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");