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 BMDVideoConnection connection = pick_default_video_connection(card, BMDDeckLinkVideoInputConnections, card_index);
218 set_video_input(connection);
219 set_audio_input(bmdAudioConnectionEmbedded);
221 IDeckLinkDisplayModeIterator *mode_it;
222 if (input->GetDisplayModeIterator(&mode_it) != S_OK) {
223 fprintf(stderr, "Failed to enumerate display modes for card %d\n", card_index);
227 video_modes = summarize_video_modes(mode_it, card_index);
230 set_video_mode_no_restart(bmdModeHD720p5994);
232 input->SetCallback(this);
235 DeckLinkCapture::~DeckLinkCapture()
237 if (has_dequeue_callbacks) {
238 dequeue_cleanup_callback();
245 HRESULT STDMETHODCALLTYPE DeckLinkCapture::QueryInterface(REFIID, LPVOID *)
247 return E_NOINTERFACE;
250 ULONG STDMETHODCALLTYPE DeckLinkCapture::AddRef(void)
252 return refcount.fetch_add(1) + 1;
255 ULONG STDMETHODCALLTYPE DeckLinkCapture::Release(void)
257 int new_ref = refcount.fetch_sub(1) - 1;
263 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFormatChanged(
264 BMDVideoInputFormatChangedEvents,
265 IDeckLinkDisplayMode* display_mode,
266 BMDDetectedVideoInputFormatFlags)
268 if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
269 fprintf(stderr, "Could not get new frame rate\n");
272 field_dominance = display_mode->GetFieldDominance();
276 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFrameArrived(
277 IDeckLinkVideoInputFrame *video_frame,
278 IDeckLinkAudioInputPacket *audio_frame)
281 if (has_dequeue_callbacks) {
282 dequeue_init_callback();
287 FrameAllocator::Frame current_video_frame, current_audio_frame;
288 VideoFormat video_format;
289 AudioFormat audio_format;
291 video_format.frame_rate_nom = time_scale;
292 video_format.frame_rate_den = frame_duration;
293 // TODO: Respect the TFF/BFF flag.
294 video_format.interlaced = (field_dominance == bmdLowerFieldFirst || field_dominance == bmdUpperFieldFirst);
295 video_format.second_field_start = 1;
298 video_format.has_signal = !(video_frame->GetFlags() & bmdFrameHasNoInputSource);
300 int width = video_frame->GetWidth();
301 int height = video_frame->GetHeight();
302 const int stride = video_frame->GetRowBytes();
303 assert(stride == width * 2);
305 current_video_frame = video_frame_allocator->alloc_frame();
306 if (current_video_frame.data != nullptr) {
307 const uint8_t *frame_bytes;
308 video_frame->GetBytes((void **)&frame_bytes);
310 uint8_t *data = current_video_frame.data;
311 uint8_t *data2 = current_video_frame.data2;
312 size_t num_bytes = width * height * 2;
314 size_t consumed = memcpy_interleaved_fastpath(data, data2, frame_bytes, num_bytes);
315 frame_bytes += consumed;
316 data += consumed / 2;
317 data2 += consumed / 2;
321 current_video_frame.len += consumed;
322 num_bytes -= consumed;
326 memcpy_interleaved(data, data2, frame_bytes, num_bytes);
328 current_video_frame.len += num_bytes;
330 video_format.width = width;
331 video_format.height = height;
333 current_video_frame.received_timestamp = steady_clock::now();
338 int num_samples = audio_frame->GetSampleFrameCount();
340 current_audio_frame = audio_frame_allocator->alloc_frame();
341 if (current_audio_frame.data != nullptr) {
342 const uint8_t *frame_bytes;
343 audio_frame->GetBytes((void **)&frame_bytes);
344 current_audio_frame.len = sizeof(int32_t) * 2 * num_samples;
346 memcpy(current_audio_frame.data, frame_bytes, current_audio_frame.len);
348 audio_format.bits_per_sample = 32;
349 audio_format.num_channels = 2;
351 current_audio_frame.received_timestamp = steady_clock::now();
355 if (current_video_frame.data != nullptr || current_audio_frame.data != nullptr) {
356 // TODO: Put into a queue and put into a dequeue thread, if the
357 // BlackMagic drivers don't already do that for us?
358 frame_callback(timecode,
359 current_video_frame, /*video_offset=*/0, video_format,
360 current_audio_frame, /*audio_offset=*/0, audio_format);
367 void DeckLinkCapture::configure_card()
369 if (video_frame_allocator == nullptr) {
370 owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
371 set_video_frame_allocator(owned_video_frame_allocator.get());
373 if (audio_frame_allocator == nullptr) {
374 owned_audio_frame_allocator.reset(new MallocFrameAllocator(65536, NUM_QUEUED_AUDIO_FRAMES));
375 set_audio_frame_allocator(owned_audio_frame_allocator.get());
379 void DeckLinkCapture::start_bm_capture()
384 if (input->EnableVideoInput(current_video_mode, bmdFormat8BitYUV, 0) != S_OK) {
385 fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", current_video_mode, card_index);
388 if (input->EnableAudioInput(48000, bmdAudioSampleType32bitInteger, 2) != S_OK) {
389 fprintf(stderr, "Failed to enable audio input for card %d\n", card_index);
393 if (input->StartStreams() != S_OK) {
394 fprintf(stderr, "StartStreams failed\n");
400 void DeckLinkCapture::stop_dequeue_thread()
405 HRESULT result = input->StopStreams();
406 if (result != S_OK) {
407 fprintf(stderr, "StopStreams failed with error 0x%x\n", result);
410 if (input->DisableVideoInput() != S_OK) {
411 fprintf(stderr, "Failed to disable video input for card %d\n", card_index);
414 if (input->DisableAudioInput() != S_OK) {
415 fprintf(stderr, "Failed to disable audio input for card %d\n", card_index);
421 void DeckLinkCapture::set_video_mode(uint32_t video_mode_id)
423 if (input->StopStreams() != S_OK) {
424 fprintf(stderr, "StopStreams failed\n");
428 set_video_mode_no_restart(video_mode_id);
430 if (input->StartStreams() != S_OK) {
431 fprintf(stderr, "StartStreams failed\n");
436 void DeckLinkCapture::set_video_mode_no_restart(uint32_t video_mode_id)
438 BMDDisplayModeSupport support;
439 IDeckLinkDisplayMode *display_mode;
440 if (input->DoesSupportVideoMode(video_mode_id, bmdFormat8BitYUV, /*flags=*/0, &support, &display_mode)) {
441 fprintf(stderr, "Failed to query display mode for card %d\n", card_index);
445 if (support == bmdDisplayModeNotSupported) {
446 fprintf(stderr, "Card %d does not support display mode\n", card_index);
450 if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
451 fprintf(stderr, "Could not get frame rate for card %d\n", card_index);
455 field_dominance = display_mode->GetFieldDominance();
458 if (input->EnableVideoInput(video_mode_id, bmdFormat8BitYUV, 0) != S_OK) {
459 fprintf(stderr, "Failed to set video mode 0x%04x for card %d\n", video_mode_id, card_index);
464 current_video_mode = video_mode_id;
467 void DeckLinkCapture::set_video_input(uint32_t video_input_id)
469 if (config->SetInt(bmdDeckLinkConfigVideoInputConnection, video_input_id) != S_OK) {
470 fprintf(stderr, "Failed to set video input connection for card %d\n", card_index);
474 current_video_input = video_input_id;
477 void DeckLinkCapture::set_audio_input(uint32_t audio_input_id)
479 if (config->SetInt(bmdDeckLinkConfigAudioInputConnection, audio_input_id) != S_OK) {
480 fprintf(stderr, "Failed to set audio input connection for card %d\n", card_index);
484 current_audio_input = audio_input_id;