X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=bmusb.cpp;h=3d2c9f018488e202dff12e9439ebe8be665fa376;hb=5b54cc5acb28f5d2071c99ef7a715044aa30f10c;hp=16da5f01e467409188f4cb3ab92335631802d401;hpb=64568304a31f00588d7cd69d6edfb574a5fe3ad8;p=bmusb diff --git a/bmusb.cpp b/bmusb.cpp index 16da5f0..3d2c9f0 100644 --- a/bmusb.cpp +++ b/bmusb.cpp @@ -28,48 +28,62 @@ #include #include #include +#include #include using namespace std; using namespace std::placeholders; -#define WIDTH 1280 -#define HEIGHT 750 /* 30 lines ancillary data? */ -//#define WIDTH 1920 -//#define HEIGHT 1125 /* ??? lines ancillary data? */ +#define MIN_WIDTH 640 #define HEADER_SIZE 44 //#define HEADER_SIZE 0 #define AUDIO_HEADER_SIZE 4 -//#define FRAME_SIZE (WIDTH * HEIGHT * 2 + HEADER_SIZE) // UYVY -//#define FRAME_SIZE (WIDTH * HEIGHT * 2 * 4 / 3 + HEADER_SIZE) // v210 -#define FRAME_SIZE (8 << 20) +#define FRAME_SIZE (8 << 20) // 8 MB. +#define USB_VIDEO_TRANSFER_SIZE (128 << 10) // 128 kB. + +namespace { FILE *audiofp; thread usb_thread; atomic should_quit; -FrameAllocator::~FrameAllocator() {} +int find_xfer_size_for_width(int width) +{ + // Video seems to require isochronous packets scaled with the width; + // seemingly six lines is about right, rounded up to the required 1kB + // multiple. + int size = width * 2 * 6; + // Note that for 10-bit input, you'll need to increase size accordingly. + //size = size * 4 / 3; + if (size % 1024 != 0) { + size &= ~1023; + size += 1024; + } + return size; +} -#define NUM_QUEUED_FRAMES 8 -class MallocFrameAllocator : public FrameAllocator { -public: - MallocFrameAllocator(size_t frame_size); - Frame alloc_frame() override; - void release_frame(Frame frame) override; +void change_xfer_size_for_width(int width, libusb_transfer *xfr) +{ + assert(width >= MIN_WIDTH); + size_t size = find_xfer_size_for_width(width); + int num_iso_pack = xfr->length / size; + if (num_iso_pack != xfr->num_iso_packets || + size != xfr->iso_packet_desc[0].length) { + xfr->num_iso_packets = num_iso_pack; + libusb_set_iso_packet_lengths(xfr, size); + } +} -private: - size_t frame_size; +} // namespace - mutex freelist_mutex; - stack> freelist; // All of size . -}; +FrameAllocator::~FrameAllocator() {} -MallocFrameAllocator::MallocFrameAllocator(size_t frame_size) +MallocFrameAllocator::MallocFrameAllocator(size_t frame_size, size_t num_queued_frames) : frame_size(frame_size) { - for (int i = 0; i < NUM_QUEUED_FRAMES; ++i) { + for (size_t i = 0; i < num_queued_frames; ++i) { freelist.push(unique_ptr(new uint8_t[frame_size])); } } @@ -93,6 +107,9 @@ FrameAllocator::Frame MallocFrameAllocator::alloc_frame() void MallocFrameAllocator::release_frame(Frame frame) { + if (frame.overflow > 0) { + printf("%d bytes overflow after last (malloc) frame\n", int(frame.overflow)); + } unique_lock lock(freelist_mutex); freelist.push(unique_ptr(frame.data)); } @@ -111,6 +128,7 @@ bool uint16_less_than_with_wraparound(uint16_t a, uint16_t b) void BMUSBCapture::queue_frame(uint16_t format, uint16_t timecode, FrameAllocator::Frame frame, deque *q) { + unique_lock lock(queue_lock); if (!q->empty() && !uint16_less_than_with_wraparound(q->back().timecode, timecode)) { printf("Blocks going backwards: prev=0x%04x, cur=0x%04x (dropped)\n", q->back().timecode, timecode); @@ -122,11 +140,7 @@ void BMUSBCapture::queue_frame(uint16_t format, uint16_t timecode, FrameAllocato qf.format = format; qf.timecode = timecode; qf.frame = frame; - - { - unique_lock lock(queue_lock); - q->push_back(move(qf)); - } + q->push_back(move(qf)); queues_not_empty.notify_one(); // might be spurious } @@ -144,24 +158,45 @@ void dump_audio_block(uint8_t *audio_start, size_t audio_len) fwrite(audio_start + AUDIO_HEADER_SIZE, 1, audio_len - AUDIO_HEADER_SIZE, audiofp); } -void BMUSBCapture::dequeue_thread() +void BMUSBCapture::dequeue_thread_func() { - for ( ;; ) { + if (has_dequeue_callbacks) { + dequeue_init_callback(); + } + while (!dequeue_thread_should_quit) { unique_lock lock(queue_lock); - queues_not_empty.wait(lock, [this]{ return !pending_video_frames.empty() && !pending_audio_frames.empty(); }); + queues_not_empty.wait(lock, [this]{ return dequeue_thread_should_quit || (!pending_video_frames.empty() && !pending_audio_frames.empty()); }); + + if (dequeue_thread_should_quit) break; uint16_t video_timecode = pending_video_frames.front().timecode; uint16_t audio_timecode = pending_audio_frames.front().timecode; - if (video_timecode < audio_timecode) { + AudioFormat audio_format; + audio_format.bits_per_sample = 24; + audio_format.num_channels = 8; + if (uint16_less_than_with_wraparound(video_timecode, audio_timecode)) { printf("Video block 0x%04x without corresponding audio block, dropping.\n", video_timecode); - video_frame_allocator->release_frame(pending_video_frames.front().frame); + QueuedFrame video_frame = pending_video_frames.front(); pending_video_frames.pop_front(); - } else if (audio_timecode < video_timecode) { - printf("Audio block 0x%04x without corresponding video block, dropping.\n", + lock.unlock(); + video_frame_allocator->release_frame(video_frame.frame); + } else if (uint16_less_than_with_wraparound(audio_timecode, video_timecode)) { + printf("Audio block 0x%04x without corresponding video block, sending blank frame.\n", audio_timecode); - audio_frame_allocator->release_frame(pending_audio_frames.front().frame); + QueuedFrame audio_frame = pending_audio_frames.front(); pending_audio_frames.pop_front(); + lock.unlock(); + audio_format.id = audio_frame.format; + + // Use the video format of the pending frame. + QueuedFrame video_frame = pending_video_frames.front(); + VideoFormat video_format; + decode_video_format(video_frame.format, &video_format); + + frame_callback(audio_timecode, + FrameAllocator::Frame(), 0, video_format, + audio_frame.frame, AUDIO_HEADER_SIZE, audio_format); } else { QueuedFrame video_frame = pending_video_frames.front(); QueuedFrame audio_frame = pending_audio_frames.front(); @@ -176,11 +211,22 @@ void BMUSBCapture::dequeue_thread() dump_audio_block(audio_frame.frame.data, audio_frame.data_len); #endif - frame_callback(video_timecode, - video_frame.frame, HEADER_SIZE, video_frame.format, - audio_frame.frame, AUDIO_HEADER_SIZE, audio_frame.format); + VideoFormat video_format; + audio_format.id = audio_frame.format; + if (decode_video_format(video_frame.format, &video_format)) { + frame_callback(video_timecode, + video_frame.frame, HEADER_SIZE, video_format, + audio_frame.frame, AUDIO_HEADER_SIZE, audio_format); + } else { + frame_callback(video_timecode, + FrameAllocator::Frame(), 0, video_format, + audio_frame.frame, AUDIO_HEADER_SIZE, audio_format); + } } } + if (has_dequeue_callbacks) { + dequeue_cleanup_callback(); + } } void BMUSBCapture::start_new_frame(const uint8_t *start) @@ -189,8 +235,30 @@ void BMUSBCapture::start_new_frame(const uint8_t *start) uint16_t timecode = (start[1] << 8) | start[0]; if (current_video_frame.len > 0) { + // If format is 0x0800 (no signal), add a fake (empty) audio + // frame to get it out of the queue. + // TODO: Figure out if there are other formats that come with + // no audio, and treat them the same. + if (format == 0x0800) { + FrameAllocator::Frame fake_audio_frame = audio_frame_allocator->alloc_frame(); + if (fake_audio_frame.data == nullptr) { + // Oh well, it's just a no-signal frame anyway. + printf("Couldn't allocate fake audio frame, also dropping no-signal video frame.\n"); + current_video_frame.owner->release_frame(current_video_frame); + current_video_frame = video_frame_allocator->alloc_frame(); + return; + } + queue_frame(format, timecode, fake_audio_frame, &pending_audio_frames); + } //dump_frame(); queue_frame(format, timecode, current_video_frame, &pending_video_frames); + + // Update the assumed frame width. We might be one frame too late on format changes, + // but it's much better than asking the user to choose manually. + VideoFormat video_format; + if (decode_video_format(format, &video_format)) { + assumed_frame_width = video_format.width; + } } //printf("Found frame start, format 0x%04x timecode 0x%04x, previous frame length was %d/%d\n", // format, timecode, @@ -257,8 +325,13 @@ void add_to_frame(FrameAllocator::Frame *current_frame, const char *frame_type_n int bytes = end - start; if (current_frame->len + bytes > current_frame->size) { - printf("%d bytes overflow after last %s frame\n", - int(current_frame->len + bytes - current_frame->size), frame_type_name); + current_frame->overflow = current_frame->len + bytes - current_frame->size; + current_frame->len = current_frame->size; + if (current_frame->overflow > 1048576) { + printf("%d bytes overflow after last %s frame\n", + int(current_frame->overflow), frame_type_name); + current_frame->overflow = 0; + } //dump_frame(); } else { if (current_frame->interleaved) { @@ -557,6 +630,9 @@ void BMUSBCapture::cb_xfr(struct libusb_transfer *xfr) decode_packs(xfr, "DeckLinkAudioResyncT", 20, &usb->current_audio_frame, "audio", bind(&BMUSBCapture::start_new_audio_block, usb, _1)); } else { decode_packs(xfr, "\x00\x00\xff\xff", 4, &usb->current_video_frame, "video", bind(&BMUSBCapture::start_new_frame, usb, _1)); + + // Update the transfer with the new assumed width, if we're in the process of changing formats. + change_xfer_size_for_width(usb->assumed_frame_width, xfr); } } if (xfr->type == LIBUSB_TRANSFER_TYPE_CONTROL) { @@ -599,8 +675,9 @@ void BMUSBCapture::cb_xfr(struct libusb_transfer *xfr) } #endif - if (libusb_submit_transfer(xfr) < 0) { - fprintf(stderr, "error re-submitting URB\n"); + int rc = libusb_submit_transfer(xfr); + if (rc < 0) { + fprintf(stderr, "error re-submitting URB: %s\n", libusb_error_name(rc)); exit(1); } } @@ -620,15 +697,98 @@ void BMUSBCapture::usb_thread_func() } } +struct USBCardDevice { + uint16_t product; + uint8_t bus, port; + libusb_device *device; +}; + +libusb_device_handle *open_card(int card_index, string *description) +{ + libusb_device **devices; + ssize_t num_devices = libusb_get_device_list(nullptr, &devices); + if (num_devices == -1) { + fprintf(stderr, "Error finding USB devices\n"); + exit(1); + } + vector found_cards; + for (ssize_t i = 0; i < num_devices; ++i) { + libusb_device_descriptor desc; + if (libusb_get_device_descriptor(devices[i], &desc) < 0) { + fprintf(stderr, "Error getting device descriptor for device %d\n", int(i)); + exit(1); + } + + uint8_t bus = libusb_get_bus_number(devices[i]); + uint8_t port = libusb_get_port_number(devices[i]); + + if (!(desc.idVendor == 0x1edb && desc.idProduct == 0xbd3b) && + !(desc.idVendor == 0x1edb && desc.idProduct == 0xbd4f)) { + libusb_unref_device(devices[i]); + continue; + } + + found_cards.push_back({ desc.idProduct, bus, port, devices[i] }); + } + libusb_free_device_list(devices, 0); + + // Sort the devices to get a consistent ordering. + sort(found_cards.begin(), found_cards.end(), [](const USBCardDevice &a, const USBCardDevice &b) { + if (a.product != b.product) + return a.product < b.product; + if (a.bus != b.bus) + return a.bus < b.bus; + return a.port < b.port; + }); + + for (size_t i = 0; i < found_cards.size(); ++i) { + const char *product_name = nullptr; + if (found_cards[i].product == 0xbd3b) { + product_name = "Intensity Shuttle"; + } else if (found_cards[i].product == 0xbd4f) { + product_name = "UltraStudio SDI"; + } else { + assert(false); + } + + char buf[256]; + snprintf(buf, sizeof(buf), "Card %d: Bus %03u Device %03u %s", + int(i), found_cards[i].bus, found_cards[i].port, product_name); + if (i == size_t(card_index)) { + *description = buf; + } + fprintf(stderr, "%s\n", buf); + } + + if (size_t(card_index) >= found_cards.size()) { + fprintf(stderr, "Could not open card %d (only %d found)\n", card_index, int(found_cards.size())); + exit(1); + } + + libusb_device_handle *devh; + int rc = libusb_open(found_cards[card_index].device, &devh); + if (rc < 0) { + fprintf(stderr, "Error opening card %d: %s\n", card_index, libusb_error_name(rc)); + exit(1); + } + + for (size_t i = 0; i < found_cards.size(); ++i) { + libusb_unref_device(found_cards[i].device); + } + + return devh; +} + void BMUSBCapture::configure_card() { if (video_frame_allocator == nullptr) { - set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE)); // FIXME: leak. + set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES)); // FIXME: leak. } if (audio_frame_allocator == nullptr) { - set_audio_frame_allocator(new MallocFrameAllocator(65536)); // FIXME: leak. + set_audio_frame_allocator(new MallocFrameAllocator(65536, NUM_QUEUED_AUDIO_FRAMES)); // FIXME: leak. } - thread(&BMUSBCapture::dequeue_thread, this).detach(); + dequeue_thread_should_quit = false; + dequeue_thread = thread(&BMUSBCapture::dequeue_thread_func, this); int rc; struct libusb_transfer *xfr; @@ -639,9 +799,7 @@ void BMUSBCapture::configure_card() exit(1); } - //struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, 0x1edb, 0xbd3b); - //struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, 0x1edb, 0xbd4f); - struct libusb_device_handle *devh = libusb_open_device_with_vid_pid(nullptr, vid, pid); + libusb_device_handle *devh = open_card(card_index, &description); if (!devh) { fprintf(stderr, "Error finding USB device\n"); exit(1); @@ -653,6 +811,8 @@ void BMUSBCapture::configure_card() fprintf(stderr, "Error getting configuration: %s\n", libusb_error_name(rc)); exit(1); } + +#if 0 printf("%d interface\n", config->bNumInterfaces); for (int interface_number = 0; interface_number < config->bNumInterfaces; ++interface_number) { printf(" interface %d\n", interface_number); @@ -666,6 +826,7 @@ void BMUSBCapture::configure_card() } } } +#endif rc = libusb_set_configuration(devh, /*configuration=*/1); if (rc < 0) { @@ -692,7 +853,7 @@ void BMUSBCapture::configure_card() } rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/2); if (rc < 0) { - fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc)); + fprintf(stderr, "Error setting alternate 2: %s\n", libusb_error_name(rc)); exit(1); } #if 0 @@ -794,12 +955,18 @@ void BMUSBCapture::configure_card() fprintf(stderr, "Error on control %d: %s\n", ctrls[req].index, libusb_error_name(rc)); exit(1); } - + + if (ctrls[req].index == 16 && rc == 4) { + printf("Card firmware version: 0x%02x%02x\n", value[2], value[3]); + } + +#if 0 printf("rc=%d: ep=%d@%d %d -> 0x", rc, ctrls[req].endpoint, ctrls[req].request, ctrls[req].index); for (int i = 0; i < rc; ++i) { printf("%02x", value[i]); } printf("\n"); +#endif } #if 0 @@ -865,28 +1032,24 @@ void BMUSBCapture::configure_card() // set up isochronous transfers for audio and video for (int e = 3; e <= 4; ++e) { //int num_transfers = (e == 3) ? 6 : 6; - int num_transfers = 6; + int num_transfers = 10; for (int i = 0; i < num_transfers; ++i) { + size_t buf_size; int num_iso_pack, size; if (e == 3) { - // Video seems to require isochronous packets scaled with the width; - // seemingly six lines is about right, rounded up to the required 1kB - // multiple. - size = WIDTH * 2 * 6; - // Note that for 10-bit input, you'll need to increase size accordingly. - //size = size * 4 / 3; - if (size % 1024 != 0) { - size &= ~1023; - size += 1024; - } - num_iso_pack = (2 << 18) / size; // 512 kB. - printf("Picking %d packets of 0x%x bytes each\n", num_iso_pack, size); + // Allocate for minimum width (because that will give us the most + // number of packets, so we don't need to reallocated, but we'll + // default to 720p for the first frame. + size = find_xfer_size_for_width(MIN_WIDTH); + num_iso_pack = USB_VIDEO_TRANSFER_SIZE / size; + buf_size = USB_VIDEO_TRANSFER_SIZE; } else { size = 0xc0; num_iso_pack = 80; + buf_size = num_iso_pack * size; } - int num_bytes = num_iso_pack * size; - uint8_t *buf = new uint8_t[num_bytes]; + assert(size_t(num_iso_pack * size) <= buf_size); + uint8_t *buf = new uint8_t[buf_size]; xfr = libusb_alloc_transfer(num_iso_pack); if (!xfr) { @@ -895,10 +1058,15 @@ void BMUSBCapture::configure_card() } int ep = LIBUSB_ENDPOINT_IN | e; - libusb_fill_iso_transfer(xfr, devh, ep, buf, num_bytes, + libusb_fill_iso_transfer(xfr, devh, ep, buf, buf_size, num_iso_pack, cb_xfr, nullptr, 0); libusb_set_iso_packet_lengths(xfr, size); xfr->user_data = this; + + if (e == 3) { + change_xfer_size_for_width(assumed_frame_width, xfr); + } + iso_xfrs.push_back(xfr); } } @@ -906,10 +1074,8 @@ void BMUSBCapture::configure_card() void BMUSBCapture::start_bm_capture() { - printf("starting capture\n"); int i = 0; for (libusb_transfer *xfr : iso_xfrs) { - printf("submitting transfer...\n"); int rc = libusb_submit_transfer(xfr); ++i; if (rc < 0) { @@ -931,6 +1097,13 @@ out: #endif } +void BMUSBCapture::stop_dequeue_thread() +{ + dequeue_thread_should_quit = true; + queues_not_empty.notify_all(); + dequeue_thread.join(); +} + void BMUSBCapture::start_bm_thread() { should_quit = false; @@ -942,3 +1115,137 @@ void BMUSBCapture::stop_bm_thread() should_quit = true; usb_thread.join(); } + +struct VideoFormatEntry { + uint16_t normalized_video_format; + unsigned width, height, second_field_start; + unsigned extra_lines_top, extra_lines_bottom; + unsigned frame_rate_nom, frame_rate_den; + bool interlaced; +}; + +bool decode_video_format(uint16_t video_format, VideoFormat *decoded_video_format) +{ + decoded_video_format->id = video_format; + decoded_video_format->interlaced = false; + + // TODO: Add these for all formats as we find them. + decoded_video_format->extra_lines_top = decoded_video_format->extra_lines_bottom = decoded_video_format->second_field_start = 0; + + if (video_format == 0x0800) { + // No video signal. These green pseudo-frames seem to come at about 30.13 Hz. + // It's a strange thing, but what can you do. + decoded_video_format->width = 720; + decoded_video_format->height = 525; + decoded_video_format->extra_lines_top = 0; + decoded_video_format->extra_lines_bottom = 0; + decoded_video_format->frame_rate_nom = 3013; + decoded_video_format->frame_rate_den = 100; + decoded_video_format->has_signal = false; + return true; + } + if ((video_format & 0xe800) != 0xe800) { + printf("Video format 0x%04x does not appear to be a video format. Assuming 60 Hz.\n", + video_format); + decoded_video_format->width = 0; + decoded_video_format->height = 0; + decoded_video_format->extra_lines_top = 0; + decoded_video_format->extra_lines_bottom = 0; + decoded_video_format->frame_rate_nom = 60; + decoded_video_format->frame_rate_den = 1; + decoded_video_format->has_signal = false; + return false; + } + + decoded_video_format->has_signal = true; + + // NTSC (480i59.94, I suppose). A special case, see below. + if (video_format == 0xe901 || video_format == 0xe9c1 || video_format == 0xe801) { + decoded_video_format->width = 720; + decoded_video_format->height = 480; + decoded_video_format->extra_lines_top = 17; + decoded_video_format->extra_lines_bottom = 28; + decoded_video_format->frame_rate_nom = 30000; + decoded_video_format->frame_rate_den = 1001; + decoded_video_format->second_field_start = 280; + decoded_video_format->interlaced = true; + return true; + } + + // PAL (576i50, I suppose). A special case, see below. + if (video_format == 0xe909 || video_format == 0xe9c9 || video_format == 0xe809 || video_format == 0xebe9 || video_format == 0xebe1) { + decoded_video_format->width = 720; + decoded_video_format->height = 576; + decoded_video_format->extra_lines_top = 22; + decoded_video_format->extra_lines_bottom = 27; + decoded_video_format->frame_rate_nom = 25; + decoded_video_format->frame_rate_den = 1; + decoded_video_format->second_field_start = 335; + decoded_video_format->interlaced = true; + return true; + } + + // 0x8 seems to be a flag about availability of deep color on the input, + // except when it's not (e.g. it's the only difference between NTSC + // and PAL). Rather confusing. But we clear it here nevertheless, because + // usually it doesn't mean anything. + // + // 0x4 is a flag I've only seen from the D4. I don't know what it is. + uint16_t normalized_video_format = video_format & ~0xe80c; + constexpr VideoFormatEntry entries[] = { + { 0x01f1, 720, 480, 0, 40, 5, 60000, 1001, false }, // 480p59.94 (believed). + { 0x0131, 720, 576, 0, 44, 5, 50, 1, false }, // 576p50. + { 0x0011, 720, 576, 0, 44, 5, 50, 1, false }, // 576p50 (5:4). + { 0x0143, 1280, 720, 0, 25, 5, 50, 1, false }, // 720p50. + { 0x0103, 1280, 720, 0, 25, 5, 60, 1, false }, // 720p60. + { 0x0125, 1280, 720, 0, 25, 5, 60, 1, false }, // 720p60. + { 0x0121, 1280, 720, 0, 25, 5, 60000, 1001, false }, // 720p59.94. + { 0x01c3, 1920, 1080, 0, 0, 0, 30, 1, false }, // 1080p30. + { 0x0003, 1920, 1080, 583, 20, 25, 30, 1, true }, // 1080i60. + { 0x01e1, 1920, 1080, 0, 0, 0, 30000, 1001, false }, // 1080p29.97. + { 0x0021, 1920, 1080, 583, 20, 25, 30000, 1001, true }, // 1080i59.94. + { 0x0063, 1920, 1080, 0, 0, 0, 25, 1, false }, // 1080p25. + { 0x0043, 1920, 1080, 0, 0, 0, 25, 1, true }, // 1080p50. + { 0x008e, 1920, 1080, 0, 0, 0, 24, 1, false }, // 1080p24. + { 0x00a1, 1920, 1080, 0, 0, 0, 24000, 1001, false }, // 1080p23.98. + }; + for (const VideoFormatEntry &entry : entries) { + if (normalized_video_format == entry.normalized_video_format) { + decoded_video_format->width = entry.width; + decoded_video_format->height = entry.height; + decoded_video_format->second_field_start = entry.second_field_start; + decoded_video_format->extra_lines_top = entry.extra_lines_top; + decoded_video_format->extra_lines_bottom = entry.extra_lines_bottom; + decoded_video_format->frame_rate_nom = entry.frame_rate_nom; + decoded_video_format->frame_rate_den = entry.frame_rate_den; + decoded_video_format->interlaced = entry.interlaced; + return true; + } + } + + printf("Unknown video format 0x%04x (normalized 0x%04x). Assuming 720p60.\n", video_format, normalized_video_format); + decoded_video_format->width = 1280; + decoded_video_format->height = 720; + decoded_video_format->frame_rate_nom = 60; + decoded_video_format->frame_rate_den = 1; + return false; +} + +map BMUSBCapture::get_available_video_modes() const +{ + // The USB3 cards autodetect, and seem to have no provision for forcing modes. + VideoMode auto_mode; + auto_mode.name = "Autodetect"; + auto_mode.autodetect = true; + return {{ 0, auto_mode }}; +} + +uint32_t BMUSBCapture::get_current_video_mode() const +{ + return 0; // Matches get_available_video_modes(). +} + +void BMUSBCapture::set_video_mode(uint32_t video_mode_id) +{ + assert(video_mode_id == 0); // Matches get_available_video_modes(). +}