1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <gtest/gtest.h>
18 
19 #include <chrono>
20 #include <cstdint>
21 #include <future>
22 #include <string>
23 
24 #include "common/time_util.h"
25 #include "osi/include/allocator.h"
26 #include "stack/include/a2dp_vendor_opus.h"
27 #include "stack/include/a2dp_vendor_opus_constants.h"
28 #include "stack/include/bt_hdr.h"
29 #include "test_util.h"
30 #include "wav_reader.h"
31 
32 namespace {
33 constexpr uint32_t kA2dpTickUs = 23 * 1000;
34 constexpr char kWavFile[] = "test/a2dp/raw_data/pcm1644s.wav";
35 const uint8_t kCodecInfoOpusCapability[AVDT_CODEC_SIZE] = {
36         A2DP_OPUS_CODEC_LEN,         // Length
37         AVDT_MEDIA_TYPE_AUDIO << 4,  // Media Type
38         A2DP_MEDIA_CT_NON_A2DP,      // Media Codec Type Vendor
39         (A2DP_OPUS_VENDOR_ID & 0x000000FF),
40         (A2DP_OPUS_VENDOR_ID & 0x0000FF00) >> 8,
41         (A2DP_OPUS_VENDOR_ID & 0x00FF0000) >> 16,
42         (A2DP_OPUS_VENDOR_ID & 0xFF000000) >> 24,
43         (A2DP_OPUS_CODEC_ID & 0x00FF),
44         (A2DP_OPUS_CODEC_ID & 0xFF00) >> 8,
45         A2DP_OPUS_CHANNEL_MODE_STEREO | A2DP_OPUS_20MS_FRAMESIZE | A2DP_OPUS_SAMPLING_FREQ_48000};
Data(BT_HDR * packet)46 uint8_t* Data(BT_HDR* packet) { return packet->data + packet->offset; }
47 
GetReadSize()48 uint32_t GetReadSize() {
49   return A2DP_VendorGetFrameSizeOpus(kCodecInfoOpusCapability) *
50          A2DP_VendorGetTrackChannelCountOpus(kCodecInfoOpusCapability) *
51          (A2DP_VendorGetTrackBitsPerSampleOpus(kCodecInfoOpusCapability) / 8);
52 }
53 }  // namespace
54 
55 namespace bluetooth {
56 namespace testing {
57 
58 static BT_HDR* packet = nullptr;
59 static WavReader wav_reader = WavReader(GetWavFilePath(kWavFile).c_str());
60 static std::promise<void> promise;
61 
62 class A2dpOpusTest : public ::testing::Test {
63 protected:
SetUp()64   void SetUp() override {
65     SetCodecConfig();
66     encoder_iface_ = const_cast<tA2DP_ENCODER_INTERFACE*>(
67             A2DP_VendorGetEncoderInterfaceOpus(kCodecInfoOpusCapability));
68     ASSERT_NE(encoder_iface_, nullptr);
69     decoder_iface_ = const_cast<tA2DP_DECODER_INTERFACE*>(
70             A2DP_VendorGetDecoderInterfaceOpus(kCodecInfoOpusCapability));
71     ASSERT_NE(decoder_iface_, nullptr);
72   }
73 
TearDown()74   void TearDown() override {
75     if (a2dp_codecs_ != nullptr) {
76       delete a2dp_codecs_;
77     }
78     if (encoder_iface_ != nullptr) {
79       encoder_iface_->encoder_cleanup();
80     }
81     if (decoder_iface_ != nullptr) {
82       decoder_iface_->decoder_cleanup();
83     }
84   }
85 
SetCodecConfig()86   void SetCodecConfig() {
87     uint8_t codec_info_result[AVDT_CODEC_SIZE];
88     btav_a2dp_codec_index_t peer_codec_index;
89     a2dp_codecs_ = new A2dpCodecs(std::vector<btav_a2dp_codec_config_t>());
90 
91     ASSERT_TRUE(a2dp_codecs_->init());
92 
93     // Create the codec capability - SBC Sink
94     memset(codec_info_result, 0, sizeof(codec_info_result));
95     peer_codec_index = A2DP_SinkCodecIndex(kCodecInfoOpusCapability);
96     ASSERT_NE(peer_codec_index, BTAV_A2DP_CODEC_INDEX_MAX);
97     codec_config_ = a2dp_codecs_->findSinkCodecConfig(kCodecInfoOpusCapability);
98     ASSERT_NE(codec_config_, nullptr);
99     ASSERT_TRUE(a2dp_codecs_->setSinkCodecConfig(kCodecInfoOpusCapability, true, codec_info_result,
100                                                  true));
101     ASSERT_EQ(a2dp_codecs_->getCurrentCodecConfig(), codec_config_);
102     // Compare the result codec with the local test codec info
103     for (size_t i = 0; i < kCodecInfoOpusCapability[0] + 1; i++) {
104       ASSERT_EQ(codec_info_result[i], kCodecInfoOpusCapability[i]);
105     }
106     ASSERT_EQ(codec_config_->getAudioBitsPerSample(), 16);
107   }
108 
InitializeEncoder(a2dp_source_read_callback_t read_cb,a2dp_source_enqueue_callback_t enqueue_cb)109   void InitializeEncoder(a2dp_source_read_callback_t read_cb,
110                          a2dp_source_enqueue_callback_t enqueue_cb) {
111     tA2DP_ENCODER_INIT_PEER_PARAMS peer_params = {true, true, 1000};
112     encoder_iface_->encoder_init(&peer_params, codec_config_, read_cb, enqueue_cb);
113   }
114 
InitializeDecoder(decoded_data_callback_t data_cb)115   void InitializeDecoder(decoded_data_callback_t data_cb) { decoder_iface_->decoder_init(data_cb); }
116 
AllocateL2capPacket(const std::vector<uint8_t> data) const117   BT_HDR* AllocateL2capPacket(const std::vector<uint8_t> data) const {
118     auto packet = AllocatePacket(data.size());
119     std::copy(data.cbegin(), data.cend(), Data(packet));
120     return packet;
121   }
122 
AllocatePacket(size_t packet_length) const123   BT_HDR* AllocatePacket(size_t packet_length) const {
124     BT_HDR* packet = static_cast<BT_HDR*>(osi_calloc(sizeof(BT_HDR) + packet_length));
125     packet->len = packet_length;
126     return packet;
127   }
128   A2dpCodecConfig* codec_config_;
129   A2dpCodecs* a2dp_codecs_;
130   tA2DP_ENCODER_INTERFACE* encoder_iface_;
131   tA2DP_DECODER_INTERFACE* decoder_iface_;
132 };
133 
TEST_F(A2dpOpusTest,a2dp_source_read_underflow)134 TEST_F(A2dpOpusTest, a2dp_source_read_underflow) {
135   promise = {};
136   auto read_cb = +[](uint8_t* /*p_buf*/, uint32_t /*len*/) -> uint32_t {
137     // underflow
138     return 0;
139   };
140   auto enqueue_cb = +[](BT_HDR* p_buf, size_t /*frames_n*/, uint32_t /*len*/) -> bool {
141     promise.set_value();
142     osi_free(p_buf);
143     return false;
144   };
145   InitializeEncoder(read_cb, enqueue_cb);
146   uint64_t timestamp_us = bluetooth::common::time_gettimeofday_us();
147   encoder_iface_->send_frames(timestamp_us);
148   usleep(kA2dpTickUs);
149   timestamp_us = bluetooth::common::time_gettimeofday_us();
150   encoder_iface_->send_frames(timestamp_us);
151   ASSERT_EQ(promise.get_future().wait_for(std::chrono::milliseconds(10)),
152             std::future_status::timeout);
153 }
154 
TEST_F(A2dpOpusTest,a2dp_enqueue_cb_is_invoked)155 TEST_F(A2dpOpusTest, a2dp_enqueue_cb_is_invoked) {
156   promise = {};
157   auto read_cb = +[](uint8_t* /*p_buf*/, uint32_t len) -> uint32_t {
158     log::assert_that(GetReadSize() == len, "assert failed: GetReadSize() == len");
159     return len;
160   };
161   auto enqueue_cb = +[](BT_HDR* p_buf, size_t /*frames_n*/, uint32_t /*len*/) -> bool {
162     static bool first_invocation = true;
163     if (first_invocation) {
164       promise.set_value();
165     }
166     first_invocation = false;
167     osi_free(p_buf);
168     return false;
169   };
170   InitializeEncoder(read_cb, enqueue_cb);
171   uint64_t timestamp_us = bluetooth::common::time_gettimeofday_us();
172   encoder_iface_->send_frames(timestamp_us);
173   usleep(kA2dpTickUs);
174   timestamp_us = bluetooth::common::time_gettimeofday_us();
175   encoder_iface_->send_frames(timestamp_us);
176   promise.get_future().wait();
177 }
178 
TEST_F(A2dpOpusTest,decoded_data_cb_not_invoked_when_empty_packet)179 TEST_F(A2dpOpusTest, decoded_data_cb_not_invoked_when_empty_packet) {
180   auto data_cb = +[](uint8_t* /*p_buf*/, uint32_t /*len*/) { FAIL(); };
181   InitializeDecoder(data_cb);
182   std::vector<uint8_t> data;
183   BT_HDR* packet = AllocateL2capPacket(data);
184   decoder_iface_->decode_packet(packet);
185   osi_free(packet);
186 }
187 
TEST_F(A2dpOpusTest,decoded_data_cb_invoked)188 TEST_F(A2dpOpusTest, decoded_data_cb_invoked) {
189   promise = {};
190   auto data_cb = +[](uint8_t* /*p_buf*/, uint32_t /*len*/) {};
191   InitializeDecoder(data_cb);
192 
193   auto read_cb = +[](uint8_t* p_buf, uint32_t len) -> uint32_t {
194     static uint32_t counter = 0;
195     memcpy(p_buf, wav_reader.GetSamples() + counter, len);
196     counter += len;
197     return len;
198   };
199   auto enqueue_cb = +[](BT_HDR* p_buf, size_t frames_n, uint32_t /*len*/) -> bool {
200     static bool first_invocation = true;
201     if (first_invocation) {
202       packet = reinterpret_cast<BT_HDR*>(osi_malloc(sizeof(*p_buf) + p_buf->len + 1));
203       memcpy(packet, p_buf, sizeof(*p_buf));
204       packet->offset = 0;
205       memcpy(packet->data + 1, p_buf->data + p_buf->offset, p_buf->len);
206       packet->data[0] = frames_n;
207       p_buf->len += 1;
208       promise.set_value();
209     }
210     first_invocation = false;
211     osi_free(p_buf);
212     return false;
213   };
214   InitializeEncoder(read_cb, enqueue_cb);
215 
216   uint64_t timestamp_us = bluetooth::common::time_gettimeofday_us();
217   encoder_iface_->send_frames(timestamp_us);
218 
219   promise.get_future().wait();
220   decoder_iface_->decode_packet(packet);
221   osi_free(packet);
222 }
223 
224 }  // namespace testing
225 }  // namespace bluetooth
226