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)
74 #define DECKLINK_STR const char *
75 #define DECKLINK_STRDUP av_strdup
76 /* free() is needed for a string returned by the DeckLink SDL. */
77 #define DECKLINK_FREE(s) free((void *) s)
80 HRESULT
ff_decklink_get_display_name(IDeckLink
*This
, const char **displayName
)
82 DECKLINK_STR tmpDisplayName
;
83 HRESULT hr
= This
->GetDisplayName(&tmpDisplayName
);
86 *displayName
= DECKLINK_STRDUP(tmpDisplayName
);
87 DECKLINK_FREE(tmpDisplayName
);
91 int ff_decklink_set_format(AVFormatContext
*avctx
,
92 int width
, int height
,
93 int tb_num
, int tb_den
,
94 decklink_direction_t direction
, int num
)
96 struct decklink_cctx
*cctx
= (struct decklink_cctx
*) avctx
->priv_data
;
97 struct decklink_ctx
*ctx
= (struct decklink_ctx
*)cctx
->ctx
;
98 BMDDisplayModeSupport support
;
99 IDeckLinkDisplayModeIterator
*itermode
;
100 IDeckLinkDisplayMode
*mode
;
104 if (direction
== DIRECTION_IN
) {
105 res
= ctx
->dli
->GetDisplayModeIterator (&itermode
);
107 res
= ctx
->dlo
->GetDisplayModeIterator (&itermode
);
111 av_log(avctx
, AV_LOG_ERROR
, "Could not get Display Mode Iterator\n");
120 ctx
->bmd_mode
= bmdModeUnknown
;
121 while ((ctx
->bmd_mode
== bmdModeUnknown
) && itermode
->Next(&mode
) == S_OK
) {
122 BMDTimeValue bmd_tb_num
, bmd_tb_den
;
123 int bmd_width
= mode
->GetWidth();
124 int bmd_height
= mode
->GetHeight();
126 mode
->GetFrameRate(&bmd_tb_num
, &bmd_tb_den
);
128 if ((bmd_width
== width
&& bmd_height
== height
&&
129 bmd_tb_num
== tb_num
&& bmd_tb_den
== tb_den
) || i
== num
) {
130 ctx
->bmd_mode
= mode
->GetDisplayMode();
131 ctx
->bmd_width
= bmd_width
;
132 ctx
->bmd_height
= bmd_height
;
133 ctx
->bmd_tb_den
= bmd_tb_den
;
134 ctx
->bmd_tb_num
= bmd_tb_num
;
135 ctx
->bmd_field_dominance
= mode
->GetFieldDominance();
136 av_log(avctx
, AV_LOG_INFO
, "Found Decklink mode %d x %d with rate %.2f%s\n",
137 bmd_width
, bmd_height
, (float)bmd_tb_den
/(float)bmd_tb_num
,
138 (ctx
->bmd_field_dominance
==bmdLowerFieldFirst
|| ctx
->bmd_field_dominance
==bmdUpperFieldFirst
)?"(i)":"");
147 if (ctx
->bmd_mode
== bmdModeUnknown
)
149 if (direction
== DIRECTION_IN
) {
150 if (ctx
->dli
->DoesSupportVideoMode(ctx
->bmd_mode
, bmdFormat8BitYUV
,
151 bmdVideoOutputFlagDefault
,
152 &support
, NULL
) != S_OK
)
155 if (ctx
->dlo
->DoesSupportVideoMode(ctx
->bmd_mode
, bmdFormat8BitYUV
,
156 bmdVideoOutputFlagDefault
,
157 &support
, NULL
) != S_OK
)
160 if (support
== bmdDisplayModeSupported
)
166 int ff_decklink_set_format(AVFormatContext
*avctx
, decklink_direction_t direction
, int num
) {
167 return ff_decklink_set_format(avctx
, 0, 0, 0, 0, direction
, num
);
170 int ff_decklink_list_devices(AVFormatContext
*avctx
)
172 IDeckLink
*dl
= NULL
;
173 IDeckLinkIterator
*iter
= CreateDeckLinkIteratorInstance();
175 av_log(avctx
, AV_LOG_ERROR
, "Could not create DeckLink iterator\n");
178 av_log(avctx
, AV_LOG_INFO
, "Blackmagic DeckLink devices:\n");
179 while (iter
->Next(&dl
) == S_OK
) {
180 const char *displayName
;
181 ff_decklink_get_display_name(dl
, &displayName
);
182 av_log(avctx
, AV_LOG_INFO
, "\t'%s'\n", displayName
);
183 av_free((void *) displayName
);
190 int ff_decklink_list_formats(AVFormatContext
*avctx
, decklink_direction_t direction
)
192 struct decklink_cctx
*cctx
= (struct decklink_cctx
*) avctx
->priv_data
;
193 struct decklink_ctx
*ctx
= (struct decklink_ctx
*)cctx
->ctx
;
194 IDeckLinkDisplayModeIterator
*itermode
;
195 IDeckLinkDisplayMode
*mode
;
199 if (direction
== DIRECTION_IN
) {
200 res
= ctx
->dli
->GetDisplayModeIterator (&itermode
);
202 res
= ctx
->dlo
->GetDisplayModeIterator (&itermode
);
206 av_log(avctx
, AV_LOG_ERROR
, "Could not get Display Mode Iterator\n");
210 av_log(avctx
, AV_LOG_INFO
, "Supported formats for '%s':\n",
212 while (itermode
->Next(&mode
) == S_OK
) {
213 BMDTimeValue tb_num
, tb_den
;
214 mode
->GetFrameRate(&tb_num
, &tb_den
);
215 av_log(avctx
, AV_LOG_INFO
, "\t%d\t%ldx%ld at %d/%d fps",
216 ++i
,mode
->GetWidth(), mode
->GetHeight(),
217 (int) tb_den
, (int) tb_num
);
218 switch (mode
->GetFieldDominance()) {
219 case bmdLowerFieldFirst
:
220 av_log(avctx
, AV_LOG_INFO
, " (interlaced, lower field first)"); break;
221 case bmdUpperFieldFirst
:
222 av_log(avctx
, AV_LOG_INFO
, " (interlaced, upper field first)"); break;
224 av_log(avctx
, AV_LOG_INFO
, "\n");