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Subject[PATCH v6 3/6] media: hantro: h264: Use the generic H264 reflist builder
Date
From: Boris Brezillon <boris.brezillon@collabora.com>

Now that the core provides generic reflist builders, we can use them
instead of implementing our own.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
drivers/staging/media/hantro/Kconfig | 1 +
drivers/staging/media/hantro/hantro_h264.c | 237 +--------------------
2 files changed, 9 insertions(+), 229 deletions(-)

diff --git a/drivers/staging/media/hantro/Kconfig b/drivers/staging/media/hantro/Kconfig
index de77fe6554e7..33482910dee2 100644
--- a/drivers/staging/media/hantro/Kconfig
+++ b/drivers/staging/media/hantro/Kconfig
@@ -7,6 +7,7 @@ config VIDEO_HANTRO
select VIDEOBUF2_DMA_CONTIG
select VIDEOBUF2_VMALLOC
select V4L2_MEM2MEM_DEV
+ select V4L2_H264
help
Support for the Hantro IP based Video Processing Unit present on
Rockchip SoC, which accelerates video and image encoding and
diff --git a/drivers/staging/media/hantro/hantro_h264.c b/drivers/staging/media/hantro/hantro_h264.c
index f2d3e81fb6ce..d561f125085a 100644
--- a/drivers/staging/media/hantro/hantro_h264.c
+++ b/drivers/staging/media/hantro/hantro_h264.c
@@ -11,7 +11,7 @@
*/

#include <linux/types.h>
-#include <linux/sort.h>
+#include <media/v4l2-h264.h>
#include <media/v4l2-mem2mem.h>

#include "hantro.h"
@@ -240,229 +240,6 @@ static void prepare_table(struct hantro_ctx *ctx)
reorder_scaling_list(ctx);
}

-struct hantro_h264_reflist_builder {
- const struct v4l2_h264_dpb_entry *dpb;
- s32 pocs[HANTRO_H264_DPB_SIZE];
- u8 unordered_reflist[HANTRO_H264_DPB_SIZE];
- int frame_nums[HANTRO_H264_DPB_SIZE];
- s32 curpoc;
- 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_slice_params *slice_params;
- const struct v4l2_ctrl_h264_decode_params *dec_param;
- const struct v4l2_ctrl_h264_sps *sps;
- struct vb2_v4l2_buffer *buf = hantro_get_dst_buf(ctx);
- const struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
- struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
- int cur_frame_num, max_frame_num;
- unsigned int i;
-
- dec_param = ctx->h264_dec.ctrls.decode;
- slice_params = &ctx->h264_dec.ctrls.slices[0];
- sps = ctx->h264_dec.ctrls.sps;
- max_frame_num = 1 << (sps->log2_max_frame_num_minus4 + 4);
- cur_frame_num = slice_params->frame_num;
-
- 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);
-
- for (i = 0; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++) {
- int buf_idx;
-
- if (!(dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
- continue;
-
- buf_idx = vb2_find_timestamp(cap_q, dpb[i].reference_ts, 0);
- if (buf_idx < 0)
- continue;
-
- buf = to_vb2_v4l2_buffer(vb2_get_buffer(cap_q, buf_idx));
-
- /*
- * Handle frame_num wraparound as described in section
- * '8.2.4.1 Decoding process for picture numbers' of the spec.
- * TODO: This logic will have to be adjusted when we start
- * supporting interlaced content.
- */
- if (dpb[i].frame_num > cur_frame_num)
- b->frame_nums[i] = (int)dpb[i].frame_num - max_frame_num;
- else
- b->frame_nums[i] = dpb[i].frame_num;
-
- 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++;
- }
-
- for (i = b->num_valid; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++)
- b->unordered_reflist[i] = i;
-}
-
-static int p_ref_list_cmp(const void *ptra, const void *ptrb, const void *data)
-{
- const struct hantro_h264_reflist_builder *builder = data;
- const struct v4l2_h264_dpb_entry *a, *b;
- u8 idxa, idxb;
-
- idxa = *((u8 *)ptra);
- idxb = *((u8 *)ptrb);
- a = &builder->dpb[idxa];
- b = &builder->dpb[idxb];
-
- if ((a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) !=
- (b->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)) {
- /* Short term pics firt. */
- if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
- return -1;
- else
- return 1;
- }
-
- /*
- * Short term pics in descending pic num order, long term ones in
- * ascending order.
- */
- if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
- return HANTRO_CMP(builder->frame_nums[idxb],
- builder->frame_nums[idxa]);
-
- return HANTRO_CMP(a->pic_num, b->pic_num);
-}
-
-static int b0_ref_list_cmp(const void *ptra, const void *ptrb, const void *data)
-{
- const struct hantro_h264_reflist_builder *builder = data;
- const struct v4l2_h264_dpb_entry *a, *b;
- s32 poca, pocb;
- u8 idxa, idxb;
-
- idxa = *((u8 *)ptra);
- idxb = *((u8 *)ptrb);
- a = &builder->dpb[idxa];
- b = &builder->dpb[idxb];
-
- if ((a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) !=
- (b->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)) {
- /* Short term pics firt. */
- if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
- return -1;
- else
- return 1;
- }
-
- /* Long term pics in ascending pic num order. */
- if (a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
- return HANTRO_CMP(a->pic_num, b->pic_num);
-
- poca = builder->pocs[idxa];
- pocb = builder->pocs[idxb];
-
- /*
- * Short term pics with POC < cur POC first in POC descending order
- * followed by short term pics with POC > cur POC in POC ascending
- * order.
- */
- if ((poca < builder->curpoc) != (pocb < builder->curpoc))
- return HANTRO_CMP(poca, pocb);
- else if (poca < builder->curpoc)
- return HANTRO_CMP(pocb, poca);
-
- return HANTRO_CMP(poca, pocb);
-}
-
-static int b1_ref_list_cmp(const void *ptra, const void *ptrb, const void *data)
-{
- const struct hantro_h264_reflist_builder *builder = data;
- const struct v4l2_h264_dpb_entry *a, *b;
- s32 poca, pocb;
- u8 idxa, idxb;
-
- idxa = *((u8 *)ptra);
- idxb = *((u8 *)ptrb);
- a = &builder->dpb[idxa];
- b = &builder->dpb[idxb];
-
- if ((a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) !=
- (b->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)) {
- /* Short term pics firt. */
- if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
- return -1;
- else
- return 1;
- }
-
- /* Long term pics in ascending pic num order. */
- if (a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
- return HANTRO_CMP(a->pic_num, b->pic_num);
-
- poca = builder->pocs[idxa];
- pocb = builder->pocs[idxb];
-
- /*
- * Short term pics with POC > cur POC first in POC ascending order
- * followed by short term pics with POC < cur POC in POC descending
- * order.
- */
- if ((poca < builder->curpoc) != (pocb < builder->curpoc))
- return HANTRO_CMP(pocb, poca);
- else if (poca < builder->curpoc)
- return HANTRO_CMP(pocb, poca);
-
- return HANTRO_CMP(poca, pocb);
-}
-
-static void
-build_p_ref_list(const struct hantro_h264_reflist_builder *builder,
- u8 *reflist)
-{
- memcpy(reflist, builder->unordered_reflist,
- sizeof(builder->unordered_reflist));
- sort_r(reflist, builder->num_valid, sizeof(*reflist),
- p_ref_list_cmp, NULL, builder);
-}
-
-static void
-build_b_ref_lists(const struct hantro_h264_reflist_builder *builder,
- u8 *b0_reflist, u8 *b1_reflist)
-{
- memcpy(b0_reflist, builder->unordered_reflist,
- sizeof(builder->unordered_reflist));
- sort_r(b0_reflist, builder->num_valid, sizeof(*b0_reflist),
- b0_ref_list_cmp, NULL, builder);
-
- memcpy(b1_reflist, builder->unordered_reflist,
- sizeof(builder->unordered_reflist));
- sort_r(b1_reflist, builder->num_valid, sizeof(*b1_reflist),
- b1_ref_list_cmp, NULL, builder);
-
- if (builder->num_valid > 1 &&
- !memcmp(b1_reflist, b0_reflist, builder->num_valid))
- swap(b1_reflist[0], b1_reflist[1]);
-}
-
static bool dpb_entry_match(const struct v4l2_h264_dpb_entry *a,
const struct v4l2_h264_dpb_entry *b)
{
@@ -560,7 +337,7 @@ int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx)
{
struct hantro_h264_dec_hw_ctx *h264_ctx = &ctx->h264_dec;
struct hantro_h264_dec_ctrls *ctrls = &h264_ctx->ctrls;
- struct hantro_h264_reflist_builder reflist_builder;
+ struct v4l2_h264_reflist_builder reflist_builder;

hantro_start_prepare_run(ctx);

@@ -596,10 +373,12 @@ int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx)
prepare_table(ctx);

/* Build the P/B{0,1} ref lists. */
- init_reflist_builder(ctx, &reflist_builder);
- build_p_ref_list(&reflist_builder, h264_ctx->reflists.p);
- build_b_ref_lists(&reflist_builder, h264_ctx->reflists.b0,
- h264_ctx->reflists.b1);
+ v4l2_h264_init_reflist_builder(&reflist_builder, ctrls->decode,
+ &ctrls->slices[0], ctrls->sps,
+ ctx->h264_dec.dpb);
+ v4l2_h264_build_p_ref_list(&reflist_builder, h264_ctx->reflists.p);
+ v4l2_h264_build_b_ref_lists(&reflist_builder, h264_ctx->reflists.b0,
+ h264_ctx->reflists.b1);
return 0;
}

--
2.25.0
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