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>
28 static int current_register = 0;
30 #define NUM_REGISTERS 60
31 uint8_t register_file[NUM_REGISTERS];
34 #define HEIGHT 750 /* 30 lines ancillary data? */
36 //#define HEIGHT 1125 /* ??? lines ancillary data? */
37 #define HEADER_SIZE 44
38 //#define HEADER_SIZE 0
39 #define AUDIO_HEADER_SIZE 4
41 //#define FRAME_SIZE (WIDTH * HEIGHT * 2 + HEADER_SIZE) // UYVY
42 //#define FRAME_SIZE (WIDTH * HEIGHT * 2 * 4 / 3 + HEADER_SIZE) // v210
43 #define FRAME_SIZE (8 << 20)
47 FrameAllocator::Frame current_video_frame;
48 FrameAllocator::Frame current_audio_frame;
53 FrameAllocator::Frame frame;
57 condition_variable queues_not_empty;
58 deque<QueuedFrame> pending_video_frames;
59 deque<QueuedFrame> pending_audio_frames;
61 FrameAllocator::~FrameAllocator() {}
63 #define NUM_QUEUED_FRAMES 8
64 class MallocFrameAllocator : public FrameAllocator {
66 MallocFrameAllocator(size_t frame_size);
67 Frame alloc_frame() override;
68 void release_frame(Frame frame) override;
74 stack<unique_ptr<uint8_t[]>> freelist; // All of size <frame_size>.
77 MallocFrameAllocator::MallocFrameAllocator(size_t frame_size)
78 : frame_size(frame_size)
80 for (int i = 0; i < NUM_QUEUED_FRAMES; ++i) {
81 freelist.push(unique_ptr<uint8_t[]>(new uint8_t[frame_size]));
85 FrameAllocator::Frame MallocFrameAllocator::alloc_frame()
90 unique_lock<mutex> lock(freelist_mutex); // Meh.
91 if (freelist.empty()) {
92 printf("Frame overrun (no more spare frames of size %ld), dropping frame!\n",
95 vf.data = freelist.top().release();
97 freelist.pop(); // Meh.
102 void MallocFrameAllocator::release_frame(Frame frame)
104 unique_lock<mutex> lock(freelist_mutex);
105 freelist.push(unique_ptr<uint8_t[]>(frame.data));
108 FrameAllocator *video_frame_allocator = nullptr;
109 FrameAllocator *audio_frame_allocator = nullptr;
110 frame_callback_t frame_callback = nullptr;
112 bool uint16_less_than_with_wraparound(uint16_t a, uint16_t b)
117 return (b - a < 0x8000);
119 int wrap_b = 0x10000 + int(b);
120 return (wrap_b - a < 0x8000);
124 void queue_frame(uint16_t format, uint16_t timecode, FrameAllocator::Frame frame, deque<QueuedFrame> *q)
126 if (!q->empty() && !uint16_less_than_with_wraparound(q->back().timecode, timecode)) {
127 printf("Blocks going backwards: prev=0x%04x, cur=0x%04x (dropped)\n",
128 q->back().timecode, timecode);
129 frame.owner->release_frame(frame);
135 qf.timecode = timecode;
139 unique_lock<mutex> lock(queue_lock);
140 q->push_back(move(qf));
142 queues_not_empty.notify_one(); // might be spurious
145 void dump_frame(const char *filename, uint8_t *frame_start, size_t frame_len)
147 FILE *fp = fopen(filename, "wb");
148 if (fwrite(frame_start + HEADER_SIZE, frame_len - HEADER_SIZE, 1, fp) != 1) {
149 printf("short write!\n");
154 void dump_audio_block(uint8_t *audio_start, size_t audio_len)
156 fwrite(audio_start + AUDIO_HEADER_SIZE, 1, audio_len - AUDIO_HEADER_SIZE, audiofp);
159 void dequeue_thread()
162 unique_lock<mutex> lock(queue_lock);
163 queues_not_empty.wait(lock, []{ return !pending_video_frames.empty() && !pending_audio_frames.empty(); });
165 uint16_t video_timecode = pending_video_frames.front().timecode;
166 uint16_t audio_timecode = pending_audio_frames.front().timecode;
167 if (video_timecode < audio_timecode) {
168 printf("Video block 0x%04x without corresponding audio block, dropping.\n",
170 video_frame_allocator->release_frame(pending_video_frames.front().frame);
171 pending_video_frames.pop_front();
172 } else if (audio_timecode < video_timecode) {
173 printf("Audio block 0x%04x without corresponding video block, dropping.\n",
175 audio_frame_allocator->release_frame(pending_audio_frames.front().frame);
176 pending_audio_frames.pop_front();
178 QueuedFrame video_frame = pending_video_frames.front();
179 QueuedFrame audio_frame = pending_audio_frames.front();
180 pending_audio_frames.pop_front();
181 pending_video_frames.pop_front();
186 snprintf(filename, sizeof(filename), "%04x%04x.uyvy", video_frame.format, video_timecode);
187 dump_frame(filename, video_frame.frame.data, video_frame.data_len);
188 dump_audio_block(audio_frame.frame.data, audio_frame.data_len);
191 frame_callback(video_timecode,
192 video_frame.frame, HEADER_SIZE, video_frame.format,
193 audio_frame.frame, AUDIO_HEADER_SIZE, audio_frame.format);
198 void add_current_frame(const uint8_t *start, const uint8_t *end)
200 if (current_video_frame.data == nullptr ||
201 current_video_frame.len > current_video_frame.size) return;
202 if (start == end) return;
204 int bytes = end - start;
205 if (current_video_frame.len + bytes > current_video_frame.size) {
206 printf("%d bytes overflow after last video frame\n", current_video_frame.len + bytes - current_video_frame.size);
209 memcpy(current_video_frame.data + current_video_frame.len, start, bytes);
210 current_video_frame.len += bytes;
214 void start_new_frame(const uint8_t *start)
216 uint16_t format = (start[3] << 8) | start[2];
217 uint16_t timecode = (start[1] << 8) | start[0];
219 if (current_video_frame.len > 0) {
221 queue_frame(format, timecode, current_video_frame, &pending_video_frames);
223 //printf("Found frame start, format 0x%04x timecode 0x%04x, previous frame length was %d/%d\n",
225 // //start[7], start[6], start[5], start[4],
226 // read_current_frame, FRAME_SIZE);
228 current_video_frame = video_frame_allocator->alloc_frame();
229 //if (current_video_frame.data == nullptr) {
230 // read_current_frame = -1;
232 // read_current_frame = 0;
236 void add_current_audio(const uint8_t *start, const uint8_t *end)
238 if (current_audio_frame.data == nullptr ||
239 current_audio_frame.len > current_audio_frame.size) return;
240 if (start == end) return;
242 int bytes = end - start;
243 if (current_audio_frame.len + bytes > current_audio_frame.size) {
244 printf("%d bytes overflow after last audio block\n", current_audio_frame.len + bytes - current_audio_frame.size);
245 //dump_audio_block();
247 memcpy(current_audio_frame.data + current_audio_frame.len, start, bytes);
248 current_audio_frame.len += bytes;
252 void start_new_audio_block(const uint8_t *start)
254 uint16_t format = (start[3] << 8) | start[2];
255 uint16_t timecode = (start[1] << 8) | start[0];
256 if (current_audio_frame.len > 0) {
257 //dump_audio_block();
258 queue_frame(format, timecode, current_audio_frame, &pending_audio_frames);
260 //printf("Found audio block start, format 0x%04x timecode 0x%04x, previous block length was %d\n",
261 // format, timecode, read_current_audio_block);
262 current_audio_frame = audio_frame_allocator->alloc_frame();
265 static void dump_pack(const libusb_transfer *xfr, int offset, const libusb_iso_packet_descriptor *pack)
267 // printf("ISO pack%u length:%u, actual_length:%u, offset:%u\n", i, pack->length, pack->actual_length, offset);
268 for (int j = 0; j < pack->actual_length; j++) {
269 //for (int j = 0; j < min(pack->actual_length, 16u); j++) {
270 printf("%02x", xfr->buffer[j + offset]);
273 else if ((j % 8) == 7)
280 void decode_packs(const libusb_transfer *xfr, const char *sync_pattern, int sync_length, function<void(const uint8_t *start, const uint8_t *end)> add_callback, function<void(const uint8_t *start)> start_callback)
283 for (unsigned i = 0; i < xfr->num_iso_packets; i++) {
284 const libusb_iso_packet_descriptor *pack = &xfr->iso_packet_desc[i];
286 if (pack->status != LIBUSB_TRANSFER_COMPLETED) {
287 fprintf(stderr, "Error: pack %u/%u status %d\n", i, xfr->num_iso_packets, pack->status);
292 const unsigned char *iso_start = xfr->buffer + offset;
293 for (int iso_offset = 0; iso_offset < pack->actual_length; ) { // Usually runs only one iteration.
294 const unsigned char* start_next_frame = (const unsigned char *)memmem(iso_start + iso_offset, pack->actual_length - iso_offset, sync_pattern, sync_length);
295 if (start_next_frame == nullptr) {
296 // add the rest of the buffer
297 add_callback(iso_start + iso_offset, iso_start + pack->actual_length);
300 add_callback(iso_start + iso_offset, start_next_frame);
301 start_callback(start_next_frame + sync_length);
303 int suboffset = start_next_frame - iso_start;
304 iso_offset = suboffset + sync_length; // skip sync
308 dump_pack(xfr, offset, pack);
310 offset += pack->length;
314 static void cb_xfr(struct libusb_transfer *xfr)
316 if (xfr->status != LIBUSB_TRANSFER_COMPLETED) {
317 fprintf(stderr, "transfer status %d\n", xfr->status);
318 libusb_free_transfer(xfr);
322 if (xfr->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) {
323 if (xfr->endpoint == 0x84) {
324 decode_packs(xfr, "DeckLinkAudioResyncT", 20, add_current_audio, start_new_audio_block);
326 decode_packs(xfr, "\x00\x00\xff\xff", 4, add_current_frame, start_new_frame);
329 if (xfr->type == LIBUSB_TRANSFER_TYPE_CONTROL) {
330 const libusb_control_setup *setup = libusb_control_transfer_get_setup(xfr);
331 uint8_t *buf = libusb_control_transfer_get_data(xfr);
333 if (setup->wIndex == 44) {
334 printf("read timer register: 0x%02x%02x%02x%02x\n", buf[0], buf[1], buf[2], buf[3]);
336 printf("read register %2d: 0x%02x%02x%02x%02x\n",
337 setup->wIndex, buf[0], buf[1], buf[2], buf[3]);
340 memcpy(register_file + current_register, buf, 4);
341 current_register = (current_register + 4) % NUM_REGISTERS;
342 if (current_register == 0) {
343 // read through all of them
344 printf("register dump:");
345 for (int i = 0; i < NUM_REGISTERS; i += 4) {
346 printf(" 0x%02x%02x%02x%02x", register_file[i], register_file[i + 1], register_file[i + 2], register_file[i + 3]);
350 libusb_fill_control_setup(xfr->buffer,
351 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
352 /*index=*/current_register, /*length=*/4);
357 printf("length:%u, actual_length:%u\n", xfr->length, xfr->actual_length);
358 for (i = 0; i < xfr->actual_length; i++) {
359 printf("%02x", xfr->buffer[i]);
370 if (libusb_submit_transfer(xfr) < 0) {
371 fprintf(stderr, "error re-submitting URB\n");
378 printf("usb thread started\n");
381 memset(¶m, 0, sizeof(param));
382 param.sched_priority = 1;
383 if (sched_setscheduler(0, SCHED_RR, ¶m) == -1) {
384 printf("couldn't set realtime priority for USB thread: %s\n", strerror(errno));
387 int rc = libusb_handle_events(nullptr);
388 if (rc != LIBUSB_SUCCESS)
393 FrameAllocator *get_video_frame_allocator()
395 return video_frame_allocator;
398 void set_video_frame_allocator(FrameAllocator *allocator)
400 video_frame_allocator = allocator;
403 FrameAllocator *get_audio_frame_allocator()
405 return audio_frame_allocator;
408 void set_audio_frame_allocator(FrameAllocator *allocator)
410 audio_frame_allocator = allocator;
413 void set_frame_callback(frame_callback_t callback)
415 frame_callback = callback;
418 void start_bm_capture()
420 if (video_frame_allocator == nullptr) {
421 set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE)); // FIXME: leak.
423 if (audio_frame_allocator == nullptr) {
424 set_audio_frame_allocator(new MallocFrameAllocator(65536)); // FIXME: leak.
426 thread(dequeue_thread).detach();
429 struct libusb_transfer *xfr;
430 vector<libusb_transfer *> iso_xfrs;
432 rc = libusb_init(nullptr);
434 fprintf(stderr, "Error initializing libusb: %s\n", libusb_error_name(rc));
438 struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, 0x1edb, 0xbd3b);
440 fprintf(stderr, "Error finding USB device\n");
444 libusb_config_descriptor *config;
445 rc = libusb_get_config_descriptor(libusb_get_device(devh), /*config_index=*/0, &config);
447 fprintf(stderr, "Error getting configuration: %s\n", libusb_error_name(rc));
450 printf("%d interface\n", config->bNumInterfaces);
451 for (int interface_number = 0; interface_number < config->bNumInterfaces; ++interface_number) {
452 printf(" interface %d\n", interface_number);
453 const libusb_interface *interface = &config->interface[interface_number];
454 for (int altsetting = 0; altsetting < interface->num_altsetting; ++altsetting) {
455 printf(" alternate setting %d\n", altsetting);
456 const libusb_interface_descriptor *interface_desc = &interface->altsetting[altsetting];
457 for (int endpoint_number = 0; endpoint_number < interface_desc->bNumEndpoints; ++endpoint_number) {
458 const libusb_endpoint_descriptor *endpoint = &interface_desc->endpoint[endpoint_number];
459 printf(" endpoint address 0x%02x\n", endpoint->bEndpointAddress);
464 rc = libusb_set_configuration(devh, /*configuration=*/1);
466 fprintf(stderr, "Error setting configuration 1: %s\n", libusb_error_name(rc));
470 rc = libusb_claim_interface(devh, 0);
472 fprintf(stderr, "Error claiming interface 0: %s\n", libusb_error_name(rc));
476 // Alternate setting 1 is output, alternate setting 2 is input.
477 // Card is reset when switching alternates, so the driver uses
478 // this “double switch” when it wants to reset.
479 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
481 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
484 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/2);
486 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
490 rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
492 fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
498 rc = libusb_claim_interface(devh, 3);
500 fprintf(stderr, "Error claiming interface 3: %s\n", libusb_error_name(rc));
506 // 44 is some kind of timer register (first 16 bits count upwards)
507 // 24 is some sort of watchdog?
508 // you can seemingly set it to 0x73c60001 and that bit will eventually disappear
509 // (or will go to 0x73c60010?), also seen 0x73c60100
510 // 12 also changes all the time, unclear why
511 // 16 seems to be autodetected mode somehow
512 // -- this is e00115e0 after reset?
513 // ed0115e0 after mode change [to output?]
514 // 2d0015e0 after more mode change [to input]
515 // ed0115e0 after more mode change
516 // 2d0015e0 after more mode change
518 // 390115e0 seems to indicate we have signal
519 // changes to 200115e0 when resolution changes/we lose signal, driver resets after a while
521 // 200015e0 on startup
522 // changes to 250115e0 when we sync to the signal
524 // so only first 16 bits count, and 0x0100 is a mask for ok/stable signal?
526 // 28 and 32 seems to be analog audio input levels (one byte for each of the eight channels).
527 // however, if setting 32 with HDMI embedded audio, it is immediately overwritten back (to 0xe137002a).
529 // 4, 8, 20 are unclear. seem to be some sort of bitmask, but we can set them to 0 with no apparent effect.
530 // perhaps some of them are related to analog output?
532 // 36 can be set to 0 with no apparent effect (all of this tested on both video and audio),
533 // but the driver sets it to 0x8036802a at some point.
536 // first byte is 0x39 for a stable 576p60 signal, 0x2d for a stable 720p60 signal, 0x20 for no signal
539 // 0x01 - stable signal
541 // 0x08 - unknown (audio??)
551 static const ctrl ctrls[] = {
552 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
553 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
554 { LIBUSB_ENDPOINT_IN, 214, 0, 0 },
555 { LIBUSB_ENDPOINT_IN, 214, 4, 0 },
556 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
557 { LIBUSB_ENDPOINT_IN, 214, 16, 0 },
558 { LIBUSB_ENDPOINT_IN, 214, 20, 0 },
559 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
560 { LIBUSB_ENDPOINT_IN, 214, 28, 0 },
561 { LIBUSB_ENDPOINT_IN, 215, 32, 0 },
562 { LIBUSB_ENDPOINT_IN, 214, 36, 0 },
563 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
564 { LIBUSB_ENDPOINT_IN, 216, 44, 0 },
565 { LIBUSB_ENDPOINT_IN, 214, 48, 0 },
566 { LIBUSB_ENDPOINT_IN, 214, 52, 0 },
567 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
568 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
569 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
570 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
571 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
572 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
573 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
574 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
575 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
576 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
577 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
578 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
579 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
580 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
581 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
582 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
583 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
584 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
585 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
586 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
587 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
588 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
589 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
590 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
591 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
592 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
593 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
594 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
595 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
596 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
597 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
598 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
599 { LIBUSB_ENDPOINT_IN, 214, 12, 0 }, // packet 354
600 { LIBUSB_ENDPOINT_IN, 214, 24, 0 },
601 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
602 { LIBUSB_ENDPOINT_IN, 214, 12, 0 },
603 { LIBUSB_ENDPOINT_IN, 214, 40, 0 },
605 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x80000100 },
606 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 }, // wow, some kind of mode
608 // seems to capture on HDMI, clearing the 0x20000000 bit seems to activate 10-bit
610 // clearing the 0x08000000 bit seems to change the capture format (other source?)
611 // 0x10000000 = analog audio instead of embedded audio, it seems
612 // 0x3a000000 = component video? (analog audio)
613 // 0x3c000000 = composite video? (analog audio)
614 // 0x3e000000 = s-video? (analog audio)
615 { LIBUSB_ENDPOINT_OUT, 215, 0, 0x29000000 },
616 //{ LIBUSB_ENDPOINT_OUT, 215, 0, 0x09000000 },
618 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0xffffffff },
619 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0xffffffff },
620 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x40404040 },
621 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x40404040 },
622 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x8036802a },
623 { LIBUSB_ENDPOINT_OUT, 215, 24, 0x73c60001 }, // latch for frame start?
624 //{ LIBUSB_ENDPOINT_OUT, 215, 24, 0x13370001 }, // latch for frame start?
625 { LIBUSB_ENDPOINT_IN, 214, 24, 0 }, //
626 //{ LIBUSB_ENDPOINT_OUT, 215, 4, 0x00000000 }, // appears to have no e fect
627 //{ LIBUSB_ENDPOINT_OUT, 215, 8, 0x00000000 }, // appears to have no effect
628 //{ LIBUSB_ENDPOINT_OUT, 215, 20, 0x00000000 }, // appears to have no effect
629 //{ LIBUSB_ENDPOINT_OUT, 215, 28, 0x00000000 }, // appears to have no effect
630 //{ LIBUSB_ENDPOINT_OUT, 215, 32, 0x00000000 }, // appears to have no effect
631 //{ LIBUSB_ENDPOINT_OUT, 215, 36, 0x00000000 }, // appears to have no effect
633 { LIBUSB_ENDPOINT_OUT, 215, 0 },
634 { LIBUSB_ENDPOINT_OUT, 215, 0 },
635 { LIBUSB_ENDPOINT_OUT, 215, 28 },
636 { LIBUSB_ENDPOINT_OUT, 215, 32 },
637 { LIBUSB_ENDPOINT_OUT, 215, 36 },
638 { LIBUSB_ENDPOINT_OUT, 215, 24 },
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, 0 },
649 { LIBUSB_ENDPOINT_OUT, 215, 24 },
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 },
658 for (int req = 0; req < sizeof(ctrls) / sizeof(ctrls[0]); ++req) {
659 uint32_t flipped = htonl(ctrls[req].data);
660 static uint8_t value[4];
661 memcpy(value, &flipped, sizeof(flipped));
662 int size = sizeof(value);
663 //if (ctrls[req].request == 215) size = 0;
664 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | ctrls[req].endpoint,
665 /*request=*/ctrls[req].request, /*value=*/0, /*index=*/ctrls[req].index, value, size, /*timeout=*/0);
667 fprintf(stderr, "Error on control %d: %s\n", ctrls[req].index, libusb_error_name(rc));
671 printf("rc=%d: ep=%d@%d %d -> 0x", rc, ctrls[req].endpoint, ctrls[req].request, ctrls[req].index);
672 for (int i = 0; i < rc; ++i) {
673 printf("%02x", value[i]);
681 static int my_index = 0;
682 static uint8_t value[4];
683 int size = sizeof(value);
684 rc = libusb_control_transfer(devh, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
685 /*request=*/214, /*value=*/0, /*index=*/my_index, value, size, /*timeout=*/0);
687 fprintf(stderr, "Error on control\n");
690 printf("rc=%d index=%d: 0x", rc, my_index);
691 for (int i = 0; i < rc; ++i) {
692 printf("%02x", value[i]);
699 // set up an asynchronous transfer of the timer register
700 static uint8_t cmdbuf[LIBUSB_CONTROL_SETUP_SIZE + 4];
701 static int completed = 0;
703 xfr = libusb_alloc_transfer(0);
704 libusb_fill_control_setup(cmdbuf,
705 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
706 /*index=*/44, /*length=*/4);
707 libusb_fill_control_transfer(xfr, devh, cmdbuf, cb_xfr, &completed, 0);
708 libusb_submit_transfer(xfr);
710 // set up an asynchronous transfer of register 24
711 static uint8_t cmdbuf2[LIBUSB_CONTROL_SETUP_SIZE + 4];
712 static int completed2 = 0;
714 xfr = libusb_alloc_transfer(0);
715 libusb_fill_control_setup(cmdbuf2,
716 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
717 /*index=*/24, /*length=*/4);
718 libusb_fill_control_transfer(xfr, devh, cmdbuf2, cb_xfr, &completed2, 0);
719 libusb_submit_transfer(xfr);
722 // set up an asynchronous transfer of the register dump
723 static uint8_t cmdbuf3[LIBUSB_CONTROL_SETUP_SIZE + 4];
724 static int completed3 = 0;
726 xfr = libusb_alloc_transfer(0);
727 libusb_fill_control_setup(cmdbuf3,
728 LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN, /*request=*/214, /*value=*/0,
729 /*index=*/current_register, /*length=*/4);
730 libusb_fill_control_transfer(xfr, devh, cmdbuf3, cb_xfr, &completed3, 0);
731 //libusb_submit_transfer(xfr);
733 audiofp = fopen("audio.raw", "wb");
735 // set up isochronous transfers for audio and video
736 for (int e = 3; e <= 4; ++e) {
737 //int num_transfers = (e == 3) ? 6 : 6;
738 int num_transfers = 6;
739 for (int i = 0; i < num_transfers; ++i) {
740 int num_iso_pack, size;
742 // Video seems to require isochronous packets scaled with the width;
743 // seemingly six lines is about right, rounded up to the required 1kB
745 size = WIDTH * 2 * 6;
746 // Note that for 10-bit input, you'll need to increase size accordingly.
747 //size = size * 4 / 3;
748 if (size % 1024 != 0) {
752 num_iso_pack = (2 << 20) / size; // 2 MB.
753 printf("Picking %d packets of 0x%x bytes each\n", num_iso_pack, size);
758 int num_bytes = num_iso_pack * size;
759 uint8_t *buf = new uint8_t[num_bytes];
761 xfr = libusb_alloc_transfer(num_iso_pack);
763 fprintf(stderr, "oom\n");
767 int ep = LIBUSB_ENDPOINT_IN | e;
768 libusb_fill_iso_transfer(xfr, devh, ep, buf, num_bytes,
769 num_iso_pack, cb_xfr, nullptr, 0);
770 libusb_set_iso_packet_lengths(xfr, size);
771 iso_xfrs.push_back(xfr);
777 for (libusb_transfer *xfr : iso_xfrs) {
778 rc = libusb_submit_transfer(xfr);
781 //printf("num_bytes=%d\n", num_bytes);
782 fprintf(stderr, "Error submitting iso to endpoint 0x%02x, number %d: %s\n",
783 xfr->endpoint, i, libusb_error_name(rc));
789 thread(usb_thread).detach();
793 libusb_release_interface(devh, 0);
797 libusb_exit(nullptr);