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mpv/demux/packet.h

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core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
2011-08-20 17:25:43 +00:00
/*
Update license headers Signed-off-by: wm4 <wm4@nowhere>
2015-04-13 07:36:54 +00:00
* This file is part of mpv.
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
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*
Update license headers Signed-off-by: wm4 <wm4@nowhere>
2015-04-13 07:36:54 +00:00
* mpv is free software; you can redistribute it and/or modify
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
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* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
Update license headers Signed-off-by: wm4 <wm4@nowhere>
2015-04-13 07:36:54 +00:00
* mpv is distributed in the hope that it will be useful,
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
Update license headers Signed-off-by: wm4 <wm4@nowhere>
2015-04-13 07:36:54 +00:00
* with mpv. If not, see <http://www.gnu.org/licenses/>.
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
2011-08-20 17:25:43 +00:00
*/
#ifndef MPLAYER_DEMUX_PACKET_H
#define MPLAYER_DEMUX_PACKET_H
demux, vd_ffmpeg: fix demux keyframe flag, set AV_PKT_FLAG_KEY There was some confusion about the "flags" field in demuxer packets. Demuxers set it to either 1 or 0x10 to indicate a keyframe (and the field was not used to indicate anything else). This didn't cause visible problems because nothing read the value. Replace the "flags" field with a boolean "keyframe" field. Set AV_PKT_FLAG_KEY based on this field in packets fed to libavcodec video decoders (looks like PNG and ZeroCodec are the only ones which depend on values from demuxer; previously this was hardcoded to true for PNG). Make demux_mf set the keyframe field in every packet. This matters for PNG files now that the demuxer flag is forwarded to libavcodec. Fix logic setting the field in demux_mkv. It had probably not been updated when adding SimpleBlock support. This probably makes no difference for any current practical use.
2012-07-24 21:23:27 +00:00
#include <stdbool.h>
demux: move packet functions to a separate source file
2014-07-05 14:45:28 +00:00
#include <stddef.h>
demux: rename demux_packet.h to packet.h This always bothered me.
2013-11-18 17:46:44 +00:00
#include <inttypes.h>
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
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// Holds one packet/frame/whatever
typedef struct demux_packet {
int len;
packet: cosmetics: reorder fields
2016-02-15 19:39:17 +00:00
unsigned char *buffer;
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
2011-08-20 17:25:43 +00:00
double pts;
demux: export dts from demux_lavf, use it for avi Having the DTS directly can be useful for restoring PTS values. The avi file format doesn't actually store PTS values, just DTS. An older hack explicitly exported the DTS as PTS (ignoring the [I assume] genpts generated non-sense PTS), which is not necessary anymore due to this change.
2013-11-25 22:13:01 +00:00
double dts;
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
2011-08-20 17:25:43 +00:00
double duration;
demux, vd_ffmpeg: fix demux keyframe flag, set AV_PKT_FLAG_KEY There was some confusion about the "flags" field in demuxer packets. Demuxers set it to either 1 or 0x10 to indicate a keyframe (and the field was not used to indicate anything else). This didn't cause visible problems because nothing read the value. Replace the "flags" field with a boolean "keyframe" field. Set AV_PKT_FLAG_KEY based on this field in packets fed to libavcodec video decoders (looks like PNG and ZeroCodec are the only ones which depend on values from demuxer; previously this was hardcoded to true for PNG). Make demux_mf set the keyframe field in every packet. This matters for PNG files now that the demuxer flag is forwarded to libavcodec. Fix logic setting the field in demux_mkv. It had probably not been updated when adding SimpleBlock support. This probably makes no difference for any current practical use.
2012-07-24 21:23:27 +00:00
bool keyframe;
packet: cosmetics: reorder fields
2016-02-15 19:39:17 +00:00
int64_t pos; // position in source file byte stream
int stream; // source stream index
Rewrite ordered chapters and timeline stuff This uses a different method to piece segments together. The old approach basically changes to a new file (with a new start offset) any time a segment ends. This meant waiting for audio/video end on segment end, and then changing to the new segment all at once. It had a very weird impact on the playback core, and some things (like truly gapless segment transitions, or frame backstepping) just didn't work. The new approach adds the demux_timeline pseudo-demuxer, which presents an uniform packet stream from the many segments. This is pretty similar to how ordered chapters are implemented everywhere else. It also reminds of the FFmpeg concat pseudo-demuxer. The "pure" version of this approach doesn't work though. Segments can actually have different codec configurations (different extradata), and subtitles are most likely broken too. (Subtitles have multiple corner cases which break the pure stream-concatenation approach completely.) To counter this, we do two things: - Reinit the decoder with each segment. We go as far as allowing concatenating files with completely different codecs for the sake of EDL (which also uses the timeline infrastructure). A "lighter" approach would try to make use of decoder mechanism to update e.g. the extradata, but that seems fragile. - Clip decoded data to segment boundaries. This is equivalent to normal playback core mechanisms like hr-seek, but now the playback core doesn't need to care about these things. These two mechanisms are equivalent to what happened in the old implementation, except they don't happen in the playback core anymore. In other words, the playback core is completely relieved from timeline implementation details. (Which honestly is exactly what I'm trying to do here. I don't think ordered chapter behavior deserves improvement, even if it's bad - but I want to get it out from the playback core.) There is code duplication between audio and video decoder common code. This is awful and could be shareable - but this will happen later. Note that the audio path has some code to clip audio frames for the purpose of codec preroll/gapless handling, but it's not shared as sharing it would cause more pain than it would help.
2016-02-15 20:04:07 +00:00
// segmentation (ordered chapters, EDL)
struct mp_codec_params *codec;
double start, end;
bool new_segment;
packet: cosmetics: reorder fields
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// private
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
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struct demux_packet *next;
packet: cosmetics: reorder fields
2016-02-15 19:39:17 +00:00
struct AVPacket *avpacket; // keep the buffer allocation and sidedata
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
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} demux_packet_t;
demux: move packet functions to a separate source file
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struct demux_packet *new_demux_packet(size_t len);
demux: always use AVPacket 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.
2014-08-24 15:45:28 +00:00
struct demux_packet *new_demux_packet_from_avpacket(struct AVPacket *avpkt);
demux: move packet functions to a separate source file
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struct demux_packet *new_demux_packet_from(void *data, size_t len);
void demux_packet_shorten(struct demux_packet *dp, size_t len);
void free_demux_packet(struct demux_packet *dp);
struct demux_packet *demux_copy_packet(struct demux_packet *dp);
demux_mkv: refactor packet parsing Makes it somewhat more uniform, and breaks up the awfully deep nesting. This implicitly changes multiple small details, rather than only moving code around. In particular, this computes the packet fields first and parses them afterwards, which is needed for the next commit.
2015-02-05 20:52:07 +00:00
void demux_packet_copy_attribs(struct demux_packet *dst, struct demux_packet *src);
demux_mkv: implement audio skipping/trimming This mechanism was introduced for Opus, and allows correct skipping of "preroll" data, as well as discarding trailing audio if the file's length isn't a multiple of the audio frame size. Not sure how to handle seeking. I don't understand the purpose of the SeekPreRoll element. This was tested with correctness_trimming_nobeeps.opus, remuxed to mka with mkvmerge v7.2.0. It seems to be correct, although the reported file duration is incorrect (maybe a mkvmerge issue).
2014-11-03 19:00:34 +00:00
int demux_packet_set_padding(struct demux_packet *dp, int start, int end);
demux_mkv: passthrough BlockAdditions for libvpx alpha Dumb but simple thing. Requires the FFmpeg libvpx decoder wrapper, as its native decoder doesn't support alpha.
2017-01-31 13:48:10 +00:00
int demux_packet_add_blockadditional(struct demux_packet *dp, uint64_t id,
void *data, size_t size);
demux_mkv: implement audio skipping/trimming This mechanism was introduced for Opus, and allows correct skipping of "preroll" data, as well as discarding trailing audio if the file's length isn't a multiple of the audio frame size. Not sure how to handle seeking. I don't understand the purpose of the SeekPreRoll element. This was tested with correctness_trimming_nobeeps.opus, remuxed to mka with mkvmerge v7.2.0. It seems to be correct, although the reported file duration is incorrect (maybe a mkvmerge issue).
2014-11-03 19:00:34 +00:00
core, demux, vd_ffmpeg: pass side data from demux_lavf to vd_ffmpeg Pass the libavformat packet side_data field from demux_lavf to vd_ffmpeg. Libavcodec/libavformat use this field for palette data, and passing it is required for the playback of some paletted video codecs. The implementation works by giving vd_ffmpeg a copy of the struct demux_packet used to store the video packet (from which it can access the avpacket field). The definition of struct demux_packet is moved to new file demux_packet.h so that vd_ffmpeg.c can use it without including all of demuxer.h.
2011-08-20 17:25:43 +00:00
#endif /* MPLAYER_DEMUX_PACKET_H */