[FFmpeg-devel] [PATCH v2] avcodec/hevcdec: fix stat_coeff save/load for persistent_rice_adaptation_enabled_flag

Guangxin Xu oddstone at gmail.com
Sun Nov 15 04:41:49 EET 2020


Hi  Christophe,
Thanks for the test. You are right, It's a wpp decode issue.
Please help review it again.

I have test it with
make fate-hevc THREADS=12 THREAD_TYPE=slice
make fate-hevc THREADS=12
make fate-hevc-conformance-WPP_HIGH_TP_444_8BIT_RExt_Apple_2 THREADS=12
THREAD_TYPE=slice

thanks

On Sun, Nov 15, 2020 at 10:36 AM Xu Guangxin <oddstone at gmail.com> wrote:

> It's required by the 9.3.1 TableStatCoeff* section.
>
> Following clips have this feature:
> WPP_HIGH_TP_444_8BIT_RExt_Apple_2.bit
> Bitdepth_A_RExt_Sony_1.bin
> Bitdepth_B_RExt_Sony_1.bin
> EXTPREC_HIGHTHROUGHPUT_444_16_INTRA_10BIT_RExt_Sony_1.bit
> EXTPREC_HIGHTHROUGHPUT_444_16_INTRA_12BIT_RExt_Sony_1.bit
> EXTPREC_HIGHTHROUGHPUT_444_16_INTRA_8BIT_RExt_Sony_1.bit
> EXTPREC_MAIN_444_16_INTRA_10BIT_RExt_Sony_1.bit
> EXTPREC_MAIN_444_16_INTRA_12BIT_RExt_Sony_1.bit
> EXTPREC_MAIN_444_16_INTRA_8BIT_RExt_Sony_1.bit
> WPP_AND_TILE_10Bit422Test_HIGH_TP_444_10BIT_RExt_Apple_2.bit
> WPP_AND_TILE_AND_CABAC_BYPASS_ALIGN_0_HIGH_TP_444_14BIT_RExt_Apple_2.bit
> WPP_AND_TILE_AND_CABAC_BYPASS_ALIGN_1_HIGH_TP_444_14BIT_RExt_Apple_2.bit
> WPP_AND_TILE_HIGH_TP_444_8BIT_RExt_Apple_2.bit
>
> you can download them from:
>
> https://www.itu.int/wftp3/av-arch/jctvc-site/bitstream_exchange/draft_conformance/RExt/
>
> Signed-off-by: Xu Guangxin <oddstone at gmail.com>
> ---
>  libavcodec/hevc_cabac.c | 15 +++++++++++----
>  libavcodec/hevcdec.c    |  4 ++--
>  libavcodec/hevcdec.h    |  6 ++++--
>  3 files changed, 17 insertions(+), 8 deletions(-)
>
> diff --git a/libavcodec/hevc_cabac.c b/libavcodec/hevc_cabac.c
> index 3dc0987dad..93fc1ec795 100644
> --- a/libavcodec/hevc_cabac.c
> +++ b/libavcodec/hevc_cabac.c
> @@ -454,12 +454,19 @@ void ff_hevc_save_states(HEVCContext *s, int
> ctb_addr_ts)
>           (s->ps.sps->ctb_width == 2 &&
>            ctb_addr_ts % s->ps.sps->ctb_width == 0))) {
>          memcpy(s->cabac_state, s->HEVClc->cabac_state, HEVC_CONTEXTS);
> +        if (s->ps.sps->persistent_rice_adaptation_enabled_flag) {
> +            memcpy(s->stat_coeff, s->HEVClc->stat_coeff,
> HEVC_STAT_COEFFS);
> +        }
>      }
>  }
>
> -static void load_states(HEVCContext *s)
> +static void load_states(HEVCContext *s, int thread)
>  {
>      memcpy(s->HEVClc->cabac_state, s->cabac_state, HEVC_CONTEXTS);
> +    if (s->ps.sps->persistent_rice_adaptation_enabled_flag) {
> +        const HEVCContext *prev = s->sList[(thread + s->threads_number -
> 1) % s->threads_number];
> +        memcpy(s->HEVClc->stat_coeff, prev->stat_coeff, HEVC_STAT_COEFFS);
> +    }
>  }
>
>  static int cabac_reinit(HEVCLocalContext *lc)
> @@ -501,7 +508,7 @@ static void cabac_init_state(HEVCContext *s)
>          s->HEVClc->stat_coeff[i] = 0;
>  }
>
> -int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts)
> +int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts, int thread)
>  {
>      if (ctb_addr_ts ==
> s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_ctb_addr_rs]) {
>          int ret = cabac_init_decoder(s);
> @@ -518,7 +525,7 @@ int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts)
>                  if (s->ps.sps->ctb_width == 1)
>                      cabac_init_state(s);
>                  else if (s->sh.dependent_slice_segment_flag == 1)
> -                    load_states(s);
> +                    load_states(s, thread);
>              }
>          }
>      } else {
> @@ -549,7 +556,7 @@ int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts)
>                  if (s->ps.sps->ctb_width == 1)
>                      cabac_init_state(s);
>                  else
> -                    load_states(s);
> +                    load_states(s, thread);
>              }
>          }
>      }
> diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
> index 699c13bbcc..7191fcf542 100644
> --- a/libavcodec/hevcdec.c
> +++ b/libavcodec/hevcdec.c
> @@ -2473,7 +2473,7 @@ static int hls_decode_entry(AVCodecContext *avctxt,
> void *isFilterThread)
>          y_ctb = (ctb_addr_rs / ((s->ps.sps->width + ctb_size - 1) >>
> s->ps.sps->log2_ctb_size)) << s->ps.sps->log2_ctb_size;
>          hls_decode_neighbour(s, x_ctb, y_ctb, ctb_addr_ts);
>
> -        ret = ff_hevc_cabac_init(s, ctb_addr_ts);
> +        ret = ff_hevc_cabac_init(s, ctb_addr_ts, 0);
>          if (ret < 0) {
>              s->tab_slice_address[ctb_addr_rs] = -1;
>              return ret;
> @@ -2551,7 +2551,7 @@ static int hls_decode_entry_wpp(AVCodecContext
> *avctxt, void *input_ctb_row, int
>              return 0;
>          }
>
> -        ret = ff_hevc_cabac_init(s, ctb_addr_ts);
> +        ret = ff_hevc_cabac_init(s, ctb_addr_ts, thread);
>          if (ret < 0)
>              goto error;
>          hls_sao_param(s, x_ctb >> s->ps.sps->log2_ctb_size, y_ctb >>
> s->ps.sps->log2_ctb_size);
> diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
> index 39c5c7f89f..5b49384aea 100644
> --- a/libavcodec/hevcdec.h
> +++ b/libavcodec/hevcdec.h
> @@ -53,6 +53,7 @@
>  #define DEFAULT_INTRA_TC_OFFSET 2
>
>  #define HEVC_CONTEXTS 199
> +#define HEVC_STAT_COEFFS 4
>
>  #define MRG_MAX_NUM_CANDS     5
>
> @@ -424,7 +425,7 @@ typedef struct HEVCFrame {
>  typedef struct HEVCLocalContext {
>      uint8_t cabac_state[HEVC_CONTEXTS];
>
> -    uint8_t stat_coeff[4];
> +    uint8_t stat_coeff[HEVC_STAT_COEFFS];
>
>      uint8_t first_qp_group;
>
> @@ -480,6 +481,7 @@ typedef struct HEVCContext {
>      int                 height;
>
>      uint8_t *cabac_state;
> +    uint8_t stat_coeff[HEVC_STAT_COEFFS];
>
>      /** 1 if the independent slice segment header was successfully parsed
> */
>      uint8_t slice_initialized;
> @@ -594,7 +596,7 @@ int ff_hevc_frame_rps(HEVCContext *s);
>  int ff_hevc_slice_rpl(HEVCContext *s);
>
>  void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts);
> -int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts);
> +int ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts, int thread);
>  int ff_hevc_sao_merge_flag_decode(HEVCContext *s);
>  int ff_hevc_sao_type_idx_decode(HEVCContext *s);
>  int ff_hevc_sao_band_position_decode(HEVCContext *s);
> --
> 2.17.1
>
>


More information about the ffmpeg-devel mailing list