[media] v4l2: add VIDIOC_(TRY_)DECODER_CMD
As discussed during the 2011 V4L-DVB workshop, the API in dvb/video.h should
be replaced by a proper V4L2 API. This patch turns the VIDEO_(TRY_)DECODER_CMD
ioctls into proper V4L2 ioctls.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 0db0503..e4ba8d7 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1908,6 +1908,54 @@
};
};
+/* Decoder commands */
+#define V4L2_DEC_CMD_START (0)
+#define V4L2_DEC_CMD_STOP (1)
+#define V4L2_DEC_CMD_PAUSE (2)
+#define V4L2_DEC_CMD_RESUME (3)
+
+/* Flags for V4L2_DEC_CMD_START */
+#define V4L2_DEC_CMD_START_MUTE_AUDIO (1 << 0)
+
+/* Flags for V4L2_DEC_CMD_PAUSE */
+#define V4L2_DEC_CMD_PAUSE_TO_BLACK (1 << 0)
+
+/* Flags for V4L2_DEC_CMD_STOP */
+#define V4L2_DEC_CMD_STOP_TO_BLACK (1 << 0)
+#define V4L2_DEC_CMD_STOP_IMMEDIATELY (1 << 1)
+
+/* Play format requirements (returned by the driver): */
+
+/* The decoder has no special format requirements */
+#define V4L2_DEC_START_FMT_NONE (0)
+/* The decoder requires full GOPs */
+#define V4L2_DEC_START_FMT_GOP (1)
+
+/* The structure must be zeroed before use by the application
+ This ensures it can be extended safely in the future. */
+struct v4l2_decoder_cmd {
+ __u32 cmd;
+ __u32 flags;
+ union {
+ struct {
+ __u64 pts;
+ } stop;
+
+ struct {
+ /* 0 or 1000 specifies normal speed,
+ 1 specifies forward single stepping,
+ -1 specifies backward single stepping,
+ >1: playback at speed/1000 of the normal speed,
+ <-1: reverse playback at (-speed/1000) of the normal speed. */
+ __s32 speed;
+ __u32 format;
+ } start;
+
+ struct {
+ __u32 data[16];
+ } raw;
+ };
+};
#endif
@@ -2318,6 +2366,11 @@
#define VIDIOC_G_SELECTION _IOWR('V', 94, struct v4l2_selection)
#define VIDIOC_S_SELECTION _IOWR('V', 95, struct v4l2_selection)
+/* Experimental, these two ioctls may change over the next couple of kernel
+ versions. */
+#define VIDIOC_DECODER_CMD _IOWR('V', 96, struct v4l2_decoder_cmd)
+#define VIDIOC_TRY_DECODER_CMD _IOWR('V', 97, struct v4l2_decoder_cmd)
+
/* Reminder: when adding new ioctls please add support for them to
drivers/media/video/v4l2-compat-ioctl32.c as well! */