Scott Randolph | b342cb1 | 2017-04-25 17:38:29 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "android.hardware.automotive.evs@1.0-display" |
| 18 | |
| 19 | #include "EvsV4lCamera.h" |
| 20 | #include "EvsEnumerator.h" |
| 21 | #include "bufferCopy.h" |
| 22 | |
| 23 | #include <ui/GraphicBufferAllocator.h> |
| 24 | #include <ui/GraphicBufferMapper.h> |
| 25 | |
| 26 | |
| 27 | namespace android { |
| 28 | namespace hardware { |
| 29 | namespace automotive { |
| 30 | namespace evs { |
| 31 | namespace V1_0 { |
| 32 | namespace implementation { |
| 33 | |
| 34 | |
| 35 | // Arbitrary limit on number of graphics buffers allowed to be allocated |
| 36 | // Safeguards against unreasonable resource consumption and provides a testable limit |
| 37 | static const unsigned MAX_BUFFERS_IN_FLIGHT = 100; |
| 38 | |
| 39 | |
| 40 | EvsV4lCamera::EvsV4lCamera(const char *deviceName) : |
| 41 | mFramesAllowed(0), |
| 42 | mFramesInUse(0) { |
| 43 | ALOGD("EvsV4lCamera instantiated"); |
| 44 | |
| 45 | mDescription.cameraId = deviceName; |
| 46 | |
| 47 | // Initialize the video device |
| 48 | if (!mVideo.open(deviceName)) { |
| 49 | ALOGE("Failed to open v4l device %s\n", deviceName); |
| 50 | } |
| 51 | |
| 52 | // NOTE: Our current spec says only support NV21 -- can we stick to that with software |
| 53 | // conversion? Will this work with the hardware texture units? |
| 54 | // TODO: Settle on the one official format that works on all platforms |
| 55 | // TODO: Get NV21 working? It is scrambled somewhere along the way right now. |
| 56 | // mFormat = HAL_PIXEL_FORMAT_YCRCB_420_SP; // 420SP == NV21 |
| 57 | // mFormat = HAL_PIXEL_FORMAT_RGBA_8888; |
| 58 | mFormat = HAL_PIXEL_FORMAT_YCBCR_422_I; |
| 59 | |
| 60 | // How we expect to use the gralloc buffers we'll exchange with our client |
| 61 | mUsage = GRALLOC_USAGE_HW_TEXTURE | |
| 62 | GRALLOC_USAGE_SW_READ_RARELY | |
| 63 | GRALLOC_USAGE_SW_WRITE_OFTEN; |
| 64 | } |
| 65 | |
| 66 | |
| 67 | EvsV4lCamera::~EvsV4lCamera() { |
| 68 | ALOGD("EvsV4lCamera being destroyed"); |
| 69 | shutdown(); |
| 70 | } |
| 71 | |
| 72 | |
| 73 | // |
| 74 | // This gets called if another caller "steals" ownership of the camera |
| 75 | // |
| 76 | void EvsV4lCamera::shutdown() |
| 77 | { |
| 78 | ALOGD("EvsV4lCamera shutdown"); |
| 79 | |
| 80 | // Make sure our output stream is cleaned up |
| 81 | // (It really should be already) |
| 82 | stopVideoStream(); |
| 83 | |
| 84 | // Note: Since stopVideoStream is blocking, no other threads can now be running |
| 85 | |
| 86 | // Close our video capture device |
| 87 | mVideo.close(); |
| 88 | |
| 89 | // Drop all the graphics buffers we've been using |
| 90 | if (mBuffers.size() > 0) { |
| 91 | GraphicBufferAllocator& alloc(GraphicBufferAllocator::get()); |
| 92 | for (auto&& rec : mBuffers) { |
| 93 | if (rec.inUse) { |
| 94 | ALOGW("Error - releasing buffer despite remote ownership"); |
| 95 | } |
| 96 | alloc.free(rec.handle); |
| 97 | rec.handle = nullptr; |
| 98 | } |
| 99 | mBuffers.clear(); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | |
| 104 | // Methods from ::android::hardware::automotive::evs::V1_0::IEvsCamera follow. |
| 105 | Return<void> EvsV4lCamera::getCameraInfo(getCameraInfo_cb _hidl_cb) { |
| 106 | ALOGD("getCameraInfo"); |
| 107 | |
| 108 | // Send back our self description |
| 109 | _hidl_cb(mDescription); |
| 110 | return Void(); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | Return<EvsResult> EvsV4lCamera::setMaxFramesInFlight(uint32_t bufferCount) { |
| 115 | ALOGD("setMaxFramesInFlight"); |
| 116 | std::lock_guard<std::mutex> lock(mAccessLock); |
| 117 | |
| 118 | // If we've been displaced by another owner of the camera, then we can't do anything else |
| 119 | if (!mVideo.isOpen()) { |
| 120 | ALOGW("ignoring setMaxFramesInFlight call when camera has been lost."); |
| 121 | return EvsResult::OWNERSHIP_LOST; |
| 122 | } |
| 123 | |
| 124 | // We cannot function without at least one video buffer to send data |
| 125 | if (bufferCount < 1) { |
| 126 | ALOGE("Ignoring setMaxFramesInFlight with less than one buffer requested"); |
| 127 | return EvsResult::INVALID_ARG; |
| 128 | } |
| 129 | |
| 130 | // Update our internal state |
| 131 | if (setAvailableFrames_Locked(bufferCount)) { |
| 132 | return EvsResult::OK; |
| 133 | } else { |
| 134 | return EvsResult::BUFFER_NOT_AVAILABLE; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | |
| 139 | Return<EvsResult> EvsV4lCamera::startVideoStream(const ::android::sp<IEvsCameraStream>& stream) { |
| 140 | ALOGD("startVideoStream"); |
| 141 | std::lock_guard<std::mutex> lock(mAccessLock); |
| 142 | |
| 143 | // If we've been displaced by another owner of the camera, then we can't do anything else |
| 144 | if (!mVideo.isOpen()) { |
| 145 | ALOGW("ignoring startVideoStream call when camera has been lost."); |
| 146 | return EvsResult::OWNERSHIP_LOST; |
| 147 | } |
| 148 | if (mStream.get() != nullptr) { |
| 149 | ALOGE("ignoring startVideoStream call when a stream is already running."); |
| 150 | return EvsResult::STREAM_ALREADY_RUNNING; |
| 151 | } |
| 152 | |
| 153 | // If the client never indicated otherwise, configure ourselves for a single streaming buffer |
| 154 | if (mFramesAllowed < 1) { |
| 155 | if (!setAvailableFrames_Locked(1)) { |
| 156 | ALOGE("Failed to start stream because we couldn't get a graphics buffer"); |
| 157 | return EvsResult::BUFFER_NOT_AVAILABLE; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | // Choose which image transfer function we need |
| 162 | // Map from V4L2 to Android graphic buffer format |
| 163 | const uint32_t videoSrcFormat = mVideo.getV4LFormat(); |
| 164 | ALOGI("Configuring to accept %4.4s camera data and convert to NV21", (char*)&videoSrcFormat); |
| 165 | |
| 166 | // TODO: Simplify this by supporting only ONE fixed output format |
| 167 | switch (mFormat) { |
| 168 | case HAL_PIXEL_FORMAT_YCRCB_420_SP: |
| 169 | switch (videoSrcFormat) { |
| 170 | case V4L2_PIX_FMT_NV21: mFillBufferFromVideo = fillNV21FromNV21; break; |
| 171 | // case V4L2_PIX_FMT_YV12: mFillBufferFromVideo = fillNV21FromYV12; break; |
| 172 | case V4L2_PIX_FMT_YUYV: mFillBufferFromVideo = fillNV21FromYUYV; break; |
| 173 | // case V4L2_PIX_FORMAT_NV16: mFillBufferFromVideo = fillNV21FromNV16; break; |
| 174 | default: |
| 175 | // TODO: Are there other V4L2 formats we must support? |
| 176 | ALOGE("Unhandled camera output format %c%c%c%c (0x%8X)\n", |
| 177 | ((char*)&videoSrcFormat)[0], |
| 178 | ((char*)&videoSrcFormat)[1], |
| 179 | ((char*)&videoSrcFormat)[2], |
| 180 | ((char*)&videoSrcFormat)[3], |
| 181 | videoSrcFormat); |
| 182 | } |
| 183 | break; |
| 184 | case HAL_PIXEL_FORMAT_RGBA_8888: |
| 185 | switch (videoSrcFormat) { |
| 186 | case V4L2_PIX_FMT_YUYV: mFillBufferFromVideo = fillRGBAFromYUYV; break; |
| 187 | default: |
| 188 | // TODO: Are there other V4L2 formats we must support? |
| 189 | ALOGE("Unhandled camera format %4.4s", (char*)&videoSrcFormat); |
| 190 | } |
| 191 | break; |
| 192 | case HAL_PIXEL_FORMAT_YCBCR_422_I: |
| 193 | switch (videoSrcFormat) { |
| 194 | case V4L2_PIX_FMT_YUYV: mFillBufferFromVideo = fillYUYVFromYUYV; break; |
| 195 | default: |
| 196 | // TODO: Are there other V4L2 formats we must support? |
| 197 | ALOGE("Unhandled camera format %4.4s", (char*)&videoSrcFormat); |
| 198 | } |
| 199 | break; |
| 200 | default: |
| 201 | // TODO: Why have we told ourselves to output something we don't understand!? |
| 202 | ALOGE("Unhandled output format %4.4s", (char*)&mFormat); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | // Record the user's callback for use when we have a frame ready |
| 207 | mStream = stream; |
| 208 | |
| 209 | // Set up the video stream with a callback to our member function forwardFrame() |
| 210 | if (!mVideo.startStream([this](VideoCapture*, imageBuffer* tgt, void* data) { |
| 211 | this->forwardFrame(tgt, data); |
| 212 | }) |
| 213 | ) { |
| 214 | mStream = nullptr; // No need to hold onto this if we failed to start |
| 215 | ALOGE("underlying camera start stream failed"); |
| 216 | return EvsResult::UNDERLYING_SERVICE_ERROR; |
| 217 | } |
| 218 | |
| 219 | return EvsResult::OK; |
| 220 | } |
| 221 | |
| 222 | |
| 223 | Return<void> EvsV4lCamera::doneWithFrame(const BufferDesc& buffer) { |
| 224 | ALOGD("doneWithFrame"); |
| 225 | std::lock_guard <std::mutex> lock(mAccessLock); |
| 226 | |
| 227 | // If we've been displaced by another owner of the camera, then we can't do anything else |
| 228 | if (!mVideo.isOpen()) { |
| 229 | ALOGW("ignoring doneWithFrame call when camera has been lost."); |
| 230 | } else { |
| 231 | if (buffer.memHandle == nullptr) { |
| 232 | ALOGE("ignoring doneWithFrame called with null handle"); |
| 233 | } else if (buffer.bufferId >= mBuffers.size()) { |
| 234 | ALOGE("ignoring doneWithFrame called with invalid bufferId %d (max is %zu)", |
| 235 | buffer.bufferId, mBuffers.size()-1); |
| 236 | } else if (!mBuffers[buffer.bufferId].inUse) { |
| 237 | ALOGE("ignoring doneWithFrame called on frame %d which is already free", |
| 238 | buffer.bufferId); |
| 239 | } else { |
| 240 | // Mark the frame as available |
| 241 | mBuffers[buffer.bufferId].inUse = false; |
| 242 | mFramesInUse--; |
| 243 | |
| 244 | // If this frame's index is high in the array, try to move it down |
| 245 | // to improve locality after mFramesAllowed has been reduced. |
| 246 | if (buffer.bufferId >= mFramesAllowed) { |
| 247 | // Find an empty slot lower in the array (which should always exist in this case) |
| 248 | for (auto&& rec : mBuffers) { |
| 249 | if (rec.handle == nullptr) { |
| 250 | rec.handle = mBuffers[buffer.bufferId].handle; |
| 251 | mBuffers[buffer.bufferId].handle = nullptr; |
| 252 | break; |
| 253 | } |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | return Void(); |
| 260 | } |
| 261 | |
| 262 | |
| 263 | Return<void> EvsV4lCamera::stopVideoStream() { |
| 264 | ALOGD("stopVideoStream"); |
| 265 | |
| 266 | // Tell the capture device to stop (and block until it does) |
| 267 | mVideo.stopStream(); |
| 268 | |
| 269 | if (mStream != nullptr) { |
| 270 | std::unique_lock <std::mutex> lock(mAccessLock); |
| 271 | |
| 272 | // Send one last NULL frame to signal the actual end of stream |
| 273 | BufferDesc nullBuff = {}; |
| 274 | auto result = mStream->deliverFrame(nullBuff); |
| 275 | if (!result.isOk()) { |
| 276 | ALOGE("Error delivering end of stream marker"); |
| 277 | } |
| 278 | |
| 279 | // Drop our reference to the client's stream receiver |
| 280 | mStream = nullptr; |
| 281 | } |
| 282 | |
| 283 | return Void(); |
| 284 | } |
| 285 | |
| 286 | |
| 287 | Return<int32_t> EvsV4lCamera::getExtendedInfo(uint32_t /*opaqueIdentifier*/) { |
| 288 | ALOGD("getExtendedInfo"); |
| 289 | // Return zero by default as required by the spec |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | |
| 294 | Return<EvsResult> EvsV4lCamera::setExtendedInfo(uint32_t /*opaqueIdentifier*/, |
| 295 | int32_t /*opaqueValue*/) { |
| 296 | ALOGD("setExtendedInfo"); |
| 297 | std::lock_guard<std::mutex> lock(mAccessLock); |
| 298 | |
| 299 | // If we've been displaced by another owner of the camera, then we can't do anything else |
| 300 | if (!mVideo.isOpen()) { |
| 301 | ALOGW("ignoring setExtendedInfo call when camera has been lost."); |
| 302 | return EvsResult::OWNERSHIP_LOST; |
| 303 | } |
| 304 | |
| 305 | // We don't store any device specific information in this implementation |
| 306 | return EvsResult::INVALID_ARG; |
| 307 | } |
| 308 | |
| 309 | |
| 310 | bool EvsV4lCamera::setAvailableFrames_Locked(unsigned bufferCount) { |
| 311 | if (bufferCount < 1) { |
| 312 | ALOGE("Ignoring request to set buffer count to zero"); |
| 313 | return false; |
| 314 | } |
| 315 | if (bufferCount > MAX_BUFFERS_IN_FLIGHT) { |
| 316 | ALOGE("Rejecting buffer request in excess of internal limit"); |
| 317 | return false; |
| 318 | } |
| 319 | |
| 320 | // Is an increase required? |
| 321 | if (mFramesAllowed < bufferCount) { |
| 322 | // An increase is required |
| 323 | unsigned needed = bufferCount - mFramesAllowed; |
| 324 | ALOGI("Allocating %d buffers for camera frames", needed); |
| 325 | |
| 326 | unsigned added = increaseAvailableFrames_Locked(needed); |
| 327 | if (added != needed) { |
| 328 | // If we didn't add all the frames we needed, then roll back to the previous state |
| 329 | ALOGE("Rolling back to previous frame queue size"); |
| 330 | decreaseAvailableFrames_Locked(added); |
| 331 | return false; |
| 332 | } |
| 333 | } else if (mFramesAllowed > bufferCount) { |
| 334 | // A decrease is required |
| 335 | unsigned framesToRelease = mFramesAllowed - bufferCount; |
| 336 | ALOGI("Returning %d camera frame buffers", framesToRelease); |
| 337 | |
| 338 | unsigned released = decreaseAvailableFrames_Locked(framesToRelease); |
| 339 | if (released != framesToRelease) { |
| 340 | // This shouldn't happen with a properly behaving client because the client |
| 341 | // should only make this call after returning sufficient outstanding buffers |
| 342 | // to allow a clean resize. |
| 343 | ALOGE("Buffer queue shrink failed -- too many buffers currently in use?"); |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | return true; |
| 348 | } |
| 349 | |
| 350 | |
| 351 | unsigned EvsV4lCamera::increaseAvailableFrames_Locked(unsigned numToAdd) { |
| 352 | // Acquire the graphics buffer allocator |
| 353 | GraphicBufferAllocator &alloc(GraphicBufferAllocator::get()); |
| 354 | |
| 355 | unsigned added = 0; |
| 356 | |
| 357 | |
| 358 | while (added < numToAdd) { |
| 359 | unsigned pixelsPerLine; |
| 360 | buffer_handle_t memHandle = nullptr; |
| 361 | status_t result = alloc.allocate(mVideo.getWidth(), mVideo.getHeight(), |
| 362 | mFormat, 1, |
| 363 | mUsage, |
| 364 | &memHandle, &pixelsPerLine, 0, "EvsV4lCamera"); |
| 365 | if (result != NO_ERROR) { |
| 366 | ALOGE("Error %d allocating %d x %d graphics buffer", |
| 367 | result, |
| 368 | mVideo.getWidth(), |
| 369 | mVideo.getHeight()); |
| 370 | break; |
| 371 | } |
| 372 | if (!memHandle) { |
| 373 | ALOGE("We didn't get a buffer handle back from the allocator"); |
| 374 | break; |
| 375 | } |
| 376 | if (mStride) { |
| 377 | if (mStride != pixelsPerLine) { |
| 378 | ALOGE("We did not expect to get buffers with different strides!"); |
| 379 | } |
| 380 | } else { |
| 381 | // Gralloc defines stride in terms of pixels per line |
| 382 | mStride = pixelsPerLine; |
| 383 | } |
| 384 | |
| 385 | // Find a place to store the new buffer |
| 386 | bool stored = false; |
| 387 | for (auto&& rec : mBuffers) { |
| 388 | if (rec.handle == nullptr) { |
| 389 | // Use this existing entry |
| 390 | rec.handle = memHandle; |
| 391 | rec.inUse = false; |
| 392 | stored = true; |
| 393 | break; |
| 394 | } |
| 395 | } |
| 396 | if (!stored) { |
| 397 | // Add a BufferRecord wrapping this handle to our set of available buffers |
| 398 | mBuffers.emplace_back(memHandle); |
| 399 | } |
| 400 | |
| 401 | mFramesAllowed++; |
| 402 | added++; |
| 403 | } |
| 404 | |
| 405 | return added; |
| 406 | } |
| 407 | |
| 408 | |
| 409 | unsigned EvsV4lCamera::decreaseAvailableFrames_Locked(unsigned numToRemove) { |
| 410 | // Acquire the graphics buffer allocator |
| 411 | GraphicBufferAllocator &alloc(GraphicBufferAllocator::get()); |
| 412 | |
| 413 | unsigned removed = 0; |
| 414 | |
| 415 | for (auto&& rec : mBuffers) { |
| 416 | // Is this record not in use, but holding a buffer that we can free? |
| 417 | if ((rec.inUse == false) && (rec.handle != nullptr)) { |
| 418 | // Release buffer and update the record so we can recognize it as "empty" |
| 419 | alloc.free(rec.handle); |
| 420 | rec.handle = nullptr; |
| 421 | |
| 422 | mFramesAllowed--; |
| 423 | removed++; |
| 424 | |
| 425 | if (removed == numToRemove) { |
| 426 | break; |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | return removed; |
| 432 | } |
| 433 | |
| 434 | |
| 435 | // This is the async callback from the video camera that tells us a frame is ready |
| 436 | void EvsV4lCamera::forwardFrame(imageBuffer* /*pV4lBuff*/, void* pData) { |
| 437 | bool readyForFrame = false; |
| 438 | size_t idx = 0; |
| 439 | |
| 440 | // Lock scope for updating shared state |
| 441 | { |
| 442 | std::lock_guard<std::mutex> lock(mAccessLock); |
| 443 | |
| 444 | // Are we allowed to issue another buffer? |
| 445 | if (mFramesInUse >= mFramesAllowed) { |
| 446 | // Can't do anything right now -- skip this frame |
| 447 | ALOGW("Skipped a frame because too many are in flight\n"); |
| 448 | } else { |
| 449 | // Identify an available buffer to fill |
| 450 | for (idx = 0; idx < mBuffers.size(); idx++) { |
| 451 | if (!mBuffers[idx].inUse) { |
| 452 | if (mBuffers[idx].handle != nullptr) { |
| 453 | // Found an available record, so stop looking |
| 454 | break; |
| 455 | } |
| 456 | } |
| 457 | } |
| 458 | if (idx >= mBuffers.size()) { |
| 459 | // This shouldn't happen since we already checked mFramesInUse vs mFramesAllowed |
| 460 | ALOGE("Failed to find an available buffer slot\n"); |
| 461 | } else { |
| 462 | // We're going to make the frame busy |
| 463 | mBuffers[idx].inUse = true; |
| 464 | mFramesInUse++; |
| 465 | readyForFrame = true; |
| 466 | } |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | if (!readyForFrame) { |
| 471 | // We need to return the vide buffer so it can capture a new frame |
| 472 | mVideo.markFrameConsumed(); |
| 473 | } else { |
| 474 | // Assemble the buffer description we'll transmit below |
| 475 | BufferDesc buff = {}; |
| 476 | buff.width = mVideo.getWidth(); |
| 477 | buff.height = mVideo.getHeight(); |
| 478 | buff.stride = mStride; |
| 479 | buff.format = mFormat; |
| 480 | buff.usage = mUsage; |
| 481 | buff.bufferId = idx; |
| 482 | buff.memHandle = mBuffers[idx].handle; |
| 483 | |
| 484 | // Lock our output buffer for writing |
| 485 | void *targetPixels = nullptr; |
| 486 | GraphicBufferMapper &mapper = GraphicBufferMapper::get(); |
| 487 | mapper.lock(buff.memHandle, |
| 488 | GRALLOC_USAGE_SW_WRITE_OFTEN | GRALLOC_USAGE_SW_READ_NEVER, |
| 489 | android::Rect(buff.width, buff.height), |
| 490 | (void **) &targetPixels); |
| 491 | |
| 492 | // If we failed to lock the pixel buffer, we're about to crash, but log it first |
| 493 | if (!targetPixels) { |
| 494 | ALOGE("Camera failed to gain access to image buffer for writing"); |
| 495 | } |
| 496 | |
| 497 | // Transfer the video image into the output buffer, making any needed |
| 498 | // format conversion along the way |
| 499 | mFillBufferFromVideo(buff, (uint8_t*)targetPixels, pData, mVideo.getStride()); |
| 500 | |
| 501 | // Unlock the output buffer |
| 502 | mapper.unlock(buff.memHandle); |
| 503 | |
| 504 | |
| 505 | // Give the video frame back to the underlying device for reuse |
| 506 | // Note that we do this before making the client callback to give the underlying |
| 507 | // camera more time to capture the next frame. |
| 508 | mVideo.markFrameConsumed(); |
| 509 | |
| 510 | // Issue the (asynchronous) callback to the client -- can't be holding the lock |
| 511 | auto result = mStream->deliverFrame(buff); |
| 512 | if (result.isOk()) { |
| 513 | ALOGD("Delivered %p as id %d", buff.memHandle.getNativeHandle(), buff.bufferId); |
| 514 | } else { |
| 515 | // This can happen if the client dies and is likely unrecoverable. |
| 516 | // To avoid consuming resources generating failing calls, we stop sending |
| 517 | // frames. Note, however, that the stream remains in the "STREAMING" state |
| 518 | // until cleaned up on the main thread. |
| 519 | ALOGE("Frame delivery call failed in the transport layer."); |
| 520 | |
| 521 | // Since we didn't actually deliver it, mark the frame as available |
| 522 | std::lock_guard<std::mutex> lock(mAccessLock); |
| 523 | mBuffers[idx].inUse = false; |
| 524 | mFramesInUse--; |
| 525 | } |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | } // namespace implementation |
| 530 | } // namespace V1_0 |
| 531 | } // namespace evs |
| 532 | } // namespace automotive |
| 533 | } // namespace hardware |
| 534 | } // namespace android |