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      1 /*
      2  * libjingle
      3  * Copyright 2004 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/media/base/testutils.h"
     29 
     30 #include <math.h>
     31 
     32 #include "talk/media/base/executablehelpers.h"
     33 #include "talk/media/base/rtpdump.h"
     34 #include "talk/media/base/videocapturer.h"
     35 #include "talk/media/base/videoframe.h"
     36 #include "webrtc/base/bytebuffer.h"
     37 #include "webrtc/base/fileutils.h"
     38 #include "webrtc/base/gunit.h"
     39 #include "webrtc/base/pathutils.h"
     40 #include "webrtc/base/stream.h"
     41 #include "webrtc/base/stringutils.h"
     42 #include "webrtc/base/testutils.h"
     43 
     44 namespace cricket {
     45 
     46 /////////////////////////////////////////////////////////////////////////
     47 // Implementation of RawRtpPacket
     48 /////////////////////////////////////////////////////////////////////////
     49 void RawRtpPacket::WriteToByteBuffer(
     50     uint32 in_ssrc, rtc::ByteBuffer *buf) const {
     51   if (!buf) return;
     52 
     53   buf->WriteUInt8(ver_to_cc);
     54   buf->WriteUInt8(m_to_pt);
     55   buf->WriteUInt16(sequence_number);
     56   buf->WriteUInt32(timestamp);
     57   buf->WriteUInt32(in_ssrc);
     58   buf->WriteBytes(payload, sizeof(payload));
     59 }
     60 
     61 bool RawRtpPacket::ReadFromByteBuffer(rtc::ByteBuffer* buf) {
     62   if (!buf) return false;
     63 
     64   bool ret = true;
     65   ret &= buf->ReadUInt8(&ver_to_cc);
     66   ret &= buf->ReadUInt8(&m_to_pt);
     67   ret &= buf->ReadUInt16(&sequence_number);
     68   ret &= buf->ReadUInt32(&timestamp);
     69   ret &= buf->ReadUInt32(&ssrc);
     70   ret &= buf->ReadBytes(payload, sizeof(payload));
     71   return ret;
     72 }
     73 
     74 bool RawRtpPacket::SameExceptSeqNumTimestampSsrc(
     75     const RawRtpPacket& packet, uint16 seq, uint32 ts, uint32 ssc) const {
     76   return sequence_number == seq &&
     77       timestamp == ts &&
     78       ver_to_cc == packet.ver_to_cc &&
     79       m_to_pt == packet.m_to_pt &&
     80       ssrc == ssc &&
     81       0 == memcmp(payload, packet.payload, sizeof(payload));
     82 }
     83 
     84 /////////////////////////////////////////////////////////////////////////
     85 // Implementation of RawRtcpPacket
     86 /////////////////////////////////////////////////////////////////////////
     87 void RawRtcpPacket::WriteToByteBuffer(rtc::ByteBuffer *buf) const {
     88   if (!buf) return;
     89 
     90   buf->WriteUInt8(ver_to_count);
     91   buf->WriteUInt8(type);
     92   buf->WriteUInt16(length);
     93   buf->WriteBytes(payload, sizeof(payload));
     94 }
     95 
     96 bool RawRtcpPacket::ReadFromByteBuffer(rtc::ByteBuffer* buf) {
     97   if (!buf) return false;
     98 
     99   bool ret = true;
    100   ret &= buf->ReadUInt8(&ver_to_count);
    101   ret &= buf->ReadUInt8(&type);
    102   ret &= buf->ReadUInt16(&length);
    103   ret &= buf->ReadBytes(payload, sizeof(payload));
    104   return ret;
    105 }
    106 
    107 bool RawRtcpPacket::EqualsTo(const RawRtcpPacket& packet) const {
    108   return ver_to_count == packet.ver_to_count &&
    109       type == packet.type &&
    110       length == packet.length &&
    111       0 == memcmp(payload, packet.payload, sizeof(payload));
    112 }
    113 
    114 /////////////////////////////////////////////////////////////////////////
    115 // Implementation of class RtpTestUtility
    116 /////////////////////////////////////////////////////////////////////////
    117 const RawRtpPacket RtpTestUtility::kTestRawRtpPackets[] = {
    118     {0x80, 0, 0, 0,  RtpTestUtility::kDefaultSsrc, "RTP frame 0"},
    119     {0x80, 0, 1, 30, RtpTestUtility::kDefaultSsrc, "RTP frame 1"},
    120     {0x80, 0, 2, 30, RtpTestUtility::kDefaultSsrc, "RTP frame 1"},
    121     {0x80, 0, 3, 60, RtpTestUtility::kDefaultSsrc, "RTP frame 2"}
    122 };
    123 const RawRtcpPacket RtpTestUtility::kTestRawRtcpPackets[] = {
    124     // The Version is 2, the Length is 2, and the payload has 8 bytes.
    125     {0x80, 0, 2, "RTCP0000"},
    126     {0x80, 0, 2, "RTCP0001"},
    127     {0x80, 0, 2, "RTCP0002"},
    128     {0x80, 0, 2, "RTCP0003"},
    129 };
    130 
    131 size_t RtpTestUtility::GetTestPacketCount() {
    132   return rtc::_min(
    133       ARRAY_SIZE(kTestRawRtpPackets),
    134       ARRAY_SIZE(kTestRawRtcpPackets));
    135 }
    136 
    137 bool RtpTestUtility::WriteTestPackets(
    138     size_t count, bool rtcp, uint32 rtp_ssrc, RtpDumpWriter* writer) {
    139   if (!writer || count > GetTestPacketCount()) return false;
    140 
    141   bool result = true;
    142   uint32 elapsed_time_ms = 0;
    143   for (size_t i = 0; i < count && result; ++i) {
    144     rtc::ByteBuffer buf;
    145     if (rtcp) {
    146       kTestRawRtcpPackets[i].WriteToByteBuffer(&buf);
    147     } else {
    148       kTestRawRtpPackets[i].WriteToByteBuffer(rtp_ssrc, &buf);
    149     }
    150 
    151     RtpDumpPacket dump_packet(buf.Data(), buf.Length(), elapsed_time_ms, rtcp);
    152     elapsed_time_ms += kElapsedTimeInterval;
    153     result &= (rtc::SR_SUCCESS == writer->WritePacket(dump_packet));
    154   }
    155   return result;
    156 }
    157 
    158 bool RtpTestUtility::VerifyTestPacketsFromStream(
    159     size_t count, rtc::StreamInterface* stream, uint32 ssrc) {
    160   if (!stream) return false;
    161 
    162   uint32 prev_elapsed_time = 0;
    163   bool result = true;
    164   stream->Rewind();
    165   RtpDumpLoopReader reader(stream);
    166   for (size_t i = 0; i < count && result; ++i) {
    167     // Which loop and which index in the loop are we reading now.
    168     size_t loop = i / GetTestPacketCount();
    169     size_t index = i % GetTestPacketCount();
    170 
    171     RtpDumpPacket packet;
    172     result &= (rtc::SR_SUCCESS == reader.ReadPacket(&packet));
    173     // Check the elapsed time of the dump packet.
    174     result &= (packet.elapsed_time >= prev_elapsed_time);
    175     prev_elapsed_time = packet.elapsed_time;
    176 
    177     // Check the RTP or RTCP packet.
    178     rtc::ByteBuffer buf(reinterpret_cast<const char*>(&packet.data[0]),
    179                               packet.data.size());
    180     if (packet.is_rtcp()) {
    181       // RTCP packet.
    182       RawRtcpPacket rtcp_packet;
    183       result &= rtcp_packet.ReadFromByteBuffer(&buf);
    184       result &= rtcp_packet.EqualsTo(kTestRawRtcpPackets[index]);
    185     } else {
    186       // RTP packet.
    187       RawRtpPacket rtp_packet;
    188       result &= rtp_packet.ReadFromByteBuffer(&buf);
    189       result &= rtp_packet.SameExceptSeqNumTimestampSsrc(
    190           kTestRawRtpPackets[index],
    191           static_cast<uint16>(kTestRawRtpPackets[index].sequence_number +
    192                               loop * GetTestPacketCount()),
    193           static_cast<uint32>(kTestRawRtpPackets[index].timestamp +
    194                               loop * kRtpTimestampIncrease),
    195           ssrc);
    196     }
    197   }
    198 
    199   stream->Rewind();
    200   return result;
    201 }
    202 
    203 bool RtpTestUtility::VerifyPacket(const RtpDumpPacket* dump,
    204                                   const RawRtpPacket* raw,
    205                                   bool header_only) {
    206   if (!dump || !raw) return false;
    207 
    208   rtc::ByteBuffer buf;
    209   raw->WriteToByteBuffer(RtpTestUtility::kDefaultSsrc, &buf);
    210 
    211   if (header_only) {
    212     size_t header_len = 0;
    213     dump->GetRtpHeaderLen(&header_len);
    214     return header_len == dump->data.size() &&
    215         buf.Length() > dump->data.size() &&
    216         0 == memcmp(buf.Data(), &dump->data[0], dump->data.size());
    217   } else {
    218     return buf.Length() == dump->data.size() &&
    219         0 == memcmp(buf.Data(), &dump->data[0], dump->data.size());
    220   }
    221 }
    222 
    223 // Implementation of VideoCaptureListener.
    224 VideoCapturerListener::VideoCapturerListener(VideoCapturer* capturer)
    225     : last_capture_state_(CS_STARTING),
    226       frame_count_(0),
    227       frame_fourcc_(0),
    228       frame_width_(0),
    229       frame_height_(0),
    230       frame_size_(0),
    231       resolution_changed_(false) {
    232   capturer->SignalStateChange.connect(this,
    233       &VideoCapturerListener::OnStateChange);
    234   capturer->SignalFrameCaptured.connect(this,
    235       &VideoCapturerListener::OnFrameCaptured);
    236 }
    237 
    238 void VideoCapturerListener::OnStateChange(VideoCapturer* capturer,
    239                                           CaptureState result) {
    240   last_capture_state_ = result;
    241 }
    242 
    243 void VideoCapturerListener::OnFrameCaptured(VideoCapturer* capturer,
    244                                             const CapturedFrame* frame) {
    245   ++frame_count_;
    246   if (1 == frame_count_) {
    247     frame_fourcc_ = frame->fourcc;
    248     frame_width_ = frame->width;
    249     frame_height_ = frame->height;
    250     frame_size_ = frame->data_size;
    251   } else if (frame_width_ != frame->width || frame_height_ != frame->height) {
    252     resolution_changed_ = true;
    253   }
    254 }
    255 
    256 // Returns the absolute path to a file in the testdata/ directory.
    257 std::string GetTestFilePath(const std::string& filename) {
    258   // Locate test data directory.
    259 #ifdef ENABLE_WEBRTC
    260   rtc::Pathname path = rtc::GetExecutablePath();
    261   EXPECT_FALSE(path.empty());
    262   path.AppendPathname("../../talk/");
    263 #else
    264   rtc::Pathname path = testing::GetTalkDirectory();
    265   EXPECT_FALSE(path.empty());  // must be run from inside "talk"
    266 #endif
    267   path.AppendFolder("media/testdata/");
    268   path.SetFilename(filename);
    269   return path.pathname();
    270 }
    271 
    272 // Loads the image with the specified prefix and size into |out|.
    273 bool LoadPlanarYuvTestImage(const std::string& prefix,
    274                             int width, int height, uint8* out) {
    275   std::stringstream ss;
    276   ss << prefix << "." << width << "x" << height << "_P420.yuv";
    277 
    278   rtc::scoped_ptr<rtc::FileStream> stream(
    279       rtc::Filesystem::OpenFile(rtc::Pathname(
    280           GetTestFilePath(ss.str())), "rb"));
    281   if (!stream) {
    282     return false;
    283   }
    284 
    285   rtc::StreamResult res =
    286       stream->ReadAll(out, I420_SIZE(width, height), NULL, NULL);
    287   return (res == rtc::SR_SUCCESS);
    288 }
    289 
    290 // Dumps the YUV image out to a file, for visual inspection.
    291 // PYUV tool can be used to view dump files.
    292 void DumpPlanarYuvTestImage(const std::string& prefix, const uint8* img,
    293                             int w, int h) {
    294   rtc::FileStream fs;
    295   char filename[256];
    296   rtc::sprintfn(filename, sizeof(filename), "%s.%dx%d_P420.yuv",
    297                       prefix.c_str(), w, h);
    298   fs.Open(filename, "wb", NULL);
    299   fs.Write(img, I420_SIZE(w, h), NULL, NULL);
    300 }
    301 
    302 // Dumps the ARGB image out to a file, for visual inspection.
    303 // ffplay tool can be used to view dump files.
    304 void DumpPlanarArgbTestImage(const std::string& prefix, const uint8* img,
    305                              int w, int h) {
    306   rtc::FileStream fs;
    307   char filename[256];
    308   rtc::sprintfn(filename, sizeof(filename), "%s.%dx%d_ARGB.raw",
    309                       prefix.c_str(), w, h);
    310   fs.Open(filename, "wb", NULL);
    311   fs.Write(img, ARGB_SIZE(w, h), NULL, NULL);
    312 }
    313 
    314 bool VideoFrameEqual(const VideoFrame* frame0, const VideoFrame* frame1) {
    315   const uint8* y0 = frame0->GetYPlane();
    316   const uint8* u0 = frame0->GetUPlane();
    317   const uint8* v0 = frame0->GetVPlane();
    318   const uint8* y1 = frame1->GetYPlane();
    319   const uint8* u1 = frame1->GetUPlane();
    320   const uint8* v1 = frame1->GetVPlane();
    321 
    322   for (size_t i = 0; i < frame0->GetHeight(); ++i) {
    323     if (0 != memcmp(y0, y1, frame0->GetWidth())) {
    324       return false;
    325     }
    326     y0 += frame0->GetYPitch();
    327     y1 += frame1->GetYPitch();
    328   }
    329 
    330   for (size_t i = 0; i < frame0->GetChromaHeight(); ++i) {
    331     if (0 != memcmp(u0, u1, frame0->GetChromaWidth())) {
    332       return false;
    333     }
    334     if (0 != memcmp(v0, v1, frame0->GetChromaWidth())) {
    335       return false;
    336     }
    337     u0 += frame0->GetUPitch();
    338     v0 += frame0->GetVPitch();
    339     u1 += frame1->GetUPitch();
    340     v1 += frame1->GetVPitch();
    341   }
    342 
    343   return true;
    344 }
    345 
    346 cricket::StreamParams CreateSimStreamParams(
    347     const std::string& cname, const std::vector<uint32>& ssrcs) {
    348   cricket::StreamParams sp;
    349   cricket::SsrcGroup sg(cricket::kSimSsrcGroupSemantics, ssrcs);
    350   sp.ssrcs = ssrcs;
    351   sp.ssrc_groups.push_back(sg);
    352   sp.cname = cname;
    353   return sp;
    354 }
    355 
    356 // There should be an rtx_ssrc per ssrc.
    357 cricket::StreamParams CreateSimWithRtxStreamParams(
    358     const std::string& cname, const std::vector<uint32>& ssrcs,
    359     const std::vector<uint32>& rtx_ssrcs) {
    360   cricket::StreamParams sp = CreateSimStreamParams(cname, ssrcs);
    361   for (size_t i = 0; i < ssrcs.size(); ++i) {
    362     sp.ssrcs.push_back(rtx_ssrcs[i]);
    363     std::vector<uint32> fid_ssrcs;
    364     fid_ssrcs.push_back(ssrcs[i]);
    365     fid_ssrcs.push_back(rtx_ssrcs[i]);
    366     cricket::SsrcGroup fid_group(cricket::kFidSsrcGroupSemantics, fid_ssrcs);
    367     sp.ssrc_groups.push_back(fid_group);
    368   }
    369   return sp;
    370 }
    371 
    372 }  // namespace cricket
    373