/* * 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"); } else { IDeckLinkAPIInformation *api; int64_t version; #ifdef _WIN32 if (CoCreateInstance(CLSID_CDeckLinkAPIInformation, NULL, CLSCTX_ALL, IID_IDeckLinkAPIInformation, (void**) &api) != S_OK) { api = NULL; } #else api = CreateDeckLinkAPIInformationInstance(); #endif if (api && api->GetInt(BMDDeckLinkAPIVersion, &version) == S_OK) { if (version < BLACKMAGIC_DECKLINK_API_VERSION) av_log(avctx, AV_LOG_WARNING, "Installed DeckLink drivers are too old and may be incompatible with the SDK this module was built against. " "Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n"); } else { av_log(avctx, AV_LOG_ERROR, "Failed to check installed DeckLink API version.\n"); } if (api) api->Release(); } 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; if (ctx->duplex_mode < 0 || ctx->duplex_mode >= FF_ARRAY_ELEMS(decklink_profile_id_map)) return EINVAL; bmd_profile_id = decklink_profile_id_map[ctx->duplex_mode]; 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 || ctx->duplex_mode == 4 ? "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"); } if (direction == DIRECTION_OUT && ctx->link > 0) { res = ctx->cfg->SetInt(bmdDeckLinkConfigSDIOutputLinkConfiguration, ctx->link); if (res != S_OK) av_log(avctx, AV_LOG_WARNING, "Setting link configuration failed.\n"); else av_log(avctx, AV_LOG_VERBOSE, "Successfully set link configuration: 0x%x.\n", ctx->link); if (ctx->link == bmdLinkConfigurationQuadLink && cctx->sqd >= 0) { res = ctx->cfg->SetFlag(bmdDeckLinkConfigQuadLinkSDIVideoOutputSquareDivisionSplit, cctx->sqd); if (res != S_OK) av_log(avctx, AV_LOG_WARNING, "Setting SquareDivisionSplit failed.\n"); else av_log(avctx, AV_LOG_VERBOSE, "Successfully set SquareDivisionSplit.\n"); } } if (direction == DIRECTION_OUT && cctx->level_a >= 0) { DECKLINK_BOOL level_a_supported = false; if (ctx->attr->GetFlag(BMDDeckLinkSupportsSMPTELevelAOutput, &level_a_supported) != S_OK) level_a_supported = false; if (level_a_supported) { res = ctx->cfg->SetFlag(bmdDeckLinkConfigSMPTELevelAOutput, cctx->level_a); if (res != S_OK) av_log(avctx, AV_LOG_WARNING, "Setting SMPTE levelA failed.\n"); else av_log(avctx, AV_LOG_VERBOSE, "Successfully set SMPTE levelA.\n"); } else { av_log(avctx, AV_LOG_WARNING, "Unable to set SMPTE levelA mode, because it is not supported.\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, ctx->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, ctx->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, ctx->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); } void ff_decklink_packet_queue_init(AVFormatContext *avctx, DecklinkPacketQueue *q, int64_t queue_size) { memset(q, 0, sizeof(DecklinkPacketQueue)); pthread_mutex_init(&q->mutex, NULL); pthread_cond_init(&q->cond, NULL); q->avctx = avctx; q->max_q_size = queue_size; } void ff_decklink_packet_queue_flush(DecklinkPacketQueue *q) { AVPacket pkt; pthread_mutex_lock(&q->mutex); while (avpriv_packet_list_get(&q->pkt_list, &pkt) == 0) { av_packet_unref(&pkt); } q->nb_packets = 0; q->size = 0; pthread_mutex_unlock(&q->mutex); } void ff_decklink_packet_queue_end(DecklinkPacketQueue *q) { ff_decklink_packet_queue_flush(q); pthread_mutex_destroy(&q->mutex); pthread_cond_destroy(&q->cond); } unsigned long long ff_decklink_packet_queue_size(DecklinkPacketQueue *q) { unsigned long long size; pthread_mutex_lock(&q->mutex); size = q->size; pthread_mutex_unlock(&q->mutex); return size; } int ff_decklink_packet_queue_put(DecklinkPacketQueue *q, AVPacket *pkt) { int pkt_size = pkt->size; int ret; // Drop Packet if queue size is > maximum queue size if (ff_decklink_packet_queue_size(q) > (uint64_t)q->max_q_size) { av_packet_unref(pkt); av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n"); return -1; } /* ensure the packet is reference counted */ if (av_packet_make_refcounted(pkt) < 0) { av_packet_unref(pkt); return -1; } pthread_mutex_lock(&q->mutex); ret = avpriv_packet_list_put(&q->pkt_list, pkt, NULL, 0); if (ret == 0) { q->nb_packets++; q->size += pkt_size + sizeof(AVPacket); pthread_cond_signal(&q->cond); } else { av_packet_unref(pkt); } pthread_mutex_unlock(&q->mutex); return ret; } int ff_decklink_packet_queue_get(DecklinkPacketQueue *q, AVPacket *pkt, int block) { int ret; pthread_mutex_lock(&q->mutex); for (;; ) { ret = avpriv_packet_list_get(&q->pkt_list, pkt); if (ret == 0) { q->nb_packets--; q->size -= pkt->size + sizeof(AVPacket); ret = 1; break; } else if (!block) { ret = 0; break; } else { pthread_cond_wait(&q->cond, &q->mutex); } } pthread_mutex_unlock(&q->mutex); return ret; } int64_t ff_decklink_packet_queue_peekpts(DecklinkPacketQueue *q) { PacketListEntry *pkt1; int64_t pts = -1; pthread_mutex_lock(&q->mutex); pkt1 = q->pkt_list.head; if (pkt1) { pts = pkt1->pkt.pts; } pthread_mutex_unlock(&q->mutex); return pts; } 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; IDeckLink *dl = NULL; IDeckLinkIterator *iter = decklink_create_iterator(avctx); if (!iter) return AVERROR_EXTERNAL; while (iter->Next(&dl) == S_OK) { const char *display_name = NULL; const char *unique_name = NULL; decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name); decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name); if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) { av_free((void *)unique_name); av_free((void *)display_name); ctx->dl = dl; break; } av_free((void *)display_name); av_free((void *)unique_name); dl->Release(); } iter->Release(); if (!ctx->dl) return AVERROR(ENXIO); if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) { av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name); ff_decklink_cleanup(avctx); return AVERROR_EXTERNAL; } if (ctx->dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&ctx->attr) != S_OK) { av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name); ff_decklink_cleanup(avctx); return AVERROR_EXTERNAL; } return 0; }