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Date: Mon, 18 Jun 2018 16:58:37 +0200
From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Marco Franchi <marco.franchi@....com>,
Icenowy Zheng <icenowy@...c.io>,
Hans Verkuil <hverkuil@...all.nl>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Tom Saeger <tom.saeger@...cle.com>,
Smitha T Murthy <smitha.t@...sung.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Andrzej Hajda <a.hajda@...sung.com>,
Jonathan Corbet <corbet@....net>,
"David S . Miller" <davem@...emloft.net>,
Andrew Morton <akpm@...ux-foundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Linus Walleij <linus.walleij@...aro.org>,
Randy Dunlap <rdunlap@...radead.org>,
Arnd Bergmann <arnd@...db.de>,
Stanimir Varbanov <stanimir.varbanov@...aro.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Ramesh Shanmugasundaram <ramesh.shanmugasundaram@...renesas.com>,
Jacob Chen <jacob-chen@...wrt.com>,
Steve Longerbeam <slongerbeam@...il.com>,
Todor Tomov <todor.tomov@...aro.org>,
Jacopo Mondi <jacopo+renesas@...ndi.org>,
Alexandre Courbot <acourbot@...omium.org>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Tomasz Figa <tfiga@...omium.org>,
Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
Hans de Goede <hdegoede@...hat.com>,
Sami Tolvanen <samitolvanen@...gle.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
linux-sunxi@...glegroups.com,
Hugues Fruchet <hugues.fruchet@...com>,
Randy Li <ayaka@...lik.info>
Subject: [PATCH v4 13/19] media: v4l: Add definitions for MPEG2 slice format and header metadata
Stateless video decoding engines require both the MPEG slices and
associated metadata from the video stream in order to decode frames.
This introduces definitions for a new pixel format, describing buffers
with MPEG2 slice data, as well as a control structure for passing the
frame header (metadata) to drivers.
This is based on work from both Florent Revest and Hugues Fruchet.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
diff --git a/Documentation/media/uapi/v4l/extended-controls.rst b/Documentation/media/uapi/v4l/extended-controls.rst
index 03931f9b1285..54f0dd396df2 100644
--- a/Documentation/media/uapi/v4l/extended-controls.rst
+++ b/Documentation/media/uapi/v4l/extended-controls.rst
@@ -1497,6 +1497,79 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
+.. _v4l2-mpeg-mpeg2:
+
+``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_HEADER (struct)``
+ Specifies the slice parameters (also known as slice header) for an
+ associated MPEG-2 slice data. This includes all the necessary
+ parameters for configuring a hardware decoder pipeline for MPEG-2.
+
+.. tabularcolumns:: |p{2.0cm}|p{4.0cm}|p{11.0cm}|
+
+.. c:type:: v4l2_ctrl_mpeg2_slice_header
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_mpeg2_slice_header
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 2
+
+ * - __u32
+ - ``slice_len``
+ - Length (in bits) of the current slice data.
+ * - __u32
+ - ``slice_pos``
+ - Position (in bits) of the current slice data, relative to the
+ frame start.
+ * - __u16
+ - ``width``
+ - Width of the corresponding output frame for the current slice.
+ * - __u16
+ - ``height``
+ - Height of the corresponding output frame for the current slice.
+ * - __u8
+ - ``picture_coding_type``
+ - Picture coding type for the frame covered by the current slice
+ (V4L2_SLICE_PCT_I, V4L2_SLICE_PCT_P or V4L2_SLICE_PCT_B).
+ * - __u8
+ - ``f_code[2][2]``
+ - Motion vector codes.
+ * - __u8
+ - ``intra_dc_precision``
+ - Precision of Discrete Cosine transform (0: 8 bits precision,
+ 1: 9 bits precision, 2: 10 bits precision, 11: 11 bits precision).
+ * - __u8
+ - ``picture_structure``
+ - Picture structure (1: interlaced top field,
+ 2: interlaced bottom field, 3: progressive frame).
+ * - __u8
+ - ``top_field_first``
+ - If set to 1 and interlaced stream, top field is output first.
+ * - __u8
+ - ``frame_pred_frame_dct``
+ - If set to 1, only frame-DCT and frame prediction are used.
+ * - __u8
+ - ``concealment_motion_vectors``
+ - If set to 1, motion vectors are coded for intra macroblocks.
+ * - __u8
+ - ``q_scale_type``
+ - This flag affects the inverse quantisation process.
+ * - __u8
+ - ``intra_vlc_format``
+ - This flag affects the decoding of transform coefficient data.
+ * - __u8
+ - ``alternate_scan``
+ - This flag affects the decoding of transform coefficient data.
+ * - __u8
+ - ``backward_ref_index``
+ - Index for the V4L2 buffer to use as backward reference, used with
+ B-coded and P-coded frames.
+ * - __u8
+ - ``forward_ref_index``
+ - Index for the V4L2 buffer to use as forward reference, used with
+ P-coded frames.
+ * - :cspan:`2`
MFC 5.1 MPEG Controls
---------------------
diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
index abec03937bb3..4e73f62b5163 100644
--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
@@ -60,6 +60,11 @@ Compressed Formats
- ``V4L2_PIX_FMT_MPEG2``
- 'MPG2'
- MPEG2 video elementary stream.
+ * .. _V4L2-PIX-FMT-MPEG2-SLICE:
+
+ - ``V4L2_PIX_FMT_MPEG2_SLICE``
+ - 'MG2S'
+ - MPEG2 parsed slice data, as extracted from the MPEG2 bitstream.
* .. _V4L2-PIX-FMT-MPEG4:
- ``V4L2_PIX_FMT_MPEG4``
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index a0c7a7fb2ff3..f46584e4d511 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -826,6 +826,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
+ case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_HEADER: return "MPEG2 Slice Header";
/* VPX controls */
case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
@@ -1271,6 +1272,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_RDS_TX_ALT_FREQS:
*type = V4L2_CTRL_TYPE_U32;
break;
+ case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_HEADER:
+ *type = V4L2_CTRL_TYPE_MPEG2_SLICE_HEADER;
+ break;
default:
*type = V4L2_CTRL_TYPE_INTEGER;
break;
@@ -1529,6 +1533,7 @@ static void std_log(const struct v4l2_ctrl *ctrl)
static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
union v4l2_ctrl_ptr ptr)
{
+ struct v4l2_ctrl_mpeg2_slice_header *p_mpeg2_slice_header;
size_t len;
u64 offset;
s64 val;
@@ -1591,6 +1596,42 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
return -ERANGE;
return 0;
+ case V4L2_CTRL_TYPE_MPEG2_SLICE_HEADER:
+ p_mpeg2_slice_header = ptr.p;
+
+ switch (p_mpeg2_slice_header->intra_dc_precision) {
+ case 0: /* 8 bits */
+ case 1: /* 9 bits */
+ case 11: /* 11 bits */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (p_mpeg2_slice_header->picture_structure) {
+ case 1: /* interlaced top field */
+ case 2: /* interlaced bottom field */
+ case 3: /* progressive */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (p_mpeg2_slice_header->picture_coding_type) {
+ case V4L2_SLICE_PCT_I:
+ case V4L2_SLICE_PCT_P:
+ case V4L2_SLICE_PCT_B:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (p_mpeg2_slice_header->backward_ref_index > VIDEO_MAX_FRAME ||
+ p_mpeg2_slice_header->forward_ref_index > VIDEO_MAX_FRAME)
+ return -EINVAL;
+
+ return 0;
+
default:
return -EINVAL;
}
@@ -2165,6 +2206,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
case V4L2_CTRL_TYPE_U32:
elem_size = sizeof(u32);
break;
+ case V4L2_CTRL_TYPE_MPEG2_SLICE_HEADER:
+ elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_header);
+ break;
default:
if (type < V4L2_CTRL_COMPOUND_TYPES)
elem_size = sizeof(s32);
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index eee04f29f1d3..98961d5acb1a 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1267,6 +1267,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_H263: descr = "H.263"; break;
case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
+ case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 parsed slice data"; break;
case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break;
case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 8d473c979b61..2caf1f03a293 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -557,6 +557,8 @@ enum v4l2_mpeg_video_mpeg4_profile {
};
#define V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (V4L2_CID_MPEG_BASE+407)
+#define V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_HEADER (V4L2_CID_MPEG_BASE+450)
+
/* Control IDs for VP8 streams
* Although VP8 is not part of MPEG we add these controls to the MPEG class
* as that class is already handling other video compression standards
@@ -1076,4 +1078,32 @@ enum v4l2_detect_md_mode {
#define V4L2_CID_DETECT_MD_THRESHOLD_GRID (V4L2_CID_DETECT_CLASS_BASE + 3)
#define V4L2_CID_DETECT_MD_REGION_GRID (V4L2_CID_DETECT_CLASS_BASE + 4)
+#define V4L2_SLICE_PCT_I 1
+#define V4L2_SLICE_PCT_P 2
+#define V4L2_SLICE_PCT_B 3
+#define V4L2_SLICE_PCT_D 4
+
+struct v4l2_ctrl_mpeg2_slice_header {
+ __u32 slice_len;
+ __u32 slice_pos;
+
+ __u16 width;
+ __u16 height;
+
+ __u8 picture_coding_type;
+ __u8 f_code[2][2];
+
+ __u8 intra_dc_precision;
+ __u8 picture_structure;
+ __u8 top_field_first;
+ __u8 frame_pred_frame_dct;
+ __u8 concealment_motion_vectors;
+ __u8 q_scale_type;
+ __u8 intra_vlc_format;
+ __u8 alternate_scan;
+
+ __u8 backward_ref_index;
+ __u8 forward_ref_index;
+};
+
#endif
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 1f6c4b52baae..5e950a6f20df 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -629,6 +629,7 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_H263 v4l2_fourcc('H', '2', '6', '3') /* H263 */
#define V4L2_PIX_FMT_MPEG1 v4l2_fourcc('M', 'P', 'G', '1') /* MPEG-1 ES */
#define V4L2_PIX_FMT_MPEG2 v4l2_fourcc('M', 'P', 'G', '2') /* MPEG-2 ES */
+#define V4L2_PIX_FMT_MPEG2_SLICE v4l2_fourcc('M', 'G', '2', 'S') /* MPEG-2 parsed slice data */
#define V4L2_PIX_FMT_MPEG4 v4l2_fourcc('M', 'P', 'G', '4') /* MPEG-4 part 2 ES */
#define V4L2_PIX_FMT_XVID v4l2_fourcc('X', 'V', 'I', 'D') /* Xvid */
#define V4L2_PIX_FMT_VC1_ANNEX_G v4l2_fourcc('V', 'C', '1', 'G') /* SMPTE 421M Annex G compliant stream */
@@ -1587,6 +1588,7 @@ struct v4l2_ext_control {
__u8 __user *p_u8;
__u16 __user *p_u16;
__u32 __user *p_u32;
+ struct v4l2_ctrl_mpeg2_slice_header __user *p_mpeg2_slice_header;
void __user *ptr;
};
} __attribute__ ((packed));
@@ -1632,6 +1634,7 @@ enum v4l2_ctrl_type {
V4L2_CTRL_TYPE_U8 = 0x0100,
V4L2_CTRL_TYPE_U16 = 0x0101,
V4L2_CTRL_TYPE_U32 = 0x0102,
+ V4L2_CTRL_TYPE_MPEG2_SLICE_HEADER = 0x0103,
};
/* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */
--
2.17.0
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