FFmpeg  4.0
decklink_enc_c.c
Go to the documentation of this file.
1 /*
2  * Blackmagic DeckLink output
3  * Copyright (c) 2013-2014 Ramiro Polla
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 
22 #include "libavformat/avformat.h"
23 #include "libavutil/opt.h"
24 
25 #include "decklink_common_c.h"
26 #include "decklink_enc.h"
27 
28 #define OFFSET(x) offsetof(struct decklink_cctx, x)
29 #define ENC AV_OPT_FLAG_ENCODING_PARAM
30 static const AVOption options[] = {
31  { "list_devices", "list available devices" , OFFSET(list_devices), AV_OPT_TYPE_INT , { .i64 = 0 }, 0, 1, ENC },
32  { "list_formats", "list supported formats" , OFFSET(list_formats), AV_OPT_TYPE_INT , { .i64 = 0 }, 0, 1, ENC },
33  { "preroll" , "video preroll in seconds", OFFSET(preroll ), AV_OPT_TYPE_DOUBLE, { .dbl = 0.5 }, 0, 5, ENC },
34  { NULL },
35 };
36 
37 static const AVClass decklink_muxer_class = {
38  .class_name = "Blackmagic DeckLink muxer",
39  .item_name = av_default_item_name,
40  .option = options,
41  .version = LIBAVUTIL_VERSION_INT,
43 };
44 
46  .name = "decklink",
47  .long_name = NULL_IF_CONFIG_SMALL("Blackmagic DeckLink output"),
48  .audio_codec = AV_CODEC_ID_PCM_S16LE,
49  .video_codec = AV_CODEC_ID_WRAPPED_AVFRAME,
50  .subtitle_codec = AV_CODEC_ID_NONE,
51  .flags = AVFMT_NOFILE,
52  .get_device_list = ff_decklink_list_output_devices,
53  .priv_class = &decklink_muxer_class,
54  .priv_data_size = sizeof(struct decklink_cctx),
55  .write_header = ff_decklink_write_header,
56  .write_packet = ff_decklink_write_packet,
57  .write_trailer = ff_decklink_write_trailer,
58 };
#define NULL
Definition: coverity.c:32
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
static void list_formats(AVFormatContext *ctx, int type)
Definition: v4l2.c:271
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
AVOptions.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * name
Definition: avformat.h:507
Passthrough codec, AVFrames wrapped in AVPacket.
Definition: avcodec.h:691
Describe the class of an AVClass context structure.
Definition: log.h:67
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465