configure: Add (h264|hevc)_sei subsystems

Currently, several components select atsc_a53, despite
not using anything from it themselves. They only select
it because parsing SEI messages adds an indirect dependency.
But using direct dependencies is more natural, so add
dedicated subsystems for them.

It already allows to remove a superfluous dependency of
the HEVC QSV encoder on hevc_sei and atsc_a53.

Adding new subsystems only becomes effective after a reconfiguration.
In order to force this, some needed headers (which are only included
implicitly before this commit) were included explicitly in
libavformat/allformats.c.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

configure

@@ -2450,7 +2450,9 @@ CONFIG_EXTRA="
     h264parse
     h264pred
     h264qpel
+    h264_sei
     hevcparse
+    hevc_sei
     hpeldsp
     huffman
     huffyuvdsp
@@ -2722,7 +2724,9 @@ faandct_select="fdctdsp"
 faanidct_deps="faan"
 faanidct_select="idctdsp"
 h264dsp_select="startcode"
-hevcparse_select="atsc_a53 golomb"
+h264_sei_select="atsc_a53 golomb"
+hevcparse_select="golomb"
+hevc_sei_select="atsc_a53 golomb"
 frame_thread_encoder_deps="encoders threads"
 inflate_wrapper_deps="zlib"
 intrax8_select="blockdsp wmv2dsp"
@@ -2820,12 +2824,12 @@ h263_encoder_select="h263dsp mpegvideoenc"
 h263i_decoder_select="h263_decoder"
 h263p_decoder_select="h263_decoder"
 h263p_encoder_select="h263_encoder"
-h264_decoder_select="atsc_a53 cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
+h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel h264_sei videodsp"
 h264_decoder_suggest="error_resilience"
 hap_decoder_select="snappy texturedsp"
 hap_encoder_deps="libsnappy"
 hap_encoder_select="texturedspenc"
-hevc_decoder_select="atsc_a53 bswapdsp cabac dovi_rpu golomb hevcparse videodsp"
+hevc_decoder_select="bswapdsp cabac dovi_rpu golomb hevcparse hevc_sei videodsp"
 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
 hymt_decoder_select="huffyuv_decoder"
@@ -3253,8 +3257,8 @@ av1_qsv_encoder_deps="libvpl"
 # parsers
 aac_parser_select="adts_header mpeg4audio"
 av1_parser_select="cbs_av1"
-h264_parser_select="atsc_a53 golomb h264dsp h264parse"
-hevc_parser_select="hevcparse"
+h264_parser_select="golomb h264dsp h264parse h264_sei"
+hevc_parser_select="hevcparse hevc_sei"
 mpegaudio_parser_select="mpegaudioheader"
 mpeg4video_parser_select="h263dsp mpegvideodec qpeldsp"
 vc1_parser_select="vc1dsp"

libavcodec/Makefile

@@ -99,8 +99,9 @@ OBJS-$(CONFIG_H264DSP)                 += h264dsp.o h264idct.o
 OBJS-$(CONFIG_H264PARSE)               += h264_parse.o h2645_parse.o h264_ps.o
 OBJS-$(CONFIG_H264PRED)                += h264pred.o
 OBJS-$(CONFIG_H264QPEL)                += h264qpel.o
-OBJS-$(CONFIG_HEVCPARSE)               += hevc_parse.o h2645_parse.o hevc_ps.o hevc_sei.o hevc_data.o \
-                                          dynamic_hdr10_plus.o dynamic_hdr_vivid.o
+OBJS-$(CONFIG_H264_SEI)                += h264_sei.o
+OBJS-$(CONFIG_HEVCPARSE)               += hevc_parse.o h2645_parse.o hevc_ps.o hevc_data.o
+OBJS-$(CONFIG_HEVC_SEI)                += hevc_sei.o dynamic_hdr10_plus.o dynamic_hdr_vivid.o
 OBJS-$(CONFIG_HPELDSP)                 += hpeldsp.o
 OBJS-$(CONFIG_HUFFMAN)                 += huffman.o
 OBJS-$(CONFIG_HUFFYUVDSP)              += huffyuvdsp.o
@@ -391,7 +392,7 @@ OBJS-$(CONFIG_H263_V4L2M2M_ENCODER)    += v4l2_m2m_enc.o
 OBJS-$(CONFIG_H264_DECODER)            += h264dec.o h264_cabac.o h264_cavlc.o \
                                           h264_direct.o h264_loopfilter.o  \
                                           h264_mb.o h264_picture.o \
-                                          h264_refs.o h264_sei.o \
+                                          h264_refs.o \
                                           h264_slice.o h264data.o h274.o
 OBJS-$(CONFIG_H264_AMF_ENCODER)        += amfenc_h264.o
 OBJS-$(CONFIG_H264_CUVID_DECODER)      += cuviddec.o
@@ -1148,7 +1149,7 @@ OBJS-$(CONFIG_GIF_PARSER)              += gif_parser.o
 OBJS-$(CONFIG_GSM_PARSER)              += gsm_parser.o
 OBJS-$(CONFIG_H261_PARSER)             += h261_parser.o
 OBJS-$(CONFIG_H263_PARSER)             += h263_parser.o
-OBJS-$(CONFIG_H264_PARSER)             += h264_parser.o h264_sei.o h264data.o
+OBJS-$(CONFIG_H264_PARSER)             += h264_parser.o h264data.o
 OBJS-$(CONFIG_HEVC_PARSER)             += hevc_parser.o hevc_data.o
 OBJS-$(CONFIG_HDR_PARSER)              += hdr_parser.o
 OBJS-$(CONFIG_IPU_PARSER)              += ipu_parser.o

libavformat/allformats.c

@@ -20,6 +20,9 @@
  */
 
 #include <stdatomic.h>
+#include <stddef.h>
+#include <stdint.h>
+
 #include "libavformat/internal.h"
 #include "avformat.h"