is always available
69     pcm_object = pcm_open(0, 0, PCM_OUT, &kDefaultConfig);
70     ASSERT_TRUE(pcm_is_ready(pcm_object));
71     ASSERT_EQ(pcm_close(pcm_object), 0);
72 
73     pcm_object = pcm_open(0, 0, PCM_OUT | PCM_MMAP, &kDefaultConfig);
74     ASSERT_TRUE(pcm_is_ready(pcm_object));
75     ASSERT_EQ(pcm_close(pcm_object), 0);
76 
77     pcm_object = pcm_open(0, 0, PCM_OUT | PCM_MMAP | PCM_NOIRQ, &kDefaultConfig);
78     ASSERT_TRUE(pcm_is_ready(pcm_object));
79     ASSERT_EQ(pcm_close(pcm_object), 0);
80 
81     pcm_object = pcm_open(0, 0, PCM_OUT | PCM_NONBLOCK, &kDefaultConfig);
82     ASSERT_TRUE(pcm_is_ready(pcm_object));
83     ASSERT_EQ(pcm_close(pcm_object), 0);
84 
85     pcm_object = pcm_open(0, 0, PCM_OUT | PCM_MONOTONIC, &kDefaultConfig);
86     ASSERT_TRUE(pcm_is_ready(pcm_object));
87     ASSERT_EQ(pcm_close(pcm_object), 0);
88 
89     std::string name = "hw:0,0";
90     pcm_object = pcm_open_by_name(name.c_str(), PCM_OUT, &kDefaultConfig);
91     ASSERT_TRUE(pcm_is_ready(pcm_object));
92     ASSERT_EQ(pcm_close(pcm_object), 0);
93 }
94 
TEST(PcmTest,OpenWithoutBlocking)95 TEST(PcmTest, OpenWithoutBlocking) {
96     char loopback_device_info_path[120] = {};
97     snprintf(loopback_device_info_path, sizeof(loopback_device_info_path),
98             "/proc/asound/card%d/pcm%dp/info", kLoopbackCard, kLoopbackPlaybackDevice);
99 
100     std::ifstream info_file_stream{loopback_device_info_path};
101     if (!info_file_stream.is_open()) {
102         GTEST_SKIP();
103     }
104 
105     char buffer[256] = {};
106     int32_t subdevice_count = 0;
107     while (info_file_stream.good()) {
108         info_file_stream.getline(buffer, sizeof(buffer));
109         std::cout << buffer << std::endl;
110         std::string_view line{buffer};
111         if (line.find("subdevices_count") != std::string_view::npos) {
112             auto subdevice_count_string = line.substr(line.find(":") + 1);
113             std::cout << subdevice_count_string << std::endl;
114             subdevice_count = std::stoi(std::string{subdevice_count_string});
115         }
116     }
117 
118     ASSERT_GT(subdevice_count, 0);
119 
120     auto pcm_array = std::make_unique<pcm *[]>(subdevice_count);
121     std::thread *open_thread = new std::thread{[&pcm_array, subdevice_count] {
122         // Occupy all substreams
123         for (int32_t i = 0; i < subdevice_count; i++) {
124             pcm_array[i] = pcm_open(kLoopbackCard, kLoopbackPlaybackDevice, PCM_OUT,
125                     &kDefaultConfig);
126             EXPECT_TRUE(pcm_is_ready(pcm_array[i]));
127         }
128 
129         // Expect that pcm_open is not blocked in the kernel and return a bad_object pointer.
130         pcm *pcm_object = pcm_open(kLoopbackCard, kLoopbackPlaybackDevice, PCM_OUT,
131                     &kDefaultConfig);
132         if (pcm_is_ready(pcm_object)) {
133             // open_thread is blocked in kernel because of the substream is all occupied. pcm_open
134             // returns because the main thread has released all pcm structures in pcm_array. We just
135             // need to close the pcm_object here.
136             pcm_close(pcm_object);
137             return;
138         }
139 
140         // Release all substreams
141         for (int32_t i = 0; i < subdevice_count; i++) {
142             pcm_close(pcm_array[i]);
143             pcm_array[i] = nullptr;
144         }
145     }};
146 
147     static constexpr int64_t kTimeoutMs = 500;
148     std::this_thread::sleep_for(std::chrono::milliseconds(kTimeoutMs));
149     if (pcm_array[0] == nullptr) {
150         open_thread->join();
151     } else {
152         for (int32_t i = 0; i < subdevice_count; i++) {
153             pcm_close(pcm_array[i]);
154             pcm_array[i] = nullptr;
155         }
156         open_thread->join();
157         FAIL() << "The open_thread is blocked in kernel or the kTimeoutMs(" << kTimeoutMs <<
158                 ") is too short to complete";
159     }
160 }
161 
162 } // namespace testing
163 } // namespace tinyalsa
164