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/*
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_coding/neteq/tools/rtp_file_source.h"
#include <algorithm>
#include <cstdint>
#include <cstring>
#include <memory>
#include <optional>
#include "absl/strings/string_view.h"
#include "api/units/timestamp.h"
#include "modules/audio_coding/neteq/tools/packet_source.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "rtc_base/checks.h"
#include "test/rtp_file_reader.h"
namespace webrtc {
namespace test {
RtpFileSource* RtpFileSource::Create(absl::string_view file_name,
std::optional<uint32_t> ssrc_filter) {
RtpFileSource* source = new RtpFileSource(ssrc_filter);
RTC_CHECK(source->OpenFile(file_name));
return source;
}
bool RtpFileSource::ValidRtpDump(absl::string_view file_name) {
std::unique_ptr<RtpFileReader> temp_file(
RtpFileReader::Create(RtpFileReader::kRtpDump, file_name));
return !!temp_file;
}
bool RtpFileSource::ValidPcap(absl::string_view file_name) {
std::unique_ptr<RtpFileReader> temp_file(
RtpFileReader::Create(RtpFileReader::kPcap, file_name));
return !!temp_file;
}
RtpFileSource::~RtpFileSource() {}
bool RtpFileSource::RegisterRtpHeaderExtension(RTPExtensionType type,
uint8_t id) {
return rtp_header_extension_map_.RegisterByType(id, type);
}
std::unique_ptr<RtpPacketReceived> RtpFileSource::NextPacket() {
while (true) {
RtpPacket temp_packet;
if (!rtp_reader_->NextPacket(&temp_packet)) {
return nullptr;
}
if (temp_packet.original_length == 0) {
// May be an RTCP packet.
// Read the next one.
continue;
}
auto rtp_packet =
std::make_unique<RtpPacketReceived>(&rtp_header_extension_map_);
if (!rtp_packet->Parse(temp_packet.data, temp_packet.length)) {
continue;
}
if (filter_.test(rtp_packet->PayloadType()) ||
(ssrc_filter_ && rtp_packet->Ssrc() != *ssrc_filter_)) {
// This payload type should be filtered out. Continue to the next packet.
continue;
}
rtp_packet->set_arrival_time(Timestamp::Millis(temp_packet.time_ms));
// Simulate payload if only the RTP header was written in the file.
if (temp_packet.original_length > rtp_packet->size()) {
size_t payload_size =
temp_packet.original_length - rtp_packet->headers_size();
if (rtp_packet->has_padding()) {
// If padding bit is set in the RTP header, assume it was a pure padding
// packet.
rtp_packet->SetPadding(payload_size);
} else {
std::fill_n(rtp_packet->AllocatePayload(payload_size), payload_size, 0);
}
}
return rtp_packet;
}
}
RtpFileSource::RtpFileSource(std::optional<uint32_t> ssrc_filter)
: PacketSource(), ssrc_filter_(ssrc_filter) {}
bool RtpFileSource::OpenFile(absl::string_view file_name) {
rtp_reader_.reset(RtpFileReader::Create(RtpFileReader::kRtpDump, file_name));
if (rtp_reader_)
return true;
rtp_reader_.reset(RtpFileReader::Create(RtpFileReader::kPcap, file_name));
if (!rtp_reader_) {
RTC_FATAL()
<< "Couldn't open input file as either a rtpdump or .pcap. Note "
<< "that .pcapng is not supported.";
}
return true;
}
} // namespace test
} // namespace webrtc
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