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FFmpeg/libavdevice/decklink_common.cpp

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/*
* 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)
{
struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;
memset(q, 0, sizeof(DecklinkPacketQueue));
pthread_mutex_init(&q->mutex, NULL);
pthread_cond_init(&q->cond, NULL);
q->avctx = avctx;
q->max_q_size = ctx->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;
}
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;
}