[PATCH v11 2/4] media: pixfmt: Add H264 Slice format

Paul Kocialkowski paul.kocialkowski at bootlin.com
Fri May 24 09:20:29 UTC 2019


From: Maxime Ripard <maxime.ripard at bootlin.com>

The H264_SLICE_RAW format is meant to hold the parsed slice data without
the start code. This will be needed by stateless decoders.

Signed-off-by: Maxime Ripard <maxime.ripard at bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco at xs4all.nl>
---
 drivers/media/v4l2-core/v4l2-ioctl.c |   1 +
 include/media/h264-ctrls.h           | 197 +++++++++++++++++++++++++++
 2 files changed, 198 insertions(+)
 create mode 100644 include/media/h264-ctrls.h

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index ac87c3e37280..f6e1254064d2 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1325,6 +1325,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
 		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
 		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
+		case V4L2_PIX_FMT_H264_SLICE_RAW:	descr = "H.264 Parsed Slice Data"; break;
 		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;
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
new file mode 100644
index 000000000000..e1404d78d6ff
--- /dev/null
+++ b/include/media/h264-ctrls.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * These are the H.264 state controls for use with stateless H.264
+ * codec drivers.
+ *
+ * It turns out that these structs are not stable yet and will undergo
+ * more changes. So keep them private until they are stable and ready to
+ * become part of the official public API.
+ */
+
+#ifndef _H264_CTRLS_H_
+#define _H264_CTRLS_H_
+
+#include <linux/videodev2.h>
+
+/* Our pixel format isn't stable at the moment */
+#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
+
+/*
+ * This is put insanely high to avoid conflicting with controls that
+ * would be added during the phase where those controls are not
+ * stable. It should be fixed eventually.
+ */
+#define V4L2_CID_MPEG_VIDEO_H264_SPS		(V4L2_CID_MPEG_BASE+1000)
+#define V4L2_CID_MPEG_VIDEO_H264_PPS		(V4L2_CID_MPEG_BASE+1001)
+#define V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX	(V4L2_CID_MPEG_BASE+1002)
+#define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS	(V4L2_CID_MPEG_BASE+1003)
+#define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS	(V4L2_CID_MPEG_BASE+1004)
+
+/* enum v4l2_ctrl_type type values */
+#define V4L2_CTRL_TYPE_H264_SPS			0x0110
+#define V4L2_CTRL_TYPE_H264_PPS			0x0111
+#define V4L2_CTRL_TYPE_H264_SCALING_MATRIX	0x0112
+#define V4L2_CTRL_TYPE_H264_SLICE_PARAMS	0x0113
+#define V4L2_CTRL_TYPE_H264_DECODE_PARAMS	0x0114
+
+#define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG			0x01
+#define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG			0x02
+#define V4L2_H264_SPS_CONSTRAINT_SET2_FLAG			0x04
+#define V4L2_H264_SPS_CONSTRAINT_SET3_FLAG			0x08
+#define V4L2_H264_SPS_CONSTRAINT_SET4_FLAG			0x10
+#define V4L2_H264_SPS_CONSTRAINT_SET5_FLAG			0x20
+
+#define V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE		0x01
+#define V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS	0x02
+#define V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO		0x04
+#define V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED	0x08
+#define V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY			0x10
+#define V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD		0x20
+#define V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE			0x40
+
+struct v4l2_ctrl_h264_sps {
+	__u8 profile_idc;
+	__u8 constraint_set_flags;
+	__u8 level_idc;
+	__u8 seq_parameter_set_id;
+	__u8 chroma_format_idc;
+	__u8 bit_depth_luma_minus8;
+	__u8 bit_depth_chroma_minus8;
+	__u8 log2_max_frame_num_minus4;
+	__u8 pic_order_cnt_type;
+	__u8 log2_max_pic_order_cnt_lsb_minus4;
+	__u8 max_num_ref_frames;
+	__u8 num_ref_frames_in_pic_order_cnt_cycle;
+	__s32 offset_for_ref_frame[255];
+	__s32 offset_for_non_ref_pic;
+	__s32 offset_for_top_to_bottom_field;
+	__u16 pic_width_in_mbs_minus1;
+	__u16 pic_height_in_map_units_minus1;
+	__u32 flags;
+};
+
+#define V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE				0x0001
+#define V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT	0x0002
+#define V4L2_H264_PPS_FLAG_WEIGHTED_PRED				0x0004
+#define V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT		0x0008
+#define V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED			0x0010
+#define V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT			0x0020
+#define V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE				0x0040
+#define V4L2_H264_PPS_FLAG_PIC_SCALING_MATRIX_PRESENT			0x0080
+
+struct v4l2_ctrl_h264_pps {
+	__u8 pic_parameter_set_id;
+	__u8 seq_parameter_set_id;
+	__u8 num_slice_groups_minus1;
+	__u8 num_ref_idx_l0_default_active_minus1;
+	__u8 num_ref_idx_l1_default_active_minus1;
+	__u8 weighted_bipred_idc;
+	__s8 pic_init_qp_minus26;
+	__s8 pic_init_qs_minus26;
+	__s8 chroma_qp_index_offset;
+	__s8 second_chroma_qp_index_offset;
+	__u16 flags;
+};
+
+struct v4l2_ctrl_h264_scaling_matrix {
+	__u8 scaling_list_4x4[6][16];
+	__u8 scaling_list_8x8[6][64];
+};
+
+struct v4l2_h264_weight_factors {
+	__s16 luma_weight[32];
+	__s16 luma_offset[32];
+	__s16 chroma_weight[32][2];
+	__s16 chroma_offset[32][2];
+};
+
+struct v4l2_h264_pred_weight_table {
+	__u16 luma_log2_weight_denom;
+	__u16 chroma_log2_weight_denom;
+	struct v4l2_h264_weight_factors weight_factors[2];
+};
+
+#define V4L2_H264_SLICE_TYPE_P				0
+#define V4L2_H264_SLICE_TYPE_B				1
+#define V4L2_H264_SLICE_TYPE_I				2
+#define V4L2_H264_SLICE_TYPE_SP				3
+#define V4L2_H264_SLICE_TYPE_SI				4
+
+#define V4L2_H264_SLICE_FLAG_FIELD_PIC			0x01
+#define V4L2_H264_SLICE_FLAG_BOTTOM_FIELD		0x02
+#define V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED	0x04
+#define V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH		0x08
+
+struct v4l2_ctrl_h264_slice_params {
+	/* Size in bytes, including header */
+	__u32 size;
+	/* Offset in bits to slice_data() from the beginning of this slice. */
+	__u32 header_bit_size;
+
+	__u16 first_mb_in_slice;
+	__u8 slice_type;
+	__u8 pic_parameter_set_id;
+	__u8 colour_plane_id;
+	__u8 redundant_pic_cnt;
+	__u16 frame_num;
+	__u16 idr_pic_id;
+	__u16 pic_order_cnt_lsb;
+	__s32 delta_pic_order_cnt_bottom;
+	__s32 delta_pic_order_cnt0;
+	__s32 delta_pic_order_cnt1;
+
+	struct v4l2_h264_pred_weight_table pred_weight_table;
+	/* Size in bits of dec_ref_pic_marking() syntax element. */
+	__u32 dec_ref_pic_marking_bit_size;
+	/* Size in bits of pic order count syntax. */
+	__u32 pic_order_cnt_bit_size;
+
+	__u8 cabac_init_idc;
+	__s8 slice_qp_delta;
+	__s8 slice_qs_delta;
+	__u8 disable_deblocking_filter_idc;
+	__s8 slice_alpha_c0_offset_div2;
+	__s8 slice_beta_offset_div2;
+	__u8 num_ref_idx_l0_active_minus1;
+	__u8 num_ref_idx_l1_active_minus1;
+	__u32 slice_group_change_cycle;
+
+	/*
+	 * Entries on each list are indices into
+	 * v4l2_ctrl_h264_decode_params.dpb[].
+	 */
+	__u8 ref_pic_list0[32];
+	__u8 ref_pic_list1[32];
+
+	__u32 flags;
+};
+
+#define V4L2_H264_DPB_ENTRY_FLAG_VALID		0x01
+#define V4L2_H264_DPB_ENTRY_FLAG_ACTIVE		0x02
+#define V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM	0x04
+
+struct v4l2_h264_dpb_entry {
+	__u64 reference_ts;
+	__u16 frame_num;
+	__u16 pic_num;
+	/* Note that field is indicated by v4l2_buffer.field */
+	__s32 top_field_order_cnt;
+	__s32 bottom_field_order_cnt;
+	__u32 flags; /* V4L2_H264_DPB_ENTRY_FLAG_* */
+};
+
+#define V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC	0x01
+
+struct v4l2_ctrl_h264_decode_params {
+	struct v4l2_h264_dpb_entry dpb[16];
+	__u16 num_slices;
+	__u16 nal_ref_idc;
+	__u8 ref_pic_list_p0[32];
+	__u8 ref_pic_list_b0[32];
+	__u8 ref_pic_list_b1[32];
+	__s32 top_field_order_cnt;
+	__s32 bottom_field_order_cnt;
+	__u32 flags; /* V4L2_H264_DECODE_PARAM_FLAG_* */
+};
+
+#endif
-- 
2.21.0



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