[FFmpeg-devel] [PATCH 2/6] libavfilter: Unify Execution Modes in DNN Filters

[Guo, Yejun]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Shubhanshu Saxena
> Sent: 2021年8月20日 22:21
> To: ffmpeg-devel at ffmpeg.org
> Cc: Shubhanshu Saxena <shubhanshu.e01 at gmail.com>
> Subject: [FFmpeg-devel] [PATCH 2/6] libavfilter: Unify Execution Modes in
> DNN Filters
> 
> This commit unifies the async and sync mode from the DNN filters'
> perspective. As of this commit, the Native backend only supports
> synchronous execution mode.
> 
> Now the user can switch between async and sync mode by using the 'async'
> option in the backend_configs. The values can be 1 for async and 0 for sync
> mode of execution.
> 
> This commit affects the following filters:
> 1. vf_dnn_classify
> 2. vf_dnn_detect
> 3. vf_dnn_processing
> 4. vf_sr
> 5. vf_derain
> 
> Signed-off-by: Shubhanshu Saxena <shubhanshu.e01 at gmail.com>
> ---
>  libavfilter/dnn/dnn_backend_common.c   |  2 +-
>  libavfilter/dnn/dnn_backend_common.h   |  5 +-
>  libavfilter/dnn/dnn_backend_native.c   | 59 +++++++++++++++-
>  libavfilter/dnn/dnn_backend_native.h   |  6 ++
>  libavfilter/dnn/dnn_backend_openvino.c | 94 ++++++++++----------------
> libavfilter/dnn/dnn_backend_openvino.h |  3 +-
>  libavfilter/dnn/dnn_backend_tf.c       | 35 ++--------
>  libavfilter/dnn/dnn_backend_tf.h       |  3 +-
>  libavfilter/dnn/dnn_interface.c        |  8 +--
>  libavfilter/dnn_filter_common.c        | 23 +------
>  libavfilter/dnn_filter_common.h        |  3 +-
>  libavfilter/dnn_interface.h            |  4 +-
>  libavfilter/vf_derain.c                |  7 ++
>  libavfilter/vf_dnn_classify.c          |  4 +-
>  libavfilter/vf_dnn_detect.c            |  8 +--
>  libavfilter/vf_dnn_processing.c        |  8 +--
>  libavfilter/vf_sr.c                    |  8 +++
>  17 files changed, 140 insertions(+), 140 deletions(-)
> 

https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=4638 caught a warning:
CC      libavfilter/vf_dnn_detect.o
src/libavfilter/vf_dnn_detect.c:499:12: warning: ‘dnn_detect_activate’ defined but not used [-Wunused-function]
 static int dnn_detect_activate(AVFilterContext *filter_ctx)
            ^~~~~~~~~~~~~~~~~~~
CC      libavfilter/vf_dnn_processing.o
src/libavfilter/vf_dnn_processing.c:413:12: warning: ‘activate’ defined but not used [-Wunused-function]
 static int activate(AVFilterContext *filter_ctx)
            ^~~~~~~~

I know it is fixed by the next patch, and the reason to separate these patches is for better change tracking.

So, we can add 'av_unused' for these unused functions in this patch.