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