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 <DeckLinkAPI.h>
24 #include <DeckLinkAPI_i.c>
26 #include <DeckLinkAPIDispatch.cpp>
30 #include <semaphore.h>
33 #include "libavformat/avformat.h"
34 #include "libavformat/internal.h"
35 #include "libavutil/imgutils.h"
38 #include "decklink_common.h"
41 IDeckLinkIterator *CreateDeckLinkIteratorInstance(void)
43 IDeckLinkIterator *iter;
45 if (CoInitialize(NULL) < 0) {
46 av_log(NULL, AV_LOG_ERROR, "COM initialization failed.\n");
50 if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
51 IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
52 av_log(NULL, AV_LOG_ERROR, "DeckLink drivers not installed.\n");
61 static char *dup_wchar_to_utf8(wchar_t *w)
64 int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
65 s = (char *) av_malloc(l);
67 WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
70 #define DECKLINK_STR OLECHAR *
71 #define DECKLINK_STRDUP dup_wchar_to_utf8
72 #define DECKLINK_FREE(s) SysFreeString(s)
73 #define DECKLINK_BOOL BOOL
74 #elif defined(__APPLE__)
75 static char *dup_cfstring_to_utf8(CFStringRef w)
78 CFStringGetCString(w, s, 255, kCFStringEncodingUTF8);
81 #define DECKLINK_STR const __CFString *
82 #define DECKLINK_STRDUP dup_cfstring_to_utf8
83 #define DECKLINK_FREE(s) free((void *) s)
84 #define DECKLINK_BOOL bool
86 #define DECKLINK_STR const char *
87 #define DECKLINK_STRDUP av_strdup
88 /* free() is needed for a string returned by the DeckLink SDL. */
89 #define DECKLINK_FREE(s) free((void *) s)
90 #define DECKLINK_BOOL bool
93 HRESULT ff_decklink_get_display_name(IDeckLink *This, const char **displayName)
95 DECKLINK_STR tmpDisplayName;
96 HRESULT hr = This->GetDisplayName(&tmpDisplayName);
99 *displayName = DECKLINK_STRDUP(tmpDisplayName);
100 DECKLINK_FREE(tmpDisplayName);
104 static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id)
106 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
107 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
108 BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;
109 int64_t bmd_input = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;
110 const char *type_name = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";
111 int64_t supported_connections = 0;
115 res = ctx->attr->GetInt(attr_id, &supported_connections);
117 av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);
118 return AVERROR_EXTERNAL;
120 if ((supported_connections & bmd_input) != bmd_input) {
121 av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);
122 return AVERROR(ENOSYS);
124 res = ctx->cfg->SetInt(cfg_id, bmd_input);
126 av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);
127 return AVERROR_EXTERNAL;
133 static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)
135 if (field_order == AV_FIELD_UNKNOWN)
137 if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)
139 if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)
141 if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))
146 int ff_decklink_set_format(AVFormatContext *avctx,
147 int width, int height,
148 int tb_num, int tb_den,
149 enum AVFieldOrder field_order,
150 decklink_direction_t direction, int num)
152 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
153 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
154 BMDDisplayModeSupport support;
155 IDeckLinkDisplayModeIterator *itermode;
156 IDeckLinkDisplayMode *mode;
160 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\n",
161 width, height, tb_num, tb_den, field_order, direction, num);
163 if (ctx->duplex_mode) {
164 DECKLINK_BOOL duplex_supported = false;
166 if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
167 duplex_supported = false;
169 if (duplex_supported) {
170 res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
172 av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");
174 av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");
176 av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");
180 if (direction == DIRECTION_IN) {
182 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
185 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
188 res = ctx->dli->GetDisplayModeIterator (&itermode);
190 res = ctx->dlo->GetDisplayModeIterator (&itermode);
194 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
198 AVRational target_tb = av_make_q(tb_num, tb_den);
199 ctx->bmd_mode = bmdModeUnknown;
200 while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
201 BMDTimeValue bmd_tb_num, bmd_tb_den;
202 int bmd_width = mode->GetWidth();
203 int bmd_height = mode->GetHeight();
204 BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();
206 mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
207 AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
209 if ((bmd_width == width &&
210 bmd_height == height &&
211 !av_cmp_q(mode_tb, target_tb) &&
212 field_order_eq(field_order, bmd_field_dominance)) || i == num) {
213 ctx->bmd_mode = mode->GetDisplayMode();
214 ctx->bmd_width = bmd_width;
215 ctx->bmd_height = bmd_height;
216 ctx->bmd_tb_den = bmd_tb_den;
217 ctx->bmd_tb_num = bmd_tb_num;
218 ctx->bmd_field_dominance = bmd_field_dominance;
219 av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
220 bmd_width, bmd_height, 1/av_q2d(mode_tb),
221 (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
230 if (ctx->bmd_mode == bmdModeUnknown)
232 if (direction == DIRECTION_IN) {
233 if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
234 bmdVideoOutputFlagDefault,
235 &support, NULL) != S_OK)
238 if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
239 bmdVideoOutputFlagDefault,
240 &support, NULL) != S_OK)
243 if (support == bmdDisplayModeSupported)
249 int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
250 return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction, num);
253 int ff_decklink_list_devices(AVFormatContext *avctx)
255 IDeckLink *dl = NULL;
256 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
258 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
261 av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink devices:\n");
262 while (iter->Next(&dl) == S_OK) {
263 const char *displayName;
264 ff_decklink_get_display_name(dl, &displayName);
265 av_log(avctx, AV_LOG_INFO, "\t'%s'\n", displayName);
266 av_free((void *) displayName);
273 int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
275 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
276 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
277 IDeckLinkDisplayModeIterator *itermode;
278 IDeckLinkDisplayMode *mode;
282 if (direction == DIRECTION_IN) {
284 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
287 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
290 res = ctx->dli->GetDisplayModeIterator (&itermode);
292 res = ctx->dlo->GetDisplayModeIterator (&itermode);
296 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
300 av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
302 while (itermode->Next(&mode) == S_OK) {
303 BMDTimeValue tb_num, tb_den;
304 mode->GetFrameRate(&tb_num, &tb_den);
305 av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
306 ++i,mode->GetWidth(), mode->GetHeight(),
307 (int) tb_den, (int) tb_num);
308 switch (mode->GetFieldDominance()) {
309 case bmdLowerFieldFirst:
310 av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
311 case bmdUpperFieldFirst:
312 av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
314 av_log(avctx, AV_LOG_INFO, "\n");
323 void ff_decklink_cleanup(AVFormatContext *avctx)
325 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
326 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
333 ctx->attr->Release();
340 int ff_decklink_init_device(AVFormatContext *avctx, const char* name)
342 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
343 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
344 IDeckLink *dl = NULL;
345 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
347 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
348 return AVERROR_EXTERNAL;
351 while (iter->Next(&dl) == S_OK) {
352 const char *displayName;
353 ff_decklink_get_display_name(dl, &displayName);
354 if (!strcmp(name, displayName)) {
355 av_free((void *)displayName);
359 av_free((void *)displayName);
364 return AVERROR(ENXIO);
366 if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
367 av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
368 ff_decklink_cleanup(avctx);
369 return AVERROR_EXTERNAL;
372 if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
373 av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
374 ff_decklink_cleanup(avctx);
375 return AVERROR_EXTERNAL;