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https://github.com/mpv-player/mpv
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758f8f7bd4
This is a simplification, because it lets us use the AVPacket functions, instead of handling the details manually. It also allows the libavcodec rawvideo decoder to use reference counting, so it doesn't have to memcpy() the full image data. The change in av_common.c enables this. This change is somewhat risky, because we rely on the following AVPacket implementation details and assumptions: - av_packet_ref() doesn't access the input padding, and just copies the data. By the API, AVPacket is always padded, and we violate this. The lavc implementation would have to go out of its way to make this a real problem, though. - We hope that the way we make the AVPacket refcountable in av_common.c is actually supported API-usage. It's hard to tell whether it is. Of course we still use our own "old" demux_packet struct, just so that libav* API usage is somewhat isolated.
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/*
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* This file is part of mplayer2.
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*
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* mplayer2 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mplayer2 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mplayer2; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPLAYER_DEMUX_PACKET_H
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#define MPLAYER_DEMUX_PACKET_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <inttypes.h>
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// Holds one packet/frame/whatever
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typedef struct demux_packet {
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int len;
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double pts;
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double dts;
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double duration;
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int64_t pos; // position in source file byte stream
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unsigned char *buffer;
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bool keyframe;
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int stream; // source stream index
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struct demux_packet *next;
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struct AVPacket *avpacket; // keep the buffer allocation
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} demux_packet_t;
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struct demux_packet *new_demux_packet(size_t len);
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struct demux_packet *new_demux_packet_from_avpacket(struct AVPacket *avpkt);
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struct demux_packet *new_demux_packet_from(void *data, size_t len);
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void demux_packet_shorten(struct demux_packet *dp, size_t len);
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void free_demux_packet(struct demux_packet *dp);
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struct demux_packet *demux_copy_packet(struct demux_packet *dp);
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#endif /* MPLAYER_DEMUX_PACKET_H */
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