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>
21 #include <condition_variable>
29 static int current_register = 0;
31 #define NUM_REGISTERS 60
32 uint8_t register_file[NUM_REGISTERS];
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::Frame current_video_frame;
49 FrameAllocator::Frame current_audio_frame;
54 FrameAllocator::Frame frame;
58 condition_variable queues_not_empty;
59 deque<QueuedFrame> pending_video_frames;
60 deque<QueuedFrame> pending_audio_frames;
63 atomic<bool> should_quit;
65 FrameAllocator::~FrameAllocator() {}
67 #define NUM_QUEUED_FRAMES 8
68 class MallocFrameAllocator : public FrameAllocator {
70 MallocFrameAllocator(size_t frame_size);
71 Frame alloc_frame() override;
72 void release_frame(Frame frame) override;
78 stack<unique_ptr<uint8_t[]>> freelist; // All of size <frame_size>.
81 MallocFrameAllocator::MallocFrameAllocator(size_t frame_size)
82 : frame_size(frame_size)
84 for (int i = 0; i < NUM_QUEUED_FRAMES; ++i) {
85 freelist.push(unique_ptr<uint8_t[]>(new uint8_t[frame_size]));
89 FrameAllocator::Frame MallocFrameAllocator::alloc_frame()
94 unique_lock<mutex> lock(freelist_mutex); // Meh.
95 if (freelist.empty()) {
96 printf("Frame overrun (no more spare frames of size %ld), dropping frame!\n",
99 vf.data = freelist.top().release();
100 vf.size = frame_size;
101 freelist.pop(); // Meh.
106 void MallocFrameAllocator::release_frame(Frame frame)
108 unique_lock<mutex> lock(freelist_mutex);
109 freelist.push(unique_ptr<uint8_t[]>(frame.data));
112 FrameAllocator *video_frame_allocator = nullptr;
113 FrameAllocator *audio_frame_allocator = nullptr;
114 frame_callback_t frame_callback = nullptr;
116 bool uint16_less_than_with_wraparound(uint16_t a, uint16_t b)
121 return (b - a < 0x8000);
123 int wrap_b = 0x10000 + int(b);
124 return (wrap_b - a < 0x8000);
128 void queue_frame(uint16_t format, uint16_t timecode, FrameAllocator::Frame frame, deque<QueuedFrame> *q)
130 if (!q->empty() && !uint16_less_than_with_wraparound(q->back().timecode, timecode)) {
131 printf("Blocks going backwards: prev=0x%04x, cur=0x%04x (dropped)\n",
132 q->back().timecode, timecode);
133 frame.owner->release_frame(frame);
139 qf.timecode = timecode;
143 unique_lock<mutex> lock(queue_lock);
144 q->push_back(move(qf));
146 queues_not_empty.notify_one(); // might be spurious
149 void dump_frame(const char *filename, uint8_t *frame_start, size_t frame_len)
151 FILE *fp = fopen(filename, "wb");
152 if (fwrite(frame_start + HEADER_SIZE, frame_len - HEADER_SIZE, 1, fp) != 1) {
153 printf("short write!\n");
158 void dump_audio_block(uint8_t *audio_start, size_t audio_len)
160 fwrite(audio_start + AUDIO_HEADER_SIZE, 1, audio_len - AUDIO_HEADER_SIZE, audiofp);
163 void dequeue_thread()
166 unique_lock<mutex> lock(queue_lock);
167 queues_not_empty.wait(lock, []{ return !pending_video_frames.empty() && !pending_audio_frames.empty(); });
169 uint16_t video_timecode = pending_video_frames.front().timecode;
170 uint16_t audio_timecode = pending_audio_frames.front().timecode;
171 if (video_timecode < audio_timecode) {
172 printf("Video block 0x%04x without corresponding audio block, dropping.\n",
174 video_frame_allocator->release_frame(pending_video_frames.front().frame);
175 pending_video_frames.pop_front();
176 } else if (audio_timecode < video_timecode) {
177 printf("Audio block 0x%04x without corresponding video block, dropping.\n",
179 audio_frame_allocator->release_frame(pending_audio_frames.front().frame);
180 pending_audio_frames.pop_front();
182 QueuedFrame video_frame = pending_video_frames.front();
183 QueuedFrame audio_frame = pending_audio_frames.front();
184 pending_audio_frames.pop_front();
185 pending_video_frames.pop_front();
190 snprintf(filename, sizeof(filename), "%04x%04x.uyvy", video_frame.format, video_timecode);
191 dump_frame(filename, video_frame.frame.data, video_frame.data_len);
192 dump_audio_block(audio_frame.frame.data, audio_frame.data_len);
195 frame_callback(video_timecode,
196 video_frame.frame, HEADER_SIZE, video_frame.format,
197 audio_frame.frame, AUDIO_HEADER_SIZE, audio_frame.format);
202 void start_new_frame(const uint8_t *start)
204 uint16_t format = (start[3] << 8) | start[2];
205 uint16_t timecode = (start[1] << 8) | start[0];
207 if (current_video_frame.len > 0) {
209 queue_frame(format, timecode, current_video_frame, &pending_video_frames);
211 //printf("Found frame start, format 0x%04x timecode 0x%04x, previous frame length was %d/%d\n",
213 // //start[7], start[6], start[5], start[4],
214 // read_current_frame, FRAME_SIZE);
216 current_video_frame = video_frame_allocator->alloc_frame();
217 //if (current_video_frame.data == nullptr) {
218 // read_current_frame = -1;
220 // read_current_frame = 0;
224 void start_new_audio_block(const uint8_t *start)
226 uint16_t format = (start[3] << 8) | start[2];
227 uint16_t timecode = (start[1] << 8) | start[0];
228 if (current_audio_frame.len > 0) {
229 //dump_audio_block();
230 queue_frame(format, timecode, current_audio_frame, &pending_audio_frames);
232 //printf("Found audio block start, format 0x%04x timecode 0x%04x, previous block length was %d\n",
233 // format, timecode, read_current_audio_block);
234 current_audio_frame = audio_frame_allocator->alloc_frame();
238 static void dump_pack(const libusb_transfer *xfr, int offset, const libusb_iso_packet_descriptor *pack)
240 // printf("ISO pack%u length:%u, actual_length:%u, offset:%u\n", i, pack->length, pack->actual_length, offset);
241 for (unsigned j = 0; j < pack->actual_length; j++) {
242 //for (int j = 0; j < min(pack->actual_length, 16u); j++) {
243 printf("%02x", xfr->buffer[j + offset]);
246 else if ((j % 8) == 7)
254 void add_to_frame(FrameAllocator::Frame *current_frame, const char *frame_type_name, const uint8_t *start, const uint8_t *end)
256 if (current_frame->data == nullptr ||
257 current_frame->len > current_video_frame.size ||
262 int bytes = end - start;
263 if (current_frame->len + bytes > current_frame->size) {
264 printf("%d bytes overflow after last %s frame\n",
265 int(current_frame->len + bytes - current_frame->size), frame_type_name);
268 memcpy(current_frame->data + current_frame->len, start, bytes);
269 current_frame->len += bytes;
273 void decode_packs(const libusb_transfer *xfr,
274 const char *sync_pattern,
276 FrameAllocator::Frame *current_frame,
277 const char *frame_type_name,
278 function<void(const uint8_t *start)> start_callback)
281 for (int i = 0; i < xfr->num_iso_packets; i++) {
282 const libusb_iso_packet_descriptor *pack = &xfr->iso_packet_desc[i];
284 if (pack->status != LIBUSB_TRANSFER_COMPLETED) {
285 fprintf(stderr, "Error: pack %u/%u status %d\n", i, xfr->num_iso_packets, pack->status);
290 const unsigned char *iso_start = xfr->buffer + offset;
291 for (unsigned iso_offset = 0; iso_offset < pack->actual_length; ) { // Usually runs only one iteration.
292 const unsigned char* start_next_frame = (const unsigned char *)memmem(iso_start + iso_offset, pack->actual_length - iso_offset, sync_pattern, sync_length);
293 if (start_next_frame == nullptr) {
294 // add the rest of the buffer
295 const uint8_t *start = iso_start + iso_offset;
296 const uint8_t *end = iso_start + pack->actual_length;
297 add_to_frame(current_frame, frame_type_name, start, end);
300 const uint8_t *start = iso_start + iso_offset;
301 const uint8_t *end = start_next_frame;
302 add_to_frame(current_frame, frame_type_name, start, end);
303 start_callback(start_next_frame + sync_length);
305 int suboffset = start_next_frame - iso_start;
306 iso_offset = suboffset + sync_length; // skip sync
310 dump_pack(xfr, offset, pack);
312 offset += pack->length;
316 static void cb_xfr(struct libusb_transfer *xfr)
318 if (xfr->status != LIBUSB_TRANSFER_COMPLETED) {
319 fprintf(stderr, "transfer status %d\n", xfr->status);
320 libusb_free_transfer(xfr);
324 if (xfr->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) {
325 if (xfr->endpoint == 0x84) {
326 decode_packs(xfr, "DeckLinkAudioResyncT", 20, ¤t_audio_frame, "audio", start_new_audio_block);
328 decode_packs(xfr, "\x00\x00\xff\xff", 4, ¤t_video_frame, "video", start_new_frame);
331 if (xfr->type == LIBUSB_TRANSFER_TYPE_CONTROL) {
332 //const libusb_control_setup *setup = libusb_control_transfer_get_setup(xfr);
333 uint8_t *buf = libusb_control_transfer_get_data(xfr);
335 if (setup->wIndex == 44) {
336 printf("read timer register: 0x%02x%02x%02x%02x\n", buf[0], buf[1], buf[2], buf[3]);
338 printf("read register %2d: 0x%02x%02x%02x%02x\n",
339 setup->wIndex, buf[0], buf[1], buf[2], buf[3]);
342 memcpy(register_file + current_register, buf, 4);
343 current_register = (current_register + 4) % NUM_REGISTERS;
344 if (current_register == 0) {
345 // read through all of them
346 printf("register dump:");
347 for (int i = 0; i < NUM_REGISTERS; i += 4) {
348 printf(" 0x%02x%02x%02x%02x", register_file[i], register_file[i + 1], register_file[i + 2], register_file[i + 3]);
352 libusb_fill_control_setup(xfr->buffer,
353 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
354 /*index=*/current_register, /*length=*/4);
359 printf("length:%u, actual_length:%u\n", xfr->length, xfr->actual_length);
360 for (i = 0; i < xfr->actual_length; i++) {
361 printf("%02x", xfr->buffer[i]);
371 if (libusb_submit_transfer(xfr) < 0) {
372 fprintf(stderr, "error re-submitting URB\n");
377 void usb_thread_func()
379 printf("usb thread started\n");
382 memset(¶m, 0, sizeof(param));
383 param.sched_priority = 1;
384 if (sched_setscheduler(0, SCHED_RR, ¶m) == -1) {
385 printf("couldn't set realtime priority for USB thread: %s\n", strerror(errno));
387 while (!should_quit) {
388 int rc = libusb_handle_events(nullptr);
389 if (rc != LIBUSB_SUCCESS)
394 FrameAllocator *get_video_frame_allocator()
396 return video_frame_allocator;
399 void set_video_frame_allocator(FrameAllocator *allocator)
401 video_frame_allocator = allocator;
404 FrameAllocator *get_audio_frame_allocator()
406 return audio_frame_allocator;
409 void set_audio_frame_allocator(FrameAllocator *allocator)
411 audio_frame_allocator = allocator;
414 void set_frame_callback(frame_callback_t callback)
416 frame_callback = callback;
419 void start_bm_capture()
421 if (video_frame_allocator == nullptr) {
422 set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE)); // FIXME: leak.
424 if (audio_frame_allocator == nullptr) {
425 set_audio_frame_allocator(new MallocFrameAllocator(65536)); // FIXME: leak.
427 thread(dequeue_thread).detach();
430 struct libusb_transfer *xfr;
431 vector<libusb_transfer *> iso_xfrs;
433 rc = libusb_init(nullptr);
435 fprintf(stderr, "Error initializing libusb: %s\n", libusb_error_name(rc));
439 struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, 0x1edb, 0xbd3b);
441 fprintf(stderr, "Error finding USB device\n");
445 libusb_config_descriptor *config;
446 rc = libusb_get_config_descriptor(libusb_get_device(devh), /*config_index=*/0, &config);
448 fprintf(stderr, "Error getting configuration: %s\n", libusb_error_name(rc));
451 printf("%d interface\n", config->bNumInterfaces);
452 for (int interface_number = 0; interface_number < config->bNumInterfaces; ++interface_number) {
453 printf(" interface %d\n", interface_number);
454 const libusb_interface *interface = &config->interface[interface_number];
455 for (int altsetting = 0; altsetting < interface->num_altsetting; ++altsetting) {
456 printf(" alternate setting %d\n", altsetting);
457 const libusb_interface_descriptor *interface_desc = &interface->altsetting[altsetting];
458 for (int endpoint_number = 0; endpoint_number < interface_desc->bNumEndpoints; ++endpoint_number) {
459 const libusb_endpoint_descriptor *endpoint = &interface_desc->endpoint[endpoint_number];
460 printf(" endpoint address 0x%02x\n", endpoint->bEndpointAddress);
465 rc = libusb_set_configuration(devh, /*configuration=*/1);
467 fprintf(stderr, "Error setting configuration 1: %s\n", libusb_error_name(rc));
471 rc = libusb_claim_interface(devh, 0);
473 fprintf(stderr, "Error claiming interface 0: %s\n", libusb_error_name(rc));
477 // Alternate setting 1 is output, alternate setting 2 is input.
478 // Card is reset when switching alternates, so the driver uses
479 // this “double switch” when it wants to reset.
480 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
482 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
485 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/2);
487 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
491 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
493 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
499 rc = libusb_claim_interface(devh, 3);
501 fprintf(stderr, "Error claiming interface 3: %s\n", libusb_error_name(rc));
507 // 44 is some kind of timer register (first 16 bits count upwards)
508 // 24 is some sort of watchdog?
509 // you can seemingly set it to 0x73c60001 and that bit will eventually disappear
510 // (or will go to 0x73c60010?), also seen 0x73c60100
511 // 12 also changes all the time, unclear why
512 // 16 seems to be autodetected mode somehow
513 // -- this is e00115e0 after reset?
514 // ed0115e0 after mode change [to output?]
515 // 2d0015e0 after more mode change [to input]
516 // ed0115e0 after more mode change
517 // 2d0015e0 after more mode change
519 // 390115e0 seems to indicate we have signal
520 // changes to 200115e0 when resolution changes/we lose signal, driver resets after a while
522 // 200015e0 on startup
523 // changes to 250115e0 when we sync to the signal
525 // so only first 16 bits count, and 0x0100 is a mask for ok/stable signal?
527 // 28 and 32 seems to be analog audio input levels (one byte for each of the eight channels).
528 // however, if setting 32 with HDMI embedded audio, it is immediately overwritten back (to 0xe137002a).
530 // 4, 8, 20 are unclear. seem to be some sort of bitmask, but we can set them to 0 with no apparent effect.
531 // perhaps some of them are related to analog output?
533 // 36 can be set to 0 with no apparent effect (all of this tested on both video and audio),
534 // but the driver sets it to 0x8036802a at some point.
537 // first byte is 0x39 for a stable 576p60 signal, 0x2d for a stable 720p60 signal, 0x20 for no signal
540 // 0x01 - stable signal
542 // 0x08 - unknown (audio??)
552 static const ctrl ctrls[] = {
553 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
554 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
555 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
556 { LIBUSB_ENDPOINT_IN, 214, 4, 0 },
557 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
558 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
559 { LIBUSB_ENDPOINT_IN, 214, 20, 0 },
560 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
561 { LIBUSB_ENDPOINT_IN, 214, 28, 0 },
562 { LIBUSB_ENDPOINT_IN, 215, 32, 0 },
563 { LIBUSB_ENDPOINT_IN, 214, 36, 0 },
564 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
565 { LIBUSB_ENDPOINT_IN, 216, 44, 0 },
566 { LIBUSB_ENDPOINT_IN, 214, 48, 0 },
567 { LIBUSB_ENDPOINT_IN, 214, 52, 0 },
568 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
569 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
570 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
571 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
572 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
573 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
574 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
575 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
576 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
577 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
578 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
579 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
580 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
581 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
582 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
583 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
584 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
585 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
586 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
587 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
588 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
589 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
590 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
591 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
592 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
593 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
594 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
595 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
596 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
597 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
598 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
599 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
600 { LIBUSB_ENDPOINT_IN, 214, 12, 0 }, // packet 354
601 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
602 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
603 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
604 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
606 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x80000100 },
607 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 }, // wow, some kind of mode
609 // seems to capture on HDMI, clearing the 0x20000000 bit seems to activate 10-bit
611 // clearing the 0x08000000 bit seems to change the capture format (other source?)
612 // 0x10000000 = analog audio instead of embedded audio, it seems
613 // 0x3a000000 = component video? (analog audio)
614 // 0x3c000000 = composite video? (analog audio)
615 // 0x3e000000 = s-video? (analog audio)
616 { LIBUSB_ENDPOINT_OUT, 215, 0, 0x29000000 },
617 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 },
619 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0xffffffff },
620 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0xffffffff },
621 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x40404040 },
622 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x40404040 },
623 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x8036802a },
624 { LIBUSB_ENDPOINT_OUT, 215, 24, 0x73c60001 }, // latch for frame start?
625 //{ LIBUSB_ENDPOINT_OUT, 215, 24, 0x13370001 }, // latch for frame start?
626 { LIBUSB_ENDPOINT_IN, 214, 24, 0 }, //
627 //{ LIBUSB_ENDPOINT_OUT, 215, 4, 0x00000000 }, // appears to have no e fect
628 //{ LIBUSB_ENDPOINT_OUT, 215, 8, 0x00000000 }, // appears to have no effect
629 //{ LIBUSB_ENDPOINT_OUT, 215, 20, 0x00000000 }, // appears to have no effect
630 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x00000000 }, // appears to have no effect
631 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x00000000 }, // appears to have no effect
632 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x00000000 }, // appears to have no effect
634 { LIBUSB_ENDPOINT_OUT, 215, 0 },
635 { LIBUSB_ENDPOINT_OUT, 215, 0 },
636 { LIBUSB_ENDPOINT_OUT, 215, 28 },
637 { LIBUSB_ENDPOINT_OUT, 215, 32 },
638 { LIBUSB_ENDPOINT_OUT, 215, 36 },
639 { LIBUSB_ENDPOINT_OUT, 215, 24 },
640 { LIBUSB_ENDPOINT_OUT, 215, 24 },
641 { LIBUSB_ENDPOINT_OUT, 215, 24 },
642 { LIBUSB_ENDPOINT_OUT, 215, 24 },
643 { LIBUSB_ENDPOINT_OUT, 215, 24 },
644 { LIBUSB_ENDPOINT_OUT, 215, 24 },
645 { LIBUSB_ENDPOINT_OUT, 215, 24 },
646 { LIBUSB_ENDPOINT_OUT, 215, 24 },
647 { LIBUSB_ENDPOINT_OUT, 215, 24 },
648 { LIBUSB_ENDPOINT_OUT, 215, 24 },
649 { LIBUSB_ENDPOINT_OUT, 215, 0 },
650 { LIBUSB_ENDPOINT_OUT, 215, 24 },
651 { LIBUSB_ENDPOINT_OUT, 215, 24 },
652 { LIBUSB_ENDPOINT_OUT, 215, 24 },
653 { LIBUSB_ENDPOINT_OUT, 215, 24 },
654 { LIBUSB_ENDPOINT_OUT, 215, 24 },
655 { LIBUSB_ENDPOINT_OUT, 215, 24 },
659 for (unsigned req = 0; req < sizeof(ctrls) / sizeof(ctrls[0]); ++req) {
660 uint32_t flipped = htonl(ctrls[req].data);
661 static uint8_t value[4];
662 memcpy(value, &flipped, sizeof(flipped));
663 int size = sizeof(value);
664 //if (ctrls[req].request == 215) size = 0;
665 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | ctrls[req].endpoint,
666 /*request=*/ctrls[req].request, /*value=*/0, /*index=*/ctrls[req].index, value, size, /*timeout=*/0);
668 fprintf(stderr, "Error on control %d: %s\n", ctrls[req].index, libusb_error_name(rc));
672 printf("rc=%d: ep=%d@%d %d -> 0x", rc, ctrls[req].endpoint, ctrls[req].request, ctrls[req].index);
673 for (int i = 0; i < rc; ++i) {
674 printf("%02x", value[i]);
682 static int my_index = 0;
683 static uint8_t value[4];
684 int size = sizeof(value);
685 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
686 /*request=*/214, /*value=*/0, /*index=*/my_index, value, size, /*timeout=*/0);
688 fprintf(stderr, "Error on control\n");
691 printf("rc=%d index=%d: 0x", rc, my_index);
692 for (int i = 0; i < rc; ++i) {
693 printf("%02x", value[i]);
700 // set up an asynchronous transfer of the timer register
701 static uint8_t cmdbuf[LIBUSB_CONTROL_SETUP_SIZE + 4];
702 static int completed = 0;
704 xfr = libusb_alloc_transfer(0);
705 libusb_fill_control_setup(cmdbuf,
706 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
707 /*index=*/44, /*length=*/4);
708 libusb_fill_control_transfer(xfr, devh, cmdbuf, cb_xfr, &completed, 0);
709 libusb_submit_transfer(xfr);
711 // set up an asynchronous transfer of register 24
712 static uint8_t cmdbuf2[LIBUSB_CONTROL_SETUP_SIZE + 4];
713 static int completed2 = 0;
715 xfr = libusb_alloc_transfer(0);
716 libusb_fill_control_setup(cmdbuf2,
717 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
718 /*index=*/24, /*length=*/4);
719 libusb_fill_control_transfer(xfr, devh, cmdbuf2, cb_xfr, &completed2, 0);
720 libusb_submit_transfer(xfr);
723 // set up an asynchronous transfer of the register dump
724 static uint8_t cmdbuf3[LIBUSB_CONTROL_SETUP_SIZE + 4];
725 static int completed3 = 0;
727 xfr = libusb_alloc_transfer(0);
728 libusb_fill_control_setup(cmdbuf3,
729 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
730 /*index=*/current_register, /*length=*/4);
731 libusb_fill_control_transfer(xfr, devh, cmdbuf3, cb_xfr, &completed3, 0);
732 //libusb_submit_transfer(xfr);
734 audiofp = fopen("audio.raw", "wb");
736 // set up isochronous transfers for audio and video
737 for (int e = 3; e <= 4; ++e) {
738 //int num_transfers = (e == 3) ? 6 : 6;
739 int num_transfers = 6;
740 for (int i = 0; i < num_transfers; ++i) {
741 int num_iso_pack, size;
743 // Video seems to require isochronous packets scaled with the width;
744 // seemingly six lines is about right, rounded up to the required 1kB
746 size = WIDTH * 2 * 6;
747 // Note that for 10-bit input, you'll need to increase size accordingly.
748 //size = size * 4 / 3;
749 if (size % 1024 != 0) {
753 num_iso_pack = (2 << 20) / size; // 2 MB.
754 printf("Picking %d packets of 0x%x bytes each\n", num_iso_pack, size);
759 int num_bytes = num_iso_pack * size;
760 uint8_t *buf = new uint8_t[num_bytes];
762 xfr = libusb_alloc_transfer(num_iso_pack);
764 fprintf(stderr, "oom\n");
768 int ep = LIBUSB_ENDPOINT_IN | e;
769 libusb_fill_iso_transfer(xfr, devh, ep, buf, num_bytes,
770 num_iso_pack, cb_xfr, nullptr, 0);
771 libusb_set_iso_packet_lengths(xfr, size);
772 iso_xfrs.push_back(xfr);
778 for (libusb_transfer *xfr : iso_xfrs) {
779 rc = libusb_submit_transfer(xfr);
782 //printf("num_bytes=%d\n", num_bytes);
783 fprintf(stderr, "Error submitting iso to endpoint 0x%02x, number %d: %s\n",
784 xfr->endpoint, i, libusb_error_name(rc));
790 usb_thread = thread(usb_thread_func);
794 libusb_release_interface(devh, 0);
798 libusb_exit(nullptr);
803 void stop_bm_capture()