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_CONSTANT_PCM_PACKET_SOURCE_H_ 12 #define MODULES_AUDIO_CODING_NETEQ_TOOLS_CONSTANT_PCM_PACKET_SOURCE_H_ 13 14 #include <stdio.h> 15 16 #include <string> 17 18 #include "modules/audio_coding/neteq/tools/packet_source.h" 19 #include "rtc_base/constructor_magic.h" 20 21 namespace webrtc { 22 namespace test { 23 24 // This class implements a packet source that delivers PCM16b encoded packets 25 // with a constant sample value. The payload length, constant sample value, 26 // sample rate, and payload type are all set in the constructor. 27 class ConstantPcmPacketSource : public PacketSource { 28 public: 29 ConstantPcmPacketSource(size_t payload_len_samples, 30 int16_t sample_value, 31 int sample_rate_hz, 32 int payload_type); 33 34 std::unique_ptr<Packet> NextPacket() override; 35 36 private: 37 void WriteHeader(uint8_t* packet_memory); 38 39 const size_t kHeaderLenBytes = 12; 40 const size_t payload_len_samples_; 41 const size_t packet_len_bytes_; 42 uint8_t encoded_sample_[2]; 43 const int samples_per_ms_; 44 double next_arrival_time_ms_; 45 const int payload_type_; 46 uint16_t seq_number_; 47 uint32_t timestamp_; 48 const uint32_t payload_ssrc_; 49 50 RTC_DISALLOW_COPY_AND_ASSIGN(ConstantPcmPacketSource); 51 }; 52 53 } // namespace test 54 } // namespace webrtc 55 #endif // MODULES_AUDIO_CODING_NETEQ_TOOLS_CONSTANT_PCM_PACKET_SOURCE_H_ 56