media/ffmpeg/ffmpeg_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // ffmpeg_unittests verify that the parts of the FFmpeg API that Chromium uses
   6 // function as advertised for each media format that Chromium supports.  This
   7 // mostly includes stuff like reporting proper timestamps, seeking to
   8 // keyframes, and supporting certain features like reordered_opaque.
   9 //
  10
  11 #include <limits>
  12 #include <queue>
  13
  14 #include "base/base_paths.h"
  15 #include "base/file_util.h"
  16 #include "base/files/file_path.h"
  17 #include "base/files/memory_mapped_file.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/path_service.h"
  20 #include "base/strings/string_util.h"
  21 #include "base/test/perf_test_suite.h"
  22 #include "base/test/perftimer.h"
  23 #include "media/base/media.h"
  24 #include "media/ffmpeg/ffmpeg_common.h"
  25 #include "media/filters/ffmpeg_glue.h"
  26 #include "media/filters/in_memory_url_protocol.h"
  27 #include "testing/gtest/include/gtest/gtest.h"
  28
  29 int main(int argc, char** argv) {
  30   return base::PerfTestSuite(argc, argv).Run();
  31 }
  32
  33 namespace media {
  34
  35 // Mirror setting in ffmpeg_video_decoder.
  36 static const int kDecodeThreads = 2;
  37
  38 class AVPacketQueue {
  39  public:
  40   AVPacketQueue() {
  41   }
  42
  43   ~AVPacketQueue() {
  44     flush();
  45   }
  46
  47   bool empty() {
  48     return packets_.empty();
  49   }
  50
  51   AVPacket* peek() {
  52     return packets_.front();
  53   }
  54
  55   void pop() {
  56     AVPacket* packet = packets_.front();
  57     packets_.pop();
  58     av_free_packet(packet);
  59     delete packet;
  60   }
  61
  62   void push(AVPacket* packet) {
  63     av_dup_packet(packet);
  64     packets_.push(packet);
  65   }
  66
  67   void flush() {
  68     while (!empty()) {
  69       pop();
  70     }
  71   }
  72
  73  private:
  74   std::queue<AVPacket*> packets_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(AVPacketQueue);
  77 };
  78
  79 // TODO(dalecurtis): We should really just use PipelineIntegrationTests instead
  80 // of a one-off step decoder so we're exercising the real pipeline.
  81 class FFmpegTest : public testing::TestWithParam<const char*> {
  82  protected:
  83   FFmpegTest()
  84       : av_format_context_(NULL),
  85         audio_stream_index_(-1),
  86         video_stream_index_(-1),
  87         decoded_audio_time_(AV_NOPTS_VALUE),
  88         decoded_audio_duration_(AV_NOPTS_VALUE),
  89         decoded_video_time_(AV_NOPTS_VALUE),
  90         decoded_video_duration_(AV_NOPTS_VALUE),
  91         duration_(AV_NOPTS_VALUE) {
  92     InitializeFFmpeg();
  93
  94     audio_buffer_.reset(avcodec_alloc_frame());
  95     video_buffer_.reset(avcodec_alloc_frame());
  96   }
  97
  98   virtual ~FFmpegTest() {
  99   }
 100
 101   void OpenAndReadFile(const std::string& name) {
 102     OpenFile(name);
 103     OpenCodecs();
 104     ReadRemainingFile();
 105   }
 106
 107   void OpenFile(const std::string& name) {
 108     base::FilePath path;
 109     PathService::Get(base::DIR_SOURCE_ROOT, &path);
 110     path = path.AppendASCII("media")
 111         .AppendASCII("test")
 112         .AppendASCII("data")
 113         .AppendASCII("content")
 114         .AppendASCII(name.c_str());
 115     EXPECT_TRUE(base::PathExists(path));
 116
 117     CHECK(file_data_.Initialize(path));
 118     protocol_.reset(new InMemoryUrlProtocol(
 119         file_data_.data(), file_data_.length(), false));
 120     glue_.reset(new FFmpegGlue(protocol_.get()));
 121
 122     ASSERT_TRUE(glue_->OpenContext()) << "Could not open " << path.value();
 123     av_format_context_ = glue_->format_context();
 124     ASSERT_LE(0, avformat_find_stream_info(av_format_context_, NULL))
 125         << "Could not find stream information for " << path.value();
 126
 127     // Determine duration by picking max stream duration.
 128     for (unsigned int i = 0; i < av_format_context_->nb_streams; ++i) {
 129       AVStream* av_stream = av_format_context_->streams[i];
 130       int64 duration = ConvertFromTimeBase(
 131           av_stream->time_base, av_stream->duration).InMicroseconds();
 132       duration_ = std::max(duration_, duration);
 133     }
 134
 135     // Final check to see if the container itself specifies a duration.
 136     AVRational av_time_base = {1, AV_TIME_BASE};
 137     int64 duration =
 138         ConvertFromTimeBase(av_time_base,
 139                             av_format_context_->duration).InMicroseconds();
 140     duration_ = std::max(duration_, duration);
 141   }
 142
 143   void OpenCodecs() {
 144     for (unsigned int i = 0; i < av_format_context_->nb_streams; ++i) {
 145       AVStream* av_stream = av_format_context_->streams[i];
 146       AVCodecContext* av_codec_context = av_stream->codec;
 147       AVCodec* av_codec = avcodec_find_decoder(av_codec_context->codec_id);
 148
 149       EXPECT_TRUE(av_codec)
 150           << "Could not find AVCodec with CodecID "
 151           << av_codec_context->codec_id;
 152
 153       av_codec_context->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK;
 154       av_codec_context->thread_count = kDecodeThreads;
 155
 156       EXPECT_EQ(0, avcodec_open2(av_codec_context, av_codec, NULL))
 157           << "Could not open AVCodecContext with CodecID "
 158           << av_codec_context->codec_id;
 159
 160       if (av_codec->type == AVMEDIA_TYPE_AUDIO) {
 161         EXPECT_EQ(-1, audio_stream_index_) << "Found multiple audio streams.";
 162         audio_stream_index_ = static_cast<int>(i);
 163       } else if (av_codec->type == AVMEDIA_TYPE_VIDEO) {
 164         EXPECT_EQ(-1, video_stream_index_) << "Found multiple video streams.";
 165         video_stream_index_ = static_cast<int>(i);
 166       } else {
 167         ADD_FAILURE() << "Found unknown stream type.";
 168       }
 169     }
 170   }
 171
 172   void Flush() {
 173     if (has_audio()) {
 174       audio_packets_.flush();
 175       avcodec_flush_buffers(av_audio_context());
 176     }
 177     if (has_video()) {
 178       video_packets_.flush();
 179       avcodec_flush_buffers(av_video_context());
 180     }
 181   }
 182
 183   void ReadUntil(int64 time) {
 184     while (true) {
 185       scoped_ptr<AVPacket> packet(new AVPacket());
 186       if (av_read_frame(av_format_context_, packet.get()) < 0) {
 187         break;
 188       }
 189
 190       int stream_index = static_cast<int>(packet->stream_index);
 191       int64 packet_time = AV_NOPTS_VALUE;
 192       if (stream_index == audio_stream_index_) {
 193         packet_time =
 194             ConvertFromTimeBase(av_audio_stream()->time_base, packet->pts)
 195                 .InMicroseconds();
 196         audio_packets_.push(packet.release());
 197       } else if (stream_index == video_stream_index_) {
 198         packet_time =
 199             ConvertFromTimeBase(av_video_stream()->time_base, packet->pts)
 200                 .InMicroseconds();
 201         video_packets_.push(packet.release());
 202       } else {
 203         ADD_FAILURE() << "Found packet that belongs to unknown stream.";
 204       }
 205
 206       if (packet_time > time) {
 207         break;
 208       }
 209     }
 210   }
 211
 212   void ReadRemainingFile() {
 213     ReadUntil(std::numeric_limits<int64>::max());
 214   }
 215
 216   bool StepDecodeAudio() {
 217     EXPECT_TRUE(has_audio());
 218     if (!has_audio() || audio_packets_.empty()) {
 219       return false;
 220     }
 221
 222     // Decode until output is produced, end of stream, or error.
 223     while (true) {
 224       int result = 0;
 225       int got_audio = 0;
 226       bool end_of_stream = false;
 227
 228       AVPacket packet;
 229       if (audio_packets_.empty()) {
 230         av_init_packet(&packet);
 231         end_of_stream = true;
 232       } else {
 233         memcpy(&packet, audio_packets_.peek(), sizeof(packet));
 234       }
 235
 236       avcodec_get_frame_defaults(audio_buffer_.get());
 237       result = avcodec_decode_audio4(av_audio_context(), audio_buffer_.get(),
 238                                      &got_audio, &packet);
 239       if (!audio_packets_.empty()) {
 240         audio_packets_.pop();
 241       }
 242
 243       EXPECT_GE(result, 0) << "Audio decode error.";
 244       if (result < 0 || (got_audio == 0 && end_of_stream)) {
 245         return false;
 246       }
 247
 248       if (result > 0) {
 249         double microseconds = 1.0L * audio_buffer_->nb_samples /
 250             av_audio_context()->sample_rate *
 251             base::Time::kMicrosecondsPerSecond;
 252         decoded_audio_duration_ = static_cast<int64>(microseconds);
 253
 254         if (packet.pts == static_cast<int64>(AV_NOPTS_VALUE)) {
 255           EXPECT_NE(decoded_audio_time_, static_cast<int64>(AV_NOPTS_VALUE))
 256               << "We never received an initial timestamped audio packet! "
 257               << "Looks like there's a seeking/parsing bug in FFmpeg.";
 258           decoded_audio_time_ += decoded_audio_duration_;
 259         } else {
 260           decoded_audio_time_ =
 261               ConvertFromTimeBase(av_audio_stream()->time_base, packet.pts)
 262                   .InMicroseconds();
 263         }
 264         return true;
 265       }
 266     }
 267     return true;
 268   }
 269
 270   bool StepDecodeVideo() {
 271     EXPECT_TRUE(has_video());
 272     if (!has_video() || video_packets_.empty()) {
 273       return false;
 274     }
 275
 276     // Decode until output is produced, end of stream, or error.
 277     while (true) {
 278       int result = 0;
 279       int got_picture = 0;
 280       bool end_of_stream = false;
 281
 282       AVPacket packet;
 283       if (video_packets_.empty()) {
 284         av_init_packet(&packet);
 285         end_of_stream = true;
 286       } else {
 287         memcpy(&packet, video_packets_.peek(), sizeof(packet));
 288       }
 289
 290       avcodec_get_frame_defaults(video_buffer_.get());
 291       av_video_context()->reordered_opaque = packet.pts;
 292       result = avcodec_decode_video2(av_video_context(), video_buffer_.get(),
 293                                      &got_picture, &packet);
 294       if (!video_packets_.empty()) {
 295         video_packets_.pop();
 296       }
 297
 298       EXPECT_GE(result, 0) << "Video decode error.";
 299       if (result < 0 || (got_picture == 0 && end_of_stream)) {
 300         return false;
 301       }
 302
 303       if (got_picture) {
 304         AVRational doubled_time_base;
 305         doubled_time_base.den = av_video_stream()->r_frame_rate.num;
 306         doubled_time_base.num = av_video_stream()->r_frame_rate.den;
 307         doubled_time_base.den *= 2;
 308
 309         decoded_video_time_ =
 310             ConvertFromTimeBase(av_video_stream()->time_base,
 311                              video_buffer_->reordered_opaque)
 312                 .InMicroseconds();
 313         decoded_video_duration_ =
 314             ConvertFromTimeBase(doubled_time_base,
 315                              2 + video_buffer_->repeat_pict)
 316                 .InMicroseconds();
 317         return true;
 318       }
 319     }
 320   }
 321
 322   void DecodeRemainingAudio() {
 323     while (StepDecodeAudio()) {}
 324   }
 325
 326   void DecodeRemainingVideo() {
 327     while (StepDecodeVideo()) {}
 328   }
 329
 330   void SeekTo(double position) {
 331     int64 seek_time =
 332         static_cast<int64>(position * base::Time::kMicrosecondsPerSecond);
 333     int flags = AVSEEK_FLAG_BACKWARD;
 334
 335     // Passing -1 as our stream index lets FFmpeg pick a default stream.
 336     // FFmpeg will attempt to use the lowest-index video stream, if present,
 337     // followed by the lowest-index audio stream.
 338     EXPECT_GE(0, av_seek_frame(av_format_context_, -1, seek_time, flags))
 339         << "Failed to seek to position " << position;
 340     Flush();
 341   }
 342
 343   bool has_audio() { return audio_stream_index_ >= 0; }
 344   bool has_video() { return video_stream_index_ >= 0; }
 345   int64 decoded_audio_time() { return decoded_audio_time_; }
 346   int64 decoded_audio_duration() { return decoded_audio_duration_; }
 347   int64 decoded_video_time() { return decoded_video_time_; }
 348   int64 decoded_video_duration() { return decoded_video_duration_; }
 349   int64 duration() { return duration_; }
 350
 351   AVStream* av_audio_stream() {
 352     return av_format_context_->streams[audio_stream_index_];
 353   }
 354   AVStream* av_video_stream() {
 355     return av_format_context_->streams[video_stream_index_];
 356   }
 357   AVCodecContext* av_audio_context() {
 358     return av_audio_stream()->codec;
 359   }
 360   AVCodecContext* av_video_context() {
 361     return av_video_stream()->codec;
 362   }
 363
 364  private:
 365   void InitializeFFmpeg() {
 366     static bool initialized = false;
 367     if (initialized) {
 368       return;
 369     }
 370
 371     base::FilePath path;
 372     PathService::Get(base::DIR_MODULE, &path);
 373     EXPECT_TRUE(InitializeMediaLibrary(path))
 374         << "Could not initialize media library.";
 375
 376     initialized = true;
 377   }
 378
 379   AVFormatContext* av_format_context_;
 380   int audio_stream_index_;
 381   int video_stream_index_;
 382   AVPacketQueue audio_packets_;
 383   AVPacketQueue video_packets_;
 384
 385   scoped_ptr_malloc<AVFrame, media::ScopedPtrAVFree> audio_buffer_;
 386   scoped_ptr_malloc<AVFrame, media::ScopedPtrAVFree> video_buffer_;
 387
 388   int64 decoded_audio_time_;
 389   int64 decoded_audio_duration_;
 390   int64 decoded_video_time_;
 391   int64 decoded_video_duration_;
 392   int64 duration_;
 393
 394   base::MemoryMappedFile file_data_;
 395   scoped_ptr<InMemoryUrlProtocol> protocol_;
 396   scoped_ptr<FFmpegGlue> glue_;
 397
 398   DISALLOW_COPY_AND_ASSIGN(FFmpegTest);
 399 };
 400
 401 #define FFMPEG_TEST_CASE(name, extension) \
 402     INSTANTIATE_TEST_CASE_P(name##_##extension, FFmpegTest, \
 403                             testing::Values(#name "." #extension));
 404
 405 // Covers all our basic formats.
 406 FFMPEG_TEST_CASE(sync0, mp4);
 407 FFMPEG_TEST_CASE(sync0, ogv);
 408 FFMPEG_TEST_CASE(sync0, webm);
 409 FFMPEG_TEST_CASE(sync1, m4a);
 410 FFMPEG_TEST_CASE(sync1, mp3);
 411 FFMPEG_TEST_CASE(sync1, mp4);
 412 FFMPEG_TEST_CASE(sync1, ogg);
 413 FFMPEG_TEST_CASE(sync1, ogv);
 414 FFMPEG_TEST_CASE(sync1, webm);
 415 FFMPEG_TEST_CASE(sync2, m4a);
 416 FFMPEG_TEST_CASE(sync2, mp3);
 417 FFMPEG_TEST_CASE(sync2, mp4);
 418 FFMPEG_TEST_CASE(sync2, ogg);
 419 FFMPEG_TEST_CASE(sync2, ogv);
 420 FFMPEG_TEST_CASE(sync2, webm);
 421
 422 // Covers our LayoutTest file.
 423 FFMPEG_TEST_CASE(counting, ogv);
 424
 425 TEST_P(FFmpegTest, Perf) {
 426   {
 427     PerfTimeLogger timer("Opening file");
 428     OpenFile(GetParam());
 429   }
 430   {
 431     PerfTimeLogger timer("Opening codecs");
 432     OpenCodecs();
 433   }
 434   {
 435     PerfTimeLogger timer("Reading file");
 436     ReadRemainingFile();
 437   }
 438   if (has_audio()) {
 439     PerfTimeLogger timer("Decoding audio");
 440     DecodeRemainingAudio();
 441   }
 442   if (has_video()) {
 443     PerfTimeLogger timer("Decoding video");
 444     DecodeRemainingVideo();
 445   }
 446   {
 447     PerfTimeLogger timer("Seeking to zero");
 448     SeekTo(0);
 449   }
 450 }
 451
 452 TEST_P(FFmpegTest, Loop_Audio) {
 453   OpenAndReadFile(GetParam());
 454   if (!has_audio()) {
 455     return;
 456   }
 457
 458   const int kSteps = 4;
 459   std::vector<int64> expected_timestamps_;
 460   for (int i = 0; i < kSteps; ++i) {
 461     EXPECT_TRUE(StepDecodeAudio());
 462     expected_timestamps_.push_back(decoded_audio_time());
 463   }
 464
 465   SeekTo(0);
 466   ReadRemainingFile();
 467
 468   for (int i = 0; i < kSteps; ++i) {
 469     EXPECT_TRUE(StepDecodeAudio());
 470     EXPECT_EQ(expected_timestamps_[i], decoded_audio_time())
 471         << "Frame " << i << " had a mismatched timestamp.";
 472   }
 473 }
 474
 475 TEST_P(FFmpegTest, Loop_Video) {
 476   OpenAndReadFile(GetParam());
 477   if (!has_video()) {
 478     return;
 479   }
 480
 481   const int kSteps = 4;
 482   std::vector<int64> expected_timestamps_;
 483   for (int i = 0; i < kSteps; ++i) {
 484     EXPECT_TRUE(StepDecodeVideo());
 485     expected_timestamps_.push_back(decoded_video_time());
 486   }
 487
 488   SeekTo(0);
 489   ReadRemainingFile();
 490
 491   for (int i = 0; i < kSteps; ++i) {
 492     EXPECT_TRUE(StepDecodeVideo());
 493     EXPECT_EQ(expected_timestamps_[i], decoded_video_time())
 494         << "Frame " << i << " had a mismatched timestamp.";
 495   }
 496 }
 497
 498 TEST_P(FFmpegTest, Seek_Audio) {
 499   OpenAndReadFile(GetParam());
 500   if (!has_audio() && duration() >= 0.5) {
 501     return;
 502   }
 503
 504   SeekTo(duration() - 0.5);
 505   ReadRemainingFile();
 506
 507   EXPECT_TRUE(StepDecodeAudio());
 508   EXPECT_NE(static_cast<int64>(AV_NOPTS_VALUE), decoded_audio_time());
 509 }
 510
 511 TEST_P(FFmpegTest, Seek_Video) {
 512   OpenAndReadFile(GetParam());
 513   if (!has_video() && duration() >= 0.5) {
 514     return;
 515   }
 516
 517   SeekTo(duration() - 0.5);
 518   ReadRemainingFile();
 519
 520   EXPECT_TRUE(StepDecodeVideo());
 521   EXPECT_NE(static_cast<int64>(AV_NOPTS_VALUE), decoded_video_time());
 522 }
 523
 524 TEST_P(FFmpegTest, Decode_Audio) {
 525   OpenAndReadFile(GetParam());
 526   if (!has_audio()) {
 527     return;
 528   }
 529
 530   int64 last_audio_time = AV_NOPTS_VALUE;
 531   while (StepDecodeAudio()) {
 532     ASSERT_GT(decoded_audio_time(), last_audio_time);
 533     last_audio_time = decoded_audio_time();
 534   }
 535 }
 536
 537 TEST_P(FFmpegTest, Decode_Video) {
 538   OpenAndReadFile(GetParam());
 539   if (!has_video()) {
 540     return;
 541   }
 542
 543   int64 last_video_time = AV_NOPTS_VALUE;
 544   while (StepDecodeVideo()) {
 545     ASSERT_GT(decoded_video_time(), last_video_time);
 546     last_video_time = decoded_video_time();
 547   }
 548 }
 549
 550 TEST_P(FFmpegTest, Duration) {
 551   OpenAndReadFile(GetParam());
 552
 553   if (has_audio()) {
 554     DecodeRemainingAudio();
 555   }
 556
 557   if (has_video()) {
 558     DecodeRemainingVideo();
 559   }
 560
 561   double expected = static_cast<double>(duration());
 562   double actual = static_cast<double>(
 563       std::max(decoded_audio_time() + decoded_audio_duration(),
 564                decoded_video_time() + decoded_video_duration()));
 565   EXPECT_NEAR(expected, actual, 500000)
 566       << "Duration is off by more than 0.5 seconds.";
 567 }
 568
 569 TEST_F(FFmpegTest, VideoPlayedCollapse) {
 570   OpenFile("test.ogv");
 571   OpenCodecs();
 572
 573   SeekTo(0.5);
 574   ReadRemainingFile();
 575   EXPECT_TRUE(StepDecodeVideo());
 576   VLOG(1) << decoded_video_time();
 577
 578   SeekTo(2.83);
 579   ReadRemainingFile();
 580   EXPECT_TRUE(StepDecodeVideo());
 581   VLOG(1) << decoded_video_time();
 582
 583   SeekTo(0.4);
 584   ReadRemainingFile();
 585   EXPECT_TRUE(StepDecodeVideo());
 586   VLOG(1) << decoded_video_time();
 587 }
 588
 589 }  // namespace media