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Commit ada6ecd2 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
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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: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent db6eb5b3

drivers/media/video/v4l2-common.c

+3 −1
Original line number Diff line number Diff line
@@ -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)

drivers/media/video/videodev.c

+24 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/videodev2.h

+23 −1
Original line number Diff line number Diff line
@@ -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)

include/media/v4l2-dev.h

+4 −0
Original line number Diff line number Diff line
@@ -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,