Re: [RFC 08/12] media: hantro: Fix H264 decoding of field encoded content

From: Philipp Zabel
Date: Tue Sep 03 2019 - 09:21:59 EST

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In reply to: Jonas Karlman: "[RFC 08/12] media: hantro: Fix H264 decoding of field encoded content"
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On Sun, 2019-09-01 at 12:45 +0000, Jonas Karlman wrote:
> This need code cleanup and formatting
>
> Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>

The previous patches all work, but this patch breaks decoding of
progressive content for me (i.MX8MQ with FFmpeg based on Ezequiel's
branch).

regards
Philipp

> ---
> .../staging/media/hantro/hantro_g1_h264_dec.c | 26 ++--
> drivers/staging/media/hantro/hantro_h264.c | 126 ++++++++++++------
> drivers/staging/media/hantro/hantro_hw.h | 4 +
> 3 files changed, 100 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/staging/media/hantro/hantro_g1_h264_dec.c b/drivers/staging/media/hantro/hantro_g1_h264_dec.c
> index 16f21d258f6a..bc628ef73b29 100644
> --- a/drivers/staging/media/hantro/hantro_g1_h264_dec.c
> +++ b/drivers/staging/media/hantro/hantro_g1_h264_dec.c
> @@ -130,28 +130,20 @@ static void set_params(struct hantro_ctx *ctx)
>
> static void set_ref(struct hantro_ctx *ctx)
> {
> + const struct v4l2_ctrl_h264_decode_params *dec_param;
> + const struct v4l2_ctrl_h264_slice_params *slice;
> struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
> const u8 *b0_reflist, *b1_reflist, *p_reflist;
> struct hantro_dev *vpu = ctx->dev;
> - u32 dpb_longterm = 0;
> - u32 dpb_valid = 0;
> int reg_num;
> u32 reg;
> int i;
>
> - /*
> - * Set up bit maps of valid and long term DPBs.
> - * NOTE: The bits are reversed, i.e. MSb is DPB 0.
> - */
> - for (i = 0; i < HANTRO_H264_DPB_SIZE; ++i) {
> - if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE)
> - dpb_valid |= BIT(HANTRO_H264_DPB_SIZE - 1 - i);
> + dec_param = ctx->h264_dec.ctrls.decode;
> + slice = ctx->h264_dec.ctrls.slices;
>
> - if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
> - dpb_longterm |= BIT(HANTRO_H264_DPB_SIZE - 1 - i);
> - }
> - vdpu_write_relaxed(vpu, dpb_valid << 16, G1_REG_VALID_REF);
> - vdpu_write_relaxed(vpu, dpb_longterm << 16, G1_REG_LT_REF);
> + vdpu_write_relaxed(vpu, ctx->h264_dec.dpb_valid, G1_REG_VALID_REF);
> + vdpu_write_relaxed(vpu, ctx->h264_dec.dpb_longterm, G1_REG_LT_REF);
>
> /*
> * Set up reference frame picture numbers.
> @@ -223,10 +215,8 @@ static void set_ref(struct hantro_ctx *ctx)
>
> /* Set up addresses of DPB buffers. */
> for (i = 0; i < HANTRO_H264_DPB_SIZE; i++) {
> - struct vb2_buffer *buf = hantro_h264_get_ref_buf(ctx, i);
> -
> - vdpu_write_relaxed(vpu, vb2_dma_contig_plane_dma_addr(buf, 0),
> - G1_REG_ADDR_REF(i));
> + dma_addr_t addr = hantro_h264_get_ref_dma_addr(ctx, i);
> + vdpu_write_relaxed(vpu, addr, G1_REG_ADDR_REF(i));
> }
> }
>
> diff --git a/drivers/staging/media/hantro/hantro_h264.c b/drivers/staging/media/hantro/hantro_h264.c
> index a77cc28e180a..85c86d728b1a 100644
> --- a/drivers/staging/media/hantro/hantro_h264.c
> +++ b/drivers/staging/media/hantro/hantro_h264.c
> @@ -228,17 +228,65 @@ static void prepare_table(struct hantro_ctx *ctx)
> {
> const struct hantro_h264_dec_ctrls *ctrls = &ctx->h264_dec.ctrls;
> const struct v4l2_ctrl_h264_decode_params *dec_param = ctrls->decode;
> + const struct v4l2_ctrl_h264_slice_params *slices = ctrls->slices;
> struct hantro_h264_dec_priv_tbl *tbl = ctx->h264_dec.priv.cpu;
> const struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
> + u32 dpb_longterm = 0;
> + u32 dpb_valid = 0;
> int i;
>
> + /*
> + * Set up bit maps of valid and long term DPBs.
> + * NOTE: The bits are reversed, i.e. MSb is DPB 0.
> + */
> + if ((slices[0].flags & V4L2_H264_SLICE_FLAG_FIELD_PIC) || (slices[0].flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD)) {
> + for (i = 0; i < HANTRO_H264_DPB_SIZE * 2; ++i) {
> + // check for correct reference use
> + u32 flag = (i & 0x1) ? V4L2_H264_DPB_ENTRY_FLAG_REF_BOTTOM : V4L2_H264_DPB_ENTRY_FLAG_REF_TOP;
> + if (dpb[i / 2].flags & flag)
> + dpb_valid |= BIT(HANTRO_H264_DPB_SIZE * 2 - 1 - i);
> +
> + if (dpb[i / 2].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
> + dpb_longterm |= BIT(HANTRO_H264_DPB_SIZE * 2 - 1 - i);
> + }
> +
> + ctx->h264_dec.dpb_valid = dpb_valid;
> + ctx->h264_dec.dpb_longterm = dpb_longterm;
> + } else {
> + for (i = 0; i < HANTRO_H264_DPB_SIZE; ++i) {
> + if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE)
> + dpb_valid |= BIT(HANTRO_H264_DPB_SIZE - 1 - i);
> +
> + if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
> + dpb_longterm |= BIT(HANTRO_H264_DPB_SIZE - 1 - i);
> + }
> +
> + ctx->h264_dec.dpb_valid = dpb_valid << 16;
> + ctx->h264_dec.dpb_longterm = dpb_longterm << 16;
> + }
> +
> for (i = 0; i < HANTRO_H264_DPB_SIZE; ++i) {
> - tbl->poc[i * 2] = dpb[i].top_field_order_cnt;
> - tbl->poc[i * 2 + 1] = dpb[i].bottom_field_order_cnt;
> + if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE) {
> + tbl->poc[i * 2] = dpb[i].top_field_order_cnt;
> + tbl->poc[i * 2 + 1] = dpb[i].bottom_field_order_cnt;
> + } else {
> + tbl->poc[i * 2] = 0;
> + tbl->poc[i * 2 + 1] = 0;
> + }
> }
>
> - tbl->poc[32] = dec_param->top_field_order_cnt;
> - tbl->poc[33] = dec_param->bottom_field_order_cnt;
> + if ((slices[0].flags & V4L2_H264_SLICE_FLAG_FIELD_PIC) || !(slices[0].flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD)) {
> + if ((slices[0].flags & V4L2_H264_SLICE_FLAG_FIELD_PIC))
> + tbl->poc[32] = (slices[0].flags & V4L2_H264_SLICE_FLAG_BOTTOM_FIELD) ?
> + dec_param->bottom_field_order_cnt :
> + dec_param->top_field_order_cnt;
> + else
> + tbl->poc[32] = min(dec_param->top_field_order_cnt, dec_param->bottom_field_order_cnt);
> + tbl->poc[33] = 0;
> + } else {
> + tbl->poc[32] = dec_param->top_field_order_cnt;
> + tbl->poc[33] = dec_param->bottom_field_order_cnt;
> + }
>
> reorder_scaling_list(ctx);
> }
> @@ -251,51 +299,36 @@ struct hantro_h264_reflist_builder {
> u8 num_valid;
> };
>
> -static s32 get_poc(enum v4l2_field field, s32 top_field_order_cnt,
> - s32 bottom_field_order_cnt)
> -{
> - switch (field) {
> - case V4L2_FIELD_TOP:
> - return top_field_order_cnt;
> - case V4L2_FIELD_BOTTOM:
> - return bottom_field_order_cnt;
> - default:
> - break;
> - }
> -
> - return min(top_field_order_cnt, bottom_field_order_cnt);
> -}
> -
> static void
> init_reflist_builder(struct hantro_ctx *ctx,
> struct hantro_h264_reflist_builder *b)
> {
> const struct v4l2_ctrl_h264_decode_params *dec_param;
> - struct vb2_v4l2_buffer *buf = hantro_get_dst_buf(ctx);
> + const struct v4l2_ctrl_h264_slice_params *slices;
> const struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
> - struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
> unsigned int i;
>
> dec_param = ctx->h264_dec.ctrls.decode;
> + slices = ctx->h264_dec.ctrls.slices;
>
> memset(b, 0, sizeof(*b));
> b->dpb = dpb;
> - b->curpoc = get_poc(buf->field, dec_param->top_field_order_cnt,
> - dec_param->bottom_field_order_cnt);
> + b->curpoc = (slices[0].flags & V4L2_H264_SLICE_FLAG_BOTTOM_FIELD) ?
> + dec_param->bottom_field_order_cnt :
> + dec_param->top_field_order_cnt;
>
> for (i = 0; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++) {
> - int buf_idx;
> -
> - if (!(dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
> + u32 ref_flag = dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_REF_FRAME;
> + if (!ref_flag)
> continue;
>
> - buf_idx = vb2_find_timestamp(cap_q, dpb[i].reference_ts, 0);
> - if (buf_idx < 0)
> - continue;
> + if (ref_flag == V4L2_H264_DPB_ENTRY_FLAG_REF_FRAME)
> + b->pocs[i] = min(dpb[i].bottom_field_order_cnt, dpb[i].top_field_order_cnt);
> + else if (ref_flag == V4L2_H264_DPB_ENTRY_FLAG_REF_BOTTOM)
> + b->pocs[i] = dpb[i].bottom_field_order_cnt;
> + else if (ref_flag == V4L2_H264_DPB_ENTRY_FLAG_REF_TOP)
> + b->pocs[i] = dpb[i].top_field_order_cnt;
>
> - buf = to_vb2_v4l2_buffer(vb2_get_buffer(cap_q, buf_idx));
> - b->pocs[i] = get_poc(buf->field, dpb[i].top_field_order_cnt,
> - dpb[i].bottom_field_order_cnt);
> b->unordered_reflist[b->num_valid] = i;
> b->num_valid++;
> }
> @@ -448,8 +481,7 @@ build_b_ref_lists(const struct hantro_h264_reflist_builder *builder,
> static bool dpb_entry_match(const struct v4l2_h264_dpb_entry *a,
> const struct v4l2_h264_dpb_entry *b)
> {
> - return a->top_field_order_cnt == b->top_field_order_cnt &&
> - a->bottom_field_order_cnt == b->bottom_field_order_cnt;
> + return a->reference_ts == b->reference_ts;
> }
>
> static void update_dpb(struct hantro_ctx *ctx)
> @@ -463,13 +495,13 @@ static void update_dpb(struct hantro_ctx *ctx)
>
> /* Disable all entries by default. */
> for (i = 0; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++)
> - ctx->h264_dec.dpb[i].flags &= ~V4L2_H264_DPB_ENTRY_FLAG_ACTIVE;
> + ctx->h264_dec.dpb[i].flags = 0;
>
> /* Try to match new DPB entries with existing ones by their POCs. */
> for (i = 0; i < ARRAY_SIZE(dec_param->dpb); i++) {
> const struct v4l2_h264_dpb_entry *ndpb = &dec_param->dpb[i];
>
> - if (!(ndpb->flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
> + if (!(ndpb->flags & V4L2_H264_DPB_ENTRY_FLAG_VALID))
> continue;
>
> /*
> @@ -480,8 +512,7 @@ static void update_dpb(struct hantro_ctx *ctx)
> struct v4l2_h264_dpb_entry *cdpb;
>
> cdpb = &ctx->h264_dec.dpb[j];
> - if (cdpb->flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE ||
> - !dpb_entry_match(cdpb, ndpb))
> + if (!dpb_entry_match(cdpb, ndpb))
> continue;
>
> *cdpb = *ndpb;
> @@ -541,6 +572,25 @@ struct vb2_buffer *hantro_h264_get_ref_buf(struct hantro_ctx *ctx,
> return buf;
> }
>
> +dma_addr_t hantro_h264_get_ref_dma_addr(struct hantro_ctx *ctx,
> + unsigned int dpb_idx)
> +{
> + struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
> + const struct v4l2_ctrl_h264_decode_params *dec_param = ctx->h264_dec.ctrls.decode;
> + const struct v4l2_ctrl_h264_slice_params *slices = ctx->h264_dec.ctrls.slices;
> +
> + struct vb2_buffer *buf = hantro_h264_get_ref_buf(ctx, dpb_idx);
> + s32 cur_poc = slices[0].flags & V4L2_H264_SLICE_FLAG_BOTTOM_FIELD ?
> + dec_param->bottom_field_order_cnt :
> + dec_param->top_field_order_cnt;
> + u32 flags = dpb[dpb_idx].flags & V4L2_H264_DPB_ENTRY_FLAG_FIELD_PICTURE ? 0x2 : 0;
> + flags |= abs(dpb[dpb_idx].top_field_order_cnt - cur_poc) <
> + abs(dpb[dpb_idx].bottom_field_order_cnt - cur_poc) ?
> + 0x1 : 0;
> +
> + return vb2_dma_contig_plane_dma_addr(buf, 0) | flags;
> +}
> +
> int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx)
> {
> struct hantro_h264_dec_hw_ctx *h264_ctx = &ctx->h264_dec;
> diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h
> index 8adad8ac9b1d..d58f2a36ca40 100644
> --- a/drivers/staging/media/hantro/hantro_hw.h
> +++ b/drivers/staging/media/hantro/hantro_hw.h
> @@ -86,6 +86,8 @@ struct hantro_h264_dec_hw_ctx {
> struct v4l2_h264_dpb_entry dpb[HANTRO_H264_DPB_SIZE];
> struct hantro_h264_dec_reflists reflists;
> struct hantro_h264_dec_ctrls ctrls;
> + u32 dpb_longterm;
> + u32 dpb_valid;
> };
>
> /**
> @@ -157,6 +159,8 @@ void hantro_jpeg_enc_exit(struct hantro_ctx *ctx);
>
> struct vb2_buffer *hantro_h264_get_ref_buf(struct hantro_ctx *ctx,
> unsigned int dpb_idx);
> +dma_addr_t hantro_h264_get_ref_dma_addr(struct hantro_ctx *ctx,
> + unsigned int dpb_idx);
> int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx);
> void hantro_g1_h264_dec_run(struct hantro_ctx *ctx);
> int hantro_h264_dec_init(struct hantro_ctx *ctx);

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In reply to: Jonas Karlman: "[RFC 08/12] media: hantro: Fix H264 decoding of field encoded content"
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