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avcodec, avformat: deprecate anything related to side data merging

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This patch deprecates anything that has to do with merging/splitting
side data. Automatic side data merging (and splitting), as well as all
API symbols involved in it, are removed completely.

Two FF_API_ defines are dedicated to deprecating API symbols related to
this: FF_API_MERGE_SD_API removes av_packet_split/merge_side_data in
libavcodec, and FF_API_LAVF_KEEPSIDE_FLAG deprecates
AVFMT_FLAG_KEEP_SIDE_DATA in libavformat.

Since it was claimed that changing the default from merging side data to
not doing it is an ABI change, there are two additional FF_API_ defines,
which stop using the side data merging/splitting by default (and remove
any code in avformat/avcodec doing this): FF_API_MERGE_SD in libavcodec,
and FF_API_LAVF_MERGE_SD in libavformat.

It is very much intended that FF_API_MERGE_SD and FF_API_LAVF_MERGE_SD
are quickly defined to 0 in the next ABI bump, while the API symbols are
retained for a longer time for the sake of compatibility.
AVFMT_FLAG_KEEP_SIDE_DATA will (very much intentionally) do nothing for
most of the time it will still be defined. Keep in mind that no code
exists that actually tries to unset this flag for any reason, nor does
such code need to exist. Code setting this flag explicitly will work as
before. Thus it's ok for AVFMT_FLAG_KEEP_SIDE_DATA to do nothing once
side data merging has been removed from libavformat.

In order to avoid that anyone in the future does this incorrectly, here
is a small guide how to update the internal code on bumps:

- next ABI bump (probably soon):
  - define FF_API_LAVF_MERGE_SD to 0, and remove all code covered by it
  - define FF_API_MERGE_SD to 0, and remove all code covered by it
- next API bump (typically two years in the future or so):
  - define FF_API_LAVF_KEEPSIDE_FLAG to 0, and remove all code covered
    by it
  - define FF_API_MERGE_SD_API to 0, and remove all code covered by it

This forces anyone who actually wants packet side data to temporarily
use deprecated API to get it all. If you ask me, this is batshit fucked
up crazy, but it's how we roll. Making AVFMT_FLAG_KEEP_SIDE_DATA to be
set by default was rejected as an ABI change, so I'm going all the way
to get rid of this once and for all.

Reviewed-by: James Almer <jamrial@gmail.com>
Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
wm4 2017-03-16 04:52:55 +01:00
parent 5e3a418b60
commit d682ae70b4
10 changed files with 73 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
doc/APIchanges
View File

@ -15,6 +15,11 @@ libavutil: 2015-08-28
API changes, most recent first:
2017-03-21 - xxxxxxx - lavf 57.66.105, lavc 57.83.101 - avformat.h, avcodec.h
Deprecate AVFMT_FLAG_KEEP_SIDE_DATA. It will be ignored after the next major
bump, and libavformat will behave as if it were always set.
Deprecate av_packet_merge_side_data() and av_packet_split_side_data().
2016-03-20 - xxxxxxx - lavu 55.50.100 / 55.21.0 - imgutils.h
Add av_image_copy_uc_from(), a version of av_image_copy() for copying
from GPU mapped memory.

4
libavcodec/avcodec.h
View File

@ -4576,9 +4576,13 @@ int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
int *size);
#if FF_API_MERGE_SD_API
attribute_deprecated
int av_packet_merge_side_data(AVPacket *pkt);
attribute_deprecated
int av_packet_split_side_data(AVPacket *pkt);
#endif
const char *av_packet_side_data_name(enum AVPacketSideDataType type);

4
libavcodec/avpacket.c
View File

@ -379,6 +379,8 @@ const char *av_packet_side_data_name(enum AVPacketSideDataType type)
return NULL;
}
#if FF_API_MERGE_SD_API
#define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
int av_packet_merge_side_data(AVPacket *pkt){
@ -460,6 +462,8 @@ int av_packet_split_side_data(AVPacket *pkt){
return 0;
}
#endif
uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size)
{
AVDictionaryEntry *t = NULL;

24
libavcodec/utils.c
View File

@ -2263,7 +2263,11 @@ int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *pi
if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size ||
(avctx->active_thread_type & FF_THREAD_FRAME)) {
#if FF_API_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
int did_split = av_packet_split_side_data(&tmp);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
ret = apply_param_change(avctx, &tmp);
if (ret < 0)
goto fail;
@ -2295,11 +2299,13 @@ fail:
emms_c(); //needed to avoid an emms_c() call before every return;
avctx->internal->pkt = NULL;
#if FF_API_MERGE_SD
if (did_split) {
av_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = avpkt->size;
}
#endif
if (picture->flags & AV_FRAME_FLAG_DISCARD) {
*got_picture_ptr = 0;
}
@ -2369,7 +2375,11 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
uint8_t discard_reason = 0;
// copy to ensure we do not change avpkt
AVPacket tmp = *avpkt;
#if FF_API_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
int did_split = av_packet_split_side_data(&tmp);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
ret = apply_param_change(avctx, &tmp);
if (ret < 0)
goto fail;
@ -2481,11 +2491,13 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
fail:
avctx->internal->pkt = NULL;
#if FF_API_MERGE_SD
if (did_split) {
av_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = avpkt->size;
}
#endif
if (ret >= 0 && *got_frame_ptr) {
if (!avctx->refcounted_frames) {
@ -2682,6 +2694,8 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
AVPacket pkt_recoded;
AVPacket tmp = *avpkt;
#if FF_API_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
int did_split = av_packet_split_side_data(&tmp);
//apply_param_change(avctx, &tmp);
@ -2694,6 +2708,8 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
memset(tmp.data + tmp.size, 0,
FFMIN(avpkt->size - tmp.size, AV_INPUT_BUFFER_PADDING_SIZE));
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
pkt_recoded = tmp;
ret = recode_subtitle(avctx, &pkt_recoded, &tmp);
@ -2753,11 +2769,13 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
avctx->internal->pkt = NULL;
}
#if FF_API_MERGE_SD
if (did_split) {
av_packet_free_side_data(&tmp);
if(ret == tmp.size)
ret = avpkt->size;
}
#endif
if (*got_sub_ptr)
avctx->frame_number++;
@ -2873,12 +2891,18 @@ int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacke
if (avctx->codec->send_packet) {
if (avpkt) {
AVPacket tmp = *avpkt;
#if FF_API_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
int did_split = av_packet_split_side_data(&tmp);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
ret = apply_param_change(avctx, &tmp);
if (ret >= 0)
ret = avctx->codec->send_packet(avctx, &tmp);
#if FF_API_MERGE_SD
if (did_split)
av_packet_free_side_data(&tmp);
#endif
return ret;
} else {
return avctx->codec->send_packet(avctx, NULL);

9
libavcodec/version.h
View File

@ -29,7 +29,7 @@
#define LIBAVCODEC_VERSION_MAJOR 57
#define LIBAVCODEC_VERSION_MINOR 83
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
@ -157,6 +157,9 @@
#ifndef FF_API_VAAPI_CONTEXT
#define FF_API_VAAPI_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_MERGE_SD
#define FF_API_MERGE_SD (LIBAVCODEC_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_AVCTX_TIMEBASE
#define FF_API_AVCTX_TIMEBASE (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
@ -229,5 +232,9 @@
#ifndef FF_API_STRUCT_VAAPI_CONTEXT
#define FF_API_STRUCT_VAAPI_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#ifndef FF_API_MERGE_SD_API
#define FF_API_MERGE_SD_API (LIBAVCODEC_VERSION_MAJOR < 59)
#endif
#endif /* AVCODEC_VERSION_H */

4
libavformat/avformat.h
View File

@ -1468,7 +1468,9 @@ typedef struct AVFormatContext {
#define AVFMT_FLAG_MP4A_LATM 0x8000 ///< Enable RTP MP4A-LATM payload
#define AVFMT_FLAG_SORT_DTS 0x10000 ///< try to interleave outputted packets by dts (using this flag can slow demuxing down)
#define AVFMT_FLAG_PRIV_OPT 0x20000 ///< Enable use of private options by delaying codec open (this could be made default once all code is converted)
#define AVFMT_FLAG_KEEP_SIDE_DATA 0x40000 ///< Don't merge side data but keep it separate.
#if FF_API_LAVF_KEEPSIDE_FLAG
#define AVFMT_FLAG_KEEP_SIDE_DATA 0x40000 ///< Don't merge side data but keep it separate. Deprecated, will be the default.
#endif
#define AVFMT_FLAG_FAST_SEEK 0x80000 ///< Enable fast, but inaccurate seeks for some formats
#define AVFMT_FLAG_SHORTEST 0x100000 ///< Stop muxing when the shortest stream stops.
#define AVFMT_FLAG_AUTO_BSF 0x200000 ///< Wait for packet data before writing a header, and add bitstream filters as requested by the muxer

12
libavformat/mux.c
View File

@ -752,7 +752,11 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
}
}
#if FF_API_LAVF_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
did_split = av_packet_split_side_data(pkt);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (!s->internal->header_written) {
ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
@ -777,8 +781,12 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
}
fail:
#if FF_API_LAVF_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
if (did_split)
av_packet_merge_side_data(pkt);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (ret < 0) {
pkt->pts = pts_backup;
@ -875,8 +883,12 @@ static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
}
}
#if FF_API_LAVF_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
if (st->internal->nb_bsfcs)
av_packet_split_side_data(pkt);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
for (i = 0; i < st->internal->nb_bsfcs; i++) {
AVBSFContext *ctx = st->internal->bsfcs[i];

2
libavformat/options_table.h
View File

@ -48,7 +48,9 @@ static const AVOption avformat_options[] = {
{"igndts", "ignore dts", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_IGNDTS }, INT_MIN, INT_MAX, D, "fflags"},
{"discardcorrupt", "discard corrupted frames", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_DISCARD_CORRUPT }, INT_MIN, INT_MAX, D, "fflags"},
{"sortdts", "try to interleave outputted packets by dts", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_SORT_DTS }, INT_MIN, INT_MAX, D, "fflags"},
#if FF_API_LAVF_KEEPSIDE_FLAG
{"keepside", "don't merge side data", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_KEEP_SIDE_DATA }, INT_MIN, INT_MAX, D, "fflags"},
#endif
{"fastseek", "fast but inaccurate seeks", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_FAST_SEEK }, INT_MIN, INT_MAX, D, "fflags"},
{"latm", "enable RTP MP4A-LATM payload", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_MP4A_LATM }, INT_MIN, INT_MAX, E, "fflags"},
{"nobuffer", "reduce the latency introduced by optional buffering", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_FLAG_NOBUFFER }, 0, INT_MAX, D, "fflags"},

4
libavformat/utils.c
View File

@ -1675,8 +1675,12 @@ FF_ENABLE_DEPRECATION_WARNINGS
st->inject_global_side_data = 0;
}
#if FF_API_LAVF_MERGE_SD
FF_DISABLE_DEPRECATION_WARNINGS
if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
av_packet_merge_side_data(pkt);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);

8
libavformat/version.h
View File

@ -33,7 +33,7 @@
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 57
#define LIBAVFORMAT_VERSION_MINOR 66
#define LIBAVFORMAT_VERSION_MICRO 104
#define LIBAVFORMAT_VERSION_MICRO 105
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
@ -88,6 +88,12 @@
#ifndef FF_API_HLS_WRAP
#define FF_API_HLS_WRAP (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_MERGE_SD
#define FF_API_LAVF_MERGE_SD (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_LAVF_KEEPSIDE_FLAG
#define FF_API_LAVF_KEEPSIDE_FLAG (LIBAVFORMAT_VERSION_MAJOR < 58)
#endif
#ifndef FF_API_R_FRAME_RATE