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