]> git.sesse.net Git - nageru/blob - decklink_capture.cpp
Split DeckLink mode summarization into a separate shared file.
[nageru] / decklink_capture.cpp
1 #include "decklink_capture.h"
2
3 #include <DeckLinkAPI.h>
4 #include <DeckLinkAPIConfiguration.h>
5 #include <DeckLinkAPIDiscovery.h>
6 #include <DeckLinkAPIModes.h>
7 #include <assert.h>
8 #ifdef __SSE2__
9 #include <immintrin.h>
10 #endif
11 #include <stdint.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <chrono>
16 #include <cstdint>
17 #include <utility>
18 #include <vector>
19
20 #include "bmusb/bmusb.h"
21 #include "decklink_util.h"
22
23 #define FRAME_SIZE (8 << 20)  // 8 MB.
24
25 using namespace std;
26 using namespace std::chrono;
27 using namespace std::placeholders;
28 using namespace bmusb;
29
30 namespace {
31
32 // TODO: Support stride.
33 void memcpy_interleaved(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
34 {
35         assert(n % 2 == 0);
36         uint8_t *dptr1 = dest1;
37         uint8_t *dptr2 = dest2;
38
39         for (size_t i = 0; i < n; i += 2) {
40                 *dptr1++ = *src++;
41                 *dptr2++ = *src++;
42         }
43 }
44
45 #ifdef __SSE2__
46
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)
49 {
50         const uint8_t *limit = src + n;
51         size_t consumed = 0;
52
53         // Align end to 32 bytes.
54         limit = (const uint8_t *)(intptr_t(limit) & ~31);
55
56         if (src >= limit) {
57                 return 0;
58         }
59
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);
65                 dest1 += n2 / 2;
66                 dest2 += n2 / 2;
67                 if (n2 % 2) {
68                         swap(dest1, dest2);
69                 }
70                 src = aligned_src;
71                 consumed += n2;
72         }
73
74         // Make the length a multiple of 64.
75         if (((limit - src) % 64) != 0) {
76                 limit -= 32;
77         }
78         assert(((limit - src) % 64) == 0);
79
80 #if __AVX2__
81         const __m256i * __restrict in = (const __m256i *)src;
82         __m256i * __restrict out1 = (__m256i *)dest1;
83         __m256i * __restrict out2 = (__m256i *)dest2;
84
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
92
93                 data1 = _mm256_shuffle_epi8(data1, shuffle_cw);       // ABCDabcd EFGHefgh
94                 data2 = _mm256_shuffle_epi8(data2, shuffle_cw);       // IJKLijkl MNOPmnop
95         
96                 data1 = _mm256_permute4x64_epi64(data1, 0b11011000);  // ABCDEFGH abcdefgh
97                 data2 = _mm256_permute4x64_epi64(data2, 0b11011000);  // IJKLMNOP ijklmnop
98
99                 __m256i lo = _mm256_permute2x128_si256(data1, data2, 0b00100000);
100                 __m256i hi = _mm256_permute2x128_si256(data1, data2, 0b00110001);
101
102                 _mm256_storeu_si256(out1, lo);
103                 _mm256_storeu_si256(out2, hi);
104
105                 in += 2;
106                 ++out1;
107                 ++out2;
108                 consumed += 64;
109         }
110 #else
111         const __m128i * __restrict in = (const __m128i *)src;
112         __m128i * __restrict out1 = (__m128i *)dest1;
113         __m128i * __restrict out2 = (__m128i *)dest2;
114
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);
127
128                 in += 2;
129                 ++out1;
130                 ++out2;
131                 consumed += 32;
132         }
133 #endif
134
135         return consumed;
136 }
137
138 #endif  // __SSE2__
139
140 }  // namespace
141
142 DeckLinkCapture::DeckLinkCapture(IDeckLink *card, int card_index)
143         : card_index(card_index), card(card)
144 {
145         {
146                 const char *model_name;
147                 char buf[256];
148                 if (card->GetModelName(&model_name) == S_OK) {
149                         snprintf(buf, sizeof(buf), "PCI card %d: %s", card_index, model_name);
150                 } else {
151                         snprintf(buf, sizeof(buf), "PCI card %d: Unknown DeckLink card", card_index);
152                 }
153                 description = buf;
154         }
155
156         if (card->QueryInterface(IID_IDeckLinkInput, (void**)&input) != S_OK) {
157                 fprintf(stderr, "Card %d has no inputs\n", card_index);
158                 exit(1);
159         }
160
161         IDeckLinkAttributes *attr;
162         if (card->QueryInterface(IID_IDeckLinkAttributes, (void**)&attr) != S_OK) {
163                 fprintf(stderr, "Card %d has no attributes\n", card_index);
164                 exit(1);
165         }
166
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);
171                 exit(1);
172         }
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" }
180         };
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);
184                 }
185         }
186
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);
191                 exit(1);
192         }
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" }
201         };
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);
205                 }
206         }
207
208         attr->Release();
209
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);
213                 exit(1);
214         }
215
216         set_video_input(bmdVideoConnectionHDMI);
217         set_audio_input(bmdAudioConnectionEmbedded);
218
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);
222                 exit(1);
223         }
224
225         video_modes = summarize_video_modes(mode_it, card_index);
226         mode_it->Release();
227
228         set_video_mode_no_restart(bmdModeHD720p5994);
229
230         input->SetCallback(this);
231 }
232
233 DeckLinkCapture::~DeckLinkCapture()
234 {
235         if (has_dequeue_callbacks) {
236                 dequeue_cleanup_callback();
237         }
238         input->Release();
239         config->Release();
240         card->Release();
241 }
242
243 HRESULT STDMETHODCALLTYPE DeckLinkCapture::QueryInterface(REFIID, LPVOID *)
244 {
245         return E_NOINTERFACE;
246 }
247
248 ULONG STDMETHODCALLTYPE DeckLinkCapture::AddRef(void)
249 {
250         return refcount.fetch_add(1) + 1;
251 }
252
253 ULONG STDMETHODCALLTYPE DeckLinkCapture::Release(void)
254 {
255         int new_ref = refcount.fetch_sub(1) - 1;
256         if (new_ref == 0)
257                 delete this;
258         return new_ref;
259 }
260
261 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFormatChanged(
262         BMDVideoInputFormatChangedEvents,
263         IDeckLinkDisplayMode* display_mode,
264         BMDDetectedVideoInputFormatFlags)
265 {
266         if (display_mode->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
267                 fprintf(stderr, "Could not get new frame rate\n");
268                 exit(1);
269         }
270         field_dominance = display_mode->GetFieldDominance();
271         return S_OK;
272 }
273
274 HRESULT STDMETHODCALLTYPE DeckLinkCapture::VideoInputFrameArrived(
275         IDeckLinkVideoInputFrame *video_frame,
276         IDeckLinkAudioInputPacket *audio_frame)
277 {
278         if (!done_init) {
279                 if (has_dequeue_callbacks) {
280                         dequeue_init_callback();
281                 }
282                 done_init = true;
283         }
284
285         FrameAllocator::Frame current_video_frame, current_audio_frame;
286         VideoFormat video_format;
287         AudioFormat audio_format;
288
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;
294
295         if (video_frame) {
296                 video_format.has_signal = !(video_frame->GetFlags() & bmdFrameHasNoInputSource);
297
298                 int width = video_frame->GetWidth();
299                 int height = video_frame->GetHeight();
300                 const int stride = video_frame->GetRowBytes();
301                 assert(stride == width * 2);
302
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);
307
308                         uint8_t *data = current_video_frame.data;
309                         uint8_t *data2 = current_video_frame.data2;
310                         size_t num_bytes = width * height * 2;
311 #ifdef __SSE2__
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;
316                         if (num_bytes % 2) {
317                                 swap(data, data2);
318                         }
319                         current_video_frame.len += consumed;
320                         num_bytes -= consumed;
321 #endif
322
323                         if (num_bytes > 0) {
324                                 memcpy_interleaved(data, data2, frame_bytes, num_bytes);
325                         }
326                         current_video_frame.len += num_bytes;
327
328                         video_format.width = width;
329                         video_format.height = height;
330
331                         current_video_frame.received_timestamp = steady_clock::now();
332                 }
333         }
334
335         if (audio_frame) {
336                 int num_samples = audio_frame->GetSampleFrameCount();
337
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;
343
344                         memcpy(current_audio_frame.data, frame_bytes, current_audio_frame.len);
345
346                         audio_format.bits_per_sample = 32;
347                         audio_format.num_channels = 2;
348
349                         current_audio_frame.received_timestamp = steady_clock::now();
350                 }
351         }
352
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);
359         }
360
361         timecode++;
362         return S_OK;
363 }
364
365 void DeckLinkCapture::configure_card()
366 {
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());
370         }
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());
374         }
375 }
376
377 void DeckLinkCapture::start_bm_capture()
378 {
379         if (running) {
380                 return;
381         }
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);
384                 exit(1);
385         }
386         if (input->EnableAudioInput(48000, bmdAudioSampleType32bitInteger, 2) != S_OK) {
387                 fprintf(stderr, "Failed to enable audio input for card %d\n", card_index);
388                 exit(1);
389         }
390
391         if (input->StartStreams() != S_OK) {
392                 fprintf(stderr, "StartStreams failed\n");
393                 exit(1);
394         }
395         running = true;
396 }
397
398 void DeckLinkCapture::stop_dequeue_thread()
399 {
400         if (!running) {
401                 return;
402         }
403         HRESULT result = input->StopStreams();
404         if (result != S_OK) {
405                 fprintf(stderr, "StopStreams failed with error 0x%x\n", result);
406                 exit(1);
407         }
408         if (input->DisableVideoInput() != S_OK) {
409                 fprintf(stderr, "Failed to disable video input for card %d\n", card_index);
410                 exit(1);
411         }
412         if (input->DisableAudioInput() != S_OK) {
413                 fprintf(stderr, "Failed to disable audio input for card %d\n", card_index);
414                 exit(1);
415         }
416         running = false;
417 }
418
419 void DeckLinkCapture::set_video_mode(uint32_t video_mode_id)
420 {
421         if (input->StopStreams() != S_OK) {
422                 fprintf(stderr, "StopStreams failed\n");
423                 exit(1);
424         }
425
426         set_video_mode_no_restart(video_mode_id);
427
428         if (input->StartStreams() != S_OK) {
429                 fprintf(stderr, "StartStreams failed\n");
430                 exit(1);
431         }
432 }
433
434 void DeckLinkCapture::set_video_mode_no_restart(uint32_t video_mode_id)
435 {
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);
440                 exit(1);
441         }
442
443         if (support == bmdDisplayModeNotSupported) {
444                 fprintf(stderr, "Card %d does not support display mode\n", card_index);
445                 exit(1);
446         }
447
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);
450                 exit(1);
451         }
452
453         field_dominance = display_mode->GetFieldDominance();
454
455         if (running) {
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);
458                         exit(1);
459                 }
460         }
461
462         current_video_mode = video_mode_id;
463 }
464
465 void DeckLinkCapture::set_video_input(uint32_t video_input_id)
466 {
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);
469                 exit(1);
470         }
471
472         current_video_input = video_input_id;
473 }
474
475 void DeckLinkCapture::set_audio_input(uint32_t audio_input_id)
476 {
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);
479                 exit(1);
480         }
481
482         current_audio_input = audio_input_id;
483 }