1 // Intensity Shuttle USB3 prototype capture driver, v0.3
2 // Can download 8-bit and 10-bit UYVY/v210 frames from HDMI, quite stable
3 // (can do captures for hours at a time with no drops), except during startup
4 // 576p60/720p60/1080i60 works, 1080p60 does not work (firmware limitation)
5 // Audio comes out as 8-channel 24-bit raw audio.
10 #include <arpa/inet.h>
17 #include <immintrin.h>
25 #include <condition_variable>
32 using namespace std::placeholders;
35 #define HEIGHT 750 /* 30 lines ancillary data? */
37 //#define HEIGHT 1125 /* ??? lines ancillary data? */
38 #define HEADER_SIZE 44
39 //#define HEADER_SIZE 0
40 #define AUDIO_HEADER_SIZE 4
42 //#define FRAME_SIZE (WIDTH * HEIGHT * 2 + HEADER_SIZE) // UYVY
43 //#define FRAME_SIZE (WIDTH * HEIGHT * 2 * 4 / 3 + HEADER_SIZE) // v210
44 #define FRAME_SIZE (8 << 20)
48 FrameAllocator::~FrameAllocator() {}
50 #define NUM_QUEUED_FRAMES 8
51 class MallocFrameAllocator : public FrameAllocator {
53 MallocFrameAllocator(size_t frame_size);
54 Frame alloc_frame() override;
55 void release_frame(Frame frame) override;
61 stack<unique_ptr<uint8_t[]>> freelist; // All of size <frame_size>.
64 MallocFrameAllocator::MallocFrameAllocator(size_t frame_size)
65 : frame_size(frame_size)
67 for (int i = 0; i < NUM_QUEUED_FRAMES; ++i) {
68 freelist.push(unique_ptr<uint8_t[]>(new uint8_t[frame_size]));
72 FrameAllocator::Frame MallocFrameAllocator::alloc_frame()
77 unique_lock<mutex> lock(freelist_mutex); // Meh.
78 if (freelist.empty()) {
79 printf("Frame overrun (no more spare frames of size %ld), dropping frame!\n",
82 vf.data = freelist.top().release();
84 freelist.pop(); // Meh.
89 void MallocFrameAllocator::release_frame(Frame frame)
91 unique_lock<mutex> lock(freelist_mutex);
92 freelist.push(unique_ptr<uint8_t[]>(frame.data));
95 bool uint16_less_than_with_wraparound(uint16_t a, uint16_t b)
100 return (b - a < 0x8000);
102 int wrap_b = 0x10000 + int(b);
103 return (wrap_b - a < 0x8000);
107 void BMUSBCapture::queue_frame(uint16_t format, uint16_t timecode, FrameAllocator::Frame frame, deque<QueuedFrame> *q)
109 if (!q->empty() && !uint16_less_than_with_wraparound(q->back().timecode, timecode)) {
110 printf("Blocks going backwards: prev=0x%04x, cur=0x%04x (dropped)\n",
111 q->back().timecode, timecode);
112 frame.owner->release_frame(frame);
118 qf.timecode = timecode;
122 unique_lock<mutex> lock(queue_lock);
123 q->push_back(move(qf));
125 queues_not_empty.notify_one(); // might be spurious
128 void dump_frame(const char *filename, uint8_t *frame_start, size_t frame_len)
130 FILE *fp = fopen(filename, "wb");
131 if (fwrite(frame_start + HEADER_SIZE, frame_len - HEADER_SIZE, 1, fp) != 1) {
132 printf("short write!\n");
137 void dump_audio_block(uint8_t *audio_start, size_t audio_len)
139 fwrite(audio_start + AUDIO_HEADER_SIZE, 1, audio_len - AUDIO_HEADER_SIZE, audiofp);
142 void BMUSBCapture::dequeue_thread()
145 unique_lock<mutex> lock(queue_lock);
146 queues_not_empty.wait(lock, [this]{ return !pending_video_frames.empty() && !pending_audio_frames.empty(); });
148 uint16_t video_timecode = pending_video_frames.front().timecode;
149 uint16_t audio_timecode = pending_audio_frames.front().timecode;
150 if (video_timecode < audio_timecode) {
151 printf("Video block 0x%04x without corresponding audio block, dropping.\n",
153 video_frame_allocator->release_frame(pending_video_frames.front().frame);
154 pending_video_frames.pop_front();
155 } else if (audio_timecode < video_timecode) {
156 printf("Audio block 0x%04x without corresponding video block, dropping.\n",
158 audio_frame_allocator->release_frame(pending_audio_frames.front().frame);
159 pending_audio_frames.pop_front();
161 QueuedFrame video_frame = pending_video_frames.front();
162 QueuedFrame audio_frame = pending_audio_frames.front();
163 pending_audio_frames.pop_front();
164 pending_video_frames.pop_front();
169 snprintf(filename, sizeof(filename), "%04x%04x.uyvy", video_frame.format, video_timecode);
170 dump_frame(filename, video_frame.frame.data, video_frame.data_len);
171 dump_audio_block(audio_frame.frame.data, audio_frame.data_len);
174 frame_callback(video_timecode,
175 video_frame.frame, HEADER_SIZE, video_frame.format,
176 audio_frame.frame, AUDIO_HEADER_SIZE, audio_frame.format);
181 void BMUSBCapture::start_new_frame(const uint8_t *start)
183 uint16_t format = (start[3] << 8) | start[2];
184 uint16_t timecode = (start[1] << 8) | start[0];
186 if (current_video_frame.len > 0) {
188 queue_frame(format, timecode, current_video_frame, &pending_video_frames);
190 //printf("Found frame start, format 0x%04x timecode 0x%04x, previous frame length was %d/%d\n",
192 // //start[7], start[6], start[5], start[4],
193 // read_current_frame, FRAME_SIZE);
195 current_video_frame = video_frame_allocator->alloc_frame();
196 //if (current_video_frame.data == nullptr) {
197 // read_current_frame = -1;
199 // read_current_frame = 0;
203 void BMUSBCapture::start_new_audio_block(const uint8_t *start)
205 uint16_t format = (start[3] << 8) | start[2];
206 uint16_t timecode = (start[1] << 8) | start[0];
207 if (current_audio_frame.len > 0) {
208 //dump_audio_block();
209 queue_frame(format, timecode, current_audio_frame, &pending_audio_frames);
211 //printf("Found audio block start, format 0x%04x timecode 0x%04x, previous block length was %d\n",
212 // format, timecode, read_current_audio_block);
213 current_audio_frame = audio_frame_allocator->alloc_frame();
217 static void dump_pack(const libusb_transfer *xfr, int offset, const libusb_iso_packet_descriptor *pack)
219 // printf("ISO pack%u length:%u, actual_length:%u, offset:%u\n", i, pack->length, pack->actual_length, offset);
220 for (unsigned j = 0; j < pack->actual_length; j++) {
221 //for (int j = 0; j < min(pack->actual_length, 16u); j++) {
222 printf("%02x", xfr->buffer[j + offset]);
225 else if ((j % 8) == 7)
233 void memcpy_interleaved(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
236 uint8_t *dptr1 = dest1;
237 uint8_t *dptr2 = dest2;
239 for (size_t i = 0; i < n; i += 2) {
245 void add_to_frame(FrameAllocator::Frame *current_frame, const char *frame_type_name, const uint8_t *start, const uint8_t *end)
247 if (current_frame->data == nullptr ||
248 current_frame->len > current_frame->size ||
253 int bytes = end - start;
254 if (current_frame->len + bytes > current_frame->size) {
255 printf("%d bytes overflow after last %s frame\n",
256 int(current_frame->len + bytes - current_frame->size), frame_type_name);
259 if (current_frame->interleaved) {
260 uint8_t *data = current_frame->data + current_frame->len / 2;
261 uint8_t *data2 = current_frame->data2 + current_frame->len / 2;
262 if (current_frame->len % 2 == 1) {
266 if (bytes % 2 == 1) {
269 ++current_frame->len;
272 memcpy_interleaved(data, data2, start, bytes);
273 current_frame->len += bytes;
275 memcpy(current_frame->data + current_frame->len, start, bytes);
276 current_frame->len += bytes;
283 // Does a memcpy and memchr in one to reduce processing time.
284 // Note that the benefit is somewhat limited if your L3 cache is small,
285 // as you'll (unfortunately) spend most of the time loading the data
288 // Complicated cases are left to the slow path; it basically stops copying
289 // up until the first instance of "sync_char" (usually a bit before, actually).
290 // This is fine, since 0x00 bytes shouldn't really show up in normal picture
291 // data, and what we really need this for is the 00 00 ff ff marker in video data.
292 const uint8_t *add_to_frame_fastpath(FrameAllocator::Frame *current_frame, const uint8_t *start, const uint8_t *limit, const char sync_char)
294 if (current_frame->data == nullptr ||
295 current_frame->len > current_frame->size ||
299 size_t orig_bytes = limit - start;
300 if (orig_bytes < 128) {
305 // Don't read more bytes than we can write.
306 limit = min(limit, start + (current_frame->size - current_frame->len));
308 // Align end to 32 bytes.
309 limit = (const uint8_t *)(intptr_t(limit) & ~31);
311 if (start >= limit) {
315 // Process [0,31] bytes, such that start gets aligned to 32 bytes.
316 const uint8_t *aligned_start = (const uint8_t *)(intptr_t(start + 31) & ~31);
317 if (aligned_start != start) {
318 const uint8_t *sync_start = (const uint8_t *)memchr(start, sync_char, aligned_start - start);
319 if (sync_start == nullptr) {
320 add_to_frame(current_frame, "", start, aligned_start);
322 add_to_frame(current_frame, "", start, sync_start);
327 // Make the length a multiple of 64.
328 if (current_frame->interleaved) {
329 if (((limit - aligned_start) % 64) != 0) {
332 assert(((limit - aligned_start) % 64) == 0);
336 const __m256i needle = _mm256_set1_epi8(sync_char);
338 const __m256i *in = (const __m256i *)aligned_start;
339 if (current_frame->interleaved) {
340 __m256i *out1 = (__m256i *)(current_frame->data + (current_frame->len + 1) / 2);
341 __m256i *out2 = (__m256i *)(current_frame->data2 + current_frame->len / 2);
342 if (current_frame->len % 2 == 1) {
346 __m256i mask_lower_byte = _mm256_set1_epi16(0x00ff);
347 while (in < (const __m256i *)limit) {
348 __m256i data1 = _mm256_load_si256(in);
349 __m256i data2 = _mm256_load_si256(in + 1);
350 __m256i data1_lo = _mm256_and_si256(data1, mask_lower_byte);
351 __m256i data2_lo = _mm256_and_si256(data2, mask_lower_byte);
352 __m256i data1_hi = _mm256_srli_epi16(data1, 8);
353 __m256i data2_hi = _mm256_srli_epi16(data2, 8);
354 __m256i lo = _mm256_packus_epi16(data1_lo, data2_lo);
355 lo = _mm256_permute4x64_epi64(lo, 0b11011000);
356 _mm256_storeu_si256(out1, lo); // Store as early as possible, even if the data isn't used.
357 __m256i hi = _mm256_packus_epi16(data1_hi, data2_hi);
358 hi = _mm256_permute4x64_epi64(hi, 0b11011000);
359 _mm256_storeu_si256(out2, hi);
360 __m256i found1 = _mm256_cmpeq_epi8(data1, needle);
361 __m256i found2 = _mm256_cmpeq_epi8(data2, needle);
362 if (!_mm256_testz_si256(found1, found1) ||
363 !_mm256_testz_si256(found2, found2)) {
371 current_frame->len += (uint8_t *)in - aligned_start;
373 __m256i *out = (__m256i *)(current_frame->data + current_frame->len);
374 while (in < (const __m256i *)limit) {
375 __m256i data = _mm256_load_si256(in);
376 _mm256_storeu_si256(out, data); // Store as early as possible, even if the data isn't used.
377 __m256i found = _mm256_cmpeq_epi8(data, needle);
378 if (!_mm256_testz_si256(found, found)) {
385 current_frame->len = (uint8_t *)out - current_frame->data;
388 const __m128i needle = _mm_set1_epi8(sync_char);
390 const __m128i *in = (const __m128i *)aligned_start;
391 if (current_frame->interleaved) {
392 __m128i *out1 = (__m128i *)(current_frame->data + (current_frame->len + 1) / 2);
393 __m128i *out2 = (__m128i *)(current_frame->data2 + current_frame->len / 2);
394 if (current_frame->len % 2 == 1) {
398 __m128i mask_lower_byte = _mm_set1_epi16(0x00ff);
399 while (in < (const __m128i *)limit) {
400 __m128i data1 = _mm_load_si128(in);
401 __m128i data2 = _mm_load_si128(in + 1);
402 __m128i data1_lo = _mm_and_si128(data1, mask_lower_byte);
403 __m128i data2_lo = _mm_and_si128(data2, mask_lower_byte);
404 __m128i data1_hi = _mm_srli_epi16(data1, 8);
405 __m128i data2_hi = _mm_srli_epi16(data2, 8);
406 __m128i lo = _mm_packus_epi16(data1_lo, data2_lo);
407 _mm_storeu_si128(out1, lo); // Store as early as possible, even if the data isn't used.
408 __m128i hi = _mm_packus_epi16(data1_hi, data2_hi);
409 _mm_storeu_si128(out2, hi);
410 __m128i found1 = _mm_cmpeq_epi8(data1, needle);
411 __m128i found2 = _mm_cmpeq_epi8(data2, needle);
412 if (!_mm_testz_si128(found1, found1) ||
413 !_mm_testz_si128(found2, found2)) {
421 current_frame->len += (uint8_t *)in - aligned_start;
423 __m128i *out = (__m128i *)(current_frame->data + current_frame->len);
424 while (in < (const __m128i *)limit) {
425 __m128i data = _mm_load_si128(in);
426 _mm_storeu_si128(out, data); // Store as early as possible, even if the data isn't used.
427 __m128i found = _mm_cmpeq_epi8(data, needle);
428 if (!_mm_testz_si128(found, found)) {
435 current_frame->len = (uint8_t *)out - current_frame->data;
439 //printf("managed to fastpath %ld/%ld bytes\n", (const uint8_t *)in - (const uint8_t *)aligned_start, orig_bytes);
441 return (const uint8_t *)in;
445 void decode_packs(const libusb_transfer *xfr,
446 const char *sync_pattern,
448 FrameAllocator::Frame *current_frame,
449 const char *frame_type_name,
450 function<void(const uint8_t *start)> start_callback)
453 for (int i = 0; i < xfr->num_iso_packets; i++) {
454 const libusb_iso_packet_descriptor *pack = &xfr->iso_packet_desc[i];
456 if (pack->status != LIBUSB_TRANSFER_COMPLETED) {
457 fprintf(stderr, "Error: pack %u/%u status %d\n", i, xfr->num_iso_packets, pack->status);
462 const uint8_t *start = xfr->buffer + offset;
463 const uint8_t *limit = start + pack->actual_length;
464 while (start < limit) { // Usually runs only one iteration.
466 start = add_to_frame_fastpath(current_frame, start, limit, sync_pattern[0]);
467 if (start == limit) break;
468 assert(start < limit);
471 const unsigned char* start_next_frame = (const unsigned char *)memmem(start, limit - start, sync_pattern, sync_length);
472 if (start_next_frame == nullptr) {
473 // add the rest of the buffer
474 add_to_frame(current_frame, frame_type_name, start, limit);
477 add_to_frame(current_frame, frame_type_name, start, start_next_frame);
478 start = start_next_frame + sync_length; // skip sync
479 start_callback(start);
483 dump_pack(xfr, offset, pack);
485 offset += pack->length;
489 void BMUSBCapture::cb_xfr(struct libusb_transfer *xfr)
491 if (xfr->status != LIBUSB_TRANSFER_COMPLETED) {
492 fprintf(stderr, "transfer status %d\n", xfr->status);
493 libusb_free_transfer(xfr);
497 assert(xfr->user_data != nullptr);
498 BMUSBCapture *usb = static_cast<BMUSBCapture *>(xfr->user_data);
500 if (xfr->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) {
501 if (xfr->endpoint == 0x84) {
502 decode_packs(xfr, "DeckLinkAudioResyncT", 20, &usb->current_audio_frame, "audio", bind(&BMUSBCapture::start_new_audio_block, usb, _1));
504 decode_packs(xfr, "\x00\x00\xff\xff", 4, &usb->current_video_frame, "video", bind(&BMUSBCapture::start_new_frame, usb, _1));
507 if (xfr->type == LIBUSB_TRANSFER_TYPE_CONTROL) {
508 //const libusb_control_setup *setup = libusb_control_transfer_get_setup(xfr);
509 uint8_t *buf = libusb_control_transfer_get_data(xfr);
511 if (setup->wIndex == 44) {
512 printf("read timer register: 0x%02x%02x%02x%02x\n", buf[0], buf[1], buf[2], buf[3]);
514 printf("read register %2d: 0x%02x%02x%02x%02x\n",
515 setup->wIndex, buf[0], buf[1], buf[2], buf[3]);
518 memcpy(usb->register_file + usb->current_register, buf, 4);
519 usb->current_register = (usb->current_register + 4) % NUM_BMUSB_REGISTERS;
520 if (usb->current_register == 0) {
521 // read through all of them
522 printf("register dump:");
523 for (int i = 0; i < NUM_BMUSB_REGISTERS; i += 4) {
524 printf(" 0x%02x%02x%02x%02x", usb->register_file[i], usb->register_file[i + 1], usb->register_file[i + 2], usb->register_file[i + 3]);
528 libusb_fill_control_setup(xfr->buffer,
529 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
530 /*index=*/usb->current_register, /*length=*/4);
535 printf("length:%u, actual_length:%u\n", xfr->length, xfr->actual_length);
536 for (i = 0; i < xfr->actual_length; i++) {
537 printf("%02x", xfr->buffer[i]);
547 if (libusb_submit_transfer(xfr) < 0) {
548 fprintf(stderr, "error re-submitting URB\n");
553 void BMUSBCapture::usb_thread_func()
555 printf("usb thread started\n");
558 memset(¶m, 0, sizeof(param));
559 param.sched_priority = 1;
560 if (sched_setscheduler(0, SCHED_RR, ¶m) == -1) {
561 printf("couldn't set realtime priority for USB thread: %s\n", strerror(errno));
563 while (!should_quit) {
564 int rc = libusb_handle_events(nullptr);
565 if (rc != LIBUSB_SUCCESS)
570 void BMUSBCapture::start_bm_capture()
572 if (video_frame_allocator == nullptr) {
573 set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE)); // FIXME: leak.
575 if (audio_frame_allocator == nullptr) {
576 set_audio_frame_allocator(new MallocFrameAllocator(65536)); // FIXME: leak.
578 thread(&BMUSBCapture::dequeue_thread, this).detach();
581 struct libusb_transfer *xfr;
582 vector<libusb_transfer *> iso_xfrs;
584 rc = libusb_init(nullptr);
586 fprintf(stderr, "Error initializing libusb: %s\n", libusb_error_name(rc));
590 struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, 0x1edb, 0xbd3b);
592 fprintf(stderr, "Error finding USB device\n");
596 libusb_config_descriptor *config;
597 rc = libusb_get_config_descriptor(libusb_get_device(devh), /*config_index=*/0, &config);
599 fprintf(stderr, "Error getting configuration: %s\n", libusb_error_name(rc));
602 printf("%d interface\n", config->bNumInterfaces);
603 for (int interface_number = 0; interface_number < config->bNumInterfaces; ++interface_number) {
604 printf(" interface %d\n", interface_number);
605 const libusb_interface *interface = &config->interface[interface_number];
606 for (int altsetting = 0; altsetting < interface->num_altsetting; ++altsetting) {
607 const libusb_interface_descriptor *interface_desc = &interface->altsetting[altsetting];
608 printf(" alternate setting %d\n", interface_desc->bAlternateSetting);
609 for (int endpoint_number = 0; endpoint_number < interface_desc->bNumEndpoints; ++endpoint_number) {
610 const libusb_endpoint_descriptor *endpoint = &interface_desc->endpoint[endpoint_number];
611 printf(" endpoint address 0x%02x\n", endpoint->bEndpointAddress);
616 rc = libusb_set_configuration(devh, /*configuration=*/1);
618 fprintf(stderr, "Error setting configuration 1: %s\n", libusb_error_name(rc));
622 rc = libusb_claim_interface(devh, 0);
624 fprintf(stderr, "Error claiming interface 0: %s\n", libusb_error_name(rc));
628 // Alternate setting 1 is output, alternate setting 2 is input.
629 // Card is reset when switching alternates, so the driver uses
630 // this “double switch” when it wants to reset.
631 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
633 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
636 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/2);
638 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
642 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
644 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
650 rc = libusb_claim_interface(devh, 3);
652 fprintf(stderr, "Error claiming interface 3: %s\n", libusb_error_name(rc));
658 // 44 is some kind of timer register (first 16 bits count upwards)
659 // 24 is some sort of watchdog?
660 // you can seemingly set it to 0x73c60001 and that bit will eventually disappear
661 // (or will go to 0x73c60010?), also seen 0x73c60100
662 // 12 also changes all the time, unclear why
663 // 16 seems to be autodetected mode somehow
664 // -- this is e00115e0 after reset?
665 // ed0115e0 after mode change [to output?]
666 // 2d0015e0 after more mode change [to input]
667 // ed0115e0 after more mode change
668 // 2d0015e0 after more mode change
670 // 390115e0 seems to indicate we have signal
671 // changes to 200115e0 when resolution changes/we lose signal, driver resets after a while
673 // 200015e0 on startup
674 // changes to 250115e0 when we sync to the signal
676 // so only first 16 bits count, and 0x0100 is a mask for ok/stable signal?
678 // 28 and 32 seems to be analog audio input levels (one byte for each of the eight channels).
679 // however, if setting 32 with HDMI embedded audio, it is immediately overwritten back (to 0xe137002a).
681 // 4, 8, 20 are unclear. seem to be some sort of bitmask, but we can set them to 0 with no apparent effect.
682 // perhaps some of them are related to analog output?
684 // 36 can be set to 0 with no apparent effect (all of this tested on both video and audio),
685 // but the driver sets it to 0x8036802a at some point.
688 // first byte is 0x39 for a stable 576p60 signal, 0x2d for a stable 720p60 signal, 0x20 for no signal
691 // 0x01 - stable signal
693 // 0x08 - unknown (audio??)
703 static const ctrl ctrls[] = {
704 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
705 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
706 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
707 { LIBUSB_ENDPOINT_IN, 214, 4, 0 },
708 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
709 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
710 { LIBUSB_ENDPOINT_IN, 214, 20, 0 },
711 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
712 { LIBUSB_ENDPOINT_IN, 214, 28, 0 },
713 { LIBUSB_ENDPOINT_IN, 215, 32, 0 },
714 { LIBUSB_ENDPOINT_IN, 214, 36, 0 },
715 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
716 { LIBUSB_ENDPOINT_IN, 216, 44, 0 },
717 { LIBUSB_ENDPOINT_IN, 214, 48, 0 },
718 { LIBUSB_ENDPOINT_IN, 214, 52, 0 },
719 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
720 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
721 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
722 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
723 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
724 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
725 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
726 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
727 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
728 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
729 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
730 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
731 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
732 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
733 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
734 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
735 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
736 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
737 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
738 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
739 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
740 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
741 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
742 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
743 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
744 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
745 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
746 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
747 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
748 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
749 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
750 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
751 { LIBUSB_ENDPOINT_IN, 214, 12, 0 }, // packet 354
752 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
753 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
754 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
755 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
757 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x80000100 },
758 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 }, // wow, some kind of mode
760 // seems to capture on HDMI, clearing the 0x20000000 bit seems to activate 10-bit
762 // clearing the 0x08000000 bit seems to change the capture format (other source?)
763 // 0x10000000 = analog audio instead of embedded audio, it seems
764 // 0x3a000000 = component video? (analog audio)
765 // 0x3c000000 = composite video? (analog audio)
766 // 0x3e000000 = s-video? (analog audio)
767 { LIBUSB_ENDPOINT_OUT, 215, 0, 0x29000000 },
768 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 },
770 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0xffffffff },
771 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0xffffffff },
772 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x40404040 },
773 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x40404040 },
774 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x8036802a },
775 { LIBUSB_ENDPOINT_OUT, 215, 24, 0x73c60001 }, // latch for frame start?
776 //{ LIBUSB_ENDPOINT_OUT, 215, 24, 0x13370001 }, // latch for frame start?
777 { LIBUSB_ENDPOINT_IN, 214, 24, 0 }, //
778 //{ LIBUSB_ENDPOINT_OUT, 215, 4, 0x00000000 }, // appears to have no e fect
779 //{ LIBUSB_ENDPOINT_OUT, 215, 8, 0x00000000 }, // appears to have no effect
780 //{ LIBUSB_ENDPOINT_OUT, 215, 20, 0x00000000 }, // appears to have no effect
781 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x00000000 }, // appears to have no effect
782 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x00000000 }, // appears to have no effect
783 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x00000000 }, // appears to have no effect
785 { LIBUSB_ENDPOINT_OUT, 215, 0 },
786 { LIBUSB_ENDPOINT_OUT, 215, 0 },
787 { LIBUSB_ENDPOINT_OUT, 215, 28 },
788 { LIBUSB_ENDPOINT_OUT, 215, 32 },
789 { LIBUSB_ENDPOINT_OUT, 215, 36 },
790 { LIBUSB_ENDPOINT_OUT, 215, 24 },
791 { LIBUSB_ENDPOINT_OUT, 215, 24 },
792 { LIBUSB_ENDPOINT_OUT, 215, 24 },
793 { LIBUSB_ENDPOINT_OUT, 215, 24 },
794 { LIBUSB_ENDPOINT_OUT, 215, 24 },
795 { LIBUSB_ENDPOINT_OUT, 215, 24 },
796 { LIBUSB_ENDPOINT_OUT, 215, 24 },
797 { LIBUSB_ENDPOINT_OUT, 215, 24 },
798 { LIBUSB_ENDPOINT_OUT, 215, 24 },
799 { LIBUSB_ENDPOINT_OUT, 215, 24 },
800 { LIBUSB_ENDPOINT_OUT, 215, 0 },
801 { LIBUSB_ENDPOINT_OUT, 215, 24 },
802 { LIBUSB_ENDPOINT_OUT, 215, 24 },
803 { LIBUSB_ENDPOINT_OUT, 215, 24 },
804 { LIBUSB_ENDPOINT_OUT, 215, 24 },
805 { LIBUSB_ENDPOINT_OUT, 215, 24 },
806 { LIBUSB_ENDPOINT_OUT, 215, 24 },
810 for (unsigned req = 0; req < sizeof(ctrls) / sizeof(ctrls[0]); ++req) {
811 uint32_t flipped = htonl(ctrls[req].data);
812 static uint8_t value[4];
813 memcpy(value, &flipped, sizeof(flipped));
814 int size = sizeof(value);
815 //if (ctrls[req].request == 215) size = 0;
816 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | ctrls[req].endpoint,
817 /*request=*/ctrls[req].request, /*value=*/0, /*index=*/ctrls[req].index, value, size, /*timeout=*/0);
819 fprintf(stderr, "Error on control %d: %s\n", ctrls[req].index, libusb_error_name(rc));
823 printf("rc=%d: ep=%d@%d %d -> 0x", rc, ctrls[req].endpoint, ctrls[req].request, ctrls[req].index);
824 for (int i = 0; i < rc; ++i) {
825 printf("%02x", value[i]);
833 static int my_index = 0;
834 static uint8_t value[4];
835 int size = sizeof(value);
836 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
837 /*request=*/214, /*value=*/0, /*index=*/my_index, value, size, /*timeout=*/0);
839 fprintf(stderr, "Error on control\n");
842 printf("rc=%d index=%d: 0x", rc, my_index);
843 for (int i = 0; i < rc; ++i) {
844 printf("%02x", value[i]);
851 // set up an asynchronous transfer of the timer register
852 static uint8_t cmdbuf[LIBUSB_CONTROL_SETUP_SIZE + 4];
853 static int completed = 0;
855 xfr = libusb_alloc_transfer(0);
856 libusb_fill_control_setup(cmdbuf,
857 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
858 /*index=*/44, /*length=*/4);
859 libusb_fill_control_transfer(xfr, devh, cmdbuf, cb_xfr, &completed, 0);
860 xfr->user_data = this;
861 libusb_submit_transfer(xfr);
863 // set up an asynchronous transfer of register 24
864 static uint8_t cmdbuf2[LIBUSB_CONTROL_SETUP_SIZE + 4];
865 static int completed2 = 0;
867 xfr = libusb_alloc_transfer(0);
868 libusb_fill_control_setup(cmdbuf2,
869 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
870 /*index=*/24, /*length=*/4);
871 libusb_fill_control_transfer(xfr, devh, cmdbuf2, cb_xfr, &completed2, 0);
872 xfr->user_data = this;
873 libusb_submit_transfer(xfr);
876 // set up an asynchronous transfer of the register dump
877 static uint8_t cmdbuf3[LIBUSB_CONTROL_SETUP_SIZE + 4];
878 static int completed3 = 0;
880 xfr = libusb_alloc_transfer(0);
881 libusb_fill_control_setup(cmdbuf3,
882 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
883 /*index=*/current_register, /*length=*/4);
884 libusb_fill_control_transfer(xfr, devh, cmdbuf3, cb_xfr, &completed3, 0);
885 xfr->user_data = this;
886 //libusb_submit_transfer(xfr);
888 audiofp = fopen("audio.raw", "wb");
890 // set up isochronous transfers for audio and video
891 for (int e = 3; e <= 4; ++e) {
892 //int num_transfers = (e == 3) ? 6 : 6;
893 int num_transfers = 6;
894 for (int i = 0; i < num_transfers; ++i) {
895 int num_iso_pack, size;
897 // Video seems to require isochronous packets scaled with the width;
898 // seemingly six lines is about right, rounded up to the required 1kB
900 size = WIDTH * 2 * 6;
901 // Note that for 10-bit input, you'll need to increase size accordingly.
902 //size = size * 4 / 3;
903 if (size % 1024 != 0) {
907 num_iso_pack = (2 << 20) / size; // 2 MB.
908 printf("Picking %d packets of 0x%x bytes each\n", num_iso_pack, size);
913 int num_bytes = num_iso_pack * size;
914 uint8_t *buf = new uint8_t[num_bytes];
916 xfr = libusb_alloc_transfer(num_iso_pack);
918 fprintf(stderr, "oom\n");
922 int ep = LIBUSB_ENDPOINT_IN | e;
923 libusb_fill_iso_transfer(xfr, devh, ep, buf, num_bytes,
924 num_iso_pack, cb_xfr, nullptr, 0);
925 libusb_set_iso_packet_lengths(xfr, size);
926 xfr->user_data = this;
927 iso_xfrs.push_back(xfr);
933 for (libusb_transfer *xfr : iso_xfrs) {
934 rc = libusb_submit_transfer(xfr);
937 //printf("num_bytes=%d\n", num_bytes);
938 fprintf(stderr, "Error submitting iso to endpoint 0x%02x, number %d: %s\n",
939 xfr->endpoint, i, libusb_error_name(rc));
946 usb_thread = thread(&BMUSBCapture::usb_thread_func, this);
950 libusb_release_interface(devh, 0);
954 libusb_exit(nullptr);
959 void BMUSBCapture::stop_bm_capture()