Can I use C++to call the MPP function of ffmpeg rockchip

[jinjie412]

in FFmpeg CLI for Rockchip platforms ，Can I use C++to call the MPP function of ffmpeg rockchip

[nyanmisaka]

https://github.com/nyanmisaka/ffmpeg-rockchip/blob/master/doc/examples/qsv_decode.c https://github.com/nyanmisaka/ffmpeg-rockchip/blob/master/doc/examples/qsv_transcode.c

Please refer to QSV examples. Usually you only need to replace the following content to adapt to RKMPP.

AV_PIX_FMT_QSV => AV_PIX_FMT_DRM_PRIME

AV_HWDEVICE_TYPE_QSV => AV_HWDEVICE_TYPE_RKMPP

h264_qsv => h264_rkmpp

[dwaithe]

I have setup your FFMPEG and can decode and encode video from the command line. I want to run directly in my own code. When I run the qsv_decode.c with the above recommended changes I get the following error:

src/rkmpp_decode.c:160:47: error: ‘AV_HWDEVICE_TYPE_RKMPP’ undeclared (first use in this function); did you mean ‘AV_HWDEVICE_TYPE_DRM’? 160 | ret = av_hwdevice_ctx_create(&device_ref, AV_HWDEVICE_TYPE_RKMPP, | ^~~~~~ | AV_HWDEVICE_TYPE_DRM src/rkmpp_decode.c:160:47: note: each undeclared identifier is reported only once for each function it appears in src/rkmpp_decode.c:161:34: error: expected expression before ‘auto’ 161 | auto, NULL, 0); | ^~~~ src/rkmpp_decode.c:160:11: error: too few arguments to function ‘av_hwdevice_ctx_create’ 160 | ret = av_hwdevice_ctx_create(&device_ref, AV_HWDEVICE_TYPE_RKMPP, | ^~~~~~ In file included from /usr/include/aarch64-linux-gnu/libavcodec/avcodec.h:39, from /usr/include/aarch64-linux-gnu/libavformat/avformat.h:312, from src/rkmpp_decode.c:35: /usr/include/aarch64-linux-gnu/libavutil/hwcontext.h:303:5: note: declared here 303 | int av_hwdevice_ctx_create(AVBufferRef **device_ctx, enum AVHWDeviceType type,

Here is my ldd: linux-vdso.so.1 (0x0000007fbe4db000) libavformat.so.60 => /lib/libavformat.so.60 (0x0000007fbe203000) libavcodec.so.60 => /lib/libavcodec.so.60 (0x0000007fbd171000) libavutil.so.58 => /lib/libavutil.so.58 (0x0000007fbc095000) libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000007fbbf22000) /lib/ld-linux-aarch64.so.1 (0x0000007fbe4ab000) libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000007fbbe77000) libz.so.1 => /lib/aarch64-linux-gnu/libz.so.1 (0x0000007fbbe4d000) libpthread.so.0 => /lib/aarch64-linux-gnu/libpthread.so.0 (0x0000007fbbe1c000) libswresample.so.4 => /lib/libswresample.so.4 (0x0000007fbbdf5000) librga.so.2 => /lib/aarch64-linux-gnu/librga.so.2 (0x0000007fbbdb3000) liblzma.so.5 => /lib/aarch64-linux-gnu/liblzma.so.5 (0x0000007fbbd7f000) librockchip_mpp.so.1 => /usr/local/lib/librockchip_mpp.so.1 (0x0000007fbbb5e000) libdrm.so.2 => /lib/aarch64-linux-gnu/libdrm.so.2 (0x0000007fbbb3a000) libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000007fbb955000) libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000007fbb931000)

My compiler command: gcc -L/usr/local/lib -L/usr/lib -o rkmpp_decode src/rkmpp_decode.c -lrockchip_vpu -lavformat -lavcodec -lavutil -lm -lrockchip_mpp

Am I missing something? Thanks for the great work!

[nyanmisaka]

You are using the header files of vanilla ffmpeg, so of course there won't be RKMPP definitions there. /usr/include/aarch64-linux-gnu/libavutil/hwcontext.h

[dwaithe]

Well spotted. I had the correct libraries but the wrong headers. Thanks so much! I have got it working with my code now.