ffmpeg/tools/missing_codec_desc

#!/bin/sh

srcdir=${0%/*}/..

while read -r field equal value; do
  case "$field $equal" in
    ".id =")
      eval "known_${value%,}=1"
      ;;
  esac
done < $srcdir/libavcodec/codec_desc.c

known_AV_CODEC_ID_NONE=1
known_AV_CODEC_ID_FIRST_AUDIO=1
known_AV_CODEC_ID_FIRST_SUBTITLE=1
known_AV_CODEC_ID_FIRST_UNKNOWN=1
known_AV_CODEC_ID_PROBE=1
known_AV_CODEC_ID_MPEG2TS=1
known_AV_CODEC_ID_MPEG4SYSTEMS=1
known_AV_CODEC_ID_FFMETADATA=1

in=0
while read -r line; do
  case "$in-$line" in
    0-"enum AVCodecID"*) in=1;;
    1-*"};"*)            in=0;;
    1-*AV_CODEC_ID_*,*)
      cid="${line%%[, =]*}"
      eval "known=\$known_$cid"
      case "$known" in
        1) ;;
        *) echo "$cid missing";;
      esac
      ;;
  esac
done < $srcdir/libavcodec/avcodec.h