webrtc/media/base/testutils.cc - src - Git at Google

 /*
  *  Copyright (c) 2004 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 "webrtc/media/base/testutils.h"

 #include <math.h>
 #include <algorithm>
 #include <memory>

 #include "webrtc/base/bytebuffer.h"
 #include "webrtc/base/fileutils.h"
 #include "webrtc/base/gunit.h"
 #include "webrtc/base/pathutils.h"
 #include "webrtc/base/stream.h"
 #include "webrtc/base/stringutils.h"
 #include "webrtc/base/testutils.h"
 #include "webrtc/media/base/rtpdump.h"
 #include "webrtc/media/base/videocapturer.h"
 #include "webrtc/media/base/videoframe.h"

 namespace cricket {

 /////////////////////////////////////////////////////////////////////////
 // Implementation of RawRtpPacket
 /////////////////////////////////////////////////////////////////////////
 void RawRtpPacket::WriteToByteBuffer(uint32_t in_ssrc,
                                      rtc::ByteBufferWriter* buf) const {
   if (!buf) return;

   buf->WriteUInt8(ver_to_cc);
   buf->WriteUInt8(m_to_pt);
   buf->WriteUInt16(sequence_number);
   buf->WriteUInt32(timestamp);
   buf->WriteUInt32(in_ssrc);
   buf->WriteBytes(payload, sizeof(payload));
 }

 bool RawRtpPacket::ReadFromByteBuffer(rtc::ByteBufferReader* buf) {
   if (!buf) return false;

   bool ret = true;
   ret &= buf->ReadUInt8(&ver_to_cc);
   ret &= buf->ReadUInt8(&m_to_pt);
   ret &= buf->ReadUInt16(&sequence_number);
   ret &= buf->ReadUInt32(&timestamp);
   ret &= buf->ReadUInt32(&ssrc);
   ret &= buf->ReadBytes(payload, sizeof(payload));
   return ret;
 }

 bool RawRtpPacket::SameExceptSeqNumTimestampSsrc(const RawRtpPacket& packet,
                                                  uint16_t seq,
                                                  uint32_t ts,
                                                  uint32_t ssc) const {
   return sequence_number == seq &&
       timestamp == ts &&
       ver_to_cc == packet.ver_to_cc &&
       m_to_pt == packet.m_to_pt &&
       ssrc == ssc &&
       0 == memcmp(payload, packet.payload, sizeof(payload));
 }

 /////////////////////////////////////////////////////////////////////////
 // Implementation of RawRtcpPacket
 /////////////////////////////////////////////////////////////////////////
 void RawRtcpPacket::WriteToByteBuffer(rtc::ByteBufferWriter *buf) const {
   if (!buf) return;

   buf->WriteUInt8(ver_to_count);
   buf->WriteUInt8(type);
   buf->WriteUInt16(length);
   buf->WriteBytes(payload, sizeof(payload));
 }

 bool RawRtcpPacket::ReadFromByteBuffer(rtc::ByteBufferReader* buf) {
   if (!buf) return false;

   bool ret = true;
   ret &= buf->ReadUInt8(&ver_to_count);
   ret &= buf->ReadUInt8(&type);
   ret &= buf->ReadUInt16(&length);
   ret &= buf->ReadBytes(payload, sizeof(payload));
   return ret;
 }

 bool RawRtcpPacket::EqualsTo(const RawRtcpPacket& packet) const {
   return ver_to_count == packet.ver_to_count &&
       type == packet.type &&
       length == packet.length &&
       0 == memcmp(payload, packet.payload, sizeof(payload));
 }

 /////////////////////////////////////////////////////////////////////////
 // Implementation of class RtpTestUtility
 /////////////////////////////////////////////////////////////////////////
 const RawRtpPacket RtpTestUtility::kTestRawRtpPackets[] = {
     {0x80, 0, 0, 0,  RtpTestUtility::kDefaultSsrc, "RTP frame 0"},
     {0x80, 0, 1, 30, RtpTestUtility::kDefaultSsrc, "RTP frame 1"},
     {0x80, 0, 2, 30, RtpTestUtility::kDefaultSsrc, "RTP frame 1"},
     {0x80, 0, 3, 60, RtpTestUtility::kDefaultSsrc, "RTP frame 2"}
 };
 const RawRtcpPacket RtpTestUtility::kTestRawRtcpPackets[] = {
     // The Version is 2, the Length is 2, and the payload has 8 bytes.
     {0x80, 0, 2, "RTCP0000"},
     {0x80, 0, 2, "RTCP0001"},
     {0x80, 0, 2, "RTCP0002"},
     {0x80, 0, 2, "RTCP0003"},
 };

 size_t RtpTestUtility::GetTestPacketCount() {
   return std::min(arraysize(kTestRawRtpPackets),
                   arraysize(kTestRawRtcpPackets));
 }

 bool RtpTestUtility::WriteTestPackets(size_t count,
                                       bool rtcp,
                                       uint32_t rtp_ssrc,
                                       RtpDumpWriter* writer) {
   if (!writer || count > GetTestPacketCount()) return false;

   bool result = true;
   uint32_t elapsed_time_ms = 0;
   for (size_t i = 0; i < count && result; ++i) {
     rtc::ByteBufferWriter buf;
     if (rtcp) {
       kTestRawRtcpPackets[i].WriteToByteBuffer(&buf);
     } else {
       kTestRawRtpPackets[i].WriteToByteBuffer(rtp_ssrc, &buf);
     }

     RtpDumpPacket dump_packet(buf.Data(), buf.Length(), elapsed_time_ms, rtcp);
     elapsed_time_ms += kElapsedTimeInterval;
     result &= (rtc::SR_SUCCESS == writer->WritePacket(dump_packet));
   }
   return result;
 }

 bool RtpTestUtility::VerifyTestPacketsFromStream(size_t count,
                                                  rtc::StreamInterface* stream,
                                                  uint32_t ssrc) {
   if (!stream) return false;

   uint32_t prev_elapsed_time = 0;
   bool result = true;
   stream->Rewind();
   RtpDumpLoopReader reader(stream);
   for (size_t i = 0; i < count && result; ++i) {
     // Which loop and which index in the loop are we reading now.
     size_t loop = i / GetTestPacketCount();
     size_t index = i % GetTestPacketCount();

     RtpDumpPacket packet;
     result &= (rtc::SR_SUCCESS == reader.ReadPacket(&packet));
     // Check the elapsed time of the dump packet.
     result &= (packet.elapsed_time >= prev_elapsed_time);
     prev_elapsed_time = packet.elapsed_time;

     // Check the RTP or RTCP packet.
     rtc::ByteBufferReader buf(reinterpret_cast<const char*>(&packet.data[0]),
                               packet.data.size());
     if (packet.is_rtcp()) {
       // RTCP packet.
       RawRtcpPacket rtcp_packet;
       result &= rtcp_packet.ReadFromByteBuffer(&buf);
       result &= rtcp_packet.EqualsTo(kTestRawRtcpPackets[index]);
     } else {
       // RTP packet.
       RawRtpPacket rtp_packet;
       result &= rtp_packet.ReadFromByteBuffer(&buf);
       result &= rtp_packet.SameExceptSeqNumTimestampSsrc(
           kTestRawRtpPackets[index],
           static_cast<uint16_t>(kTestRawRtpPackets[index].sequence_number +
                                 loop * GetTestPacketCount()),
           static_cast<uint32_t>(kTestRawRtpPackets[index].timestamp +
                                 loop * kRtpTimestampIncrease),
           ssrc);
     }
   }

   stream->Rewind();
   return result;
 }

 bool RtpTestUtility::VerifyPacket(const RtpDumpPacket* dump,
                                   const RawRtpPacket* raw,
                                   bool header_only) {
   if (!dump || !raw) return false;

   rtc::ByteBufferWriter buf;
   raw->WriteToByteBuffer(RtpTestUtility::kDefaultSsrc, &buf);

   if (header_only) {
     size_t header_len = 0;
     dump->GetRtpHeaderLen(&header_len);
     return header_len == dump->data.size() &&
         buf.Length() > dump->data.size() &&
         0 == memcmp(buf.Data(), &dump->data[0], dump->data.size());
   } else {
     return buf.Length() == dump->data.size() &&
         0 == memcmp(buf.Data(), &dump->data[0], dump->data.size());
   }
 }

 // Implementation of VideoCaptureListener.
 VideoCapturerListener::VideoCapturerListener(VideoCapturer* capturer)
     : capturer_(capturer),
       last_capture_state_(CS_STARTING),
       frame_count_(0),
       frame_width_(0),
       frame_height_(0),
       resolution_changed_(false) {
   capturer->SignalStateChange.connect(this,
       &VideoCapturerListener::OnStateChange);
   capturer->AddOrUpdateSink(this, rtc::VideoSinkWants());
 }

 VideoCapturerListener::~VideoCapturerListener() {
   capturer_->RemoveSink(this);
 }

 void VideoCapturerListener::OnStateChange(VideoCapturer* capturer,
                                           CaptureState result) {
   last_capture_state_ = result;
 }

 void VideoCapturerListener::OnFrame(const VideoFrame& frame) {
   ++frame_count_;
   if (1 == frame_count_) {
     frame_width_ = frame.width();
     frame_height_ = frame.height();
   } else if (frame_width_ != frame.width() || frame_height_ != frame.height()) {
     resolution_changed_ = true;
   }
 }

 cricket::StreamParams CreateSimStreamParams(
     const std::string& cname,
     const std::vector<uint32_t>& ssrcs) {
   cricket::StreamParams sp;
   cricket::SsrcGroup sg(cricket::kSimSsrcGroupSemantics, ssrcs);
   sp.ssrcs = ssrcs;
   sp.ssrc_groups.push_back(sg);
   sp.cname = cname;
   return sp;
 }

 // There should be an rtx_ssrc per ssrc.
 cricket::StreamParams CreateSimWithRtxStreamParams(
     const std::string& cname,
     const std::vector<uint32_t>& ssrcs,
     const std::vector<uint32_t>& rtx_ssrcs) {
   cricket::StreamParams sp = CreateSimStreamParams(cname, ssrcs);
   for (size_t i = 0; i < ssrcs.size(); ++i) {
     sp.ssrcs.push_back(rtx_ssrcs[i]);
     std::vector<uint32_t> fid_ssrcs;
     fid_ssrcs.push_back(ssrcs[i]);
     fid_ssrcs.push_back(rtx_ssrcs[i]);
     cricket::SsrcGroup fid_group(cricket::kFidSsrcGroupSemantics, fid_ssrcs);
     sp.ssrc_groups.push_back(fid_group);
   }
   return sp;
 }

 }  // namespace cricket
	/*
	* Copyright (c) 2004 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 "webrtc/media/base/testutils.h"

	#include <math.h>
	#include <algorithm>
	#include <memory>

	#include "webrtc/base/bytebuffer.h"
	#include "webrtc/base/fileutils.h"
	#include "webrtc/base/gunit.h"
	#include "webrtc/base/pathutils.h"
	#include "webrtc/base/stream.h"
	#include "webrtc/base/stringutils.h"
	#include "webrtc/base/testutils.h"
	#include "webrtc/media/base/rtpdump.h"
	#include "webrtc/media/base/videocapturer.h"
	#include "webrtc/media/base/videoframe.h"

	namespace cricket {

	/////////////////////////////////////////////////////////////////////////
	// Implementation of RawRtpPacket
	/////////////////////////////////////////////////////////////////////////
	void RawRtpPacket::WriteToByteBuffer(uint32_t in_ssrc,
	rtc::ByteBufferWriter* buf) const {
	if (!buf) return;

	buf->WriteUInt8(ver_to_cc);
	buf->WriteUInt8(m_to_pt);
	buf->WriteUInt16(sequence_number);
	buf->WriteUInt32(timestamp);
	buf->WriteUInt32(in_ssrc);
	buf->WriteBytes(payload, sizeof(payload));
	}

	bool RawRtpPacket::ReadFromByteBuffer(rtc::ByteBufferReader* buf) {
	if (!buf) return false;

	bool ret = true;
	ret &= buf->ReadUInt8(&ver_to_cc);
	ret &= buf->ReadUInt8(&m_to_pt);
	ret &= buf->ReadUInt16(&sequence_number);
	ret &= buf->ReadUInt32(&timestamp);
	ret &= buf->ReadUInt32(&ssrc);
	ret &= buf->ReadBytes(payload, sizeof(payload));
	return ret;
	}

	bool RawRtpPacket::SameExceptSeqNumTimestampSsrc(const RawRtpPacket& packet,
	uint16_t seq,
	uint32_t ts,
	uint32_t ssc) const {
	return sequence_number == seq &&
	timestamp == ts &&
	ver_to_cc == packet.ver_to_cc &&
	m_to_pt == packet.m_to_pt &&
	ssrc == ssc &&
	0 == memcmp(payload, packet.payload, sizeof(payload));
	}

	/////////////////////////////////////////////////////////////////////////
	// Implementation of RawRtcpPacket
	/////////////////////////////////////////////////////////////////////////
	void RawRtcpPacket::WriteToByteBuffer(rtc::ByteBufferWriter *buf) const {
	if (!buf) return;

	buf->WriteUInt8(ver_to_count);
	buf->WriteUInt8(type);
	buf->WriteUInt16(length);
	buf->WriteBytes(payload, sizeof(payload));
	}

	bool RawRtcpPacket::ReadFromByteBuffer(rtc::ByteBufferReader* buf) {
	if (!buf) return false;

	bool ret = true;
	ret &= buf->ReadUInt8(&ver_to_count);
	ret &= buf->ReadUInt8(&type);
	ret &= buf->ReadUInt16(&length);
	ret &= buf->ReadBytes(payload, sizeof(payload));
	return ret;
	}

	bool RawRtcpPacket::EqualsTo(const RawRtcpPacket& packet) const {
	return ver_to_count == packet.ver_to_count &&
	type == packet.type &&
	length == packet.length &&
	0 == memcmp(payload, packet.payload, sizeof(payload));
	}

	/////////////////////////////////////////////////////////////////////////
	// Implementation of class RtpTestUtility
	/////////////////////////////////////////////////////////////////////////
	const RawRtpPacket RtpTestUtility::kTestRawRtpPackets[] = {
	{0x80, 0, 0, 0, RtpTestUtility::kDefaultSsrc, "RTP frame 0"},
	{0x80, 0, 1, 30, RtpTestUtility::kDefaultSsrc, "RTP frame 1"},
	{0x80, 0, 2, 30, RtpTestUtility::kDefaultSsrc, "RTP frame 1"},
	{0x80, 0, 3, 60, RtpTestUtility::kDefaultSsrc, "RTP frame 2"}
	};
	const RawRtcpPacket RtpTestUtility::kTestRawRtcpPackets[] = {
	// The Version is 2, the Length is 2, and the payload has 8 bytes.
	{0x80, 0, 2, "RTCP0000"},
	{0x80, 0, 2, "RTCP0001"},
	{0x80, 0, 2, "RTCP0002"},
	{0x80, 0, 2, "RTCP0003"},
	};

	size_t RtpTestUtility::GetTestPacketCount() {
	return std::min(arraysize(kTestRawRtpPackets),
	arraysize(kTestRawRtcpPackets));
	}

	bool RtpTestUtility::WriteTestPackets(size_t count,
	bool rtcp,
	uint32_t rtp_ssrc,
	RtpDumpWriter* writer) {
	if (!writer \|\| count > GetTestPacketCount()) return false;

	bool result = true;
	uint32_t elapsed_time_ms = 0;
	for (size_t i = 0; i < count && result; ++i) {
	rtc::ByteBufferWriter buf;
	if (rtcp) {
	kTestRawRtcpPackets[i].WriteToByteBuffer(&buf);
	} else {
	kTestRawRtpPackets[i].WriteToByteBuffer(rtp_ssrc, &buf);
	}

	RtpDumpPacket dump_packet(buf.Data(), buf.Length(), elapsed_time_ms, rtcp);
	elapsed_time_ms += kElapsedTimeInterval;
	result &= (rtc::SR_SUCCESS == writer->WritePacket(dump_packet));
	}
	return result;
	}

	bool RtpTestUtility::VerifyTestPacketsFromStream(size_t count,
	rtc::StreamInterface* stream,
	uint32_t ssrc) {
	if (!stream) return false;

	uint32_t prev_elapsed_time = 0;
	bool result = true;
	stream->Rewind();
	RtpDumpLoopReader reader(stream);
	for (size_t i = 0; i < count && result; ++i) {
	// Which loop and which index in the loop are we reading now.
	size_t loop = i / GetTestPacketCount();
	size_t index = i % GetTestPacketCount();

	RtpDumpPacket packet;
	result &= (rtc::SR_SUCCESS == reader.ReadPacket(&packet));
	// Check the elapsed time of the dump packet.
	result &= (packet.elapsed_time >= prev_elapsed_time);
	prev_elapsed_time = packet.elapsed_time;

	// Check the RTP or RTCP packet.
	rtc::ByteBufferReader buf(reinterpret_cast<const char*>(&packet.data[0]),
	packet.data.size());
	if (packet.is_rtcp()) {
	// RTCP packet.
	RawRtcpPacket rtcp_packet;
	result &= rtcp_packet.ReadFromByteBuffer(&buf);
	result &= rtcp_packet.EqualsTo(kTestRawRtcpPackets[index]);
	} else {
	// RTP packet.
	RawRtpPacket rtp_packet;
	result &= rtp_packet.ReadFromByteBuffer(&buf);
	result &= rtp_packet.SameExceptSeqNumTimestampSsrc(
	kTestRawRtpPackets[index],
	static_cast<uint16_t>(kTestRawRtpPackets[index].sequence_number +
	loop * GetTestPacketCount()),
	static_cast<uint32_t>(kTestRawRtpPackets[index].timestamp +
	loop * kRtpTimestampIncrease),
	ssrc);
	}
	}

	stream->Rewind();
	return result;
	}

	bool RtpTestUtility::VerifyPacket(const RtpDumpPacket* dump,
	const RawRtpPacket* raw,
	bool header_only) {
	if (!dump \|\| !raw) return false;

	rtc::ByteBufferWriter buf;
	raw->WriteToByteBuffer(RtpTestUtility::kDefaultSsrc, &buf);

	if (header_only) {
	size_t header_len = 0;
	dump->GetRtpHeaderLen(&header_len);
	return header_len == dump->data.size() &&
	buf.Length() > dump->data.size() &&
	0 == memcmp(buf.Data(), &dump->data[0], dump->data.size());
	} else {
	return buf.Length() == dump->data.size() &&
	0 == memcmp(buf.Data(), &dump->data[0], dump->data.size());
	}
	}

	// Implementation of VideoCaptureListener.
	VideoCapturerListener::VideoCapturerListener(VideoCapturer* capturer)
	: capturer_(capturer),
	last_capture_state_(CS_STARTING),
	frame_count_(0),
	frame_width_(0),
	frame_height_(0),
	resolution_changed_(false) {
	capturer->SignalStateChange.connect(this,
	&VideoCapturerListener::OnStateChange);
	capturer->AddOrUpdateSink(this, rtc::VideoSinkWants());
	}

	VideoCapturerListener::~VideoCapturerListener() {
	capturer_->RemoveSink(this);
	}

	void VideoCapturerListener::OnStateChange(VideoCapturer* capturer,
	CaptureState result) {
	last_capture_state_ = result;
	}

	void VideoCapturerListener::OnFrame(const VideoFrame& frame) {
	++frame_count_;
	if (1 == frame_count_) {
	frame_width_ = frame.width();
	frame_height_ = frame.height();
	} else if (frame_width_ != frame.width() \|\| frame_height_ != frame.height()) {
	resolution_changed_ = true;
	}
	}

	cricket::StreamParams CreateSimStreamParams(
	const std::string& cname,
	const std::vector<uint32_t>& ssrcs) {
	cricket::StreamParams sp;
	cricket::SsrcGroup sg(cricket::kSimSsrcGroupSemantics, ssrcs);
	sp.ssrcs = ssrcs;
	sp.ssrc_groups.push_back(sg);
	sp.cname = cname;
	return sp;
	}

	// There should be an rtx_ssrc per ssrc.
	cricket::StreamParams CreateSimWithRtxStreamParams(
	const std::string& cname,
	const std::vector<uint32_t>& ssrcs,
	const std::vector<uint32_t>& rtx_ssrcs) {
	cricket::StreamParams sp = CreateSimStreamParams(cname, ssrcs);
	for (size_t i = 0; i < ssrcs.size(); ++i) {
	sp.ssrcs.push_back(rtx_ssrcs[i]);
	std::vector<uint32_t> fid_ssrcs;
	fid_ssrcs.push_back(ssrcs[i]);
	fid_ssrcs.push_back(rtx_ssrcs[i]);
	cricket::SsrcGroup fid_group(cricket::kFidSsrcGroupSemantics, fid_ssrcs);
	sp.ssrc_groups.push_back(fid_group);
	}
	return sp;
	}

	} // namespace cricket