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>
33 static int current_register = 0;
35 #define NUM_REGISTERS 60
36 uint8_t register_file[NUM_REGISTERS];
39 #define HEIGHT 750 /* 30 lines ancillary data? */
41 //#define HEIGHT 1125 /* ??? lines ancillary data? */
42 #define HEADER_SIZE 44
43 //#define HEADER_SIZE 0
44 #define AUDIO_HEADER_SIZE 4
46 //#define FRAME_SIZE (WIDTH * HEIGHT * 2 + HEADER_SIZE) // UYVY
47 //#define FRAME_SIZE (WIDTH * HEIGHT * 2 * 4 / 3 + HEADER_SIZE) // v210
48 #define FRAME_SIZE (8 << 20)
52 FrameAllocator::Frame current_video_frame;
53 FrameAllocator::Frame current_audio_frame;
58 FrameAllocator::Frame frame;
62 condition_variable queues_not_empty;
63 deque<QueuedFrame> pending_video_frames;
64 deque<QueuedFrame> pending_audio_frames;
67 atomic<bool> should_quit;
69 FrameAllocator::~FrameAllocator() {}
71 #define NUM_QUEUED_FRAMES 8
72 class MallocFrameAllocator : public FrameAllocator {
74 MallocFrameAllocator(size_t frame_size);
75 Frame alloc_frame() override;
76 void release_frame(Frame frame) override;
82 stack<unique_ptr<uint8_t[]>> freelist; // All of size <frame_size>.
85 MallocFrameAllocator::MallocFrameAllocator(size_t frame_size)
86 : frame_size(frame_size)
88 for (int i = 0; i < NUM_QUEUED_FRAMES; ++i) {
89 freelist.push(unique_ptr<uint8_t[]>(new uint8_t[frame_size]));
93 FrameAllocator::Frame MallocFrameAllocator::alloc_frame()
98 unique_lock<mutex> lock(freelist_mutex); // Meh.
99 if (freelist.empty()) {
100 printf("Frame overrun (no more spare frames of size %ld), dropping frame!\n",
103 vf.data = freelist.top().release();
104 vf.size = frame_size;
105 freelist.pop(); // Meh.
110 void MallocFrameAllocator::release_frame(Frame frame)
112 unique_lock<mutex> lock(freelist_mutex);
113 freelist.push(unique_ptr<uint8_t[]>(frame.data));
116 FrameAllocator *video_frame_allocator = nullptr;
117 FrameAllocator *audio_frame_allocator = nullptr;
118 frame_callback_t frame_callback = nullptr;
120 bool uint16_less_than_with_wraparound(uint16_t a, uint16_t b)
125 return (b - a < 0x8000);
127 int wrap_b = 0x10000 + int(b);
128 return (wrap_b - a < 0x8000);
132 void queue_frame(uint16_t format, uint16_t timecode, FrameAllocator::Frame frame, deque<QueuedFrame> *q)
134 if (!q->empty() && !uint16_less_than_with_wraparound(q->back().timecode, timecode)) {
135 printf("Blocks going backwards: prev=0x%04x, cur=0x%04x (dropped)\n",
136 q->back().timecode, timecode);
137 frame.owner->release_frame(frame);
143 qf.timecode = timecode;
147 unique_lock<mutex> lock(queue_lock);
148 q->push_back(move(qf));
150 queues_not_empty.notify_one(); // might be spurious
153 void dump_frame(const char *filename, uint8_t *frame_start, size_t frame_len)
155 FILE *fp = fopen(filename, "wb");
156 if (fwrite(frame_start + HEADER_SIZE, frame_len - HEADER_SIZE, 1, fp) != 1) {
157 printf("short write!\n");
162 void dump_audio_block(uint8_t *audio_start, size_t audio_len)
164 fwrite(audio_start + AUDIO_HEADER_SIZE, 1, audio_len - AUDIO_HEADER_SIZE, audiofp);
167 void dequeue_thread()
170 unique_lock<mutex> lock(queue_lock);
171 queues_not_empty.wait(lock, []{ return !pending_video_frames.empty() && !pending_audio_frames.empty(); });
173 uint16_t video_timecode = pending_video_frames.front().timecode;
174 uint16_t audio_timecode = pending_audio_frames.front().timecode;
175 if (video_timecode < audio_timecode) {
176 printf("Video block 0x%04x without corresponding audio block, dropping.\n",
178 video_frame_allocator->release_frame(pending_video_frames.front().frame);
179 pending_video_frames.pop_front();
180 } else if (audio_timecode < video_timecode) {
181 printf("Audio block 0x%04x without corresponding video block, dropping.\n",
183 audio_frame_allocator->release_frame(pending_audio_frames.front().frame);
184 pending_audio_frames.pop_front();
186 QueuedFrame video_frame = pending_video_frames.front();
187 QueuedFrame audio_frame = pending_audio_frames.front();
188 pending_audio_frames.pop_front();
189 pending_video_frames.pop_front();
194 snprintf(filename, sizeof(filename), "%04x%04x.uyvy", video_frame.format, video_timecode);
195 dump_frame(filename, video_frame.frame.data, video_frame.data_len);
196 dump_audio_block(audio_frame.frame.data, audio_frame.data_len);
199 frame_callback(video_timecode,
200 video_frame.frame, HEADER_SIZE, video_frame.format,
201 audio_frame.frame, AUDIO_HEADER_SIZE, audio_frame.format);
206 void start_new_frame(const uint8_t *start)
208 uint16_t format = (start[3] << 8) | start[2];
209 uint16_t timecode = (start[1] << 8) | start[0];
211 if (current_video_frame.len > 0) {
213 queue_frame(format, timecode, current_video_frame, &pending_video_frames);
215 //printf("Found frame start, format 0x%04x timecode 0x%04x, previous frame length was %d/%d\n",
217 // //start[7], start[6], start[5], start[4],
218 // read_current_frame, FRAME_SIZE);
220 current_video_frame = video_frame_allocator->alloc_frame();
221 //if (current_video_frame.data == nullptr) {
222 // read_current_frame = -1;
224 // read_current_frame = 0;
228 void start_new_audio_block(const uint8_t *start)
230 uint16_t format = (start[3] << 8) | start[2];
231 uint16_t timecode = (start[1] << 8) | start[0];
232 if (current_audio_frame.len > 0) {
233 //dump_audio_block();
234 queue_frame(format, timecode, current_audio_frame, &pending_audio_frames);
236 //printf("Found audio block start, format 0x%04x timecode 0x%04x, previous block length was %d\n",
237 // format, timecode, read_current_audio_block);
238 current_audio_frame = audio_frame_allocator->alloc_frame();
242 static void dump_pack(const libusb_transfer *xfr, int offset, const libusb_iso_packet_descriptor *pack)
244 // printf("ISO pack%u length:%u, actual_length:%u, offset:%u\n", i, pack->length, pack->actual_length, offset);
245 for (unsigned j = 0; j < pack->actual_length; j++) {
246 //for (int j = 0; j < min(pack->actual_length, 16u); j++) {
247 printf("%02x", xfr->buffer[j + offset]);
250 else if ((j % 8) == 7)
258 void add_to_frame(FrameAllocator::Frame *current_frame, const char *frame_type_name, const uint8_t *start, const uint8_t *end)
260 if (current_frame->data == nullptr ||
261 current_frame->len > current_frame->size ||
266 int bytes = end - start;
267 if (current_frame->len + bytes > current_frame->size) {
268 printf("%d bytes overflow after last %s frame\n",
269 int(current_frame->len + bytes - current_frame->size), frame_type_name);
272 memcpy(current_frame->data + current_frame->len, start, bytes);
273 current_frame->len += bytes;
279 // Does a memcpy and memchr in one to reduce processing time.
280 // Note that the benefit is somewhat limited if your L3 cache is small,
281 // as you'll (unfortunately) spend most of the time loading the data
284 // Complicated cases are left to the slow path; it basically stops copying
285 // up until the first instance of "sync_char" (usually a bit before, actually).
286 // This is fine, since 0x00 bytes shouldn't really show up in normal picture
287 // data, and what we really need this for is the 00 00 ff ff marker in video data.
288 const uint8_t *add_to_frame_fastpath(FrameAllocator::Frame *current_frame, const uint8_t *start, const uint8_t *limit, const char sync_char)
290 if (current_frame->data == nullptr ||
291 current_frame->len > current_frame->size ||
295 size_t orig_bytes = limit - start;
296 if (orig_bytes < 128) {
301 // Don't read more bytes than we can write.
302 limit = min(limit, start + (current_frame->size - current_frame->len));
304 // Align end to 32 bytes.
305 limit = (const uint8_t *)(intptr_t(limit) & ~31);
307 if (start >= limit) {
311 // Process [0,31] bytes, such that start gets aligned to 32 bytes.
312 const uint8_t *aligned_start = (const uint8_t *)(intptr_t(start + 31) & ~31);
313 if (aligned_start != start) {
314 const uint8_t *sync_start = (const uint8_t *)memchr(start, sync_char, aligned_start - start);
315 if (sync_start == nullptr) {
316 memcpy(current_frame->data, start, aligned_start - start);
317 current_frame->len += aligned_start - start;
319 memcpy(current_frame->data, start, sync_start - start);
320 current_frame->len += sync_start - start;
326 const __m256i needle = _mm256_set1_epi8(sync_char);
328 const __m256i *in = (const __m256i *)aligned_start;
329 __m256i *out = (__m256i *)(current_frame->data + current_frame->len);
330 while (in < (const __m256i *)limit) {
331 __m256i data = _mm256_load_si256(in);
332 _mm256_storeu_si256(out, data); // Store as early as possible, even if the data isn't used.
333 __m256i found = _mm256_cmpeq_epi8(data, needle);
334 if (!_mm256_testz_si256(found, found)) {
342 const __m128i needle = _mm_set1_epi8(sync_char);
344 const __m128i *in = (const __m128i *)aligned_start;
345 __m128i *out = (__m128i *)(current_frame->data + current_frame->len);
346 while (in < (const __m128i *)limit) {
347 __m128i data = _mm_load_si128(in);
348 _mm_storeu_si128(out, data); // Store as early as possible, even if the data isn't used.
349 __m128i found = _mm_cmpeq_epi8(data, needle);
350 if (!_mm_testz_si128(found, found)) {
359 //printf("managed to fastpath %ld/%ld bytes\n", (const uint8_t *)in - (const uint8_t *)aligned_start, orig_bytes);
361 current_frame->len = (uint8_t *)out - current_frame->data;
362 return (const uint8_t *)in;
366 void decode_packs(const libusb_transfer *xfr,
367 const char *sync_pattern,
369 FrameAllocator::Frame *current_frame,
370 const char *frame_type_name,
371 function<void(const uint8_t *start)> start_callback)
374 for (int i = 0; i < xfr->num_iso_packets; i++) {
375 const libusb_iso_packet_descriptor *pack = &xfr->iso_packet_desc[i];
377 if (pack->status != LIBUSB_TRANSFER_COMPLETED) {
378 fprintf(stderr, "Error: pack %u/%u status %d\n", i, xfr->num_iso_packets, pack->status);
383 const uint8_t *start = xfr->buffer + offset;
384 const uint8_t *limit = start + pack->actual_length;
385 while (start < limit) { // Usually runs only one iteration.
387 start = add_to_frame_fastpath(current_frame, start, limit, sync_pattern[0]);
388 if (start == limit) break;
389 assert(start < limit);
392 const unsigned char* start_next_frame = (const unsigned char *)memmem(start, limit - start, sync_pattern, sync_length);
393 if (start_next_frame == nullptr) {
394 // add the rest of the buffer
395 add_to_frame(current_frame, frame_type_name, start, limit);
398 add_to_frame(current_frame, frame_type_name, start, start_next_frame);
399 start = start_next_frame + sync_length; // skip sync
400 start_callback(start);
404 dump_pack(xfr, offset, pack);
406 offset += pack->length;
410 static void cb_xfr(struct libusb_transfer *xfr)
412 if (xfr->status != LIBUSB_TRANSFER_COMPLETED) {
413 fprintf(stderr, "transfer status %d\n", xfr->status);
414 libusb_free_transfer(xfr);
418 if (xfr->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) {
419 if (xfr->endpoint == 0x84) {
420 decode_packs(xfr, "DeckLinkAudioResyncT", 20, ¤t_audio_frame, "audio", start_new_audio_block);
422 decode_packs(xfr, "\x00\x00\xff\xff", 4, ¤t_video_frame, "video", start_new_frame);
425 if (xfr->type == LIBUSB_TRANSFER_TYPE_CONTROL) {
426 //const libusb_control_setup *setup = libusb_control_transfer_get_setup(xfr);
427 uint8_t *buf = libusb_control_transfer_get_data(xfr);
429 if (setup->wIndex == 44) {
430 printf("read timer register: 0x%02x%02x%02x%02x\n", buf[0], buf[1], buf[2], buf[3]);
432 printf("read register %2d: 0x%02x%02x%02x%02x\n",
433 setup->wIndex, buf[0], buf[1], buf[2], buf[3]);
436 memcpy(register_file + current_register, buf, 4);
437 current_register = (current_register + 4) % NUM_REGISTERS;
438 if (current_register == 0) {
439 // read through all of them
440 printf("register dump:");
441 for (int i = 0; i < NUM_REGISTERS; i += 4) {
442 printf(" 0x%02x%02x%02x%02x", register_file[i], register_file[i + 1], register_file[i + 2], register_file[i + 3]);
446 libusb_fill_control_setup(xfr->buffer,
447 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
448 /*index=*/current_register, /*length=*/4);
453 printf("length:%u, actual_length:%u\n", xfr->length, xfr->actual_length);
454 for (i = 0; i < xfr->actual_length; i++) {
455 printf("%02x", xfr->buffer[i]);
465 if (libusb_submit_transfer(xfr) < 0) {
466 fprintf(stderr, "error re-submitting URB\n");
471 void usb_thread_func()
473 printf("usb thread started\n");
476 memset(¶m, 0, sizeof(param));
477 param.sched_priority = 1;
478 if (sched_setscheduler(0, SCHED_RR, ¶m) == -1) {
479 printf("couldn't set realtime priority for USB thread: %s\n", strerror(errno));
481 while (!should_quit) {
482 int rc = libusb_handle_events(nullptr);
483 if (rc != LIBUSB_SUCCESS)
488 FrameAllocator *get_video_frame_allocator()
490 return video_frame_allocator;
493 void set_video_frame_allocator(FrameAllocator *allocator)
495 video_frame_allocator = allocator;
498 FrameAllocator *get_audio_frame_allocator()
500 return audio_frame_allocator;
503 void set_audio_frame_allocator(FrameAllocator *allocator)
505 audio_frame_allocator = allocator;
508 void set_frame_callback(frame_callback_t callback)
510 frame_callback = callback;
513 void start_bm_capture()
515 if (video_frame_allocator == nullptr) {
516 set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE)); // FIXME: leak.
518 if (audio_frame_allocator == nullptr) {
519 set_audio_frame_allocator(new MallocFrameAllocator(65536)); // FIXME: leak.
521 thread(dequeue_thread).detach();
524 struct libusb_transfer *xfr;
525 vector<libusb_transfer *> iso_xfrs;
527 rc = libusb_init(nullptr);
529 fprintf(stderr, "Error initializing libusb: %s\n", libusb_error_name(rc));
533 struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, 0x1edb, 0xbd3b);
535 fprintf(stderr, "Error finding USB device\n");
539 libusb_config_descriptor *config;
540 rc = libusb_get_config_descriptor(libusb_get_device(devh), /*config_index=*/0, &config);
542 fprintf(stderr, "Error getting configuration: %s\n", libusb_error_name(rc));
545 printf("%d interface\n", config->bNumInterfaces);
546 for (int interface_number = 0; interface_number < config->bNumInterfaces; ++interface_number) {
547 printf(" interface %d\n", interface_number);
548 const libusb_interface *interface = &config->interface[interface_number];
549 for (int altsetting = 0; altsetting < interface->num_altsetting; ++altsetting) {
550 printf(" alternate setting %d\n", altsetting);
551 const libusb_interface_descriptor *interface_desc = &interface->altsetting[altsetting];
552 for (int endpoint_number = 0; endpoint_number < interface_desc->bNumEndpoints; ++endpoint_number) {
553 const libusb_endpoint_descriptor *endpoint = &interface_desc->endpoint[endpoint_number];
554 printf(" endpoint address 0x%02x\n", endpoint->bEndpointAddress);
559 rc = libusb_set_configuration(devh, /*configuration=*/1);
561 fprintf(stderr, "Error setting configuration 1: %s\n", libusb_error_name(rc));
565 rc = libusb_claim_interface(devh, 0);
567 fprintf(stderr, "Error claiming interface 0: %s\n", libusb_error_name(rc));
571 // Alternate setting 1 is output, alternate setting 2 is input.
572 // Card is reset when switching alternates, so the driver uses
573 // this “double switch” when it wants to reset.
574 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
576 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
579 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/2);
581 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
585 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
587 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
593 rc = libusb_claim_interface(devh, 3);
595 fprintf(stderr, "Error claiming interface 3: %s\n", libusb_error_name(rc));
601 // 44 is some kind of timer register (first 16 bits count upwards)
602 // 24 is some sort of watchdog?
603 // you can seemingly set it to 0x73c60001 and that bit will eventually disappear
604 // (or will go to 0x73c60010?), also seen 0x73c60100
605 // 12 also changes all the time, unclear why
606 // 16 seems to be autodetected mode somehow
607 // -- this is e00115e0 after reset?
608 // ed0115e0 after mode change [to output?]
609 // 2d0015e0 after more mode change [to input]
610 // ed0115e0 after more mode change
611 // 2d0015e0 after more mode change
613 // 390115e0 seems to indicate we have signal
614 // changes to 200115e0 when resolution changes/we lose signal, driver resets after a while
616 // 200015e0 on startup
617 // changes to 250115e0 when we sync to the signal
619 // so only first 16 bits count, and 0x0100 is a mask for ok/stable signal?
621 // 28 and 32 seems to be analog audio input levels (one byte for each of the eight channels).
622 // however, if setting 32 with HDMI embedded audio, it is immediately overwritten back (to 0xe137002a).
624 // 4, 8, 20 are unclear. seem to be some sort of bitmask, but we can set them to 0 with no apparent effect.
625 // perhaps some of them are related to analog output?
627 // 36 can be set to 0 with no apparent effect (all of this tested on both video and audio),
628 // but the driver sets it to 0x8036802a at some point.
631 // first byte is 0x39 for a stable 576p60 signal, 0x2d for a stable 720p60 signal, 0x20 for no signal
634 // 0x01 - stable signal
636 // 0x08 - unknown (audio??)
646 static const ctrl ctrls[] = {
647 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
648 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
649 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
650 { LIBUSB_ENDPOINT_IN, 214, 4, 0 },
651 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
652 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
653 { LIBUSB_ENDPOINT_IN, 214, 20, 0 },
654 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
655 { LIBUSB_ENDPOINT_IN, 214, 28, 0 },
656 { LIBUSB_ENDPOINT_IN, 215, 32, 0 },
657 { LIBUSB_ENDPOINT_IN, 214, 36, 0 },
658 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
659 { LIBUSB_ENDPOINT_IN, 216, 44, 0 },
660 { LIBUSB_ENDPOINT_IN, 214, 48, 0 },
661 { LIBUSB_ENDPOINT_IN, 214, 52, 0 },
662 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
663 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
664 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
665 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
666 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
667 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
668 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
669 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
670 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
671 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
672 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
673 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
674 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
675 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
676 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
677 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
678 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
679 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
680 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
681 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
682 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
683 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
684 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
685 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
686 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
687 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
688 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
689 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
690 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
691 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
692 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
693 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
694 { LIBUSB_ENDPOINT_IN, 214, 12, 0 }, // packet 354
695 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
696 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
697 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
698 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
700 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x80000100 },
701 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 }, // wow, some kind of mode
703 // seems to capture on HDMI, clearing the 0x20000000 bit seems to activate 10-bit
705 // clearing the 0x08000000 bit seems to change the capture format (other source?)
706 // 0x10000000 = analog audio instead of embedded audio, it seems
707 // 0x3a000000 = component video? (analog audio)
708 // 0x3c000000 = composite video? (analog audio)
709 // 0x3e000000 = s-video? (analog audio)
710 { LIBUSB_ENDPOINT_OUT, 215, 0, 0x29000000 },
711 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 },
713 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0xffffffff },
714 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0xffffffff },
715 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x40404040 },
716 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x40404040 },
717 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x8036802a },
718 { LIBUSB_ENDPOINT_OUT, 215, 24, 0x73c60001 }, // latch for frame start?
719 //{ LIBUSB_ENDPOINT_OUT, 215, 24, 0x13370001 }, // latch for frame start?
720 { LIBUSB_ENDPOINT_IN, 214, 24, 0 }, //
721 //{ LIBUSB_ENDPOINT_OUT, 215, 4, 0x00000000 }, // appears to have no e fect
722 //{ LIBUSB_ENDPOINT_OUT, 215, 8, 0x00000000 }, // appears to have no effect
723 //{ LIBUSB_ENDPOINT_OUT, 215, 20, 0x00000000 }, // appears to have no effect
724 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x00000000 }, // appears to have no effect
725 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x00000000 }, // appears to have no effect
726 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x00000000 }, // appears to have no effect
728 { LIBUSB_ENDPOINT_OUT, 215, 0 },
729 { LIBUSB_ENDPOINT_OUT, 215, 0 },
730 { LIBUSB_ENDPOINT_OUT, 215, 28 },
731 { LIBUSB_ENDPOINT_OUT, 215, 32 },
732 { LIBUSB_ENDPOINT_OUT, 215, 36 },
733 { LIBUSB_ENDPOINT_OUT, 215, 24 },
734 { LIBUSB_ENDPOINT_OUT, 215, 24 },
735 { LIBUSB_ENDPOINT_OUT, 215, 24 },
736 { LIBUSB_ENDPOINT_OUT, 215, 24 },
737 { LIBUSB_ENDPOINT_OUT, 215, 24 },
738 { LIBUSB_ENDPOINT_OUT, 215, 24 },
739 { LIBUSB_ENDPOINT_OUT, 215, 24 },
740 { LIBUSB_ENDPOINT_OUT, 215, 24 },
741 { LIBUSB_ENDPOINT_OUT, 215, 24 },
742 { LIBUSB_ENDPOINT_OUT, 215, 24 },
743 { LIBUSB_ENDPOINT_OUT, 215, 0 },
744 { LIBUSB_ENDPOINT_OUT, 215, 24 },
745 { LIBUSB_ENDPOINT_OUT, 215, 24 },
746 { LIBUSB_ENDPOINT_OUT, 215, 24 },
747 { LIBUSB_ENDPOINT_OUT, 215, 24 },
748 { LIBUSB_ENDPOINT_OUT, 215, 24 },
749 { LIBUSB_ENDPOINT_OUT, 215, 24 },
753 for (unsigned req = 0; req < sizeof(ctrls) / sizeof(ctrls[0]); ++req) {
754 uint32_t flipped = htonl(ctrls[req].data);
755 static uint8_t value[4];
756 memcpy(value, &flipped, sizeof(flipped));
757 int size = sizeof(value);
758 //if (ctrls[req].request == 215) size = 0;
759 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | ctrls[req].endpoint,
760 /*request=*/ctrls[req].request, /*value=*/0, /*index=*/ctrls[req].index, value, size, /*timeout=*/0);
762 fprintf(stderr, "Error on control %d: %s\n", ctrls[req].index, libusb_error_name(rc));
766 printf("rc=%d: ep=%d@%d %d -> 0x", rc, ctrls[req].endpoint, ctrls[req].request, ctrls[req].index);
767 for (int i = 0; i < rc; ++i) {
768 printf("%02x", value[i]);
776 static int my_index = 0;
777 static uint8_t value[4];
778 int size = sizeof(value);
779 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
780 /*request=*/214, /*value=*/0, /*index=*/my_index, value, size, /*timeout=*/0);
782 fprintf(stderr, "Error on control\n");
785 printf("rc=%d index=%d: 0x", rc, my_index);
786 for (int i = 0; i < rc; ++i) {
787 printf("%02x", value[i]);
794 // set up an asynchronous transfer of the timer register
795 static uint8_t cmdbuf[LIBUSB_CONTROL_SETUP_SIZE + 4];
796 static int completed = 0;
798 xfr = libusb_alloc_transfer(0);
799 libusb_fill_control_setup(cmdbuf,
800 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
801 /*index=*/44, /*length=*/4);
802 libusb_fill_control_transfer(xfr, devh, cmdbuf, cb_xfr, &completed, 0);
803 libusb_submit_transfer(xfr);
805 // set up an asynchronous transfer of register 24
806 static uint8_t cmdbuf2[LIBUSB_CONTROL_SETUP_SIZE + 4];
807 static int completed2 = 0;
809 xfr = libusb_alloc_transfer(0);
810 libusb_fill_control_setup(cmdbuf2,
811 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
812 /*index=*/24, /*length=*/4);
813 libusb_fill_control_transfer(xfr, devh, cmdbuf2, cb_xfr, &completed2, 0);
814 libusb_submit_transfer(xfr);
817 // set up an asynchronous transfer of the register dump
818 static uint8_t cmdbuf3[LIBUSB_CONTROL_SETUP_SIZE + 4];
819 static int completed3 = 0;
821 xfr = libusb_alloc_transfer(0);
822 libusb_fill_control_setup(cmdbuf3,
823 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
824 /*index=*/current_register, /*length=*/4);
825 libusb_fill_control_transfer(xfr, devh, cmdbuf3, cb_xfr, &completed3, 0);
826 //libusb_submit_transfer(xfr);
828 audiofp = fopen("audio.raw", "wb");
830 // set up isochronous transfers for audio and video
831 for (int e = 3; e <= 4; ++e) {
832 //int num_transfers = (e == 3) ? 6 : 6;
833 int num_transfers = 6;
834 for (int i = 0; i < num_transfers; ++i) {
835 int num_iso_pack, size;
837 // Video seems to require isochronous packets scaled with the width;
838 // seemingly six lines is about right, rounded up to the required 1kB
840 size = WIDTH * 2 * 6;
841 // Note that for 10-bit input, you'll need to increase size accordingly.
842 //size = size * 4 / 3;
843 if (size % 1024 != 0) {
847 num_iso_pack = (2 << 20) / size; // 2 MB.
848 printf("Picking %d packets of 0x%x bytes each\n", num_iso_pack, size);
853 int num_bytes = num_iso_pack * size;
854 uint8_t *buf = new uint8_t[num_bytes];
856 xfr = libusb_alloc_transfer(num_iso_pack);
858 fprintf(stderr, "oom\n");
862 int ep = LIBUSB_ENDPOINT_IN | e;
863 libusb_fill_iso_transfer(xfr, devh, ep, buf, num_bytes,
864 num_iso_pack, cb_xfr, nullptr, 0);
865 libusb_set_iso_packet_lengths(xfr, size);
866 iso_xfrs.push_back(xfr);
872 for (libusb_transfer *xfr : iso_xfrs) {
873 rc = libusb_submit_transfer(xfr);
876 //printf("num_bytes=%d\n", num_bytes);
877 fprintf(stderr, "Error submitting iso to endpoint 0x%02x, number %d: %s\n",
878 xfr->endpoint, i, libusb_error_name(rc));
884 usb_thread = thread(usb_thread_func);
888 libusb_release_interface(devh, 0);
892 libusb_exit(nullptr);
897 void stop_bm_capture()