Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018, 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_NDEBUG 0 |
| 18 | #define LOG_TAG "Codec2BufferUtils" |
| 19 | #include <utils/Log.h> |
| 20 | |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 21 | #include <libyuv.h> |
| 22 | |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 23 | #include <list> |
| 24 | #include <mutex> |
| 25 | |
| 26 | #include <media/hardware/HardwareAPI.h> |
| 27 | #include <media/stagefright/foundation/AUtils.h> |
| 28 | |
| 29 | #include <C2Debug.h> |
| 30 | |
| 31 | #include "Codec2BufferUtils.h" |
| 32 | |
| 33 | namespace android { |
| 34 | |
| 35 | namespace { |
| 36 | |
| 37 | /** |
| 38 | * A flippable, optimizable memcpy. Constructs such as (from ? src : dst) do not work as the results are |
| 39 | * always const. |
| 40 | */ |
| 41 | template<bool ToA, size_t S> |
| 42 | struct MemCopier { |
| 43 | template<typename A, typename B> |
| 44 | inline static void copy(A *a, const B *b, size_t size) { |
| 45 | __builtin_memcpy(a, b, size); |
| 46 | } |
| 47 | }; |
| 48 | |
| 49 | template<size_t S> |
| 50 | struct MemCopier<false, S> { |
| 51 | template<typename A, typename B> |
| 52 | inline static void copy(const A *a, B *b, size_t size) { |
| 53 | MemCopier<true, S>::copy(b, a, size); |
| 54 | } |
| 55 | }; |
| 56 | |
| 57 | /** |
| 58 | * Copies between a MediaImage and a graphic view. |
| 59 | * |
| 60 | * \param ToMediaImage whether to copy to (or from) the MediaImage |
| 61 | * \param view graphic view (could be ConstGraphicView or GraphicView depending on direction) |
| 62 | * \param img MediaImage data |
| 63 | * \param imgBase base of MediaImage (could be const uint8_t* or uint8_t* depending on direction) |
| 64 | */ |
| 65 | template<bool ToMediaImage, typename View, typename ImagePixel> |
| 66 | static status_t _ImageCopy(View &view, const MediaImage2 *img, ImagePixel *imgBase) { |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 67 | // TODO: more efficient copying --- e.g. copy interleaved planes together, etc. |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 68 | const C2PlanarLayout &layout = view.layout(); |
| 69 | const size_t bpp = divUp(img->mBitDepthAllocated, 8u); |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 70 | |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 71 | for (uint32_t i = 0; i < layout.numPlanes; ++i) { |
| 72 | typename std::conditional<ToMediaImage, uint8_t, const uint8_t>::type *imgRow = |
| 73 | imgBase + img->mPlane[i].mOffset; |
| 74 | typename std::conditional<ToMediaImage, const uint8_t, uint8_t>::type *viewRow = |
| 75 | viewRow = view.data()[i]; |
| 76 | const C2PlaneInfo &plane = layout.planes[i]; |
| 77 | if (plane.colSampling != img->mPlane[i].mHorizSubsampling |
| 78 | || plane.rowSampling != img->mPlane[i].mVertSubsampling |
| 79 | || plane.allocatedDepth != img->mBitDepthAllocated |
| 80 | || plane.allocatedDepth < plane.bitDepth |
| 81 | // MediaImage only supports MSB values |
| 82 | || plane.rightShift != plane.allocatedDepth - plane.bitDepth |
| 83 | || (bpp > 1 && plane.endianness != plane.NATIVE)) { |
| 84 | return BAD_VALUE; |
| 85 | } |
| 86 | |
| 87 | uint32_t planeW = img->mWidth / plane.colSampling; |
| 88 | uint32_t planeH = img->mHeight / plane.rowSampling; |
Pawin Vongmasa | 8be9311 | 2018-12-11 14:01:42 -0800 | [diff] [blame] | 89 | |
| 90 | bool canCopyByRow = (plane.colInc == 1) && (img->mPlane[i].mColInc == 1); |
| 91 | bool canCopyByPlane = canCopyByRow && (plane.rowInc == img->mPlane[i].mRowInc); |
| 92 | if (canCopyByPlane) { |
| 93 | MemCopier<ToMediaImage, 0>::copy(imgRow, viewRow, plane.rowInc * planeH); |
| 94 | } else if (canCopyByRow) { |
| 95 | for (uint32_t row = 0; row < planeH; ++row) { |
| 96 | MemCopier<ToMediaImage, 0>::copy( |
| 97 | imgRow, viewRow, std::min(plane.rowInc, img->mPlane[i].mRowInc)); |
| 98 | imgRow += img->mPlane[i].mRowInc; |
| 99 | viewRow += plane.rowInc; |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 100 | } |
Pawin Vongmasa | 8be9311 | 2018-12-11 14:01:42 -0800 | [diff] [blame] | 101 | } else { |
| 102 | for (uint32_t row = 0; row < planeH; ++row) { |
| 103 | decltype(imgRow) imgPtr = imgRow; |
| 104 | decltype(viewRow) viewPtr = viewRow; |
| 105 | for (uint32_t col = 0; col < planeW; ++col) { |
| 106 | MemCopier<ToMediaImage, 0>::copy(imgPtr, viewPtr, bpp); |
| 107 | imgPtr += img->mPlane[i].mColInc; |
| 108 | viewPtr += plane.colInc; |
| 109 | } |
| 110 | imgRow += img->mPlane[i].mRowInc; |
| 111 | viewRow += plane.rowInc; |
| 112 | } |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 113 | } |
| 114 | } |
| 115 | return OK; |
| 116 | } |
| 117 | |
| 118 | } // namespace |
| 119 | |
| 120 | status_t ImageCopy(uint8_t *imgBase, const MediaImage2 *img, const C2GraphicView &view) { |
Harish Mahendrakar | f7c49e2 | 2019-05-24 14:19:16 -0700 | [diff] [blame] | 121 | if (view.crop().width != img->mWidth || view.crop().height != img->mHeight) { |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 122 | return BAD_VALUE; |
| 123 | } |
| 124 | if ((IsNV12(view) && IsI420(img)) || (IsI420(view) && IsNV12(img))) { |
| 125 | // Take shortcuts to use libyuv functions between NV12 and I420 conversion. |
| 126 | const uint8_t* src_y = view.data()[0]; |
| 127 | const uint8_t* src_u = view.data()[1]; |
| 128 | const uint8_t* src_v = view.data()[2]; |
| 129 | int32_t src_stride_y = view.layout().planes[0].rowInc; |
| 130 | int32_t src_stride_u = view.layout().planes[1].rowInc; |
| 131 | int32_t src_stride_v = view.layout().planes[2].rowInc; |
| 132 | uint8_t* dst_y = imgBase + img->mPlane[0].mOffset; |
| 133 | uint8_t* dst_u = imgBase + img->mPlane[1].mOffset; |
| 134 | uint8_t* dst_v = imgBase + img->mPlane[2].mOffset; |
| 135 | int32_t dst_stride_y = img->mPlane[0].mRowInc; |
| 136 | int32_t dst_stride_u = img->mPlane[1].mRowInc; |
| 137 | int32_t dst_stride_v = img->mPlane[2].mRowInc; |
| 138 | if (IsNV12(view) && IsI420(img)) { |
| 139 | if (!libyuv::NV12ToI420(src_y, src_stride_y, src_u, src_stride_u, dst_y, dst_stride_y, |
Wonsik Kim | 7d96631 | 2019-06-04 14:00:49 -0700 | [diff] [blame] | 140 | dst_u, dst_stride_u, dst_v, dst_stride_v, view.crop().width, |
| 141 | view.crop().height)) { |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 142 | return OK; |
| 143 | } |
| 144 | } else { |
| 145 | if (!libyuv::I420ToNV12(src_y, src_stride_y, src_u, src_stride_u, src_v, src_stride_v, |
Wonsik Kim | 7d96631 | 2019-06-04 14:00:49 -0700 | [diff] [blame] | 146 | dst_y, dst_stride_y, dst_u, dst_stride_u, view.crop().width, |
| 147 | view.crop().height)) { |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 148 | return OK; |
| 149 | } |
| 150 | } |
| 151 | } |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 152 | return _ImageCopy<true>(view, img, imgBase); |
| 153 | } |
| 154 | |
| 155 | status_t ImageCopy(C2GraphicView &view, const uint8_t *imgBase, const MediaImage2 *img) { |
Harish Mahendrakar | f7c49e2 | 2019-05-24 14:19:16 -0700 | [diff] [blame] | 156 | if (view.crop().width != img->mWidth || view.crop().height != img->mHeight) { |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 157 | return BAD_VALUE; |
| 158 | } |
| 159 | if ((IsNV12(img) && IsI420(view)) || (IsI420(img) && IsNV12(view))) { |
| 160 | // Take shortcuts to use libyuv functions between NV12 and I420 conversion. |
| 161 | const uint8_t* src_y = imgBase + img->mPlane[0].mOffset; |
| 162 | const uint8_t* src_u = imgBase + img->mPlane[1].mOffset; |
| 163 | const uint8_t* src_v = imgBase + img->mPlane[2].mOffset; |
| 164 | int32_t src_stride_y = img->mPlane[0].mRowInc; |
| 165 | int32_t src_stride_u = img->mPlane[1].mRowInc; |
| 166 | int32_t src_stride_v = img->mPlane[2].mRowInc; |
| 167 | uint8_t* dst_y = view.data()[0]; |
| 168 | uint8_t* dst_u = view.data()[1]; |
| 169 | uint8_t* dst_v = view.data()[2]; |
| 170 | int32_t dst_stride_y = view.layout().planes[0].rowInc; |
| 171 | int32_t dst_stride_u = view.layout().planes[1].rowInc; |
| 172 | int32_t dst_stride_v = view.layout().planes[2].rowInc; |
| 173 | if (IsNV12(img) && IsI420(view)) { |
| 174 | if (!libyuv::NV12ToI420(src_y, src_stride_y, src_u, src_stride_u, dst_y, dst_stride_y, |
| 175 | dst_u, dst_stride_u, dst_v, dst_stride_v, view.width(), |
| 176 | view.height())) { |
| 177 | return OK; |
| 178 | } |
| 179 | } else { |
| 180 | if (!libyuv::I420ToNV12(src_y, src_stride_y, src_u, src_stride_u, src_v, src_stride_v, |
| 181 | dst_y, dst_stride_y, dst_u, dst_stride_u, view.width(), |
| 182 | view.height())) { |
| 183 | return OK; |
| 184 | } |
| 185 | } |
| 186 | } |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 187 | return _ImageCopy<false>(view, img, imgBase); |
| 188 | } |
| 189 | |
| 190 | bool IsYUV420(const C2GraphicView &view) { |
| 191 | const C2PlanarLayout &layout = view.layout(); |
| 192 | return (layout.numPlanes == 3 |
| 193 | && layout.type == C2PlanarLayout::TYPE_YUV |
| 194 | && layout.planes[layout.PLANE_Y].channel == C2PlaneInfo::CHANNEL_Y |
| 195 | && layout.planes[layout.PLANE_Y].allocatedDepth == 8 |
| 196 | && layout.planes[layout.PLANE_Y].bitDepth == 8 |
| 197 | && layout.planes[layout.PLANE_Y].rightShift == 0 |
| 198 | && layout.planes[layout.PLANE_Y].colSampling == 1 |
| 199 | && layout.planes[layout.PLANE_Y].rowSampling == 1 |
| 200 | && layout.planes[layout.PLANE_U].channel == C2PlaneInfo::CHANNEL_CB |
| 201 | && layout.planes[layout.PLANE_U].allocatedDepth == 8 |
| 202 | && layout.planes[layout.PLANE_U].bitDepth == 8 |
| 203 | && layout.planes[layout.PLANE_U].rightShift == 0 |
| 204 | && layout.planes[layout.PLANE_U].colSampling == 2 |
| 205 | && layout.planes[layout.PLANE_U].rowSampling == 2 |
| 206 | && layout.planes[layout.PLANE_V].channel == C2PlaneInfo::CHANNEL_CR |
| 207 | && layout.planes[layout.PLANE_V].allocatedDepth == 8 |
| 208 | && layout.planes[layout.PLANE_V].bitDepth == 8 |
| 209 | && layout.planes[layout.PLANE_V].rightShift == 0 |
| 210 | && layout.planes[layout.PLANE_V].colSampling == 2 |
| 211 | && layout.planes[layout.PLANE_V].rowSampling == 2); |
| 212 | } |
| 213 | |
Pawin Vongmasa | 1f21336 | 2019-01-24 06:59:16 -0800 | [diff] [blame] | 214 | bool IsNV12(const C2GraphicView &view) { |
| 215 | if (!IsYUV420(view)) { |
| 216 | return false; |
| 217 | } |
| 218 | const C2PlanarLayout &layout = view.layout(); |
| 219 | return (layout.rootPlanes == 2 |
| 220 | && layout.planes[layout.PLANE_U].colInc == 2 |
| 221 | && layout.planes[layout.PLANE_U].rootIx == layout.PLANE_U |
| 222 | && layout.planes[layout.PLANE_U].offset == 0 |
| 223 | && layout.planes[layout.PLANE_V].colInc == 2 |
| 224 | && layout.planes[layout.PLANE_V].rootIx == layout.PLANE_U |
| 225 | && layout.planes[layout.PLANE_V].offset == 1); |
| 226 | } |
| 227 | |
| 228 | bool IsI420(const C2GraphicView &view) { |
| 229 | if (!IsYUV420(view)) { |
| 230 | return false; |
| 231 | } |
| 232 | const C2PlanarLayout &layout = view.layout(); |
| 233 | return (layout.rootPlanes == 3 |
| 234 | && layout.planes[layout.PLANE_U].colInc == 1 |
| 235 | && layout.planes[layout.PLANE_U].rootIx == layout.PLANE_U |
| 236 | && layout.planes[layout.PLANE_U].offset == 0 |
| 237 | && layout.planes[layout.PLANE_V].colInc == 1 |
| 238 | && layout.planes[layout.PLANE_V].rootIx == layout.PLANE_V |
| 239 | && layout.planes[layout.PLANE_V].offset == 0); |
| 240 | } |
| 241 | |
| 242 | bool IsYUV420(const MediaImage2 *img) { |
| 243 | return (img->mType == MediaImage2::MEDIA_IMAGE_TYPE_YUV |
| 244 | && img->mNumPlanes == 3 |
| 245 | && img->mBitDepth == 8 |
| 246 | && img->mBitDepthAllocated == 8 |
| 247 | && img->mPlane[0].mHorizSubsampling == 1 |
| 248 | && img->mPlane[0].mVertSubsampling == 1 |
| 249 | && img->mPlane[1].mHorizSubsampling == 2 |
| 250 | && img->mPlane[1].mVertSubsampling == 2 |
| 251 | && img->mPlane[2].mHorizSubsampling == 2 |
| 252 | && img->mPlane[2].mVertSubsampling == 2); |
| 253 | } |
| 254 | |
| 255 | bool IsNV12(const MediaImage2 *img) { |
| 256 | if (!IsYUV420(img)) { |
| 257 | return false; |
| 258 | } |
| 259 | return (img->mPlane[1].mColInc == 2 |
| 260 | && img->mPlane[2].mColInc == 2 |
| 261 | && (img->mPlane[2].mOffset - img->mPlane[1].mOffset == 1)); |
| 262 | } |
| 263 | |
| 264 | bool IsI420(const MediaImage2 *img) { |
| 265 | if (!IsYUV420(img)) { |
| 266 | return false; |
| 267 | } |
| 268 | return (img->mPlane[1].mColInc == 1 |
| 269 | && img->mPlane[2].mColInc == 1 |
| 270 | && img->mPlane[2].mOffset > img->mPlane[1].mOffset); |
| 271 | } |
| 272 | |
Pawin Vongmasa | 3665390 | 2018-11-15 00:10:25 -0800 | [diff] [blame] | 273 | MediaImage2 CreateYUV420PlanarMediaImage2( |
| 274 | uint32_t width, uint32_t height, uint32_t stride, uint32_t vstride) { |
| 275 | return MediaImage2 { |
| 276 | .mType = MediaImage2::MEDIA_IMAGE_TYPE_YUV, |
| 277 | .mNumPlanes = 3, |
| 278 | .mWidth = width, |
| 279 | .mHeight = height, |
| 280 | .mBitDepth = 8, |
| 281 | .mBitDepthAllocated = 8, |
| 282 | .mPlane = { |
| 283 | { |
| 284 | .mOffset = 0, |
| 285 | .mColInc = 1, |
| 286 | .mRowInc = (int32_t)stride, |
| 287 | .mHorizSubsampling = 1, |
| 288 | .mVertSubsampling = 1, |
| 289 | }, |
| 290 | { |
| 291 | .mOffset = stride * vstride, |
| 292 | .mColInc = 1, |
| 293 | .mRowInc = (int32_t)stride / 2, |
| 294 | .mHorizSubsampling = 2, |
| 295 | .mVertSubsampling = 2, |
| 296 | }, |
| 297 | { |
| 298 | .mOffset = stride * vstride * 5 / 4, |
| 299 | .mColInc = 1, |
| 300 | .mRowInc = (int32_t)stride / 2, |
| 301 | .mHorizSubsampling = 2, |
| 302 | .mVertSubsampling = 2, |
| 303 | } |
| 304 | }, |
| 305 | }; |
| 306 | } |
| 307 | |
| 308 | MediaImage2 CreateYUV420SemiPlanarMediaImage2( |
| 309 | uint32_t width, uint32_t height, uint32_t stride, uint32_t vstride) { |
| 310 | return MediaImage2 { |
| 311 | .mType = MediaImage2::MEDIA_IMAGE_TYPE_YUV, |
| 312 | .mNumPlanes = 3, |
| 313 | .mWidth = width, |
| 314 | .mHeight = height, |
| 315 | .mBitDepth = 8, |
| 316 | .mBitDepthAllocated = 8, |
| 317 | .mPlane = { |
| 318 | { |
| 319 | .mOffset = 0, |
| 320 | .mColInc = 1, |
| 321 | .mRowInc = (int32_t)stride, |
| 322 | .mHorizSubsampling = 1, |
| 323 | .mVertSubsampling = 1, |
| 324 | }, |
| 325 | { |
| 326 | .mOffset = stride * vstride, |
| 327 | .mColInc = 2, |
| 328 | .mRowInc = (int32_t)stride, |
| 329 | .mHorizSubsampling = 2, |
| 330 | .mVertSubsampling = 2, |
| 331 | }, |
| 332 | { |
| 333 | .mOffset = stride * vstride + 1, |
| 334 | .mColInc = 2, |
| 335 | .mRowInc = (int32_t)stride, |
| 336 | .mHorizSubsampling = 2, |
| 337 | .mVertSubsampling = 2, |
| 338 | } |
| 339 | }, |
| 340 | }; |
| 341 | } |
| 342 | |
| 343 | status_t ConvertRGBToPlanarYUV( |
| 344 | uint8_t *dstY, size_t dstStride, size_t dstVStride, size_t bufferSize, |
| 345 | const C2GraphicView &src) { |
| 346 | CHECK(dstY != nullptr); |
| 347 | CHECK((src.width() & 1) == 0); |
| 348 | CHECK((src.height() & 1) == 0); |
| 349 | |
| 350 | if (dstStride * dstVStride * 3 / 2 > bufferSize) { |
| 351 | ALOGD("conversion buffer is too small for converting from RGB to YUV"); |
| 352 | return NO_MEMORY; |
| 353 | } |
| 354 | |
| 355 | uint8_t *dstU = dstY + dstStride * dstVStride; |
| 356 | uint8_t *dstV = dstU + (dstStride >> 1) * (dstVStride >> 1); |
| 357 | |
| 358 | const C2PlanarLayout &layout = src.layout(); |
| 359 | const uint8_t *pRed = src.data()[C2PlanarLayout::PLANE_R]; |
| 360 | const uint8_t *pGreen = src.data()[C2PlanarLayout::PLANE_G]; |
| 361 | const uint8_t *pBlue = src.data()[C2PlanarLayout::PLANE_B]; |
| 362 | |
| 363 | #define CLIP3(x,y,z) (((z) < (x)) ? (x) : (((z) > (y)) ? (y) : (z))) |
| 364 | for (size_t y = 0; y < src.height(); ++y) { |
| 365 | for (size_t x = 0; x < src.width(); ++x) { |
| 366 | uint8_t red = *pRed; |
| 367 | uint8_t green = *pGreen; |
| 368 | uint8_t blue = *pBlue; |
| 369 | |
| 370 | // using ITU-R BT.601 conversion matrix |
| 371 | unsigned luma = |
| 372 | CLIP3(0, (((red * 66 + green * 129 + blue * 25) >> 8) + 16), 255); |
| 373 | |
| 374 | dstY[x] = luma; |
| 375 | |
| 376 | if ((x & 1) == 0 && (y & 1) == 0) { |
| 377 | unsigned U = |
| 378 | CLIP3(0, (((-red * 38 - green * 74 + blue * 112) >> 8) + 128), 255); |
| 379 | |
| 380 | unsigned V = |
| 381 | CLIP3(0, (((red * 112 - green * 94 - blue * 18) >> 8) + 128), 255); |
| 382 | |
| 383 | dstU[x >> 1] = U; |
| 384 | dstV[x >> 1] = V; |
| 385 | } |
| 386 | pRed += layout.planes[C2PlanarLayout::PLANE_R].colInc; |
| 387 | pGreen += layout.planes[C2PlanarLayout::PLANE_G].colInc; |
| 388 | pBlue += layout.planes[C2PlanarLayout::PLANE_B].colInc; |
| 389 | } |
| 390 | |
| 391 | if ((y & 1) == 0) { |
| 392 | dstU += dstStride >> 1; |
| 393 | dstV += dstStride >> 1; |
| 394 | } |
| 395 | |
| 396 | pRed -= layout.planes[C2PlanarLayout::PLANE_R].colInc * src.width(); |
| 397 | pGreen -= layout.planes[C2PlanarLayout::PLANE_G].colInc * src.width(); |
| 398 | pBlue -= layout.planes[C2PlanarLayout::PLANE_B].colInc * src.width(); |
| 399 | pRed += layout.planes[C2PlanarLayout::PLANE_R].rowInc; |
| 400 | pGreen += layout.planes[C2PlanarLayout::PLANE_G].rowInc; |
| 401 | pBlue += layout.planes[C2PlanarLayout::PLANE_B].rowInc; |
| 402 | |
| 403 | dstY += dstStride; |
| 404 | } |
| 405 | return OK; |
| 406 | } |
| 407 | |
| 408 | namespace { |
| 409 | |
| 410 | /** |
| 411 | * A block of raw allocated memory. |
| 412 | */ |
| 413 | struct MemoryBlockPoolBlock { |
| 414 | MemoryBlockPoolBlock(size_t size) |
| 415 | : mData(new uint8_t[size]), mSize(mData ? size : 0) { } |
| 416 | |
| 417 | ~MemoryBlockPoolBlock() { |
| 418 | delete[] mData; |
| 419 | } |
| 420 | |
| 421 | const uint8_t *data() const { |
| 422 | return mData; |
| 423 | } |
| 424 | |
| 425 | size_t size() const { |
| 426 | return mSize; |
| 427 | } |
| 428 | |
| 429 | C2_DO_NOT_COPY(MemoryBlockPoolBlock); |
| 430 | |
| 431 | private: |
| 432 | uint8_t *mData; |
| 433 | size_t mSize; |
| 434 | }; |
| 435 | |
| 436 | /** |
| 437 | * A simple raw memory block pool implementation. |
| 438 | */ |
| 439 | struct MemoryBlockPoolImpl { |
| 440 | void release(std::list<MemoryBlockPoolBlock>::const_iterator block) { |
| 441 | std::lock_guard<std::mutex> lock(mMutex); |
| 442 | // return block to free blocks if it is the current size; otherwise, discard |
| 443 | if (block->size() == mCurrentSize) { |
| 444 | mFreeBlocks.splice(mFreeBlocks.begin(), mBlocksInUse, block); |
| 445 | } else { |
| 446 | mBlocksInUse.erase(block); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | std::list<MemoryBlockPoolBlock>::const_iterator fetch(size_t size) { |
| 451 | std::lock_guard<std::mutex> lock(mMutex); |
| 452 | mFreeBlocks.remove_if([size](const MemoryBlockPoolBlock &block) -> bool { |
| 453 | return block.size() != size; |
| 454 | }); |
| 455 | mCurrentSize = size; |
| 456 | if (mFreeBlocks.empty()) { |
| 457 | mBlocksInUse.emplace_front(size); |
| 458 | } else { |
| 459 | mBlocksInUse.splice(mBlocksInUse.begin(), mFreeBlocks, mFreeBlocks.begin()); |
| 460 | } |
| 461 | return mBlocksInUse.begin(); |
| 462 | } |
| 463 | |
| 464 | MemoryBlockPoolImpl() = default; |
| 465 | |
| 466 | C2_DO_NOT_COPY(MemoryBlockPoolImpl); |
| 467 | |
| 468 | private: |
| 469 | std::mutex mMutex; |
| 470 | std::list<MemoryBlockPoolBlock> mFreeBlocks; |
| 471 | std::list<MemoryBlockPoolBlock> mBlocksInUse; |
| 472 | size_t mCurrentSize; |
| 473 | }; |
| 474 | |
| 475 | } // namespace |
| 476 | |
| 477 | struct MemoryBlockPool::Impl : MemoryBlockPoolImpl { |
| 478 | }; |
| 479 | |
| 480 | struct MemoryBlock::Impl { |
| 481 | Impl(std::list<MemoryBlockPoolBlock>::const_iterator block, |
| 482 | std::shared_ptr<MemoryBlockPoolImpl> pool) |
| 483 | : mBlock(block), mPool(pool) { |
| 484 | } |
| 485 | |
| 486 | ~Impl() { |
| 487 | mPool->release(mBlock); |
| 488 | } |
| 489 | |
| 490 | const uint8_t *data() const { |
| 491 | return mBlock->data(); |
| 492 | } |
| 493 | |
| 494 | size_t size() const { |
| 495 | return mBlock->size(); |
| 496 | } |
| 497 | |
| 498 | private: |
| 499 | std::list<MemoryBlockPoolBlock>::const_iterator mBlock; |
| 500 | std::shared_ptr<MemoryBlockPoolImpl> mPool; |
| 501 | }; |
| 502 | |
| 503 | MemoryBlock MemoryBlockPool::fetch(size_t size) { |
| 504 | std::list<MemoryBlockPoolBlock>::const_iterator poolBlock = mImpl->fetch(size); |
| 505 | return MemoryBlock(std::make_shared<MemoryBlock::Impl>( |
| 506 | poolBlock, std::static_pointer_cast<MemoryBlockPoolImpl>(mImpl))); |
| 507 | } |
| 508 | |
| 509 | MemoryBlockPool::MemoryBlockPool() |
| 510 | : mImpl(std::make_shared<MemoryBlockPool::Impl>()) { |
| 511 | } |
| 512 | |
| 513 | MemoryBlock::MemoryBlock(std::shared_ptr<MemoryBlock::Impl> impl) |
| 514 | : mImpl(impl) { |
| 515 | } |
| 516 | |
| 517 | MemoryBlock::MemoryBlock() = default; |
| 518 | |
| 519 | MemoryBlock::~MemoryBlock() = default; |
| 520 | |
| 521 | const uint8_t* MemoryBlock::data() const { |
| 522 | return mImpl ? mImpl->data() : nullptr; |
| 523 | } |
| 524 | |
| 525 | size_t MemoryBlock::size() const { |
| 526 | return mImpl ? mImpl->size() : 0; |
| 527 | } |
| 528 | |
| 529 | MemoryBlock MemoryBlock::Allocate(size_t size) { |
| 530 | return MemoryBlockPool().fetch(size); |
| 531 | } |
| 532 | |
| 533 | } // namespace android |