git.sesse.net Git - nageru/blob - vaapi_jpeg_decoder.cpp

   1 #include "vaapi_jpeg_decoder.h"
   2
   3 #include <X11/Xlib.h>
   4 #include <assert.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <glob.h>
   8 #include <jpeglib.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <va/va.h>
  14 #include <va/va_drm.h>
  15 #include <va/va_x11.h>
  16
  17 #include <list>
  18 #include <mutex>
  19 #include <string>
  20
  21 #include "jpeg_frame.h"
  22 #include "memcpy_interleaved.h"
  23
  24 using namespace std;
  25
  26 static unique_ptr<VADisplayWithCleanup> va_dpy;
  27 static VAConfigID config_id;
  28 static VAImageFormat uyvy_format;
  29 bool vaapi_jpeg_decoding_usable = false;
  30
  31 struct VAResources {
  32         unsigned width, height;
  33         VASurfaceID surface;
  34         VAContextID context;
  35         VAImage image;
  36 };
  37 static list<VAResources> va_resources_freelist;
  38 static mutex va_resources_mutex;
  39
  40 #define CHECK_VASTATUS(va_status, func)                                 \
  41     if (va_status != VA_STATUS_SUCCESS) {                               \
  42         fprintf(stderr, "%s:%d (%s) failed with %d\n", __func__, __LINE__, func, va_status); \
  43         exit(1);                                                        \
  44     }
  45
  46 #define CHECK_VASTATUS_RET(va_status, func)                             \
  47     if (va_status != VA_STATUS_SUCCESS) {                               \
  48         fprintf(stderr, "%s:%d (%s) failed with %d\n", __func__, __LINE__, func, va_status); \
  49         return nullptr;                                                 \
  50     }
  51
  52 VAResources get_va_resources(unsigned width, unsigned height)
  53 {
  54         {
  55                 lock_guard<mutex> lock(va_resources_mutex);
  56                 for (auto it = va_resources_freelist.begin(); it != va_resources_freelist.end(); ++it) {
  57                         if (it->width == width && it->height == height) {
  58                                 VAResources ret = *it;
  59                                 va_resources_freelist.erase(it);
  60                                 return ret;
  61                         }
  62                 }
  63         }
  64
  65         VAResources ret;
  66
  67         ret.width = width;
  68         ret.height = height;
  69
  70         VAStatus va_status = vaCreateSurfaces(va_dpy->va_dpy, VA_RT_FORMAT_YUV422,
  71                 width, height,
  72                 &ret.surface, 1, nullptr, 0);
  73         CHECK_VASTATUS(va_status, "vaCreateSurfaces");
  74
  75         va_status = vaCreateContext(va_dpy->va_dpy, config_id, width, height, 0, &ret.surface, 1, &ret.context);
  76         CHECK_VASTATUS(va_status, "vaCreateContext");
  77
  78         va_status = vaCreateImage(va_dpy->va_dpy, &uyvy_format, width, height, &ret.image);
  79         CHECK_VASTATUS(va_status, "vaCreateImage");
  80
  81         return ret;
  82 }
  83
  84 void release_va_resources(VAResources resources)
  85 {
  86         lock_guard<mutex> lock(va_resources_mutex);
  87         if (va_resources_freelist.size() > 10) {
  88                 auto it = va_resources_freelist.end();
  89                 --it;
  90
  91                 VAStatus va_status = vaDestroyImage(va_dpy->va_dpy, it->image.image_id);
  92                 CHECK_VASTATUS(va_status, "vaDestroyImage");
  93
  94                 va_status = vaDestroyContext(va_dpy->va_dpy, it->context);
  95                 CHECK_VASTATUS(va_status, "vaDestroyContext");
  96
  97                 va_status = vaDestroySurfaces(va_dpy->va_dpy, &it->surface, 1);
  98                 CHECK_VASTATUS(va_status, "vaDestroySurfaces");
  99
 100                 va_resources_freelist.erase(it);
 101         }
 102
 103         va_resources_freelist.push_front(resources);
 104 }
 105
 106 // RAII wrapper to release VAResources on return (even on error).
 107 class ReleaseVAResources {
 108 public:
 109         ReleaseVAResources(const VAResources &resources)
 110                 : resources(resources) {}
 111         ~ReleaseVAResources() {
 112                 if (!committed) {
 113                         release_va_resources(resources);
 114                 }
 115         }
 116
 117         void commit() { committed = true; }
 118
 119 private:
 120         const VAResources &resources;
 121         bool committed = false;
 122 };
 123
 124 VADisplayWithCleanup::~VADisplayWithCleanup()
 125 {
 126         if (va_dpy != nullptr) {
 127                 vaTerminate(va_dpy);
 128         }
 129         if (x11_display != nullptr) {
 130                 XCloseDisplay(x11_display);
 131         }
 132         if (drm_fd != -1) {
 133                 close(drm_fd);
 134         }
 135 }
 136
 137 unique_ptr<VADisplayWithCleanup> va_open_display(const string &va_display)
 138 {
 139         if (va_display.empty() || va_display[0] != '/') {  // An X display.
 140                 Display *x11_display = XOpenDisplay(va_display.empty() ? nullptr : va_display.c_str());
 141                 if (x11_display == nullptr) {
 142                         fprintf(stderr, "error: can't connect to X server!\n");
 143                         return nullptr;
 144                 }
 145
 146                 unique_ptr<VADisplayWithCleanup> ret(new VADisplayWithCleanup);
 147                 ret->x11_display = x11_display;
 148                 ret->va_dpy = vaGetDisplay(x11_display);
 149                 if (ret->va_dpy == nullptr) {
 150                         return nullptr;
 151                 }
 152                 return ret;
 153         } else {  // A DRM node on the filesystem (e.g. /dev/dri/renderD128).
 154                 int drm_fd = open(va_display.c_str(), O_RDWR);
 155                 if (drm_fd == -1) {
 156                         perror(va_display.c_str());
 157                         return nullptr;
 158                 }
 159                 unique_ptr<VADisplayWithCleanup> ret(new VADisplayWithCleanup);
 160                 ret->drm_fd = drm_fd;
 161                 ret->va_dpy = vaGetDisplayDRM(drm_fd);
 162                 if (ret->va_dpy == nullptr) {
 163                         return nullptr;
 164                 }
 165                 return ret;
 166         }
 167 }
 168
 169 unique_ptr<VADisplayWithCleanup> try_open_va(const string &va_display, string *error)
 170 {
 171         unique_ptr<VADisplayWithCleanup> va_dpy = va_open_display(va_display);
 172         if (va_dpy == nullptr) {
 173                 if (error) *error = "Opening VA display failed";
 174                 return nullptr;
 175         }
 176         int major_ver, minor_ver;
 177         VAStatus va_status = vaInitialize(va_dpy->va_dpy, &major_ver, &minor_ver);
 178         if (va_status != VA_STATUS_SUCCESS) {
 179                 char buf[256];
 180                 snprintf(buf, sizeof(buf), "vaInitialize() failed with status %d\n", va_status);
 181                 if (error != nullptr) *error = buf;
 182                 return nullptr;
 183         }
 184
 185         int num_entrypoints = vaMaxNumEntrypoints(va_dpy->va_dpy);
 186         unique_ptr<VAEntrypoint[]> entrypoints(new VAEntrypoint[num_entrypoints]);
 187         if (entrypoints == nullptr) {
 188                 if (error != nullptr) *error = "Failed to allocate memory for VA entry points";
 189                 return nullptr;
 190         }
 191
 192         vaQueryConfigEntrypoints(va_dpy->va_dpy, VAProfileJPEGBaseline, entrypoints.get(), &num_entrypoints);
 193         for (int slice_entrypoint = 0; slice_entrypoint < num_entrypoints; slice_entrypoint++) {
 194                 if (entrypoints[slice_entrypoint] != VAEntrypointVLD) {
 195                         continue;
 196                 }
 197
 198                 // We found a usable decode, so return it.
 199                 return va_dpy;
 200         }
 201
 202         if (error != nullptr) *error = "Can't find VAEntrypointVLD for the JPEG profile";
 203         return nullptr;
 204 }
 205
 206 string get_usable_va_display()
 207 {
 208         // Reduce the amount of chatter while probing,
 209         // unless the user has specified otherwise.
 210         bool need_env_reset = false;
 211         if (getenv("LIBVA_MESSAGING_LEVEL") == nullptr) {
 212                 setenv("LIBVA_MESSAGING_LEVEL", "0", true);
 213                 need_env_reset = true;
 214         }
 215
 216         // First try the default (ie., whatever $DISPLAY is set to).
 217         unique_ptr<VADisplayWithCleanup> va_dpy = try_open_va("", nullptr);
 218         if (va_dpy != nullptr) {
 219                 if (need_env_reset) {
 220                         unsetenv("LIBVA_MESSAGING_LEVEL");
 221                 }
 222                 return "";
 223         }
 224
 225         fprintf(stderr, "The X11 display did not expose a VA-API JPEG decoder.\n");
 226
 227         // Try all /dev/dri/render* in turn. TODO: Accept /dev/dri/card*, too?
 228         glob_t g;
 229         int err = glob("/dev/dri/renderD*", 0, nullptr, &g);
 230         if (err != 0) {
 231                 fprintf(stderr, "Couldn't list render nodes (%s) when trying to autodetect a replacement.\n", strerror(errno));
 232         } else {
 233                 for (size_t i = 0; i < g.gl_pathc; ++i) {
 234                         string path = g.gl_pathv[i];
 235                         va_dpy = try_open_va(path, nullptr);
 236                         if (va_dpy != nullptr) {
 237                                 fprintf(stderr, "Autodetected %s as a suitable replacement; using it.\n",
 238                                         path.c_str());
 239                                 globfree(&g);
 240                                 if (need_env_reset) {
 241                                         unsetenv("LIBVA_MESSAGING_LEVEL");
 242                                 }
 243                                 return path;
 244                         }
 245                 }
 246         }
 247
 248         fprintf(stderr, "No suitable VA-API JPEG decoders were found in /dev/dri; giving up.\n");
 249         fprintf(stderr, "Note that if you are using an Intel CPU with an external GPU,\n");
 250         fprintf(stderr, "you may need to enable the integrated Intel GPU in your BIOS\n");
 251         fprintf(stderr, "to expose Quick Sync.\n");
 252         return "none";
 253 }
 254
 255 void init_jpeg_vaapi()
 256 {
 257         string dpy = get_usable_va_display();
 258         if (dpy == "none") {
 259                 return;
 260         }
 261
 262         va_dpy = try_open_va(dpy, nullptr);
 263         if (va_dpy == nullptr) {
 264                 return;
 265         }
 266
 267         VAConfigAttrib attr = { VAConfigAttribRTFormat, VA_RT_FORMAT_YUV422 };
 268
 269         VAStatus va_status = vaCreateConfig(va_dpy->va_dpy, VAProfileJPEGBaseline, VAEntrypointVLD,
 270                 &attr, 1, &config_id);
 271         CHECK_VASTATUS(va_status, "vaCreateConfig");
 272
 273         int num_formats = vaMaxNumImageFormats(va_dpy->va_dpy);
 274         assert(num_formats > 0);
 275
 276         unique_ptr<VAImageFormat[]> formats(new VAImageFormat[num_formats]);
 277         va_status = vaQueryImageFormats(va_dpy->va_dpy, formats.get(), &num_formats);
 278         CHECK_VASTATUS(va_status, "vaQueryImageFormats");
 279
 280         bool found = false;
 281         for (int i = 0; i < num_formats; ++i) {
 282                 // Seemingly VA_FOURCC_422H is no good for vaGetImage(). :-/
 283                 if (formats[i].fourcc == VA_FOURCC_UYVY) {
 284                         memcpy(&uyvy_format, &formats[i], sizeof(VAImageFormat));
 285                         found = true;
 286                         break;
 287                 }
 288         }
 289         if (!found) {
 290                 return;
 291         }
 292
 293         fprintf(stderr, "VA-API JPEG decoding initialized.\n");
 294         vaapi_jpeg_decoding_usable = true;
 295 }
 296
 297 shared_ptr<Frame> decode_jpeg_vaapi(const string &filename)
 298 {
 299         jpeg_decompress_struct dinfo;
 300         jpeg_error_mgr jerr;
 301         dinfo.err = jpeg_std_error(&jerr);
 302         jpeg_create_decompress(&dinfo);
 303
 304         FILE *fp = fopen(filename.c_str(), "rb");
 305         if (fp == nullptr) {
 306                 perror(filename.c_str());
 307                 exit(1);
 308         }
 309         jpeg_stdio_src(&dinfo, fp);
 310
 311         jpeg_read_header(&dinfo, true);
 312
 313         // Read the data that comes after the header. VA-API will destuff and all for us.
 314         std::string str((const char *)dinfo.src->next_input_byte, dinfo.src->bytes_in_buffer);
 315         while (!feof(fp)) {
 316                 char buf[4096];
 317                 size_t ret = fread(buf, 1, sizeof(buf), fp);
 318                 str.append(buf, ret);
 319         }
 320         fclose(fp);
 321
 322         if (dinfo.num_components != 3) {
 323                 fprintf(stderr, "Not a color JPEG. (%d components, Y=%dx%d, Cb=%dx%d, Cr=%dx%d)\n",
 324                         dinfo.num_components,
 325                         dinfo.comp_info[0].h_samp_factor, dinfo.comp_info[0].v_samp_factor,
 326                         dinfo.comp_info[1].h_samp_factor, dinfo.comp_info[1].v_samp_factor,
 327                         dinfo.comp_info[2].h_samp_factor, dinfo.comp_info[2].v_samp_factor);
 328                 return nullptr;
 329         }
 330         if (dinfo.comp_info[0].h_samp_factor != 2 ||
 331             dinfo.comp_info[0].v_samp_factor != 2 ||
 332             dinfo.comp_info[1].h_samp_factor != 1 ||
 333             dinfo.comp_info[1].v_samp_factor != 2 ||
 334             dinfo.comp_info[2].h_samp_factor != 1 ||
 335             dinfo.comp_info[2].v_samp_factor != 2) {
 336                 fprintf(stderr, "Not 4:2:2. (Y=%dx%d, Cb=%dx%d, Cr=%dx%d)\n",
 337                         dinfo.comp_info[0].h_samp_factor, dinfo.comp_info[0].v_samp_factor,
 338                         dinfo.comp_info[1].h_samp_factor, dinfo.comp_info[1].v_samp_factor,
 339                         dinfo.comp_info[2].h_samp_factor, dinfo.comp_info[2].v_samp_factor);
 340                 return nullptr;
 341         }
 342
 343         // Picture parameters.
 344         VAPictureParameterBufferJPEGBaseline pic_param;
 345         memset(&pic_param, 0, sizeof(pic_param));
 346         pic_param.picture_width = dinfo.image_width;
 347         pic_param.picture_height = dinfo.image_height;
 348         for (int component_idx = 0; component_idx < dinfo.num_components; ++component_idx) {
 349                 const jpeg_component_info *comp = &dinfo.comp_info[component_idx];
 350                 pic_param.components[component_idx].component_id = comp->component_id;
 351                 pic_param.components[component_idx].h_sampling_factor = comp->h_samp_factor;
 352                 pic_param.components[component_idx].v_sampling_factor = comp->v_samp_factor;
 353                 pic_param.components[component_idx].quantiser_table_selector = comp->quant_tbl_no;
 354         }
 355         pic_param.num_components = dinfo.num_components;
 356         pic_param.color_space = 0;  // YUV.
 357         pic_param.rotation = VA_ROTATION_NONE;
 358
 359         VABufferID pic_param_buffer;
 360         VAStatus va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAPictureParameterBufferType, sizeof(pic_param), 1, &pic_param, &pic_param_buffer);
 361         CHECK_VASTATUS_RET(va_status, "vaCreateBuffer");
 362
 363         // Quantization matrices.
 364         VAIQMatrixBufferJPEGBaseline iq;
 365         memset(&iq, 0, sizeof(iq));
 366
 367         for (int quant_tbl_idx = 0; quant_tbl_idx < min(4, NUM_QUANT_TBLS); ++quant_tbl_idx) {
 368                 const JQUANT_TBL *qtbl = dinfo.quant_tbl_ptrs[quant_tbl_idx];
 369                 if (qtbl == nullptr) {
 370                         iq.load_quantiser_table[quant_tbl_idx] = 0;
 371                 } else {
 372                         iq.load_quantiser_table[quant_tbl_idx] = 1;
 373                         for (int i = 0; i < 64; ++i) {
 374                                 if (qtbl->quantval[i] > 255) {
 375                                         fprintf(stderr, "Baseline JPEG only!\n");
 376                                         return nullptr;
 377                                 }
 378                                 iq.quantiser_table[quant_tbl_idx][i] = qtbl->quantval[i];
 379                         }
 380                 }
 381         }
 382
 383         VABufferID iq_buffer;
 384         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAIQMatrixBufferType, sizeof(iq), 1, &iq, &iq_buffer);
 385         CHECK_VASTATUS_RET(va_status, "vaCreateBuffer");
 386
 387         // Huffman tables (arithmetic is not supported).
 388         VAHuffmanTableBufferJPEGBaseline huff;
 389         memset(&huff, 0, sizeof(huff));
 390
 391         for (int huff_tbl_idx = 0; huff_tbl_idx < min(2, NUM_HUFF_TBLS); ++huff_tbl_idx) {
 392                 const JHUFF_TBL *ac_hufftbl = dinfo.ac_huff_tbl_ptrs[huff_tbl_idx];
 393                 const JHUFF_TBL *dc_hufftbl = dinfo.dc_huff_tbl_ptrs[huff_tbl_idx];
 394                 if (ac_hufftbl == nullptr) {
 395                         assert(dc_hufftbl == nullptr);
 396                         huff.load_huffman_table[huff_tbl_idx] = 0;
 397                 } else {
 398                         assert(dc_hufftbl != nullptr);
 399                         huff.load_huffman_table[huff_tbl_idx] = 1;
 400
 401                         for (int i = 0; i < 16; ++i) {
 402                                 huff.huffman_table[huff_tbl_idx].num_dc_codes[i] = dc_hufftbl->bits[i + 1];
 403                         }
 404                         for (int i = 0; i < 12; ++i) {
 405                                 huff.huffman_table[huff_tbl_idx].dc_values[i] = dc_hufftbl->huffval[i];
 406                         }
 407                         for (int i = 0; i < 16; ++i) {
 408                                 huff.huffman_table[huff_tbl_idx].num_ac_codes[i] = ac_hufftbl->bits[i + 1];
 409                         }
 410                         for (int i = 0; i < 162; ++i) {
 411                                 huff.huffman_table[huff_tbl_idx].ac_values[i] = ac_hufftbl->huffval[i];
 412                         }
 413                 }
 414         }
 415
 416         VABufferID huff_buffer;
 417         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAHuffmanTableBufferType, sizeof(huff), 1, &huff, &huff_buffer);
 418         CHECK_VASTATUS_RET(va_status, "vaCreateBuffer");
 419
 420         // Slice parameters (metadata about the slice).
 421         VASliceParameterBufferJPEGBaseline parms;
 422         memset(&parms, 0, sizeof(parms));
 423         parms.slice_data_size = str.size();
 424         parms.slice_data_offset = 0;
 425         parms.slice_data_flag = VA_SLICE_DATA_FLAG_ALL;
 426         parms.slice_horizontal_position = 0;
 427         parms.slice_vertical_position = 0;
 428         for (int component_idx = 0; component_idx < dinfo.num_components; ++component_idx) {
 429                 const jpeg_component_info *comp = &dinfo.comp_info[component_idx];
 430                 parms.components[component_idx].component_selector = comp->component_id;
 431                 parms.components[component_idx].dc_table_selector = comp->dc_tbl_no;
 432                 parms.components[component_idx].ac_table_selector = comp->ac_tbl_no;
 433                 if (parms.components[component_idx].dc_table_selector > 1 ||
 434                     parms.components[component_idx].ac_table_selector > 1) {
 435                         fprintf(stderr, "Uses too many Huffman tables\n");
 436                         return nullptr;
 437                 }
 438         }
 439         parms.num_components = dinfo.num_components;
 440         parms.restart_interval = dinfo.restart_interval;
 441         int horiz_mcus = (dinfo.image_width + (DCTSIZE * 2) - 1) / (DCTSIZE * 2);
 442         int vert_mcus = (dinfo.image_height + DCTSIZE - 1) / DCTSIZE;
 443         parms.num_mcus = horiz_mcus * vert_mcus;
 444
 445         VABufferID slice_param_buffer;
 446         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VASliceParameterBufferType, sizeof(parms), 1, &parms, &slice_param_buffer);
 447         CHECK_VASTATUS_RET(va_status, "vaCreateBuffer");
 448
 449         // The actual data.
 450         VABufferID data_buffer;
 451         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VASliceDataBufferType, str.size(), 1, &str[0], &data_buffer);
 452         CHECK_VASTATUS_RET(va_status, "vaCreateBuffer");
 453
 454         VAResources resources = get_va_resources(dinfo.image_width, dinfo.image_height);
 455         ReleaseVAResources release(resources);
 456
 457         va_status = vaBeginPicture(va_dpy->va_dpy, resources.context, resources.surface);
 458         CHECK_VASTATUS_RET(va_status, "vaBeginPicture");
 459         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &pic_param_buffer, 1);
 460         CHECK_VASTATUS_RET(va_status, "vaRenderPicture(pic_param)");
 461         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &iq_buffer, 1);
 462         CHECK_VASTATUS_RET(va_status, "vaRenderPicture(iq)");
 463         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &huff_buffer, 1);
 464         CHECK_VASTATUS_RET(va_status, "vaRenderPicture(huff)");
 465         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &slice_param_buffer, 1);
 466         CHECK_VASTATUS_RET(va_status, "vaRenderPicture(slice_param)");
 467         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &data_buffer, 1);
 468         CHECK_VASTATUS_RET(va_status, "vaRenderPicture(data)");
 469         va_status = vaEndPicture(va_dpy->va_dpy, resources.context);
 470         CHECK_VASTATUS_RET(va_status, "vaEndPicture");
 471
 472         // vaDeriveImage() works, but the resulting image seems to live in
 473         // uncached memory, which makes copying data out from it very, very slow.
 474         // Thanks to FFmpeg for the observation that you can vaGetImage() the
 475         // surface onto your own image (although then, it can't be planar, which
 476         // is unfortunate for us).
 477 #if 0
 478         VAImage image;
 479         va_status = vaDeriveImage(va_dpy->va_dpy, surf, &image);
 480         CHECK_VASTATUS_RET(va_status, "vaDeriveImage");
 481 #else
 482         va_status = vaSyncSurface(va_dpy->va_dpy, resources.surface);
 483         CHECK_VASTATUS_RET(va_status, "vaSyncSurface");
 484
 485         va_status = vaGetImage(va_dpy->va_dpy, resources.surface, 0, 0, dinfo.image_width, dinfo.image_height, resources.image.image_id);
 486         CHECK_VASTATUS_RET(va_status, "vaGetImage");
 487 #endif
 488
 489         void *mapped;
 490         va_status = vaMapBuffer(va_dpy->va_dpy, resources.image.buf, &mapped);
 491         CHECK_VASTATUS_RET(va_status, "vaMapBuffer");
 492
 493         shared_ptr<Frame> frame(new Frame);
 494 #if 0
 495         // 4:2:2 planar (for vaDeriveImage).
 496         frame->y.reset(new uint8_t[dinfo.image_width * dinfo.image_height]);
 497         frame->cb.reset(new uint8_t[(dinfo.image_width / 2) * dinfo.image_height]);
 498         frame->cr.reset(new uint8_t[(dinfo.image_width / 2) * dinfo.image_height]);
 499         for (int component_idx = 0; component_idx < dinfo.num_components; ++component_idx) {
 500                 uint8_t *dptr;
 501                 size_t width;
 502                 if (component_idx == 0) {
 503                         dptr = frame->y.get();
 504                         width = dinfo.image_width;
 505                 } else if (component_idx == 1) {
 506                         dptr = frame->cb.get();
 507                         width = dinfo.image_width / 2;
 508                 } else if (component_idx == 2) {
 509                         dptr = frame->cr.get();
 510                         width = dinfo.image_width / 2;
 511                 } else {
 512                         assert(false);
 513                 }
 514                 const uint8_t *sptr = (const uint8_t *)mapped + image.offsets[component_idx];
 515                 size_t spitch = image.pitches[component_idx];
 516                 for (size_t y = 0; y < dinfo.image_height; ++y) {
 517                         memcpy(dptr + y * width, sptr + y * spitch, width);
 518                 }
 519         }
 520 #else
 521         // Convert Y'CbCr to separate Y' and CbCr.
 522         frame->is_semiplanar = true;
 523         frame->y.reset(new uint8_t[dinfo.image_width * dinfo.image_height]);
 524         frame->cbcr.reset(new uint8_t[dinfo.image_width * dinfo.image_height]);
 525         const uint8_t *src = (const uint8_t *)mapped + resources.image.offsets[0];
 526         if (resources.image.pitches[0] == dinfo.image_width * 2) {
 527                 memcpy_interleaved(frame->cbcr.get(), frame->y.get(), src, dinfo.image_width * dinfo.image_height * 2);
 528         } else {
 529                 for (unsigned y = 0; y < dinfo.image_height; ++y) {
 530                         memcpy_interleaved(frame->cbcr.get() + y * dinfo.image_width, frame->y.get() + y * dinfo.image_width,
 531                                            src + y * resources.image.pitches[0], dinfo.image_width * 2);
 532                 }
 533         }
 534 #endif
 535         frame->width = dinfo.image_width;
 536         frame->height = dinfo.image_height;
 537         frame->chroma_subsampling_x = 2;
 538         frame->chroma_subsampling_y = 1;
 539         frame->pitch_y = dinfo.image_width;
 540         frame->pitch_chroma = dinfo.image_width / 2;
 541
 542         va_status = vaUnmapBuffer(va_dpy->va_dpy, resources.image.buf);
 543         CHECK_VASTATUS_RET(va_status, "vaUnmapBuffer");
 544
 545         return frame;
 546 }