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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 // Implementation of VideoRecorder and FileVideoCapturer. | |
| 29 | |
| 30 #include "webrtc/media/devices/filevideocapturer.h" | |
| 31 | |
| 32 #include "webrtc/base/bytebuffer.h" | |
| 33 #include "webrtc/base/criticalsection.h" | |
| 34 #include "webrtc/base/logging.h" | |
| 35 #include "webrtc/base/thread.h" | |
| 36 | |
| 37 namespace cricket { | |
| 38 | |
| 39 ///////////////////////////////////////////////////////////////////// | |
| 40 // Implementation of class VideoRecorder | |
| 41 ///////////////////////////////////////////////////////////////////// | |
| 42 bool VideoRecorder::Start(const std::string& filename, bool write_header) { | |
| 43 Stop(); | |
| 44 write_header_ = write_header; | |
| 45 int err; | |
| 46 if (!video_file_.Open(filename, "wb", &err)) { | |
| 47 LOG(LS_ERROR) << "Unable to open file " << filename << " err=" << err; | |
| 48 return false; | |
| 49 } | |
| 50 return true; | |
| 51 } | |
| 52 | |
| 53 void VideoRecorder::Stop() { | |
| 54 video_file_.Close(); | |
| 55 } | |
| 56 | |
| 57 bool VideoRecorder::RecordFrame(const CapturedFrame& frame) { | |
| 58 if (rtc::SS_CLOSED == video_file_.GetState()) { | |
| 59 LOG(LS_ERROR) << "File not opened yet"; | |
| 60 return false; | |
| 61 } | |
| 62 | |
| 63 uint32_t size = 0; | |
| 64 if (!frame.GetDataSize(&size)) { | |
| 65 LOG(LS_ERROR) << "Unable to calculate the data size of the frame"; | |
| 66 return false; | |
| 67 } | |
| 68 | |
| 69 if (write_header_) { | |
| 70 // Convert the frame header to bytebuffer. | |
| 71 rtc::ByteBuffer buffer; | |
| 72 buffer.WriteUInt32(frame.width); | |
| 73 buffer.WriteUInt32(frame.height); | |
| 74 buffer.WriteUInt32(frame.fourcc); | |
| 75 buffer.WriteUInt32(frame.pixel_width); | |
| 76 buffer.WriteUInt32(frame.pixel_height); | |
| 77 // Elapsed time is deprecated. | |
| 78 const uint64_t dummy_elapsed_time = 0; | |
| 79 buffer.WriteUInt64(dummy_elapsed_time); | |
| 80 buffer.WriteUInt64(frame.time_stamp); | |
| 81 buffer.WriteUInt32(size); | |
| 82 | |
| 83 // Write the bytebuffer to file. | |
| 84 if (rtc::SR_SUCCESS != video_file_.Write(buffer.Data(), | |
| 85 buffer.Length(), | |
| 86 NULL, | |
| 87 NULL)) { | |
| 88 LOG(LS_ERROR) << "Failed to write frame header"; | |
| 89 return false; | |
| 90 } | |
| 91 } | |
| 92 // Write the frame data to file. | |
| 93 if (rtc::SR_SUCCESS != video_file_.Write(frame.data, | |
| 94 size, | |
| 95 NULL, | |
| 96 NULL)) { | |
| 97 LOG(LS_ERROR) << "Failed to write frame data"; | |
| 98 return false; | |
| 99 } | |
| 100 | |
| 101 return true; | |
| 102 } | |
| 103 | |
| 104 /////////////////////////////////////////////////////////////////////// | |
| 105 // Definition of private class FileReadThread that periodically reads | |
| 106 // frames from a file. | |
| 107 /////////////////////////////////////////////////////////////////////// | |
| 108 class FileVideoCapturer::FileReadThread | |
| 109 : public rtc::Thread, public rtc::MessageHandler { | |
| 110 public: | |
| 111 explicit FileReadThread(FileVideoCapturer* capturer) | |
| 112 : capturer_(capturer), | |
| 113 finished_(false) { | |
| 114 } | |
| 115 | |
| 116 virtual ~FileReadThread() { | |
| 117 Stop(); | |
| 118 } | |
| 119 | |
| 120 // Override virtual method of parent Thread. Context: Worker Thread. | |
| 121 virtual void Run() { | |
| 122 // Read the first frame and start the message pump. The pump runs until | |
| 123 // Stop() is called externally or Quit() is called by OnMessage(). | |
| 124 int waiting_time_ms = 0; | |
| 125 if (capturer_ && capturer_->ReadFrame(true, &waiting_time_ms)) { | |
| 126 PostDelayed(waiting_time_ms, this); | |
| 127 Thread::Run(); | |
| 128 } | |
| 129 | |
| 130 rtc::CritScope cs(&crit_); | |
| 131 finished_ = true; | |
| 132 } | |
| 133 | |
| 134 // Override virtual method of parent MessageHandler. Context: Worker Thread. | |
| 135 virtual void OnMessage(rtc::Message* /*pmsg*/) { | |
| 136 int waiting_time_ms = 0; | |
| 137 if (capturer_ && capturer_->ReadFrame(false, &waiting_time_ms)) { | |
| 138 PostDelayed(waiting_time_ms, this); | |
| 139 } else { | |
| 140 Quit(); | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 // Check if Run() is finished. | |
| 145 bool Finished() const { | |
| 146 rtc::CritScope cs(&crit_); | |
| 147 return finished_; | |
| 148 } | |
| 149 | |
| 150 private: | |
| 151 FileVideoCapturer* capturer_; | |
| 152 rtc::CriticalSection crit_; | |
| 153 bool finished_; | |
| 154 | |
| 155 RTC_DISALLOW_COPY_AND_ASSIGN(FileReadThread); | |
| 156 }; | |
| 157 | |
| 158 ///////////////////////////////////////////////////////////////////// | |
| 159 // Implementation of class FileVideoCapturer | |
| 160 ///////////////////////////////////////////////////////////////////// | |
| 161 static const int64_t kNumNanoSecsPerMilliSec = 1000000; | |
| 162 const char* FileVideoCapturer::kVideoFileDevicePrefix = "video-file:"; | |
| 163 | |
| 164 FileVideoCapturer::FileVideoCapturer() | |
| 165 : frame_buffer_size_(0), | |
| 166 file_read_thread_(NULL), | |
| 167 repeat_(0), | |
| 168 last_frame_timestamp_ns_(0), | |
| 169 ignore_framerate_(false) { | |
| 170 } | |
| 171 | |
| 172 FileVideoCapturer::~FileVideoCapturer() { | |
| 173 Stop(); | |
| 174 delete[] static_cast<char*>(captured_frame_.data); | |
| 175 } | |
| 176 | |
| 177 bool FileVideoCapturer::Init(const Device& device) { | |
| 178 if (!FileVideoCapturer::IsFileVideoCapturerDevice(device)) { | |
| 179 return false; | |
| 180 } | |
| 181 std::string filename(device.name); | |
| 182 if (IsRunning()) { | |
| 183 LOG(LS_ERROR) << "The file video capturer is already running"; | |
| 184 return false; | |
| 185 } | |
| 186 // Open the file. | |
| 187 int err; | |
| 188 if (!video_file_.Open(filename, "rb", &err)) { | |
| 189 LOG(LS_ERROR) << "Unable to open the file " << filename << " err=" << err; | |
| 190 return false; | |
| 191 } | |
| 192 // Read the first frame's header to determine the supported format. | |
| 193 CapturedFrame frame; | |
| 194 if (rtc::SR_SUCCESS != ReadFrameHeader(&frame)) { | |
| 195 LOG(LS_ERROR) << "Failed to read the first frame header"; | |
| 196 video_file_.Close(); | |
| 197 return false; | |
| 198 } | |
| 199 // Seek back to the start of the file. | |
| 200 if (!video_file_.SetPosition(0)) { | |
| 201 LOG(LS_ERROR) << "Failed to seek back to beginning of the file"; | |
| 202 video_file_.Close(); | |
| 203 return false; | |
| 204 } | |
| 205 | |
| 206 // Enumerate the supported formats. We have only one supported format. We set | |
| 207 // the frame interval to kMinimumInterval here. In Start(), if the capture | |
| 208 // format's interval is greater than kMinimumInterval, we use the interval; | |
| 209 // otherwise, we use the timestamp in the file to control the interval. | |
| 210 VideoFormat format(frame.width, frame.height, VideoFormat::kMinimumInterval, | |
| 211 frame.fourcc); | |
| 212 std::vector<VideoFormat> supported; | |
| 213 supported.push_back(format); | |
| 214 | |
| 215 // TODO(thorcarpenter): Report the actual file video format as the supported | |
| 216 // format. Do not use kMinimumInterval as it conflicts with video adaptation. | |
| 217 SetId(device.id); | |
| 218 SetSupportedFormats(supported); | |
| 219 | |
| 220 // TODO(wuwang): Design an E2E integration test for video adaptation, | |
| 221 // then remove the below call to disable the video adapter. | |
| 222 set_enable_video_adapter(false); | |
| 223 return true; | |
| 224 } | |
| 225 | |
| 226 bool FileVideoCapturer::Init(const std::string& filename) { | |
| 227 return Init(FileVideoCapturer::CreateFileVideoCapturerDevice(filename)); | |
| 228 } | |
| 229 | |
| 230 CaptureState FileVideoCapturer::Start(const VideoFormat& capture_format) { | |
| 231 if (IsRunning()) { | |
| 232 LOG(LS_ERROR) << "The file video capturer is already running"; | |
| 233 return CS_FAILED; | |
| 234 } | |
| 235 | |
| 236 if (rtc::SS_CLOSED == video_file_.GetState()) { | |
| 237 LOG(LS_ERROR) << "File not opened yet"; | |
| 238 return CS_NO_DEVICE; | |
| 239 } else if (!video_file_.SetPosition(0)) { | |
| 240 LOG(LS_ERROR) << "Failed to seek back to beginning of the file"; | |
| 241 return CS_FAILED; | |
| 242 } | |
| 243 | |
| 244 SetCaptureFormat(&capture_format); | |
| 245 // Create a thread to read the file. | |
| 246 file_read_thread_ = new FileReadThread(this); | |
| 247 bool ret = file_read_thread_->Start(); | |
| 248 if (ret) { | |
| 249 LOG(LS_INFO) << "File video capturer '" << GetId() << "' started"; | |
| 250 return CS_RUNNING; | |
| 251 } else { | |
| 252 LOG(LS_ERROR) << "File video capturer '" << GetId() << "' failed to start"; | |
| 253 return CS_FAILED; | |
| 254 } | |
| 255 } | |
| 256 | |
| 257 bool FileVideoCapturer::IsRunning() { | |
| 258 return file_read_thread_ && !file_read_thread_->Finished(); | |
| 259 } | |
| 260 | |
| 261 void FileVideoCapturer::Stop() { | |
| 262 if (file_read_thread_) { | |
| 263 file_read_thread_->Stop(); | |
| 264 file_read_thread_ = NULL; | |
| 265 LOG(LS_INFO) << "File video capturer '" << GetId() << "' stopped"; | |
| 266 } | |
| 267 SetCaptureFormat(NULL); | |
| 268 } | |
| 269 | |
| 270 bool FileVideoCapturer::GetPreferredFourccs(std::vector<uint32_t>* fourccs) { | |
| 271 if (!fourccs) { | |
| 272 return false; | |
| 273 } | |
| 274 | |
| 275 fourccs->push_back(GetSupportedFormats()->at(0).fourcc); | |
| 276 return true; | |
| 277 } | |
| 278 | |
| 279 rtc::StreamResult FileVideoCapturer::ReadFrameHeader( | |
| 280 CapturedFrame* frame) { | |
| 281 // We first read kFrameHeaderSize bytes from the file stream to a memory | |
| 282 // buffer, then construct a bytebuffer from the memory buffer, and finally | |
| 283 // read the frame header from the bytebuffer. | |
| 284 char header[CapturedFrame::kFrameHeaderSize]; | |
| 285 rtc::StreamResult sr; | |
| 286 size_t bytes_read; | |
| 287 int error; | |
| 288 sr = video_file_.Read(header, | |
| 289 CapturedFrame::kFrameHeaderSize, | |
| 290 &bytes_read, | |
| 291 &error); | |
| 292 LOG(LS_VERBOSE) << "Read frame header: stream_result = " << sr | |
| 293 << ", bytes read = " << bytes_read << ", error = " << error; | |
| 294 if (rtc::SR_SUCCESS == sr) { | |
| 295 if (CapturedFrame::kFrameHeaderSize != bytes_read) { | |
| 296 return rtc::SR_EOS; | |
| 297 } | |
| 298 rtc::ByteBuffer buffer(header, CapturedFrame::kFrameHeaderSize); | |
| 299 buffer.ReadUInt32(reinterpret_cast<uint32_t*>(&frame->width)); | |
| 300 buffer.ReadUInt32(reinterpret_cast<uint32_t*>(&frame->height)); | |
| 301 buffer.ReadUInt32(&frame->fourcc); | |
| 302 buffer.ReadUInt32(&frame->pixel_width); | |
| 303 buffer.ReadUInt32(&frame->pixel_height); | |
| 304 // Elapsed time is deprecated. | |
| 305 uint64_t dummy_elapsed_time; | |
| 306 buffer.ReadUInt64(&dummy_elapsed_time); | |
| 307 buffer.ReadUInt64(reinterpret_cast<uint64_t*>(&frame->time_stamp)); | |
| 308 buffer.ReadUInt32(&frame->data_size); | |
| 309 } | |
| 310 | |
| 311 return sr; | |
| 312 } | |
| 313 | |
| 314 // Executed in the context of FileReadThread. | |
| 315 bool FileVideoCapturer::ReadFrame(bool first_frame, int* wait_time_ms) { | |
| 316 uint32_t start_read_time_ms = rtc::Time(); | |
| 317 | |
| 318 // 1. Signal the previously read frame to downstream. | |
| 319 if (!first_frame) { | |
| 320 captured_frame_.time_stamp = | |
| 321 kNumNanoSecsPerMilliSec * static_cast<int64_t>(start_read_time_ms); | |
| 322 SignalFrameCaptured(this, &captured_frame_); | |
| 323 } | |
| 324 | |
| 325 // 2. Read the next frame. | |
| 326 if (rtc::SS_CLOSED == video_file_.GetState()) { | |
| 327 LOG(LS_ERROR) << "File not opened yet"; | |
| 328 return false; | |
| 329 } | |
| 330 // 2.1 Read the frame header. | |
| 331 rtc::StreamResult result = ReadFrameHeader(&captured_frame_); | |
| 332 if (rtc::SR_EOS == result) { // Loop back if repeat. | |
| 333 if (repeat_ != kForever) { | |
| 334 if (repeat_ > 0) { | |
| 335 --repeat_; | |
| 336 } else { | |
| 337 return false; | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 if (video_file_.SetPosition(0)) { | |
| 342 result = ReadFrameHeader(&captured_frame_); | |
| 343 } | |
| 344 } | |
| 345 if (rtc::SR_SUCCESS != result) { | |
| 346 LOG(LS_ERROR) << "Failed to read the frame header"; | |
| 347 return false; | |
| 348 } | |
| 349 // 2.2 Reallocate memory for the frame data if necessary. | |
| 350 if (frame_buffer_size_ < captured_frame_.data_size) { | |
| 351 frame_buffer_size_ = captured_frame_.data_size; | |
| 352 delete[] static_cast<char*>(captured_frame_.data); | |
| 353 captured_frame_.data = new char[frame_buffer_size_]; | |
| 354 } | |
| 355 // 2.3 Read the frame adata. | |
| 356 if (rtc::SR_SUCCESS != video_file_.Read(captured_frame_.data, | |
| 357 captured_frame_.data_size, | |
| 358 NULL, NULL)) { | |
| 359 LOG(LS_ERROR) << "Failed to read frame data"; | |
| 360 return false; | |
| 361 } | |
| 362 | |
| 363 // 3. Decide how long to wait for the next frame. | |
| 364 *wait_time_ms = 0; | |
| 365 | |
| 366 // If the capture format's interval is not kMinimumInterval, we use it to | |
| 367 // control the rate; otherwise, we use the timestamp in the file to control | |
| 368 // the rate. | |
| 369 if (!first_frame && !ignore_framerate_) { | |
| 370 int64_t interval_ns = | |
| 371 GetCaptureFormat()->interval > VideoFormat::kMinimumInterval | |
| 372 ? GetCaptureFormat()->interval | |
| 373 : captured_frame_.time_stamp - last_frame_timestamp_ns_; | |
| 374 int interval_ms = static_cast<int>(interval_ns / kNumNanoSecsPerMilliSec); | |
| 375 interval_ms -= rtc::Time() - start_read_time_ms; | |
| 376 if (interval_ms > 0) { | |
| 377 *wait_time_ms = interval_ms; | |
| 378 } | |
| 379 } | |
| 380 // Keep the original timestamp read from the file. | |
| 381 last_frame_timestamp_ns_ = captured_frame_.time_stamp; | |
| 382 return true; | |
| 383 } | |
| 384 | |
| 385 } // namespace cricket | |
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Chromium Code Reviews
Issue 1676503002:
Remove fake cricket::VideoCapturer devices. (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master