1 /* 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_CHECKSUM_H_ 12 #define MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_CHECKSUM_H_ 13 14 #include <memory> 15 #include <string> 16 17 #include "modules/audio_coding/neteq/tools/audio_sink.h" 18 #include "rtc_base/buffer.h" 19 #include "rtc_base/message_digest.h" 20 #include "rtc_base/string_encode.h" 21 #include "rtc_base/system/arch.h" 22 23 namespace webrtc { 24 namespace test { 25 26 class AudioChecksum : public AudioSink { 27 public: AudioChecksum()28 AudioChecksum() 29 : checksum_(rtc::MessageDigestFactory::Create(rtc::DIGEST_MD5)), 30 checksum_result_(checksum_->Size()), 31 finished_(false) {} 32 33 AudioChecksum(const AudioChecksum&) = delete; 34 AudioChecksum& operator=(const AudioChecksum&) = delete; 35 WriteArray(const int16_t * audio,size_t num_samples)36 bool WriteArray(const int16_t* audio, size_t num_samples) override { 37 if (finished_) 38 return false; 39 40 #ifndef WEBRTC_ARCH_LITTLE_ENDIAN 41 #error "Big-endian gives a different checksum" 42 #endif 43 checksum_->Update(audio, num_samples * sizeof(*audio)); 44 return true; 45 } 46 47 // Finalizes the computations, and returns the checksum. Finish()48 std::string Finish() { 49 if (!finished_) { 50 finished_ = true; 51 checksum_->Finish(checksum_result_.data(), checksum_result_.size()); 52 } 53 return rtc::hex_encode(checksum_result_); 54 } 55 56 private: 57 std::unique_ptr<rtc::MessageDigest> checksum_; 58 rtc::Buffer checksum_result_; 59 bool finished_; 60 }; 61 62 } // namespace test 63 } // namespace webrtc 64 #endif // MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_CHECKSUM_H_ 65