modules/access/decklink.cpp

   1 /*****************************************************************************
   2  * decklink.cpp: BlackMagic DeckLink SDI input module
   3  *****************************************************************************
   4  * Copyright (C) 2010 Steinar H. Gunderson
   5  * Copyright (C) 2012-2014 Rafaël Carré
   6  *
   7  * Authors: Steinar H. Gunderson <steinar+vlc@gunderson.no>
   8             Rafaël Carré <funman@videolanorg>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc_common.h>
  30 #include <vlc_plugin.h>
  31 #include <vlc_demux.h>
  32
  33 #ifdef HAVE_ARPA_INET_H
  34 #include <arpa/inet.h>
  35 #endif
  36
  37 #include <DeckLinkAPI.h>
  38 #include <DeckLinkAPIDispatch.cpp>
  39
  40 #include "sdi.h"
  41
  42 #include <atomic>
  43
  44 static int  Open (vlc_object_t *);
  45 static void Close(vlc_object_t *);
  46
  47 #define CARD_INDEX_TEXT N_("Input card to use")
  48 #define CARD_INDEX_LONGTEXT N_( \
  49     "DeckLink capture card to use, if multiple exist. " \
  50     "The cards are numbered from 0.")
  51
  52 #define MODE_TEXT N_("Desired input video mode. Leave empty for autodetection.")
  53 #define MODE_LONGTEXT N_( \
  54     "Desired input video mode for DeckLink captures. " \
  55     "This value should be a FOURCC code in textual " \
  56     "form, e.g. \"ntsc\".")
  57
  58 #define AUDIO_CONNECTION_TEXT N_("Audio connection")
  59 #define AUDIO_CONNECTION_LONGTEXT N_( \
  60     "Audio connection to use for DeckLink captures. " \
  61     "Valid choices: embedded, aesebu, analog. " \
  62     "Leave blank for card default.")
  63
  64 #define RATE_TEXT N_("Audio samplerate (Hz)")
  65 #define RATE_LONGTEXT N_( \
  66     "Audio sampling rate (in hertz) for DeckLink captures. " \
  67     "0 disables audio input.")
  68
  69 #define CHANNELS_TEXT N_("Number of audio channels")
  70 #define CHANNELS_LONGTEXT N_( \
  71     "Number of input audio channels for DeckLink captures. " \
  72     "Must be 2, 8 or 16. 0 disables audio input.")
  73
  74 #define VIDEO_CONNECTION_TEXT N_("Video connection")
  75 #define VIDEO_CONNECTION_LONGTEXT N_( \
  76     "Video connection to use for DeckLink captures. " \
  77     "Valid choices: sdi, hdmi, opticalsdi, component, " \
  78     "composite, svideo. " \
  79     "Leave blank for card default.")
  80
  81 static const char *const ppsz_videoconns[] = {
  82     "sdi", "hdmi", "opticalsdi", "component", "composite", "svideo"
  83 };
  84 static const char *const ppsz_videoconns_text[] = {
  85     N_("SDI"), N_("HDMI"), N_("Optical SDI"), N_("Component"), N_("Composite"), N_("S-Video")
  86 };
  87
  88 static const char *const ppsz_audioconns[] = {
  89     "embedded", "aesebu", "analog"
  90 };
  91 static const char *const ppsz_audioconns_text[] = {
  92     N_("Embedded"), N_("AES/EBU"), N_("Analog")
  93 };
  94
  95 #define ASPECT_RATIO_TEXT N_("Aspect ratio")
  96 #define ASPECT_RATIO_LONGTEXT N_(\
  97     "Aspect ratio (4:3, 16:9). Default assumes square pixels.")
  98
  99 vlc_module_begin ()
 100     set_shortname(N_("DeckLink"))
 101     set_description(N_("Blackmagic DeckLink SDI input"))
 102     set_category(CAT_INPUT)
 103     set_subcategory(SUBCAT_INPUT_ACCESS)
 104
 105     add_integer("decklink-card-index", 0,
 106                  CARD_INDEX_TEXT, CARD_INDEX_LONGTEXT, true)
 107     add_string("decklink-mode", NULL,
 108                  MODE_TEXT, MODE_LONGTEXT, true)
 109     add_string("decklink-audio-connection", 0,
 110                  AUDIO_CONNECTION_TEXT, AUDIO_CONNECTION_LONGTEXT, true)
 111         change_string_list(ppsz_audioconns, ppsz_audioconns_text)
 112     add_integer("decklink-audio-rate", 48000,
 113                  RATE_TEXT, RATE_LONGTEXT, true)
 114     add_integer("decklink-audio-channels", 2,
 115                  CHANNELS_TEXT, CHANNELS_LONGTEXT, true)
 116     add_string("decklink-video-connection", 0,
 117                  VIDEO_CONNECTION_TEXT, VIDEO_CONNECTION_LONGTEXT, true)
 118         change_string_list(ppsz_videoconns, ppsz_videoconns_text)
 119     add_string("decklink-aspect-ratio", NULL,
 120                 ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, true)
 121     add_bool("decklink-tenbits", false, N_("10 bits"), N_("10 bits"), true)
 122
 123     add_shortcut("decklink")
 124     set_capability("access", 0)
 125     set_callbacks(Open, Close)
 126 vlc_module_end ()
 127
 128 static int Control(demux_t *, int, va_list);
 129
 130 class DeckLinkCaptureDelegate;
 131
 132 struct demux_sys_t
 133 {
 134     IDeckLink *card;
 135     IDeckLinkInput *input;
 136     DeckLinkCaptureDelegate *delegate;
 137
 138     /* We need to hold onto the IDeckLinkConfiguration object, or our settings will not apply.
 139        See section 2.4.15 of the Blackmagic DeckLink SDK documentation. */
 140     IDeckLinkConfiguration *config;
 141     IDeckLinkAttributes *attributes;
 142
 143     bool autodetect;
 144
 145     es_out_id_t *video_es;
 146     es_format_t video_fmt;
 147     es_out_id_t *audio_es;
 148     es_out_id_t *cc_es;
 149
 150     vlc_mutex_t pts_lock;
 151     int last_pts;  /* protected by <pts_lock> */
 152
 153     uint32_t dominance_flags;
 154     int channels;
 155
 156     bool tenbits;
 157 };
 158
 159 static const char *GetFieldDominance(BMDFieldDominance dom, uint32_t *flags)
 160 {
 161     switch(dom)
 162     {
 163         case bmdProgressiveFrame:
 164             return "";
 165         case bmdProgressiveSegmentedFrame:
 166             return ", segmented";
 167         case bmdLowerFieldFirst:
 168             *flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
 169             return ", interlaced [BFF]";
 170         case bmdUpperFieldFirst:
 171             *flags = BLOCK_FLAG_TOP_FIELD_FIRST;
 172             return ", interlaced [TFF]";
 173         case bmdUnknownFieldDominance:
 174         default:
 175             return ", unknown field dominance";
 176     }
 177 }
 178
 179 static es_format_t GetModeSettings(demux_t *demux, IDeckLinkDisplayMode *m,
 180         BMDDetectedVideoInputFormatFlags fmt_flags)
 181 {
 182     demux_sys_t *sys = (demux_sys_t *)demux->p_sys;
 183     uint32_t flags = 0;
 184     (void)GetFieldDominance(m->GetFieldDominance(), &flags);
 185
 186     BMDTimeValue frame_duration, time_scale;
 187     if (m->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
 188         time_scale = 0;
 189         frame_duration = 1;
 190     }
 191
 192     es_format_t video_fmt;
 193     vlc_fourcc_t chroma = 0;
 194     switch (fmt_flags) {
 195         case bmdDetectedVideoInputYCbCr422:
 196             chroma = sys->tenbits ? VLC_CODEC_I422_10L : VLC_CODEC_UYVY;
 197             break;
 198         case bmdDetectedVideoInputRGB444:
 199             chroma = VLC_CODEC_ARGB;
 200             break;
 201         default:
 202             msg_Err(demux, "Unsupported input format");
 203             break;
 204     }
 205     es_format_Init(&video_fmt, VIDEO_ES, chroma);
 206
 207     video_fmt.video.i_chroma = chroma;
 208     video_fmt.video.i_width = m->GetWidth();
 209     video_fmt.video.i_height = m->GetHeight();
 210     video_fmt.video.i_sar_num = 1;
 211     video_fmt.video.i_sar_den = 1;
 212     video_fmt.video.i_frame_rate = time_scale;
 213     video_fmt.video.i_frame_rate_base = frame_duration;
 214     video_fmt.i_bitrate = video_fmt.video.i_width * video_fmt.video.i_height * video_fmt.video.i_frame_rate * 2 * 8;
 215
 216     unsigned aspect_num, aspect_den;
 217     if (!var_InheritURational(demux, &aspect_num, &aspect_den, "decklink-aspect-ratio") &&
 218          aspect_num > 0 && aspect_den > 0) {
 219         video_fmt.video.i_sar_num = aspect_num * video_fmt.video.i_height;
 220         video_fmt.video.i_sar_den = aspect_den * video_fmt.video.i_width;
 221     }
 222
 223     sys->dominance_flags = flags;
 224
 225     return video_fmt;
 226 }
 227
 228 class DeckLinkCaptureDelegate : public IDeckLinkInputCallback
 229 {
 230 public:
 231     DeckLinkCaptureDelegate(demux_t *demux) : demux_(demux)
 232     {
 233         m_ref_.store(1);
 234     }
 235
 236     virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, LPVOID *) { return E_NOINTERFACE; }
 237
 238     virtual ULONG STDMETHODCALLTYPE AddRef(void)
 239     {
 240         return m_ref_.fetch_add(1);
 241     }
 242
 243     virtual ULONG STDMETHODCALLTYPE Release(void)
 244     {
 245         uintptr_t new_ref = m_ref_.fetch_sub(1);
 246         if (new_ref == 0)
 247             delete this;
 248         return new_ref;
 249     }
 250
 251     virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode, BMDDetectedVideoInputFormatFlags flags)
 252     {
 253         demux_sys_t *sys = static_cast<demux_sys_t *>(demux_->p_sys);
 254
 255         if( !(events & bmdVideoInputDisplayModeChanged ))
 256             return S_OK;
 257
 258         const char *mode_name;
 259         if (mode->GetName(&mode_name) != S_OK)
 260             mode_name = "unknown";
 261
 262         msg_Dbg(demux_, "Video input format changed to %s", mode_name);
 263         if (!sys->autodetect) {
 264             msg_Err(demux_, "Video format detection disabled");
 265             return S_OK;
 266         }
 267
 268         BMDPixelFormat fmt = 0;
 269         switch (flags) {
 270             case bmdDetectedVideoInputYCbCr422:
 271                 fmt = sys->tenbits ? bmdFormat10BitYUV : bmdFormat8BitYUV;
 272                 break;
 273             case bmdDetectedVideoInputRGB444:
 274                 fmt = bmdFormat8BitARGB;
 275                 break;
 276             default:
 277                 msg_Err(demux_, "Unsupported input format");
 278                 return S_OK;
 279         }
 280
 281         es_out_Del(demux_->out, sys->video_es);
 282         sys->video_fmt = GetModeSettings(demux_, mode, flags);
 283         sys->video_es = es_out_Add(demux_->out, &sys->video_fmt);
 284
 285         sys->input->PauseStreams();
 286         sys->input->EnableVideoInput( mode->GetDisplayMode(), fmt, bmdVideoInputEnableFormatDetection );
 287         sys->input->FlushStreams();
 288         sys->input->StartStreams();
 289
 290         return S_OK;
 291     }
 292
 293     virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);
 294
 295 private:
 296     std::atomic_uint m_ref_;
 297     demux_t *demux_;
 298 };
 299
 300 HRESULT DeckLinkCaptureDelegate::VideoInputFrameArrived(IDeckLinkVideoInputFrame* videoFrame, IDeckLinkAudioInputPacket* audioFrame)
 301 {
 302     demux_sys_t *sys = static_cast<demux_sys_t *>(demux_->p_sys);
 303
 304     if (videoFrame) {
 305         if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
 306             msg_Warn(demux_, "No input signal detected (%dx%d)",
 307                             videoFrame->GetWidth(), videoFrame->GetHeight());
 308             return S_OK;
 309         }
 310
 311         const int width = videoFrame->GetWidth();
 312         const int height = videoFrame->GetHeight();
 313         const int stride = videoFrame->GetRowBytes();
 314
 315         int bpp = 0;
 316         switch (sys->video_fmt.i_codec) {
 317             case VLC_CODEC_I422_10L:
 318             case VLC_CODEC_ARGB:
 319                 bpp = 4;
 320                 break;
 321             case VLC_CODEC_UYVY:
 322                 bpp = 2;
 323                 break;
 324         };
 325         block_t *video_frame = block_Alloc(width * height * bpp);
 326         if (!video_frame)
 327             return S_OK;
 328
 329         const uint32_t *frame_bytes;
 330         videoFrame->GetBytes((void**)&frame_bytes);
 331
 332         BMDTimeValue stream_time, frame_duration;
 333         videoFrame->GetStreamTime(&stream_time, &frame_duration, CLOCK_FREQ);
 334         video_frame->i_flags = BLOCK_FLAG_TYPE_I | sys->dominance_flags;
 335         video_frame->i_pts = video_frame->i_dts = VLC_TS_0 + stream_time;
 336
 337         if (sys->video_fmt.i_codec == VLC_CODEC_I422_10L) {
 338             v210_convert((uint16_t*)video_frame->p_buffer, frame_bytes, width, height);
 339             IDeckLinkVideoFrameAncillary *vanc;
 340             if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
 341                 for (int i = 1; i < 21; i++) {
 342                     uint32_t *buf;
 343                     if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) != S_OK)
 344                         break;
 345                     uint16_t dec[width * 2];
 346                     v210_convert(&dec[0], buf, width, 1);
 347                     block_t *cc = vanc_to_cc(demux_, dec, width * 2);
 348                     if (!cc)
 349                         continue;
 350                     cc->i_pts = cc->i_dts = VLC_TS_0 + stream_time;
 351
 352                     if (!sys->cc_es) {
 353                         es_format_t fmt;
 354
 355                         es_format_Init( &fmt, SPU_ES, VLC_CODEC_CEA608 );
 356                         fmt.psz_description = strdup(N_("Closed captions 1"));
 357                         if (fmt.psz_description) {
 358                             sys->cc_es = es_out_Add(demux_->out, &fmt);
 359                             msg_Dbg(demux_, "Adding Closed captions stream");
 360                         }
 361                     }
 362                     if (sys->cc_es)
 363                         es_out_Send(demux_->out, sys->cc_es, cc);
 364                     else
 365                         block_Release(cc);
 366                     break; // we found the line with Closed Caption data
 367                 }
 368                 vanc->Release();
 369             }
 370         } else if (sys->video_fmt.i_codec == VLC_CODEC_UYVY) {
 371             for (int y = 0; y < height; ++y) {
 372                 const uint8_t *src = (const uint8_t *)frame_bytes + stride * y;
 373                 uint8_t *dst = video_frame->p_buffer + width * 2 * y;
 374                 memcpy(dst, src, width * 2);
 375             }
 376         } else {
 377                 memcpy(video_frame->p_buffer, frame_bytes, width * height * bpp);
 378         }
 379
 380         vlc_mutex_lock(&sys->pts_lock);
 381         if (video_frame->i_pts > sys->last_pts)
 382             sys->last_pts = video_frame->i_pts;
 383         vlc_mutex_unlock(&sys->pts_lock);
 384
 385         es_out_SetPCR(demux_->out, video_frame->i_pts);
 386         es_out_Send(demux_->out, sys->video_es, video_frame);
 387     }
 388
 389     if (audioFrame) {
 390         const int bytes = audioFrame->GetSampleFrameCount() * sizeof(int16_t) * sys->channels;
 391
 392         block_t *audio_frame = block_Alloc(bytes);
 393         if (!audio_frame)
 394             return S_OK;
 395
 396         void *frame_bytes;
 397         audioFrame->GetBytes(&frame_bytes);
 398         memcpy(audio_frame->p_buffer, frame_bytes, bytes);
 399
 400         BMDTimeValue packet_time;
 401         audioFrame->GetPacketTime(&packet_time, CLOCK_FREQ);
 402         audio_frame->i_pts = audio_frame->i_dts = VLC_TS_0 + packet_time;
 403
 404         vlc_mutex_lock(&sys->pts_lock);
 405         if (audio_frame->i_pts > sys->last_pts)
 406             sys->last_pts = audio_frame->i_pts;
 407         vlc_mutex_unlock(&sys->pts_lock);
 408
 409         es_out_SetPCR(demux_->out, audio_frame->i_pts);
 410         es_out_Send(demux_->out, sys->audio_es, audio_frame);
 411     }
 412
 413     return S_OK;
 414 }
 415
 416
 417 static int GetAudioConn(demux_t *demux)
 418 {
 419     demux_sys_t *sys = (demux_sys_t *)demux->p_sys;
 420
 421     char *opt = var_CreateGetNonEmptyString(demux, "decklink-audio-connection");
 422     if (!opt)
 423         return VLC_SUCCESS;
 424
 425     BMDAudioConnection c;
 426     if (!strcmp(opt, "embedded"))
 427         c = bmdAudioConnectionEmbedded;
 428     else if (!strcmp(opt, "aesebu"))
 429         c = bmdAudioConnectionAESEBU;
 430     else if (!strcmp(opt, "analog"))
 431         c = bmdAudioConnectionAnalog;
 432     else {
 433         msg_Err(demux, "Invalid audio-connection: `%s\' specified", opt);
 434         free(opt);
 435         return VLC_EGENERIC;
 436     }
 437
 438     if (sys->config->SetInt(bmdDeckLinkConfigAudioInputConnection, c) != S_OK) {
 439         msg_Err(demux, "Failed to set audio input connection");
 440         return VLC_EGENERIC;
 441     }
 442
 443     return VLC_SUCCESS;
 444 }
 445
 446 static int GetVideoConn(demux_t *demux)
 447 {
 448     demux_sys_t *sys = (demux_sys_t *)demux->p_sys;
 449
 450     char *opt = var_InheritString(demux, "decklink-video-connection");
 451     if (!opt)
 452         return VLC_SUCCESS;
 453
 454     BMDVideoConnection c;
 455     if (!strcmp(opt, "sdi"))
 456         c = bmdVideoConnectionSDI;
 457     else if (!strcmp(opt, "hdmi"))
 458         c = bmdVideoConnectionHDMI;
 459     else if (!strcmp(opt, "opticalsdi"))
 460         c = bmdVideoConnectionOpticalSDI;
 461     else if (!strcmp(opt, "component"))
 462         c = bmdVideoConnectionComponent;
 463     else if (!strcmp(opt, "composite"))
 464         c = bmdVideoConnectionComposite;
 465     else if (!strcmp(opt, "svideo"))
 466         c = bmdVideoConnectionSVideo;
 467     else {
 468         msg_Err(demux, "Invalid video-connection: `%s\' specified", opt);
 469         free(opt);
 470         return VLC_EGENERIC;
 471     }
 472
 473     free(opt);
 474     if (sys->config->SetInt(bmdDeckLinkConfigVideoInputConnection, c) != S_OK) {
 475         msg_Err(demux, "Failed to set video input connection");
 476         return VLC_EGENERIC;
 477     }
 478
 479     return VLC_SUCCESS;
 480 }
 481
 482 static int Open(vlc_object_t *p_this)
 483 {
 484     demux_t     *demux = (demux_t*)p_this;
 485     demux_sys_t *sys;
 486     int         ret = VLC_EGENERIC;
 487     int         card_index;
 488     int         physical_channels = 0;
 489     int         rate;
 490     BMDVideoInputFlags flags = bmdVideoInputFlagDefault;
 491
 492     if (demux->out == NULL)
 493         return VLC_EGENERIC;
 494
 495     /* Set up demux */
 496     demux->pf_demux = NULL;
 497     demux->pf_control = Control;
 498     demux->p_sys = sys = (demux_sys_t*)calloc(1, sizeof(demux_sys_t));
 499     if (!sys)
 500         return VLC_ENOMEM;
 501
 502     vlc_mutex_init(&sys->pts_lock);
 503
 504     sys->tenbits = var_InheritBool(p_this, "decklink-tenbits");
 505
 506     IDeckLinkIterator *decklink_iterator = CreateDeckLinkIteratorInstance();
 507     if (!decklink_iterator) {
 508         msg_Err(demux, "DeckLink drivers not found.");
 509         goto finish;
 510     }
 511
 512     card_index = var_InheritInteger(demux, "decklink-card-index");
 513     if (card_index < 0) {
 514         msg_Err(demux, "Invalid card index %d", card_index);
 515         goto finish;
 516     }
 517
 518     for (int i = 0; i <= card_index; i++) {
 519         if (sys->card)
 520             sys->card->Release();
 521         if (decklink_iterator->Next(&sys->card) != S_OK) {
 522             msg_Err(demux, "DeckLink PCI card %d not found", card_index);
 523             goto finish;
 524         }
 525     }
 526
 527     const char *model_name;
 528     if (sys->card->GetModelName(&model_name) != S_OK)
 529         model_name = "unknown";
 530
 531     msg_Dbg(demux, "Opened DeckLink PCI card %d (%s)", card_index, model_name);
 532
 533     if (sys->card->QueryInterface(IID_IDeckLinkInput, (void**)&sys->input) != S_OK) {
 534         msg_Err(demux, "Card has no inputs");
 535         goto finish;
 536     }
 537
 538     /* Set up the video and audio sources. */
 539     if (sys->card->QueryInterface(IID_IDeckLinkConfiguration, (void**)&sys->config) != S_OK) {
 540         msg_Err(demux, "Failed to get configuration interface");
 541         goto finish;
 542     }
 543
 544     if (sys->card->QueryInterface(IID_IDeckLinkAttributes, (void**)&sys->attributes) != S_OK) {
 545         msg_Err(demux, "Failed to get attributes interface");
 546         goto finish;
 547     }
 548
 549     if (GetVideoConn(demux) || GetAudioConn(demux))
 550         goto finish;
 551
 552     BMDPixelFormat fmt;
 553     fmt = sys->tenbits ? bmdFormat10BitYUV : bmdFormat8BitYUV;
 554     if (sys->attributes->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &sys->autodetect) != S_OK) {
 555         msg_Err(demux, "Failed to query card attribute");
 556         goto finish;
 557     }
 558
 559     /* Get the list of display modes. */
 560     IDeckLinkDisplayModeIterator *mode_it;
 561     if (sys->input->GetDisplayModeIterator(&mode_it) != S_OK) {
 562         msg_Err(demux, "Failed to enumerate display modes");
 563         goto finish;
 564     }
 565
 566     union {
 567         BMDDisplayMode id;
 568         char str[4];
 569     } u;
 570
 571     u.id = 0;
 572
 573     char *mode;
 574     mode = var_CreateGetNonEmptyString(demux, "decklink-mode");
 575     if (mode)
 576         sys->autodetect = false; // disable autodetection if mode was set
 577
 578     if (sys->autodetect) {
 579         msg_Dbg(demux, "Card supports input format detection");
 580         flags |= bmdVideoInputEnableFormatDetection;
 581         /* Enable a random format, we will reconfigure on format detection */
 582         u.id = htonl(bmdModeHD1080p2997);
 583     } else {
 584         if (!mode || strlen(mode) < 3 || strlen(mode) > 4) {
 585             msg_Err(demux, "Invalid mode: \'%s\'", mode ? mode : "");
 586             free(mode);
 587             goto finish;
 588         }
 589
 590         msg_Dbg(demux, "Looking for mode \'%s\'", mode);
 591         memcpy(u.str, mode, 4);
 592         if (u.str[3] == '\0')
 593             u.str[3] = ' '; /* 'pal'\0 -> 'pal ' */
 594         free(mode);
 595     }
 596
 597     sys->video_fmt.video.i_width = 0;
 598
 599     for (IDeckLinkDisplayMode *m;; m->Release()) {
 600         if ((mode_it->Next(&m) != S_OK) || !m)
 601             break;
 602
 603         const char *mode_name;
 604         BMDTimeValue frame_duration, time_scale;
 605         uint32_t field_flags;
 606         const char *field = GetFieldDominance(m->GetFieldDominance(), &field_flags);
 607         BMDDisplayMode id = ntohl(m->GetDisplayMode());
 608
 609         if (m->GetName(&mode_name) != S_OK)
 610             mode_name = "unknown";
 611         if (m->GetFrameRate(&frame_duration, &time_scale) != S_OK) {
 612             time_scale = 0;
 613             frame_duration = 1;
 614         }
 615
 616         msg_Dbg(demux, "Found mode '%4.4s': %s (%dx%d, %.3f fps%s)",
 617                  (char*)&id, mode_name,
 618                  (int)m->GetWidth(), (int)m->GetHeight(),
 619                  double(time_scale) / frame_duration, field);
 620
 621         if (u.id == id) {
 622             sys->video_fmt = GetModeSettings(demux, m, bmdDetectedVideoInputYCbCr422);
 623             msg_Dbg(demux, "Using that mode");
 624         }
 625     }
 626
 627     mode_it->Release();
 628
 629     if (sys->video_fmt.video.i_width == 0) {
 630         msg_Err(demux, "Unknown video mode `%4.4s\' specified.", (char*)&u.id);
 631         goto finish;
 632     }
 633
 634     if (sys->input->EnableVideoInput(htonl(u.id), fmt, flags) != S_OK) {
 635         msg_Err(demux, "Failed to enable video input");
 636         goto finish;
 637     }
 638
 639     /* Set up audio. */
 640     sys->channels = var_InheritInteger(demux, "decklink-audio-channels");
 641     switch (sys->channels) {
 642     case 0:
 643         break;
 644     case 2:
 645         physical_channels = AOUT_CHANS_STEREO;
 646         break;
 647     case 8:
 648         physical_channels = AOUT_CHANS_7_1;
 649         break;
 650     //case 16:
 651     default:
 652         msg_Err(demux, "Invalid number of channels (%d), disabling audio", sys->channels);
 653         sys->channels = 0;
 654     }
 655     rate = var_InheritInteger(demux, "decklink-audio-rate");
 656     if (rate > 0 && sys->channels > 0) {
 657         if (sys->input->EnableAudioInput(rate, bmdAudioSampleType16bitInteger, sys->channels) != S_OK) {
 658             msg_Err(demux, "Failed to enable audio input");
 659             goto finish;
 660         }
 661     }
 662
 663     sys->delegate = new DeckLinkCaptureDelegate(demux);
 664     sys->input->SetCallback(sys->delegate);
 665
 666     if (sys->input->StartStreams() != S_OK) {
 667         msg_Err(demux, "Could not start streaming from SDI card. This could be caused "
 668                           "by invalid video mode or flags, access denied, or card already in use.");
 669         goto finish;
 670     }
 671
 672     msg_Dbg(demux, "added new video es %4.4s %dx%d",
 673              (char*)&sys->video_fmt.i_codec, sys->video_fmt.video.i_width, sys->video_fmt.video.i_height);
 674     sys->video_es = es_out_Add(demux->out, &sys->video_fmt);
 675
 676     es_format_t audio_fmt;
 677     es_format_Init(&audio_fmt, AUDIO_ES, VLC_CODEC_S16N);
 678     audio_fmt.audio.i_channels = sys->channels;
 679     audio_fmt.audio.i_physical_channels = physical_channels;
 680     audio_fmt.audio.i_rate = rate;
 681     audio_fmt.audio.i_bitspersample = 16;
 682     audio_fmt.audio.i_blockalign = audio_fmt.audio.i_channels * audio_fmt.audio.i_bitspersample / 8;
 683     audio_fmt.i_bitrate = audio_fmt.audio.i_channels * audio_fmt.audio.i_rate * audio_fmt.audio.i_bitspersample;
 684
 685     msg_Dbg(demux, "added new audio es %4.4s %dHz %dbpp %dch",
 686              (char*)&audio_fmt.i_codec, audio_fmt.audio.i_rate, audio_fmt.audio.i_bitspersample, audio_fmt.audio.i_channels);
 687     sys->audio_es = es_out_Add(demux->out, &audio_fmt);
 688
 689     ret = VLC_SUCCESS;
 690
 691 finish:
 692     if (decklink_iterator)
 693         decklink_iterator->Release();
 694
 695     if (ret != VLC_SUCCESS)
 696         Close(p_this);
 697
 698     return ret;
 699 }
 700
 701 static void Close(vlc_object_t *p_this)
 702 {
 703     demux_t     *demux = (demux_t *)p_this;
 704     demux_sys_t *sys = (demux_sys_t *)demux->p_sys;
 705
 706     if (sys->attributes)
 707         sys->attributes->Release();
 708
 709     if (sys->config)
 710         sys->config->Release();
 711
 712     if (sys->input) {
 713         sys->input->StopStreams();
 714         sys->input->Release();
 715     }
 716
 717     if (sys->card)
 718         sys->card->Release();
 719
 720     if (sys->delegate)
 721         sys->delegate->Release();
 722
 723     vlc_mutex_destroy(&sys->pts_lock);
 724     free(sys);
 725 }
 726
 727 static int Control(demux_t *demux, int query, va_list args)
 728 {
 729     demux_sys_t *sys = (demux_sys_t *)demux->p_sys;
 730     bool *pb;
 731     int64_t *pi64;
 732
 733     switch(query)
 734     {
 735         /* Special for access_demux */
 736         case DEMUX_CAN_PAUSE:
 737         case DEMUX_CAN_SEEK:
 738         case DEMUX_CAN_CONTROL_PACE:
 739             pb = va_arg(args, bool *);
 740             *pb = false;
 741             return VLC_SUCCESS;
 742
 743         case DEMUX_GET_PTS_DELAY:
 744             pi64 = va_arg(args, int64_t *);
 745             *pi64 = INT64_C(1000) * var_InheritInteger(demux, "live-caching");
 746             return VLC_SUCCESS;
 747
 748         case DEMUX_GET_TIME:
 749             pi64 = va_arg(args, int64_t *);
 750             vlc_mutex_lock(&sys->pts_lock);
 751             *pi64 = sys->last_pts;
 752             vlc_mutex_unlock(&sys->pts_lock);
 753             return VLC_SUCCESS;
 754
 755         default:
 756             return VLC_EGENERIC;
 757     }
 758 }