FFmpeg: libavdevice/decklink_common.cpp Source File

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libavdevice

decklink_common.cpp

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1 /*

2 * Blackmagic DeckLink output

4 *

5 * This file is part of FFmpeg.

6 *

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.

11 *

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.

16 *

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

20 */

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 */

24 extern "C" {

25 #include "libavformat/internal.h"

26 }

28 #include <DeckLinkAPI.h>

29 #ifdef _WIN32

30 #include <DeckLinkAPI_i.c>

31 #else

32 #include <DeckLinkAPIDispatch.cpp>

33 #endif

35 extern "C" {

36 #include "libavformat/avformat.h"

37 #include "libavutil/imgutils.h"

38 #include "libavutil/intreadwrite.h"

39 #include "libavutil/bswap.h"

40 #include "avdevice.h"

41 }

43 #include "decklink_common.h"

45 #ifdef _WIN32

46 IDeckLinkIterator *CreateDeckLinkIteratorInstance(void)

47 {

48 IDeckLinkIterator *iter;

50 if (CoInitialize(NULL) < 0) {

51 av_log(NULL, AV_LOG_ERROR, "COM initialization failed.\n");

52 return NULL;

53 }

55 if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,

56 IID_IDeckLinkIterator, (void**) &iter) != S_OK) {

57 av_log(NULL, AV_LOG_ERROR, "DeckLink drivers not installed.\n");

58 return NULL;

59 }

61 return iter;

62 }

63 #endif

65 #ifdef _WIN32

66 static char *dup_wchar_to_utf8(wchar_t *w)

67 {

68 char *s = NULL;

69 int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);

70 s = (char *) av_malloc(l);

71 if (s)

72 WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);

73 return s;

74 }

75 #define DECKLINK_STR OLECHAR *

76 #define DECKLINK_STRDUP dup_wchar_to_utf8

77 #define DECKLINK_FREE(s) SysFreeString(s)

78 #define DECKLINK_BOOL BOOL

79 #elif defined(__APPLE__)

80 static char *dup_cfstring_to_utf8(CFStringRef w)

81 {

82 char s[256];

83 CFStringGetCString(w, s, 255, kCFStringEncodingUTF8);

84 return av_strdup(s);

85 }

86 #define DECKLINK_STR const __CFString *

87 #define DECKLINK_STRDUP dup_cfstring_to_utf8

88 #define DECKLINK_FREE(s) CFRelease(s)

89 #define DECKLINK_BOOL bool

90 #else

91 #define DECKLINK_STR const char *

92 #define DECKLINK_STRDUP av_strdup

93 /* free() is needed for a string returned by the DeckLink SDL. */

94 #define DECKLINK_FREE(s) free((void *) s)

95 #define DECKLINK_BOOL bool

96 #endif

98 HRESULT ff_decklink_get_display_name(IDeckLink *This, const char **displayName)

99 {

100 DECKLINK_STR tmpDisplayName;

101 HRESULT hr = This->GetDisplayName(&tmpDisplayName);

102 if (hr != S_OK)

103 return hr;

104 *displayName = DECKLINK_STRDUP(tmpDisplayName);

105 DECKLINK_FREE(tmpDisplayName);

106 return hr;

107 }

108

109 static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id)

110 {

111 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

112 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

113 BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;

114 int64_t bmd_input = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;

115 const char *type_name = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";

116 int64_t supported_connections = 0;

117 HRESULT res;

118

119 if (bmd_input) {

120 res = ctx->attr->GetInt(attr_id, &supported_connections);

121 if (res != S_OK) {

122 av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);

123 return AVERROR_EXTERNAL;

124 }

125 if ((supported_connections & bmd_input) != bmd_input) {

126 av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);

127 return AVERROR(ENOSYS);

128 }

129 res = ctx->cfg->SetInt(cfg_id, bmd_input);

130 if (res != S_OK) {

131 av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);

132 return AVERROR_EXTERNAL;

133 }

134 }

135 return 0;

136 }

137

138 static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)

139 {

140 if (field_order == AV_FIELD_UNKNOWN)

141 return true;

142 if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)

143 return true;

144 if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)

145 return true;

146 if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))

147 return true;

148 return false;

149 }

150

151 int ff_decklink_set_format(AVFormatContext *avctx,

152 int width, int height,

153 int tb_num, int tb_den,

154 enum AVFieldOrder field_order,

155 decklink_direction_t direction, int num)

156 {

157 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

158 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

159 BMDDisplayModeSupport support;

160 IDeckLinkDisplayModeIterator *itermode;

161 IDeckLinkDisplayMode *mode;

162 int i = 1;

163 HRESULT res;

164

165 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",

166 width, height, tb_num, tb_den, field_order, direction, num, (cctx->format_code) ? cctx->format_code : "(unset)");

167

168 if (ctx->duplex_mode) {

169 DECKLINK_BOOL duplex_supported = false;

170

171 if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)

172 duplex_supported = false;

173

174 if (duplex_supported) {

175 res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);

176 if (res != S_OK)

177 av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");

178 else

179 av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");

180 } else {

181 av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");

182 }

183 }

184

185 if (direction == DIRECTION_IN) {

186 int ret;

187 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);

188 if (ret < 0)

189 return ret;

190 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);

191 if (ret < 0)

192 return ret;

193 res = ctx->dli->GetDisplayModeIterator (&itermode);

194 } else {

195 res = ctx->dlo->GetDisplayModeIterator (&itermode);

196 }

197

198 if (res!= S_OK) {

199 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");

200 return AVERROR(EIO);

201 }

202

203 char format_buf[] = " ";

204 if (cctx->format_code)

205 memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));

206 BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);

207 AVRational target_tb = av_make_q(tb_num, tb_den);

208 ctx->bmd_mode = bmdModeUnknown;

209 while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {

210 BMDTimeValue bmd_tb_num, bmd_tb_den;

211 int bmd_width = mode->GetWidth();

212 int bmd_height = mode->GetHeight();

213 BMDDisplayMode bmd_mode = mode->GetDisplayMode();

214 BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();

215

216 mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);

217 AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);

218

219 if ((bmd_width == width &&

220 bmd_height == height &&

221 !av_cmp_q(mode_tb, target_tb) &&

222 field_order_eq(field_order, bmd_field_dominance))

223 || i == num

224 || target_mode == bmd_mode) {

225 ctx->bmd_mode = bmd_mode;

226 ctx->bmd_width = bmd_width;

227 ctx->bmd_height = bmd_height;

228 ctx->bmd_tb_den = bmd_tb_den;

229 ctx->bmd_tb_num = bmd_tb_num;

230 ctx->bmd_field_dominance = bmd_field_dominance;

231 av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",

232 bmd_width, bmd_height, 1/av_q2d(mode_tb),

233 (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");

234 }

235

236 mode->Release();

237 i++;

238 }

239

240 itermode->Release();

241

242 if (ctx->bmd_mode == bmdModeUnknown)

243 return -1;

244 if (direction == DIRECTION_IN) {

245 if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,

246 bmdVideoOutputFlagDefault,

247 &support, NULL) != S_OK)

248 return -1;

249 } else {

250 if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,

251 bmdVideoOutputFlagDefault,

252 &support, NULL) != S_OK)

253 return -1;

254 }

255 if (support == bmdDisplayModeSupported)

256 return 0;

257

258 return -1;

259 }

260

261 int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {

262 return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction, num);

263 }

264

265 int ff_decklink_list_devices(AVFormatContext *avctx,

266 struct AVDeviceInfoList *device_list,

267 int show_inputs, int show_outputs)

268 {

269 IDeckLink *dl = NULL;

270 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();

271 int ret = 0;

272

273 if (!iter) {

274 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");

275 return AVERROR(EIO);

276 }

277

278 while (ret == 0 && iter->Next(&dl) == S_OK) {

279 IDeckLinkOutput *output_config;

280 IDeckLinkInput *input_config;

281 const char *displayName;

282 AVDeviceInfo *new_device = NULL;

283 int add = 0;

284

285 ff_decklink_get_display_name(dl, &displayName);

286

287 if (show_outputs) {

288 if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {

289 output_config->Release();

290 add = 1;

291 }

292 }

293

294 if (show_inputs) {

295 if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {

296 input_config->Release();

297 add = 1;

298 }

299 }

300

301 if (add == 1) {

302 new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));

303 if (!new_device) {

304 ret = AVERROR(ENOMEM);

305 goto next;

306 }

307 new_device->device_name = av_strdup(displayName);

308 if (!new_device->device_name) {

309 ret = AVERROR(ENOMEM);

310 goto next;

311 }

312

313 new_device->device_description = av_strdup(displayName);

314 if (!new_device->device_description) {

315 av_freep(&new_device->device_name);

316 ret = AVERROR(ENOMEM);

317 goto next;

318 }

319

320 if ((ret = av_dynarray_add_nofree(&device_list->devices,

321 &device_list->nb_devices, new_device)) < 0) {

322 av_freep(&new_device->device_name);

323 av_freep(&new_device->device_description);

324 av_freep(&new_device);

325 goto next;

326 }

327 }

328

329 next:

330 av_freep(&displayName);

331 dl->Release();

332 }

333 iter->Release();

334 return ret;

335 }

336

337 /* This is a wrapper around the ff_decklink_list_devices() which dumps the

338 output to av_log() and exits (for backward compatibility with the

339 "-list_devices" argument). */

340 void ff_decklink_list_devices_legacy(AVFormatContext *avctx,

341 int show_inputs, int show_outputs)

342 {

343 struct AVDeviceInfoList *device_list = NULL;

344 int ret;

345

346 device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));

347 if (!device_list)

348 return;

349

350 ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);

351 if (ret == 0) {

352 av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",

353 show_inputs ? "input" : "output");

354 for (int i = 0; i < device_list->nb_devices; i++) {

355 av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_name);

356 }

357 }

358 avdevice_free_list_devices(&device_list);

359 }

360

361 int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)

362 {

363 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

364 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

365 IDeckLinkDisplayModeIterator *itermode;

366 IDeckLinkDisplayMode *mode;

367 uint32_t format_code;

368 HRESULT res;

369

370 if (direction == DIRECTION_IN) {

371 int ret;

372 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);

373 if (ret < 0)

374 return ret;

375 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);

376 if (ret < 0)

377 return ret;

378 res = ctx->dli->GetDisplayModeIterator (&itermode);

379 } else {

380 res = ctx->dlo->GetDisplayModeIterator (&itermode);

381 }

382

383 if (res!= S_OK) {

384 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");

385 return AVERROR(EIO);

386 }

387

388 av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",

389 avctx->filename);

390 while (itermode->Next(&mode) == S_OK) {

391 BMDTimeValue tb_num, tb_den;

392 mode->GetFrameRate(&tb_num, &tb_den);

393 format_code = av_bswap32(mode->GetDisplayMode());

394 av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",

395 (char*) &format_code, mode->GetWidth(), mode->GetHeight(),

396 (int) tb_den, (int) tb_num);

397 switch (mode->GetFieldDominance()) {

398 case bmdLowerFieldFirst:

399 av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;

400 case bmdUpperFieldFirst:

401 av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;

402 }

403 mode->Release();

404 }

405 av_log(avctx, AV_LOG_INFO, "\n");

406

407 itermode->Release();

408

409 return 0;

410 }

411

412 void ff_decklink_cleanup(AVFormatContext *avctx)

413 {

414 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

415 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

416

417 if (ctx->dli)

418 ctx->dli->Release();

419 if (ctx->dlo)

420 ctx->dlo->Release();

421 if (ctx->attr)

422 ctx->attr->Release();

423 if (ctx->cfg)

424 ctx->cfg->Release();

425 if (ctx->dl)

426 ctx->dl->Release();

427 }

428

429 int ff_decklink_init_device(AVFormatContext *avctx, const char* name)

430 {

431 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

432 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

433 IDeckLink *dl = NULL;

434 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();

435 if (!iter) {

436 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");

437 return AVERROR_EXTERNAL;

438 }

439

440 while (iter->Next(&dl) == S_OK) {

441 const char *displayName;

442 ff_decklink_get_display_name(dl, &displayName);

443 if (!strcmp(name, displayName)) {

444 av_free((void *)displayName);

445 ctx->dl = dl;

446 break;

447 }

448 av_free((void *)displayName);

449 dl->Release();

450 }

451 iter->Release();

452 if (!ctx->dl)

453 return AVERROR(ENXIO);

454

455 if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {

456 av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);

457 ff_decklink_cleanup(avctx);

458 return AVERROR_EXTERNAL;

459 }

460

461 if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {

462 av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);

463 ff_decklink_cleanup(avctx);

464 return AVERROR_EXTERNAL;

465 }

466

467 return 0;

468 }

NULL

#define NULL

Definition: coverity.c:32

AVDeviceInfo

Structure describes basic parameters of the device.

Definition: avdevice.h:452

const char * s

Definition: avisynth_c.h:768

decklink_cctx::ctx

void * ctx

Definition: decklink_common_c.h:36

S_OK

#define S_OK

Definition: windows2linux.h:40

DECKLINK_STRDUP

#define DECKLINK_STRDUP

Definition: decklink_common.cpp:92

AVDeviceInfo::device_description

char * device_description

human friendly name

Definition: avdevice.h:454

imgutils.h

misc image utilities

AV_LOG_WARNING

#define AV_LOG_WARNING

Something somehow does not look correct.

Definition: log.h:182

AVDeviceInfo::device_name

char * device_name

device name, format depends on device

Definition: avdevice.h:453

ff_decklink_init_device

int ff_decklink_init_device(AVFormatContext *avctx, const char *name)

Definition: decklink_common.cpp:429

av_mallocz

void * av_mallocz(size_t size)

Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...

Definition: mem.c:222

DECKLINK_BOOL

#define DECKLINK_BOOL

Definition: decklink_common.cpp:95

AVFormatContext

Format I/O context.

Definition: avformat.h:1349

field_order_eq

static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)

Definition: decklink_common.cpp:138

DIRECTION_IN

Definition: decklink_common.h:102

av_malloc

#define av_malloc(s)

Definition: tableprint_vlc.h:31

avdevice_free_list_devices

void avdevice_free_list_devices(AVDeviceInfoList **device_list)

Convenient function to free result of avdevice_list_devices().

Definition: avdevice.c:250

decklink_cctx

Definition: decklink_common_c.h:33

AV_RB32

uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32

Definition: bytestream.h:87

ff_decklink_list_devices_legacy

void ff_decklink_list_devices_legacy(AVFormatContext *avctx, int show_inputs, int show_outputs)

Definition: decklink_common.cpp:340

height

#define height

ff_decklink_set_format

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, int num)

Definition: decklink_common.cpp:151

av_q2d

static double av_q2d(AVRational a)

Convert an AVRational to a double.

Definition: rational.h:104

AV_LOG_VERBOSE

#define AV_LOG_VERBOSE

Detailed information.

Definition: log.h:192

av_dynarray_add_nofree

int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)

Add an element to a dynamic array.