marfrit/libva-v4l2-request-fourier
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v4l2: Add helper for exporting with dma-buf

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Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
This commit is contained in:
Paul Kocialkowski
2018-07-18 14:30:38 +02:00
parent 793a29d668
commit 4cf9400dc2
2 changed files with 31 additions and 0 deletions
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src/v4l2.c
+28
View File
@@ -253,6 +253,34 @@ int v4l2_dequeue_buffer(int video_fd, int request_fd, unsigned int type,
return 0;
}
int v4l2_export_buffer(int video_fd, unsigned int type, unsigned int index,
unsigned int flags, int *export_fds,
unsigned int export_fds_count)
{
struct v4l2_exportbuffer exportbuffer;
unsigned int i;
int rc;
for (i = 0; i < export_fds_count; i++) {
memset(&exportbuffer, 0, sizeof(exportbuffer));
exportbuffer.type = type;
exportbuffer.index = index;
exportbuffer.plane = i;
exportbuffer.flags = flags;
rc = ioctl(video_fd, VIDIOC_EXPBUF, &exportbuffer);
if (rc < 0) {
sunxi_cedrus_log("Unable to export buffer: %s\n",
strerror(errno));
return -1;
}
export_fds[i] = exportbuffer.fd;
}
return 0;
}
int v4l2_set_control(int video_fd, int request_fd, unsigned int id, void *data,
unsigned int size)
{
src/v4l2.h
+3
View File
@@ -46,6 +46,9 @@ int v4l2_queue_buffer(int video_fd, int request_fd, unsigned int type,
unsigned int buffers_count);
int v4l2_dequeue_buffer(int video_fd, int request_fd, unsigned int type,
unsigned int index, unsigned int buffers_count);
int v4l2_export_buffer(int video_fd, unsigned int type, unsigned int index,
unsigned int flags, int *export_fds,
unsigned int export_fds_count);
int v4l2_set_control(int video_fd, int request_fd, unsigned int id, void *data,
unsigned int size);
int v4l2_set_stream(int video_fd, unsigned int type, bool enable);