git.sesse.net Git - nageru/blob - 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 "ffmpeg_raii.h"
  16 #include "flags.h"
  17 #include "httpd.h"
  18 #include "memcpy_interleaved.h"
  19 #include "pbo_frame_allocator.h"
  20 #include "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 void MJPEGEncoder::stop()
 181 {
 182         if (!running) {
 183                 return;
 184         }
 185         running = false;
 186         should_quit = true;
 187         any_frames_to_be_encoded.notify_all();
 188         encoder_thread.join();
 189 }
 190
 191 unique_ptr<VADisplayWithCleanup> MJPEGEncoder::try_open_va(const string &va_display, string *error, VAConfigID *config_id)
 192 {
 193         unique_ptr<VADisplayWithCleanup> va_dpy = va_open_display(va_display);
 194         if (va_dpy == nullptr) {
 195                 if (error) *error = "Opening VA display failed";
 196                 return nullptr;
 197         }
 198         int major_ver, minor_ver;
 199         VAStatus va_status = vaInitialize(va_dpy->va_dpy, &major_ver, &minor_ver);
 200         if (va_status != VA_STATUS_SUCCESS) {
 201                 char buf[256];
 202                 snprintf(buf, sizeof(buf), "vaInitialize() failed with status %d\n", va_status);
 203                 if (error != nullptr) *error = buf;
 204                 return nullptr;
 205         }
 206
 207         VAConfigAttrib attr = { VAConfigAttribRTFormat, VA_RT_FORMAT_YUV422 };
 208         va_status = vaCreateConfig(va_dpy->va_dpy, VAProfileJPEGBaseline, VAEntrypointEncPicture,
 209                 &attr, 1, config_id);
 210         if (va_status == VA_STATUS_ERROR_UNSUPPORTED_ENTRYPOINT) {
 211                 if (error != nullptr) *error = "No hardware support";
 212                 return nullptr;
 213         } else if (va_status != VA_STATUS_SUCCESS) {
 214                 char buf[256];
 215                 snprintf(buf, sizeof(buf), "vaCreateConfig() failed with status %d\n", va_status);
 216                 if (error != nullptr) *error = buf;
 217                 return nullptr;
 218         }
 219
 220         int num_formats = vaMaxNumImageFormats(va_dpy->va_dpy);
 221         assert(num_formats > 0);
 222
 223         unique_ptr<VAImageFormat[]> formats(new VAImageFormat[num_formats]);
 224         va_status = vaQueryImageFormats(va_dpy->va_dpy, formats.get(), &num_formats);
 225         if (va_status != VA_STATUS_SUCCESS) {
 226                 char buf[256];
 227                 snprintf(buf, sizeof(buf), "vaQueryImageFormats() failed with status %d\n", va_status);
 228                 if (error != nullptr) *error = buf;
 229                 return nullptr;
 230         }
 231
 232         return va_dpy;
 233 }
 234
 235 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)
 236 {
 237         PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)frame->userdata;
 238         if (video_format.width == 0 || video_format.height == 0) {
 239                 return;
 240         }
 241         if (video_format.interlaced) {
 242                 fprintf(stderr, "Card %u: Ignoring JPEG encoding for interlaced frame\n", card_index);
 243                 return;
 244         }
 245         if (userdata->pixel_format != PixelFormat_8BitYCbCr ||
 246             !frame->interleaved) {
 247                 fprintf(stderr, "Card %u: Ignoring JPEG encoding for unsupported pixel format\n", card_index);
 248                 return;
 249         }
 250         if (video_format.width > 4096 || video_format.height > 4096) {
 251                 fprintf(stderr, "Card %u: Ignoring JPEG encoding for oversized frame\n", card_index);
 252                 return;
 253         }
 254
 255         lock_guard<mutex> lock(mu);
 256         frames_to_be_encoded.push(QueuedFrame{ pts, card_index, frame, video_format, y_offset, cbcr_offset });
 257         any_frames_to_be_encoded.notify_all();
 258 }
 259
 260 void MJPEGEncoder::encoder_thread_func()
 261 {
 262         pthread_setname_np(pthread_self(), "MJPEG_Encode");
 263         posix_memalign((void **)&tmp_y, 4096, 4096 * 8);
 264         posix_memalign((void **)&tmp_cbcr, 4096, 4096 * 8);
 265         posix_memalign((void **)&tmp_cb, 4096, 4096 * 8);
 266         posix_memalign((void **)&tmp_cr, 4096, 4096 * 8);
 267
 268         unique_lock<mutex> lock(mu);
 269         for (;;) {
 270                 any_frames_to_be_encoded.wait(lock, [this] { return !frames_to_be_encoded.empty() || should_quit; });
 271                 if (should_quit) return;
 272                 QueuedFrame qf = move(frames_to_be_encoded.front());
 273                 frames_to_be_encoded.pop();
 274
 275                 vector<uint8_t> jpeg = encode_jpeg(qf);
 276
 277                 AVPacket pkt;
 278                 memset(&pkt, 0, sizeof(pkt));
 279                 pkt.buf = nullptr;
 280                 pkt.data = &jpeg[0];
 281                 pkt.size = jpeg.size();
 282                 pkt.stream_index = qf.card_index;
 283                 pkt.flags = AV_PKT_FLAG_KEY;
 284                 pkt.pts = pkt.dts = qf.pts;
 285
 286                 if (av_write_frame(avctx.get(), &pkt) < 0) {
 287                         fprintf(stderr, "av_write_frame() failed\n");
 288                         exit(1);
 289                 }
 290         }
 291 }
 292
 293 class VABufferDestroyer {
 294 public:
 295         VABufferDestroyer(VADisplay dpy, VABufferID buf)
 296                 : dpy(dpy), buf(buf) {}
 297
 298         ~VABufferDestroyer() {
 299                 VAStatus va_status = vaDestroyBuffer(dpy, buf);
 300                 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
 301         }
 302
 303 private:
 304         VADisplay dpy;
 305         VABufferID buf;
 306 };
 307
 308 MJPEGEncoder::VAResources MJPEGEncoder::get_va_resources(unsigned width, unsigned height)
 309 {
 310         {
 311                 lock_guard<mutex> lock(va_resources_mutex);
 312                 for (auto it = va_resources_freelist.begin(); it != va_resources_freelist.end(); ++it) {
 313                         if (it->width == width && it->height == height) {
 314                                 VAResources ret = *it;
 315                                 va_resources_freelist.erase(it);
 316                                 return ret;
 317                         }
 318                 }
 319         }
 320
 321         VAResources ret;
 322
 323         ret.width = width;
 324         ret.height = height;
 325
 326         VASurfaceAttrib attrib;
 327         attrib.flags = VA_SURFACE_ATTRIB_SETTABLE;
 328         attrib.type = VASurfaceAttribPixelFormat;
 329         attrib.value.type = VAGenericValueTypeInteger;
 330         attrib.value.value.i = VA_FOURCC_UYVY;
 331
 332         VAStatus va_status = vaCreateSurfaces(va_dpy->va_dpy, VA_RT_FORMAT_YUV422,
 333                 width, height,
 334                 &ret.surface, 1, &attrib, 1);
 335         CHECK_VASTATUS(va_status, "vaCreateSurfaces");
 336
 337         va_status = vaCreateContext(va_dpy->va_dpy, config_id, width, height, 0, &ret.surface, 1, &ret.context);
 338         CHECK_VASTATUS(va_status, "vaCreateContext");
 339
 340         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncCodedBufferType, width * height * 3 + 8192, 1, nullptr, &ret.data_buffer);
 341         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 342
 343         return ret;
 344 }
 345
 346 void MJPEGEncoder::release_va_resources(MJPEGEncoder::VAResources resources)
 347 {
 348         lock_guard<mutex> lock(va_resources_mutex);
 349         if (va_resources_freelist.size() > 10) {
 350                 auto it = va_resources_freelist.end();
 351                 --it;
 352
 353                 VAStatus va_status = vaDestroyBuffer(va_dpy->va_dpy, it->data_buffer);
 354                 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
 355
 356                 va_status = vaDestroyContext(va_dpy->va_dpy, it->context);
 357                 CHECK_VASTATUS(va_status, "vaDestroyContext");
 358
 359                 va_status = vaDestroySurfaces(va_dpy->va_dpy, &it->surface, 1);
 360                 CHECK_VASTATUS(va_status, "vaDestroySurfaces");
 361
 362                 va_resources_freelist.erase(it);
 363         }
 364
 365         va_resources_freelist.push_front(resources);
 366 }
 367
 368 void MJPEGEncoder::init_jpeg_422(unsigned width, unsigned height, VectorDestinationManager *dest, jpeg_compress_struct *cinfo)
 369 {
 370         jpeg_error_mgr jerr;
 371         cinfo->err = jpeg_std_error(&jerr);
 372         jpeg_create_compress(cinfo);
 373
 374         cinfo->dest = (jpeg_destination_mgr *)dest;
 375
 376         cinfo->input_components = 3;
 377         jpeg_set_defaults(cinfo);
 378         jpeg_set_quality(cinfo, quality, /*force_baseline=*/false);
 379
 380         cinfo->image_width = width;
 381         cinfo->image_height = height;
 382         cinfo->raw_data_in = true;
 383         jpeg_set_colorspace(cinfo, JCS_YCbCr);
 384         cinfo->comp_info[0].h_samp_factor = 2;
 385         cinfo->comp_info[0].v_samp_factor = 1;
 386         cinfo->comp_info[1].h_samp_factor = 1;
 387         cinfo->comp_info[1].v_samp_factor = 1;
 388         cinfo->comp_info[2].h_samp_factor = 1;
 389         cinfo->comp_info[2].v_samp_factor = 1;
 390         cinfo->CCIR601_sampling = true;  // Seems to be mostly ignored by libjpeg, though.
 391         jpeg_start_compress(cinfo, true);
 392 }
 393
 394 vector<uint8_t> MJPEGEncoder::get_jpeg_header(unsigned width, unsigned height, jpeg_compress_struct *cinfo)
 395 {
 396         VectorDestinationManager dest;
 397         init_jpeg_422(width, height, &dest, cinfo);
 398
 399         // Make a dummy black image; there's seemingly no other easy way of
 400         // making libjpeg outputting all of its headers.
 401         JSAMPROW yptr[8], cbptr[8], crptr[8];
 402         JSAMPARRAY data[3] = { yptr, cbptr, crptr };
 403         memset(tmp_y, 0, 4096);
 404         memset(tmp_cb, 0, 4096);
 405         memset(tmp_cr, 0, 4096);
 406         for (unsigned yy = 0; yy < 8; ++yy) {
 407                 yptr[yy] = tmp_y;
 408                 cbptr[yy] = tmp_cb;
 409                 crptr[yy] = tmp_cr;
 410         }
 411         for (unsigned y = 0; y < height; y += 8) {
 412                 jpeg_write_raw_data(cinfo, data, /*num_lines=*/8);
 413         }
 414         jpeg_finish_compress(cinfo);
 415
 416         // We're only interested in the header, not the data after it.
 417         dest.term_destination();
 418         for (size_t i = 0; i < dest.dest.size() - 1; ++i) {
 419                 if (dest.dest[i] == 0xff && dest.dest[i + 1] == 0xda) {  // Start of scan (SOS).
 420                         unsigned len = dest.dest[i + 2] * 256 + dest.dest[i + 3];
 421                         dest.dest.resize(i + len + 2);
 422                         break;
 423                 }
 424         }
 425
 426         return dest.dest;
 427 }
 428
 429 MJPEGEncoder::VAData MJPEGEncoder::get_va_data_for_resolution(unsigned width, unsigned height)
 430 {
 431         pair<unsigned, unsigned> key(width, height);
 432         if (va_data_for_resolution.count(key)) {
 433                 return va_data_for_resolution[key];
 434         }
 435
 436         // Use libjpeg to generate a header and set sane defaults for e.g.
 437         // quantization tables. Then do the actual encode with VA-API.
 438         jpeg_compress_struct cinfo;
 439         vector<uint8_t> jpeg_header = get_jpeg_header(width, height, &cinfo);
 440
 441         // Picture parameters.
 442         VAEncPictureParameterBufferJPEG pic_param;
 443         memset(&pic_param, 0, sizeof(pic_param));
 444         pic_param.reconstructed_picture = VA_INVALID_ID;
 445         pic_param.picture_width = cinfo.image_width;
 446         pic_param.picture_height = cinfo.image_height;
 447         for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
 448                 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
 449                 pic_param.component_id[component_idx] = comp->component_id;
 450                 pic_param.quantiser_table_selector[component_idx] = comp->quant_tbl_no;
 451         }
 452         pic_param.num_components = cinfo.num_components;
 453         pic_param.num_scan = 1;
 454         pic_param.sample_bit_depth = 8;
 455         pic_param.coded_buf = VA_INVALID_ID;  // To be filled out by caller.
 456         pic_param.pic_flags.bits.huffman = 1;
 457         pic_param.quality = 50;  // Don't scale the given quantization matrices. (See gen8_mfc_jpeg_fqm_state)
 458
 459         // Quantization matrices.
 460         VAQMatrixBufferJPEG q;
 461         memset(&q, 0, sizeof(q));
 462
 463         q.load_lum_quantiser_matrix = true;
 464         q.load_chroma_quantiser_matrix = true;
 465         for (int quant_tbl_idx = 0; quant_tbl_idx < min(4, NUM_QUANT_TBLS); ++quant_tbl_idx) {
 466                 const JQUANT_TBL *qtbl = cinfo.quant_tbl_ptrs[quant_tbl_idx];
 467                 assert((qtbl == nullptr) == (quant_tbl_idx >= 2));
 468                 if (qtbl == nullptr) continue;
 469
 470                 uint8_t *qmatrix = (quant_tbl_idx == 0) ? q.lum_quantiser_matrix : q.chroma_quantiser_matrix;
 471                 for (int i = 0; i < 64; ++i) {
 472                         if (qtbl->quantval[i] > 255) {
 473                                 fprintf(stderr, "Baseline JPEG only!\n");
 474                                 abort();
 475                         }
 476                         qmatrix[i] = qtbl->quantval[jpeg_natural_order[i]];
 477                 }
 478         }
 479
 480         // Huffman tables (arithmetic is not supported).
 481         VAHuffmanTableBufferJPEGBaseline huff;
 482         memset(&huff, 0, sizeof(huff));
 483
 484         for (int huff_tbl_idx = 0; huff_tbl_idx < min(2, NUM_HUFF_TBLS); ++huff_tbl_idx) {
 485                 const JHUFF_TBL *ac_hufftbl = cinfo.ac_huff_tbl_ptrs[huff_tbl_idx];
 486                 const JHUFF_TBL *dc_hufftbl = cinfo.dc_huff_tbl_ptrs[huff_tbl_idx];
 487                 if (ac_hufftbl == nullptr) {
 488                         assert(dc_hufftbl == nullptr);
 489                         huff.load_huffman_table[huff_tbl_idx] = 0;
 490                 } else {
 491                         assert(dc_hufftbl != nullptr);
 492                         huff.load_huffman_table[huff_tbl_idx] = 1;
 493
 494                         for (int i = 0; i < 16; ++i) {
 495                                 huff.huffman_table[huff_tbl_idx].num_dc_codes[i] = dc_hufftbl->bits[i + 1];
 496                         }
 497                         for (int i = 0; i < 12; ++i) {
 498                                 huff.huffman_table[huff_tbl_idx].dc_values[i] = dc_hufftbl->huffval[i];
 499                         }
 500                         for (int i = 0; i < 16; ++i) {
 501                                 huff.huffman_table[huff_tbl_idx].num_ac_codes[i] = ac_hufftbl->bits[i + 1];
 502                         }
 503                         for (int i = 0; i < 162; ++i) {
 504                                 huff.huffman_table[huff_tbl_idx].ac_values[i] = ac_hufftbl->huffval[i];
 505                         }
 506                 }
 507         }
 508
 509         // Slice parameters (metadata about the slice).
 510         VAEncSliceParameterBufferJPEG parms;
 511         memset(&parms, 0, sizeof(parms));
 512         for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
 513                 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
 514                 parms.components[component_idx].component_selector = comp->component_id;
 515                 parms.components[component_idx].dc_table_selector = comp->dc_tbl_no;
 516                 parms.components[component_idx].ac_table_selector = comp->ac_tbl_no;
 517                 if (parms.components[component_idx].dc_table_selector > 1 ||
 518                     parms.components[component_idx].ac_table_selector > 1) {
 519                         fprintf(stderr, "Uses too many Huffman tables\n");
 520                         abort();
 521                 }
 522         }
 523         parms.num_components = cinfo.num_components;
 524         parms.restart_interval = cinfo.restart_interval;
 525
 526         jpeg_destroy_compress(&cinfo);
 527
 528         VAData ret;
 529         ret.jpeg_header = move(jpeg_header);
 530         ret.pic_param = pic_param;
 531         ret.q = q;
 532         ret.huff = huff;
 533         ret.parms = parms;
 534         va_data_for_resolution[key] = ret;
 535         return ret;
 536 }
 537
 538 vector<uint8_t> MJPEGEncoder::encode_jpeg(const QueuedFrame &qf)
 539 {
 540         if (va_dpy != nullptr) {
 541                 return encode_jpeg_va(qf);
 542         } else {
 543                 return encode_jpeg_libjpeg(qf);
 544         }
 545 }
 546
 547 vector<uint8_t> MJPEGEncoder::encode_jpeg_va(const QueuedFrame &qf)
 548 {
 549         unsigned width = qf.video_format.width;
 550         unsigned height = qf.video_format.height;
 551
 552         VAResources resources = get_va_resources(width, height);
 553         ReleaseVAResources release(this, resources);
 554
 555         VAData va_data = get_va_data_for_resolution(width, height);
 556         va_data.pic_param.coded_buf = resources.data_buffer;
 557
 558         VABufferID pic_param_buffer;
 559         VAStatus va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPictureParameterBufferType, sizeof(va_data.pic_param), 1, &va_data.pic_param, &pic_param_buffer);
 560         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 561         VABufferDestroyer destroy_pic_param(va_dpy->va_dpy, pic_param_buffer);
 562
 563         VABufferID q_buffer;
 564         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAQMatrixBufferType, sizeof(va_data.q), 1, &va_data.q, &q_buffer);
 565         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 566         VABufferDestroyer destroy_iq(va_dpy->va_dpy, q_buffer);
 567
 568         VABufferID huff_buffer;
 569         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAHuffmanTableBufferType, sizeof(va_data.huff), 1, &va_data.huff, &huff_buffer);
 570         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 571         VABufferDestroyer destroy_huff(va_dpy->va_dpy, huff_buffer);
 572
 573         VABufferID slice_param_buffer;
 574         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncSliceParameterBufferType, sizeof(va_data.parms), 1, &va_data.parms, &slice_param_buffer);
 575         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 576         VABufferDestroyer destroy_slice_param(va_dpy->va_dpy, slice_param_buffer);
 577
 578         VAImage image;
 579         va_status = vaDeriveImage(va_dpy->va_dpy, resources.surface, &image);
 580         CHECK_VASTATUS(va_status, "vaDeriveImage");
 581
 582         // Upload the pixel data.
 583         uint8_t *surface_p = nullptr;
 584         vaMapBuffer(va_dpy->va_dpy, image.buf, (void **)&surface_p);
 585
 586         size_t field_start_line = qf.video_format.extra_lines_top;  // No interlacing support.
 587         size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
 588
 589         {
 590                 const uint8_t *src = qf.frame->data_copy + field_start;
 591                 uint8_t *dst = (unsigned char *)surface_p + image.offsets[0];
 592                 memcpy_with_pitch(dst, src, qf.video_format.width * 2, image.pitches[0], qf.video_format.height);
 593         }
 594
 595         va_status = vaUnmapBuffer(va_dpy->va_dpy, image.buf);
 596         CHECK_VASTATUS(va_status, "vaUnmapBuffer");
 597         va_status = vaDestroyImage(va_dpy->va_dpy, image.image_id);
 598         CHECK_VASTATUS(va_status, "vaDestroyImage");
 599
 600         // Finally, stick in the JPEG header.
 601         VAEncPackedHeaderParameterBuffer header_parm;
 602         header_parm.type = VAEncPackedHeaderRawData;
 603         header_parm.bit_length = 8 * va_data.jpeg_header.size();
 604
 605         VABufferID header_parm_buffer;
 606         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderParameterBufferType, sizeof(header_parm), 1, &header_parm, &header_parm_buffer);
 607         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 608         VABufferDestroyer destroy_header(va_dpy->va_dpy, header_parm_buffer);
 609
 610         VABufferID header_data_buffer;
 611         va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderDataBufferType, va_data.jpeg_header.size(), 1, va_data.jpeg_header.data(), &header_data_buffer);
 612         CHECK_VASTATUS(va_status, "vaCreateBuffer");
 613         VABufferDestroyer destroy_header_data(va_dpy->va_dpy, header_data_buffer);
 614
 615         va_status = vaBeginPicture(va_dpy->va_dpy, resources.context, resources.surface);
 616         CHECK_VASTATUS(va_status, "vaBeginPicture");
 617         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &pic_param_buffer, 1);
 618         CHECK_VASTATUS(va_status, "vaRenderPicture(pic_param)");
 619         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &q_buffer, 1);
 620         CHECK_VASTATUS(va_status, "vaRenderPicture(q)");
 621         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &huff_buffer, 1);
 622         CHECK_VASTATUS(va_status, "vaRenderPicture(huff)");
 623         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &slice_param_buffer, 1);
 624         CHECK_VASTATUS(va_status, "vaRenderPicture(slice_param)");
 625         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_parm_buffer, 1);
 626         CHECK_VASTATUS(va_status, "vaRenderPicture(header_parm)");
 627         va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_data_buffer, 1);
 628         CHECK_VASTATUS(va_status, "vaRenderPicture(header_data)");
 629         va_status = vaEndPicture(va_dpy->va_dpy, resources.context);
 630         CHECK_VASTATUS(va_status, "vaEndPicture");
 631
 632         va_status = vaSyncSurface(va_dpy->va_dpy, resources.surface);
 633         CHECK_VASTATUS(va_status, "vaSyncSurface");
 634
 635         VACodedBufferSegment *segment;
 636         va_status = vaMapBuffer(va_dpy->va_dpy, resources.data_buffer, (void **)&segment);
 637         CHECK_VASTATUS(va_status, "vaMapBuffer");
 638
 639         const char *coded_buf = reinterpret_cast<char *>(segment->buf);
 640         vector<uint8_t> jpeg(coded_buf, coded_buf + segment->size);
 641
 642         va_status = vaUnmapBuffer(va_dpy->va_dpy, resources.data_buffer);
 643         CHECK_VASTATUS(va_status, "vaUnmapBuffer");
 644
 645         return jpeg;
 646 }
 647
 648 vector<uint8_t> MJPEGEncoder::encode_jpeg_libjpeg(const QueuedFrame &qf)
 649 {
 650         unsigned width = qf.video_format.width;
 651         unsigned height = qf.video_format.height;
 652
 653         VectorDestinationManager dest;
 654         jpeg_compress_struct cinfo;
 655         init_jpeg_422(width, height, &dest, &cinfo);
 656
 657         size_t field_start_line = qf.video_format.extra_lines_top;  // No interlacing support.
 658         size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
 659
 660         JSAMPROW yptr[8], cbptr[8], crptr[8];
 661         JSAMPARRAY data[3] = { yptr, cbptr, crptr };
 662         for (unsigned y = 0; y < qf.video_format.height; y += 8) {
 663                 const uint8_t *src = qf.frame->data_copy + field_start + y * qf.video_format.width * 2;
 664
 665                 memcpy_interleaved(tmp_y, tmp_cbcr, src, qf.video_format.width * 8 * 2);
 666                 memcpy_interleaved(tmp_cb, tmp_cr, tmp_cbcr, qf.video_format.width * 8);
 667                 for (unsigned yy = 0; yy < 8; ++yy) {
 668                         yptr[yy] = tmp_y + yy * width;
 669                         cbptr[yy] = tmp_cb + yy * width / 2;
 670                         crptr[yy] = tmp_cr + yy * width / 2;
 671                 }
 672                 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
 673         }
 674         jpeg_finish_compress(&cinfo);
 675
 676         return dest.dest;
 677 }