avcodec, avformat: deprecate anything related to side data merging

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.

wm4 committed 9 years ago

Commit d682ae71 parent 5e3a41810 files · +73 −3Browse files

Unified · Split

10 files

doc/APIchanges +5 −0
libavcodec/avcodec.h +4 −0
libavcodec/avpacket.c +4 −0
libavcodec/utils.c +24 −0
libavcodec/version.h +8 −1
libavformat/avformat.h +3 −1
libavformat/mux.c +12 −0
libavformat/options_table.h +2 −0
libavformat/utils.c +4 −0
libavformat/version.h +7 −1

doc/APIchanges+5−0

 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.

libavcodec/avcodec.h+4−0

 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);

libavcodec/avpacket.c+4−0

     return NULL;
 }
+#if FF_API_MERGE_SD_API
 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
 int av_packet_merge_side_data(AVPacket *pkt){
     return 0;
 }
+#endif
 uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size)
 {
     AVDictionaryEntry *t = NULL;

libavcodec/utils.c+24−0

     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;
         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;
         }
         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;
         }
 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) {
     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);
             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);
             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++;
     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);

libavcodec/version.h+8−1

 #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, \
 #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
 #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 */

libavformat/avformat.h+3−1

 #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

libavformat/mux.c+12−0

         }
     }
+#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);
     }
 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;
         }
     }
+#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];

libavformat/options_table.h+2−0

 {"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"},

libavformat/utils.c+4−0

             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);

libavformat/version.h+7−1

 // 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, \
 #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

avcodec, avformat: deprecate anything related to side data merging

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