diff options
Diffstat (limited to 'drivers/staging/media/hantro/hantro_hw.h')
| -rw-r--r-- | drivers/staging/media/hantro/hantro_hw.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h index 7dfc9bad7297..4053d8710e04 100644 --- a/drivers/staging/media/hantro/hantro_hw.h +++ b/drivers/staging/media/hantro/hantro_hw.h @@ -18,6 +18,10 @@ #define DEC_8190_ALIGN_MASK 0x07U +#define MB_DIM 16 +#define MB_WIDTH(w) DIV_ROUND_UP(w, MB_DIM) +#define MB_HEIGHT(h) DIV_ROUND_UP(h, MB_DIM) + struct hantro_dev; struct hantro_ctx; struct hantro_buf; @@ -176,6 +180,33 @@ void hantro_g1_h264_dec_run(struct hantro_ctx *ctx); int hantro_h264_dec_init(struct hantro_ctx *ctx); void hantro_h264_dec_exit(struct hantro_ctx *ctx); +static inline size_t +hantro_h264_mv_size(unsigned int width, unsigned int height) +{ + /* + * A decoded 8-bit 4:2:0 NV12 frame may need memory for up to + * 448 bytes per macroblock with additional 32 bytes on + * multi-core variants. + * + * The H264 decoder needs extra space on the output buffers + * to store motion vectors. This is needed for reference + * frames and only if the format is non-post-processed NV12. + * + * Memory layout is as follow: + * + * +---------------------------+ + * | Y-plane 256 bytes x MBs | + * +---------------------------+ + * | UV-plane 128 bytes x MBs | + * +---------------------------+ + * | MV buffer 64 bytes x MBs | + * +---------------------------+ + * | MC sync 32 bytes | + * +---------------------------+ + */ + return 64 * MB_WIDTH(width) * MB_WIDTH(height) + 32; +} + void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx); void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx); void hantro_mpeg2_dec_copy_qtable(u8 *qtable, |