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>

4 files changed, 54 insertions, 2 deletions

diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index 2fe97c4cb35c..57aaed3239d6 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -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)
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index cd13e6108e5e..011938fb7e0e 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -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;
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 42cfdd2d50db..854875869dbd 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -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)
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index e5e87e44c585..1dd3d3239ecf 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -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,