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| 1 // Copyright 2014 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 | |
| 6 #include "content/common/gpu/media/generic_v4l2_device.h" | |
| 7 | |
| 8 #include <errno.h> | |
| 9 #include <fcntl.h> | |
| 10 #include <libdrm/drm_fourcc.h> | |
| 11 #include <linux/videodev2.h> | |
| 12 #include <poll.h> | |
| 13 #include <string.h> | |
| 14 #include <sys/eventfd.h> | |
| 15 #include <sys/ioctl.h> | |
| 16 #include <sys/mman.h> | |
| 17 | |
| 18 #include <memory> | |
| 19 | |
| 20 #include "base/files/scoped_file.h" | |
| 21 #include "base/macros.h" | |
| 22 #include "base/posix/eintr_wrapper.h" | |
| 23 #include "base/trace_event/trace_event.h" | |
| 24 #include "build/build_config.h" | |
| 25 #include "ui/gl/egl_util.h" | |
| 26 #include "ui/gl/gl_bindings.h" | |
| 27 | |
| 28 #if defined(USE_LIBV4L2) | |
| 29 // Auto-generated for dlopen libv4l2 libraries | |
| 30 #include "content/common/gpu/media/v4l2_stubs.h" | |
| 31 #include "third_party/v4l-utils/lib/include/libv4l2.h" | |
| 32 | |
| 33 using content_common_gpu_media::kModuleV4l2; | |
| 34 using content_common_gpu_media::InitializeStubs; | |
| 35 using content_common_gpu_media::StubPathMap; | |
| 36 | |
| 37 static const base::FilePath::CharType kV4l2Lib[] = | |
| 38 FILE_PATH_LITERAL("/usr/lib/libv4l2.so"); | |
| 39 #endif | |
| 40 | |
| 41 namespace content { | |
| 42 | |
| 43 namespace { | |
| 44 const char kDecoderDevice[] = "/dev/video-dec"; | |
| 45 const char kEncoderDevice[] = "/dev/video-enc"; | |
| 46 const char kImageProcessorDevice[] = "/dev/image-proc0"; | |
| 47 const char kJpegDecoderDevice[] = "/dev/jpeg-dec"; | |
| 48 } | |
| 49 | |
| 50 GenericV4L2Device::GenericV4L2Device(Type type) | |
| 51 : V4L2Device(type), | |
| 52 use_libv4l2_(false) { | |
| 53 } | |
| 54 | |
| 55 GenericV4L2Device::~GenericV4L2Device() { | |
| 56 #if defined(USE_LIBV4L2) | |
| 57 if (use_libv4l2_ && device_fd_.is_valid()) | |
| 58 v4l2_close(device_fd_.release()); | |
| 59 #endif | |
| 60 } | |
| 61 | |
| 62 int GenericV4L2Device::Ioctl(int request, void* arg) { | |
| 63 #if defined(USE_LIBV4L2) | |
| 64 if (use_libv4l2_) | |
| 65 return HANDLE_EINTR(v4l2_ioctl(device_fd_.get(), request, arg)); | |
| 66 #endif | |
| 67 return HANDLE_EINTR(ioctl(device_fd_.get(), request, arg)); | |
| 68 } | |
| 69 | |
| 70 bool GenericV4L2Device::Poll(bool poll_device, bool* event_pending) { | |
| 71 struct pollfd pollfds[2]; | |
| 72 nfds_t nfds; | |
| 73 int pollfd = -1; | |
| 74 | |
| 75 pollfds[0].fd = device_poll_interrupt_fd_.get(); | |
| 76 pollfds[0].events = POLLIN | POLLERR; | |
| 77 nfds = 1; | |
| 78 | |
| 79 if (poll_device) { | |
| 80 DVLOG(3) << "Poll(): adding device fd to poll() set"; | |
| 81 pollfds[nfds].fd = device_fd_.get(); | |
| 82 pollfds[nfds].events = POLLIN | POLLOUT | POLLERR | POLLPRI; | |
| 83 pollfd = nfds; | |
| 84 nfds++; | |
| 85 } | |
| 86 | |
| 87 if (HANDLE_EINTR(poll(pollfds, nfds, -1)) == -1) { | |
| 88 DPLOG(ERROR) << "poll() failed"; | |
| 89 return false; | |
| 90 } | |
| 91 *event_pending = (pollfd != -1 && pollfds[pollfd].revents & POLLPRI); | |
| 92 return true; | |
| 93 } | |
| 94 | |
| 95 void* GenericV4L2Device::Mmap(void* addr, | |
| 96 unsigned int len, | |
| 97 int prot, | |
| 98 int flags, | |
| 99 unsigned int offset) { | |
| 100 return mmap(addr, len, prot, flags, device_fd_.get(), offset); | |
| 101 } | |
| 102 | |
| 103 void GenericV4L2Device::Munmap(void* addr, unsigned int len) { | |
| 104 munmap(addr, len); | |
| 105 } | |
| 106 | |
| 107 bool GenericV4L2Device::SetDevicePollInterrupt() { | |
| 108 DVLOG(3) << "SetDevicePollInterrupt()"; | |
| 109 | |
| 110 const uint64_t buf = 1; | |
| 111 if (HANDLE_EINTR(write(device_poll_interrupt_fd_.get(), &buf, sizeof(buf))) == | |
| 112 -1) { | |
| 113 DPLOG(ERROR) << "SetDevicePollInterrupt(): write() failed"; | |
| 114 return false; | |
| 115 } | |
| 116 return true; | |
| 117 } | |
| 118 | |
| 119 bool GenericV4L2Device::ClearDevicePollInterrupt() { | |
| 120 DVLOG(3) << "ClearDevicePollInterrupt()"; | |
| 121 | |
| 122 uint64_t buf; | |
| 123 if (HANDLE_EINTR(read(device_poll_interrupt_fd_.get(), &buf, sizeof(buf))) == | |
| 124 -1) { | |
| 125 if (errno == EAGAIN) { | |
| 126 // No interrupt flag set, and we're reading nonblocking. Not an error. | |
| 127 return true; | |
| 128 } else { | |
| 129 DPLOG(ERROR) << "ClearDevicePollInterrupt(): read() failed"; | |
| 130 return false; | |
| 131 } | |
| 132 } | |
| 133 return true; | |
| 134 } | |
| 135 | |
| 136 bool GenericV4L2Device::Initialize() { | |
| 137 const char* device_path = NULL; | |
| 138 static bool v4l2_functions_initialized = PostSandboxInitialization(); | |
| 139 if (!v4l2_functions_initialized) { | |
| 140 LOG(ERROR) << "Failed to initialize LIBV4L2 libs"; | |
| 141 return false; | |
| 142 } | |
| 143 | |
| 144 switch (type_) { | |
| 145 case kDecoder: | |
| 146 device_path = kDecoderDevice; | |
| 147 break; | |
| 148 case kEncoder: | |
| 149 device_path = kEncoderDevice; | |
| 150 break; | |
| 151 case kImageProcessor: | |
| 152 device_path = kImageProcessorDevice; | |
| 153 break; | |
| 154 case kJpegDecoder: | |
| 155 device_path = kJpegDecoderDevice; | |
| 156 break; | |
| 157 } | |
| 158 | |
| 159 DVLOG(2) << "Initialize(): opening device: " << device_path; | |
| 160 // Open the video device. | |
| 161 device_fd_.reset( | |
| 162 HANDLE_EINTR(open(device_path, O_RDWR | O_NONBLOCK | O_CLOEXEC))); | |
| 163 if (!device_fd_.is_valid()) { | |
| 164 return false; | |
| 165 } | |
| 166 #if defined(USE_LIBV4L2) | |
| 167 if (type_ == kEncoder && | |
| 168 HANDLE_EINTR(v4l2_fd_open(device_fd_.get(), V4L2_DISABLE_CONVERSION)) != | |
| 169 -1) { | |
| 170 DVLOG(2) << "Using libv4l2 for " << device_path; | |
| 171 use_libv4l2_ = true; | |
| 172 } | |
| 173 #endif | |
| 174 | |
| 175 device_poll_interrupt_fd_.reset(eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC)); | |
| 176 if (!device_poll_interrupt_fd_.is_valid()) { | |
| 177 return false; | |
| 178 } | |
| 179 return true; | |
| 180 } | |
| 181 | |
| 182 std::vector<base::ScopedFD> GenericV4L2Device::GetDmabufsForV4L2Buffer( | |
| 183 int index, | |
| 184 size_t num_planes, | |
| 185 enum v4l2_buf_type type) { | |
| 186 DCHECK(V4L2_TYPE_IS_MULTIPLANAR(type)); | |
| 187 | |
| 188 std::vector<base::ScopedFD> dmabuf_fds; | |
| 189 for (size_t i = 0; i < num_planes; ++i) { | |
| 190 struct v4l2_exportbuffer expbuf; | |
| 191 memset(&expbuf, 0, sizeof(expbuf)); | |
| 192 expbuf.type = type; | |
| 193 expbuf.index = index; | |
| 194 expbuf.plane = i; | |
| 195 expbuf.flags = O_CLOEXEC; | |
| 196 if (Ioctl(VIDIOC_EXPBUF, &expbuf) != 0) { | |
| 197 dmabuf_fds.clear(); | |
| 198 break; | |
| 199 } | |
| 200 | |
| 201 dmabuf_fds.push_back(base::ScopedFD(expbuf.fd)); | |
| 202 } | |
| 203 | |
| 204 return dmabuf_fds; | |
| 205 } | |
| 206 | |
| 207 bool GenericV4L2Device::CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) { | |
| 208 static uint32_t kEGLImageDrmFmtsSupported[] = { | |
| 209 DRM_FORMAT_ARGB8888, | |
| 210 #if defined(ARCH_CPU_ARMEL) | |
| 211 DRM_FORMAT_NV12, | |
| 212 #endif | |
| 213 }; | |
| 214 | |
| 215 return std::find( | |
| 216 kEGLImageDrmFmtsSupported, | |
| 217 kEGLImageDrmFmtsSupported + arraysize(kEGLImageDrmFmtsSupported), | |
| 218 V4L2PixFmtToDrmFormat(v4l2_pixfmt)) != | |
| 219 kEGLImageDrmFmtsSupported + arraysize(kEGLImageDrmFmtsSupported); | |
| 220 } | |
| 221 | |
| 222 EGLImageKHR GenericV4L2Device::CreateEGLImage( | |
| 223 EGLDisplay egl_display, | |
| 224 EGLContext /* egl_context */, | |
| 225 GLuint texture_id, | |
| 226 const gfx::Size& size, | |
| 227 unsigned int buffer_index, | |
| 228 uint32_t v4l2_pixfmt, | |
| 229 const std::vector<base::ScopedFD>& dmabuf_fds) { | |
| 230 DVLOG(3) << "CreateEGLImage()"; | |
| 231 if (!CanCreateEGLImageFrom(v4l2_pixfmt)) { | |
| 232 LOG(ERROR) << "Unsupported V4L2 pixel format"; | |
| 233 return EGL_NO_IMAGE_KHR; | |
| 234 } | |
| 235 | |
| 236 media::VideoPixelFormat vf_format = V4L2PixFmtToVideoPixelFormat(v4l2_pixfmt); | |
| 237 // Number of components, as opposed to the number of V4L2 planes, which is | |
| 238 // just a buffer count. | |
| 239 size_t num_planes = media::VideoFrame::NumPlanes(vf_format); | |
| 240 DCHECK_LE(num_planes, 3u); | |
| 241 if (num_planes < dmabuf_fds.size()) { | |
| 242 // It's possible for more than one DRM plane to reside in one V4L2 plane, | |
| 243 // but not the other way around. We must use all V4L2 planes. | |
| 244 LOG(ERROR) << "Invalid plane count"; | |
| 245 return EGL_NO_IMAGE_KHR; | |
| 246 } | |
| 247 | |
| 248 std::vector<EGLint> attrs; | |
| 249 attrs.push_back(EGL_WIDTH); | |
| 250 attrs.push_back(size.width()); | |
| 251 attrs.push_back(EGL_HEIGHT); | |
| 252 attrs.push_back(size.height()); | |
| 253 attrs.push_back(EGL_LINUX_DRM_FOURCC_EXT); | |
| 254 attrs.push_back(V4L2PixFmtToDrmFormat(v4l2_pixfmt)); | |
| 255 | |
| 256 // For existing formats, if we have less buffers (V4L2 planes) than | |
| 257 // components (planes), the remaining planes are stored in the last | |
| 258 // V4L2 plane. Use one V4L2 plane per each component until we run out of V4L2 | |
| 259 // planes, and use the last V4L2 plane for all remaining components, each | |
| 260 // with an offset equal to the size of the preceding planes in the same | |
| 261 // V4L2 plane. | |
| 262 size_t v4l2_plane = 0; | |
| 263 size_t plane_offset = 0; | |
| 264 for (size_t plane = 0; plane < num_planes; ++plane) { | |
| 265 attrs.push_back(EGL_DMA_BUF_PLANE0_FD_EXT + plane * 3); | |
| 266 attrs.push_back(dmabuf_fds[v4l2_plane].get()); | |
| 267 attrs.push_back(EGL_DMA_BUF_PLANE0_OFFSET_EXT + plane * 3); | |
| 268 attrs.push_back(plane_offset); | |
| 269 attrs.push_back(EGL_DMA_BUF_PLANE0_PITCH_EXT + plane * 3); | |
| 270 attrs.push_back( | |
| 271 media::VideoFrame::RowBytes(plane, vf_format, size.width())); | |
| 272 | |
| 273 if (v4l2_plane + 1 < dmabuf_fds.size()) { | |
| 274 ++v4l2_plane; | |
| 275 plane_offset = 0; | |
| 276 } else { | |
| 277 plane_offset += | |
| 278 media::VideoFrame::PlaneSize(vf_format, plane, size).GetArea(); | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 attrs.push_back(EGL_NONE); | |
| 283 | |
| 284 EGLImageKHR egl_image = eglCreateImageKHR( | |
| 285 egl_display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, &attrs[0]); | |
| 286 if (egl_image == EGL_NO_IMAGE_KHR) { | |
| 287 LOG(ERROR) << "Failed creating EGL image: " << ui::GetLastEGLErrorString(); | |
| 288 return egl_image; | |
| 289 } | |
| 290 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture_id); | |
| 291 glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, egl_image); | |
| 292 | |
| 293 return egl_image; | |
| 294 } | |
| 295 | |
| 296 EGLBoolean GenericV4L2Device::DestroyEGLImage(EGLDisplay egl_display, | |
| 297 EGLImageKHR egl_image) { | |
| 298 return eglDestroyImageKHR(egl_display, egl_image); | |
| 299 } | |
| 300 | |
| 301 GLenum GenericV4L2Device::GetTextureTarget() { return GL_TEXTURE_EXTERNAL_OES; } | |
| 302 | |
| 303 uint32_t GenericV4L2Device::PreferredInputFormat() { | |
| 304 // TODO(posciak): We should support "dontcare" returns here once we | |
| 305 // implement proper handling (fallback, negotiation) for this in users. | |
| 306 CHECK_EQ(type_, kEncoder); | |
| 307 return V4L2_PIX_FMT_NV12M; | |
| 308 } | |
| 309 | |
| 310 // static | |
| 311 bool GenericV4L2Device::PostSandboxInitialization() { | |
| 312 #if defined(USE_LIBV4L2) | |
| 313 StubPathMap paths; | |
| 314 paths[kModuleV4l2].push_back(kV4l2Lib); | |
| 315 | |
| 316 return InitializeStubs(paths); | |
| 317 #else | |
| 318 return true; | |
| 319 #endif | |
| 320 } | |
| 321 | |
| 322 } // namespace content | |
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Chromium Code Reviews
Issue 1882373004:
Migrate content/common/gpu/media code to media/gpu (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master