On 09/03/2017 02:27 AM, Mark Thompson wrote:
+# check V4L2 codecs available in the API
check_header linux/fb.h
check_header linux/videodev.h
check_header linux/videodev2.h
check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width =
0;" && enable_safe struct_v4l2_frmivalenum_discrete
+check_code cc linux/videodev2.h "int i = V4L2_CAP_VIDEO_M2M_MPLANE |
V4L2_CAP_VIDEO_M2M | V4L2_BUF_FLAG_LAST;" || disable v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_VC1_ANNEX_G;" && enable
vc1_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG1;" && enable
mpeg1_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG2;" && enable
mpeg2_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG4;" && enable
mpeg4_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_HEVC;" && enable
hevc_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_H263;" && enable
h263_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_H264;" && enable
h264_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_VP8;" && enable
vp8_v4l2_m2m
+check_code cc linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;" && enable
vp9_v4l2_m2m
I think these need to appear as named config options somewhere. It doesn't
currently detect anything for me, even with e.g. --enable-v4l2-m2m
--enable-encoder=h264_v4l2m2m.
I dont think that would bring much value to be honest: since the ffmpeg
project doesn't contain a copy of linux/videodev2.h - something strongly
rejected by the maintainers - forcing the options would just cause a
build error so you would not gain anything.
do you have videodev2.h in your system? (in /usr/include/linux for instance)
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