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