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