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64 lines
2.3 KiB
64 lines
2.3 KiB
/* |
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* |
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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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#ifndef AVFORMAT_AVIO_INTERNAL_H |
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#define AVFORMAT_AVIO_INTERNAL_H |
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#include "avio.h" |
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int ffio_init_context(AVIOContext *s, |
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unsigned char *buffer, |
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int buffer_size, |
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int write_flag, |
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void *opaque, |
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int (*read_packet)(void *opaque, uint8_t *buf, int buf_size), |
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int (*write_packet)(void *opaque, uint8_t *buf, int buf_size), |
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int64_t (*seek)(void *opaque, int64_t offset, int whence)); |
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/** |
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* Read size bytes from AVIOContext into buf. |
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* This reads at most 1 packet. If that is not enough fewer bytes will be |
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* returned. |
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* @return number of bytes read or AVERROR |
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*/ |
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int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size); |
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void ffio_fill(AVIOContext *s, int b, int count); |
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static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s) |
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{ |
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avio_wl32(pb, MKTAG(s[0], s[1], s[2], s[3])); |
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} |
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/** |
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* Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file. |
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* Used after probing to avoid seeking. |
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* Joins buf and s->buffer, taking any overlap into consideration. |
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* @note s->buffer must overlap with buf or they can't be joined and the function fails |
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* |
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* @param s The read-only AVIOContext to rewind |
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* @param buf The probe buffer containing the first buf_size bytes of the file |
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* @param buf_size The size of buf |
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* @return 0 in case of success, a negative value corresponding to an |
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* AVERROR code in case of failure |
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*/ |
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int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size); |
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#endif // AVFORMAT_AVIO_INTERNAL_H
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