2 * Blackmagic DeckLink output
3 * Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 /* Include internal.h first to avoid conflict between winsock.h (used by
23 * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
25 #include "libavformat/internal.h"
28 #include <DeckLinkAPI.h>
30 #include <DeckLinkAPI_i.c>
32 /* The file provided by the SDK is known to be missing prototypes, which doesn't
33 cause issues with GCC since the warning doesn't apply to C++ files. However
34 Clang does complain (and warnings are treated as errors), so suppress the
35 warning just for this one file */
37 #pragma clang diagnostic push
38 #pragma clang diagnostic ignored "-Wmissing-prototypes"
40 #include <DeckLinkAPIDispatch.cpp>
42 #pragma clang diagnostic pop
47 #include "libavformat/avformat.h"
48 #include "libavutil/imgutils.h"
49 #include "libavutil/intreadwrite.h"
50 #include "libavutil/bswap.h"
54 #include "decklink_common.h"
56 static IDeckLinkIterator *decklink_create_iterator(AVFormatContext *avctx)
58 IDeckLinkIterator *iter;
61 if (CoInitialize(NULL) < 0) {
62 av_log(avctx, AV_LOG_ERROR, "COM initialization failed.\n");
66 if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
67 IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
71 iter = CreateDeckLinkIteratorInstance();
74 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator. "
75 "Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n");
80 int decklink_get_attr_string(IDeckLink *dl, BMDDeckLinkAttributeID cfg_id, const char **s)
84 IDeckLinkAttributes *attr;
86 if (dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&attr) != S_OK)
87 return AVERROR_EXTERNAL;
88 hr = attr->GetString(cfg_id, &tmp);
91 *s = DECKLINK_STRDUP(tmp);
94 return AVERROR(ENOMEM);
95 } else if (hr == E_FAIL) {
96 return AVERROR_EXTERNAL;
101 static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id)
103 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
104 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
105 BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;
106 int64_t bmd_input = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;
107 const char *type_name = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";
108 int64_t supported_connections = 0;
112 res = ctx->attr->GetInt(attr_id, &supported_connections);
114 av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);
115 return AVERROR_EXTERNAL;
117 if ((supported_connections & bmd_input) != bmd_input) {
118 av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);
119 return AVERROR(ENOSYS);
121 res = ctx->cfg->SetInt(cfg_id, bmd_input);
123 av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);
124 return AVERROR_EXTERNAL;
130 static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)
132 if (field_order == AV_FIELD_UNKNOWN)
134 if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)
136 if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)
138 if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))
143 int ff_decklink_set_configs(AVFormatContext *avctx,
144 decklink_direction_t direction) {
145 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
146 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
149 if (ctx->duplex_mode) {
150 DECKLINK_BOOL duplex_supported = false;
152 if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
153 duplex_supported = false;
155 if (duplex_supported) {
156 res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
158 av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");
160 av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");
162 av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");
165 if (direction == DIRECTION_IN) {
167 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
170 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
177 int ff_decklink_set_format(AVFormatContext *avctx,
178 int width, int height,
179 int tb_num, int tb_den,
180 enum AVFieldOrder field_order,
181 decklink_direction_t direction, int num)
183 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
184 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
185 BMDDisplayModeSupport support;
186 IDeckLinkDisplayModeIterator *itermode;
187 IDeckLinkDisplayMode *mode;
191 av_log(avctx, AV_LOG_DEBUG, "Trying to find mode for frame size %dx%d, frame timing %d/%d, field order %d, direction %d, mode number %d, format code %s\n",
192 width, height, tb_num, tb_den, field_order, direction, num, (cctx->format_code) ? cctx->format_code : "(unset)");
194 if (direction == DIRECTION_IN) {
195 res = ctx->dli->GetDisplayModeIterator (&itermode);
197 res = ctx->dlo->GetDisplayModeIterator (&itermode);
201 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
205 char format_buf[] = " ";
206 if (cctx->format_code)
207 memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));
208 BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);
209 AVRational target_tb = av_make_q(tb_num, tb_den);
210 ctx->bmd_mode = bmdModeUnknown;
211 while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
212 BMDTimeValue bmd_tb_num, bmd_tb_den;
213 int bmd_width = mode->GetWidth();
214 int bmd_height = mode->GetHeight();
215 BMDDisplayMode bmd_mode = mode->GetDisplayMode();
216 BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();
218 mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
219 AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
221 if ((bmd_width == width &&
222 bmd_height == height &&
223 !av_cmp_q(mode_tb, target_tb) &&
224 field_order_eq(field_order, bmd_field_dominance))
226 || target_mode == bmd_mode) {
227 ctx->bmd_mode = bmd_mode;
228 ctx->bmd_width = bmd_width;
229 ctx->bmd_height = bmd_height;
230 ctx->bmd_tb_den = bmd_tb_den;
231 ctx->bmd_tb_num = bmd_tb_num;
232 ctx->bmd_field_dominance = bmd_field_dominance;
233 av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
234 bmd_width, bmd_height, 1/av_q2d(mode_tb),
235 (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
244 if (ctx->bmd_mode == bmdModeUnknown)
246 if (direction == DIRECTION_IN) {
247 if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
248 bmdVideoOutputFlagDefault,
249 &support, NULL) != S_OK)
252 if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
254 &support, NULL) != S_OK) {
255 /* Try without VANC enabled */
256 if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
257 bmdVideoOutputFlagDefault,
258 &support, NULL) != S_OK) {
261 ctx->supports_vanc = 0;
265 if (support == bmdDisplayModeSupported)
271 int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
272 return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction, num);
275 int ff_decklink_list_devices(AVFormatContext *avctx,
276 struct AVDeviceInfoList *device_list,
277 int show_inputs, int show_outputs)
279 IDeckLink *dl = NULL;
280 IDeckLinkIterator *iter = decklink_create_iterator(avctx);
286 while (ret == 0 && iter->Next(&dl) == S_OK) {
287 IDeckLinkOutput *output_config;
288 IDeckLinkInput *input_config;
289 const char *display_name = NULL;
290 const char *unique_name = NULL;
291 AVDeviceInfo *new_device = NULL;
294 ret = decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
297 ret = decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
302 if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {
303 output_config->Release();
309 if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {
310 input_config->Release();
316 new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));
318 ret = AVERROR(ENOMEM);
322 new_device->device_name = av_strdup(unique_name ? unique_name : display_name);
323 new_device->device_description = av_strdup(display_name);
325 if (!new_device->device_name ||
326 !new_device->device_description ||
327 av_dynarray_add_nofree(&device_list->devices, &device_list->nb_devices, new_device) < 0) {
328 ret = AVERROR(ENOMEM);
329 av_freep(&new_device->device_name);
330 av_freep(&new_device->device_description);
331 av_freep(&new_device);
337 av_freep(&display_name);
338 av_freep(&unique_name);
345 /* This is a wrapper around the ff_decklink_list_devices() which dumps the
346 output to av_log() and exits (for backward compatibility with the
347 "-list_devices" argument). */
348 void ff_decklink_list_devices_legacy(AVFormatContext *avctx,
349 int show_inputs, int show_outputs)
351 struct AVDeviceInfoList *device_list = NULL;
354 device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));
358 ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);
360 av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",
361 show_inputs ? "input" : "output");
362 for (int i = 0; i < device_list->nb_devices; i++) {
363 av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_description);
366 avdevice_free_list_devices(&device_list);
369 int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
371 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
372 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
373 IDeckLinkDisplayModeIterator *itermode;
374 IDeckLinkDisplayMode *mode;
375 uint32_t format_code;
378 if (direction == DIRECTION_IN) {
380 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
383 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
386 res = ctx->dli->GetDisplayModeIterator (&itermode);
388 res = ctx->dlo->GetDisplayModeIterator (&itermode);
392 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
396 av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",
398 while (itermode->Next(&mode) == S_OK) {
399 BMDTimeValue tb_num, tb_den;
400 mode->GetFrameRate(&tb_num, &tb_den);
401 format_code = av_bswap32(mode->GetDisplayMode());
402 av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",
403 (char*) &format_code, mode->GetWidth(), mode->GetHeight(),
404 (int) tb_den, (int) tb_num);
405 switch (mode->GetFieldDominance()) {
406 case bmdLowerFieldFirst:
407 av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
408 case bmdUpperFieldFirst:
409 av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
413 av_log(avctx, AV_LOG_INFO, "\n");
420 void ff_decklink_cleanup(AVFormatContext *avctx)
422 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
423 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
430 ctx->attr->Release();
437 int ff_decklink_init_device(AVFormatContext *avctx, const char* name)
439 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
440 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
441 IDeckLink *dl = NULL;
442 IDeckLinkIterator *iter = decklink_create_iterator(avctx);
444 return AVERROR_EXTERNAL;
446 while (iter->Next(&dl) == S_OK) {
447 const char *display_name = NULL;
448 const char *unique_name = NULL;
449 decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
450 decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
451 if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) {
452 av_free((void *)unique_name);
453 av_free((void *)display_name);
457 av_free((void *)display_name);
458 av_free((void *)unique_name);
463 return AVERROR(ENXIO);
465 if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
466 av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
467 ff_decklink_cleanup(avctx);
468 return AVERROR_EXTERNAL;
471 if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
472 av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
473 ff_decklink_cleanup(avctx);
474 return AVERROR_EXTERNAL;