1 #include "decklink_capture.h"
3 #include <DeckLinkAPI.h>
4 #include <DeckLinkAPIConfiguration.h>
5 #include <DeckLinkAPIDiscovery.h>
6 #include <DeckLinkAPIModes.h>
20 #include "bmusb/bmusb.h"
21 #include "decklink_util.h"
23 #define FRAME_SIZE (8 << 20) // 8 MB.
26 using namespace std::chrono;
27 using namespace std::placeholders;
28 using namespace bmusb;
32 // TODO: Support stride.
33 void memcpy_interleaved(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
36 uint8_t *dptr1 = dest1;
37 uint8_t *dptr2 = dest2;
39 for (size_t i = 0; i < n; i += 2) {
47 // Returns the number of bytes consumed.
48 size_t memcpy_interleaved_fastpath(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
50 const uint8_t *limit = src + n;
53 // Align end to 32 bytes.
54 limit = (const uint8_t *)(intptr_t(limit) & ~31);
60 // Process [0,31] bytes, such that start gets aligned to 32 bytes.
61 const uint8_t *aligned_src = (const uint8_t *)(intptr_t(src + 31) & ~31);
62 if (aligned_src != src) {
63 size_t n2 = aligned_src - src;
64 memcpy_interleaved(dest1, dest2, src, n2);
74 // Make the length a multiple of 64.
75 if (((limit - src) % 64) != 0) {
78 assert(((limit - src) % 64) == 0);
81 const __m256i * __restrict in = (const __m256i *)src;
82 __m256i * __restrict out1 = (__m256i *)dest1;
83 __m256i * __restrict out2 = (__m256i *)dest2;
85 __m256i shuffle_cw = _mm256_set_epi8(
86 15, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0,
87 15, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0);
88 while (in < (const __m256i *)limit) {
89 // Note: For brevity, comments show lanes as if they were 2x64-bit (they're actually 2x128).
90 __m256i data1 = _mm256_stream_load_si256(in); // AaBbCcDd EeFfGgHh
91 __m256i data2 = _mm256_stream_load_si256(in + 1); // IiJjKkLl MmNnOoPp
93 data1 = _mm256_shuffle_epi8(data1, shuffle_cw); // ABCDabcd EFGHefgh
94 data2 = _mm256_shuffle_epi8(data2, shuffle_cw); // IJKLijkl MNOPmnop
96 data1 = _mm256_permute4x64_epi64(data1, 0b11011000); // ABCDEFGH abcdefgh
97 data2 = _mm256_permute4x64_epi64(data2, 0b11011000); // IJKLMNOP ijklmnop
99 __m256i lo = _mm256_permute2x128_si256(data1, data2, 0b00100000);
100 __m256i hi = _mm256_permute2x128_si256(data1, data2, 0b00110001);
102 _mm256_storeu_si256(out1, lo);
103 _mm256_storeu_si256(out2, hi);
111 const __m128i * __restrict in = (const __m128i *)src;
112 __m128i * __restrict out1 = (__m128i *)dest1;
113 __m128i * __restrict out2 = (__m128i *)dest2;
115 __m128i mask_lower_byte = _mm_set1_epi16(0x00ff);
116 while (in < (const __m128i *)limit) {
117 __m128i data1 = _mm_load_si128(in);
118 __m128i data2 = _mm_load_si128(in + 1);
119 __m128i data1_lo = _mm_and_si128(data1, mask_lower_byte);
120 __m128i data2_lo = _mm_and_si128(data2, mask_lower_byte);
121 __m128i data1_hi = _mm_srli_epi16(data1, 8);
122 __m128i data2_hi = _mm_srli_epi16(data2, 8);
123 __m128i lo = _mm_packus_epi16(data1_lo, data2_lo);
124 _mm_storeu_si128(out1, lo);
125 __m128i hi = _mm_packus_epi16(data1_hi, data2_hi);
126 _mm_storeu_si128(out2, hi);
142 DeckLinkCapture::DeckLinkCapture(IDeckLink *card, int card_index)
143 : card_index(card_index), card(card)
146 const char *model_name;
148 if (card->GetModelName(&model_name) == S_OK) {
149 snprintf(buf, sizeof(buf), "PCI card %d: %s", card_index, model_name);
151 snprintf(buf, sizeof(buf), "PCI card %d: Unknown DeckLink card", card_index);
156 if (card->QueryInterface(IID_IDeckLinkInput, (void**)&input) != S_OK) {
157 fprintf(stderr, "Card %d has no inputs\n", card_index);
161 IDeckLinkAttributes *attr;
162 if (card->QueryInterface(IID_IDeckLinkAttributes, (void**)&attr) != S_OK) {
163 fprintf(stderr, "Card %d has no attributes\n", card_index);
167 // Get the list of available video inputs.
168 int64_t video_input_mask;
169 if (attr->GetInt(BMDDeckLinkVideoInputConnections, &video_input_mask) != S_OK) {
170 fprintf(stderr, "Failed to enumerate video inputs for card %d\n", card_index);
173 const vector<pair<BMDVideoConnection, string>> video_input_types = {
174 { bmdVideoConnectionSDI, "SDI" },
175 { bmdVideoConnectionHDMI, "HDMI" },
176 { bmdVideoConnectionOpticalSDI, "Optical SDI" },
177 { bmdVideoConnectionComponent, "Component" },
178 { bmdVideoConnectionComposite, "Composite" },
179 { bmdVideoConnectionSVideo, "S-Video" }
181 for (const auto &video_input : video_input_types) {
182 if (video_input_mask & video_input.first) {
183 video_inputs.emplace(video_input.first, video_input.second);
187 // And then the available audio inputs.
188 int64_t audio_input_mask;
189 if (attr->GetInt(BMDDeckLinkAudioInputConnections, &audio_input_mask) != S_OK) {
190 fprintf(stderr, "Failed to enumerate audio inputs for card %d\n", card_index);
193 const vector<pair<BMDAudioConnection, string>> audio_input_types = {
194 { bmdAudioConnectionEmbedded, "Embedded" },
195 { bmdAudioConnectionAESEBU, "AES/EBU" },
196 { bmdAudioConnectionAnalog, "Analog" },
197 { bmdAudioConnectionAnalogXLR, "Analog XLR" },
198 { bmdAudioConnectionAnalogRCA, "Analog RCA" },
199 { bmdAudioConnectionMicrophone, "Microphone" },
200 { bmdAudioConnectionHeadphones, "Headphones" }
202 for (const auto &audio_input : audio_input_types) {
203 if (audio_input_mask & audio_input.first) {
204 audio_inputs.emplace(audio_input.first, audio_input.second);
210 /* Set up the video and audio sources. */
211 if (card->QueryInterface(IID_IDeckLinkConfiguration, (void**)&config) != S_OK) {
212 fprintf(stderr, "Failed to get configuration interface for card %d\n", card_index);
216 set_video_input(bmdVideoConnectionHDMI);
217 set_audio_input(bmdAudioConnectionEmbedded);
219 IDeckLinkDisplayModeIterator *mode_it;
220 if (input->GetDisplayModeIterator(&mode_it) != S_OK) {
221 fprintf(stderr, "Failed to enumerate display modes for card %d\n", card_index);
225 video_modes = summarize_video_modes(mode_it, card_index);
228 set_video_mode_no_restart(bmdModeHD720p5994);
230 input->SetCallback(this);
233 DeckLinkCapture::~DeckLinkCapture()
235 if (has_dequeue_callbacks) {
236 dequeue_cleanup_callback();
243 HRESULT STDMETHODCALLTYPE DeckLinkCapture::QueryInterface(REFIID, LPVOID *)
245 return E_NOINTERFACE;
248 ULONG STDMETHODCALLTYPE DeckLinkCapture::AddRef(void)
250 return refcount.fetch_add(1) + 1;
253 ULONG STDMETHODCALLTYPE DeckLinkCapture::Release(void)
255 int new_ref = refcount.fetch_sub(1) - 1;
261 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFormatChanged(
262 BMDVideoInputFormatChangedEvents,
263 IDeckLinkDisplayMode* display_mode,
264 BMDDetectedVideoInputFormatFlags)
266 if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
267 fprintf(stderr, "Could not get new frame rate\n");
270 field_dominance = display_mode->GetFieldDominance();
274 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFrameArrived(
275 IDeckLinkVideoInputFrame *video_frame,
276 IDeckLinkAudioInputPacket *audio_frame)
279 if (has_dequeue_callbacks) {
280 dequeue_init_callback();
285 FrameAllocator::Frame current_video_frame, current_audio_frame;
286 VideoFormat video_format;
287 AudioFormat audio_format;
289 video_format.frame_rate_nom = time_scale;
290 video_format.frame_rate_den = frame_duration;
291 // TODO: Respect the TFF/BFF flag.
292 video_format.interlaced = (field_dominance == bmdLowerFieldFirst || field_dominance == bmdUpperFieldFirst);
293 video_format.second_field_start = 1;
296 video_format.has_signal = !(video_frame->GetFlags() & bmdFrameHasNoInputSource);
298 int width = video_frame->GetWidth();
299 int height = video_frame->GetHeight();
300 const int stride = video_frame->GetRowBytes();
301 assert(stride == width * 2);
303 current_video_frame = video_frame_allocator->alloc_frame();
304 if (current_video_frame.data != nullptr) {
305 const uint8_t *frame_bytes;
306 video_frame->GetBytes((void **)&frame_bytes);
308 uint8_t *data = current_video_frame.data;
309 uint8_t *data2 = current_video_frame.data2;
310 size_t num_bytes = width * height * 2;
312 size_t consumed = memcpy_interleaved_fastpath(data, data2, frame_bytes, num_bytes);
313 frame_bytes += consumed;
314 data += consumed / 2;
315 data2 += consumed / 2;
319 current_video_frame.len += consumed;
320 num_bytes -= consumed;
324 memcpy_interleaved(data, data2, frame_bytes, num_bytes);
326 current_video_frame.len += num_bytes;
328 video_format.width = width;
329 video_format.height = height;
331 current_video_frame.received_timestamp = steady_clock::now();
336 int num_samples = audio_frame->GetSampleFrameCount();
338 current_audio_frame = audio_frame_allocator->alloc_frame();
339 if (current_audio_frame.data != nullptr) {
340 const uint8_t *frame_bytes;
341 audio_frame->GetBytes((void **)&frame_bytes);
342 current_audio_frame.len = sizeof(int32_t) * 2 * num_samples;
344 memcpy(current_audio_frame.data, frame_bytes, current_audio_frame.len);
346 audio_format.bits_per_sample = 32;
347 audio_format.num_channels = 2;
349 current_audio_frame.received_timestamp = steady_clock::now();
353 if (current_video_frame.data != nullptr || current_audio_frame.data != nullptr) {
354 // TODO: Put into a queue and put into a dequeue thread, if the
355 // BlackMagic drivers don't already do that for us?
356 frame_callback(timecode,
357 current_video_frame, /*video_offset=*/0, video_format,
358 current_audio_frame, /*audio_offset=*/0, audio_format);
365 void DeckLinkCapture::configure_card()
367 if (video_frame_allocator == nullptr) {
368 owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
369 set_video_frame_allocator(owned_video_frame_allocator.get());
371 if (audio_frame_allocator == nullptr) {
372 owned_audio_frame_allocator.reset(new MallocFrameAllocator(65536, NUM_QUEUED_AUDIO_FRAMES));
373 set_audio_frame_allocator(owned_audio_frame_allocator.get());
377 void DeckLinkCapture::start_bm_capture()
382 if (input->EnableVideoInput(current_video_mode, bmdFormat8BitYUV, 0) != S_OK) {
383 fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", current_video_mode, card_index);
386 if (input->EnableAudioInput(48000, bmdAudioSampleType32bitInteger, 2) != S_OK) {
387 fprintf(stderr, "Failed to enable audio input for card %d\n", card_index);
391 if (input->StartStreams() != S_OK) {
392 fprintf(stderr, "StartStreams failed\n");
398 void DeckLinkCapture::stop_dequeue_thread()
403 HRESULT result = input->StopStreams();
404 if (result != S_OK) {
405 fprintf(stderr, "StopStreams failed with error 0x%x\n", result);
408 if (input->DisableVideoInput() != S_OK) {
409 fprintf(stderr, "Failed to disable video input for card %d\n", card_index);
412 if (input->DisableAudioInput() != S_OK) {
413 fprintf(stderr, "Failed to disable audio input for card %d\n", card_index);
419 void DeckLinkCapture::set_video_mode(uint32_t video_mode_id)
421 if (input->StopStreams() != S_OK) {
422 fprintf(stderr, "StopStreams failed\n");
426 set_video_mode_no_restart(video_mode_id);
428 if (input->StartStreams() != S_OK) {
429 fprintf(stderr, "StartStreams failed\n");
434 void DeckLinkCapture::set_video_mode_no_restart(uint32_t video_mode_id)
436 BMDDisplayModeSupport support;
437 IDeckLinkDisplayMode *display_mode;
438 if (input->DoesSupportVideoMode(video_mode_id, bmdFormat8BitYUV, /*flags=*/0, &support, &display_mode)) {
439 fprintf(stderr, "Failed to query display mode for card %d\n", card_index);
443 if (support == bmdDisplayModeNotSupported) {
444 fprintf(stderr, "Card %d does not support display mode\n", card_index);
448 if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
449 fprintf(stderr, "Could not get frame rate for card %d\n", card_index);
453 field_dominance = display_mode->GetFieldDominance();
456 if (input->EnableVideoInput(video_mode_id, bmdFormat8BitYUV, 0) != S_OK) {
457 fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", video_mode_id, card_index);
462 current_video_mode = video_mode_id;
465 void DeckLinkCapture::set_video_input(uint32_t video_input_id)
467 if (config->SetInt(bmdDeckLinkConfigVideoInputConnection, video_input_id) != S_OK) {
468 fprintf(stderr, "Failed to set video input connection for card %d\n", card_index);
472 current_video_input = video_input_id;
475 void DeckLinkCapture::set_audio_input(uint32_t audio_input_id)
477 if (config->SetInt(bmdDeckLinkConfigAudioInputConnection, audio_input_id) != S_OK) {
478 fprintf(stderr, "Failed to set audio input connection for card %d\n", card_index);
482 current_audio_input = audio_input_id;