diff options
| author | Zhao, Halley <halley.zhao@intel.com> | 2013-12-03 13:43:56 +0800 |
|---|---|---|
| committer | Xiang, Haihao <haihao.xiang@intel.com> | 2014-02-13 15:07:57 +0800 |
| commit | a46a26f4d5435d2cba2fd0e47ef3ab91797326ff (patch) | |
| tree | 6ae86e53ffe445cbd440d7dd26fe25aca20aa5e9 | |
| parent | a1c74db238495a4727976fb5ae211c3e5e9db5e7 (diff) | |
vp8 dec: refine va_dec_vp8.h
add clear notation for: key_frame/VABoolCoderContextVPX.count/num_of_partitions/partition_size[0]
remove mb_skip_coeff since it can be deduced from mb_no_coeff_skip if it is required
Signed-off-by: Zhao, Halley <halley.zhao@intel.com>
| -rw-r--r-- | va/va_dec_vp8.h | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/va/va_dec_vp8.h b/va/va_dec_vp8.h index 268ed19..1d43ca7 100644 --- a/va/va_dec_vp8.h +++ b/va/va_dec_vp8.h @@ -54,7 +54,11 @@ typedef struct _VABoolCoderContextVPX unsigned char range; /* partition 0 "value" */ unsigned char value; - /* partition 0 number of shifts before an output byte is available */ + /* + * 'partition 0 number of shifts before an output byte is available' + * it is the number of remaining bits in 'value' for decoding, range [0, 7]. + */ + unsigned char count; } VABoolCoderContextVPX; @@ -83,7 +87,7 @@ typedef struct _VAPictureParameterBufferVP8 union { struct { - /* same as key_frame in bitstream syntax */ + /* same as key_frame in bitstream syntax, 0 means a key frame */ unsigned int key_frame : 1; /* same as version in bitstream syntax */ unsigned int version : 3; @@ -107,8 +111,6 @@ typedef struct _VAPictureParameterBufferVP8 unsigned int sign_bias_alternate : 1; /* same as mb_no_coeff_skip in bitstream syntax */ unsigned int mb_no_coeff_skip : 1; - /* see section 11.1 for mb_skip_coeff */ - unsigned int mb_skip_coeff : 1; /* flag to indicate that loop filter should be disabled */ unsigned int loop_filter_disable : 1; } bits; @@ -172,7 +174,7 @@ typedef struct _VASliceParameterBufferVP8 */ unsigned int slice_data_size; /* - * offset to the first byte of partition data + * offset to the first byte of partition data (control partition) */ unsigned int slice_data_offset; /* @@ -180,12 +182,20 @@ typedef struct _VASliceParameterBufferVP8 */ unsigned int slice_data_flag; /* - * offset to the first bit of MB from the first byte of partition data + * offset to the first bit of MB from the first byte of partition data(slice_data_offset) */ unsigned int macroblock_offset; - /* Partitions */ + /* + * Partitions + * (1<<log2_nbr_of_dct_partitions)+1, count both control partition (frame header) and toke partition + */ unsigned char num_of_partitions; + /* + * partition_size[0] is remaining bytes of control partition after parsed by application. + * exclude current byte for the remaining bits in bool_coder_ctx. + * exclude the uncompress data chunk since first_part_size 'excluding the uncompressed data chunk' + */ unsigned int partition_size[9]; } VASliceParameterBufferVP8; |