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h264_cabac: constify all uses of H264Context

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All the variables modified by this code are either per-MB arrays or have
been moved to the per-slice context
This commit is contained in:
Anton Khirnov 2015-01-27 15:53:33 +01:00
parent 5c4b98de4d
commit ba7e165b86
2 changed files with 24 additions and 24 deletions
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4
libavcodec/h264.h
View File

@ -820,9 +820,9 @@ int ff_h264_decode_mb_cavlc(H264Context *h, H264SliceContext *sl);
* Decode a CABAC coded macroblock * Decode a CABAC coded macroblock
* @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
*/ */
int ff_h264_decode_mb_cabac(H264Context *h, H264SliceContext *sl); int ff_h264_decode_mb_cabac(const H264Context *h, H264SliceContext *sl);
void ff_h264_init_cabac_states(H264Context *h, H264SliceContext *sl); void ff_h264_init_cabac_states(const H264Context *h, H264SliceContext *sl);
void h264_init_dequant_tables(H264Context *h); void h264_init_dequant_tables(H264Context *h);

44
libavcodec/h264_cabac.c
View File

@ -1261,7 +1261,7 @@ static const int8_t cabac_context_init_PB[3][1024][2] =
} }
}; };
void ff_h264_init_cabac_states(H264Context *h, H264SliceContext *sl) void ff_h264_init_cabac_states(const H264Context *h, H264SliceContext *sl)
{ {
int i; int i;
const int8_t (*tab)[2]; const int8_t (*tab)[2];
@ -1282,7 +1282,7 @@ void ff_h264_init_cabac_states(H264Context *h, H264SliceContext *sl)
} }
} }
static int decode_cabac_field_decoding_flag(H264Context *h, H264SliceContext *sl) static int decode_cabac_field_decoding_flag(const H264Context *h, H264SliceContext *sl)
{ {
const long mbb_xy = sl->mb_xy - 2L*h->mb_stride; const long mbb_xy = sl->mb_xy - 2L*h->mb_stride;
@ -1294,7 +1294,7 @@ static int decode_cabac_field_decoding_flag(H264Context *h, H264SliceContext *sl
return get_cabac_noinline( &sl->cabac, &(sl->cabac_state+70)[ctx] ); return get_cabac_noinline( &sl->cabac, &(sl->cabac_state+70)[ctx] );
} }
static int decode_cabac_intra_mb_type(H264Context *h, H264SliceContext *sl, static int decode_cabac_intra_mb_type(const H264Context *h, H264SliceContext *sl,
int ctx_base, int intra_slice) int ctx_base, int intra_slice)
{ {
uint8_t *state= &sl->cabac_state[ctx_base]; uint8_t *state= &sl->cabac_state[ctx_base];
@ -1326,7 +1326,7 @@ static int decode_cabac_intra_mb_type(H264Context *h, H264SliceContext *sl,
return mb_type; return mb_type;
} }
static int decode_cabac_mb_skip(H264Context *h, H264SliceContext *sl, static int decode_cabac_mb_skip(const H264Context *h, H264SliceContext *sl,
int mb_x, int mb_y) int mb_x, int mb_y)
{ {
int mba_xy, mbb_xy; int mba_xy, mbb_xy;
@ -1363,7 +1363,7 @@ static int decode_cabac_mb_skip(H264Context *h, H264SliceContext *sl,
return get_cabac_noinline( &sl->cabac, &sl->cabac_state[11+ctx] ); return get_cabac_noinline( &sl->cabac, &sl->cabac_state[11+ctx] );
} }
static int decode_cabac_mb_intra4x4_pred_mode(H264Context *h, H264SliceContext *sl, int pred_mode) static int decode_cabac_mb_intra4x4_pred_mode(const H264Context *h, H264SliceContext *sl, int pred_mode)
{ {
int mode = 0; int mode = 0;
@ -1377,7 +1377,7 @@ static int decode_cabac_mb_intra4x4_pred_mode(H264Context *h, H264SliceContext *
return mode + ( mode >= pred_mode ); return mode + ( mode >= pred_mode );
} }
static int decode_cabac_mb_chroma_pre_mode(H264Context *h, H264SliceContext *sl) static int decode_cabac_mb_chroma_pre_mode(const H264Context *h, H264SliceContext *sl)
{ {
const int mba_xy = sl->left_mb_xy[0]; const int mba_xy = sl->left_mb_xy[0];
const int mbb_xy = sl->top_mb_xy; const int mbb_xy = sl->top_mb_xy;
@ -1402,7 +1402,7 @@ static int decode_cabac_mb_chroma_pre_mode(H264Context *h, H264SliceContext *sl)
return 3; return 3;
} }
static int decode_cabac_mb_cbp_luma(H264Context *h, H264SliceContext *sl) static int decode_cabac_mb_cbp_luma(const H264Context *h, H264SliceContext *sl)
{ {
int cbp_b, cbp_a, ctx, cbp = 0; int cbp_b, cbp_a, ctx, cbp = 0;
@ -1419,7 +1419,7 @@ static int decode_cabac_mb_cbp_luma(H264Context *h, H264SliceContext *sl)
cbp += get_cabac_noinline(&sl->cabac, &sl->cabac_state[73 + ctx]) << 3; cbp += get_cabac_noinline(&sl->cabac, &sl->cabac_state[73 + ctx]) << 3;
return cbp; return cbp;
} }
static int decode_cabac_mb_cbp_chroma(H264Context *h, H264SliceContext *sl) static int decode_cabac_mb_cbp_chroma(const H264Context *h, H264SliceContext *sl)
{ {
int ctx; int ctx;
int cbp_a, cbp_b; int cbp_a, cbp_b;
@ -1439,7 +1439,7 @@ static int decode_cabac_mb_cbp_chroma(H264Context *h, H264SliceContext *sl)
return 1 + get_cabac_noinline( &sl->cabac, &sl->cabac_state[77 + ctx] ); return 1 + get_cabac_noinline( &sl->cabac, &sl->cabac_state[77 + ctx] );
} }
static int decode_cabac_p_mb_sub_type(H264Context *h, H264SliceContext *sl) static int decode_cabac_p_mb_sub_type(const H264Context *h, H264SliceContext *sl)
{ {
if( get_cabac( &sl->cabac, &sl->cabac_state[21] ) ) if( get_cabac( &sl->cabac, &sl->cabac_state[21] ) )
return 0; /* 8x8 */ return 0; /* 8x8 */
@ -1449,7 +1449,7 @@ static int decode_cabac_p_mb_sub_type(H264Context *h, H264SliceContext *sl)
return 2; /* 4x8 */ return 2; /* 4x8 */
return 3; /* 4x4 */ return 3; /* 4x4 */
} }
static int decode_cabac_b_mb_sub_type(H264Context *h, H264SliceContext *sl) static int decode_cabac_b_mb_sub_type(const H264Context *h, H264SliceContext *sl)
{ {
int type; int type;
if( !get_cabac( &sl->cabac, &sl->cabac_state[36] ) ) if( !get_cabac( &sl->cabac, &sl->cabac_state[36] ) )
@ -1467,7 +1467,7 @@ static int decode_cabac_b_mb_sub_type(H264Context *h, H264SliceContext *sl)
return type; return type;
} }
static int decode_cabac_mb_ref(H264Context *h, H264SliceContext *sl, int list, int n) static int decode_cabac_mb_ref(const H264Context *h, H264SliceContext *sl, int list, int n)
{ {
int refa = sl->ref_cache[list][scan8[n] - 1]; int refa = sl->ref_cache[list][scan8[n] - 1];
int refb = sl->ref_cache[list][scan8[n] - 8]; int refb = sl->ref_cache[list][scan8[n] - 8];
@ -1496,7 +1496,7 @@ static int decode_cabac_mb_ref(H264Context *h, H264SliceContext *sl, int list, i
return ref; return ref;
} }
static int decode_cabac_mb_mvd(H264Context *h, H264SliceContext *sl, int ctxbase, int amvd, int *mvda) static int decode_cabac_mb_mvd(const H264Context *h, H264SliceContext *sl, int ctxbase, int amvd, int *mvda)
{ {
int mvd; int mvd;
@ -1544,7 +1544,7 @@ static int decode_cabac_mb_mvd(H264Context *h, H264SliceContext *sl, int ctxbase
my += decode_cabac_mb_mvd(h, sl, 47, amvd1, &mpy);\ my += decode_cabac_mb_mvd(h, sl, 47, amvd1, &mpy);\
} }
static av_always_inline int get_cabac_cbf_ctx(H264Context *h, H264SliceContext *sl, static av_always_inline int get_cabac_cbf_ctx(const H264Context *h, H264SliceContext *sl,
int cat, int idx, int max_coeff, int cat, int idx, int max_coeff,
int is_dc) int is_dc)
{ {
@ -1577,7 +1577,7 @@ static av_always_inline int get_cabac_cbf_ctx(H264Context *h, H264SliceContext *
} }
static av_always_inline void static av_always_inline void
decode_cabac_residual_internal(H264Context *h, H264SliceContext *sl, decode_cabac_residual_internal(const H264Context *h, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, const uint8_t *scantable, int cat, int n, const uint8_t *scantable,
const uint32_t *qmul, int max_coeff, const uint32_t *qmul, int max_coeff,
@ -1762,7 +1762,7 @@ decode_cabac_residual_internal(H264Context *h, H264SliceContext *sl,
} }
static av_noinline void decode_cabac_residual_dc_internal(H264Context *h, static av_noinline void decode_cabac_residual_dc_internal(const H264Context *h,
H264SliceContext *sl, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, int cat, int n,
@ -1772,7 +1772,7 @@ static av_noinline void decode_cabac_residual_dc_internal(H264Context *h,
decode_cabac_residual_internal(h, sl, block, cat, n, scantable, NULL, max_coeff, 1, 0); decode_cabac_residual_internal(h, sl, block, cat, n, scantable, NULL, max_coeff, 1, 0);
} }
static av_noinline void decode_cabac_residual_dc_internal_422(H264Context *h, static av_noinline void decode_cabac_residual_dc_internal_422(const H264Context *h,
H264SliceContext *sl, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, int cat, int n,
@ -1782,7 +1782,7 @@ static av_noinline void decode_cabac_residual_dc_internal_422(H264Context *h,
decode_cabac_residual_internal(h, sl, block, cat, n, scantable, NULL, max_coeff, 1, 1); decode_cabac_residual_internal(h, sl, block, cat, n, scantable, NULL, max_coeff, 1, 1);
} }
static av_noinline void decode_cabac_residual_nondc_internal(H264Context *h, static av_noinline void decode_cabac_residual_nondc_internal(const H264Context *h,
H264SliceContext *sl, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, int cat, int n,
@ -1805,7 +1805,7 @@ static av_noinline void decode_cabac_residual_nondc_internal(H264Context *h,
* because it allows improved constant propagation into get_cabac_cbf_ctx, * because it allows improved constant propagation into get_cabac_cbf_ctx,
* as well as because most blocks have zero CBFs. */ * as well as because most blocks have zero CBFs. */
static av_always_inline void decode_cabac_residual_dc(H264Context *h, static av_always_inline void decode_cabac_residual_dc(const H264Context *h,
H264SliceContext *sl, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, int cat, int n,
@ -1821,7 +1821,7 @@ static av_always_inline void decode_cabac_residual_dc(H264Context *h,
} }
static av_always_inline void static av_always_inline void
decode_cabac_residual_dc_422(H264Context *h, H264SliceContext *sl, decode_cabac_residual_dc_422(const H264Context *h, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, const uint8_t *scantable, int cat, int n, const uint8_t *scantable,
int max_coeff) int max_coeff)
@ -1834,7 +1834,7 @@ decode_cabac_residual_dc_422(H264Context *h, H264SliceContext *sl,
decode_cabac_residual_dc_internal_422(h, sl, block, cat, n, scantable, max_coeff); decode_cabac_residual_dc_internal_422(h, sl, block, cat, n, scantable, max_coeff);
} }
static av_always_inline void decode_cabac_residual_nondc(H264Context *h, static av_always_inline void decode_cabac_residual_nondc(const H264Context *h,
H264SliceContext *sl, H264SliceContext *sl,
int16_t *block, int16_t *block,
int cat, int n, int cat, int n,
@ -1854,7 +1854,7 @@ static av_always_inline void decode_cabac_residual_nondc(H264Context *h,
decode_cabac_residual_nondc_internal(h, sl, block, cat, n, scantable, qmul, max_coeff); decode_cabac_residual_nondc_internal(h, sl, block, cat, n, scantable, qmul, max_coeff);
} }
static av_always_inline void decode_cabac_luma_residual(H264Context *h, H264SliceContext *sl, static av_always_inline void decode_cabac_luma_residual(const H264Context *h, H264SliceContext *sl,
const uint8_t *scan, const uint8_t *scan8x8, const uint8_t *scan, const uint8_t *scan8x8,
int pixel_shift, int mb_type, int cbp, int p) int pixel_shift, int mb_type, int cbp, int p)
{ {
@ -1906,7 +1906,7 @@ static av_always_inline void decode_cabac_luma_residual(H264Context *h, H264Slic
* Decode a macroblock. * Decode a macroblock.
* @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR if an error is noticed * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR if an error is noticed
*/ */
int ff_h264_decode_mb_cabac(H264Context *h, H264SliceContext *sl) int ff_h264_decode_mb_cabac(const H264Context *h, H264SliceContext *sl)
{ {
int mb_xy; int mb_xy;
int mb_type, partition_count, cbp = 0; int mb_type, partition_count, cbp = 0;