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) != S_OK) {
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
73 #define DECKLINK_STR const char *
74 #define DECKLINK_STRDUP av_strdup
77 HRESULT ff_decklink_get_display_name(IDeckLink *This, const char **displayName)
79 DECKLINK_STR tmpDisplayName;
80 HRESULT hr = This->GetDisplayName(&tmpDisplayName);
83 *displayName = DECKLINK_STRDUP(tmpDisplayName);
84 /* free() is needed for a string returned by the DeckLink SDL. */
85 free((void *) tmpDisplayName);
89 int ff_decklink_set_format(AVFormatContext *avctx,
90 int width, int height,
91 int tb_num, int tb_den,
92 decklink_direction_t direction, int num)
94 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
95 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
96 BMDDisplayModeSupport support;
97 IDeckLinkDisplayModeIterator *itermode;
98 IDeckLinkDisplayMode *mode;
102 if (direction == DIRECTION_IN) {
103 res = ctx->dli->GetDisplayModeIterator (&itermode);
105 res = ctx->dlo->GetDisplayModeIterator (&itermode);
109 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
118 ctx->bmd_mode = bmdModeUnknown;
119 while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
120 BMDTimeValue bmd_tb_num, bmd_tb_den;
121 int bmd_width = mode->GetWidth();
122 int bmd_height = mode->GetHeight();
124 mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
126 if ((bmd_width == width && bmd_height == height &&
127 bmd_tb_num == tb_num && bmd_tb_den == tb_den) || i == num) {
128 ctx->bmd_mode = mode->GetDisplayMode();
129 ctx->bmd_width = bmd_width;
130 ctx->bmd_height = bmd_height;
131 ctx->bmd_tb_den = bmd_tb_den;
132 ctx->bmd_tb_num = bmd_tb_num;
133 ctx->bmd_field_dominance = mode->GetFieldDominance();
134 av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
135 bmd_width, bmd_height, (float)bmd_tb_den/(float)bmd_tb_num,
136 (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
145 if (ctx->bmd_mode == bmdModeUnknown)
147 if (direction == DIRECTION_IN) {
148 if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
149 bmdVideoOutputFlagDefault,
150 &support, NULL) != S_OK)
153 if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
154 bmdVideoOutputFlagDefault,
155 &support, NULL) != S_OK)
158 if (support == bmdDisplayModeSupported)
164 int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
165 return ff_decklink_set_format(avctx, 0, 0, 0, 0, direction, num);
168 int ff_decklink_list_devices(AVFormatContext *avctx)
170 IDeckLink *dl = NULL;
171 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
173 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
176 av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink devices:\n");
177 while (iter->Next(&dl) == S_OK) {
178 const char *displayName;
179 ff_decklink_get_display_name(dl, &displayName);
180 av_log(avctx, AV_LOG_INFO, "\t'%s'\n", displayName);
181 av_free((void *) displayName);
188 int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
190 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
191 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
192 IDeckLinkDisplayModeIterator *itermode;
193 IDeckLinkDisplayMode *mode;
197 if (direction == DIRECTION_IN) {
198 res = ctx->dli->GetDisplayModeIterator (&itermode);
200 res = ctx->dlo->GetDisplayModeIterator (&itermode);
204 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
208 av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
210 while (itermode->Next(&mode) == S_OK) {
211 BMDTimeValue tb_num, tb_den;
212 mode->GetFrameRate(&tb_num, &tb_den);
213 av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
214 ++i,mode->GetWidth(), mode->GetHeight(),
215 (int) tb_den, (int) tb_num);
216 switch (mode->GetFieldDominance()) {
217 case bmdLowerFieldFirst:
218 av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
219 case bmdUpperFieldFirst:
220 av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
222 av_log(avctx, AV_LOG_INFO, "\n");