blob: fbbd468df8baeb58fccb36667014641ab43fb98f [file] [log] [blame]
henrik.lundin@webrtc.org81a78932014-10-14 10:49:581/*
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#include "webrtc/modules/audio_coding/neteq/tools/constant_pcm_packet_source.h"
12
13#include <algorithm>
14
15#include "webrtc/base/checks.h"
kjellander@webrtc.org3c652b62015-11-18 22:07:5716#include "webrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h"
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5817#include "webrtc/modules/audio_coding/neteq/tools/packet.h"
18
19namespace webrtc {
20namespace test {
21
22ConstantPcmPacketSource::ConstantPcmPacketSource(size_t payload_len_samples,
23 int16_t sample_value,
24 int sample_rate_hz,
25 int payload_type)
26 : payload_len_samples_(payload_len_samples),
27 packet_len_bytes_(2 * payload_len_samples_ + kHeaderLenBytes),
28 samples_per_ms_(sample_rate_hz / 1000),
29 next_arrival_time_ms_(0.0),
30 payload_type_(payload_type),
31 seq_number_(0),
32 timestamp_(0),
33 payload_ssrc_(0xABCD1234) {
Peter Kastingdce40cf2015-08-24 21:52:2334 size_t encoded_len = WebRtcPcm16b_Encode(&sample_value, 1, encoded_sample_);
henrikg91d6ede2015-09-17 07:24:3435 RTC_CHECK_EQ(2U, encoded_len);
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5836}
37
henrik.lundin46ba49c2016-05-25 05:50:4738std::unique_ptr<Packet> ConstantPcmPacketSource::NextPacket() {
henrikg91d6ede2015-09-17 07:24:3439 RTC_CHECK_GT(packet_len_bytes_, kHeaderLenBytes);
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5840 uint8_t* packet_memory = new uint8_t[packet_len_bytes_];
41 // Fill the payload part of the packet memory with the pre-encoded value.
kwiberg@webrtc.org648f5d62015-02-10 09:18:2842 for (unsigned i = 0; i < 2 * payload_len_samples_; ++i)
43 packet_memory[kHeaderLenBytes + i] = encoded_sample_[i % 2];
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5844 WriteHeader(packet_memory);
45 // |packet| assumes ownership of |packet_memory|.
henrik.lundin46ba49c2016-05-25 05:50:4746 std::unique_ptr<Packet> packet(
47 new Packet(packet_memory, packet_len_bytes_, next_arrival_time_ms_));
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5848 next_arrival_time_ms_ += payload_len_samples_ / samples_per_ms_;
49 return packet;
50}
51
52void ConstantPcmPacketSource::WriteHeader(uint8_t* packet_memory) {
53 packet_memory[0] = 0x80;
pkasting@chromium.orgd3245462015-02-23 21:28:2254 packet_memory[1] = static_cast<uint8_t>(payload_type_);
55 packet_memory[2] = seq_number_ >> 8;
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5856 packet_memory[3] = seq_number_ & 0xFF;
pkasting@chromium.orgd3245462015-02-23 21:28:2257 packet_memory[4] = timestamp_ >> 24;
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5858 packet_memory[5] = (timestamp_ >> 16) & 0xFF;
59 packet_memory[6] = (timestamp_ >> 8) & 0xFF;
60 packet_memory[7] = timestamp_ & 0xFF;
pkasting@chromium.orgd3245462015-02-23 21:28:2261 packet_memory[8] = payload_ssrc_ >> 24;
henrik.lundin@webrtc.org81a78932014-10-14 10:49:5862 packet_memory[9] = (payload_ssrc_ >> 16) & 0xFF;
63 packet_memory[10] = (payload_ssrc_ >> 8) & 0xFF;
64 packet_memory[11] = payload_ssrc_ & 0xFF;
65 ++seq_number_;
66 timestamp_ += static_cast<uint32_t>(payload_len_samples_);
67}
68
69} // namespace test
70} // namespace webrtc