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 #elif defined(__APPLE__)
74 static char *dup_cfstring_to_utf8(CFStringRef w)
77 CFStringGetCString(w, s, 255, kCFStringEncodingUTF8);
80 #define DECKLINK_STR const __CFString *
81 #define DECKLINK_STRDUP dup_cfstring_to_utf8
82 #define DECKLINK_FREE(s) free((void *) s)
84 #define DECKLINK_STR const char *
85 #define DECKLINK_STRDUP av_strdup
86 /* free() is needed for a string returned by the DeckLink SDL. */
87 #define DECKLINK_FREE(s) free((void *) s)
90 HRESULT ff_decklink_get_display_name(IDeckLink *This, const char **displayName)
92 DECKLINK_STR tmpDisplayName;
93 HRESULT hr = This->GetDisplayName(&tmpDisplayName);
96 *displayName = DECKLINK_STRDUP(tmpDisplayName);
97 DECKLINK_FREE(tmpDisplayName);
101 int ff_decklink_set_format(AVFormatContext *avctx,
102 int width, int height,
103 int tb_num, int tb_den,
104 decklink_direction_t direction, int num)
106 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
107 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
108 BMDDisplayModeSupport support;
109 IDeckLinkDisplayModeIterator *itermode;
110 IDeckLinkDisplayMode *mode;
114 if (direction == DIRECTION_IN) {
115 res = ctx->dli->GetDisplayModeIterator (&itermode);
117 res = ctx->dlo->GetDisplayModeIterator (&itermode);
121 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
130 ctx->bmd_mode = bmdModeUnknown;
131 while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
132 BMDTimeValue bmd_tb_num, bmd_tb_den;
133 int bmd_width = mode->GetWidth();
134 int bmd_height = mode->GetHeight();
136 mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
138 if ((bmd_width == width && bmd_height == height &&
139 bmd_tb_num == tb_num && bmd_tb_den == tb_den) || i == num) {
140 ctx->bmd_mode = mode->GetDisplayMode();
141 ctx->bmd_width = bmd_width;
142 ctx->bmd_height = bmd_height;
143 ctx->bmd_tb_den = bmd_tb_den;
144 ctx->bmd_tb_num = bmd_tb_num;
145 ctx->bmd_field_dominance = mode->GetFieldDominance();
146 av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
147 bmd_width, bmd_height, (float)bmd_tb_den/(float)bmd_tb_num,
148 (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
157 if (ctx->bmd_mode == bmdModeUnknown)
159 if (direction == DIRECTION_IN) {
160 if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
161 bmdVideoOutputFlagDefault,
162 &support, NULL) != S_OK)
165 if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
166 bmdVideoOutputFlagDefault,
167 &support, NULL) != S_OK)
170 if (support == bmdDisplayModeSupported)
176 int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
177 return ff_decklink_set_format(avctx, 0, 0, 0, 0, direction, num);
180 int ff_decklink_list_devices(AVFormatContext *avctx)
182 IDeckLink *dl = NULL;
183 IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
185 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
188 av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink devices:\n");
189 while (iter->Next(&dl) == S_OK) {
190 const char *displayName;
191 ff_decklink_get_display_name(dl, &displayName);
192 av_log(avctx, AV_LOG_INFO, "\t'%s'\n", displayName);
193 av_free((void *) displayName);
200 int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
202 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
203 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
204 IDeckLinkDisplayModeIterator *itermode;
205 IDeckLinkDisplayMode *mode;
209 if (direction == DIRECTION_IN) {
210 res = ctx->dli->GetDisplayModeIterator (&itermode);
212 res = ctx->dlo->GetDisplayModeIterator (&itermode);
216 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
220 av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
222 while (itermode->Next(&mode) == S_OK) {
223 BMDTimeValue tb_num, tb_den;
224 mode->GetFrameRate(&tb_num, &tb_den);
225 av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
226 ++i,mode->GetWidth(), mode->GetHeight(),
227 (int) tb_den, (int) tb_num);
228 switch (mode->GetFieldDominance()) {
229 case bmdLowerFieldFirst:
230 av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
231 case bmdUpperFieldFirst:
232 av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
234 av_log(avctx, AV_LOG_INFO, "\n");