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V4L/DVB (5271): Add VIDIOC_TRY_ENCODER_CMD and VIDIOC_ENCODER_CMD ioctls. 

Add support for starting, stopping, pausing and resuming an MPEG (or similar
compressed stream) encoder.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2007-02-18 14:56:22 -03:00 committed by Mauro Carvalho Chehab
parent db6eb5b334
commit ada6ecd2bf
4 changed files with 54 additions and 2 deletions
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4
drivers/media/video/v4l2-common.c
View File

@ -374,7 +374,9 @@ static const char *v4l2_ioctls[] = {
#if 1
[_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
[_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
[_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX"
[_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
[_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
[_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD"
#endif
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)

24
drivers/media/video/videodev.c
View File

@ -1354,6 +1354,30 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
p->entries,p->entries_cap);
break;
}
case VIDIOC_ENCODER_CMD:
{
struct v4l2_encoder_cmd *p=arg;
if (!vfd->vidioc_encoder_cmd)
break;
ret=vfd->vidioc_encoder_cmd(file, fh, p);
if (!ret)
dbgarg (cmd, "cmd=%d, flags=%d\n",
p->cmd,p->flags);
break;
}
case VIDIOC_TRY_ENCODER_CMD:
{
struct v4l2_encoder_cmd *p=arg;
if (!vfd->vidioc_try_encoder_cmd)
break;
ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
if (!ret)
dbgarg (cmd, "cmd=%d, flags=%d\n",
p->cmd,p->flags);
break;
}
case VIDIOC_G_PARM:
{
struct v4l2_streamparm *p=arg;

24
include/linux/videodev2.h
View File

@ -1193,7 +1193,7 @@ struct v4l2_audioout
};
/*
* M P E G I N D E X
* M P E G S E R V I C E S
*
* NOTE: EXPERIMENTAL API
*/
@ -1218,6 +1218,26 @@ struct v4l2_enc_idx {
__u32 reserved[4];
struct v4l2_enc_idx_entry entry[V4L2_ENC_IDX_ENTRIES];
};
#define V4L2_ENC_CMD_START (0)
#define V4L2_ENC_CMD_STOP (1)
#define V4L2_ENC_CMD_PAUSE (2)
#define V4L2_ENC_CMD_RESUME (3)
/* Flags for V4L2_ENC_CMD_STOP */
#define V4L2_ENC_CMD_STOP_AT_GOP_END (1 << 0)
struct v4l2_encoder_cmd {
__u32 cmd;
__u32 flags;
union {
struct {
__u32 data[8];
} raw;
};
};
#endif
@ -1415,6 +1435,8 @@ struct v4l2_register {
#define VIDIOC_ENUM_FRAMESIZES _IOWR ('V', 74, struct v4l2_frmsizeenum)
#define VIDIOC_ENUM_FRAMEINTERVALS _IOWR ('V', 75, struct v4l2_frmivalenum)
#define VIDIOC_G_ENC_INDEX _IOR ('V', 76, struct v4l2_enc_idx)
#define VIDIOC_ENCODER_CMD _IOWR ('V', 77, struct v4l2_encoder_cmd)
#define VIDIOC_TRY_ENCODER_CMD _IOWR ('V', 78, struct v4l2_encoder_cmd)
#endif
/* only implemented if CONFIG_VIDEO_ADV_DEBUG is defined */
#define VIDIOC_DBG_S_REGISTER _IOW ('d', 100, struct v4l2_register)

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

@ -273,6 +273,10 @@ struct video_device
struct v4l2_jpegcompression *a);
int (*vidioc_g_enc_index) (struct file *file, void *fh,
struct v4l2_enc_idx *a);
int (*vidioc_encoder_cmd) (struct file *file, void *fh,
struct v4l2_encoder_cmd *a);
int (*vidioc_try_encoder_cmd) (struct file *file, void *fh,
struct v4l2_encoder_cmd *a);
/* Stream type-dependent parameter ioctls */
int (*vidioc_g_parm) (struct file *file, void *fh,