1 #include "mjpeg_encoder.h"
11 #include <libavformat/avformat.h>
15 #include "shared/ffmpeg_raii.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"
24 #include <va/va_drm.h>
25 #include <va/va_x11.h>
27 using namespace bmusb;
30 extern void memcpy_with_pitch(uint8_t *dst, const uint8_t *src, size_t src_width, size_t dst_pitch, size_t height);
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); \
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,
50 struct VectorDestinationManager {
51 jpeg_destination_mgr pub;
52 std::vector<uint8_t> dest;
54 VectorDestinationManager()
56 pub.init_destination = init_destination_thunk;
57 pub.empty_output_buffer = empty_output_buffer_thunk;
58 pub.term_destination = term_destination_thunk;
61 static void init_destination_thunk(j_compress_ptr ptr)
63 ((VectorDestinationManager *)(ptr->dest))->init_destination();
66 inline void init_destination()
71 static boolean empty_output_buffer_thunk(j_compress_ptr ptr)
73 return ((VectorDestinationManager *)(ptr->dest))->empty_output_buffer();
76 inline bool empty_output_buffer()
78 make_room(dest.size()); // Should ignore pub.free_in_buffer!
82 inline void make_room(size_t bytes_used)
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;
90 static void term_destination_thunk(j_compress_ptr ptr)
92 ((VectorDestinationManager *)(ptr->dest))->term_destination();
95 inline void term_destination()
97 dest.resize(dest.size() - pub.free_in_buffer);
100 static_assert(std::is_standard_layout<VectorDestinationManager>::value, "");
102 int MJPEGEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
104 MJPEGEncoder *engine = (MJPEGEncoder *)opaque;
105 return engine->write_packet2(buf, buf_size, type, time);
108 int MJPEGEncoder::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
110 if (type == AVIO_DATA_MARKER_HEADER) {
111 mux_header.append((char *)buf, buf_size);
112 httpd->set_header(HTTPD::MULTICAM_STREAM, mux_header);
114 httpd->add_data(HTTPD::MULTICAM_STREAM, (char *)buf, buf_size, /*keyframe=*/true, AV_NOPTS_VALUE, AVRational{ AV_TIME_BASE, 1 });
119 MJPEGEncoder::MJPEGEncoder(HTTPD *httpd, const string &va_display)
122 // Set up the mux. We don't use the Mux wrapper, because it's geared towards
123 // a situation with only one video stream (and possibly one audio stream)
124 // with known width/height, and we don't need the extra functionality it provides.
125 avctx.reset(avformat_alloc_context());
126 avctx->oformat = av_guess_format("mp4", nullptr, nullptr);
128 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
129 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
130 avctx->pb->write_data_type = &MJPEGEncoder::write_packet2_thunk;
131 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
133 for (unsigned card_idx = 0; card_idx < global_flags.card_to_mjpeg_stream_export.size(); ++card_idx) {
134 AVStream *stream = avformat_new_stream(avctx.get(), nullptr);
135 if (stream == nullptr) {
136 fprintf(stderr, "avformat_new_stream() failed\n");
139 stream->time_base = AVRational{ 1, TIMEBASE };
140 stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
141 stream->codecpar->codec_id = AV_CODEC_ID_MJPEG;
143 // Used for aspect ratio only. Can change without notice (the mux won't care).
144 stream->codecpar->width = global_flags.width;
145 stream->codecpar->height = global_flags.height;
147 // TODO: We could perhaps use the interpretation for each card here
148 // (or at least the command-line flags) instead of the defaults,
149 // but what would we do when they change?
150 stream->codecpar->color_primaries = AVCOL_PRI_BT709;
151 stream->codecpar->color_trc = AVCOL_TRC_IEC61966_2_1;
152 stream->codecpar->color_space = AVCOL_SPC_BT709;
153 stream->codecpar->color_range = AVCOL_RANGE_MPEG;
154 stream->codecpar->chroma_location = AVCHROMA_LOC_LEFT;
155 stream->codecpar->field_order = AV_FIELD_PROGRESSIVE;
158 AVDictionary *options = NULL;
159 vector<pair<string, string>> opts = MUX_OPTS;
160 for (pair<string, string> opt : opts) {
161 av_dict_set(&options, opt.first.c_str(), opt.second.c_str(), 0);
163 if (avformat_write_header(avctx.get(), &options) < 0) {
164 fprintf(stderr, "avformat_write_header() failed\n");
168 // Initialize VA-API.
170 va_dpy = try_open_va(va_display, &error, &config_id);
171 if (va_dpy == nullptr) {
172 fprintf(stderr, "Could not initialize VA-API for MJPEG encoding: %s. JPEGs will be encoded in software if needed.\n", error.c_str());
175 encoder_thread = thread(&MJPEGEncoder::encoder_thread_func, this);
176 if (va_dpy != nullptr) {
177 va_receiver_thread = thread(&MJPEGEncoder::va_receiver_thread_func, this);
183 MJPEGEncoder::~MJPEGEncoder()
185 av_free(avctx->pb->buffer);
188 void MJPEGEncoder::stop()
195 any_frames_to_be_encoded.notify_all();
196 encoder_thread.join();
197 if (va_dpy != nullptr) {
198 va_receiver_thread.join();
202 unique_ptr<VADisplayWithCleanup> MJPEGEncoder::try_open_va(const string &va_display, string *error, VAConfigID *config_id)
204 unique_ptr<VADisplayWithCleanup> va_dpy = va_open_display(va_display);
205 if (va_dpy == nullptr) {
206 if (error) *error = "Opening VA display failed";
209 int major_ver, minor_ver;
210 VAStatus va_status = vaInitialize(va_dpy->va_dpy, &major_ver, &minor_ver);
211 if (va_status != VA_STATUS_SUCCESS) {
213 snprintf(buf, sizeof(buf), "vaInitialize() failed with status %d\n", va_status);
214 if (error != nullptr) *error = buf;
218 VAConfigAttrib attr = { VAConfigAttribRTFormat, VA_RT_FORMAT_YUV422 };
219 va_status = vaCreateConfig(va_dpy->va_dpy, VAProfileJPEGBaseline, VAEntrypointEncPicture,
220 &attr, 1, config_id);
221 if (va_status == VA_STATUS_ERROR_UNSUPPORTED_ENTRYPOINT) {
222 if (error != nullptr) *error = "No hardware support";
224 } else if (va_status != VA_STATUS_SUCCESS) {
226 snprintf(buf, sizeof(buf), "vaCreateConfig() failed with status %d\n", va_status);
227 if (error != nullptr) *error = buf;
231 int num_formats = vaMaxNumImageFormats(va_dpy->va_dpy);
232 assert(num_formats > 0);
234 unique_ptr<VAImageFormat[]> formats(new VAImageFormat[num_formats]);
235 va_status = vaQueryImageFormats(va_dpy->va_dpy, formats.get(), &num_formats);
236 if (va_status != VA_STATUS_SUCCESS) {
238 snprintf(buf, sizeof(buf), "vaQueryImageFormats() failed with status %d\n", va_status);
239 if (error != nullptr) *error = buf;
246 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)
248 PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)frame->userdata;
249 if (video_format.width == 0 || video_format.height == 0) {
252 if (video_format.interlaced) {
253 fprintf(stderr, "Card %u: Ignoring JPEG encoding for interlaced frame\n", card_index);
256 if (userdata->pixel_format != PixelFormat_8BitYCbCr ||
257 !frame->interleaved) {
258 fprintf(stderr, "Card %u: Ignoring JPEG encoding for unsupported pixel format\n", card_index);
261 if (video_format.width > 4096 || video_format.height > 4096) {
262 fprintf(stderr, "Card %u: Ignoring JPEG encoding for oversized frame\n", card_index);
266 lock_guard<mutex> lock(mu);
267 if (frames_to_be_encoded.size() + frames_encoding.size() > 10) {
268 fprintf(stderr, "WARNING: MJPEG encoding doesn't keep up, discarding frame.\n");
271 frames_to_be_encoded.push(QueuedFrame{ pts, card_index, frame, video_format, y_offset, cbcr_offset });
272 any_frames_to_be_encoded.notify_all();
275 void MJPEGEncoder::encoder_thread_func()
277 pthread_setname_np(pthread_self(), "MJPEG_Encode");
278 posix_memalign((void **)&tmp_y, 4096, 4096 * 8);
279 posix_memalign((void **)&tmp_cbcr, 4096, 4096 * 8);
280 posix_memalign((void **)&tmp_cb, 4096, 4096 * 8);
281 posix_memalign((void **)&tmp_cr, 4096, 4096 * 8);
286 unique_lock<mutex> lock(mu);
287 any_frames_to_be_encoded.wait(lock, [this] { return !frames_to_be_encoded.empty() || should_quit; });
288 if (should_quit) break;
289 qf = move(frames_to_be_encoded.front());
290 frames_to_be_encoded.pop();
293 if (va_dpy != nullptr) {
294 // Will call back in the receiver thread.
295 encode_jpeg_va(move(qf));
297 // Encode synchronously, in the same thread.
298 vector<uint8_t> jpeg = encode_jpeg_libjpeg(qf);
299 write_mjpeg_packet(qf.pts, qf.card_index, jpeg);
309 void MJPEGEncoder::write_mjpeg_packet(int64_t pts, unsigned card_index, const vector<uint8_t> &jpeg)
312 memset(&pkt, 0, sizeof(pkt));
314 pkt.data = const_cast<uint8_t *>(&jpeg[0]);
315 pkt.size = jpeg.size();
316 pkt.stream_index = card_index;
317 pkt.flags = AV_PKT_FLAG_KEY;
318 pkt.pts = pkt.dts = pts;
320 if (av_write_frame(avctx.get(), &pkt) < 0) {
321 fprintf(stderr, "av_write_frame() failed\n");
326 class VABufferDestroyer {
328 VABufferDestroyer(VADisplay dpy, VABufferID buf)
329 : dpy(dpy), buf(buf) {}
331 ~VABufferDestroyer() {
332 VAStatus va_status = vaDestroyBuffer(dpy, buf);
333 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
341 MJPEGEncoder::VAResources MJPEGEncoder::get_va_resources(unsigned width, unsigned height)
344 lock_guard<mutex> lock(va_resources_mutex);
345 for (auto it = va_resources_freelist.begin(); it != va_resources_freelist.end(); ++it) {
346 if (it->width == width && it->height == height) {
347 VAResources ret = *it;
348 va_resources_freelist.erase(it);
359 VASurfaceAttrib attrib;
360 attrib.flags = VA_SURFACE_ATTRIB_SETTABLE;
361 attrib.type = VASurfaceAttribPixelFormat;
362 attrib.value.type = VAGenericValueTypeInteger;
363 attrib.value.value.i = VA_FOURCC_UYVY;
365 VAStatus va_status = vaCreateSurfaces(va_dpy->va_dpy, VA_RT_FORMAT_YUV422,
367 &ret.surface, 1, &attrib, 1);
368 CHECK_VASTATUS(va_status, "vaCreateSurfaces");
370 va_status = vaCreateContext(va_dpy->va_dpy, config_id, width, height, 0, &ret.surface, 1, &ret.context);
371 CHECK_VASTATUS(va_status, "vaCreateContext");
373 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncCodedBufferType, width * height * 3 + 8192, 1, nullptr, &ret.data_buffer);
374 CHECK_VASTATUS(va_status, "vaCreateBuffer");
379 void MJPEGEncoder::release_va_resources(MJPEGEncoder::VAResources resources)
381 lock_guard<mutex> lock(va_resources_mutex);
382 if (va_resources_freelist.size() > 10) {
383 auto it = va_resources_freelist.end();
386 VAStatus va_status = vaDestroyBuffer(va_dpy->va_dpy, it->data_buffer);
387 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
389 va_status = vaDestroyContext(va_dpy->va_dpy, it->context);
390 CHECK_VASTATUS(va_status, "vaDestroyContext");
392 va_status = vaDestroySurfaces(va_dpy->va_dpy, &it->surface, 1);
393 CHECK_VASTATUS(va_status, "vaDestroySurfaces");
395 va_resources_freelist.erase(it);
398 va_resources_freelist.push_front(resources);
401 void MJPEGEncoder::init_jpeg_422(unsigned width, unsigned height, VectorDestinationManager *dest, jpeg_compress_struct *cinfo)
404 cinfo->err = jpeg_std_error(&jerr);
405 jpeg_create_compress(cinfo);
407 cinfo->dest = (jpeg_destination_mgr *)dest;
409 cinfo->input_components = 3;
410 jpeg_set_defaults(cinfo);
411 jpeg_set_quality(cinfo, quality, /*force_baseline=*/false);
413 cinfo->image_width = width;
414 cinfo->image_height = height;
415 cinfo->raw_data_in = true;
416 jpeg_set_colorspace(cinfo, JCS_YCbCr);
417 cinfo->comp_info[0].h_samp_factor = 2;
418 cinfo->comp_info[0].v_samp_factor = 1;
419 cinfo->comp_info[1].h_samp_factor = 1;
420 cinfo->comp_info[1].v_samp_factor = 1;
421 cinfo->comp_info[2].h_samp_factor = 1;
422 cinfo->comp_info[2].v_samp_factor = 1;
423 cinfo->CCIR601_sampling = true; // Seems to be mostly ignored by libjpeg, though.
424 jpeg_start_compress(cinfo, true);
426 // This comment marker is private to FFmpeg. It signals limited Y'CbCr range
427 // (and nothing else).
428 jpeg_write_marker(cinfo, JPEG_COM, (const JOCTET *)"CS=ITU601", strlen("CS=ITU601"));
431 vector<uint8_t> MJPEGEncoder::get_jpeg_header(unsigned width, unsigned height, jpeg_compress_struct *cinfo)
433 VectorDestinationManager dest;
434 init_jpeg_422(width, height, &dest, cinfo);
436 // Make a dummy black image; there's seemingly no other easy way of
437 // making libjpeg outputting all of its headers.
438 JSAMPROW yptr[8], cbptr[8], crptr[8];
439 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
440 memset(tmp_y, 0, 4096);
441 memset(tmp_cb, 0, 4096);
442 memset(tmp_cr, 0, 4096);
443 for (unsigned yy = 0; yy < 8; ++yy) {
448 for (unsigned y = 0; y < height; y += 8) {
449 jpeg_write_raw_data(cinfo, data, /*num_lines=*/8);
451 jpeg_finish_compress(cinfo);
453 // We're only interested in the header, not the data after it.
454 dest.term_destination();
455 for (size_t i = 0; i < dest.dest.size() - 1; ++i) {
456 if (dest.dest[i] == 0xff && dest.dest[i + 1] == 0xda) { // Start of scan (SOS).
457 unsigned len = dest.dest[i + 2] * 256 + dest.dest[i + 3];
458 dest.dest.resize(i + len + 2);
466 MJPEGEncoder::VAData MJPEGEncoder::get_va_data_for_resolution(unsigned width, unsigned height)
468 pair<unsigned, unsigned> key(width, height);
469 if (va_data_for_resolution.count(key)) {
470 return va_data_for_resolution[key];
473 // Use libjpeg to generate a header and set sane defaults for e.g.
474 // quantization tables. Then do the actual encode with VA-API.
475 jpeg_compress_struct cinfo;
476 vector<uint8_t> jpeg_header = get_jpeg_header(width, height, &cinfo);
478 // Picture parameters.
479 VAEncPictureParameterBufferJPEG pic_param;
480 memset(&pic_param, 0, sizeof(pic_param));
481 pic_param.reconstructed_picture = VA_INVALID_ID;
482 pic_param.picture_width = cinfo.image_width;
483 pic_param.picture_height = cinfo.image_height;
484 for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
485 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
486 pic_param.component_id[component_idx] = comp->component_id;
487 pic_param.quantiser_table_selector[component_idx] = comp->quant_tbl_no;
489 pic_param.num_components = cinfo.num_components;
490 pic_param.num_scan = 1;
491 pic_param.sample_bit_depth = 8;
492 pic_param.coded_buf = VA_INVALID_ID; // To be filled out by caller.
493 pic_param.pic_flags.bits.huffman = 1;
494 pic_param.quality = 50; // Don't scale the given quantization matrices. (See gen8_mfc_jpeg_fqm_state)
496 // Quantization matrices.
497 VAQMatrixBufferJPEG q;
498 memset(&q, 0, sizeof(q));
500 q.load_lum_quantiser_matrix = true;
501 q.load_chroma_quantiser_matrix = true;
502 for (int quant_tbl_idx = 0; quant_tbl_idx < min(4, NUM_QUANT_TBLS); ++quant_tbl_idx) {
503 const JQUANT_TBL *qtbl = cinfo.quant_tbl_ptrs[quant_tbl_idx];
504 assert((qtbl == nullptr) == (quant_tbl_idx >= 2));
505 if (qtbl == nullptr) continue;
507 uint8_t *qmatrix = (quant_tbl_idx == 0) ? q.lum_quantiser_matrix : q.chroma_quantiser_matrix;
508 for (int i = 0; i < 64; ++i) {
509 if (qtbl->quantval[i] > 255) {
510 fprintf(stderr, "Baseline JPEG only!\n");
513 qmatrix[i] = qtbl->quantval[jpeg_natural_order[i]];
517 // Huffman tables (arithmetic is not supported).
518 VAHuffmanTableBufferJPEGBaseline huff;
519 memset(&huff, 0, sizeof(huff));
521 for (int huff_tbl_idx = 0; huff_tbl_idx < min(2, NUM_HUFF_TBLS); ++huff_tbl_idx) {
522 const JHUFF_TBL *ac_hufftbl = cinfo.ac_huff_tbl_ptrs[huff_tbl_idx];
523 const JHUFF_TBL *dc_hufftbl = cinfo.dc_huff_tbl_ptrs[huff_tbl_idx];
524 if (ac_hufftbl == nullptr) {
525 assert(dc_hufftbl == nullptr);
526 huff.load_huffman_table[huff_tbl_idx] = 0;
528 assert(dc_hufftbl != nullptr);
529 huff.load_huffman_table[huff_tbl_idx] = 1;
531 for (int i = 0; i < 16; ++i) {
532 huff.huffman_table[huff_tbl_idx].num_dc_codes[i] = dc_hufftbl->bits[i + 1];
534 for (int i = 0; i < 12; ++i) {
535 huff.huffman_table[huff_tbl_idx].dc_values[i] = dc_hufftbl->huffval[i];
537 for (int i = 0; i < 16; ++i) {
538 huff.huffman_table[huff_tbl_idx].num_ac_codes[i] = ac_hufftbl->bits[i + 1];
540 for (int i = 0; i < 162; ++i) {
541 huff.huffman_table[huff_tbl_idx].ac_values[i] = ac_hufftbl->huffval[i];
546 // Slice parameters (metadata about the slice).
547 VAEncSliceParameterBufferJPEG parms;
548 memset(&parms, 0, sizeof(parms));
549 for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
550 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
551 parms.components[component_idx].component_selector = comp->component_id;
552 parms.components[component_idx].dc_table_selector = comp->dc_tbl_no;
553 parms.components[component_idx].ac_table_selector = comp->ac_tbl_no;
554 if (parms.components[component_idx].dc_table_selector > 1 ||
555 parms.components[component_idx].ac_table_selector > 1) {
556 fprintf(stderr, "Uses too many Huffman tables\n");
560 parms.num_components = cinfo.num_components;
561 parms.restart_interval = cinfo.restart_interval;
563 jpeg_destroy_compress(&cinfo);
566 ret.jpeg_header = move(jpeg_header);
567 ret.pic_param = pic_param;
571 va_data_for_resolution[key] = ret;
575 void MJPEGEncoder::encode_jpeg_va(QueuedFrame &&qf)
577 unsigned width = qf.video_format.width;
578 unsigned height = qf.video_format.height;
580 VAResources resources = get_va_resources(width, height);
581 ReleaseVAResources release(this, resources);
583 VAData va_data = get_va_data_for_resolution(width, height);
584 va_data.pic_param.coded_buf = resources.data_buffer;
586 VABufferID pic_param_buffer;
587 VAStatus va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPictureParameterBufferType, sizeof(va_data.pic_param), 1, &va_data.pic_param, &pic_param_buffer);
588 CHECK_VASTATUS(va_status, "vaCreateBuffer");
589 VABufferDestroyer destroy_pic_param(va_dpy->va_dpy, pic_param_buffer);
592 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAQMatrixBufferType, sizeof(va_data.q), 1, &va_data.q, &q_buffer);
593 CHECK_VASTATUS(va_status, "vaCreateBuffer");
594 VABufferDestroyer destroy_iq(va_dpy->va_dpy, q_buffer);
596 VABufferID huff_buffer;
597 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAHuffmanTableBufferType, sizeof(va_data.huff), 1, &va_data.huff, &huff_buffer);
598 CHECK_VASTATUS(va_status, "vaCreateBuffer");
599 VABufferDestroyer destroy_huff(va_dpy->va_dpy, huff_buffer);
601 VABufferID slice_param_buffer;
602 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncSliceParameterBufferType, sizeof(va_data.parms), 1, &va_data.parms, &slice_param_buffer);
603 CHECK_VASTATUS(va_status, "vaCreateBuffer");
604 VABufferDestroyer destroy_slice_param(va_dpy->va_dpy, slice_param_buffer);
607 va_status = vaDeriveImage(va_dpy->va_dpy, resources.surface, &image);
608 CHECK_VASTATUS(va_status, "vaDeriveImage");
610 // Upload the pixel data.
611 uint8_t *surface_p = nullptr;
612 vaMapBuffer(va_dpy->va_dpy, image.buf, (void **)&surface_p);
614 size_t field_start_line = qf.video_format.extra_lines_top; // No interlacing support.
615 size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
618 const uint8_t *src = qf.frame->data_copy + field_start;
619 uint8_t *dst = (unsigned char *)surface_p + image.offsets[0];
620 memcpy_with_pitch(dst, src, qf.video_format.width * 2, image.pitches[0], qf.video_format.height);
623 va_status = vaUnmapBuffer(va_dpy->va_dpy, image.buf);
624 CHECK_VASTATUS(va_status, "vaUnmapBuffer");
625 va_status = vaDestroyImage(va_dpy->va_dpy, image.image_id);
626 CHECK_VASTATUS(va_status, "vaDestroyImage");
628 // Finally, stick in the JPEG header.
629 VAEncPackedHeaderParameterBuffer header_parm;
630 header_parm.type = VAEncPackedHeaderRawData;
631 header_parm.bit_length = 8 * va_data.jpeg_header.size();
633 VABufferID header_parm_buffer;
634 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderParameterBufferType, sizeof(header_parm), 1, &header_parm, &header_parm_buffer);
635 CHECK_VASTATUS(va_status, "vaCreateBuffer");
636 VABufferDestroyer destroy_header(va_dpy->va_dpy, header_parm_buffer);
638 VABufferID header_data_buffer;
639 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderDataBufferType, va_data.jpeg_header.size(), 1, va_data.jpeg_header.data(), &header_data_buffer);
640 CHECK_VASTATUS(va_status, "vaCreateBuffer");
641 VABufferDestroyer destroy_header_data(va_dpy->va_dpy, header_data_buffer);
643 va_status = vaBeginPicture(va_dpy->va_dpy, resources.context, resources.surface);
644 CHECK_VASTATUS(va_status, "vaBeginPicture");
645 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &pic_param_buffer, 1);
646 CHECK_VASTATUS(va_status, "vaRenderPicture(pic_param)");
647 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &q_buffer, 1);
648 CHECK_VASTATUS(va_status, "vaRenderPicture(q)");
649 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &huff_buffer, 1);
650 CHECK_VASTATUS(va_status, "vaRenderPicture(huff)");
651 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &slice_param_buffer, 1);
652 CHECK_VASTATUS(va_status, "vaRenderPicture(slice_param)");
653 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_parm_buffer, 1);
654 CHECK_VASTATUS(va_status, "vaRenderPicture(header_parm)");
655 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_data_buffer, 1);
656 CHECK_VASTATUS(va_status, "vaRenderPicture(header_data)");
657 va_status = vaEndPicture(va_dpy->va_dpy, resources.context);
658 CHECK_VASTATUS(va_status, "vaEndPicture");
660 qf.resources = move(resources);
661 qf.resource_releaser = move(release);
663 lock_guard<mutex> lock(mu);
664 frames_encoding.push(move(qf));
665 any_frames_encoding.notify_all();
668 void MJPEGEncoder::va_receiver_thread_func()
670 pthread_setname_np(pthread_self(), "MJPEG_Receive");
674 unique_lock<mutex> lock(mu);
675 any_frames_encoding.wait(lock, [this] { return !frames_encoding.empty() || should_quit; });
676 if (should_quit) return;
677 qf = move(frames_encoding.front());
678 frames_encoding.pop();
681 VAStatus va_status = vaSyncSurface(va_dpy->va_dpy, qf.resources.surface);
682 CHECK_VASTATUS(va_status, "vaSyncSurface");
684 VACodedBufferSegment *segment;
685 va_status = vaMapBuffer(va_dpy->va_dpy, qf.resources.data_buffer, (void **)&segment);
686 CHECK_VASTATUS(va_status, "vaMapBuffer");
688 const char *coded_buf = reinterpret_cast<char *>(segment->buf);
689 vector<uint8_t> jpeg(coded_buf, coded_buf + segment->size);
691 va_status = vaUnmapBuffer(va_dpy->va_dpy, qf.resources.data_buffer);
692 CHECK_VASTATUS(va_status, "vaUnmapBuffer");
694 write_mjpeg_packet(qf.pts, qf.card_index, jpeg);
698 vector<uint8_t> MJPEGEncoder::encode_jpeg_libjpeg(const QueuedFrame &qf)
700 unsigned width = qf.video_format.width;
701 unsigned height = qf.video_format.height;
703 VectorDestinationManager dest;
704 jpeg_compress_struct cinfo;
705 init_jpeg_422(width, height, &dest, &cinfo);
707 size_t field_start_line = qf.video_format.extra_lines_top; // No interlacing support.
708 size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
710 JSAMPROW yptr[8], cbptr[8], crptr[8];
711 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
712 for (unsigned y = 0; y < qf.video_format.height; y += 8) {
713 const uint8_t *src = qf.frame->data_copy + field_start + y * qf.video_format.width * 2;
715 memcpy_interleaved(tmp_y, tmp_cbcr, src, qf.video_format.width * 8 * 2);
716 memcpy_interleaved(tmp_cb, tmp_cr, tmp_cbcr, qf.video_format.width * 8);
717 for (unsigned yy = 0; yy < 8; ++yy) {
718 yptr[yy] = tmp_y + yy * width;
719 cbptr[yy] = tmp_cb + yy * width / 2;
720 crptr[yy] = tmp_cr + yy * width / 2;
722 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
724 jpeg_finish_compress(&cinfo);