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 "shared/metrics.h"
20 #include "pbo_frame_allocator.h"
21 #include "shared/timebase.h"
22 #include "va_display_with_cleanup.h"
25 #include <va/va_drm.h>
26 #include <va/va_x11.h>
28 using namespace bmusb;
31 extern void memcpy_with_pitch(uint8_t *dst, const uint8_t *src, size_t src_width, size_t dst_pitch, size_t height);
33 #define CHECK_VASTATUS(va_status, func) \
34 if (va_status != VA_STATUS_SUCCESS) { \
35 fprintf(stderr, "%s:%d (%s) failed with %d\n", __func__, __LINE__, func, va_status); \
39 // From libjpeg (although it's of course identical between implementations).
40 static const int jpeg_natural_order[DCTSIZE2] = {
41 0, 1, 8, 16, 9, 2, 3, 10,
42 17, 24, 32, 25, 18, 11, 4, 5,
43 12, 19, 26, 33, 40, 48, 41, 34,
44 27, 20, 13, 6, 7, 14, 21, 28,
45 35, 42, 49, 56, 57, 50, 43, 36,
46 29, 22, 15, 23, 30, 37, 44, 51,
47 58, 59, 52, 45, 38, 31, 39, 46,
48 53, 60, 61, 54, 47, 55, 62, 63,
51 struct VectorDestinationManager {
52 jpeg_destination_mgr pub;
53 std::vector<uint8_t> dest;
55 VectorDestinationManager()
57 pub.init_destination = init_destination_thunk;
58 pub.empty_output_buffer = empty_output_buffer_thunk;
59 pub.term_destination = term_destination_thunk;
62 static void init_destination_thunk(j_compress_ptr ptr)
64 ((VectorDestinationManager *)(ptr->dest))->init_destination();
67 inline void init_destination()
72 static boolean empty_output_buffer_thunk(j_compress_ptr ptr)
74 return ((VectorDestinationManager *)(ptr->dest))->empty_output_buffer();
77 inline bool empty_output_buffer()
79 make_room(dest.size()); // Should ignore pub.free_in_buffer!
83 inline void make_room(size_t bytes_used)
85 dest.resize(bytes_used + 4096);
86 dest.resize(dest.capacity());
87 pub.next_output_byte = dest.data() + bytes_used;
88 pub.free_in_buffer = dest.size() - bytes_used;
91 static void term_destination_thunk(j_compress_ptr ptr)
93 ((VectorDestinationManager *)(ptr->dest))->term_destination();
96 inline void term_destination()
98 dest.resize(dest.size() - pub.free_in_buffer);
101 static_assert(std::is_standard_layout<VectorDestinationManager>::value, "");
103 int MJPEGEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
105 MJPEGEncoder *engine = (MJPEGEncoder *)opaque;
106 return engine->write_packet2(buf, buf_size, type, time);
109 int MJPEGEncoder::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
111 if (type == AVIO_DATA_MARKER_HEADER) {
112 mux_header.append((char *)buf, buf_size);
113 httpd->set_header(HTTPD::MULTICAM_STREAM, mux_header);
115 httpd->add_data(HTTPD::MULTICAM_STREAM, (char *)buf, buf_size, /*keyframe=*/true, AV_NOPTS_VALUE, AVRational{ AV_TIME_BASE, 1 });
120 MJPEGEncoder::MJPEGEncoder(HTTPD *httpd, const string &va_display)
123 // Set up the mux. We don't use the Mux wrapper, because it's geared towards
124 // a situation with only one video stream (and possibly one audio stream)
125 // with known width/height, and we don't need the extra functionality it provides.
126 avctx.reset(avformat_alloc_context());
127 avctx->oformat = av_guess_format("mp4", nullptr, nullptr);
129 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
130 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
131 avctx->pb->write_data_type = &MJPEGEncoder::write_packet2_thunk;
132 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
134 for (unsigned card_idx = 0; card_idx < global_flags.card_to_mjpeg_stream_export.size(); ++card_idx) {
135 AVStream *stream = avformat_new_stream(avctx.get(), nullptr);
136 if (stream == nullptr) {
137 fprintf(stderr, "avformat_new_stream() failed\n");
140 stream->time_base = AVRational{ 1, TIMEBASE };
141 stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
142 stream->codecpar->codec_id = AV_CODEC_ID_MJPEG;
144 // Used for aspect ratio only. Can change without notice (the mux won't care).
145 stream->codecpar->width = global_flags.width;
146 stream->codecpar->height = global_flags.height;
148 // TODO: We could perhaps use the interpretation for each card here
149 // (or at least the command-line flags) instead of the defaults,
150 // but what would we do when they change?
151 stream->codecpar->color_primaries = AVCOL_PRI_BT709;
152 stream->codecpar->color_trc = AVCOL_TRC_IEC61966_2_1;
153 stream->codecpar->color_space = AVCOL_SPC_BT709;
154 stream->codecpar->color_range = AVCOL_RANGE_MPEG;
155 stream->codecpar->chroma_location = AVCHROMA_LOC_LEFT;
156 stream->codecpar->field_order = AV_FIELD_PROGRESSIVE;
159 AVDictionary *options = NULL;
160 vector<pair<string, string>> opts = MUX_OPTS;
161 for (pair<string, string> opt : opts) {
162 av_dict_set(&options, opt.first.c_str(), opt.second.c_str(), 0);
164 if (avformat_write_header(avctx.get(), &options) < 0) {
165 fprintf(stderr, "avformat_write_header() failed\n");
169 // Initialize VA-API.
171 va_dpy = try_open_va(va_display, &error, &config_id);
172 if (va_dpy == nullptr) {
173 fprintf(stderr, "Could not initialize VA-API for MJPEG encoding: %s. JPEGs will be encoded in software if needed.\n", error.c_str());
176 encoder_thread = thread(&MJPEGEncoder::encoder_thread_func, this);
177 if (va_dpy != nullptr) {
178 va_receiver_thread = thread(&MJPEGEncoder::va_receiver_thread_func, this);
181 global_metrics.add("mjpeg_frames", {{ "status", "dropped" }, { "reason", "zero_size" }}, &metric_mjpeg_frames_zero_size_dropped);
182 global_metrics.add("mjpeg_frames", {{ "status", "dropped" }, { "reason", "interlaced" }}, &metric_mjpeg_frames_interlaced_dropped);
183 global_metrics.add("mjpeg_frames", {{ "status", "dropped" }, { "reason", "unsupported_pixel_format" }}, &metric_mjpeg_frames_unsupported_pixel_format_dropped);
184 global_metrics.add("mjpeg_frames", {{ "status", "dropped" }, { "reason", "oversized" }}, &metric_mjpeg_frames_oversized_dropped);
185 global_metrics.add("mjpeg_frames", {{ "status", "dropped" }, { "reason", "overrun" }}, &metric_mjpeg_overrun_dropped);
186 global_metrics.add("mjpeg_frames", {{ "status", "submitted" }}, &metric_mjpeg_overrun_submitted);
191 MJPEGEncoder::~MJPEGEncoder()
193 av_free(avctx->pb->buffer);
195 global_metrics.remove("mjpeg_frames", {{ "status", "dropped" }, { "reason", "zero_size" }});
196 global_metrics.remove("mjpeg_frames", {{ "status", "dropped" }, { "reason", "interlaced" }});
197 global_metrics.remove("mjpeg_frames", {{ "status", "dropped" }, { "reason", "unsupported_pixel_format" }});
198 global_metrics.remove("mjpeg_frames", {{ "status", "dropped" }, { "reason", "oversized" }});
199 global_metrics.remove("mjpeg_frames", {{ "status", "dropped" }, { "reason", "overrun" }});
200 global_metrics.remove("mjpeg_frames", {{ "status", "submitted" }});
203 void MJPEGEncoder::stop()
210 any_frames_to_be_encoded.notify_all();
211 encoder_thread.join();
212 if (va_dpy != nullptr) {
213 va_receiver_thread.join();
217 unique_ptr<VADisplayWithCleanup> MJPEGEncoder::try_open_va(const string &va_display, string *error, VAConfigID *config_id)
219 unique_ptr<VADisplayWithCleanup> va_dpy = va_open_display(va_display);
220 if (va_dpy == nullptr) {
221 if (error) *error = "Opening VA display failed";
224 int major_ver, minor_ver;
225 VAStatus va_status = vaInitialize(va_dpy->va_dpy, &major_ver, &minor_ver);
226 if (va_status != VA_STATUS_SUCCESS) {
228 snprintf(buf, sizeof(buf), "vaInitialize() failed with status %d\n", va_status);
229 if (error != nullptr) *error = buf;
233 VAConfigAttrib attr = { VAConfigAttribRTFormat, VA_RT_FORMAT_YUV422 };
234 va_status = vaCreateConfig(va_dpy->va_dpy, VAProfileJPEGBaseline, VAEntrypointEncPicture,
235 &attr, 1, config_id);
236 if (va_status == VA_STATUS_ERROR_UNSUPPORTED_ENTRYPOINT) {
237 if (error != nullptr) *error = "No hardware support";
239 } else if (va_status != VA_STATUS_SUCCESS) {
241 snprintf(buf, sizeof(buf), "vaCreateConfig() failed with status %d\n", va_status);
242 if (error != nullptr) *error = buf;
246 int num_formats = vaMaxNumImageFormats(va_dpy->va_dpy);
247 assert(num_formats > 0);
249 unique_ptr<VAImageFormat[]> formats(new VAImageFormat[num_formats]);
250 va_status = vaQueryImageFormats(va_dpy->va_dpy, formats.get(), &num_formats);
251 if (va_status != VA_STATUS_SUCCESS) {
253 snprintf(buf, sizeof(buf), "vaQueryImageFormats() failed with status %d\n", va_status);
254 if (error != nullptr) *error = buf;
261 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)
263 PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)frame->userdata;
264 if (video_format.width == 0 || video_format.height == 0) {
265 ++metric_mjpeg_frames_zero_size_dropped;
268 if (video_format.interlaced) {
269 fprintf(stderr, "Card %u: Ignoring JPEG encoding for interlaced frame\n", card_index);
270 ++metric_mjpeg_frames_interlaced_dropped;
273 if (userdata->pixel_format != PixelFormat_8BitYCbCr ||
274 !frame->interleaved) {
275 fprintf(stderr, "Card %u: Ignoring JPEG encoding for unsupported pixel format\n", card_index);
276 ++metric_mjpeg_frames_unsupported_pixel_format_dropped;
279 if (video_format.width > 4096 || video_format.height > 4096) {
280 fprintf(stderr, "Card %u: Ignoring JPEG encoding for oversized frame\n", card_index);
281 ++metric_mjpeg_frames_oversized_dropped;
285 lock_guard<mutex> lock(mu);
286 if (frames_to_be_encoded.size() + frames_encoding.size() > 50) {
287 fprintf(stderr, "WARNING: MJPEG encoding doesn't keep up, discarding frame.\n");
288 ++metric_mjpeg_overrun_dropped;
291 ++metric_mjpeg_overrun_submitted;
292 frames_to_be_encoded.push(QueuedFrame{ pts, card_index, frame, video_format, y_offset, cbcr_offset });
293 any_frames_to_be_encoded.notify_all();
296 void MJPEGEncoder::encoder_thread_func()
298 pthread_setname_np(pthread_self(), "MJPEG_Encode");
299 posix_memalign((void **)&tmp_y, 4096, 4096 * 8);
300 posix_memalign((void **)&tmp_cbcr, 4096, 4096 * 8);
301 posix_memalign((void **)&tmp_cb, 4096, 4096 * 8);
302 posix_memalign((void **)&tmp_cr, 4096, 4096 * 8);
307 unique_lock<mutex> lock(mu);
308 any_frames_to_be_encoded.wait(lock, [this] { return !frames_to_be_encoded.empty() || should_quit; });
309 if (should_quit) break;
310 qf = move(frames_to_be_encoded.front());
311 frames_to_be_encoded.pop();
314 if (va_dpy != nullptr) {
315 // Will call back in the receiver thread.
316 encode_jpeg_va(move(qf));
318 // Encode synchronously, in the same thread.
319 vector<uint8_t> jpeg = encode_jpeg_libjpeg(qf);
320 write_mjpeg_packet(qf.pts, qf.card_index, jpeg);
330 void MJPEGEncoder::write_mjpeg_packet(int64_t pts, unsigned card_index, const vector<uint8_t> &jpeg)
333 memset(&pkt, 0, sizeof(pkt));
335 pkt.data = const_cast<uint8_t *>(&jpeg[0]);
336 pkt.size = jpeg.size();
337 pkt.stream_index = card_index;
338 pkt.flags = AV_PKT_FLAG_KEY;
339 AVRational time_base = avctx->streams[pkt.stream_index]->time_base;
340 pkt.pts = pkt.dts = av_rescale_q(pts, AVRational{ 1, TIMEBASE }, time_base);
342 if (av_write_frame(avctx.get(), &pkt) < 0) {
343 fprintf(stderr, "av_write_frame() failed\n");
348 class VABufferDestroyer {
350 VABufferDestroyer(VADisplay dpy, VABufferID buf)
351 : dpy(dpy), buf(buf) {}
353 ~VABufferDestroyer() {
354 VAStatus va_status = vaDestroyBuffer(dpy, buf);
355 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
363 MJPEGEncoder::VAResources MJPEGEncoder::get_va_resources(unsigned width, unsigned height)
366 lock_guard<mutex> lock(va_resources_mutex);
367 for (auto it = va_resources_freelist.begin(); it != va_resources_freelist.end(); ++it) {
368 if (it->width == width && it->height == height) {
369 VAResources ret = *it;
370 va_resources_freelist.erase(it);
381 VASurfaceAttrib attrib;
382 attrib.flags = VA_SURFACE_ATTRIB_SETTABLE;
383 attrib.type = VASurfaceAttribPixelFormat;
384 attrib.value.type = VAGenericValueTypeInteger;
385 attrib.value.value.i = VA_FOURCC_UYVY;
387 VAStatus va_status = vaCreateSurfaces(va_dpy->va_dpy, VA_RT_FORMAT_YUV422,
389 &ret.surface, 1, &attrib, 1);
390 CHECK_VASTATUS(va_status, "vaCreateSurfaces");
392 va_status = vaCreateContext(va_dpy->va_dpy, config_id, width, height, 0, &ret.surface, 1, &ret.context);
393 CHECK_VASTATUS(va_status, "vaCreateContext");
395 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncCodedBufferType, width * height * 3 + 8192, 1, nullptr, &ret.data_buffer);
396 CHECK_VASTATUS(va_status, "vaCreateBuffer");
401 void MJPEGEncoder::release_va_resources(MJPEGEncoder::VAResources resources)
403 lock_guard<mutex> lock(va_resources_mutex);
404 if (va_resources_freelist.size() > 10) {
405 auto it = va_resources_freelist.end();
408 VAStatus va_status = vaDestroyBuffer(va_dpy->va_dpy, it->data_buffer);
409 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
411 va_status = vaDestroyContext(va_dpy->va_dpy, it->context);
412 CHECK_VASTATUS(va_status, "vaDestroyContext");
414 va_status = vaDestroySurfaces(va_dpy->va_dpy, &it->surface, 1);
415 CHECK_VASTATUS(va_status, "vaDestroySurfaces");
417 va_resources_freelist.erase(it);
420 va_resources_freelist.push_front(resources);
423 void MJPEGEncoder::init_jpeg_422(unsigned width, unsigned height, VectorDestinationManager *dest, jpeg_compress_struct *cinfo)
426 cinfo->err = jpeg_std_error(&jerr);
427 jpeg_create_compress(cinfo);
429 cinfo->dest = (jpeg_destination_mgr *)dest;
431 cinfo->input_components = 3;
432 jpeg_set_defaults(cinfo);
433 jpeg_set_quality(cinfo, quality, /*force_baseline=*/false);
435 cinfo->image_width = width;
436 cinfo->image_height = height;
437 cinfo->raw_data_in = true;
438 jpeg_set_colorspace(cinfo, JCS_YCbCr);
439 cinfo->comp_info[0].h_samp_factor = 2;
440 cinfo->comp_info[0].v_samp_factor = 1;
441 cinfo->comp_info[1].h_samp_factor = 1;
442 cinfo->comp_info[1].v_samp_factor = 1;
443 cinfo->comp_info[2].h_samp_factor = 1;
444 cinfo->comp_info[2].v_samp_factor = 1;
445 cinfo->CCIR601_sampling = true; // Seems to be mostly ignored by libjpeg, though.
446 jpeg_start_compress(cinfo, true);
448 // This comment marker is private to FFmpeg. It signals limited Y'CbCr range
449 // (and nothing else).
450 jpeg_write_marker(cinfo, JPEG_COM, (const JOCTET *)"CS=ITU601", strlen("CS=ITU601"));
453 vector<uint8_t> MJPEGEncoder::get_jpeg_header(unsigned width, unsigned height, jpeg_compress_struct *cinfo)
455 VectorDestinationManager dest;
456 init_jpeg_422(width, height, &dest, cinfo);
458 // Make a dummy black image; there's seemingly no other easy way of
459 // making libjpeg outputting all of its headers.
460 JSAMPROW yptr[8], cbptr[8], crptr[8];
461 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
462 memset(tmp_y, 0, 4096);
463 memset(tmp_cb, 0, 4096);
464 memset(tmp_cr, 0, 4096);
465 for (unsigned yy = 0; yy < 8; ++yy) {
470 for (unsigned y = 0; y < height; y += 8) {
471 jpeg_write_raw_data(cinfo, data, /*num_lines=*/8);
473 jpeg_finish_compress(cinfo);
475 // We're only interested in the header, not the data after it.
476 dest.term_destination();
477 for (size_t i = 0; i < dest.dest.size() - 1; ++i) {
478 if (dest.dest[i] == 0xff && dest.dest[i + 1] == 0xda) { // Start of scan (SOS).
479 unsigned len = dest.dest[i + 2] * 256 + dest.dest[i + 3];
480 dest.dest.resize(i + len + 2);
488 MJPEGEncoder::VAData MJPEGEncoder::get_va_data_for_resolution(unsigned width, unsigned height)
490 pair<unsigned, unsigned> key(width, height);
491 if (va_data_for_resolution.count(key)) {
492 return va_data_for_resolution[key];
495 // Use libjpeg to generate a header and set sane defaults for e.g.
496 // quantization tables. Then do the actual encode with VA-API.
497 jpeg_compress_struct cinfo;
498 vector<uint8_t> jpeg_header = get_jpeg_header(width, height, &cinfo);
500 // Picture parameters.
501 VAEncPictureParameterBufferJPEG pic_param;
502 memset(&pic_param, 0, sizeof(pic_param));
503 pic_param.reconstructed_picture = VA_INVALID_ID;
504 pic_param.picture_width = cinfo.image_width;
505 pic_param.picture_height = cinfo.image_height;
506 for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
507 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
508 pic_param.component_id[component_idx] = comp->component_id;
509 pic_param.quantiser_table_selector[component_idx] = comp->quant_tbl_no;
511 pic_param.num_components = cinfo.num_components;
512 pic_param.num_scan = 1;
513 pic_param.sample_bit_depth = 8;
514 pic_param.coded_buf = VA_INVALID_ID; // To be filled out by caller.
515 pic_param.pic_flags.bits.huffman = 1;
516 pic_param.quality = 50; // Don't scale the given quantization matrices. (See gen8_mfc_jpeg_fqm_state)
518 // Quantization matrices.
519 VAQMatrixBufferJPEG q;
520 memset(&q, 0, sizeof(q));
522 q.load_lum_quantiser_matrix = true;
523 q.load_chroma_quantiser_matrix = true;
524 for (int quant_tbl_idx = 0; quant_tbl_idx < min(4, NUM_QUANT_TBLS); ++quant_tbl_idx) {
525 const JQUANT_TBL *qtbl = cinfo.quant_tbl_ptrs[quant_tbl_idx];
526 assert((qtbl == nullptr) == (quant_tbl_idx >= 2));
527 if (qtbl == nullptr) continue;
529 uint8_t *qmatrix = (quant_tbl_idx == 0) ? q.lum_quantiser_matrix : q.chroma_quantiser_matrix;
530 for (int i = 0; i < 64; ++i) {
531 if (qtbl->quantval[i] > 255) {
532 fprintf(stderr, "Baseline JPEG only!\n");
535 qmatrix[i] = qtbl->quantval[jpeg_natural_order[i]];
539 // Huffman tables (arithmetic is not supported).
540 VAHuffmanTableBufferJPEGBaseline huff;
541 memset(&huff, 0, sizeof(huff));
543 for (int huff_tbl_idx = 0; huff_tbl_idx < min(2, NUM_HUFF_TBLS); ++huff_tbl_idx) {
544 const JHUFF_TBL *ac_hufftbl = cinfo.ac_huff_tbl_ptrs[huff_tbl_idx];
545 const JHUFF_TBL *dc_hufftbl = cinfo.dc_huff_tbl_ptrs[huff_tbl_idx];
546 if (ac_hufftbl == nullptr) {
547 assert(dc_hufftbl == nullptr);
548 huff.load_huffman_table[huff_tbl_idx] = 0;
550 assert(dc_hufftbl != nullptr);
551 huff.load_huffman_table[huff_tbl_idx] = 1;
553 for (int i = 0; i < 16; ++i) {
554 huff.huffman_table[huff_tbl_idx].num_dc_codes[i] = dc_hufftbl->bits[i + 1];
556 for (int i = 0; i < 12; ++i) {
557 huff.huffman_table[huff_tbl_idx].dc_values[i] = dc_hufftbl->huffval[i];
559 for (int i = 0; i < 16; ++i) {
560 huff.huffman_table[huff_tbl_idx].num_ac_codes[i] = ac_hufftbl->bits[i + 1];
562 for (int i = 0; i < 162; ++i) {
563 huff.huffman_table[huff_tbl_idx].ac_values[i] = ac_hufftbl->huffval[i];
568 // Slice parameters (metadata about the slice).
569 VAEncSliceParameterBufferJPEG parms;
570 memset(&parms, 0, sizeof(parms));
571 for (int component_idx = 0; component_idx < cinfo.num_components; ++component_idx) {
572 const jpeg_component_info *comp = &cinfo.comp_info[component_idx];
573 parms.components[component_idx].component_selector = comp->component_id;
574 parms.components[component_idx].dc_table_selector = comp->dc_tbl_no;
575 parms.components[component_idx].ac_table_selector = comp->ac_tbl_no;
576 if (parms.components[component_idx].dc_table_selector > 1 ||
577 parms.components[component_idx].ac_table_selector > 1) {
578 fprintf(stderr, "Uses too many Huffman tables\n");
582 parms.num_components = cinfo.num_components;
583 parms.restart_interval = cinfo.restart_interval;
585 jpeg_destroy_compress(&cinfo);
588 ret.jpeg_header = move(jpeg_header);
589 ret.pic_param = pic_param;
593 va_data_for_resolution[key] = ret;
597 void MJPEGEncoder::encode_jpeg_va(QueuedFrame &&qf)
599 unsigned width = qf.video_format.width;
600 unsigned height = qf.video_format.height;
602 VAResources resources = get_va_resources(width, height);
603 ReleaseVAResources release(this, resources);
605 VAData va_data = get_va_data_for_resolution(width, height);
606 va_data.pic_param.coded_buf = resources.data_buffer;
608 VABufferID pic_param_buffer;
609 VAStatus va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPictureParameterBufferType, sizeof(va_data.pic_param), 1, &va_data.pic_param, &pic_param_buffer);
610 CHECK_VASTATUS(va_status, "vaCreateBuffer");
611 VABufferDestroyer destroy_pic_param(va_dpy->va_dpy, pic_param_buffer);
614 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAQMatrixBufferType, sizeof(va_data.q), 1, &va_data.q, &q_buffer);
615 CHECK_VASTATUS(va_status, "vaCreateBuffer");
616 VABufferDestroyer destroy_iq(va_dpy->va_dpy, q_buffer);
618 VABufferID huff_buffer;
619 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAHuffmanTableBufferType, sizeof(va_data.huff), 1, &va_data.huff, &huff_buffer);
620 CHECK_VASTATUS(va_status, "vaCreateBuffer");
621 VABufferDestroyer destroy_huff(va_dpy->va_dpy, huff_buffer);
623 VABufferID slice_param_buffer;
624 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncSliceParameterBufferType, sizeof(va_data.parms), 1, &va_data.parms, &slice_param_buffer);
625 CHECK_VASTATUS(va_status, "vaCreateBuffer");
626 VABufferDestroyer destroy_slice_param(va_dpy->va_dpy, slice_param_buffer);
629 va_status = vaDeriveImage(va_dpy->va_dpy, resources.surface, &image);
630 CHECK_VASTATUS(va_status, "vaDeriveImage");
632 // Upload the pixel data.
633 uint8_t *surface_p = nullptr;
634 vaMapBuffer(va_dpy->va_dpy, image.buf, (void **)&surface_p);
636 size_t field_start_line = qf.video_format.extra_lines_top; // No interlacing support.
637 size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
640 const uint8_t *src = qf.frame->data_copy + field_start;
641 uint8_t *dst = (unsigned char *)surface_p + image.offsets[0];
642 memcpy_with_pitch(dst, src, qf.video_format.width * 2, image.pitches[0], qf.video_format.height);
645 va_status = vaUnmapBuffer(va_dpy->va_dpy, image.buf);
646 CHECK_VASTATUS(va_status, "vaUnmapBuffer");
647 va_status = vaDestroyImage(va_dpy->va_dpy, image.image_id);
648 CHECK_VASTATUS(va_status, "vaDestroyImage");
650 // Finally, stick in the JPEG header.
651 VAEncPackedHeaderParameterBuffer header_parm;
652 header_parm.type = VAEncPackedHeaderRawData;
653 header_parm.bit_length = 8 * va_data.jpeg_header.size();
655 VABufferID header_parm_buffer;
656 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderParameterBufferType, sizeof(header_parm), 1, &header_parm, &header_parm_buffer);
657 CHECK_VASTATUS(va_status, "vaCreateBuffer");
658 VABufferDestroyer destroy_header(va_dpy->va_dpy, header_parm_buffer);
660 VABufferID header_data_buffer;
661 va_status = vaCreateBuffer(va_dpy->va_dpy, config_id, VAEncPackedHeaderDataBufferType, va_data.jpeg_header.size(), 1, va_data.jpeg_header.data(), &header_data_buffer);
662 CHECK_VASTATUS(va_status, "vaCreateBuffer");
663 VABufferDestroyer destroy_header_data(va_dpy->va_dpy, header_data_buffer);
665 va_status = vaBeginPicture(va_dpy->va_dpy, resources.context, resources.surface);
666 CHECK_VASTATUS(va_status, "vaBeginPicture");
667 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &pic_param_buffer, 1);
668 CHECK_VASTATUS(va_status, "vaRenderPicture(pic_param)");
669 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &q_buffer, 1);
670 CHECK_VASTATUS(va_status, "vaRenderPicture(q)");
671 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &huff_buffer, 1);
672 CHECK_VASTATUS(va_status, "vaRenderPicture(huff)");
673 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &slice_param_buffer, 1);
674 CHECK_VASTATUS(va_status, "vaRenderPicture(slice_param)");
675 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_parm_buffer, 1);
676 CHECK_VASTATUS(va_status, "vaRenderPicture(header_parm)");
677 va_status = vaRenderPicture(va_dpy->va_dpy, resources.context, &header_data_buffer, 1);
678 CHECK_VASTATUS(va_status, "vaRenderPicture(header_data)");
679 va_status = vaEndPicture(va_dpy->va_dpy, resources.context);
680 CHECK_VASTATUS(va_status, "vaEndPicture");
682 qf.resources = move(resources);
683 qf.resource_releaser = move(release);
685 lock_guard<mutex> lock(mu);
686 frames_encoding.push(move(qf));
687 any_frames_encoding.notify_all();
690 void MJPEGEncoder::va_receiver_thread_func()
692 pthread_setname_np(pthread_self(), "MJPEG_Receive");
696 unique_lock<mutex> lock(mu);
697 any_frames_encoding.wait(lock, [this] { return !frames_encoding.empty() || should_quit; });
698 if (should_quit) return;
699 qf = move(frames_encoding.front());
700 frames_encoding.pop();
703 VAStatus va_status = vaSyncSurface(va_dpy->va_dpy, qf.resources.surface);
704 CHECK_VASTATUS(va_status, "vaSyncSurface");
706 VACodedBufferSegment *segment;
707 va_status = vaMapBuffer(va_dpy->va_dpy, qf.resources.data_buffer, (void **)&segment);
708 CHECK_VASTATUS(va_status, "vaMapBuffer");
710 const char *coded_buf = reinterpret_cast<char *>(segment->buf);
711 vector<uint8_t> jpeg(coded_buf, coded_buf + segment->size);
713 va_status = vaUnmapBuffer(va_dpy->va_dpy, qf.resources.data_buffer);
714 CHECK_VASTATUS(va_status, "vaUnmapBuffer");
716 write_mjpeg_packet(qf.pts, qf.card_index, jpeg);
720 vector<uint8_t> MJPEGEncoder::encode_jpeg_libjpeg(const QueuedFrame &qf)
722 unsigned width = qf.video_format.width;
723 unsigned height = qf.video_format.height;
725 VectorDestinationManager dest;
726 jpeg_compress_struct cinfo;
727 init_jpeg_422(width, height, &dest, &cinfo);
729 size_t field_start_line = qf.video_format.extra_lines_top; // No interlacing support.
730 size_t field_start = qf.cbcr_offset * 2 + qf.video_format.width * field_start_line * 2;
732 JSAMPROW yptr[8], cbptr[8], crptr[8];
733 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
734 for (unsigned y = 0; y < qf.video_format.height; y += 8) {
735 const uint8_t *src = qf.frame->data_copy + field_start + y * qf.video_format.width * 2;
737 memcpy_interleaved(tmp_y, tmp_cbcr, src, qf.video_format.width * 8 * 2);
738 memcpy_interleaved(tmp_cb, tmp_cr, tmp_cbcr, qf.video_format.width * 8);
739 for (unsigned yy = 0; yy < 8; ++yy) {
740 yptr[yy] = tmp_y + yy * width;
741 cbptr[yy] = tmp_cb + yy * width / 2;
742 crptr[yy] = tmp_cr + yy * width / 2;
744 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
746 jpeg_finish_compress(&cinfo);