[FFmpeg-devel] [PATCH v2 1/1] avcodec, avformat/ffjni: fix duplicate JNI symbols

[Matthieu Bouron]

On Mon, Apr 01, 2024 at 10:03:54AM +0200, Matthieu Bouron wrote:
> On Wed, Mar 27, 2024 at 09:06:19AM -0400, Leo Izen wrote:
> > Use SHLIBOBJS and STLIBOBJS in the Makefiles for avcodec and avformat,
> > and add a stub ffjni.c to libavformat, which allows the symbols to be
> > duplicated for shared builds but not static builds.
> > 
> > Signed-off-by: Leo Izen <leo.izen at gmail.com>
> > ---
> >  libavcodec/Makefile  |  1 +
> >  libavformat/Makefile |  1 +
> >  libavformat/ffjni.c  | 23 +++++++++++++++++++++++
> >  libavformat/file.c   |  2 +-
> >  4 files changed, 26 insertions(+), 1 deletion(-)
> >  create mode 100644 libavformat/ffjni.c
> > 
> > diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> > index 9ce6d445c1..113adb22d5 100644
> > --- a/libavcodec/Makefile
> > +++ b/libavcodec/Makefile
> > @@ -1068,6 +1068,7 @@ STLIBOBJS-$(CONFIG_ISO_MEDIA)          += mpegaudiotabs.o
> >  STLIBOBJS-$(CONFIG_FLV_MUXER)          += mpeg4audio_sample_rates.o
> >  STLIBOBJS-$(CONFIG_HLS_DEMUXER)        += ac3_channel_layout_tab.o
> >  STLIBOBJS-$(CONFIG_IMAGE_JPEGXL_PIPE_DEMUXER) += jpegxl_parse.o
> > +STLIBOBJS-$(CONFIG_JNI)                += ffjni.o
> >  STLIBOBJS-$(CONFIG_JPEGXL_ANIM_DEMUXER)       += jpegxl_parse.o
> >  STLIBOBJS-$(CONFIG_MATROSKA_DEMUXER)   += mpeg4audio_sample_rates.o
> >  STLIBOBJS-$(CONFIG_MOV_DEMUXER)        += ac3_channel_layout_tab.o
> > diff --git a/libavformat/Makefile b/libavformat/Makefile
> > index 44aa485029..a89df7e9a3 100644
> > --- a/libavformat/Makefile
> > +++ b/libavformat/Makefile
> > @@ -728,6 +728,7 @@ SHLIBOBJS-$(CONFIG_ISO_MEDIA)            += mpegaudiotabs.o
> >  SHLIBOBJS-$(CONFIG_FLV_MUXER)            += mpeg4audio_sample_rates.o
> >  SHLIBOBJS-$(CONFIG_HLS_DEMUXER)          += ac3_channel_layout_tab.o
> >  SHLIBOBJS-$(CONFIG_IMAGE_JPEGXL_PIPE_DEMUXER)    += jpegxl_parse.o
> > +SHLIBOBJS-$(CONFIG_JNI)                  += ffjni.o
> >  SHLIBOBJS-$(CONFIG_JPEGXL_ANIM_DEMUXER)  += jpegxl_parse.o
> >  SHLIBOBJS-$(CONFIG_MATROSKA_DEMUXER)     += mpeg4audio_sample_rates.o
> >  SHLIBOBJS-$(CONFIG_MOV_DEMUXER)          += ac3_channel_layout_tab.o
> > diff --git a/libavformat/ffjni.c b/libavformat/ffjni.c
> > new file mode 100644
> > index 0000000000..2b1483cf42
> > --- /dev/null
> > +++ b/libavformat/ffjni.c
> > @@ -0,0 +1,23 @@
> > +/*
> > + * JNI utility functions - included stub
> > + *
> > + * Copyright (c) 2024 Leo Izen <leo.izen at gmail.com>
> > + *
> > + * This file is part of FFmpeg.
> > + *
> > + * FFmpeg is free software; you can redistribute it and/or
> > + * modify it under the terms of the GNU Lesser General Public
> > + * License as published by the Free Software Foundation; either
> > + * version 2.1 of the License, or (at your option) any later version.
> > + *
> > + * FFmpeg is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> > + * Lesser General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU Lesser General Public
> > + * License along with FFmpeg; if not, write to the Free Software
> > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> > + */
> > +
> > +#include "libavcodec/ffjni.c"
> > diff --git a/libavformat/file.c b/libavformat/file.c
> > index 182995717a..1f853e0e17 100644
> > --- a/libavformat/file.c
> > +++ b/libavformat/file.c
> > @@ -527,8 +527,8 @@ const URLProtocol ff_fd_protocol = {
> >  
> >  #if CONFIG_ANDROID_CONTENT_PROTOCOL
> >  #include <jni.h>
> > +#include "libavcodec/ffjni.h"
> >  #include "libavcodec/jni.h"
> > -#include "libavcodec/ffjni.c"
> >  
> >  typedef struct JFields {
> >      jclass uri_class;
> 
> LGTM, thanks.

Once the patch is applied. Can you also backport it to the 7.0 branch ?

Thanks in advance,

-- 
Matthieu B.