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

   1 #include "mjpeg_encoder.h"
   2
   3 #include <jpeglib.h>
   4 #include <unistd.h>
   5 #if __SSE2__
   6 #include <immintrin.h>
   7 #endif
   8 #include <list>
   9
  10 extern "C" {
  11 #include <libavformat/avformat.h>
  12 }
  13
  14 #include "defs.h"
  15 #include "shared/ffmpeg_raii.h"
  16 #include "flags.h"
  17 #include "shared/httpd.h"
  18 #include "shared/memcpy_interleaved.h"
  19 #include "pbo_frame_allocator.h"
  20 #include "shared/timebase.h"
  21 #include "va_display_with_cleanup.h"
  22
  23 #include <va/va.h>
  24 #include <va/va_drm.h>
  25 #include <va/va_x11.h>
  26
  27 using namespace bmusb;
  28 using namespace std;
  29
  30 extern void memcpy_with_pitch(uint8_t *dst, const uint8_t *src, size_t src_width, size_t dst_pitch, size_t height);
  31
  32 #define CHECK_VASTATUS(va_status, func)                                 \
  33     if (va_status != VA_STATUS_SUCCESS) {                               \
  34         fprintf(stderr, "%s:%d (%s) failed with %d\n", __func__, __LINE__, func, va_status); \
  35         exit(1);                                                        \
  36     }
  37
  38 // From libjpeg (although it's of course identical between implementations).
  39 static const int jpeg_natural_order[DCTSIZE2] = {
  40          0,  1,  8, 16,  9,  2,  3, 10,
  41         17, 24, 32, 25, 18, 11,  4,  5,
  42         12, 19, 26, 33, 40, 48, 41, 34,
  43         27, 20, 13,  6,  7, 14, 21, 28,
  44         35, 42, 49, 56, 57, 50, 43, 36,
  45         29, 22, 15, 23, 30, 37, 44, 51,
  46         58, 59, 52, 45, 38, 31, 39, 46,
  47         53, 60, 61, 54, 47, 55, 62, 63,
  48 };
  49
  50 struct VectorDestinationManager {
  51         jpeg_destination_mgr pub;
  52         std::vector<uint8_t> dest;
  53
  54         VectorDestinationManager()
  55         {
  56                 pub.init_destination = init_destination_thunk;
  57                 pub.empty_output_buffer = empty_output_buffer_thunk;
  58                 pub.term_destination = term_destination_thunk;
  59         }
  60
  61         static void init_destination_thunk(j_compress_ptr ptr)
  62         {
  63                 ((VectorDestinationManager *)(ptr->dest))->init_destination();
  64         }
  65
  66         inline void init_destination()
  67         {
  68                 make_room(0);
  69         }
  70
  71         static boolean empty_output_buffer_thunk(j_compress_ptr ptr)
  72         {
  73                 return ((VectorDestinationManager *)(ptr->dest))->empty_output_buffer();
  74         }
  75
  76         inline bool empty_output_buffer()
  77         {
  78                 make_room(dest.size());  // Should ignore pub.free_in_buffer!
  79                 return true;
  80         }
  81
  82         inline void make_room(size_t bytes_used)
  83         {
  84                 dest.resize(bytes_used + 4096);
  85                 dest.resize(dest.capacity());
  86                 pub.next_output_byte = dest.data() + bytes_used;
  87                 pub.free_in_buffer = dest.size() - bytes_used;
  88         }
  89
  90         static void term_destination_thunk(j_compress_ptr ptr)
  91         {
  92                 ((VectorDestinationManager *)(ptr->dest))->term_destination();
  93         }
  94
  95         inline void term_destination()
  96         {
  97                 dest.resize(dest.size() - pub.free_in_buffer);
  98         }
  99 };
 100 static_assert(std::is_standard_layout<VectorDestinationManager>::value, "");
 101
 102 int MJPEGEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
 103 {
 104         MJPEGEncoder *engine = (MJPEGEncoder *)opaque;
 105         return engine->write_packet2(buf, buf_size, type, time);
 106 }
 107
 108 int MJPEGEncoder::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
 109 {
 110         if (type == AVIO_DATA_MARKER_HEADER) {
 111                 mux_header.append((char *)buf, buf_size);
 112                 httpd->set_header(HTTPD::MULTICAM_STREAM, mux_header);
 113         } else {
 114                 httpd->add_data(HTTPD::MULTICAM_STREAM, (char *)buf, buf_size, /*keyframe=*/true, AV_NOPTS_VALUE, AVRational{ AV_TIME_BASE, 1 });
 115         }
 116         return buf_size;
 117 }
 118
 119 MJPEGEncoder::MJPEGEncoder(HTTPD *httpd, const string &va_display)
 120         : httpd(httpd)
 121 {
 122         encoder_thread = thread(&MJPEGEncoder::encoder_thread_func, this);
 123
 124         // Set up the mux. We don't use the Mux wrapper, because it's geared towards
 125         // a situation with only one video stream (and possibly one audio stream)
 126         // with known width/height, and we don't need the extra functionality it provides.
 127         avctx.reset(avformat_alloc_context());
 128         avctx->oformat = av_guess_format("mp4", nullptr, nullptr);
 129
 130         uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
 131         avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
 132         avctx->pb->write_data_type = &MJPEGEncoder::write_packet2_thunk;
 133         avctx->flags = AVFMT_FLAG_CUSTOM_IO;
 134
 135         for (int card_idx = 0; card_idx < global_flags.num_cards; ++card_idx) {
 136                 AVStream *stream = avformat_new_stream(avctx.get(), nullptr);
 137                 if (stream == nullptr) {
 138                         fprintf(stderr, "avformat_new_stream() failed\n");
 139                         exit(1);
 140                 }
 141                 stream->time_base = AVRational{ 1, TIMEBASE };
 142                 stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
 143                 stream->codecpar->codec_id = AV_CODEC_ID_MJPEG;
 144
 145                 // Used for aspect ratio only. Can change without notice (the mux won't care).
 146                 stream->codecpar->width = global_flags.width;
 147                 stream->codecpar->height = global_flags.height;
 148
 149                 // TODO: We could perhaps use the interpretation for each card here
 150                 // (or at least the command-line flags) instead of the defaults,
 151                 // but what would we do when they change?
 152                 stream->codecpar->color_primaries = AVCOL_PRI_BT709;
 153                 stream->codecpar->color_trc = AVCOL_TRC_IEC61966_2_1;
 154                 stream->codecpar->color_space = AVCOL_SPC_BT709;
 155                 stream->codecpar->color_range = AVCOL_RANGE_MPEG;
 156                 stream->codecpar->chroma_location = AVCHROMA_LOC_LEFT;
 157                 stream->codecpar->field_order = AV_FIELD_PROGRESSIVE;
 158         }
 159
 160         AVDictionary *options = NULL;
 161         vector<pair<string, string>> opts = MUX_OPTS;
 162         for (pair<string, string> opt : opts) {
 163                 av_dict_set(&options, opt.first.c_str(), opt.second.c_str(), 0);
 164         }
 165         if (avformat_write_header(avctx.get(), &options) < 0) {
 166                 fprintf(stderr, "avformat_write_header() failed\n");
 167                 exit(1);
 168         }
 169
 170         // Initialize VA-API.
 171         string error;
 172         va_dpy = try_open_va(va_display, &error, &config_id);
 173         if (va_dpy == nullptr) {
 174                 fprintf(stderr, "Could not initialize VA-API for MJPEG encoding: %s. JPEGs will be encoded in software if needed.\n", error.c_str());
 175         }
 176
 177         running = true;
 178 }
 179
 180 MJPEGEncoder::~MJPEGEncoder()
 181 {
 182         av_free(avctx->pb->buffer);
 183 }
 184
 185 void MJPEGEncoder::stop()
 186 {
 187         if (!running) {
 188                 return;
 189         }
 190         running = false;
 191         should_quit = true;
 192         any_frames_to_be_encoded.notify_all();
 193         encoder_thread.join();
 194 }
 195
 196 unique_ptr<VADisplayWithCleanup> MJPEGEncoder::try_open_va(const string &va_display, string *error, VAConfigID *config_id)
 197 {
 198         unique_ptr<VADisplayWithCleanup> va_dpy = va_open_display(va_display);
 199         if (va_dpy == nullptr) {
 200                 if (error) *error = "Opening VA display failed";
 201                 return nullptr;
 202         }
 203         int major_ver, minor_ver;
 204         VAStatus va_status = vaInitialize(va_dpy->va_dpy, &major_ver, &minor_ver);
 205         if (va_status != VA_STATUS_SUCCESS) {
 206                 char buf[256];
 207                 snprintf(buf, sizeof(buf), "vaInitialize() failed with status %d\n", va_status);
 208                 if (error != nullptr) *error = buf;
 209                 return nullptr;
 210         }
 211
 212         VAConfigAttrib attr = { VAConfigAttribRTFormat, VA_RT_FORMAT_YUV422 };
 213         va_status = vaCreateConfig(va_dpy->va_dpy, VAProfileJPEGBaseline, VAEntrypointEncPicture,
 214                 &attr, 1, config_id);
 215         if (va_status == VA_STATUS_ERROR_UNSUPPORTED_ENTRYPOINT) {
 216                 if (error != nullptr) *error = "No hardware support";
 217                 return nullptr;
 218         } else if (va_status != VA_STATUS_SUCCESS) {
 219                 char buf[256];
 220                 snprintf(buf, sizeof(buf), "vaCreateConfig() failed with status %d\n", va_status);
 221                 if (error != nullptr) *error = buf;
 222                 return nullptr;
 223         }
 224
 225         int num_formats = vaMaxNumImageFormats(va_dpy->va_dpy);
 226         assert(num_formats > 0);
 227
 228         unique_ptr<VAImageFormat[]> formats(new VAImageFormat[num_formats]);
 229         va_status = vaQueryImageFormats(va_dpy->va_dpy, formats.get(), &num_formats);
 230         if (va_status != VA_STATUS_SUCCESS) {
 231                 char buf[256];
 232                 snprintf(buf, sizeof(buf), "vaQueryImageFormats() failed with status %d\n", va_status);
 233                 if (error != nullptr) *error = buf;
 234                 return nullptr;
 235         }
 236
 237         return va_dpy;
 238 }
 239
 240 void MJPEGEncoder::upload_frame(int64_t pts, unsigned card_index, RefCountedFrame frame, const bmusb::VideoFormat &video_format, size_t y_offset, size_t cbcr_offset)
 241 {
 242         PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)frame->userdata;
 243         if (video_format.width == 0 || video_format.height == 0) {
 244                 return;
 245         }
 246         if (video_format.interlaced) {
 247                 fprintf(stderr, "Card %u: Ignoring JPEG encoding for interlaced frame\n", card_index);
 248                 return;
 249         }
 250         if (userdata->pixel_format != PixelFormat_8BitYCbCr ||
 251             !frame->interleaved) {
 252                 fprintf(stderr, "Card %u: Ignoring JPEG encoding for unsupported pixel format\n", card_index);
 253                 return;
 254         }
 255         if (video_format.width > 4096 || video_format.height > 4096) {
 256                 fprintf(stderr, "Card %u: Ignoring JPEG encoding for oversized frame\n", card_index);
 257                 return;
 258         }
 259
 260         lock_guard<mutex> lock(mu);
 261         frames_to_be_encoded.push(QueuedFrame{ pts, card_index, frame, video_format, y_offset, cbcr_offset });
 262         any_frames_to_be_encoded.notify_all();
 263 }
 264
 265 void MJPEGEncoder::encoder_thread_func()
 266 {
 267         pthread_setname_np(pthread_self(), "MJPEG_Encode");
 268         posix_memalign((void **)&tmp_y, 4096, 4096 * 8);
 269         posix_memalign((void **)&tmp_cbcr, 4096, 4096 * 8);
 270         posix_memalign((void **)&tmp_cb, 4096, 4096 * 8);
 271         posix_memalign((void **)&tmp_cr, 4096, 4096 * 8);
 272
 273         unique_lock<mutex> lock(mu);
 274         for (;;) {
 275                 any_frames_to_be_encoded.wait(lock, [this] { return !frames_to_be_encoded.empty() || should_quit; });
 276                 if (should_quit) break;
 277                 QueuedFrame qf = move(frames_to_be_encoded.front());
 278                 frames_to_be_encoded.pop();
 279
 280                 vector<uint8_t> jpeg = encode_jpeg(qf);
 281
 282                 AVPacket pkt;
 283                 memset(&pkt, 0, sizeof(pkt));
 284                 pkt.buf = nullptr;
 285                 pkt.data = &jpeg[0];
 286                 pkt.size = jpeg.size();
 287                 pkt.stream_index = qf.card_index;
 288                 pkt.flags = AV_PKT_FLAG_KEY;
 289                 pkt.pts = pkt.dts = qf.pts;
 290
 291                 if (av_write_frame(avctx.get(), &pkt) < 0) {
 292                         fprintf(stderr, "av_write_frame() failed\n");
 293                         exit(1);
 294                 }
 295         }
 296
 297         free(tmp_y);
 298         free(tmp_cbcr);
 299         free(tmp_cb);
 300         free(tmp_cr);
 301 }
 302
 303 class VABufferDestroyer {
 304 public:
 305         VABufferDestroyer(VADisplay dpy, VABufferID buf)
 306                 : dpy(dpy), buf(buf) {}
 307
 308         ~VABufferDestroyer() {
 309                 VAStatus va_status = vaDestroyBuffer(dpy, buf);
 310                 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
 311         }
 312
 313 private:
 314         VADisplay dpy;
 315         VABufferID buf;
 316 };
 317
 318 MJPEGEncoder::VAResources MJPEGEncoder::get_va_resources(unsigned width, unsigned height)
 319 {
 320         {
 321                 lock_guard<mutex> lock(va_resources_mutex);
 322                 for (auto it = va_resources_freelist.begin(); it != va_resources_freelist.end(); ++it) {
 323                         if (it->width == width && it->height == height) {
 324                                 VAResources ret = *it;
 325                                 va_resources_freelist.erase(it);
 326                                 return ret;
 327                         }
 328                 }
 329         }
 330
 331         VAResources ret;
 332
 333         ret.width = width;
 334         ret.height = height;
 335
 336         VASurfaceAttrib attrib;
 337         attrib.flags = VA_SURFACE_ATTRIB_SETTABLE;
 338         attrib.type = VASurfaceAttribPixelFormat;
 339         attrib.value.type = VAGenericValueTypeInteger;
 340         attrib.value.value.i = VA_FOURCC_UYVY;
 341
 342         VAStatus va_status = vaCreateSurfaces(va_dpy->va_dpy, VA_RT_FORMAT_YUV422,
 343                 width, height,
 344                 &ret.surface, 1, &attrib, 1);
 345         CHECK_VASTATUS(va_status, "vaCreateSurfaces");
 346
 347         va_status = vaCreateContext(va_dpy->va_dpy, config_id, width, height, 0, &ret.surface, 1, &ret.context);
 348         CHECK_VASTATUS(va_status, "vaCreateContext");
 349
 350         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncCodedBufferType, width * height * 3 + 8192, 1, nullptr, &ret.data_buffer);
 351         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 352
 353         return ret;
 354 }
 355
 356 void MJPEGEncoder::release_va_resources(MJPEGEncoder::VAResources resources)
 357 {
 358         lock_guard<mutex> lock(va_resources_mutex);
 359         if (va_resources_freelist.size() > 10) {
 360                 auto it = va_resources_freelist.end();
 361                 --it;
 362
 363                 VAStatus va_status = vaDestroyBuffer(va_dpy->va_dpy, it->data_buffer);
 364                 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
 365
 366                 va_status = vaDestroyContext(va_dpy->va_dpy, it->context);
 367                 CHECK_VASTATUS(va_status, "vaDestroyContext");
 368
 369                 va_status = vaDestroySurfaces(va_dpy->va_dpy, &it->surface, 1);
 370                 CHECK_VASTATUS(va_status, "vaDestroySurfaces");
 371
 372                 va_resources_freelist.erase(it);
 373         }
 374
 375         va_resources_freelist.push_front(resources);
 376 }
 377
 378 void MJPEGEncoder::init_jpeg_422(unsigned width, unsigned height, VectorDestinationManager *dest, jpeg_compress_struct *cinfo)
 379 {
 380         jpeg_error_mgr jerr;
 381         cinfo->err = jpeg_std_error(&jerr);
 382         jpeg_create_compress(cinfo);
 383
 384         cinfo->dest = (jpeg_destination_mgr *)dest;
 385
 386         cinfo->input_components = 3;
 387         jpeg_set_defaults(cinfo);
 388         jpeg_set_quality(cinfo, quality, /*force_baseline=*/false);
 389
 390         cinfo->image_width = width;
 391         cinfo->image_height = height;
 392         cinfo->raw_data_in = true;
 393         jpeg_set_colorspace(cinfo, JCS_YCbCr);
 394         cinfo->comp_info[0].h_samp_factor = 2;
 395         cinfo->comp_info[0].v_samp_factor = 1;
 396         cinfo->comp_info[1].h_samp_factor = 1;
 397         cinfo->comp_info[1].v_samp_factor = 1;
 398         cinfo->comp_info[2].h_samp_factor = 1;
 399         cinfo->comp_info[2].v_samp_factor = 1;
 400         cinfo->CCIR601_sampling = true;  // Seems to be mostly ignored by libjpeg, though.
 401         jpeg_start_compress(cinfo, true);
 402
 403         // This comment marker is private to FFmpeg. It signals limited Y'CbCr range
 404         // (and nothing else).
 405         jpeg_write_marker(cinfo, JPEG_COM, (const JOCTET *)"CS=ITU601", strlen("CS=ITU601"));
 406 }
 407
 408 vector<uint8_t> MJPEGEncoder::get_jpeg_header(unsigned width, unsigned height, jpeg_compress_struct *cinfo)
 409 {
 410         VectorDestinationManager dest;
 411         init_jpeg_422(width, height, &dest, cinfo);
 412
 413         // Make a dummy black image; there's seemingly no other easy way of
 414         // making libjpeg outputting all of its headers.
 415         JSAMPROW yptr[8], cbptr[8], crptr[8];
 416         JSAMPARRAY data[3] = { yptr, cbptr, crptr };
 417         memset(tmp_y, 0, 4096);
 418         memset(tmp_cb, 0, 4096);
 419         memset(tmp_cr, 0, 4096);
 420         for (unsigned yy = 0; yy < 8; ++yy) {
 421                 yptr[yy] = tmp_y;
 422                 cbptr[yy] = tmp_cb;
 423                 crptr[yy] = tmp_cr;
 424         }
 425         for (unsigned y = 0; y < height; y += 8) {
 426                 jpeg_write_raw_data(cinfo, data, /*num_lines=*/8);
 427         }
 428         jpeg_finish_compress(cinfo);
 429
 430         // We're only interested in the header, not the data after it.
 431         dest.term_destination();
 432         for (size_t i = 0; i < dest.dest.size() - 1; ++i) {
 433                 if (dest.dest[i] == 0xff && dest.dest[i + 1] == 0xda) {  // Start of scan (SOS).
 434                         unsigned len = dest.dest[i + 2] * 256 + dest.dest[i + 3];
 435                         dest.dest.resize(i + len + 2);
 436                         break;
 437                 }
 438         }
 439
 440         return dest.dest;
 441 }
 442
 443 MJPEGEncoder::VAData MJPEGEncoder::get_va_data_for_resolution(unsigned width, unsigned height)
 444 {
 445         pair<unsigned, unsigned> key(width, height);
 446         if (va_data_for_resolution.count(key)) {
 447                 return va_data_for_resolution[key];
 448         }
 449
 450         // Use libjpeg to generate a header and set sane defaults for e.g.
 451         // quantization tables. Then do the actual encode with VA-API.
 452         jpeg_compress_struct cinfo;
 453         vector<uint8_t> jpeg_header = get_jpeg_header(width, height, &cinfo);
 454
 455         // Picture parameters.
 456         VAEncPictureParameterBufferJPEG pic_param;
 457         memset(&pic_param, 0, sizeof(pic_param));
 458         pic_param.reconstructed_picture = VA_INVALID_ID;
 459         pic_param.picture_width = cinfo.image_width;
 460         pic_param.picture_height = cinfo.image_height;
 461         for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
 462                 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
 463                 pic_param.component_id[component_idx] = comp->component_id;
 464                 pic_param.quantiser_table_selector[component_idx] = comp->quant_tbl_no;
 465         }
 466         pic_param.num_components = cinfo.num_components;
 467         pic_param.num_scan = 1;
 468         pic_param.sample_bit_depth = 8;
 469         pic_param.coded_buf = VA_INVALID_ID;  // To be filled out by caller.
 470         pic_param.pic_flags.bits.huffman = 1;
 471         pic_param.quality = 50;  // Don't scale the given quantization matrices. (See gen8_mfc_jpeg_fqm_state)
 472
 473         // Quantization matrices.
 474         VAQMatrixBufferJPEG q;
 475         memset(&q, 0, sizeof(q));
 476
 477         q.load_lum_quantiser_matrix = true;
 478         q.load_chroma_quantiser_matrix = true;
 479         for (int quant_tbl_idx = 0; quant_tbl_idx < min(4, NUM_QUANT_TBLS); ++quant_tbl_idx) {
 480                 const JQUANT_TBL *qtbl = cinfo.quant_tbl_ptrs[quant_tbl_idx];
 481                 assert((qtbl == nullptr) == (quant_tbl_idx >= 2));
 482                 if (qtbl == nullptr) continue;
 483
 484                 uint8_t *qmatrix = (quant_tbl_idx == 0) ? q.lum_quantiser_matrix : q.chroma_quantiser_matrix;
 485                 for (int i = 0; i < 64; ++i) {
 486                         if (qtbl->quantval[i] > 255) {
 487                                 fprintf(stderr, "Baseline JPEG only!\n");
 488                                 abort();
 489                         }
 490                         qmatrix[i] = qtbl->quantval[jpeg_natural_order[i]];
 491                 }
 492         }
 493
 494         // Huffman tables (arithmetic is not supported).
 495         VAHuffmanTableBufferJPEGBaseline huff;
 496         memset(&huff, 0, sizeof(huff));
 497
 498         for (int huff_tbl_idx = 0; huff_tbl_idx < min(2, NUM_HUFF_TBLS); ++huff_tbl_idx) {
 499                 const JHUFF_TBL *ac_hufftbl = cinfo.ac_huff_tbl_ptrs[huff_tbl_idx];
 500                 const JHUFF_TBL *dc_hufftbl = cinfo.dc_huff_tbl_ptrs[huff_tbl_idx];
 501                 if (ac_hufftbl == nullptr) {
 502                         assert(dc_hufftbl == nullptr);
 503                         huff.load_huffman_table[huff_tbl_idx] = 0;
 504                 } else {
 505                         assert(dc_hufftbl != nullptr);
 506                         huff.load_huffman_table[huff_tbl_idx] = 1;
 507
 508                         for (int i = 0; i < 16; ++i) {
 509                                 huff.huffman_table[huff_tbl_idx].num_dc_codes[i] = dc_hufftbl->bits[i + 1];
 510                         }
 511                         for (int i = 0; i < 12; ++i) {
 512                                 huff.huffman_table[huff_tbl_idx].dc_values[i] = dc_hufftbl->huffval[i];
 513                         }
 514                         for (int i = 0; i < 16; ++i) {
 515                                 huff.huffman_table[huff_tbl_idx].num_ac_codes[i] = ac_hufftbl->bits[i + 1];
 516                         }
 517                         for (int i = 0; i < 162; ++i) {
 518                                 huff.huffman_table[huff_tbl_idx].ac_values[i] = ac_hufftbl->huffval[i];
 519                         }
 520                 }
 521         }
 522
 523         // Slice parameters (metadata about the slice).
 524         VAEncSliceParameterBufferJPEG parms;
 525         memset(&parms, 0, sizeof(parms));
 526         for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
 527                 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
 528                 parms.components[component_idx].component_selector = comp->component_id;
 529                 parms.components[component_idx].dc_table_selector = comp->dc_tbl_no;
 530                 parms.components[component_idx].ac_table_selector = comp->ac_tbl_no;
 531                 if (parms.components[component_idx].dc_table_selector > 1 ||
 532                     parms.components[component_idx].ac_table_selector > 1) {
 533                         fprintf(stderr, "Uses too many Huffman tables\n");
 534                         abort();
 535                 }
 536         }
 537         parms.num_components = cinfo.num_components;
 538         parms.restart_interval = cinfo.restart_interval;
 539
 540         jpeg_destroy_compress(&cinfo);
 541
 542         VAData ret;
 543         ret.jpeg_header = move(jpeg_header);
 544         ret.pic_param = pic_param;
 545         ret.q = q;
 546         ret.huff = huff;
 547         ret.parms = parms;
 548         va_data_for_resolution[key] = ret;
 549         return ret;
 550 }
 551
 552 vector<uint8_t> MJPEGEncoder::encode_jpeg(const QueuedFrame &qf)
 553 {
 554         if (va_dpy != nullptr) {
 555                 return encode_jpeg_va(qf);
 556         } else {
 557                 return encode_jpeg_libjpeg(qf);
 558         }
 559 }
 560
 561 vector<uint8_t> MJPEGEncoder::encode_jpeg_va(const QueuedFrame &qf)
 562 {
 563         unsigned width = qf.video_format.width;
 564         unsigned height = qf.video_format.height;
 565
 566         VAResources resources = get_va_resources(width, height);
 567         ReleaseVAResources release(this, resources);
 568
 569         VAData va_data = get_va_data_for_resolution(width, height);
 570         va_data.pic_param.coded_buf = resources.data_buffer;
 571
 572         VABufferID pic_param_buffer;
 573         VAStatus va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPictureParameterBufferType, sizeof(va_data.pic_param), 1, &va_data.pic_param, &pic_param_buffer);
 574         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 575         VABufferDestroyer destroy_pic_param(va_dpy->va_dpy, pic_param_buffer);
 576
 577         VABufferID q_buffer;
 578         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAQMatrixBufferType, sizeof(va_data.q), 1, &va_data.q, &q_buffer);
 579         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 580         VABufferDestroyer destroy_iq(va_dpy->va_dpy, q_buffer);
 581
 582         VABufferID huff_buffer;
 583         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAHuffmanTableBufferType, sizeof(va_data.huff), 1, &va_data.huff, &huff_buffer);
 584         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 585         VABufferDestroyer destroy_huff(va_dpy->va_dpy, huff_buffer);
 586
 587         VABufferID slice_param_buffer;
 588         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncSliceParameterBufferType, sizeof(va_data.parms), 1, &va_data.parms, &slice_param_buffer);
 589         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 590         VABufferDestroyer destroy_slice_param(va_dpy->va_dpy, slice_param_buffer);
 591
 592         VAImage image;
 593         va_status = vaDeriveImage(va_dpy->va_dpy, resources.surface, &image);
 594         CHECK_VASTATUS(va_status, "vaDeriveImage");
 595
 596         // Upload the pixel data.
 597         uint8_t *surface_p = nullptr;
 598         vaMapBuffer(va_dpy->va_dpy, image.buf, (void **)&surface_p);
 599
 600         size_t field_start_line = qf.video_format.extra_lines_top;  // No interlacing support.
 601         size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
 602
 603         {
 604                 const uint8_t *src = qf.frame->data_copy + field_start;
 605                 uint8_t *dst = (unsigned char *)surface_p + image.offsets[0];
 606                 memcpy_with_pitch(dst, src, qf.video_format.width * 2, image.pitches[0], qf.video_format.height);
 607         }
 608
 609         va_status = vaUnmapBuffer(va_dpy->va_dpy, image.buf);
 610         CHECK_VASTATUS(va_status, "vaUnmapBuffer");
 611         va_status = vaDestroyImage(va_dpy->va_dpy, image.image_id);
 612         CHECK_VASTATUS(va_status, "vaDestroyImage");
 613
 614         // Finally, stick in the JPEG header.
 615         VAEncPackedHeaderParameterBuffer header_parm;
 616         header_parm.type = VAEncPackedHeaderRawData;
 617         header_parm.bit_length = 8 * va_data.jpeg_header.size();
 618
 619         VABufferID header_parm_buffer;
 620         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderParameterBufferType, sizeof(header_parm), 1, &header_parm, &header_parm_buffer);
 621         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 622         VABufferDestroyer destroy_header(va_dpy->va_dpy, header_parm_buffer);
 623
 624         VABufferID header_data_buffer;
 625         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderDataBufferType, va_data.jpeg_header.size(), 1, va_data.jpeg_header.data(), &header_data_buffer);
 626         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 627         VABufferDestroyer destroy_header_data(va_dpy->va_dpy, header_data_buffer);
 628
 629         va_status = vaBeginPicture(va_dpy->va_dpy, resources.context, resources.surface);
 630         CHECK_VASTATUS(va_status, "vaBeginPicture");
 631         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &pic_param_buffer, 1);
 632         CHECK_VASTATUS(va_status, "vaRenderPicture(pic_param)");
 633         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &q_buffer, 1);
 634         CHECK_VASTATUS(va_status, "vaRenderPicture(q)");
 635         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &huff_buffer, 1);
 636         CHECK_VASTATUS(va_status, "vaRenderPicture(huff)");
 637         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &slice_param_buffer, 1);
 638         CHECK_VASTATUS(va_status, "vaRenderPicture(slice_param)");
 639         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_parm_buffer, 1);
 640         CHECK_VASTATUS(va_status, "vaRenderPicture(header_parm)");
 641         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_data_buffer, 1);
 642         CHECK_VASTATUS(va_status, "vaRenderPicture(header_data)");
 643         va_status = vaEndPicture(va_dpy->va_dpy, resources.context);
 644         CHECK_VASTATUS(va_status, "vaEndPicture");
 645
 646         va_status = vaSyncSurface(va_dpy->va_dpy, resources.surface);
 647         CHECK_VASTATUS(va_status, "vaSyncSurface");
 648
 649         VACodedBufferSegment *segment;
 650         va_status = vaMapBuffer(va_dpy->va_dpy, resources.data_buffer, (void **)&segment);
 651         CHECK_VASTATUS(va_status, "vaMapBuffer");
 652
 653         const char *coded_buf = reinterpret_cast<char *>(segment->buf);
 654         vector<uint8_t> jpeg(coded_buf, coded_buf + segment->size);
 655
 656         va_status = vaUnmapBuffer(va_dpy->va_dpy, resources.data_buffer);
 657         CHECK_VASTATUS(va_status, "vaUnmapBuffer");
 658
 659         return jpeg;
 660 }
 661
 662 vector<uint8_t> MJPEGEncoder::encode_jpeg_libjpeg(const QueuedFrame &qf)
 663 {
 664         unsigned width = qf.video_format.width;
 665         unsigned height = qf.video_format.height;
 666
 667         VectorDestinationManager dest;
 668         jpeg_compress_struct cinfo;
 669         init_jpeg_422(width, height, &dest, &cinfo);
 670
 671         size_t field_start_line = qf.video_format.extra_lines_top;  // No interlacing support.
 672         size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
 673
 674         JSAMPROW yptr[8], cbptr[8], crptr[8];
 675         JSAMPARRAY data[3] = { yptr, cbptr, crptr };
 676         for (unsigned y = 0; y < qf.video_format.height; y += 8) {
 677                 const uint8_t *src = qf.frame->data_copy + field_start + y * qf.video_format.width * 2;
 678
 679                 memcpy_interleaved(tmp_y, tmp_cbcr, src, qf.video_format.width * 8 * 2);
 680                 memcpy_interleaved(tmp_cb, tmp_cr, tmp_cbcr, qf.video_format.width * 8);
 681                 for (unsigned yy = 0; yy < 8; ++yy) {
 682                         yptr[yy] = tmp_y + yy * width;
 683                         cbptr[yy] = tmp_cb + yy * width / 2;
 684                         crptr[yy] = tmp_cr + yy * width / 2;
 685                 }
 686                 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
 687         }
 688         jpeg_finish_compress(&cinfo);
 689
 690         return dest.dest;
 691 }