1 /****************************************************************************** 2 * 3 * Copyright 2017 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #include <gtest/gtest.h> 20 21 #include "audio_a2dp_hw/include/audio_a2dp_hw.h" 22 23 namespace { 24 static uint32_t codec_sample_rate2value( 25 btav_a2dp_codec_sample_rate_t codec_sample_rate) { 26 switch (codec_sample_rate) { 27 case BTAV_A2DP_CODEC_SAMPLE_RATE_44100: 28 return 44100; 29 case BTAV_A2DP_CODEC_SAMPLE_RATE_48000: 30 return 48000; 31 case BTAV_A2DP_CODEC_SAMPLE_RATE_88200: 32 return 88200; 33 case BTAV_A2DP_CODEC_SAMPLE_RATE_96000: 34 return 96000; 35 case BTAV_A2DP_CODEC_SAMPLE_RATE_176400: 36 return 176400; 37 case BTAV_A2DP_CODEC_SAMPLE_RATE_192000: 38 return 192000; 39 case BTAV_A2DP_CODEC_SAMPLE_RATE_16000: 40 return 16000; 41 case BTAV_A2DP_CODEC_SAMPLE_RATE_24000: 42 return 24000; 43 case BTAV_A2DP_CODEC_SAMPLE_RATE_NONE: 44 break; 45 } 46 return 0; 47 } 48 49 static uint32_t codec_bits_per_sample2value( 50 btav_a2dp_codec_bits_per_sample_t codec_bits_per_sample) { 51 switch (codec_bits_per_sample) { 52 case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16: 53 return 16; 54 case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_24: 55 return 24; 56 case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_32: 57 return 32; 58 case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE: 59 break; 60 } 61 return 0; 62 } 63 64 static uint32_t codec_channel_mode2value( 65 btav_a2dp_codec_channel_mode_t codec_channel_mode) { 66 switch (codec_channel_mode) { 67 case BTAV_A2DP_CODEC_CHANNEL_MODE_MONO: 68 return 1; 69 case BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO: 70 return 2; 71 case BTAV_A2DP_CODEC_CHANNEL_MODE_NONE: 72 break; 73 } 74 return 0; 75 } 76 77 } // namespace 78 79 class AudioA2dpHwTest : public ::testing::Test { 80 protected: 81 AudioA2dpHwTest() {} 82 83 private: 84 }; 85 86 TEST_F(AudioA2dpHwTest, test_compute_buffer_size) { 87 const btav_a2dp_codec_sample_rate_t codec_sample_rate_array[] = { 88 BTAV_A2DP_CODEC_SAMPLE_RATE_NONE, BTAV_A2DP_CODEC_SAMPLE_RATE_44100, 89 BTAV_A2DP_CODEC_SAMPLE_RATE_48000, BTAV_A2DP_CODEC_SAMPLE_RATE_88200, 90 BTAV_A2DP_CODEC_SAMPLE_RATE_96000, BTAV_A2DP_CODEC_SAMPLE_RATE_176400, 91 BTAV_A2DP_CODEC_SAMPLE_RATE_192000}; 92 93 const btav_a2dp_codec_bits_per_sample_t codec_bits_per_sample_array[] = { 94 BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE, BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16, 95 BTAV_A2DP_CODEC_BITS_PER_SAMPLE_24, BTAV_A2DP_CODEC_BITS_PER_SAMPLE_32}; 96 97 const btav_a2dp_codec_channel_mode_t codec_channel_mode_array[] = { 98 BTAV_A2DP_CODEC_CHANNEL_MODE_NONE, BTAV_A2DP_CODEC_CHANNEL_MODE_MONO, 99 BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO}; 100 101 for (const auto codec_sample_rate : codec_sample_rate_array) { 102 for (const auto codec_bits_per_sample : codec_bits_per_sample_array) { 103 for (const auto codec_channel_mode : codec_channel_mode_array) { 104 size_t buffer_size = audio_a2dp_hw_stream_compute_buffer_size( 105 codec_sample_rate, codec_bits_per_sample, codec_channel_mode); 106 107 // Check for invalid input 108 if ((codec_sample_rate == BTAV_A2DP_CODEC_SAMPLE_RATE_NONE) || 109 (codec_bits_per_sample == BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE) || 110 (codec_channel_mode == BTAV_A2DP_CODEC_CHANNEL_MODE_NONE)) { 111 EXPECT_EQ(buffer_size, 112 static_cast<size_t>(AUDIO_STREAM_OUTPUT_BUFFER_SZ)); 113 continue; 114 } 115 116 uint32_t sample_rate = codec_sample_rate2value(codec_sample_rate); 117 EXPECT_TRUE(sample_rate != 0); 118 119 uint32_t bits_per_sample = 120 codec_bits_per_sample2value(codec_bits_per_sample); 121 EXPECT_TRUE(bits_per_sample != 0); 122 123 uint32_t number_of_channels = 124 codec_channel_mode2value(codec_channel_mode); 125 EXPECT_TRUE(number_of_channels != 0); 126 127 const uint64_t time_period_ms = 20; // TODO: Must be a parameter 128 size_t expected_buffer_size = 129 (time_period_ms * AUDIO_STREAM_OUTPUT_BUFFER_PERIODS * sample_rate * 130 number_of_channels * (bits_per_sample / 8)) / 131 1000; 132 133 // Compute the divisor and adjust the buffer size 134 const size_t divisor = (AUDIO_STREAM_OUTPUT_BUFFER_PERIODS * 16 * 135 number_of_channels * bits_per_sample) / 136 8; 137 const size_t remainder = expected_buffer_size % divisor; 138 if (remainder != 0) { 139 expected_buffer_size += divisor - remainder; 140 } 141 142 EXPECT_EQ(buffer_size, expected_buffer_size); 143 } 144 } 145 } 146 } 147