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