1 #include "decklink_capture.h"
10 #include <immintrin.h>
13 #include <DeckLinkAPI.h>
14 #include <DeckLinkAPIConfiguration.h>
15 #include <DeckLinkAPIDiscovery.h>
16 #include <DeckLinkAPIModes.h>
17 #include "bmusb/bmusb.h"
19 #define FRAME_SIZE (8 << 20) // 8 MB.
22 using namespace std::placeholders;
26 // TODO: Support stride.
27 void memcpy_interleaved(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
30 uint8_t *dptr1 = dest1;
31 uint8_t *dptr2 = dest2;
33 for (size_t i = 0; i < n; i += 2) {
41 // Returns the number of bytes consumed.
42 size_t memcpy_interleaved_fastpath(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
44 const uint8_t *limit = src + n;
47 // Align end to 32 bytes.
48 limit = (const uint8_t *)(intptr_t(limit) & ~31);
54 // Process [0,31] bytes, such that start gets aligned to 32 bytes.
55 const uint8_t *aligned_src = (const uint8_t *)(intptr_t(src + 31) & ~31);
56 if (aligned_src != src) {
57 size_t n2 = aligned_src - src;
58 memcpy_interleaved(dest1, dest2, src, n2);
68 // Make the length a multiple of 64.
69 if (((limit - src) % 64) != 0) {
72 assert(((limit - src) % 64) == 0);
75 const __restrict __m256i *in = (const __m256i *)src;
76 __restrict __m256i *out1 = (__m256i *)dest1;
77 __restrict __m256i *out2 = (__m256i *)dest2;
79 __m256i shuffle_cw = _mm256_set_epi8(
80 15, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0,
81 15, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0);
82 while (in < (const __m256i *)limit) {
83 // Note: For brevity, comments show lanes as if they were 2x64-bit (they're actually 2x128).
84 __m256i data1 = _mm256_stream_load_si256(in); // AaBbCcDd EeFfGgHh
85 __m256i data2 = _mm256_stream_load_si256(in + 1); // IiJjKkLl MmNnOoPp
87 data1 = _mm256_shuffle_epi8(data1, shuffle_cw); // ABCDabcd EFGHefgh
88 data2 = _mm256_shuffle_epi8(data2, shuffle_cw); // IJKLijkl MNOPmnop
90 data1 = _mm256_permute4x64_epi64(data1, 0b11011000); // ABCDEFGH abcdefgh
91 data2 = _mm256_permute4x64_epi64(data2, 0b11011000); // IJKLMNOP ijklmnop
93 __m256i lo = _mm256_permute2x128_si256(data1, data2, 0b00100000);
94 __m256i hi = _mm256_permute2x128_si256(data1, data2, 0b00110001);
96 _mm256_storeu_si256(out1, lo);
97 _mm256_storeu_si256(out2, hi);
105 const __restrict __m128i *in = (const __m128i *)src;
106 __restrict __m128i *out1 = (__m128i *)dest1;
107 __restrict __m128i *out2 = (__m128i *)dest2;
109 __m128i mask_lower_byte = _mm_set1_epi16(0x00ff);
110 while (in < (const __m128i *)limit) {
111 __m128i data1 = _mm_load_si128(in);
112 __m128i data2 = _mm_load_si128(in + 1);
113 __m128i data1_lo = _mm_and_si128(data1, mask_lower_byte);
114 __m128i data2_lo = _mm_and_si128(data2, mask_lower_byte);
115 __m128i data1_hi = _mm_srli_epi16(data1, 8);
116 __m128i data2_hi = _mm_srli_epi16(data2, 8);
117 __m128i lo = _mm_packus_epi16(data1_lo, data2_lo);
118 _mm_storeu_si128(out1, lo);
119 __m128i hi = _mm_packus_epi16(data1_hi, data2_hi);
120 _mm_storeu_si128(out2, hi);
136 DeckLinkCapture::DeckLinkCapture(IDeckLink *card, int card_index)
137 : card_index(card_index)
140 const char *model_name;
142 if (card->GetModelName(&model_name) == S_OK) {
143 snprintf(buf, sizeof(buf), "PCI card %d: %s", card_index, model_name);
145 snprintf(buf, sizeof(buf), "PCI card %d: Unknown DeckLink card", card_index);
150 if (card->QueryInterface(IID_IDeckLinkInput, (void**)&input) != S_OK) {
151 fprintf(stderr, "Card %d has no inputs\n", card_index);
155 IDeckLinkAttributes *attr;
156 if (card->QueryInterface(IID_IDeckLinkAttributes, (void**)&attr) != S_OK) {
157 fprintf(stderr, "Card %d has no attributes\n", card_index);
161 // Get the list of available video inputs.
162 int64_t video_input_mask;
163 if (attr->GetInt(BMDDeckLinkVideoInputConnections, &video_input_mask) != S_OK) {
164 fprintf(stderr, "Failed to enumerate video inputs for card %d\n", card_index);
167 const vector<pair<BMDVideoConnection, string>> video_input_types = {
168 { bmdVideoConnectionSDI, "SDI" },
169 { bmdVideoConnectionHDMI, "HDMI" },
170 { bmdVideoConnectionOpticalSDI, "Optical SDI" },
171 { bmdVideoConnectionComponent, "Component" },
172 { bmdVideoConnectionComposite, "Composite" },
173 { bmdVideoConnectionSVideo, "S-Video" }
175 for (const auto &video_input : video_input_types) {
176 if (video_input_mask & video_input.first) {
177 video_inputs.emplace(video_input.first, video_input.second);
181 // And then the available audio inputs.
182 int64_t audio_input_mask;
183 if (attr->GetInt(BMDDeckLinkAudioInputConnections, &audio_input_mask) != S_OK) {
184 fprintf(stderr, "Failed to enumerate audio inputs for card %d\n", card_index);
187 const vector<pair<BMDAudioConnection, string>> audio_input_types = {
188 { bmdAudioConnectionEmbedded, "Embedded" },
189 { bmdAudioConnectionAESEBU, "AES/EBU" },
190 { bmdAudioConnectionAnalog, "Analog" },
191 { bmdAudioConnectionAnalogXLR, "Analog XLR" },
192 { bmdAudioConnectionAnalogRCA, "Analog RCA" },
193 { bmdAudioConnectionMicrophone, "Microphone" },
194 { bmdAudioConnectionHeadphones, "Headphones" }
196 for (const auto &audio_input : audio_input_types) {
197 if (audio_input_mask & audio_input.first) {
198 audio_inputs.emplace(audio_input.first, audio_input.second);
204 /* Set up the video and audio sources. */
205 if (card->QueryInterface(IID_IDeckLinkConfiguration, (void**)&config) != S_OK) {
206 fprintf(stderr, "Failed to get configuration interface for card %d\n", card_index);
210 set_video_input(bmdVideoConnectionHDMI);
211 set_audio_input(bmdAudioConnectionEmbedded);
213 IDeckLinkDisplayModeIterator *mode_it;
214 if (input->GetDisplayModeIterator(&mode_it) != S_OK) {
215 fprintf(stderr, "Failed to enumerate display modes for card %d\n", card_index);
219 for (IDeckLinkDisplayMode *mode_ptr; mode_it->Next(&mode_ptr) == S_OK; mode_ptr->Release()) {
222 const char *mode_name;
223 if (mode_ptr->GetName(&mode_name) != S_OK) {
224 mode.name = "Unknown mode";
226 mode.name = mode_name;
229 mode.autodetect = false;
231 mode.width = mode_ptr->GetWidth();
232 mode.height = mode_ptr->GetHeight();
234 BMDTimeScale frame_rate_num;
235 BMDTimeValue frame_rate_den;
236 if (mode_ptr->GetFrameRate(&frame_rate_den, &frame_rate_num) != S_OK) {
237 fprintf(stderr, "Could not get frame rate for mode '%s' on card %d\n", mode.name.c_str(), card_index);
240 mode.frame_rate_num = frame_rate_num;
241 mode.frame_rate_den = frame_rate_den;
243 // TODO: Respect the TFF/BFF flag.
244 mode.interlaced = (mode_ptr->GetFieldDominance() == bmdLowerFieldFirst || mode_ptr->GetFieldDominance() == bmdUpperFieldFirst);
246 uint32_t id = mode_ptr->GetDisplayMode();
247 video_modes.insert(make_pair(id, mode));
250 set_video_mode_no_restart(bmdModeHD720p5994);
252 if (input->EnableAudioInput(48000, bmdAudioSampleType32bitInteger, 2) != S_OK) {
253 fprintf(stderr, "Failed to enable audio input for card %d\n", card_index);
257 input->SetCallback(this);
260 DeckLinkCapture::~DeckLinkCapture()
262 if (has_dequeue_callbacks) {
263 dequeue_cleanup_callback();
267 HRESULT STDMETHODCALLTYPE DeckLinkCapture::QueryInterface(REFIID, LPVOID *)
269 return E_NOINTERFACE;
272 ULONG STDMETHODCALLTYPE DeckLinkCapture::AddRef(void)
274 return refcount.fetch_add(1) + 1;
277 ULONG STDMETHODCALLTYPE DeckLinkCapture::Release(void)
279 int new_ref = refcount.fetch_sub(1) - 1;
285 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFormatChanged(
286 BMDVideoInputFormatChangedEvents,
287 IDeckLinkDisplayMode* display_mode,
288 BMDDetectedVideoInputFormatFlags)
290 if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
291 fprintf(stderr, "Could not get new frame rate\n");
297 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFrameArrived(
298 IDeckLinkVideoInputFrame *video_frame,
299 IDeckLinkAudioInputPacket *audio_frame)
302 if (has_dequeue_callbacks) {
303 dequeue_init_callback();
308 FrameAllocator::Frame current_video_frame, current_audio_frame;
309 VideoFormat video_format;
310 AudioFormat audio_format;
312 video_format.frame_rate_nom = time_scale;
313 video_format.frame_rate_den = frame_duration;
316 video_format.has_signal = !(video_frame->GetFlags() & bmdFrameHasNoInputSource);
318 int width = video_frame->GetWidth();
319 int height = video_frame->GetHeight();
320 const int stride = video_frame->GetRowBytes();
321 assert(stride == width * 2);
323 current_video_frame = video_frame_allocator->alloc_frame();
324 if (current_video_frame.data != nullptr) {
325 const uint8_t *frame_bytes;
326 video_frame->GetBytes((void **)&frame_bytes);
328 uint8_t *data = current_video_frame.data;
329 uint8_t *data2 = current_video_frame.data2;
330 size_t num_bytes = width * height * 2;
332 size_t consumed = memcpy_interleaved_fastpath(data, data2, frame_bytes, num_bytes);
333 frame_bytes += consumed;
334 data += consumed / 2;
335 data2 += consumed / 2;
339 current_video_frame.len += consumed;
340 num_bytes -= consumed;
344 memcpy_interleaved(data, data2, frame_bytes, num_bytes);
346 current_video_frame.len += num_bytes;
348 video_format.width = width;
349 video_format.height = height;
354 int num_samples = audio_frame->GetSampleFrameCount();
356 current_audio_frame = audio_frame_allocator->alloc_frame();
357 if (current_audio_frame.data != nullptr) {
358 const uint8_t *frame_bytes;
359 audio_frame->GetBytes((void **)&frame_bytes);
360 current_audio_frame.len = sizeof(int32_t) * 2 * num_samples;
362 memcpy(current_audio_frame.data, frame_bytes, current_audio_frame.len);
364 audio_format.bits_per_sample = 32;
365 audio_format.num_channels = 2;
369 if (current_video_frame.data != nullptr || current_audio_frame.data != nullptr) {
370 // TODO: Put into a queue and put into a dequeue thread, if the
371 // BlackMagic drivers don't already do that for us?
372 frame_callback(timecode,
373 current_video_frame, /*video_offset=*/0, video_format,
374 current_audio_frame, /*audio_offset=*/0, audio_format);
381 void DeckLinkCapture::configure_card()
383 if (video_frame_allocator == nullptr) {
384 set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES)); // FIXME: leak.
386 if (audio_frame_allocator == nullptr) {
387 set_audio_frame_allocator(new MallocFrameAllocator(65536, NUM_QUEUED_AUDIO_FRAMES)); // FIXME: leak.
391 void DeckLinkCapture::start_bm_capture()
393 if (input->StartStreams() != S_OK) {
394 fprintf(stderr, "StartStreams failed\n");
399 void DeckLinkCapture::stop_dequeue_thread()
401 if (input->StopStreams() != S_OK) {
402 fprintf(stderr, "StopStreams failed\n");
407 void DeckLinkCapture::set_video_mode(uint32_t video_mode_id)
409 if (input->StopStreams() != S_OK) {
410 fprintf(stderr, "StopStreams failed\n");
414 set_video_mode_no_restart(video_mode_id);
416 if (input->StartStreams() != S_OK) {
417 fprintf(stderr, "StartStreams failed\n");
422 void DeckLinkCapture::set_video_mode_no_restart(uint32_t video_mode_id)
424 BMDDisplayModeSupport support;
425 IDeckLinkDisplayMode *display_mode;
426 if (input->DoesSupportVideoMode(video_mode_id, bmdFormat8BitYUV, /*flags=*/0, &support, &display_mode)) {
427 fprintf(stderr, "Failed to query display mode for card %d\n", card_index);
431 if (support == bmdDisplayModeNotSupported) {
432 fprintf(stderr, "Card %d does not support display mode\n", card_index);
436 if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
437 fprintf(stderr, "Could not get frame rate for card %d\n", card_index);
441 if (input->EnableVideoInput(video_mode_id, bmdFormat8BitYUV, 0) != S_OK) {
442 fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", video_mode_id, card_index);
446 current_video_mode = video_mode_id;
449 void DeckLinkCapture::set_video_input(uint32_t video_input_id)
451 if (config->SetInt(bmdDeckLinkConfigVideoInputConnection, video_input_id) != S_OK) {
452 fprintf(stderr, "Failed to set video input connection for card %d\n", card_index);
456 current_video_input = video_input_id;
459 void DeckLinkCapture::set_audio_input(uint32_t audio_input_id)
461 if (config->SetInt(bmdDeckLinkConfigAudioInputConnection, audio_input_id) != S_OK) {
462 fprintf(stderr, "Failed to set audio input connection for card %d\n", card_index);
466 current_audio_input = audio_input_id;