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| author | Daniel Almeida <daniel.almeida@collabora.com> | 2022-11-05 16:58:42 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-11-25 10:32:16 +0300 |
| commit | 0c078e310b6d16b9b9489bbc7bc1476430d19a7c (patch) | |
| tree | cb78cd0de1afe9db2b2bca2040494bf69412f62d /drivers/media/test-drivers/visl/visl-video.h | |
| parent | ae2caf391fec8c2d449518ef4dabd36a32fd5ded (diff) | |
| download | linux-0c078e310b6d16b9b9489bbc7bc1476430d19a7c.tar.xz | |
media: visl: add virtual stateless decoder driver
A virtual stateless device for stateless uAPI development purposes.
This tool's objective is to help the development and testing of
userspace applications that use the V4L2 stateless API to decode media.
A userspace implementation can use visl to run a decoding loop even when
no hardware is available or when the kernel uAPI for the codec has not
been upstreamed yet. This can reveal bugs at an early stage.
This driver can also trace the contents of the V4L2 controls submitted
to it. It can also dump the contents of the vb2 buffers through a
debugfs interface. This is in many ways similar to the tracing
infrastructure available for other popular encode/decode APIs out there
and can help develop a userspace application by using another (working)
one as a reference.
Note that no actual decoding of video frames is performed by visl. The
V4L2 test pattern generator is used to write various debug information
to the capture buffers instead.
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/test-drivers/visl/visl-video.h')
| -rw-r--r-- | drivers/media/test-drivers/visl/visl-video.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/media/test-drivers/visl/visl-video.h b/drivers/media/test-drivers/visl/visl-video.h new file mode 100644 index 000000000000..27ad70a558db --- /dev/null +++ b/drivers/media/test-drivers/visl/visl-video.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Contains the driver implementation for the V4L2 stateless interface. + */ + +#ifndef _VISL_VIDEO_H_ +#define _VISL_VIDEO_H_ +#include <media/v4l2-mem2mem.h> + +#include "visl.h" + +extern const struct v4l2_ioctl_ops visl_ioctl_ops; + +extern const struct visl_ctrls visl_fwht_ctrls; +extern const struct visl_ctrls visl_mpeg2_ctrls; +extern const struct visl_ctrls visl_vp8_ctrls; +extern const struct visl_ctrls visl_vp9_ctrls; +extern const struct visl_ctrls visl_h264_ctrls; +extern const struct visl_ctrls visl_hevc_ctrls; + +int visl_queue_init(void *priv, struct vb2_queue *src_vq, + struct vb2_queue *dst_vq); + +int visl_set_default_format(struct visl_ctx *ctx); +int visl_request_validate(struct media_request *req); + +#endif /* _VISL_VIDEO_H_ */ |