[FFmpeg-devel] Optimize H264 decoding for loongarch.

[guxiwei]

LGTM

> 2021年12月15日 下午2:06，Shiyou Yin <yinshiyou-hf at loongson.cn> 写道：
> 
> 
> 
>> 2021年12月15日 上午11:51，Hao Chen <chenhao at loongson.cn> 写道：
>> 
>> ./ffmpeg -i 1_h264_1080p_30fps_3Mbps.mp4 -f rawvideo -y /dev/null -an
>> before: 170fps
>> after : 296fps
>> 
>> V2: Update loongson_intrinsics.h to 1.0.3 in patch 2/7.
>> V3: Resubmit these patches due to the encoding problem of the last
>> email.
>> 
>> [PATCH v3 1/7] avutil: [loongarch] Add support for loongarch SIMD.
>> [PATCH v3 2/7] avcodec: [loongarch] Optimize h264_chroma_mc with LASX.
>> [PATCH v3 3/7] avcodec: [loongarch] Optimize h264qpel with LASX.
>> [PATCH v3 4/7] avcodec: [loongarch] Optimize h264dsp with LASX.
>> [PATCH v3 5/7] avcodec: [loongarch] Optimize h264idct with LASX.
>> [PATCH v3 6/7] avcodec: [loongarch] Optimize h264_deblock with LASX.
>> [PATCH v3 7/7] avcodec: [loongarch] Optimize pred16x16_plane with LASX.
>> 
> 
> LGTM.
> 
> These patches are extracted from loongson internal repository of ffmpeg which has
> been used and verified on loongarch platform for more than half year.
> I hope it can catch up with the release of 5.0.
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