mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.8 KiB
59 lines
1.8 KiB
/* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "internal.h" |
|
#include "libavutil/opt.h" |
|
#include "libavformat/avformat.h" |
|
|
|
int ff_alloc_input_device_context(AVFormatContext **avctx, AVInputFormat *iformat, const char *format) |
|
{ |
|
AVFormatContext *s; |
|
int ret = 0; |
|
|
|
*avctx = NULL; |
|
if (!iformat && !format) |
|
return AVERROR(EINVAL); |
|
if (!(s = avformat_alloc_context())) |
|
return AVERROR(ENOMEM); |
|
|
|
if (!iformat) |
|
iformat = av_find_input_format(format); |
|
if (!iformat || !iformat->priv_class || !AV_IS_INPUT_DEVICE(iformat->priv_class->category)) { |
|
ret = AVERROR(EINVAL); |
|
goto error; |
|
} |
|
s->iformat = iformat; |
|
if (s->iformat->priv_data_size > 0) { |
|
s->priv_data = av_mallocz(s->iformat->priv_data_size); |
|
if (!s->priv_data) { |
|
ret = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
if (s->iformat->priv_class) { |
|
*(const AVClass**)s->priv_data= s->iformat->priv_class; |
|
av_opt_set_defaults(s->priv_data); |
|
} |
|
} else |
|
s->priv_data = NULL; |
|
|
|
*avctx = s; |
|
return 0; |
|
error: |
|
avformat_free_context(s); |
|
return ret; |
|
}
|
|
|