decklink.cpp File Reference

#include <DeckLinkAPIVersion.h>
#include <algorithm>
#include <array>
#include <atomic>
#include <cctype>
#include <chrono>
#include <cinttypes>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <exception>
#include <iostream>
#include <iterator>
#include <map>
#include <memory>
#include <mutex>
#include <queue>
#include <sstream>
#include <stdexcept>
#include <string>
#include <utility>
#include <vector>
#include "audio/types.h"
#include "blackmagic_common.hpp"
#include "compat/htonl.h"
#include "compat/strings.h"
#include "debug.h"
#include "host.h"
#include "lib_common.h"
#include "module.h"
#include "tv.h"
#include "ug_runtime_error.hpp"
#include "utils/macros.h"
#include "utils/math.h"
#include "utils/misc.h"
#include "utils/string.h"
#include "video.h"
#include "video_display.h"
#include "video_display/decklink_drift_fix.hpp"

Include dependency graph for decklink.cpp:

Go to the source code of this file.

Classes
struct	state_decklink
struct	state_decklink::aud_desc
struct	state_decklink::vid_desc

Macros
#define	CALL_AND_CHECK(cmd, name)
#define	CHECK_CH_COUNT(channels)
	only 2, 8, 16, 32 and 64 are supported according to BMD SDK doc
#define	DECKLINK_MAGIC   to_fourcc('v', 'd', 'D', 'L')
#define	EXIT_IF_FAILED(cmd, name)
#define	MOD_NAME   "[DeckLink display] "
#define	RELEASE_IF_NOT_NULL(x)
#define	STDMETHODCALLTYPE

Typedefs
using	hrc = std::chrono::high_resolution_clock

Functions
static DeckLinkFrame *	allocate_new_decklink_frame (struct state_decklink *s)
static void	debug_print_metadata_id (const char *fn_name, BMDDeckLinkFrameMetadataID metadataID)
static void	display_decklink_done (void *state)
static bool	display_decklink_get_property (void *state, int property, void *val, size_t *len)
static struct video_frame *	display_decklink_getf (void *state)
static void *	display_decklink_init (struct module *parent, const char *fmt, unsigned int flags)
static void	display_decklink_probe (struct device_info **available_cards, int *count, void(**deleter)(void *))
static void	display_decklink_put_audio_frame (void *state, const struct audio_frame *frame)
static bool	display_decklink_putf (void *state, struct video_frame *frame, long long timeout_ns)
static bool	display_decklink_reconfigure (void *state, struct video_desc desc)
static bool	display_decklink_reconfigure_audio (void *state, int quant_samples, int channels, int sample_rate)
static bool	enable_audio (struct state_decklink *s, int bps, int channels)
static BMDDisplayMode	get_mode (IDeckLinkOutput *deckLinkOutput, struct video_desc desc, BMDTimeValue *frameRateDuration, BMDTimeScale *frameRateScale, bool stereo)
static bool	operator== (const REFIID &first, const REFIID &second)
static void	print_output_modes (IDeckLink *deckLink, const char *query_prop_fcc)
	REGISTER_MODULE (decklink, &display_decklink_info, LIBRARY_CLASS_VIDEO_DISPLAY, VIDEO_DISPLAY_ABI_VERSION)
static void	set_audio_props (state_decklink *s, IDeckLinkConfiguration *deckLinkConfiguration, unsigned int audio_output)
static void	set_low_latency (struct state_decklink *s, bool on)
static bool	settings_init (struct state_decklink *s, const char *fmt, string &cardId)
static void	show_help (bool full, const char *query_prop_fcc=nullptr)
static void	update_timecode (DeckLinkTimecode *tc, double fps)

Variables
static const struct video_display_info	display_decklink_info

Detailed Description

Author

Martin Benes marti.nosp@m.nben.nosp@m.esh@g.nosp@m.mail.nosp@m..com

Lukas Hejtmanek xhejt.nosp@m.man@.nosp@m.ics.m.nosp@m.uni..nosp@m.cz

Petr Holub hopet.nosp@m.@ics.nosp@m..muni.nosp@m..cz

Milos Liska xlisk.nosp@m.a@fi.nosp@m..muni.nosp@m..cz

Jiri Matela matel.nosp@m.a@ic.nosp@m.s.mun.nosp@m.i.cz

Dalibor Matura 25589.nosp@m.9@ma.nosp@m.il.mu.nosp@m.ni.c.nosp@m.z

Martin Pulec pulec.nosp@m.@ces.nosp@m.net.c.nosp@m.z

TestPattern example from BMD SDK was used to consult correct BMD workflow usage and also SignalGenerator was used for scheduled playback.

Definition in file decklink.cpp.

Macro Definition Documentation

CALL_AND_CHECK

#define CALL_AND_CHECK	(		cmd,
			name )

Value:

        do {\
                const HRESULT result = cmd;\
                if (FAILED(result)) {;\
                        LOG(LOG_LEVEL_WARNING) << MOD_NAME << name << ": " << bmd_hresult_to_string(result) << "\n";\
                }\
        } while (0)

Definition at line 114 of file decklink.cpp.

#define CALL_AND_CHECK(cmd, name) \
        do {\
                const HRESULT result = cmd;\
                if (FAILED(result)) {;\
                        LOG(LOG_LEVEL_WARNING) << MOD_NAME << name << ": " << bmd_hresult_to_string(result) << "\n";\
                }\
        } while (0)

Referenced by display_decklink_reconfigure().

CHECK_CH_COUNT

#define CHECK_CH_COUNT

(

channels

)

Value:

        assert((channels) >= 2 && (channels) != 4 && (channels) <= 64 && \
               is_power_of_two((channels)))

only 2, 8, 16, 32 and 64 are supported according to BMD SDK doc

Definition at line 1325 of file decklink.cpp.

#define CHECK_CH_COUNT(channels) \
        assert((channels) >= 2 && (channels) != 4 && (channels) <= 64 && \
               is_power_of_two((channels)))

Referenced by display_decklink_reconfigure_audio(), and set_audio_props().

DECKLINK_MAGIC

#define DECKLINK_MAGIC   to_fourcc('v', 'd', 'D', 'L')

Definition at line 72 of file decklink.cpp.

Referenced by display_decklink_getf(), display_decklink_putf(), and display_decklink_reconfigure().

EXIT_IF_FAILED

#define EXIT_IF_FAILED	(		cmd,
			name )

Value:

        do {\
                const HRESULT result = cmd;\
                if (FAILED(result)) {;\
                        LOG(LOG_LEVEL_ERROR) << MOD_NAME << name << ": " << bmd_hresult_to_string(result) << "\n";\
                        return false;\
                }\
        } while (0)

Definition at line 104 of file decklink.cpp.

#define EXIT_IF_FAILED(cmd, name) \
        do {\
                const HRESULT result = cmd;\
                if (FAILED(result)) {;\
                        LOG(LOG_LEVEL_ERROR) << MOD_NAME << name << ": " << bmd_hresult_to_string(result) << "\n";\
                        return false;\
                }\
        } while (0)

Referenced by display_decklink_reconfigure(), and enable_audio().

MOD_NAME

#define MOD_NAME   "[DeckLink display] "

Definition at line 73 of file decklink.cpp.

Referenced by display_decklink_reconfigure(), and get_mode().

RELEASE_IF_NOT_NULL

#define RELEASE_IF_NOT_NULL

(

x

)

Value:

if ((x) != nullptr) { (x)->Release(); (x) = nullptr; }

Definition at line 97 of file decklink.cpp.

STDMETHODCALLTYPE

#define STDMETHODCALLTYPE

Definition at line 94 of file decklink.cpp.

Typedef Documentation

hrc

using hrc = std::chrono::high_resolution_clock

Definition at line 122 of file decklink.cpp.

Function Documentation

allocate_new_decklink_frame()

static DeckLinkFrame * allocate_new_decklink_frame ( struct state_decklink * s )

static

Definition at line 688 of file decklink.cpp.

{
        const int linesize =
            vc_get_linesize(s->vid_desc.width, s->vid_desc.color_spec);
        return s->stereo
                   ? DeckLink3DFrame::Create(
                         s->vid_desc.width, s->vid_desc.height, linesize,
                         s->pixelFormat, s->buffer_pool, s->requested_hdr_mode)
                   : DeckLinkFrame::Create(
                         s->vid_desc.width, s->vid_desc.height, linesize,
                         s->pixelFormat, s->buffer_pool, s->requested_hdr_mode);
}

References state_decklink::buffer_pool, state_decklink::pixelFormat, state_decklink::requested_hdr_mode, state_decklink::stereo, and vc_get_linesize().

Referenced by display_decklink_getf().

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debug_print_metadata_id()

static void debug_print_metadata_id ( const char * fn_name, BMDDeckLinkFrameMetadataID metadataID )

inlinestatic

Definition at line 2011 of file decklink.cpp.

                                                                                                       {
        if (log_level < LOG_LEVEL_DEBUG2) {
                return;
        }
        array<char, sizeof metadataID + 1> fourcc{};
        copy(reinterpret_cast<char *>(&metadataID), reinterpret_cast<char *>(&metadataID) + sizeof metadataID, fourcc.data());
        LOG(LOG_LEVEL_DEBUG2) << MOD_NAME << "DecklLinkFrame " << fn_name << ": " << fourcc.data() << "\n";
}

References LOG, log_level, LOG_LEVEL_DEBUG2, and MOD_NAME.

display_decklink_done()

static void display_decklink_done ( void * state )

static

Definition at line 1573 of file decklink.cpp.

{
        debug_msg("display_decklink_done\n"); /* TOREMOVE */
        struct state_decklink *s = (struct state_decklink *)state;
 
        assert (s != NULL);
 
        if (s->initialized) {
                if (!s->low_latency) {
                        CALL_AND_CHECK(
                                    s->deckLinkOutput->StopScheduledPlayback(0, nullptr, 0),
                                    "StopScheduledPlayback");
                }
                s->deckLinkOutput->SetScheduledFrameCompletionCallback(nullptr);
                if (s->play_audio) {
                        CALL_AND_CHECK(
                                    s->deckLinkOutput->DisableAudioOutput(),
                                    "DisableAudiioOutput");
                }
                CALL_AND_CHECK(s->deckLinkOutput->DisableVideoOutput(),
                               "DisableVideoOutput");
        }
 
        RELEASE_IF_NOT_NULL(s->deckLinkAttributes);
        RELEASE_IF_NOT_NULL(s->deckLinkConfiguration);
        RELEASE_IF_NOT_NULL(s->deckLinkOutput);
        RELEASE_IF_NOT_NULL(s->deckLink);
 
        while (!s->buffer_pool.frame_queue.empty()) {
                auto tmp = s->buffer_pool.frame_queue.front();
                s->buffer_pool.frame_queue.pop();
                tmp->Release();
        }
 
        delete s->timecode;
 
        decklink_uninitialize(&s->com_initialized);
        delete s;
}

References state_decklink::buffer_pool, CALL_AND_CHECK, state_decklink::com_initialized, debug_msg, state_decklink::deckLink, decklink_uninitialize(), state_decklink::deckLinkAttributes, state_decklink::deckLinkConfiguration, state_decklink::deckLinkOutput, state_decklink::initialized, state_decklink::low_latency, state_decklink::play_audio, RELEASE_IF_NOT_NULL, state, and state_decklink::timecode.

Referenced by display_decklink_init().

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display_decklink_get_property()

static bool display_decklink_get_property ( void * state, int property, void * val, size_t * len )

static

Definition at line 1613 of file decklink.cpp.

{
        struct state_decklink *s = (struct state_decklink *)state;
        vector<codec_t> codecs(uv_to_bmd_codec_map.size());
        int rgb_shift[] = {16, 8, 0};
        interlacing_t supported_il_modes[] = {PROGRESSIVE, INTERLACED_MERGED, SEGMENTED_FRAME};
        int count = 0;
        for (auto & c : uv_to_bmd_codec_map) {
                if (decklink_supports_codec(s->deckLinkOutput, c.second)) {
                        codecs[count++] = c.first;
                }
        }
        
        switch (property) {
                case DISPLAY_PROPERTY_CODECS:
                        if(sizeof(codec_t) * count <= *len) {
                                memcpy(val, codecs.data(), sizeof(codec_t) * count);
                                *len = sizeof(codec_t) * count;
                        } else {
                                return false;
                        }
                        break;
                case DISPLAY_PROPERTY_RGB_SHIFT:
                        if(sizeof(rgb_shift) > *len) {
                                return false;
                        }
                        memcpy(val, rgb_shift, sizeof(rgb_shift));
                        *len = sizeof(rgb_shift);
                        break;
                case DISPLAY_PROPERTY_BUF_PITCH:
                        *(int *) val = PITCH_DEFAULT;
                        *len = sizeof(int);
                        break;
                case DISPLAY_PROPERTY_VIDEO_MODE:
                        *(int *) val = DISPLAY_PROPERTY_VIDEO_SEPARATE_3D;
                        *len = sizeof(int);
                        break;
                case DISPLAY_PROPERTY_SUPPORTED_IL_MODES:
                        if(sizeof(supported_il_modes) <= *len) {
                                memcpy(val, supported_il_modes, sizeof(supported_il_modes));
                        } else {
                                return false;
                        }
                        *len = sizeof(supported_il_modes);
                        break;
                case DISPLAY_PROPERTY_AUDIO_FORMAT:
                        {
                                assert(*len == sizeof(struct audio_desc));
                                struct audio_desc *desc = (struct audio_desc *) val;
                                desc->sample_rate = 48000;
                                if (desc->ch_count >= s->max_aud_chans) {
                                        desc->ch_count = (int) s->max_aud_chans;
                                } else if (desc->ch_count <= 2) {
                                        desc->ch_count = 2;
                                } else if (desc->ch_count <= 8) {
                                        desc->ch_count = 8;
                                } else {
                                        desc->ch_count =
                                            next_power_of_two(desc->ch_count);
                                }
                                desc->codec = AC_PCM;
                                desc->bps = desc->bps < 3 ? 2 : 4;
                        }
                        break;
                default:
                        return false;
        }
        return true;
}

References AC_PCM, codecs, count, decklink_supports_codec(), state_decklink::deckLinkOutput, desc, DISPLAY_PROPERTY_AUDIO_FORMAT, DISPLAY_PROPERTY_BUF_PITCH, DISPLAY_PROPERTY_CODECS, DISPLAY_PROPERTY_RGB_SHIFT, DISPLAY_PROPERTY_SUPPORTED_IL_MODES, DISPLAY_PROPERTY_VIDEO_MODE, DISPLAY_PROPERTY_VIDEO_SEPARATE_3D, INTERLACED_MERGED, len, state_decklink::max_aud_chans, next_power_of_two(), PITCH_DEFAULT, PROGRESSIVE, property, SEGMENTED_FRAME, state, uv_to_bmd_codec_map, and val.

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display_decklink_getf()

static struct video_frame * display_decklink_getf ( void * state )

static

Definition at line 702 of file decklink.cpp.

{
        struct state_decklink *s = (struct state_decklink *)state;
        assert(s->magic == DECKLINK_MAGIC);
        assert(s->initialized);
 
        if (s->audio_reconfigure) {
                if (!display_decklink_reconfigure(s, s->vid_desc)) {
                        MSG(FATAL, "Cannot reinit after audio reconf!\n");
                        abort();
                }
                s->audio_reconfigure = false;
        }
 
        struct video_frame *out = vf_alloc_desc(s->vid_desc);
        static auto dispose = [](struct video_frame *frame) {
                vf_free(frame);
        };
        out->callbacks.dispose = dispose;
 
        const int linesize = vc_get_linesize(s->vid_desc.width, s->vid_desc.color_spec);
        DeckLinkFrame *deckLinkFrame = nullptr;
        lock_guard<mutex> lg(s->buffer_pool.lock);
 
        while (!s->buffer_pool.frame_queue.empty()) {
                auto tmp = s->buffer_pool.frame_queue.front();
                DeckLinkFrame *frame =
                    s->stereo ? dynamic_cast<DeckLink3DFrame *>(tmp)
                              : dynamic_cast<DeckLinkFrame *>(tmp);
                s->buffer_pool.frame_queue.pop();
                if (!frame || // wrong type
                    frame->GetWidth() != (long)s->vid_desc.width ||
                    frame->GetHeight() != (long)s->vid_desc.height ||
                    frame->GetRowBytes() != linesize || frame->GetPixelFormat() != s->pixelFormat) {
                        tmp->Release();
                } else {
                        deckLinkFrame = frame;
                        deckLinkFrame->AddRef();
                        break;
                }
        }
        if (!deckLinkFrame) {
                deckLinkFrame = allocate_new_decklink_frame(s);
        }
        out->callbacks.dispose_udata = (void *) deckLinkFrame;
 
        deckLinkFrame->GetBytes((void **)&out->tiles[0].data);
 
        if (s->stereo) {
                IDeckLinkVideoFrame *deckLinkFrameRight = nullptr;
                DeckLink3DFrame *frame3D = dynamic_cast<DeckLink3DFrame *>(deckLinkFrame);
                assert(frame3D != nullptr);
                frame3D->GetFrameForRightEye(&deckLinkFrameRight);
                deckLinkFrameRight->GetBytes((void **)&out->tiles[1].data);
                // release immedieatelly (parent still holds the reference)
                deckLinkFrameRight->Release();
        }
 
        return out;
}

References allocate_new_decklink_frame(), state_decklink::audio_reconfigure, state_decklink::buffer_pool, video_frame::callbacks, tile::data, DECKLINK_MAGIC, display_decklink_reconfigure(), video_frame_callbacks::dispose, video_frame_callbacks::dispose_udata, frame, state_decklink::initialized, state_decklink::magic, MSG, state_decklink::pixelFormat, state, state_decklink::stereo, video_frame::tiles, vc_get_linesize(), vf_alloc_desc(), and vf_free().

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display_decklink_init()

static void * display_decklink_init ( struct module * parent, const char * fmt, unsigned int flags )

static

Definition at line 1392 of file decklink.cpp.

{
        HRESULT                                         result;
        string                                          cardId("0");
        IDeckLinkConfiguration*         deckLinkConfiguration = NULL;
        // for Decklink Studio which has switchable XLR - analog 3 and 4 or AES/EBU 3,4 and 5,6
 
        if (strcmp(fmt, "help") == 0 || strcmp(fmt, "fullhelp") == 0) {
                show_help(strcmp(fmt, "fullhelp") == 0);
                return INIT_NOERR;
        }
        if (IS_KEY_PREFIX(fmt, "query")) {
                show_help(true, strchr(fmt, '=') + 1);
                return INIT_NOERR;
        }
 
        if (!blackmagic_api_version_check()) {
                return NULL;
        }
 
        auto *s = new state_decklink();
        s->audio_drift_fixer.set_root(get_root_module(parent));
 
        bool succeeded = false;
        try {
                succeeded = settings_init(s, fmt, cardId);
        } catch (exception &e) {
                if (invalid_arg_is_numeric(e.what())) {
                        MSG(ERROR, "Invalid number passed where numeric "
                                   "argument expected!\n");
                } else {
                        MSG(ERROR, "%s\n", e.what());
                }
        }
        if (!succeeded) {
                delete s;
                return NULL;
        }
 
        // Connect to the first DeckLink instance
        for (auto &d : bmd_get_sorted_devices(&s->com_initialized, true)) {
                s->deckLink = get<0>(d).release(); // unmanage
                string deviceName = bmd_get_device_name(s->deckLink);
 
                if (!deviceName.empty() && deviceName == cardId) {
                        break;
                }
                // topological ID
                const unsigned long tid = strtoul(cardId.c_str(), nullptr, 16);
                if (get<unsigned>(d) == tid) {
                        break;
                }
                // natural (old) index
                if (isdigit(cardId.c_str()[0])) {
                        if (atoi(cardId.c_str()) == get<int>(d)) {
                                break;
                        }
                }
                // new (character) index
                if (cardId.length() == 1 && cardId[0] >= 'a') {
                        if (cardId[0] == get<char>(d)) {
                                break;
                        }
                }
 
                s->deckLink->Release();
                s->deckLink = nullptr;
        }
        if (s->deckLink == nullptr) {
                LOG(LOG_LEVEL_ERROR) << "No DeckLink PCI card " << cardId << " found\n";
                display_decklink_done(s);
                return nullptr;
        }
        // Print the model name of the DeckLink card
        string deviceName = bmd_get_device_name(s->deckLink);
        if (!deviceName.empty()) {
                LOG(LOG_LEVEL_INFO) << MOD_NAME "Using device " << deviceName << "\n";
        }
 
        // Get IDeckLinkAttributes object
        result = s->deckLink->QueryInterface(
            IID_IDeckLinkProfileAttributes,
            reinterpret_cast<void **>(&s->deckLinkAttributes));
        if (result != S_OK) {
                LOG(LOG_LEVEL_WARNING)
                    << MOD_NAME "Could not query device attributes: "
                    << bmd_hresult_to_string(result) << "\n";
                display_decklink_done(s);
                return nullptr;
        }
 
        if(s->emit_timecode) {
                s->timecode = new DeckLinkTimecode;
        } else {
                s->timecode = NULL;
        }
 
        if (!s->keep_device_defaults && !s->profile_req.keep()) {
                if (!decklink_set_profile(s->deckLink, s->profile_req,
                                          s->stereo)) {
                        display_decklink_done(s);
                        return nullptr;
                }
        }
 
        // Obtain the audio/video output interface (IDeckLinkOutput)
        if ((result = s->deckLink->QueryInterface(
                 IID_IDeckLinkOutput, reinterpret_cast<void **>(&s->deckLinkOutput))) != S_OK) {
                log_msg(LOG_LEVEL_ERROR,
                        MOD_NAME "Could not obtain the IDeckLinkOutput interface: %08x\n",
                        (int)result);
                display_decklink_done(s);
                return nullptr;
        }
 
        // Query the DeckLink for its configuration interface
        result = s->deckLink->QueryInterface(IID_IDeckLinkConfiguration,
                                             reinterpret_cast<void **>(&deckLinkConfiguration));
        s->deckLinkConfiguration = deckLinkConfiguration;
        if (result != S_OK) {
                log_msg(LOG_LEVEL_ERROR,
                        "Could not obtain the IDeckLinkConfiguration interface: %08x\n",
                        (int)result);
                display_decklink_done(s);
                return nullptr;
         }
 
        for (const auto &o : s->device_options) {
                if (s->keep_device_defaults && !o.second.is_user_set()) {
                        continue;
                }
                if (!o.second.device_write(deckLinkConfiguration, o.first, MOD_NAME)) {
                        display_decklink_done(s);
                        return nullptr;
                }
        }
 
        if (s->requested_hdr_mode.EOTF != static_cast<int64_t>(HDR_EOTF::NONE)) {
                BMD_BOOL hdr_supp = BMD_FALSE;
                if (s->deckLinkAttributes->GetFlag(BMDDeckLinkSupportsHDRMetadata, &hdr_supp) !=
                        S_OK) {
                                LOG(LOG_LEVEL_WARNING)
                                    << MOD_NAME
                                    << "HDR requested, but unable to validate HDR support. Will "
                                       "try to pass it anyway which may result in blank image if "
                                       "not supported - remove the option if so.\n";
                } else {
                        if (hdr_supp != BMD_TRUE) {
                                LOG(LOG_LEVEL_ERROR)
                                    << MOD_NAME
                                    << "HDR requested, but card doesn't support that.\n";
                                display_decklink_done(s);
                                return nullptr;
                        }
                }
 
                BMD_BOOL rec2020_supp = BMD_FALSE;
                if (s->deckLinkAttributes->GetFlag(BMDDeckLinkSupportsColorspaceMetadata,
                                                   &rec2020_supp) != S_OK) {
                        LOG(LOG_LEVEL_WARNING)
                            << MOD_NAME << "Cannot check Rec. 2020 color space metadata support.\n";
                } else {
                        if (rec2020_supp != BMD_TRUE) {
                                LOG(LOG_LEVEL_WARNING)
                                    << MOD_NAME
                                    << "Rec. 2020 color space metadata not supported.\n";
                                }
                }
        }
 
        set_audio_props(s, deckLinkConfiguration,
                        flags & DISPLAY_FLAG_AUDIO_ANY);
 
        if (!s->low_latency) {
                s->delegate.SetDecklinkOutput(s->deckLinkOutput);
        }
        // s->state.at(i).deckLinkOutput->DisableAudioOutput();
 
        return (void *)s;
}

References state_decklink::audio_drift_fixer, blackmagic_api_version_check(), BMD_BOOL, BMD_FALSE, bmd_get_device_name(), bmd_get_sorted_devices(), bmd_hresult_to_string(), BMD_TRUE, state_decklink::com_initialized, state_decklink::deckLink, decklink_set_profile(), state_decklink::deckLinkAttributes, state_decklink::deckLinkConfiguration, state_decklink::deckLinkOutput, state_decklink::delegate, state_decklink::device_options, display_decklink_done(), DISPLAY_FLAG_AUDIO_ANY, state_decklink::emit_timecode, flags, fmt, get_root_module(), INIT_NOERR, invalid_arg_is_numeric(), IS_KEY_PREFIX, bmd_option::keep(), state_decklink::keep_device_defaults, LOG, LOG_LEVEL_ERROR, LOG_LEVEL_INFO, LOG_LEVEL_WARNING, log_msg(), state_decklink::low_latency, MOD_NAME, MSG, parent, state_decklink::profile_req, state_decklink::requested_hdr_mode, set_audio_props(), AudioDriftFixer::set_root(), settings_init(), show_help(), state_decklink::stereo, and state_decklink::timecode.

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display_decklink_probe()

static void display_decklink_probe ( struct device_info ** available_cards, int * count, void(** deleter )(void *) )

static

Definition at line 1132 of file decklink.cpp.

{
        UNUSED(deleter);
 
        *count = 0;
        *available_cards = nullptr;
 
        bool com_initialized = false;
        // Enumerate all cards in this system
        for (auto &d : bmd_get_sorted_devices(&com_initialized, false)) {
                IDeckLink *deckLink = get<0>(d).get();
                string deviceName = bmd_get_device_name(deckLink);
                if (deviceName.empty()) {
                        deviceName = "(unknown)";
                }
 
                *count += 1;
                *available_cards = (struct device_info *)
                        realloc(*available_cards, *count * sizeof(struct device_info));
                memset(*available_cards + *count - 1, 0, sizeof(struct device_info));
                snprintf((*available_cards)[*count - 1].dev,
                         sizeof(*available_cards)[*count - 1].dev, ":device=%6x",
                         get<unsigned>(d));
                snprintf((*available_cards)[*count - 1].extra, sizeof (*available_cards)[*count - 1].extra, "\"embeddedAudioAvailable\":\"t\"");
                (*available_cards)[*count - 1].repeatable = false;
 
                strncpy((*available_cards)[*count - 1].name, deviceName.c_str(),
                                sizeof (*available_cards)[*count - 1].name - 1);
 
                dev_add_option(&(*available_cards)[*count - 1], "3D", "3D", "3D", ":3D", true);
                dev_add_option(&(*available_cards)[*count - 1], "Profile", "Duplex profile can be one of: 1dhd, 2dhd, 2dfd, 4dhd, keep", "profile", ":profile=", false);
                dev_add_option(&(*available_cards)[*count - 1], "HDR", "Can be one of: SDR, HDR, PQ, HLG or int 0-7", "hdr", ":HDR=", false);
        }
 
        decklink_uninitialize(&com_initialized);
}

References bmd_get_device_name(), bmd_get_sorted_devices(), count, decklink_uninitialize(), deleter, dev_add_option(), name, and UNUSED.

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display_decklink_put_audio_frame()

static void display_decklink_put_audio_frame ( void * state, const struct audio_frame * frame )

static

Definition at line 1728 of file decklink.cpp.

{
        struct state_decklink *s = (struct state_decklink *)state;
        assert(s->play_audio);
        if (s->audio_reconfigure) {
                return;
        }
        const unsigned int sampleFrameCount =
            frame->data_len / (frame->bps * frame->ch_count);
        uint32_t sampleFramesWritten = sampleFrameCount;
 
        uint32_t buffered = 0;
        s->deckLinkOutput->GetBufferedAudioSampleFrameCount(&buffered);
        if (buffered == 0) {
                LOG(LOG_LEVEL_WARNING) << MOD_NAME << "audio buffer underflow!\n";
        }
 
        if (s->low_latency) {
                HRESULT res = s->deckLinkOutput->WriteAudioSamplesSync(frame->data, sampleFrameCount,
                                &sampleFramesWritten);
                if (FAILED(res)) {
                        log_msg(LOG_LEVEL_WARNING, MOD_NAME "WriteAudioSamplesSync failed.\n");
                        return;
                }
        } else {
                s->delegate.ScheduleAudio(frame, &sampleFramesWritten,
                                          buffered == 0);
        }
        const bool overflow = sampleFramesWritten != sampleFrameCount;
        if (overflow || log_level >= LOG_LEVEL_DEBUG) {
                ostringstream details_oss;
                if (log_level >= LOG_LEVEL_VERBOSE) {
                        details_oss
                            << " (" << sampleFramesWritten << " written, "
                            << sampleFrameCount - sampleFramesWritten
                            << " dropped, " << buffered << " buffer size)";
                }
                int level = overflow ? LOG_LEVEL_WARNING : LOG_LEVEL_DEBUG;
                LOG(level) << MOD_NAME << "audio buffer"
                           << (overflow ? " overflow!" : "")
                           << details_oss.str() << "\n";
        }
        s->audio_drift_fixer.update(buffered, sampleFrameCount, sampleFramesWritten);
}

References state_decklink::audio_drift_fixer, state_decklink::audio_reconfigure, state_decklink::deckLinkOutput, state_decklink::delegate, FAILED, frame, LOG, log_level, LOG_LEVEL_DEBUG, LOG_LEVEL_VERBOSE, LOG_LEVEL_WARNING, log_msg(), state_decklink::low_latency, MOD_NAME, state_decklink::play_audio, state, and AudioDriftFixer::update().

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display_decklink_putf()

static bool display_decklink_putf ( void * state, struct video_frame * frame, long long timeout_ns )

static

Definition at line 803 of file decklink.cpp.

{
        struct state_decklink *s = (struct state_decklink *)state;
        bool ret = true;
 
        if (frame == NULL)
                return true;
 
        assert(s->magic == DECKLINK_MAGIC);
 
        if (frame->color_spec == R10k && get_commandline_param(R10K_FULL_OPT) == nullptr) {
                for (unsigned i = 0; i < frame->tile_count; ++i) {
                        r10k_full_to_limited(frame->tiles[i].data, frame->tiles[i].data, frame->tiles[i].data_len);
                }
        }
 
        auto *deckLinkFrame = (DeckLinkFrame *) frame->callbacks.dispose_udata;
        if (s->emit_timecode) {
                deckLinkFrame->SetTimecode(bmdTimecodeRP188Any, s->timecode);
        }
 
        if (s->low_latency) {
                s->deckLinkOutput->DisplayVideoFrameSync(deckLinkFrame);
                deckLinkFrame->Release();
        } else {
                deckLinkFrame->timestamp = frame->timestamp;
                ret = s->delegate.EnqueueFrame(deckLinkFrame);
        }
        if(s->emit_timecode) {
                update_timecode(s->timecode, s->vid_desc.fps);
        }
 
        frame->callbacks.dispose(frame);
 
        s->delegate.PrintStats();
 
        return ret;
}

References video_frame::callbacks, video_frame::color_spec, tile::data, tile::data_len, DECKLINK_MAGIC, state_decklink::deckLinkFrame, state_decklink::deckLinkOutput, state_decklink::delegate, video_frame_callbacks::dispose, video_frame_callbacks::dispose_udata, state_decklink::emit_timecode, frame, get_commandline_param(), state_decklink::low_latency, state_decklink::magic, R10k, R10K_FULL_OPT, r10k_full_to_limited(), state, video_frame::tile_count, video_frame::tiles, state_decklink::timecode, video_frame::timestamp, and update_timecode().

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display_decklink_reconfigure()

static bool display_decklink_reconfigure ( void * state, struct video_desc desc )

static

Definition at line 923 of file decklink.cpp.

{
        auto *s = (struct state_decklink *) state;
        assert(s->magic == DECKLINK_MAGIC);
 
        BMDDisplayMode                    displayMode;
        BMD_BOOL                          supported;
        HRESULT                           result;
 
        const unique_lock<mutex> lk(s->audio_reconf_lock);
        s->delegate.ResetAudio(); // disables audio until full reconf
 
        s->vid_desc = desc;
 
        if (s->initialized) {
                if (!s->low_latency) {
                        CALL_AND_CHECK(s->deckLinkOutput->StopScheduledPlayback(
                                           0, nullptr, 0),
                                       "StopScheduledPlayback");
                }
                s->deckLinkOutput->SetScheduledFrameCompletionCallback(nullptr);
                CALL_AND_CHECK(s->deckLinkOutput->DisableVideoOutput(),
                               "DisableVideoOutput");
                if (s->play_audio) {
                        CALL_AND_CHECK(s->deckLinkOutput->DisableAudioOutput(),
                                       "DisableAudioOutput");
                }
                s->initialized = false;
        }
 
        s->delegate.Reset();
 
        if (desc.color_spec == R10k && get_commandline_param(R10K_FULL_OPT) == nullptr) {
                log_msg(LOG_LEVEL_WARNING, MOD_NAME "Using limited range R10k as specified by BMD, use '--param "
                                R10K_FULL_OPT "' to override.\n");
        }
 
        auto it = std::find_if(uv_to_bmd_codec_map.begin(),
                        uv_to_bmd_codec_map.end(),
                        [&desc](const std::pair<codec_t, BMDPixelFormat>& el){ return el.first == desc.color_spec; });
        if (it == uv_to_bmd_codec_map.end()) {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Unsupported pixel format!\n");
                return false;
        }
        s->pixelFormat = it->second;
 
        if (desc.tile_count <= 2 && desc.tile_count != (s->stereo ? 2 : 1)) {
                log_msg(LOG_LEVEL_WARNING, MOD_NAME "Stereo %s enabled but receiving %u streams. %sabling "
                                "it. This behavior is experimental so please report any problems. "
                                "You can also specify (or not) `3D` option explicitly.\n"
                                , s->stereo ? "" : "not", desc.tile_count, s->stereo ? "dis" : "en");
                s->stereo = !s->stereo;
        }
 
        if (s->stereo) {
                bmd_check_stereo_profile(s->deckLink);
                if ((int) desc.tile_count != 2) {
                        log_msg(LOG_LEVEL_ERROR, MOD_NAME "In stereo mode exactly "
                                        "2 streams expected, %d received.\n", desc.tile_count);
                        return false;
                }
        } else {
                if ((int) desc.tile_count == 2) {
                        log_msg(LOG_LEVEL_WARNING, MOD_NAME "Received 2 streams but stereo mode is not enabled! Did you forget a \"3D\" parameter?\n");
                }
        }
 
        BMDVideoOutputFlags outputFlags = bmdVideoOutputFlagDefault;
        BMDSupportedVideoModeFlags supportedFlags = bmdSupportedVideoModeDefault;
 
        BMDTimeValue frameRateDuration{};
        BMDTimeScale frameRateScale{};
        displayMode = get_mode(s->deckLinkOutput, desc, &frameRateDuration,
                               &frameRateScale, s->stereo);
        if (displayMode == bmdModeUnknown) {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Could not find suitable video mode.\n");
                return false;
        }
        s->delegate.SetFrameTimes(frameRateDuration, frameRateScale);
 
        if (s->emit_timecode) {
                outputFlags = (BMDVideoOutputFlags)(outputFlags | bmdVideoOutputRP188);
        }
 
        if (s->stereo) {
                outputFlags = (BMDVideoOutputFlags)(outputFlags | bmdVideoOutputDualStream3D);
                supportedFlags = (BMDSupportedVideoModeFlags)(supportedFlags |
                                                              bmdSupportedVideoModeDualStream3D);
        }
 
        const bmd_option subsampling_444(codec_is_a_rgb(desc.color_spec),
                                         false); // we don't have pixfmt for 444 YCbCr
        subsampling_444.device_write(s->deckLinkConfiguration, bmdDeckLinkConfig444SDIVideoOutput,
                                     MOD_NAME);
 
        if (!s->keep_device_defaults &&
            s->device_options.find(bmdDeckLinkConfigSDIOutputLinkConfiguration) ==
                s->device_options.end()) {
                const int64_t link = desc.width == 7680 ? bmdLinkConfigurationQuadLink
                                                        : bmdLinkConfigurationSingleLink;
                bmd_option(link).device_write(s->deckLinkConfiguration,
                                              bmdDeckLinkConfigSDIOutputLinkConfiguration,
                                              MOD_NAME);
        }
 
        int64_t link = 0;
        s->deckLinkConfiguration->GetInt(bmdDeckLinkConfigSDIOutputLinkConfiguration, &link);
        if (!s->keep_device_defaults && s->profile_req.is_default() &&
            link == bmdLinkConfigurationQuadLink) {
                LOG(LOG_LEVEL_WARNING)
                    << MOD_NAME "Quad-link detected - setting 1-subdevice-1/2-duplex "
                                "profile automatically, use 'profile=keep' to override.\n";
                decklink_set_profile(
                    s->deckLink, bmd_option((int64_t)bmdProfileOneSubDeviceHalfDuplex), s->stereo);
        } else if (link == bmdLinkConfigurationQuadLink &&
                   (!s->profile_req.keep() &&
                    s->profile_req.get_int() != bmdProfileOneSubDeviceHalfDuplex)) {
                LOG(LOG_LEVEL_WARNING) << MOD_NAME "Setting quad-link and an incompatible device "
                                                   "profile may not be supported!\n";
        }
 
        BMD_BOOL quad_link_supp = BMD_FALSE;
        if (s->deckLinkAttributes->GetFlag(BMDDeckLinkSupportsQuadLinkSDI, &quad_link_supp) ==
                S_OK &&
            quad_link_supp == BMD_TRUE) {
                s->quad_square_division_split.device_write(
                    s->deckLinkConfiguration,
                    bmdDeckLinkConfigQuadLinkSDIVideoOutputSquareDivisionSplit, MOD_NAME);
        }
 
        const BMDVideoOutputConversionMode conversion_mode =
            s->device_options.find(bmdDeckLinkConfigVideoOutputConversionMode) !=
                    s->device_options.end()
                ? (BMDVideoOutputConversionMode)s->device_options
                      .at(bmdDeckLinkConfigVideoOutputConversionMode)
                      .get_int()
                : (BMDVideoOutputConversionMode)bmdNoVideoOutputConversion;
        EXIT_IF_FAILED(s->deckLinkOutput->DoesSupportVideoMode(
                           bmdVideoConnectionUnspecified, displayMode, s->pixelFormat,
                           conversion_mode, supportedFlags, nullptr, &supported),
                       "DoesSupportVideoMode");
        if (!supported) {
                log_msg(LOG_LEVEL_ERROR,
                        MOD_NAME "Requested parameters "
                                 "combination not supported - %d * %dx%d@%f, timecode %s.\n",
                        desc.tile_count, desc.width, desc.height, desc.fps,
                        (outputFlags & bmdVideoOutputRP188 ? "ON" : "OFF"));
                return false;
        }
 
        result = s->deckLinkOutput->EnableVideoOutput(displayMode, outputFlags);
        if (FAILED(result)) {
                if (result == E_ACCESSDENIED) {
                        log_msg(LOG_LEVEL_ERROR,
                                MOD_NAME "Unable to access the hardware or output "
                                         "stream currently active (another application "
                                         "using it?).\n");
                } else {
                        LOG(LOG_LEVEL_ERROR)
                            << MOD_NAME << "EnableVideoOutput: " << bmd_hresult_to_string(result)
                            << "\n";
                }
                return false;
        }
 
        if (s->play_audio) {
                if (!enable_audio(s, s->aud_desc.bps, s->aud_desc.ch_count)) {
                        return false;
                }
        }
 
        if (!s->low_latency) {
                // Provide this class as a delegate to a video output interface
                s->deckLinkOutput->SetScheduledFrameCompletionCallback(
                    &s->delegate);
                if (!s->delegate.Preroll(s)) {
                        return false;
                }
        }
 
        s->initialized = true;
        s->audio_reconfigure = false;
        return true;
}

References BMD_BOOL, bmd_check_stereo_profile(), BMD_FALSE, bmd_hresult_to_string(), BMD_TRUE, CALL_AND_CHECK, codec_is_a_rgb(), video_desc::color_spec, DECKLINK_MAGIC, decklink_set_profile(), desc, bmd_option::device_write(), enable_audio(), EXIT_IF_FAILED, FAILED, video_desc::fps, state_decklink::frameRateDuration, state_decklink::frameRateScale, get_commandline_param(), get_mode(), video_desc::height, LOG, LOG_LEVEL_ERROR, LOG_LEVEL_WARNING, log_msg(), MOD_NAME, R10k, R10K_FULL_OPT, state, video_desc::tile_count, uv_to_bmd_codec_map, and video_desc::width.

Referenced by display_decklink_getf().

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display_decklink_reconfigure_audio()

static bool display_decklink_reconfigure_audio ( void * state, int quant_samples, int channels, int sample_rate )

static

Definition at line 1773 of file decklink.cpp.

                                 {
        struct state_decklink *s = (struct state_decklink *)state;
 
        assert(s->play_audio);
        CHECK_CH_COUNT(channels);
        assert(quant_samples == 16 || quant_samples == 32);
        
        const int bps = quant_samples / 8;
        const unique_lock<mutex> lk(s->audio_reconf_lock);
        if (bps != s->aud_desc.bps || sample_rate != s->aud_desc.sample_rate ||
            channels != s->aud_desc.ch_count) {
                s->aud_desc = {quant_samples / 8, sample_rate, channels,
                               AC_PCM};
                s->audio_reconfigure = true;
                LOG(LOG_LEVEL_VERBOSE)
                    << MOD_NAME << "Audio reconfigured to: " << s->aud_desc
                    << "\n";
        }
 
        return true;
}

References AC_PCM, state_decklink::audio_reconf_lock, state_decklink::audio_reconfigure, channels, CHECK_CH_COUNT, LOG, LOG_LEVEL_VERBOSE, MOD_NAME, state_decklink::play_audio, quant_samples, sample_rate, and state.

enable_audio()

static bool enable_audio ( struct state_decklink * s, int bps, int channels )

static

Definition at line 907 of file decklink.cpp.

{
        const BMDAudioSampleType sample_type =
            bps == 2 ? bmdAudioSampleType16bitInteger
                     : bmdAudioSampleType32bitInteger;
        const BMDAudioOutputStreamType stream_type =
            s->low_latency ? bmdAudioOutputStreamContinuous
                           : bmdAudioOutputStreamTimestamped;
        EXIT_IF_FAILED(
            s->deckLinkOutput->EnableAudioOutput(
                bmdAudioSampleRate48kHz, sample_type, channels, stream_type),
            "EnableAudioOutput");
        return true;
}

References channels, state_decklink::deckLinkOutput, EXIT_IF_FAILED, and state_decklink::low_latency.

Referenced by display_decklink_reconfigure().

get_mode()

static BMDDisplayMode get_mode ( IDeckLinkOutput * deckLinkOutput, struct video_desc desc, BMDTimeValue * frameRateDuration, BMDTimeScale * frameRateScale, bool stereo )

static

Definition at line 843 of file decklink.cpp.

{       IDeckLinkDisplayModeIterator     *displayModeIterator;
        IDeckLinkDisplayMode*             deckLinkDisplayMode;
        BMDDisplayMode                    displayMode = bmdModeUnknown;
        
        // Populate the display mode combo with a list of display modes supported by the installed DeckLink card
        if (FAILED(deckLinkOutput->GetDisplayModeIterator(&displayModeIterator)))
        {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Fatal: cannot create display mode iterator.\n");
                return bmdModeUnknown;
        }
 
        while (displayModeIterator->Next(&deckLinkDisplayMode) == S_OK)
        {
                BMD_STR modeNameString;
                if (deckLinkDisplayMode->GetName(&modeNameString) == S_OK)
                {
                        if (deckLinkDisplayMode->GetWidth() == (long) desc.width &&
                                        deckLinkDisplayMode->GetHeight() == (long) desc.height)
                        {
                                double displayFPS;
                                BMDFieldDominance dominance;
                                bool interlaced;
 
                                dominance = deckLinkDisplayMode->GetFieldDominance();
                                if (dominance == bmdLowerFieldFirst ||
                                                dominance == bmdUpperFieldFirst) {
                                        if (dominance == bmdLowerFieldFirst) {
                                                bug_msg(
                                                    LOG_LEVEL_WARNING, MOD_NAME
                                                    "Lower field first format "
                                                    "detected, fields can be "
                                                    "switched! ");
                                        }
                                        interlaced = true;
                                } else { // progressive, psf, unknown
                                        interlaced = false;
                                }
 
                                deckLinkDisplayMode->GetFrameRate(frameRateDuration,
                                                frameRateScale);
                                displayFPS = (double) *frameRateScale / *frameRateDuration;
                                if (fabs(desc.fps - displayFPS) < 0.01 && (desc.interlacing == INTERLACED_MERGED) == interlaced) {
                                        MSG(INFO, "Selected mode: %s%s\n",
                                            get_str_from_bmd_api_str(
                                                modeNameString)
                                                .c_str(),
                                            stereo ? " (3D)" : "");
                                        displayMode = deckLinkDisplayMode->GetDisplayMode();
                                        release_bmd_api_str(modeNameString);
                                        deckLinkDisplayMode->Release();
                                        break;
                                }
                        }
                        release_bmd_api_str(modeNameString);
                }
                deckLinkDisplayMode->Release();
        }
        displayModeIterator->Release();
        
        return displayMode;
}

References BMD_STR, bug_msg(), state_decklink::deckLinkOutput, desc, FAILED, video_desc::fps, state_decklink::frameRateDuration, state_decklink::frameRateScale, get_str_from_bmd_api_str(), video_desc::height, INTERLACED_MERGED, video_desc::interlacing, LOG_LEVEL_ERROR, LOG_LEVEL_WARNING, log_msg(), MOD_NAME, MSG, release_bmd_api_str(), state_decklink::stereo, and video_desc::width.

Referenced by display_decklink_reconfigure().

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operator==()

static bool operator== ( const REFIID & first, const REFIID & second )

static

Definition at line 1797 of file decklink.cpp.

                                                                   {
    return (first.byte0 == second.byte0) &&
        (first.byte1 == second.byte1) &&
        (first.byte2 == second.byte2) &&
        (first.byte3 == second.byte3) &&
        (first.byte4 == second.byte4) &&
        (first.byte5 == second.byte5) &&
        (first.byte6 == second.byte6) &&
        (first.byte7 == second.byte7) &&
        (first.byte8 == second.byte8) &&
        (first.byte9 == second.byte9) &&
        (first.byte10 == second.byte10) &&
        (first.byte11 == second.byte11) &&
        (first.byte12 == second.byte12) &&
        (first.byte13 == second.byte13) &&
        (first.byte14 == second.byte14) &&
        (first.byte15 == second.byte15);
}

References first, and second.

print_output_modes()

static void print_output_modes ( IDeckLink * deckLink, const char * query_prop_fcc )

static

Definition at line 2161 of file decklink.cpp.

{
        IDeckLinkOutput*                        deckLinkOutput = NULL;
        IDeckLinkDisplayModeIterator*           displayModeIterator = NULL;
        IDeckLinkDisplayMode*                   displayMode = NULL;
        HRESULT                                 result;
        int                                     displayModeNumber = 0;
 
        // Query the DeckLink for its configuration interface
        result = deckLink->QueryInterface(IID_IDeckLinkOutput, (void**)&deckLinkOutput);
        if (result != S_OK)
        {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Could not obtain the IDeckLinkOutput interface - result = %08x\n", (int) result);
                if (result == E_NOINTERFACE) {
                        log_msg(LOG_LEVEL_ERROR, MOD_NAME "Device doesn't support video playback.\n");
                }
                goto bail;
        }
 
        // Obtain an IDeckLinkDisplayModeIterator to enumerate the display modes supported on output
        result = deckLinkOutput->GetDisplayModeIterator(&displayModeIterator);
        if (result != S_OK)
        {
                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Could not obtain the video output display mode iterator - result = %08x\n", (int) result);
                goto bail;
        }
 
        // List all supported output display modes
        printf("\tdisplay modes:\n");
        while (displayModeIterator->Next(&displayMode) == S_OK)
        {
                BMD_STR                  displayModeString = NULL;
 
                result = displayMode->GetName(&displayModeString);
 
                if (result == S_OK)
                {
                        BMDTimeValue    frameRateDuration;
                        BMDTimeScale    frameRateScale;
 
                        // Obtain the display mode's properties
                        string flags_str = bmd_get_flags_str(displayMode->GetFlags());
                        int modeWidth = displayMode->GetWidth();
                        int modeHeight = displayMode->GetHeight();
                        uint32_t field_dominance_n = ntohl(displayMode->GetFieldDominance());
                        displayMode->GetFrameRate(&frameRateDuration, &frameRateScale);
                        printf(
                            "\t\t%2d) %-20s  %d x %d \t %2.2f FPS %.4s, "
                            "flags: %s\n",
                            displayModeNumber,
                            get_str_from_bmd_api_str(displayModeString).c_str(),
                            modeWidth, modeHeight,
                            (float) ((double) frameRateScale /
                                     (double) frameRateDuration),
                            (char *) &field_dominance_n, flags_str.c_str());
                        release_bmd_api_str(displayModeString);
                }
 
                // Release the IDeckLinkDisplayMode object to prevent a leak
                displayMode->Release();
 
                displayModeNumber++;
        }
        color_printf("\n\tsupported pixel formats:" TERM_BOLD);
        for (auto & c : uv_to_bmd_codec_map) {
                if (decklink_supports_codec(deckLinkOutput, c.second)) {
                        printf(" %s", get_codec_name(c.first));
                }
        }
        color_printf(TERM_RESET "\n");
 
        if (query_prop_fcc != nullptr) {
                IDeckLinkProfileAttributes *deckLinkAttributes = nullptr;
                if (deckLink->QueryInterface(IID_IDeckLinkProfileAttributes,
                                             (void **) &deckLinkAttributes) ==
                    S_OK) {
                        cout << "\n";
                        print_bmd_attribute(deckLinkAttributes, query_prop_fcc);
                        deckLinkAttributes->Release();
                } else {
                        MSG(ERROR, "Could not query device attributes.\n\n");
                }
        }
 
        color_printf("\n");
 
bail:
        // Ensure that the interfaces we obtained are released to prevent a memory leak
        if (displayModeIterator != NULL)
                displayModeIterator->Release();
 
        if (deckLinkOutput != NULL)
                deckLinkOutput->Release();
}

References bmd_get_flags_str(), BMD_STR, color_printf(), decklink_supports_codec(), get_codec_name(), get_str_from_bmd_api_str(), LOG_LEVEL_ERROR, log_msg(), MOD_NAME, MSG, print_bmd_attribute(), release_bmd_api_str(), TERM_BOLD, TERM_RESET, and uv_to_bmd_codec_map.

Referenced by show_help().

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REGISTER_MODULE()

REGISTER_MODULE	(	decklink	,
		&	display_decklink_info,
		LIBRARY_CLASS_VIDEO_DISPLAY	,
		VIDEO_DISPLAY_ABI_VERSION	)

set_audio_props()

static void set_audio_props ( state_decklink * s, IDeckLinkConfiguration * deckLinkConfiguration, unsigned int audio_output )

static

Definition at line 1330 of file decklink.cpp.

{
        if (audio_output == 0U) {
                s->play_audio = false;
                return;
        }
        s->play_audio = true;
 
        int64_t max_aud_chans = 0;
        HRESULT result        = s->deckLinkAttributes->GetInt(
                BMDDeckLinkMaximumAudioChannels, &max_aud_chans);
        if (result != S_OK) {
                MSG(WARNING, "Cannot get maximum audio channels: %s\n",
                    bmd_hresult_to_string(result).c_str());
        } else {
                s->max_aud_chans = (int) max_aud_chans;
                CHECK_CH_COUNT(s->max_aud_chans);
        }
        MSG(VERBOSE, "Using maximum audio channels: %d\n", s->max_aud_chans);
 
        MSG(INFO, "Using audio output: %s\n",
            get_audio_conn_flag_name(audio_output));
 
        /* Actually no action is required to set audio connection because BMD
         * card plays audio through all its outputs (AES/SDI/analog) .... */
        BMDAudioOutputAnalogAESSwitch audioConnection{};
        switch (audio_output) {
        case DISPLAY_FLAG_AUDIO_EMBEDDED:
                return;
        case DISPLAY_FLAG_AUDIO_AESEBU:
                audioConnection = bmdAudioOutputSwitchAESEBU;
                break;
        case DISPLAY_FLAG_AUDIO_ANALOG:
                audioConnection = bmdAudioOutputSwitchAnalog;
                break;
        default:
                MSG(ERROR, "Unsupporetd audio connection: %d.\n", audio_output);
                abort();
        }
        /* .... one exception is a card that has switchable cables between
         * AES/EBU and analog. (But this applies only for channels 3 and above.)
         */
        result = deckLinkConfiguration->SetInt(
            bmdDeckLinkConfigAudioOutputAESAnalogSwitch, audioConnection);
        if (result == S_OK) { // has switchable channels
                MSG(INFO, "Card with switchable audio channels detected. "
                          "Switched to correct format.\n");
        } else if (result == E_NOTIMPL) {
                // normal case - without switchable channels
                MSG(VERBOSE,
                    "Not setting switchable AESEBU/analog - not supported.\n");
        } else {
                MSG(WARNING,
                    "Unable to switch audio output for channels 3 or "
                    "above although the card shall support it: %s\nCheck if "
                    "it is ok. Continuing anyway.\n",
                    bmd_hresult_to_string(result).c_str());
        }
}

References bmd_hresult_to_string(), CHECK_CH_COUNT, state_decklink::deckLinkAttributes, DISPLAY_FLAG_AUDIO_AESEBU, DISPLAY_FLAG_AUDIO_ANALOG, DISPLAY_FLAG_AUDIO_EMBEDDED, get_audio_conn_flag_name(), state_decklink::max_aud_chans, MSG, and state_decklink::play_audio.

Referenced by display_decklink_init().

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set_low_latency()

static void set_low_latency ( struct state_decklink * s, bool on )

static

Definition at line 1187 of file decklink.cpp.

{
        if (on) {
                MSG(WARNING, "Low latency option unneeded (implicit).\n");
                assert(s->low_latency); // check if really so
                return;
        }
        MSG(WARNING, "Deprecated, do not use - "
                     "see option \"synchroninzed\" instead.\n");
        s->low_latency = false;
}

References state_decklink::low_latency, and MSG.

Referenced by settings_init().

settings_init()

static bool settings_init ( struct state_decklink * s, const char * fmt, string & cardId )

static

Definition at line 1199 of file decklink.cpp.

                                {
        if (strlen(fmt) == 0) {
                return true;
        }
 
        auto tmp = static_cast<char *>(alloca(strlen(fmt) + 1));
        strcpy(tmp, fmt);
        char *ptr;
        char *save_ptr = nullptr;
 
        ptr = strtok_r(tmp, ":", &save_ptr);
        assert(ptr != nullptr);
        int i = 0;
        bool first_option_is_device = true;
        while (ptr[i] != '\0') {
                if (!isdigit(ptr[i]) && ptr[i] != ',') {
                        first_option_is_device = false;
                        break;
                }
                i++;
        }
        if (first_option_is_device) {
                log_msg(LOG_LEVEL_WARNING, MOD_NAME "Unnamed device index "
                                "deprecated. Use \"device=%s\" instead.\n", ptr);
                cardId = ptr;
                ptr = strtok_r(nullptr, ":", &save_ptr);
        }
 
        while (ptr != nullptr)  {
                const char *val = strchr(ptr, '=') + 1;
                if (IS_KEY_PREFIX(ptr, "device")) {
                        cardId = strchr(ptr, '=') + 1;
                } else if (IS_KEY_PREFIX(ptr, "profile")) {
                        s->profile_req.parse(strchr(ptr, '=') + 1);
                } else if (strcasecmp(ptr, "3D") == 0) {
                        s->stereo = true;
                } else if (strcasecmp(ptr, "timecode") == 0) {
                        s->emit_timecode = true;
                } else if (strcasecmp(ptr, "single-link") == 0) {
                        s->device_options[bmdDeckLinkConfigSDIOutputLinkConfiguration].set_int(bmdLinkConfigurationSingleLink);
                } else if (strcasecmp(ptr, "dual-link") == 0) {
                        s->device_options[bmdDeckLinkConfigSDIOutputLinkConfiguration].set_int(bmdLinkConfigurationDualLink);
                } else if (strcasecmp(ptr, "quad-link") == 0) {
                        s->device_options[bmdDeckLinkConfigSDIOutputLinkConfiguration].set_int(bmdLinkConfigurationQuadLink);
                } else if (strcasecmp(ptr, "full-duplex") == 0) {
                        s->profile_req.set_int(bmdProfileOneSubDeviceFullDuplex);
                } else if (strcasecmp(ptr, "half-duplex") == 0) {
                        s->profile_req.set_int(bmdDuplexHalf);
                } else if (strcasecmp(ptr, "simplex") == 0) {
                        s->profile_req.set_int(bmdProfileOneSubDeviceHalfDuplex);
                } else if (strcasecmp(ptr, "LevelA") == 0) {
                        s->device_options[bmdDeckLinkConfigSMPTELevelAOutput].set_flag(true);
                } else if (strcasecmp(ptr, "LevelB") == 0) {
                        s->device_options[bmdDeckLinkConfigSMPTELevelAOutput].set_flag(false);
                } else if (strncasecmp(ptr, "HDMI3DPacking=", strlen("HDMI3DPacking=")) == 0) {
                        char *packing = ptr + strlen("HDMI3DPacking=");
                        if (strcasecmp(packing, "SideBySideHalf") == 0) {
                                s->device_options[bmdDeckLinkConfigHDMI3DPackingFormat].set_int(bmdVideo3DPackingSidebySideHalf);
                        } else if (strcasecmp(packing, "LineByLine") == 0) {
                                s->device_options[bmdDeckLinkConfigHDMI3DPackingFormat].set_int(bmdVideo3DPackingLinebyLine);
                        } else if (strcasecmp(packing, "TopAndBottom") == 0) {
                                s->device_options[bmdDeckLinkConfigHDMI3DPackingFormat].set_int(bmdVideo3DPackingTopAndBottom);
                        } else if (strcasecmp(packing, "FramePacking") == 0) {
                                s->device_options[bmdDeckLinkConfigHDMI3DPackingFormat].set_int(bmdVideo3DPackingFramePacking);
                        } else if (strcasecmp(packing, "LeftOnly") == 0) {
                                s->device_options[bmdDeckLinkConfigHDMI3DPackingFormat].set_int(bmdVideo3DPackingRightOnly);
                        } else if (strcasecmp(packing, "RightOnly") == 0) {
                                s->device_options[bmdDeckLinkConfigHDMI3DPackingFormat].set_int(bmdVideo3DPackingLeftOnly);
                        } else {
                                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Unknown HDMI 3D packing %s.\n", packing);
                                return false;
                        }
                } else if (strncasecmp(ptr, "audio_level=", strlen("audio_level=")) == 0) {
                        s->device_options
                            [bmdDeckLinkConfigAnalogAudioConsumerLevels] =
                            bmd_option(bmd_parse_audio_levels(val));
                } else if (IS_KEY_PREFIX(ptr, "conversion")) {
                        s->device_options[bmdDeckLinkConfigVideoOutputConversionMode].parse(strchr(ptr, '=') + 1);
                } else if (is_prefix_of(ptr, "Use1080pNotPsF") || is_prefix_of(ptr, "Use1080PsF")) {
                        s->device_options[bmdDeckLinkConfigOutput1080pAsPsF].parse(strchr(ptr, '=') + 1);
                        if (strncasecmp(ptr, "Use1080pNotPsF", strlen("Use1080pNotPsF")) == 0) { // compat, inverse
                                s->device_options[bmdDeckLinkConfigOutput1080pAsPsF].set_flag(s->device_options[bmdDeckLinkConfigOutput1080pAsPsF].get_flag());
                        }
                } else if (strcasecmp(ptr, "low-latency") == 0 || strcasecmp(ptr, "no-low-latency") == 0) {
                        set_low_latency(s, strcasecmp(ptr, "low-latency") == 0);
                } else if (IS_PREFIX(ptr, "synchronized")) {
                        s->low_latency = false;
                        s->delegate.SetSynchronized(strchr(ptr, '='));
                } else if (strcasecmp(ptr, "quad-square") == 0 || strcasecmp(ptr, "no-quad-square") == 0) {
                        s->quad_square_division_split.set_flag(strcasecmp(ptr, "quad-square") == 0);
                } else if (strncasecmp(ptr, "hdr", strlen("hdr")) == 0) {
                        s->requested_hdr_mode.EOTF = static_cast<int64_t>(HDR_EOTF::HDR); // default
                        if (strncasecmp(ptr, "hdr=", strlen("hdr=")) == 0) {
                                try {
                                        s->requested_hdr_mode.Init(ptr + strlen("hdr="));
                                } catch (ug_no_error const &e) {
                                        return false;
                                } catch (exception const &e) {
                                        LOG(LOG_LEVEL_ERROR) << MOD_NAME << "HDR mode init: " << e.what() << "\n";
                                        return false;
                                }
                        }
                } else if (strstr(ptr, "keep-settings") == ptr) {
                        s->keep_device_defaults = true;
                } else if (strstr(ptr, "drift_fix") == ptr) {
                        s->audio_drift_fixer.enable();
                } else if (strncasecmp(ptr, "maxresample=", strlen("maxresample=")) == 0) {
                        s->audio_drift_fixer.set_max_hz(parse_uint32(strchr(ptr, '=') + 1));
                } else if (strncasecmp(ptr, "minresample=", strlen("minresample=")) == 0) {
                        s->audio_drift_fixer.set_min_hz(parse_uint32(strchr(ptr, '=') + 1));
                } else if (strncasecmp(ptr, "targetbuffer=", strlen("targetbuffer=")) == 0) {
                        s->audio_drift_fixer.set_target_buffer(parse_uint32(strchr(ptr, '=') + 1));
                } else if ((strchr(ptr, '=') != nullptr && strchr(ptr, '=') - ptr == 4) || strlen(ptr) == 4) {
                        s->device_options[(BMDDeckLinkConfigurationID) bmd_read_fourcc(ptr)].parse(strchr(ptr, '=') + 1);
                } else {
                        log_msg(LOG_LEVEL_ERROR, MOD_NAME "unknown option in config string: %s\n", ptr);
                        return false;
                }
                ptr = strtok_r(nullptr, ":", &save_ptr);
        }
 
        return true;
}

References state_decklink::audio_drift_fixer, bmd_parse_audio_levels(), bmd_read_fourcc(), state_decklink::delegate, state_decklink::device_options, state_decklink::emit_timecode, AudioDriftFixer::enable(), fmt, IS_KEY_PREFIX, IS_PREFIX, is_prefix_of(), state_decklink::keep_device_defaults, LOG, LOG_LEVEL_ERROR, LOG_LEVEL_WARNING, log_msg(), state_decklink::low_latency, MOD_NAME, bmd_option::parse(), parse_uint32(), state_decklink::profile_req, state_decklink::quad_square_division_split, state_decklink::requested_hdr_mode, bmd_option::set_flag(), bmd_option::set_int(), set_low_latency(), AudioDriftFixer::set_max_hz(), AudioDriftFixer::set_min_hz(), AudioDriftFixer::set_target_buffer(), state_decklink::stereo, and val.

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show_help()

static void show_help ( bool full, const char * query_prop_fcc = nullptr )

static

Parameters

query_prop_fcc

if not NULL, print corresponding BMDDeckLinkAttribute

Definition at line 550 of file decklink.cpp.

 {
        int                             numDevices = 0;
 
        col() << "DeckLink display options:\n";
        col() << SBOLD(SRED("\t-d decklink")
                       << "[:d[evice]=<device>][:Level{A|B}][:3D][:half-"
                          "duplex][:HDR[=<t>][:drift_fix]]\n");
        col() << SBOLD(SRED("\t-d decklink") << ":[full]help") << " | "
              << SBOLD(SRED("-d decklink") << ":query=<FourCC>"
                                              "\n");
        col() << "\nOptions:\n";
        if (!full) {
                col() << SBOLD("\tfullhelp") << "\tdisplay additional options and more details\n";
        }
        col() << SBOLD("\tdevice") << "\t\tindex or name of output device\n";
        col() << SBOLD("\tLevelA/LevelB") << "\tspecifies 3G-SDI output level\n";
        col() << SBOLD("\t3D") << "\t\t3D stream will be received (see also HDMI3DPacking option)\n";
        col() << SBOLD("\thalf-duplex | full-duplex | simplex")
              << "\tset a profile that allows maximal number of simultaneous "
                 "IOs / set device to better compatibility (3D, dual-link) / "
                 "use all connectors as single input\n";
        col() << SBOLD("\tHDR[=HDR|PQ|HLG|<int>|help]") << " - enable HDR metadata (optionally specifying EOTF, int 0-7 as per CEA 861.), help for extended help\n";
        col() << SBOLD("\tdrift_fix") << "       activates a time drift fix for the DeckLink cards with resampler (experimental)\n";
 
        col() << SBOLD("\t<option_FourCC>=<value>")
              << "\tarbitrary BMD option (given a FourCC) and corresponding "
                 "value, i.a.:\n";
        col()
            << SBOLD("\t\taacl[=no]")
            << "\tset maximum analog audio attenuation (consumer line level)\n";
        col() << SBOLD("\t\tvoio=blac|lafa")
              << "\tdisplay either black or last frame when idle\n";
 
        if (!full) {
                col() << SBOLD("\tconversion") << "\toutput size conversion, use '-d decklink:fullhelp' for list of conversions\n";
                col() << "\n\t(other options available, use \"" << SBOLD("fullhelp") << "\" to see complete list of options)\n";
        } else {
                col() << SBOLD("\tsingle-link/dual-link/quad-link") << "\tspecifies if the video output will be in a single-link (HD/3G/6G/12G), dual-link HD-SDI mode or quad-link HD/3G/6G/12G\n";
                col() << SBOLD("\ttimecode") << "\temit timecode\n";
                col() << SBOLD("\t[no-]quad-square") << " set Quad-link SDI is output in Square Division Quad Split mode\n";
                col() << SBOLD("\tsynchronized[=m[,M]]")
                      << " use regular scheduled mode for synchrized output"
                         "\n\t\t(m -  minimum "
                         "scheduled frames /default "
                      << PlaybackDelegate::DEFAULT_MIN_SCHED_FRAMES
                      << "/, M - max sched\n\t\tframes /default "
                      << PlaybackDelegate::DEFAULT_MAX_SCHED_FRAMES << "/), shortcut sync\n";
                col() << SBOLD("\tconversion") << "\toutput size conversion, can be:\n" <<
                                SBOLD("\t\tnone") << " - no conversion\n" <<
                                SBOLD("\t\tltbx") << " - down-converted letterbox SD\n" <<
                                SBOLD("\t\tamph") << " - down-converted anamorphic SD\n" <<
                                SBOLD("\t\t720c") << " - HD720 to HD1080 conversion\n" <<
                                SBOLD("\t\tHWlb") << " - simultaneous output of HD and down-converted letterbox SD\n" <<
                                SBOLD("\t\tHWam") << " - simultaneous output of HD and down-converted anamorphic SD\n" <<
                                SBOLD("\t\tHWcc") << " - simultaneous output of HD and center cut SD\n" <<
                                SBOLD("\t\txcap") << " - simultaneous output of 720p and 1080p cross-conversion\n" <<
                                SBOLD("\t\tua7p") << " - simultaneous output of SD and up-converted anamorphic 720p\n" <<
                                SBOLD("\t\tua1i") << " - simultaneous output of SD and up-converted anamorphic 1080i\n" <<
                                SBOLD("\t\tu47p") << " - simultaneous output of SD and up-converted anamorphic widescreen aspect ratio 14:9 to 720p\n" <<
                                SBOLD("\t\tu41i") << " - simultaneous output of SD and up-converted anamorphic widescreen aspect ratio 14:9 to 1080i\n" <<
                                SBOLD("\t\tup7p") << " - simultaneous output of SD and up-converted pollarbox 720p\n" <<
                                SBOLD("\t\tup1i") << " - simultaneous output of SD and up-converted pollarbox 1080i\n";
                col() << SBOLD("\tHDMI3DPacking") << " can be (used in conjunction with \"3D\" option):\n" <<
                                SBOLD("\t\tSideBySideHalf, LineByLine, TopAndBottom, FramePacking, LeftOnly, RightOnly\n");
                col() << SBOLD("\tUse1080PsF[=true|false|keep]") << " flag sets use of PsF on output instead of progressive (default is false)\n";
                col() << SBOLD("\tprofile=<P>") << "\tuse desired device profile:\n";
                print_bmd_device_profiles("\t\t");
                col() << SBOLD("\tmaxresample=<N>") << " maximum amount the resample delta can be when scaling is applied. Measured in Hz\n";
                col() << SBOLD("\tminresample=<N>") << " minimum amount the resample delta can be when scaling is applied. Measured in Hz\n";
                col() << SBOLD("\ttargetbuffer=<N>") << " target amount of samples to have in the buffer (per channel)\n";
                col() << SBOLD("\tkeep-settings") << "\tdo not apply any DeckLink settings by UG than required (keep user-selected defaults)\n";
                col() << SBOLD("\tquery=<FourCC>") << "\tquery specified device argument in help listing\n";
        }
 
        col() << "\nRecognized pixel formats:";
        for_each(uv_to_bmd_codec_map.cbegin(), uv_to_bmd_codec_map.cend(), [](auto const &i) { col() << " " << SBOLD(get_codec_name(i.first)); } );
        cout << "\n";
 
        col() << "Devices (idx, topological ID, name):\n";
        // Create an IDeckLinkIterator object to enumerate all DeckLink cards in the system
        bool com_initialized = false;
        
        // Enumerate all cards in this system
        const bool natural_sort =
            get_commandline_param(BMD_NAT_SORT) != nullptr;
        for (auto &d :
             bmd_get_sorted_devices(&com_initialized, true, natural_sort)) {
                IDeckLink *deckLink = get<0>(d).get();
                string deviceName = bmd_get_device_name(deckLink);
                if (deviceName.empty()) {
                        deviceName = "(unable to get name)";
                }
 
                char index[STR_LEN] = "";
                if (!natural_sort) {
                        snprintf(index, sizeof index,
                                 TBOLD("%c") ") ", get<char>(d));
                }
                if (full || natural_sort) {
                        snprintf(index + strlen(index),
                                 sizeof index - strlen(index), TBOLD("%d") ") ",
                                 get<int>(d));
                }
                // *** Print the model name of the DeckLink card
                color_printf("\t%s" TBOLD("%6x") ") " TBOLD(
                                 TGREEN("%s")) "\n",
                             index, get<unsigned>(d),
                             deviceName.c_str());
                if (full) {
                        print_output_modes(deckLink, query_prop_fcc);
                }
 
                // Increment the total number of DeckLink cards found
                numDevices++;
        }
 
        if (!full) {
                col() << "(use \"" << SBOLD("fullhelp") << "\" to see device modes)\n";
        }
 
        decklink_uninitialize(&com_initialized);
 
        // If no DeckLink cards were found in the system, inform the user
        if (numDevices == 0)
        {
                log_msg(LOG_LEVEL_WARNING, "\nNo Blackmagic Design devices were found.\n");
                return;
        } 
 
        printf("\n");
        if (full) {
                print_decklink_version();
                printf("\n");
        }
 }

References bmd_get_device_name(), bmd_get_sorted_devices(), BMD_NAT_SORT, color_printf(), decklink_uninitialize(), get_commandline_param(), LOG_LEVEL_WARNING, log_msg(), print_bmd_device_profiles(), print_decklink_version(), print_output_modes(), SBOLD, SRED, STR_LEN, TBOLD, TGREEN, and uv_to_bmd_codec_map.

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update_timecode()

static void update_timecode ( DeckLinkTimecode * tc, double fps )

static

Definition at line 763 of file decklink.cpp.

{
        const float epsilon = 0.005;
        uint8_t hours, minutes, seconds, frames;
        BMDTimecodeBCD bcd;
        bool dropFrame = false;
 
        if(ceil(fps) - fps > epsilon) { /* NTSCi drop framecode  */
                dropFrame = true;
        }
 
        tc->GetComponents (&hours, &minutes, &seconds, &frames);
        frames++;
 
        if((double) frames > fps - epsilon) {
                frames = 0;
                seconds++;
                if(seconds >= 60) {
                        seconds = 0;
                        minutes++;
                        if(dropFrame) {
                                if(minutes % 10 != 0)
                                        seconds = 2;
                        }
                        if(minutes >= 60) {
                                minutes = 0;
                                hours++;
                                if(hours >= 24) {
                                        hours = 0;
                                }
                        }
                }
        }
 
        bcd = (frames % 10) | (frames / 10) << 4 | (seconds % 10) << 8 | (seconds / 10) << 12 | (minutes % 10)  << 16 | (minutes / 10) << 20 |
                (hours % 10) << 24 | (hours / 10) << 28;
 
        tc->SetBCD(bcd);
}

References video_frame::fps.

Referenced by display_decklink_putf().

Variable Documentation

display_decklink_info

const struct video_display_info display_decklink_info

static

Initial value:

= {
        display_decklink_probe,
        display_decklink_init,
        NULL, 
        display_decklink_done,
        display_decklink_getf,
        display_decklink_putf,
        display_decklink_reconfigure,
        display_decklink_get_property,
        display_decklink_put_audio_frame,
        display_decklink_reconfigure_audio,
        MOD_NAME,
}

Definition at line 2256 of file decklink.cpp.

                                                               {
        display_decklink_probe,
        display_decklink_init,
        NULL, // _run
        display_decklink_done,
        display_decklink_getf,
        display_decklink_putf,
        display_decklink_reconfigure,
        display_decklink_get_property,
        display_decklink_put_audio_frame,
        display_decklink_reconfigure_audio,
        MOD_NAME,
};