@@ -1636,14 +1636,6 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
* - __u32
- ``data_bit_offset``
- Offset (in bits) to the video data in the current slice data.
- * - struct :c:type:`v4l2_mpeg2_sequence`
- - ``sequence``
- - Structure with MPEG-2 sequence metadata, merging relevant fields from
- the sequence header and sequence extension parts of the bitstream.
- * - struct :c:type:`v4l2_mpeg2_picture`
- - ``picture``
- - Structure with MPEG-2 picture metadata, merging relevant fields from
- the picture header and picture coding extension parts of the bitstream.
* - __u64
- ``backward_ref_ts``
- Timestamp of the V4L2 capture buffer to use as backward reference, used
@@ -1661,14 +1653,28 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
* - __u32
- ``quantiser_scale_code``
- Code used to determine the quantization scale to use for the IDCT.
+ * - __u8
+ - ``reserved``
+ - Applications and drivers must set this to zero.
-.. c:type:: v4l2_mpeg2_sequence
+``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (struct)``
+ Specifies the sequence parameters (as extracted from the bitstream) for the
+ associated MPEG-2 slice data. This includes fields matching the syntax
+ elements from the sequence header and sequence extension parts of the
+ bitstream as specified by :ref:`mpeg2part2`.
+
+ .. note::
+
+ This compound control is not yet part of the public kernel API and
+ it is expected to change.
+
+.. c:type:: v4l2_ctrl_mpeg2_sequence
.. cssclass:: longtable
.. tabularcolumns:: |p{1.4cm}|p{6.5cm}|p{9.4cm}|
-.. flat-table:: struct v4l2_mpeg2_sequence
+.. flat-table:: struct v4l2_ctrl_mpeg2_sequence
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
@@ -1690,7 +1696,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
* - __u8
- ``chroma_format``
- The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
- * - __u32
+ * - __u8
- ``flags``
- See :ref:`MPEG-2 Sequence Flags <mpeg2_sequence_flags>`.
@@ -1710,7 +1716,18 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
- Indication that all the frames for the sequence are progressive instead
of interlaced.
-.. c:type:: v4l2_mpeg2_picture
+``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE (struct)``
+ Specifies the picture parameters (as extracted from the bitstream) for the
+ associated MPEG-2 slice data. This includes fields matching the syntax
+ elements from the picture header and picture coding extension parts of the
+ bitstream as specified by :ref:`mpeg2part2`.
+
+ .. note::
+
+ This compound control is not yet part of the public kernel API and
+ it is expected to change.
+
+.. c:type:: v4l2_ctrl_mpeg2_picture
.. raw:: latex
@@ -1720,30 +1737,33 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
.. tabularcolumns:: |p{1.0cm}|p{5.6cm}|p{10.7cm}|
-.. flat-table:: struct v4l2_mpeg2_picture
+.. flat-table:: struct v4l2_ctrl_mpeg2_picture
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
+ * - __u32
+ - ``flags``
+ - See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
+ * - __u8
+ - ``f_code[2][2]``
+ - Motion vector codes.
* - __u8
- ``picture_coding_type``
- Picture coding type for the frame covered by the current slice
(V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
V4L2_MPEG2_PICTURE_CODING_TYPE_B).
* - __u8
- - ``f_code[2][2]``
- - Motion vector codes.
+ - ``picture_structure``
+ - Picture structure (1: interlaced top field, 2: interlaced bottom field,
+ 3: progressive frame).
* - __u8
- ``intra_dc_precision``
- Precision of Discrete Cosine transform (0: 8 bits precision,
1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
* - __u8
- - ``picture_structure``
- - Picture structure (1: interlaced top field, 2: interlaced bottom field,
- 3: progressive frame).
- * - __u32
- - ``flags``
- - See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
+ - ``reserved``
+ - Applications and drivers must set this to zero.
.. _mpeg2_picture_flags:
@@ -114,8 +114,9 @@ Compressed Formats
This format is adapted for stateless video decoders that implement a
MPEG-2 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
Metadata associated with the frame to decode is required to be passed
- through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS`` control and
- quantisation matrices can optionally be specified through the
+ through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE``,
+ ``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE``, and ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS``
+ controls. Quantisation matrices can optionally be specified through the
``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION`` control.
See the :ref:`associated Codec Control IDs <v4l2-mpeg-mpeg2>`.
Exactly one output and one capture buffer must be provided for use with
@@ -429,6 +429,18 @@ See also the examples in :ref:`control`.
- n/a
- A struct :c:type:`v4l2_ctrl_mpeg2_quantisation`, containing MPEG-2
quantisation matrices for stateless video decoders.
+ * - ``V4L2_CTRL_TYPE_MPEG2_SEQUENCE``
+ - n/a
+ - n/a
+ - n/a
+ - A struct :c:type:`v4l2_ctrl_mpeg2_sequence`, containing MPEG-2
+ sequence parameters for stateless video decoders.
+ * - ``V4L2_CTRL_TYPE_MPEG2_PICTURE``
+ - n/a
+ - n/a
+ - n/a
+ - A struct :c:type:`v4l2_ctrl_mpeg2_picture`, containing MPEG-2
+ picture parameters for stateless video decoders.
* - ``V4L2_CTRL_TYPE_AREA``
- n/a
- n/a
@@ -134,6 +134,8 @@ replace symbol V4L2_CTRL_TYPE_STRING :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_U16 :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_U32 :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_U8 :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_MPEG2_SEQUENCE :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_MPEG2_PICTURE :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_MPEG2_QUANTISATION :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_H264_SPS :c:type:`v4l2_ctrl_type`
@@ -977,6 +977,8 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_LTR_COUNT: return "LTR Count";
case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX: return "Frame LTR Index";
case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES: return "Use LTR Frames";
+ case V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE: return "MPEG-2 Sequence Header";
+ case V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE: return "MPEG-2 Picture Header";
case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION: return "MPEG-2 Quantisation Matrices";
case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";
@@ -1499,6 +1501,12 @@ 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_SEQUENCE:
+ *type = V4L2_CTRL_TYPE_MPEG2_SEQUENCE;
+ break;
+ case V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE:
+ *type = V4L2_CTRL_TYPE_MPEG2_PICTURE;
+ break;
case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:
*type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS;
break;
@@ -1703,7 +1711,8 @@ static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
union v4l2_ctrl_ptr ptr)
{
- struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
+ struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
+ struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
struct v4l2_ctrl_mpeg2_quantisation *p_mpeg2_quant;
struct v4l2_ctrl_vp8_frame *p_vp8_frame;
struct v4l2_ctrl_fwht_params *p_fwht_params;
@@ -1720,13 +1729,18 @@ static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
* v4l2_ctrl_type enum.
*/
switch ((u32)ctrl->type) {
- case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
- p_mpeg2_slice_params = p;
+ case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
+ p_mpeg2_sequence = p;
+
/* 4:2:0 */
- p_mpeg2_slice_params->sequence.chroma_format = 1;
+ p_mpeg2_sequence->chroma_format = 1;
+ break;
+ case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+ p_mpeg2_picture = p;
+
/* interlaced top field */
- p_mpeg2_slice_params->picture.picture_structure = 1;
- p_mpeg2_slice_params->picture.picture_coding_type =
+ p_mpeg2_picture->picture_structure = V4L2_MPEG2_PIC_TOP_FIELD;
+ p_mpeg2_picture->picture_coding_type =
V4L2_MPEG2_PIC_CODING_TYPE_I;
break;
case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
@@ -1909,6 +1923,8 @@ static void std_log(const struct v4l2_ctrl *ctrl)
static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
union v4l2_ctrl_ptr ptr)
{
+ struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
+ struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
struct v4l2_ctrl_vp8_frame *p_vp8_frame;
struct v4l2_ctrl_fwht_params *p_fwht_params;
@@ -1926,10 +1942,10 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
unsigned int i;
switch ((u32)ctrl->type) {
- case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
- p_mpeg2_slice_params = p;
+ case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
+ p_mpeg2_sequence = p;
- switch (p_mpeg2_slice_params->sequence.chroma_format) {
+ switch (p_mpeg2_sequence->chroma_format) {
case 1: /* 4:2:0 */
case 2: /* 4:2:2 */
case 3: /* 4:4:4 */
@@ -1937,8 +1953,12 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
default:
return -EINVAL;
}
+ break;
+
+ case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+ p_mpeg2_picture = p;
- switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
+ switch (p_mpeg2_picture->intra_dc_precision) {
case 0: /* 8 bits */
case 1: /* 9 bits */
case 2: /* 10 bits */
@@ -1948,7 +1968,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
return -EINVAL;
}
- switch (p_mpeg2_slice_params->picture.picture_structure) {
+ switch (p_mpeg2_picture->picture_structure) {
case V4L2_MPEG2_PIC_TOP_FIELD:
case V4L2_MPEG2_PIC_BOTTOM_FIELD:
case V4L2_MPEG2_PIC_FRAME:
@@ -1957,7 +1977,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
return -EINVAL;
}
- switch (p_mpeg2_slice_params->picture.picture_coding_type) {
+ switch (p_mpeg2_picture->picture_coding_type) {
case V4L2_MPEG2_PIC_CODING_TYPE_I:
case V4L2_MPEG2_PIC_CODING_TYPE_P:
case V4L2_MPEG2_PIC_CODING_TYPE_B:
@@ -1965,7 +1985,13 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
default:
return -EINVAL;
}
+ zero_reserved(*p_mpeg2_picture);
+ break;
+ case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
+ p_mpeg2_slice_params = p;
+
+ zero_reserved(*p_mpeg2_slice_params);
break;
case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
@@ -2934,6 +2960,12 @@ 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_SEQUENCE:
+ elem_size = sizeof(struct v4l2_ctrl_mpeg2_sequence);
+ break;
+ case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+ elem_size = sizeof(struct v4l2_ctrl_mpeg2_picture);
+ break;
case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params);
break;
@@ -286,6 +286,16 @@ static const struct hantro_ctrl controls[] = {
.def = 50,
.ops = &hantro_jpeg_ctrl_ops,
},
+ }, {
+ .codec = HANTRO_MPEG2_DECODER,
+ .cfg = {
+ .id = V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE,
+ },
+ }, {
+ .codec = HANTRO_MPEG2_DECODER,
+ .cfg = {
+ .id = V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE,
+ },
}, {
.codec = HANTRO_MPEG2_DECODER,
.cfg = {
@@ -92,8 +92,8 @@ static void
hantro_g1_mpeg2_dec_set_buffers(struct hantro_dev *vpu, struct hantro_ctx *ctx,
struct vb2_buffer *src_buf,
struct vb2_buffer *dst_buf,
- const struct v4l2_mpeg2_sequence *seq,
- const struct v4l2_mpeg2_picture *pic,
+ const struct v4l2_ctrl_mpeg2_sequence *seq,
+ const struct v4l2_ctrl_mpeg2_picture *pic,
const struct v4l2_ctrl_mpeg2_slice_params *slice_params)
{
dma_addr_t forward_addr = 0, backward_addr = 0;
@@ -153,8 +153,8 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
struct hantro_dev *vpu = ctx->dev;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
- const struct v4l2_mpeg2_sequence *seq;
- const struct v4l2_mpeg2_picture *pic;
+ const struct v4l2_ctrl_mpeg2_sequence *seq;
+ const struct v4l2_ctrl_mpeg2_picture *pic;
u32 reg;
src_buf = hantro_get_src_buf(ctx);
@@ -165,8 +165,10 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
slice_params = hantro_get_ctrl(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS);
- seq = &slice_params->sequence;
- pic = &slice_params->picture;
+ seq = hantro_get_ctrl(ctx,
+ V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
+ pic = hantro_get_ctrl(ctx,
+ V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
reg = G1_REG_DEC_AXI_RD_ID(0) |
G1_REG_DEC_TIMEOUT_E(1) |
@@ -95,8 +95,8 @@ rk3399_vpu_mpeg2_dec_set_buffers(struct hantro_dev *vpu,
struct hantro_ctx *ctx,
struct vb2_buffer *src_buf,
struct vb2_buffer *dst_buf,
- const struct v4l2_mpeg2_sequence *seq,
- const struct v4l2_mpeg2_picture *pic,
+ const struct v4l2_ctrl_mpeg2_sequence *seq,
+ const struct v4l2_ctrl_mpeg2_picture *pic,
const struct v4l2_ctrl_mpeg2_slice_params *slice_params)
{
dma_addr_t forward_addr = 0, backward_addr = 0;
@@ -156,8 +156,8 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
struct hantro_dev *vpu = ctx->dev;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
- const struct v4l2_mpeg2_sequence *seq;
- const struct v4l2_mpeg2_picture *pic;
+ const struct v4l2_ctrl_mpeg2_sequence *seq;
+ const struct v4l2_ctrl_mpeg2_picture *pic;
u32 reg;
src_buf = hantro_get_src_buf(ctx);
@@ -167,8 +167,10 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
slice_params = hantro_get_ctrl(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS);
- seq = &slice_params->sequence;
- pic = &slice_params->picture;
+ seq = hantro_get_ctrl(ctx,
+ V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
+ pic = hantro_get_ctrl(ctx,
+ V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
reg = VDPU_REG_DEC_ADV_PRE_DIS(0) |
VDPU_REG_DEC_SCMD_DIS(0) |
@@ -29,6 +29,18 @@
#include "cedrus_hw.h"
static const struct cedrus_control cedrus_controls[] = {
+ {
+ .cfg = {
+ .id = V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE,
+ },
+ .codec = CEDRUS_CODEC_MPEG2,
+ },
+ {
+ .cfg = {
+ .id = V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE,
+ },
+ .codec = CEDRUS_CODEC_MPEG2,
+ },
{
.cfg = {
.id = V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
@@ -68,6 +68,8 @@ struct cedrus_h264_run {
};
struct cedrus_mpeg2_run {
+ const struct v4l2_ctrl_mpeg2_sequence *sequence;
+ const struct v4l2_ctrl_mpeg2_picture *picture;
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
const struct v4l2_ctrl_mpeg2_quantisation *quantisation;
};
@@ -40,6 +40,10 @@ void cedrus_device_run(void *priv)
switch (ctx->src_fmt.pixelformat) {
case V4L2_PIX_FMT_MPEG2_SLICE:
+ run.mpeg2.sequence = cedrus_find_control_data(ctx,
+ V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
+ run.mpeg2.picture = cedrus_find_control_data(ctx,
+ V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
run.mpeg2.slice_params = cedrus_find_control_data(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS);
run.mpeg2.quantisation = cedrus_find_control_data(ctx,
@@ -51,8 +51,8 @@ static void cedrus_mpeg2_irq_disable(struct cedrus_ctx *ctx)
static void cedrus_mpeg2_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
{
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
- const struct v4l2_mpeg2_sequence *seq;
- const struct v4l2_mpeg2_picture *pic;
+ const struct v4l2_ctrl_mpeg2_sequence *seq;
+ const struct v4l2_ctrl_mpeg2_picture *pic;
const struct v4l2_ctrl_mpeg2_quantisation *quantisation;
dma_addr_t src_buf_addr, dst_luma_addr, dst_chroma_addr;
dma_addr_t fwd_luma_addr, fwd_chroma_addr;
@@ -66,8 +66,8 @@ static void cedrus_mpeg2_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
u32 reg;
slice_params = run->mpeg2.slice_params;
- seq = &slice_params->sequence;
- pic = &slice_params->picture;
+ seq = run->mpeg2.sequence;
+ pic = run->mpeg2.picture;
quantisation = run->mpeg2.quantisation;
@@ -13,24 +13,44 @@
#define V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (V4L2_CID_CODEC_BASE+250)
#define V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION (V4L2_CID_CODEC_BASE+251)
+#define V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (V4L2_CID_CODEC_BASE+252)
+#define V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE (V4L2_CID_CODEC_BASE+253)
/* enum v4l2_ctrl_type type values */
-#define V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS 0x0103
-#define V4L2_CTRL_TYPE_MPEG2_QUANTISATION 0x0104
+#define V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS 0x0130
+#define V4L2_CTRL_TYPE_MPEG2_QUANTISATION 0x0131
+#define V4L2_CTRL_TYPE_MPEG2_SEQUENCE 0x0132
+#define V4L2_CTRL_TYPE_MPEG2_PICTURE 0x0133
#define V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE 0x0001
-struct v4l2_mpeg2_sequence {
- /* ISO/IEC 13818-2, ITU-T Rec. H.262: Sequence header */
+/**
+ * struct v4l2_ctrl_mpeg2_sequence - MPEG-2 sequence header
+ *
+ * All the members on this structure match the sequence header and sequence
+ * extension syntaxes as specified by the MPEG-2 specification.
+ *
+ * Fields horizontal_size, vertical_size and vbv_buffer_size are a
+ * combination of respective _value and extension syntax elements,
+ * as described in section 6.3.3 "Sequence header".
+ *
+ * @horizontal_size: combination of elements horizontal_size_value and
+ * horizontal_size_extension.
+ * @vertical_size: combination of elements vertical_size_value and
+ * vertical_size_extension.
+ * @vbv_buffer_size: combination of elements vbv_buffer_size_value and
+ * vbv_buffer_size_extension.
+ * @profile_and_level_indication: see MPEG-2 specification.
+ * @chroma_format: see MPEG-2 specification.
+ * @flags: see V4L2_MPEG2_SEQ_FLAG_{}.
+ */
+struct v4l2_ctrl_mpeg2_sequence {
__u16 horizontal_size;
__u16 vertical_size;
__u32 vbv_buffer_size;
-
- /* ISO/IEC 13818-2, ITU-T Rec. H.262: Sequence extension */
__u16 profile_and_level_indication;
__u8 chroma_format;
-
- __u32 flags;
+ __u8 flags;
};
#define V4L2_MPEG2_PIC_CODING_TYPE_I 1
@@ -51,33 +71,72 @@ struct v4l2_mpeg2_sequence {
#define V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST 0x0040
#define V4L2_MPEG2_PIC_FLAG_PROGRESSIVE 0x0080
-struct v4l2_mpeg2_picture {
- /* ISO/IEC 13818-2, ITU-T Rec. H.262: Picture header */
- __u8 picture_coding_type;
-
- /* ISO/IEC 13818-2, ITU-T Rec. H.262: Picture coding extension */
+/**
+ * struct v4l2_ctrl_mpeg2_picture - MPEG-2 picture header
+ *
+ * All the members on this structure match the picture header and picture
+ * coding extension syntaxes as specified by the MPEG-2 specification.
+ *
+ * @flags: see V4L2_MPEG2_PIC_FLAG_{}.
+ * @f_code[2][2]: see MPEG-2 specification.
+ * @picture_coding_type: see MPEG-2 specification.
+ * @picture_structure: see V4L2_MPEG2_PIC_{}_FIELD.
+ * @intra_dc_precision: see MPEG-2 specification.
+ * @reserved: padding field. Should be zeroed by applications.
+ */
+struct v4l2_ctrl_mpeg2_picture {
+ __u32 flags;
__u8 f_code[2][2];
- __u8 intra_dc_precision;
+ __u8 picture_coding_type;
__u8 picture_structure;
-
- __u32 flags;
+ __u8 intra_dc_precision;
+ __u8 reserved;
};
+/**
+ * struct v4l2_ctrl_mpeg2_slice_params - MPEG-2 slice header
+ *
+ * @backward_ref_ts: timestamp of the V4L2 capture buffer to use as
+ * reference for backward prediction.
+ * @forward_ref_ts: timestamp of the V4L2 capture buffer to use as
+ * reference for forward prediction. These timestamp refers to the
+ * timestamp field in struct v4l2_buffer. Use v4l2_timeval_to_ns()
+ * to convert the struct timeval to a __u64.
+ * @quantiser_scale_code: quantiser scale integer matching an
+ * homonymous syntax element.
+ * @reserved: padding field. Should be zeroed by applications.
+ */
struct v4l2_ctrl_mpeg2_slice_params {
__u32 bit_size;
__u32 data_bit_offset;
__u64 backward_ref_ts;
__u64 forward_ref_ts;
-
- struct v4l2_mpeg2_sequence sequence;
- struct v4l2_mpeg2_picture picture;
-
- /* ISO/IEC 13818-2, ITU-T Rec. H.262: Slice */
__u32 quantiser_scale_code;
+ __u32 reserved;
};
+/**
+ * struct v4l2_ctrl_mpeg2_quantisation - MPEG-2 quantisation
+ *
+ * Quantization matrices as specified by section 6.3.7
+ * "Quant matrix extension".
+ *
+ * @intra_quantiser_matrix: The quantisation matrix coefficients
+ * for intra-coded frames, in zigzag scanning order. It is relevant
+ * for both luma and chroma components, although it can be superseded
+ * by the chroma-specific matrix for non-4:2:0 YUV formats.
+ * @non_intra_quantiser_matrix: The quantisation matrix coefficients
+ * for non-intra-coded frames, in zigzag scanning order. It is relevant
+ * for both luma and chroma components, although it can be superseded
+ * by the chroma-specific matrix for non-4:2:0 YUV formats.
+ * @chroma_intra_quantiser_matrix: The quantisation matrix coefficients
+ * for the chominance component of intra-coded frames, in zigzag scanning
+ * order. Only relevant for 4:2:2 and 4:4:4 YUV formats.
+ * @chroma_non_intra_quantiser_matrix: The quantisation matrix coefficients
+ * for the chrominance component of non-intra-coded frames, in zigzag scanning
+ * order. Only relevant for 4:2:2 and 4:4:4 YUV formats.
+ */
struct v4l2_ctrl_mpeg2_quantisation {
- /* ISO/IEC 13818-2, ITU-T Rec. H.262: Quant matrix extension */
__u8 intra_quantiser_matrix[64];
__u8 non_intra_quantiser_matrix[64];
__u8 chroma_intra_quantiser_matrix[64];
@@ -40,6 +40,8 @@ struct video_device;
* @p_u16: Pointer to a 16-bit unsigned value.
* @p_u32: Pointer to a 32-bit unsigned value.
* @p_char: Pointer to a string.
+ * @p_mpeg2_sequence: Pointer to a MPEG2 sequence structure.
+ * @p_mpeg2_picture: Pointer to a MPEG2 picture structure.
* @p_mpeg2_slice_params: Pointer to a MPEG2 slice parameters structure.
* @p_mpeg2_quantisation: Pointer to a MPEG2 quantisation data structure.
* @p_fwht_params: Pointer to a FWHT stateless parameters structure.
@@ -66,6 +68,8 @@ union v4l2_ctrl_ptr {
u16 *p_u16;
u32 *p_u32;
char *p_char;
+ struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
+ struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
struct v4l2_ctrl_mpeg2_quantisation *p_mpeg2_quantisation;
struct v4l2_ctrl_fwht_params *p_fwht_params;
Typically, bitstreams are composed of a sequence header, followed by a number of picture header and picture coding extension headers. Each picture can be composed of a number of slices. Let's split the MPEG-2 uAPI to follow these semantics more closely, allowing more usage flexibility. Having these controls split up allows applications to set a sequence control at the beginning of a sequence, and then set a picture control for each frame. While here add padding fields where needed, and document the uAPI header thoroughly. Note that the V4L2_CTRL_TYPE_{} defines had to be moved because it clashes with existing ones. This is not really an issue since they will be re-defined when the controls are moved out of staging. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Tested-by: Jonas Karlman <jonas@kwiboo.se> --- .../media/v4l/ext-ctrls-codec.rst | 62 +++++++---- .../media/v4l/pixfmt-compressed.rst | 5 +- .../media/v4l/vidioc-queryctrl.rst | 12 ++ .../media/videodev2.h.rst.exceptions | 2 + drivers/media/v4l2-core/v4l2-ctrls.c | 56 ++++++++-- drivers/staging/media/hantro/hantro_drv.c | 10 ++ .../media/hantro/hantro_g1_mpeg2_dec.c | 14 ++- .../media/hantro/rk3399_vpu_hw_mpeg2_dec.c | 14 ++- drivers/staging/media/sunxi/cedrus/cedrus.c | 12 ++ drivers/staging/media/sunxi/cedrus/cedrus.h | 2 + .../staging/media/sunxi/cedrus/cedrus_dec.c | 4 + .../staging/media/sunxi/cedrus/cedrus_mpeg2.c | 8 +- include/media/mpeg2-ctrls.h | 103 ++++++++++++++---- include/media/v4l2-ctrls.h | 4 + 14 files changed, 235 insertions(+), 73 deletions(-)