/* * Blackmagic DeckLink output * Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* Include internal.h first to avoid conflict between winsock.h (used by * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */extern "C" {#include "libavformat/internal.h"} #include <DeckLinkAPI.h>#ifdef _WIN32#include <DeckLinkAPI_i.c>#else/* The file provided by the SDK is known to be missing prototypes, which doesn't   cause issues with GCC since the warning doesn't apply to C++ files.  However   Clang does complain (and warnings are treated as errors), so suppress the   warning just for this one file */#ifdef __clang__#pragma clang diagnostic push#pragma clang diagnostic ignored "-Wmissing-prototypes"#endif#include <DeckLinkAPIDispatch.cpp>#ifdef __clang__#pragma clang diagnostic pop#endif#endif extern "C" {#include "libavformat/avformat.h"#include "libavutil/imgutils.h"#include "libavutil/intreadwrite.h"#include "libavutil/bswap.h"#include "avdevice.h"} #include "decklink_common.h" static IDeckLinkIterator *decklink_create_iterator(AVFormatContext *avctx){    IDeckLinkIterator *iter; #ifdef _WIN32    if (CoInitialize(NULL) < 0) {        av_log(avctx, AV_LOG_ERROR, "COM initialization failed.\n");        return NULL;    }     if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,                         IID_IDeckLinkIterator, (void**) &iter) != S_OK) {        iter = NULL;    }#else    iter = CreateDeckLinkIteratorInstance();#endif    if (!iter)        av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator. "                                    "Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n");     return iter;} static int decklink_get_attr_string(IDeckLink *dl, BMDDeckLinkAttributeID cfg_id, const char **s){    DECKLINK_STR tmp;    HRESULT hr;    IDeckLinkProfileAttributes *attr;    *s = NULL;    if (dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&attr) != S_OK)        return AVERROR_EXTERNAL;    hr = attr->GetString(cfg_id, &tmp);    attr->Release();    if (hr == S_OK) {        *s = DECKLINK_STRDUP(tmp);        DECKLINK_FREE(tmp);        if (!*s)            return AVERROR(ENOMEM);    } else if (hr == E_FAIL) {        return AVERROR_EXTERNAL;    }    return 0;} static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id){    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;    BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;    int64_t bmd_input              = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;    const char *type_name          = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";    int64_t supported_connections = 0;    HRESULT res;     if (bmd_input) {        res = ctx->attr->GetInt(attr_id, &supported_connections);        if (res != S_OK) {            av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);            return AVERROR_EXTERNAL;        }        if ((supported_connections & bmd_input) != bmd_input) {            av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);            return AVERROR(ENOSYS);        }        res = ctx->cfg->SetInt(cfg_id, bmd_input);        if (res != S_OK) {            av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);            return AVERROR_EXTERNAL;        }    }    return 0;} static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order){    if (field_order == AV_FIELD_UNKNOWN)        return true;    if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)        return true;    if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)        return true;    if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))        return true;    return false;} int ff_decklink_set_configs(AVFormatContext *avctx,                            decklink_direction_t direction) {    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;    HRESULT res;     if (ctx->duplex_mode) {        DECKLINK_BOOL duplex_supported = false; #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000        IDeckLinkProfileManager *manager = NULL;        if (ctx->dl->QueryInterface(IID_IDeckLinkProfileManager, (void **)&manager) == S_OK)            duplex_supported = true;#else        if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)            duplex_supported = false;#endif         if (duplex_supported) {#if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000            IDeckLinkProfile *profile = NULL;            BMDProfileID bmd_profile_id = ctx->duplex_mode == 2 ? bmdProfileOneSubDeviceFullDuplex : bmdProfileTwoSubDevicesHalfDuplex;            res = manager->GetProfile(bmd_profile_id, &profile);            if (res == S_OK) {                res = profile->SetActive();                profile->Release();            }            manager->Release();#else            res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);#endif            if (res != S_OK)                av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");            else                av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");        } else {            av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");        }    }    if (direction == DIRECTION_IN) {        int ret;        ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);        if (ret < 0)            return ret;        ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);        if (ret < 0)            return ret;    }    if (direction == DIRECTION_OUT && cctx->timing_offset != INT_MIN) {        res = ctx->cfg->SetInt(bmdDeckLinkConfigReferenceInputTimingOffset, cctx->timing_offset);        if (res != S_OK)            av_log(avctx, AV_LOG_WARNING, "Setting timing offset failed.\n");    }    return 0;} int ff_decklink_set_format(AVFormatContext *avctx,                               int width, int height,                               int tb_num, int tb_den,                               enum AVFieldOrder field_order,                               decklink_direction_t direction){    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;#if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000    DECKLINK_BOOL support;#else    BMDDisplayModeSupport support;#endif    IDeckLinkDisplayModeIterator *itermode;    IDeckLinkDisplayMode *mode;    int i = 1;    HRESULT res;     av_log(avctx, AV_LOG_DEBUG, "Trying to find mode for frame size %dx%d, frame timing %d/%d, field order %d, direction %d, format code %s\n",        width, height, tb_num, tb_den, field_order, direction, cctx->format_code ? cctx->format_code : "(unset)");     if (direction == DIRECTION_IN) {        res = ctx->dli->GetDisplayModeIterator (&itermode);    } else {        res = ctx->dlo->GetDisplayModeIterator (&itermode);    }     if (res!= S_OK) {            av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");            return AVERROR(EIO);    }     char format_buf[] = "    ";    if (cctx->format_code)        memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));    BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);    AVRational target_tb = av_make_q(tb_num, tb_den);    ctx->bmd_mode = bmdModeUnknown;    while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {        BMDTimeValue bmd_tb_num, bmd_tb_den;        int bmd_width  = mode->GetWidth();        int bmd_height = mode->GetHeight();        BMDDisplayMode bmd_mode = mode->GetDisplayMode();        BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();         mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);        AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);         if ((bmd_width == width &&             bmd_height == height &&             !av_cmp_q(mode_tb, target_tb) &&             field_order_eq(field_order, bmd_field_dominance))             || target_mode == bmd_mode) {            ctx->bmd_mode   = bmd_mode;            ctx->bmd_width  = bmd_width;            ctx->bmd_height = bmd_height;            ctx->bmd_tb_den = bmd_tb_den;            ctx->bmd_tb_num = bmd_tb_num;            ctx->bmd_field_dominance = bmd_field_dominance;            av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",                bmd_width, bmd_height, 1/av_q2d(mode_tb),                (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");        }         mode->Release();        i++;    }     itermode->Release();     if (ctx->bmd_mode == bmdModeUnknown)        return -1; #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b050000    if (direction == DIRECTION_IN) {        BMDDisplayMode actualMode = ctx->bmd_mode;        if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,                                           bmdNoVideoInputConversion, bmdSupportedVideoModeDefault,                                           &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode)            return -1;    } else {        BMDDisplayMode actualMode = ctx->bmd_mode;        if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,                                           bmdNoVideoOutputConversion, bmdSupportedVideoModeDefault,                                           &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode)            return -1;    }    return 0;#elif BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000    if (direction == DIRECTION_IN) {        if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,                                           bmdSupportedVideoModeDefault,                                           &support) != S_OK)            return -1;    } else {        BMDDisplayMode actualMode = ctx->bmd_mode;        if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,                                           bmdSupportedVideoModeDefault,                                           &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode) {            return -1;        }     }    if (support)        return 0;#else    if (direction == DIRECTION_IN) {        if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,                                           bmdVideoOutputFlagDefault,                                           &support, NULL) != S_OK)            return -1;    } else {        if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,                                                                  bmdVideoOutputVANC,                                                                  &support, NULL) != S_OK || support != bmdDisplayModeSupported) {            /* Try without VANC enabled */            if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,                                               bmdVideoOutputFlagDefault,                                               &support, NULL) != S_OK) {                return -1;            }            ctx->supports_vanc = 0;        }     }    if (support == bmdDisplayModeSupported)        return 0;#endif     return -1;} int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction) {    return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction);} int ff_decklink_list_devices(AVFormatContext *avctx,                             struct AVDeviceInfoList *device_list,                             int show_inputs, int show_outputs){    IDeckLink *dl = NULL;    IDeckLinkIterator *iter = decklink_create_iterator(avctx);    int ret = 0;     if (!iter)        return AVERROR(EIO);     while (ret == 0 && iter->Next(&dl) == S_OK) {        IDeckLinkOutput *output_config;        IDeckLinkInput *input_config;        const char *display_name = NULL;        const char *unique_name = NULL;        AVDeviceInfo *new_device = NULL;        int add = 0;         ret = decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);        if (ret < 0)            goto next;        ret = decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);        if (ret < 0)            goto next;         if (show_outputs) {            if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {                output_config->Release();                add = 1;            }        }         if (show_inputs) {            if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {                input_config->Release();                add = 1;            }        }         if (add == 1) {            new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));            if (!new_device) {                ret = AVERROR(ENOMEM);                goto next;            }             new_device->device_name = av_strdup(unique_name ? unique_name : display_name);            new_device->device_description = av_strdup(display_name);             if (!new_device->device_name ||                !new_device->device_description ||                av_dynarray_add_nofree(&device_list->devices, &device_list->nb_devices, new_device) < 0) {                ret = AVERROR(ENOMEM);                av_freep(&new_device->device_name);                av_freep(&new_device->device_description);                av_freep(&new_device);                goto next;            }        }     next:        av_freep(&display_name);        av_freep(&unique_name);        dl->Release();    }    iter->Release();    return ret;} /* This is a wrapper around the ff_decklink_list_devices() which dumps the   output to av_log() and exits (for backward compatibility with the   "-list_devices" argument). */void ff_decklink_list_devices_legacy(AVFormatContext *avctx,                                     int show_inputs, int show_outputs){    struct AVDeviceInfoList *device_list = NULL;    int ret;     device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));    if (!device_list)        return;     ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);    if (ret == 0) {        av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",               show_inputs ? "input" : "output");        for (int i = 0; i < device_list->nb_devices; i++) {            av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_description);        }    }    avdevice_free_list_devices(&device_list);} int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction){    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;    IDeckLinkDisplayModeIterator *itermode;    IDeckLinkDisplayMode *mode;    uint32_t format_code;    HRESULT res;     if (direction == DIRECTION_IN) {        int ret;        ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);        if (ret < 0)            return ret;        ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);        if (ret < 0)            return ret;        res = ctx->dli->GetDisplayModeIterator (&itermode);    } else {        res = ctx->dlo->GetDisplayModeIterator (&itermode);    }     if (res!= S_OK) {            av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");            return AVERROR(EIO);    }     av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",               avctx->url);    while (itermode->Next(&mode) == S_OK) {        BMDTimeValue tb_num, tb_den;        mode->GetFrameRate(&tb_num, &tb_den);        format_code = av_bswap32(mode->GetDisplayMode());        av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",                (char*) &format_code, mode->GetWidth(), mode->GetHeight(),                (int) tb_den, (int) tb_num);        switch (mode->GetFieldDominance()) {        case bmdLowerFieldFirst:        av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;        case bmdUpperFieldFirst:        av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;        }        mode->Release();    }    av_log(avctx, AV_LOG_INFO, "\n");     itermode->Release();     return 0;} void ff_decklink_cleanup(AVFormatContext *avctx){    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;     if (ctx->dli)        ctx->dli->Release();    if (ctx->dlo)        ctx->dlo->Release();    if (ctx->attr)        ctx->attr->Release();    if (ctx->cfg)        ctx->cfg->Release();    if (ctx->dl)        ctx->dl->Release();} int ff_decklink_init_device(AVFormatContext *avctx, const char* name){    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

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