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media: v4l2-mem2mem: add try_en/decoder_cmd ioctl helpers

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Most if not all codecs will need to implement these ioctls and
it is expected to be the same for all codecs. So add this to
the core v4l2-mem2mem framework so that this code can easily be
reused.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2019-05-29 02:45:59 -04:00 committed by Mauro Carvalho Chehab
parent ad2220aa45
commit ef732d5e28
2 changed files with 33 additions and 0 deletions
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29
drivers/media/v4l2-core/v4l2-mem2mem.c
View File

@ -1122,6 +1122,35 @@ int v4l2_m2m_ioctl_streamoff(struct file *file, void *priv,
}
EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamoff);
int v4l2_m2m_ioctl_try_encoder_cmd(struct file *file, void *fh,
struct v4l2_encoder_cmd *ec)
{
if (ec->cmd != V4L2_ENC_CMD_STOP && ec->cmd != V4L2_ENC_CMD_START)
return -EINVAL;
ec->flags = 0;
return 0;
}
EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_try_encoder_cmd);
int v4l2_m2m_ioctl_try_decoder_cmd(struct file *file, void *fh,
struct v4l2_decoder_cmd *dc)
{
if (dc->cmd != V4L2_DEC_CMD_STOP && dc->cmd != V4L2_DEC_CMD_START)
return -EINVAL;
dc->flags = 0;
if (dc->cmd == V4L2_DEC_CMD_STOP) {
dc->stop.pts = 0;
} else if (dc->cmd == V4L2_DEC_CMD_START) {
dc->start.speed = 0;
dc->start.format = V4L2_DEC_START_FMT_NONE;
}
return 0;
}
EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_try_decoder_cmd);
/*
* v4l2_file_operations helpers. It is assumed here same lock is used
* for the output and the capture buffer queue.

4
include/media/v4l2-mem2mem.h
View File

@ -672,6 +672,10 @@ int v4l2_m2m_ioctl_streamon(struct file *file, void *fh,
enum v4l2_buf_type type);
int v4l2_m2m_ioctl_streamoff(struct file *file, void *fh,
enum v4l2_buf_type type);
int v4l2_m2m_ioctl_try_encoder_cmd(struct file *file, void *fh,
struct v4l2_encoder_cmd *ec);
int v4l2_m2m_ioctl_try_decoder_cmd(struct file *file, void *fh,
struct v4l2_decoder_cmd *dc);
int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma);
__poll_t v4l2_m2m_fop_poll(struct file *file, poll_table *wait);