[FFmpeg-devel] [PATCHSET] AAC decoder refactor

[Lynne]

Apr 12, 2024, 00:45 by michael at niedermayer.cc:

> On Thu, Apr 11, 2024 at 07:42:37AM +0200, Lynne wrote:
>
>> Apr 10, 2024, 23:57 by michael at niedermayer.cc:
>>
>> > On Wed, Apr 10, 2024 at 08:18:11PM +0200, Michael Niedermayer wrote:
>> >
>> >> On Wed, Apr 10, 2024 at 06:48:26PM +0200, Lynne wrote:
>> >> > Apr 8, 2024, 09:36 by dev at lynne.ee:
>> >> > 
>> >> > > The following patchset refactors the AAC decoder step by step,
>> >> > > removing all large-scale templating and abstracting away typed
>> >> > > DSP functions from symbol parsing.
>> >> > >
>> >> > > This series saves 110Kib of binary data from libavcodec.so
>> >> > > when compiled with Clang 18 with -O3, after stripping.
>> >> > >
>> >> > > The patchset can also be viewed here:
>> >> > > https://github.com/cyanreg/FFmpeg/tree/aac_cleanup
>> >> > >
>> >> > > Fate passes on each step, and I've been running this patchset for
>> >> > > a week with no issues.
>> >> > >
>> >> > > This also prepares the decoder for USAC support.
>> >> > >
>> >> > 
>> >> > I've rebased the linked repo to current git master if anyone
>> >> > wants to test.
>> >>
>> >> thanks, i will try to test it
>> >>
>> >
>> > make fate-source
>> >
>> > TEST    source
>> > --- ./tests/ref/fate/source	2024-04-08 18:26:00.670129617 +0200
>> > +++ tests/data/fate/source	2024-04-10 23:56:18.032896853 +0200
>> > @@ -22,6 +22,13 @@
>> >  compat/djgpp/math.h
>> >  compat/float/float.h
>> >  compat/float/limits.h
>> > +libavcodec/aac/aacdec.h
>> > +libavcodec/aac/aacdec_fixed_coupling.h
>> > +libavcodec/aac/aacdec_fixed_dequant.h
>> > +libavcodec/aac/aacdec_fixed_prediction.h
>> > +libavcodec/aac/aacdec_float_coupling.h
>> > +libavcodec/aac/aacdec_float_prediction.h
>> > +libavcodec/aac/aacdec_latm.h
>> >  libavcodec/bitstream_template.h
>> >  tools/decode_simple.h
>> >  Use of av_clip() where av_clip_uintp2() could be used:
>> > Test source failed. Look at tests/data/fate/source.err for details.
>> > tests/Makefile:310: recipe for target 'fate-source' failed
>> > make: *** [fate-source] Error 1
>> >
>>
>> Thanks for testing. Fixed both issues in the repo.
>> Was only testing with fate-aac while developing.
>>
>
> mips:
>
> make  -k
> LD	ffmpeg_g
> libavcodec/libavcodec.a(aacsbr.o): In function `ff_aac_sbr_ctx_alloc_init':
> aacsbr.c:(.text.unlikely+0x1d4): undefined reference to `ff_aacsbr_func_ptr_init_mips'
> aacsbr.c:(.text.unlikely+0x200): undefined reference to `ff_aacsbr_func_ptr_init_mips'
> libavcodec/libavcodec.a(sbrdsp.o): In function `ff_sbrdsp_init':
> sbrdsp.c:(.text.unlikely+0x10): undefined reference to `ff_sbrdsp_init_mips'
> sbrdsp.c:(.text.unlikely+0xb4): undefined reference to `ff_sbrdsp_init_mips'
> libavcodec/libavcodec.a(aacpsdsp_float.o): In function `ff_psdsp_init':
> aacpsdsp_float.c:(.text.unlikely+0x10): undefined reference to `ff_psdsp_init_mips'
> aacpsdsp_float.c:(.text.unlikely+0x6c): undefined reference to `ff_psdsp_init_mips'
> collect2: error: ld returned 1 exit status
> Makefile:136: recipe for target 'ffmpeg_g' failed
> make: *** [ffmpeg_g] Error 1
> LD	ffprobe_g
> libavcodec/libavcodec.a(aacsbr.o): In function `ff_aac_sbr_ctx_alloc_init':
> aacsbr.c:(.text.unlikely+0x1d4): undefined reference to `ff_aacsbr_func_ptr_init_mips'
> aacsbr.c:(.text.unlikely+0x200): undefined reference to `ff_aacsbr_func_ptr_init_mips'
> libavcodec/libavcodec.a(sbrdsp.o): In function `ff_sbrdsp_init':
> sbrdsp.c:(.text.unlikely+0x10): undefined reference to `ff_sbrdsp_init_mips'
> sbrdsp.c:(.text.unlikely+0xb4): undefined reference to `ff_sbrdsp_init_mips'
> libavcodec/libavcodec.a(aacpsdsp_float.o): In function `ff_psdsp_init':
> aacpsdsp_float.c:(.text.unlikely+0x10): undefined reference to `ff_psdsp_init_mips'
> aacpsdsp_float.c:(.text.unlikely+0x6c): undefined reference to `ff_psdsp_init_mips'
> collect2: error: ld returned 1 exit status
> Makefile:136: recipe for target 'ffprobe_g' failed
> make: *** [ffprobe_g] Error 1
> make: Target 'all' not remade because of errors.
>

Fixed. This should be all.
On the Loongson machine I have access to, I can't compile FFmpeg
due to missing asm/errno.h kernel header, while on the standard MIPS64
machine I can access, compilation worked either way.
Would you mind testing again the new version in the repo?

Thanks.