On 2/24/19 9:41 AM, Dafna Hirschfeld wrote:
> Add an array of request file descriptors to v4l_queue
> and add methods to allocate and get them.
>
> Signed-off-by: Dafna Hirschfeld <daf...@gmail.com>
This patch isn't right, just drop it altogether. These helpers are for v4l2
devices,
not for a media device.
Just use the media ioctls directly in v4l2-ctl and make the req_fds array a
local
array in a function or perhaps a global in v4l2-ctl-streaming.cpp.
Regards,
Hans
> ---
> utils/common/cv4l-helpers.h | 5 +++++
> utils/common/v4l-helpers.h | 22 ++++++++++++++++++++++
> 2 files changed, 27 insertions(+)
>
> diff --git a/utils/common/cv4l-helpers.h b/utils/common/cv4l-helpers.h
> index 1cd2b6b2..551d4673 100644
> --- a/utils/common/cv4l-helpers.h
> +++ b/utils/common/cv4l-helpers.h
> @@ -745,6 +745,7 @@ public:
> unsigned g_capabilities() const { return
> v4l_queue_g_capabilities(this); }
> unsigned g_length(unsigned plane) const { return
> v4l_queue_g_length(this, plane); }
> unsigned g_mem_offset(unsigned index, unsigned plane) const { return
> v4l_queue_g_mem_offset(this, index, plane); }
> + unsigned g_req_fd(unsigned index) const { return
> v4l_queue_g_req_fd(this, index); }
> void *g_mmapping(unsigned index, unsigned plane) const { return
> v4l_queue_g_mmapping(this, index, plane); }
> void s_mmapping(unsigned index, unsigned plane, void *m) {
> v4l_queue_s_mmapping(this, index, plane, m); }
> void *g_userptr(unsigned index, unsigned plane) const { return
> v4l_queue_g_userptr(this, index, plane); }
> @@ -797,6 +798,10 @@ public:
> {
> return v4l_queue_export_bufs(fd->g_v4l_fd(), this, exp_type);
> }
> + int alloc_req(int media_fd, unsigned index)
> + {
> + return v4l_queue_alloc_req(this, media_fd, index);
> + }
> void close_exported_fds()
> {
> v4l_queue_close_exported_fds(this);
> diff --git a/utils/common/v4l-helpers.h b/utils/common/v4l-helpers.h
> index 59d8566a..daa49a1f 100644
> --- a/utils/common/v4l-helpers.h
> +++ b/utils/common/v4l-helpers.h
> @@ -10,6 +10,7 @@
> #define _V4L_HELPERS_H_
>
> #include <linux/videodev2.h>
> +#include <linux/media.h>
> #include <string.h>
> #include <stdlib.h>
> #include <stdio.h>
> @@ -1414,6 +1415,7 @@ struct v4l_queue {
> void *mmappings[VIDEO_MAX_FRAME][VIDEO_MAX_PLANES];
> unsigned long userptrs[VIDEO_MAX_FRAME][VIDEO_MAX_PLANES];
> int fds[VIDEO_MAX_FRAME][VIDEO_MAX_PLANES];
> + int req_fds[VIDEO_MAX_FRAME];
> };
>
> static inline void v4l_queue_init(struct v4l_queue *q,
> @@ -1445,6 +1447,11 @@ static inline __u32 v4l_queue_g_mem_offset(const
> struct v4l_queue *q, unsigned i
> return q->mem_offsets[index][plane];
> }
>
> +static inline unsigned v4l_queue_g_req_fd(const struct v4l_queue *q,
> unsigned index)
> +{
> + return q->req_fds[index];
> +}
> +
> static inline void v4l_queue_s_mmapping(struct v4l_queue *q, unsigned index,
> unsigned plane, void *m)
> {
> q->mmappings[index][plane] = m;
> @@ -1701,6 +1708,21 @@ static inline int v4l_queue_export_bufs(struct v4l_fd
> *f, struct v4l_queue *q,
> return 0;
> }
>
> +static inline int v4l_queue_alloc_req(struct v4l_queue *q, int media_fd,
> unsigned index)
> +{
> + int rc = 0;
> +
> + rc = ioctl(media_fd, MEDIA_IOC_REQUEST_ALLOC, &q->req_fds[index]);
> + if (rc < 0) {
> + fprintf(stderr, "Unable to allocate media request: %s\n",
> + strerror(errno));
> + return rc;
> + }
> +
> + return 0;
> +}
> +
> +
> static inline void v4l_queue_close_exported_fds(struct v4l_queue *q)
> {
> unsigned b, p;
>
