Le jeudi 23 août 2018 à 16:31 +0200, Hans Verkuil a écrit : > > I propose adding these capabilities: > > > > #define V4L2_BUF_CAP_HAS_REQUESTS 0x00000001 > > #define V4L2_BUF_CAP_REQUIRES_REQUESTS 0x00000002 > > #define V4L2_BUF_CAP_HAS_MMAP 0x00000100 > > #define V4L2_BUF_CAP_HAS_USERPTR 0x00000200 > > #define V4L2_BUF_CAP_HAS_DMABUF 0x00000400 > > I substituted SUPPORTS for HAS and dropped the REQUIRES_REQUESTS capability. > As Tomasz mentioned, technically (at least for stateless codecs) you could > handle just one frame at a time without using requests. It's very inefficient, > but it would work. I thought the request was providing a data structure to refer back to the frames, so each codec don't have to implement one. Do you mean that the framework will implicitly request requests in that mode ? or simply that there is no such helper ?
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