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 int ff_decklink_set_format(AVFormatContext *avctx,
134 int width, int height,
135 int tb_num, int tb_den,
136 decklink_direction_t direction, int num)
138 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
139 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
140 BMDDisplayModeSupport support;
141 IDeckLinkDisplayModeIterator *itermode;
142 IDeckLinkDisplayMode *mode;
146 av_log(avctx, AV_LOG_DEBUG, "Trying to find mode for frame size %dx%d, frame timing %d/%d, direction %d, mode number %d\n",
147 width, height, tb_num, tb_den, direction, num);
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");
166 if (direction == DIRECTION_IN) {
168 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
171 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
174 res = ctx->dli->GetDisplayModeIterator (&itermode);
176 res = ctx->dlo->GetDisplayModeIterator (&itermode);
180 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
184 AVRational target_tb = av_make_q(tb_num, tb_den);
185 ctx->bmd_mode = bmdModeUnknown;
186 while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
187 BMDTimeValue bmd_tb_num, bmd_tb_den;
188 int bmd_width = mode->GetWidth();
189 int bmd_height = mode->GetHeight();
191 mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
192 AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
194 if ((bmd_width == width && bmd_height == height &&
195 !av_cmp_q(mode_tb, target_tb)) || i == num) {
196 ctx->bmd_mode = mode->GetDisplayMode();
197 ctx->bmd_width = bmd_width;
198 ctx->bmd_height = bmd_height;
199 ctx->bmd_tb_den = bmd_tb_den;
200 ctx->bmd_tb_num = bmd_tb_num;
201 ctx->bmd_field_dominance = mode->GetFieldDominance();
202 av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
203 bmd_width, bmd_height, 1/av_q2d(mode_tb),
204 (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
213 if (ctx->bmd_mode == bmdModeUnknown)
215 if (direction == DIRECTION_IN) {
216 if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
217 bmdVideoOutputFlagDefault,
218 &support, NULL) != S_OK)
221 if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
222 bmdVideoOutputFlagDefault,
223 &support, NULL) != S_OK)
226 if (support == bmdDisplayModeSupported)
232 int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
233 return ff_decklink_set_format(avctx, 0, 0, 0, 0, direction, num);
236 int ff_decklink_list_devices(AVFormatContext *avctx)
238 IDeckLink *dl = NULL;
239 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
241 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
244 av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink devices:\n");
245 while (iter->Next(&dl) == S_OK) {
246 const char *displayName;
247 ff_decklink_get_display_name(dl, &displayName);
248 av_log(avctx, AV_LOG_INFO, "\t'%s'\n", displayName);
249 av_free((void *) displayName);
256 int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
258 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
259 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
260 IDeckLinkDisplayModeIterator *itermode;
261 IDeckLinkDisplayMode *mode;
265 if (direction == DIRECTION_IN) {
267 ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
270 ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
273 res = ctx->dli->GetDisplayModeIterator (&itermode);
275 res = ctx->dlo->GetDisplayModeIterator (&itermode);
279 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
283 av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
285 while (itermode->Next(&mode) == S_OK) {
286 BMDTimeValue tb_num, tb_den;
287 mode->GetFrameRate(&tb_num, &tb_den);
288 av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
289 ++i,mode->GetWidth(), mode->GetHeight(),
290 (int) tb_den, (int) tb_num);
291 switch (mode->GetFieldDominance()) {
292 case bmdLowerFieldFirst:
293 av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
294 case bmdUpperFieldFirst:
295 av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
297 av_log(avctx, AV_LOG_INFO, "\n");
306 void ff_decklink_cleanup(AVFormatContext *avctx)
308 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
309 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
316 ctx->attr->Release();
323 int ff_decklink_init_device(AVFormatContext *avctx, const char* name)
325 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
326 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
327 IDeckLink *dl = NULL;
328 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
330 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
331 return AVERROR_EXTERNAL;
334 while (iter->Next(&dl) == S_OK) {
335 const char *displayName;
336 ff_decklink_get_display_name(dl, &displayName);
337 if (!strcmp(name, displayName)) {
338 av_free((void *)displayName);
342 av_free((void *)displayName);
347 return AVERROR(ENXIO);
349 if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
350 av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
351 ff_decklink_cleanup(avctx);
352 return AVERROR_EXTERNAL;
355 if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
356 av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
357 ff_decklink_cleanup(avctx);
358 return AVERROR_EXTERNAL;