android版本webrtc使用ffmpeg 解码h264编译报错

1, android studio使用ffmpeg解码h264编译报错：
 

third_party/ffmpeg/ffmpeg_internal/videodsp.o: in function `ff_prefetch_aarch64':
(.text+0x10): relocation truncated to fit: R_AARCH64_CONDBR19 against symbol `ff_prefetch_aarch64' defined in .text section in obj/third_party/ffmpeg/ffmpeg_internal/videodsp.o

2，查看相关代码

third_party/ffmpeg/libavcodec/aarch64/videodsp.S

#include "libavutil/aarch64/asm.S"

function ff_prefetch_aarch64, export=1
        subs            w2,  w2,  #2
        prfm            pldl1strm, [x0]
        prfm            pldl1strm, [x0,  x1]
        add             x0,  x0,  x1,  lsl #1
        b.gt            X(ff_prefetch_aarch64)
        ret
endfunc

3，原因：由于链接器如何将部分分配到地址空间造成的

4，修改以下文件

third_party/ffmpeg/libavcodec/aarch64/videodsp.S：

#include "libavutil/aarch64/asm.S"

function ff_prefetch_aarch64, export=1
        subs            w2,  w2,  #2
        prfm            pldl1strm, [x0]
        prfm            pldl1strm, [x0,  x1]
        add             x0,  x0,  x1,  lsl #1
        b            X(ff_prefetch_aarch64)
1:
        ret
endfunc